xref: /dports/multimedia/libvdpau/libvdpau-c3d1a9dbafdfe6144ff474d0d523dc01b068750f/include/vdpau/vdpau.h

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/**
 * \mainpage Video Decode and Presentation API for Unix
 *
 * \section intro Introduction
 *
 * The Video Decode and Presentation API for Unix (VDPAU) provides
 * a complete solution for decoding, post-processing, compositing,
 * and displaying compressed or uncompressed video streams. These
 * video streams may be combined (composited) with bitmap content,
 * to implement OSDs and other application user interfaces.
 *
 * \section api_partitioning API Partitioning
 *
 * VDPAU is split into two distinct modules:
 * - \ref api_core
 * - \ref api_winsys
 *
 * The intent is that most VDPAU functionality exists and
 * operates identically across all possible Windowing Systems.
 * This functionality is the \ref api_core.
 *
 * However, a small amount of functionality must be included that
 * is tightly coupled to the underlying Windowing System. This
 * functionality is the \ref api_winsys. Possibly examples
 * include:
 * - Creation of the initial VDPAU \ref VdpDevice "VdpDevice"
 *   handle, since this act requires intimate knowledge of the
 *   underlying Window System, such as specific display handle or
 *   driver identification.
 * - Conversion of VDPAU surfaces to/from underlying Window
 *   System surface types, e.g. to allow manipulation of
 *   VDPAU-generated surfaces via native Window System APIs.
 *
 * \section objects Object Types
 *
 * VDPAU is roughly object oriented; most functionality is
 * exposed by creating an object (handle) of a certain class
 * (type), then executing various functions against that handle.
 * The set of object classes supported, and their purpose, is
 * discussed below.
 *
 * \subsection device_type Device Type
 *
 * A \ref VdpDevice "VdpDevice" is the root object in VDPAU's
 * object system. The \ref api_winsys allows creation of a \ref
 * VdpDevice "VdpDevice" object handle, from which all other API
 * entry points can be retrieved and invoked.
 *
 * \subsection surface_types Surface Types
 *
 * A surface stores pixel information. Various types of surfaces
 * existing for different purposes:
 *
 * - \ref VdpVideoSurface "VdpVideoSurface"s store decompressed
 *   YCbCr video frames in an implementation-defined internal
 *   format.
 * - \ref VdpOutputSurface "VdpOutputSurface"s store RGB 4:4:4
 *   data. They are legal render targets for video
 *   post-processing and compositing operations.
 * - \ref VdpBitmapSurface "VdpBitmapSurface"s store RGB 4:4:4
 *   data. These surfaces are designed to contain read-only
 *   bitmap data, to be used for OSD or application UI
 *   compositing.
 *
 * \subsection transfer_types Transfer Types
 *
 * A data transfer object reads data from a surface (or
 * surfaces), processes it, and writes the result to another
 * surface. Various types of processing are possible:
 *
 * - \ref VdpDecoder "VdpDecoder" objects process compressed video
 *   data, and generate decompressed images.
 * - \ref VdpOutputSurface "VdpOutputSurface"s have their own \ref
 *   VdpOutputSurfaceRender "rendering functionality".
 * - \ref VdpVideoMixer "VdpVideoMixer" objects perform video
 *   post-processing, de-interlacing, and compositing.
 * - \ref VdpPresentationQueue "VdpPresentationQueue" is
 *   responsible for timestamp-based display of surfaces.
 *
 * \section data_flow Data Flow
 *
 * Compressed video data originates in the application's memory
 * space. This memory is typically obtained using \c malloc, and
 * filled via regular file or network read system calls.
 * Alternatively, the application may \c mmap a file.
 *
 * The compressed data is then processed using a \ref VdpDecoder
 * "VdpDecoder", which will decompress the field or frame,
 * and write the result into a \ref VdpVideoSurface
 * "VdpVideoSurface". This action may require reading pixel data
 * from some number of other \ref VdpVideoSurface "VdpVideoSurface"
 * objects, depending on the type of compressed data and
 * field/frame in question.
 *
 * If the application wishes to display any form of OSD or
 * user-interface, this must be created in a \ref
 * VdpOutputSurface "VdpOutputSurface".
 *
 * This process begins with the creation of \ref VdpBitmapSurface
 * "VdpBitmapSurface" objects to contain the OSD/UI's static data,
 * such as individual glyphs.
 *
 * \ref VdpOutputSurface "VdpOutputSurface" \ref
 * VdpOutputSurfaceRender "rendering functionality" may be used
 * to composite together various \ref VdpBitmapSurface
 * "VdpBitmapSurface"s and \ref VdpOutputSurface
 * "VdpOutputSurface"s, into another VdpOutputSurface
 * "VdpOutputSurface".
 *
 * Once video has been decoded, it must be post-processed. This
 * involves various steps such as color space conversion,
 * de-interlacing, and other video adjustments. This step is
 * performed using an \ref VdpVideoMixer "VdpVideoMixer" object.
 * This object can not only perform the aforementioned video
 * post-processing, but also composite the video with a number of
 * \ref VdpOutputSurface "VdpOutputSurface"s, thus allowing complex
 * user interfaces to be built. The final result is written into
 * another \ref VdpOutputSurface "VdpOutputSurface".
 *
 * Note that at this point, the resultant \ref VdpOutputSurface
 * "VdpOutputSurface" may be fed back through the above path,
 * either using \ref VdpOutputSurface "VdpOutputSurface" \ref
 * VdpOutputSurfaceRender "rendering functionality",
 * or as input to the \ref VdpVideoMixer "VdpVideoMixer" object.
 *
 * Finally, the resultant \ref VdpOutputSurface
 * "VdpOutputSurface" must be displayed on screen. This is the job
 * of the \ref VdpPresentationQueue "VdpPresentationQueue" object.
 *
 * \image html vdpau_data_flow.png
 *
 * \section entry_point_retrieval Entry Point Retrieval
 *
 * VDPAU is designed so that multiple implementations can be
 * used without application changes. For example, VDPAU could be
 * hosted on X11, or via direct GPU access.
 *
 * The key technology behind this is the use of function
 * pointers and a "get proc address" style API for all entry
 * points. Put another way, functions are not called directly
 * via global symbols set up by the linker, but rather through
 * pointers.
 *
 * In practical terms, the \ref api_winsys provides factory
 * functions which not only create and return \ref VdpDevice
 * "VdpDevice" objects, but also a function pointer to a \ref
 * VdpGetProcAddress function, through which all entry point
 * function pointers will be retrieved.
 *
 * \subsection entry_point_philosophy Philosophy
 *
 * It is entirely possible to envisage a simpler scheme whereby
 * such function pointers are hidden. That is, the application
 * would link against a wrapper library that exposed "real"
 * functions. The application would then call such functions
 * directly, by symbol, like any other function. The wrapper
 * library would handle loading the appropriate back-end, and
 * implementing a similar "get proc address" scheme internally.
 *
 * However, the above scheme does not work well in the context
 * of separated \ref api_core and \ref api_winsys. In this
 * scenario, one would require a separate wrapper library per
 * Window System, since each Window System would have a
 * different function name and prototype for the main factory
 * function. If an application then wanted to be Window System
 * agnostic (making final determination at run-time via some
 * form of plugin), it may then need to link against two
 * wrapper libraries, which would cause conflicts for all
 * symbols other than the main factory function.
 *
 * Another disadvantage of the wrapper library approach is the
 * extra level of function call required; the wrapper library
 * would internally implement the existing "get proc address"
 * and "function pointer" style dispatch anyway. Exposing this
 * directly to the application is slightly more efficient.
 *
 * \section threading Multi-threading
 *
 * All VDPAU functionality is fully thread-safe; any number of
 * threads may call into any VDPAU functions at any time. VDPAU
 * may not be called from signal-handlers.
 *
 * Note, however, that this simply guarantees that internal
 * VDPAU state will not be corrupted by thread usage, and that
 * crashes and deadlocks will not occur. Completely arbitrary
 * thread usage may not generate the results that an application
 * desires. In particular, care must be taken when multiple
 * threads are performing operations on the same VDPAU objects.
 *
 * VDPAU implementations guarantee correct flow of surface
 * content through the rendering pipeline, but only when
 * function calls that read from or write to a surface return to
 * the caller prior to any thread calling any other function(s)
 * that read from or write to the surface. Invoking multiple
 * reads from a surface in parallel is OK.
 *
 * Note that this restriction is placed upon VDPAU function
 * invocations, and specifically not upon any back-end
 * hardware's physical rendering operations. VDPAU
 * implementations are expected to internally synchronize such
 * hardware operations.
 *
 * In a single-threaded application, the above restriction comes
 * naturally; each function call completes before it is possible
 * to begin a new function call.
 *
 * In a multi-threaded application, threads may need to be
 * synchronized. For example, consider the situation where:
 *
 * - Thread 1 is parsing compressed video data, passing them
 *   through a \ref VdpDecoder "VdpDecoder" object, and filling a
 *   ring-buffer of \ref VdpVideoSurface "VdpVideoSurface"s
 * - Thread 2 is consuming those \ref VdpVideoSurface
 *   "VdpVideoSurface"s, and using a \ref VdpVideoMixer
 *   "VdpVideoMixer" to process them and composite them with UI.
 *
 * In this case, the threads must synchronize to ensure that
 * thread 1's call to \ref VdpDecoderRender has returned prior to
 * thread 2's call(s) to \ref VdpVideoMixerRender that use that
 * specific surface. This could be achieved using the following
 * pseudo-code:
 *
 * \code
 * Queue<VdpVideoSurface> q_full_surfaces;
 * Queue<VdpVideoSurface> q_empty_surfaces;
 *
 * thread_1() {
 *     for (;;) {
 *         VdpVideoSurface s = q_empty_surfaces.get();
 *         // Parse compressed stream here
 *         VdpDecoderRender(s, ...);
 *         q_full_surfaces.put(s);
 *     }
 * }
 *
 * // This would need to be more complex if
 * // VdpVideoMixerRender were to be provided with more
 * // than one field/frame at a time.
 * thread_2() {
 *     for (;;) {
 *         // Possibly, other rendering operations to mixer
 *         // layer surfaces here.
 *         VdpOutputSurface t = ...;
 *         VdpPresentationQueueBlockUntilSurfaceIdle(t);
 *         VdpVideoSurface s = q_full_surfaces.get();
 *         VdpVideoMixerRender(s, t, ...);
 *         q_empty_surfaces.put(s);
 *         // Possibly, other rendering operations to "t" here
 *         VdpPresentationQueueDisplay(t, ...);
 *     }
 * }
 * \endcode
 *
 * Finally, note that VDPAU makes no guarantees regarding any
 * level of parallelism in any given implementation. Put another
 * way, use of multi-threading is not guaranteed to yield any
 * performance gain, and in theory could even slightly reduce
 * performance due to threading/synchronization overhead.
 *
 * However, the intent of the threading requirements is to allow
 * for e.g. video decoding and video mixer operations to proceed
 * in parallel in hardware. Given a (presumably multi-threaded)
 * application that kept each portion of the hardware busy, this
 * would yield a performance increase.
 *
 * \section endianness Surface Endianness
 *
 * When dealing with surface content, i.e. the input/output of
 * Put/GetBits functions, applications must take care to access
 * memory in the correct fashion, so as to avoid endianness
 * issues.
 *
 * By established convention in the 3D graphics world, RGBA data
 * is defined to be an array of 32-bit pixels containing packed
 * RGBA components, not as an array of bytes or interleaved RGBA
 * components. VDPAU follows this convention. As such,
 * applications are expected to access such surfaces as arrays
 * of 32-bit components (i.e. using a 32-bit pointer), and not
 * as interleaved arrays of 8-bit components (i.e. using an
 * 8-bit pointer.) Deviation from this convention will lead to
 * endianness issues, unless appropriate care is taken.
 *
 * The same convention is followed for some packed YCbCr formats
 * such as \ref VDP_YCBCR_FORMAT_Y8U8V8A8; i.e. they are
 * considered arrays of 32-bit pixels, and hence should be
 * accessed as such.
 *
 * For YCbCr formats with chroma decimation and/or planar
 * formats, however, this convention is awkward. Therefore,
 * formats such as \ref VDP_YCBCR_FORMAT_NV12 are defined as
 * arrays of (potentially interleaved) byte-sized components.
 * Hence, applications should manipulate such data 8-bits at a
 * time, using 8-bit pointers.
 *
 * Note that one common usage for the input/output of
 * Put/GetBits APIs is file I/O. Typical file I/O APIs treat all
 * memory as a simple array of 8-bit values. This violates the
 * rule requiring surface data to be accessed in its true native
 * format. As such, applications may be required to solve
 * endianness issues. Possible solutions include:
 *
 * - Authoring static UI data files according to the endianness
 *   of the target execution platform.
 * - Conditionally byte-swapping Put/GetBits data buffers at
 *   run-time based on execution platform.
 *
 * Note: Complete details regarding each surface format's
 * precise pixel layout is included with the documentation of
 * each surface type. For example, see \ref
 * VDP_RGBA_FORMAT_B8G8R8A8.
 *
 * \section video_decoder_usage Video Decoder Usage
 *
 * VDPAU is a slice-level API. Put another way, VDPAU implementations accept
 * "slice" data from the bitstream, and perform all required processing of
 * those slices (e.g VLD decoding, IDCT, motion compensation, in-loop
 * deblocking, etc.).
 *
 * The client application is responsible for:
 *
 * - Extracting the slices from the bitstream (e.g. parsing/demultiplexing
 *   container formats, scanning the data to determine slice start positions
 *   and slice sizes).
 * - Parsing various bitstream headers/structures (e.g. sequence header,
 *   sequence parameter set, picture parameter set, entry point structures,
 *   etc.) Various fields from the parsed header structures needs to be
 *   provided to VDPAU alongside the slice bitstream in a "picture info"
 *   structure.
 * - Surface management (e.g. H.264 DPB processing, display re-ordering)
 *
 * It is recommended that applications pass solely the slice data to VDPAU;
 * specifically that any header data structures be excluded from the portion
 * of the bitstream passed to VDPAU. VDPAU implementations must operate
 * correctly if non-slice data is included, at least for formats employing
 * start codes to delimit slice data. However, any extra data may need
 * to be uploaded to hardware for parsing thus lowering performance, and/or,
 * in the worst case, may even overflow internal buffers that are sized solely
 * for slice data.
 *
 * The exact data that should be passed to VDPAU is detailed below for each
 * supported format:
 *
 * \subsection bitstream_mpeg1_mpeg2 MPEG-1 and MPEG-2
 *
 * Include all slices beginning with start codes 0x00000101 through
 * 0x000001AF. The slice start code must be included for all slices.
 *
 * \subsection bitstream_h264 H.264
 *
 * Include all NALs with nal_unit_type of 1 or 5 (coded slice of non-IDR/IDR
 * picture respectively). The complete slice start code (including 0x000001
 * prefix) must be included for all slices, even when the prefix is not
 * included in the bitstream.
 *
 * Note that if desired:
 *
 * - The slice start code prefix may be included in a separate bitstream
 *   buffer array entry to the actual slice data extracted from the bitstream.
 * - Multiple bitstream buffer array entries (e.g. one per slice) may point at
 *   the same physical data storage for the slice start code prefix.
 *
 * \subsection bitstream_vc1_sp_mp VC-1 Simple and Main Profile
 *
 * VC-1 simple/main profile bitstreams always consist of a single slice per
 * picture, and do not use start codes to delimit pictures. Instead, the
 * container format must indicate where each picture begins/ends.
 *
 * As such, no slice start codes should be included in the data passed to
 * VDPAU; simply pass in the exact data from the bitstream.
 *
 * Header information contained in the bitstream should be parsed by the
 * application and passed to VDPAU using the "picture info" data structure;
 * this header information explicitly must not be included in the bitstream
 * data passed to VDPAU for this encoding format.
 *
 * \subsection bitstream_vc1_ap VC-1 Advanced Profile
 *
 * Include all slices beginning with start codes 0x0000010D (frame),
 * 0x0000010C (field) or 0x0000010B (slice). The slice start code should be
 * included in all cases.
 *
 * Some VC-1 advanced profile streams do not contain slice start codes; again,
 * the container format must indicate where picture data begins and ends. In
 * this case, pictures are assumed to be progressive and to contain a single
 * slice. It is highly recommended that applications detect this condition,
 * and add the missing start codes to the bitstream passed to VDPAU. However,
 * VDPAU implementations must allow bitstreams with missing start codes, and
 * act as if a 0x0000010D (frame) start code had been present.
 *
 * Note that pictures containing multiple slices, or interlace streams, must
 * contain a complete set of slice start codes in the original bitstream;
 * without them, it is not possible to correctly parse and decode the stream.
 *
 * The bitstream passed to VDPAU should contain all original emulation
 * prevention bytes present in the original bitstream; do not remove these
 * from the bitstream.
 *
 * \subsection bitstream_mpeg4part2 MPEG-4 Part 2 and DivX
 *
 * Include all slices beginning with start codes 0x000001B6. The slice start
 * code must be included for all slices.
 *
 * \subsection bitstream_hevc H.265/HEVC - High Efficiency Video Codec
 *
 * Include all video coding layer (VCL) NAL units, with nal_unit_type values
 * of 0 (TRAIL_N) through 31 (RSV_VCL31) inclusive. In addition to parsing
 * and providing NAL units, an H.265/HEVC decoder application using VDPAU
 * for decoding must parse certain values of the first slice segment header
 * in a VCL NAL unit and provide it through VdpPictureInfoHEVC. Please see
 * the documentation for VdpPictureInfoHEVC below for further details.
 *
 * The complete slice start code (including the 0x000001 prefix) must be
 * included for all slices, even when the prefix is not included in the
 * bitstream.
 *
 * Note that if desired:
 *
 * - The slice start code prefix may be included in a separate bitstream
 *   buffer array entry to the actual slice data extracted from the bitstream.
 * - Multiple bitstream buffer array entries (e.g. one per slice) may point at
 *   the same physical data storage for the slice start code prefix.
 *
 * \section video_mixer_usage Video Mixer Usage
 *
 * \subsection video_surface_content VdpVideoSurface Content
 *
 * Each \ref VdpVideoSurface "VdpVideoSurface" is expected to contain an
 * entire frame's-worth of data, irrespective of whether an interlaced of
 * progressive sequence is being decoded.
 *
 * Depending on the exact encoding structure of the compressed video stream,
 * the application may need to call \ref VdpDecoderRender twice to fill a
 * single \ref VdpVideoSurface "VdpVideoSurface". When the stream contains an
 * encoded progressive frame, or a "frame coded" interlaced field-pair, a
 * single \ref VdpDecoderRender call will fill the entire surface. When the
 * stream contains separately encoded interlaced fields, two
 * \ref VdpDecoderRender calls will be required; one for the top field, and
 * one for the bottom field.
 *
 * Implementation note: When \ref VdpDecoderRender renders an interlaced
 * field, this operation must not disturb the content of the other field in
 * the surface.
 *
 * \subsection vm_surf_list VdpVideoMixer Surface List
 *
 * An video stream is logically composed of a sequence of fields. An
 * example is shown below, in display order, assuming top field first:
 *
 * <pre>t0 b0 t1 b1 t2 b2 t3 b3 t4 b4 t5 b5 t6 b6 t7 b7 t8 b8 t9 b9</pre>
 *
 * The canonical usage is to call \ref VdpVideoMixerRender once for decoded
 * field, in display order, to yield one post-processed frame for display.
 *
 * For each call to \ref VdpVideoMixerRender, the field to be processed should
 * be provided as the \b video_surface_current parameter.
 *
 * To enable operation of advanced de-interlacing algorithms and/or
 * post-processing algorithms, some past and/or future surfaces should be
 * provided as context. These are provided in the \b video_surface_past and
 * \b video_surface_future lists. In general, these lists may contain any
 * number of surfaces. Specific implementations may have specific requirements
 * determining the minimum required number of surfaces for optimal operation,
 * and the maximum number of useful surfaces, beyond which surfaces are not
 * used. It is recommended that in all cases other than plain bob/weave, at
 * least 2 past and 1 future field be provided.
 *
 * Note that it is entirely possible, in general, for any of the
 * \ref VdpVideoMixer "VdpVideoMixer" post-processing steps other than
 * de-interlacing to require access to multiple input fields/frames. For
 * example, an motion-sensitive noise-reduction algorithm.
 *
 * For example, when processing field t4, the \ref VdpVideoMixerRender
 * parameters may contain the following values, if the application chose to
 * provide 3 fields of context for both the past and future:
 *
 * <pre>
 * current_picture_structure: VDP_VIDEO_MIXER_PICTURE_STRUCTURE_TOP_FIELD
 * past:    [b3, t3, b2]
 * current: t4
 * future:  [b4, t5, b5]
 * </pre>
 *
 * Note that for both the past/future lists, array index 0 represents the
 * field temporally closest to current, in display order.
 *
 * The \ref VdpVideoMixerRender parameter \b current_picture_structure applies
 * to \b video_surface_current. The picture structure for the other surfaces
 * will be automatically derived from that for the current picture. The
 * derivation algorithm is extremely simple; the concatenated list
 * past/current/future is simply assumed to have an alternating top/bottom
 * pattern throughout.
 *
 * Continuing the example above, subsequent calls to \ref VdpVideoMixerRender
 * would provide the following sets of parameters:
 *
 * <pre>
 * current_picture_structure: VDP_VIDEO_MIXER_PICTURE_STRUCTURE_BOTTOM_FIELD
 * past:    [t4, b3, t3]
 * current: b4
 * future:  [t5, b5, t6]
 * </pre>
 *
 * then:
 *
 * <pre>
 * current_picture_structure: VDP_VIDEO_MIXER_PICTURE_STRUCTURE_TOP_FIELD
 * past:    [b4, t4, b3]
 * current: t5
 * future:  [b5, t6, b7]
 * </pre>
 *
 * In other words, the concatenated list of past/current/future frames simply
 * forms a window that slides through the sequence of decoded fields.
 *
 * It is syntactically legal for an application to choose not to provide a
 * particular entry in the past or future lists. In this case, the "slot" in
 * the surface list must be filled with the special value
 * \ref VDP_INVALID_HANDLE, to explicitly indicate that the picture is
 * missing; do not simply shuffle other surfaces together to fill in the gap.
 * Note that entries should only be omitted under special circumstances, such
 * as failed decode due to bitstream error during picture header parsing,
 * since missing entries will typically cause advanced de-interlacing
 * algorithms to experience significantly degraded operation.
 *
 * Specific examples for different de-interlacing types are presented below.
 *
 * \subsection deint_weave Weave De-interlacing
 *
 * Weave de-interlacing is the act of interleaving the lines of two temporally
 * adjacent fields to form a frame for display.
 *
 * To disable de-interlacing for progressive streams, simply specify
 * \b current_picture_structure as \ref VDP_VIDEO_MIXER_PICTURE_STRUCTURE_FRAME;
 * no de-interlacing will be applied.
 *
 * Weave de-interlacing for interlaced streams is identical to disabling
 * de-interlacing, as describe immediately above, because each
 * \ref VdpVideoSurface already contains an entire frame's worth (i.e. two
 * fields) of picture data.
 *
 * Inverse telecine is disabled when using weave de-interlacing.
 *
 * Weave de-interlacing produces one output frame for each input frame. The
 * application should make one \ref VdpVideoMixerRender call per pair of
 * decoded fields, or per decoded frame.
 *
 * Weave de-interlacing requires no entries in the past/future lists.
 *
 * All implementations must support weave de-interlacing.
 *
 * \subsection deint_bob Bob De-interlacing
 *
 * Bob de-interlacing is the act of vertically scaling a single field to the
 * size of a single frame.
 *
 * To achieve bob de-interlacing, simply provide a single field as
 * \b video_surface_current, and set \b current_picture_structure
 * appropriately, to indicate whether a top or bottom field was provided.
 *
 * Inverse telecine is disabled when using bob de-interlacing.
 *
 * Bob de-interlacing produces one output frame for each input field. The
 * application should make one \ref VdpVideoMixerRender call per decoded
 * field.
 *
 * Bob de-interlacing requires no entries in the past/future lists.
 *
 * Bob de-interlacing is the default when no advanced method is requested and
 * enabled. Advanced de-interlacing algorithms may fall back to bob e.g. when
 * required past/future fields are missing.
 *
 * All implementations must support bob de-interlacing.
 *
 * \subsection deint_adv Advanced De-interlacing
 *
 * Operation of both temporal and temporal-spatial de-interlacing is
 * identical; the only difference is the internal processing the algorithm
 * performs in generating the output frame.
 *
 * These algorithms use various advanced processing on the pixels of both the
 * current and various past/future fields in order to determine how best to
 * de-interlacing individual portions of the image.
 *
 * Inverse telecine may be enabled when using advanced de-interlacing.
 *
 * Advanced de-interlacing produces one output frame for each input field. The
 * application should make one \ref VdpVideoMixerRender call per decoded
 * field.
 *
 * Advanced de-interlacing requires entries in the past/future lists.
 *
 * Availability of advanced de-interlacing algorithms is implementation
 * dependent.
 *
 * \subsection deint_rate De-interlacing Rate
 *
 * For all de-interlacing algorithms except weave, a choice may be made to
 * call \ref VdpVideoMixerRender for either each decoded field, or every
 * second decoded field.
 *
 * If \ref VdpVideoMixerRender is called for every decoded field, the
 * generated post-processed frame rate is equal to the decoded field rate.
 * Put another way, the generated post-processed nominal field rate is equal
 * to 2x the decoded field rate. This is standard practice.
 *
 * If \ref VdpVideoMixerRender is called for every second decoded field (say
 * every top field), the generated post-processed frame rate is half to the
 * decoded field rate. This mode of operation is thus referred to as
 * "half-rate".
 *
 * Implementations may choose whether to support half-rate de-interlacing
 * or not. Regular full-rate de-interlacing should be supported by any
 * supported advanced de-interlacing algorithm.
 *
 * The descriptions of de-interlacing algorithms above assume that regular
 * (not half-rate) operation is being performed, when detailing the number of
 * VdpVideoMixerRender calls.
 *
 * Recall that the concatenation of past/current/future surface lists simply
 * forms a window into the stream of decoded fields. To achieve standard
 * de-interlacing, the window is slid through the list of decoded fields one
 * field at a time, and a call is made to \ref VdpVideoMixerRender for each
 * movement of the window. To achieve half-rate de-interlacing, the window is
 * slid through the* list of decoded fields two fields at a time, and a
 * call is made to \ref VdpVideoMixerRender for each movement of the window.
 *
 * \subsection invtc Inverse Telecine
 *
 * Assuming the implementation supports it, inverse telecine may be enabled
 * alongside any advanced de-interlacing algorithm. Inverse telecine is never
 * active for bob or weave.
 *
 * Operation of \ref VdpVideoMixerRender with inverse telecine active is
 * identical to the basic operation mechanisms describe above in every way;
 * all inverse telecine processing is performed internally to the
 * \ref VdpVideoMixer "VdpVideoMixer".
 *
 * In particular, there is no provision way for \ref VdpVideoMixerRender to
 * indicate when identical input fields have been observed, and consequently
 * identical output frames may have been produced.
 *
 * De-interlacing (and inverse telecine) may be applied to streams that are
 * marked as being progressive. This will allow detection of, and correct
 * de-interlacing of, mixed interlace/progressive streams, bad edits, etc.
 * To implement de-interlacing/inverse-telecine on progressive material,
 * simply treat the stream of decoded frames as a stream of decoded fields,
 * apply any telecine flags (see the next section), and then apply
 * de-interlacing to those fields as described above.
 *
 * Implementations are free to determine whether inverse telecine operates
 * in conjunction with half-rate de-interlacing or not. It should always
 * operate with regular de-interlacing, when advertized.
 *
 * \subsection tcflags Telecine (Pull-Down) Flags
 *
 * Some media delivery formats, e.g. DVD-Video, include flags that are
 * intended to modify the decoded field sequence before display. This allows
 * e.g. 24p content to be encoded at 48i, which saves space relative to a 60i
 * encoded stream, but still displayed at 60i, to match target consumer
 * display equipment.
 *
 * If the inverse telecine option is not activated in the
 * \ref VdpVideoMixer "VdpVideoMixer", these flags should be ignored, and the
 * decoded fields passed directly to \ref VdpVideoMixerRender as detailed
 * above.
 *
 * However, to make full use of the inverse telecine feature, these flags
 * should be applied to the field stream, yielding another field stream with
 * some repeated fields, before passing the field stream to
 * \ref VdpVideoMixerRender. In this scenario, the sliding window mentioned
 * in the descriptions above applies to the field stream after application of
 * flags.
 *
 * \section extending Extending the API
 *
 * \subsection extend_enums Enumerations and Other Constants
 *
 * VDPAU defines a number of enumeration types.
 *
 * When modifying VDPAU, existing enumeration constants must
 * continue to exist (although they may be deprecated), and do
 * so in the existing order.
 *
 * The above discussion naturally applies to "manually" defined
 * enumerations, using pre-processor macros, too.
 *
 * \subsection extend_structs Structures
 *
 * In most case, VDPAU includes no provision for modifying existing
 * structure definitions, although they may be deprecated.
 *
 * New structures may be created, together with new API entry
 * points or feature/attribute/parameter values, to expose new
 * functionality.
 *
 * A few structures are considered plausible candidates for future extension.
 * Such structures include a version number as the first field, indicating the
 * exact layout of the client-provided data. When changing such structures, the
 * old structure must be preserved and a new structure created. This allows
 * applications built against the old version of the structure to continue to
 * interoperate. For example, to extend the VdpProcamp structure, define a new
 * VdpProcamp1 and update VdpGenerateCSCMatrix to take the new structure as an
 * argument. Document in a comment that the caller must fill the struct_version
 * field with the value 1. VDPAU implementations should use the struct_version
 * field to determine which version of the structure the application was built
 * against.  Note that you cannot simply increment the value of
 * VDP_PROCAMP_VERSION because applications recompiled against a newer version
 * of vdpau.h but that have not been updated to use the new structure must still
 * report that they're using version 0.
 *
 * Note that the layouts of VdpPictureInfo structures are defined by their
 * corresponding VdpDecoderProfile numbers, so no struct_version field is
 * needed for them. This layout includes the size of the structure, so new
 * profiles that extend existing functionality may incorporate the old
 * VdpPictureInfo as a substructure, but may not modify existing VdpPictureInfo
 * structures.
 *
 * \subsection extend_functions Functions
 *
 * Existing functions may not be modified, although they may be
 * deprecated.
 *
 * New functions may be added at will. Note the enumeration
 * requirements when modifying the enumeration that defines the
 * list of entry points.
 *
 * \section preemption_note Display Preemption
 *
 * Please note that the display may be preempted away from
 * VDPAU at any time. See \ref display_preemption for more
 * details.
 *
 * \subsection trademarks Trademarks
 *
 * VDPAU is a trademark of NVIDIA Corporation. You may freely use the
 * VDPAU trademark, as long as trademark ownership is attributed to
 * NVIDIA Corporation.
 */

/**
 * \file vdpau.h
 * \brief The Core API
 *
 * This file contains the \ref api_core "Core API".
 */

#ifndef _VDPAU_H
#define _VDPAU_H

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \defgroup api_core Core API
 *
 * The core API encompasses all VDPAU functionality that operates
 * in the same fashion across all Window Systems.
 *
 * @{
 */

/**
 * \defgroup base_types Basic Types
 *
 * VDPAU primarily uses ISO C99 types from \c stdint.h.
 *
 * @{
 */

/** \brief A true \ref VdpBool value */
#define VDP_TRUE 1
/** \brief A false \ref VdpBool value */
#define VDP_FALSE 0
/**
 * \brief A boolean value, holding \ref VDP_TRUE or \ref
 * VDP_FALSE.
 */
typedef int VdpBool;

/** @} */

/**
 * \defgroup misc_types Miscellaneous Types
 *
 * @{
 */

/**
 * \brief An invalid object handle value.
 *
 * This value may be used to represent an invalid, or
 * non-existent, object (\ref VdpDevice "VdpDevice",
 * \ref VdpVideoSurface "VdpVideoSurface", etc.)
 *
 * Note that most APIs require valid object handles in all
 * cases, and will fail when presented with this value.
 */
#define VDP_INVALID_HANDLE 0xffffffffU

/**
 * \brief The set of all chroma formats for \ref VdpVideoSurface
 * "VdpVideoSurface"s.
 */
typedef uint32_t VdpChromaType;

/** \hideinitializer \brief 4:2:0 chroma format. Undefined field/frame based
 *  Video surfaces allocated with this chroma type have undefined
 *  field/frame structure. The implementation is free to internally morph
 *  the surface between frame/field(NV12/NV24) as required by
 *  VdpVideoDecoder operation. Interop with OpenGL allows registration
 *  of these surfaces for either field- or frame-based interop. But, an implicit
 *  field/frame structure conversion may be performed.
 */
#define VDP_CHROMA_TYPE_420 ((VdpChromaType)0)
/** \hideinitializer \brief 4:2:2 chroma format. Undefined field/frame based
 *  Video surfaces allocated with this chroma type have undefined
 *  field/frame structure. The implementation is free to internally morph
 *  the surface between frame/field(NV12/NV24) as required by
 *  VdpVideoDecoder operation. Interop with OpenGL allows registration
 *  of these surfaces for either field- or frame-based interop. But, an implicit
 *  field/frame structure conversion may be performed.
 */
#define VDP_CHROMA_TYPE_422 ((VdpChromaType)1)
/** \hideinitializer \brief 4:4:4 chroma format. Undefined field/frame based
 *  Video surfaces allocated with this chroma type have undefined
 *  field/frame structure. The implementation is free to internally morph
 *  the surface between frame/field(NV12/NV24) as required by
 *  VdpVideoDecoder operation. Interop with OpenGL allows registration
 *  of these surfaces for either field- or frame-based interop. But, an implicit
 *  field/frame structure conversion may be performed.
 */
#define VDP_CHROMA_TYPE_444 ((VdpChromaType)2)

/** \hideinitializer \brief 4:2:0 chroma format. Field based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_420_FIELD ((VdpChromaType)3)
/** \hideinitializer \brief 4:2:2 chroma format. Field based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_422_FIELD ((VdpChromaType)4)
/** \hideinitializer \brief 4:4:4 chroma format. Field based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_444_FIELD ((VdpChromaType)5)

/** \hideinitializer \brief 4:2:0 chroma format. Frame based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_420_FRAME ((VdpChromaType)6)
/** \hideinitializer \brief 4:2:2 chroma format. Frame based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_422_FRAME ((VdpChromaType)7)
/** \hideinitializer \brief 4:4:4 chroma format. Frame based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_444_FRAME ((VdpChromaType)8)
/** \hideinitializer \brief 4:2:0 chroma format. Undefined field/frame based
 *  Video surfaces allocated with this chroma type have undefined
 *  field/frame structure. The implementation is free to internally morph
 *  the surface between frame/field as required by VdpVideoDecoder operation.
 *  Interop with OpenGL allows registration of these surfaces for either
 *  field- or frame-based interop. But, an implicit field/frame structure
 *  conversion may be performed.
 */
#define VDP_CHROMA_TYPE_420_16 ((VdpChromaType)9)
/** \hideinitializer \brief 4:2:2 chroma format. Undefined field/frame based
 *  Video surfaces allocated with this chroma type have undefined
 *  field/frame structure. The implementation is free to internally morph
 *  the surface between frame/field as required by VdpVideoDecoder operation.
 *  Interop with OpenGL allows registration of these surfaces for either
 *  field- or frame-based interop. But, an implicit field/frame structure
 *  conversion may be performed.
 */
#define VDP_CHROMA_TYPE_422_16 ((VdpChromaType)10)
/** \hideinitializer \brief 4:4:4 chroma format. Undefined field/frame based
 *  Video surfaces allocated with this chroma type have undefined
 *  field/frame structure. The implementation is free to internally morph
 *  the surface between frame/field as required by VdpVideoDecoder operation.
 *  Interop with OpenGL allows registration of these surfaces for either
 *  field- or frame-based interop. But, an implicit field/frame structure
 *  conversion may be performed.
 */
#define VDP_CHROMA_TYPE_444_16 ((VdpChromaType)11)

/** \hideinitializer \brief 4:2:0 chroma format. Field based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_420_FIELD_16 ((VdpChromaType)12)
/** \hideinitializer \brief 4:2:2 chroma format. Field based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_422_FIELD_16 ((VdpChromaType)13)
/** \hideinitializer \brief 4:4:4 chroma format. Field based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_444_FIELD_16 ((VdpChromaType)14)

/** \hideinitializer \brief 4:2:0 chroma format. Frame based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_420_FRAME_16 ((VdpChromaType)15)
/** \hideinitializer \brief 4:2:2 chroma format. Frame based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_422_FRAME_16 ((VdpChromaType)16)
/** \hideinitializer \brief 4:4:4 chroma format. Frame based.
 *  Video surfaces allocated with this chroma type can only be
 *  interoped with OpenGL if the matching field/frame structure is
 *  specified in the OpenGL API */
#define VDP_CHROMA_TYPE_444_FRAME_16 ((VdpChromaType)17)

/**
 * \brief The set of all known YCbCr surface formats.
 */
typedef uint32_t VdpYCbCrFormat;

/**
 * \hideinitializer
 * \brief The "NV12" YCbCr surface format.
 *
 * This format has a two planes, a Y plane and a UV plane.
 *
 * The Y plane is an array of byte-sized Y components.
 * Applications should access this data via a uint8_t pointer.
 *
 * The UV plane is an array of interleaved byte-sized U and V
 * components, in the order U, V, U, V. Applications should
 * access this data via a uint8_t pointer.
 */
#define VDP_YCBCR_FORMAT_NV12     ((VdpYCbCrFormat)0)
/**
 * \hideinitializer
 * \brief The "YV12" YCbCr surface format.
 *
 * This format has a three planes, a Y plane, a V plane, and a U
 * plane.
 *
 * Each of the planes is an array of byte-sized components.
 *
 * Applications should access this data via a uint8_t pointer.
 */
#define VDP_YCBCR_FORMAT_YV12     ((VdpYCbCrFormat)1)
/**
 * \hideinitializer
 * \brief The "UYVY" YCbCr surface format.
 *
 * This format may also be known as Y422, UYNV, HDYC.
 *
 * This format has a single plane.
 *
 * This plane is an array of interleaved byte-sized Y, U, and V
 * components, in the order U, Y, V, Y, U, Y, V, Y.
 *
 * Applications should access this data via a uint8_t pointer.
 */
#define VDP_YCBCR_FORMAT_UYVY     ((VdpYCbCrFormat)2)
/**
 * \hideinitializer
 * \brief The "YUYV" YCbCr surface format.
 *
 * This format may also be known as YUY2, YUNV, V422.
 *
 * This format has a single plane.
 *
 * This plane is an array of interleaved byte-sized Y, U, and V
 * components, in the order Y, U, Y, V, Y, U, Y, V.
 *
 * Applications should access this data via a uint8_t pointer.
 */
#define VDP_YCBCR_FORMAT_YUYV     ((VdpYCbCrFormat)3)
/**
 * \hideinitializer
 * \brief A packed YCbCr format.
 *
 * This format has a single plane.
 *
 * This plane is an array packed 32-bit pixel data. Within each
 * 32-bit pixel, bits [31:24] contain A, bits [23:16] contain V,
 * bits [15:8] contain U, and bits [7:0] contain Y.
 *
 * Applications should access this data via a uint32_t pointer.
 */
#define VDP_YCBCR_FORMAT_Y8U8V8A8 ((VdpYCbCrFormat)4)
/**
 * \hideinitializer
 * \brief A packed YCbCr format.
 *
 * This format has a single plane.
 *
 * This plane is an array packed 32-bit pixel data. Within each
 * 32-bit pixel, bits [31:24] contain A, bits [23:16] contain Y,
 * bits [15:8] contain U, and bits [7:0] contain V.
 *
 * Applications should access this data via a uint32_t pointer.
 */
#define VDP_YCBCR_FORMAT_V8U8Y8A8 ((VdpYCbCrFormat)5)
/**
 * \hideinitializer
 * \brief The "Y_UV_444" YCbCr surface format.
 *
 * This format has two planes, a Y plane and a UV plane.
 *
 * The Y plane is an array of byte-sized Y components.
 * Applications should access this data via a uint8_t pointer.
 *
 * The UV plane is an array of interleaved byte-sized U and V
 * components, in the order U, V, U, V. Applications should
 * access this data via a uint8_t pointer.
 */
#define VDP_YCBCR_FORMAT_Y_UV_444     ((VdpYCbCrFormat)6)
/**
 * \hideinitializer
 * \brief The "Y_U_V_444" YCbCr surface format.
 *
 * This format has three planes, a Y plane, a V plane, and a U
 * plane.
 *
 * Each of the planes is an array of byte-sized components.
 *
 * Applications should access this data via a uint8_t pointer.
 */
#define VDP_YCBCR_FORMAT_Y_U_V_444     ((VdpYCbCrFormat)7)
/**
 * \hideinitializer
 * \brief The P010 surface format.
 *
 * This format has two planes, a Y plane and a UV plane.
 *
 * The Y plane is an array of two byte sized Y components.
 * Applications should access this data via a uint16_t pointer.
 *
 * The UV plane is an array of interleaved two byte sized U and V
 * components, in the order U, V, U, V. Applications should
 * access this data via a uint8_t pointer.
 *
 * Note that the P010 surface format has an identical memory
 * layout as the P016 surface format, with bits 0 through 5
 * set to zero.
 */
#define VDP_YCBCR_FORMAT_P010           ((VdpYCbCrFormat)8)
/**
 * \hideinitializer
 * \brief The P016 surface format.
 *
 * This format has two planes, a Y plane and a UV plane.
 *
 * The Y plane is an array of two byte sized Y components.
 * Applications should access this data via a uint16_t pointer.
 *
 * The UV plane is an array of interleaved two byte sized U and V
 * components, in the order U, V, U, V. Applications should
 * access this data via a uint8_t pointer.
 */
#define VDP_YCBCR_FORMAT_P016           ((VdpYCbCrFormat)9)
 /**
  * \hideinitializer
  * \brief The "Y_U_V_444_16" YCbCr surface format.
  *
  * This format has three planes, a Y plane, a V plane, and a U
  * plane.
  *
  * Each of the planes is an array of two byte-sized components.
  *
  * Applications should access this data via a uint16_t pointer.
  */
 #define VDP_YCBCR_FORMAT_Y_U_V_444_16     ((VdpYCbCrFormat)11)

/**
 * \brief  The set of all known RGB surface formats.
 */
typedef uint32_t VdpRGBAFormat;

/**
 * \hideinitializer
 * \brief A packed RGB format.
 *
 * This format has a single plane.
 *
 * This plane is an array packed 32-bit pixel data. Within each
 * 32-bit pixel, bits [31:24] contain A, bits [23:16] contain R,
 * bits [15:8] contain G, and bits [7:0] contain B.
 *
 * Applications should access this data via a uint32_t pointer.
 */
#define VDP_RGBA_FORMAT_B8G8R8A8    ((VdpRGBAFormat)0)
/**
 * \hideinitializer
 * \brief A packed RGB format.
 *
 * This format has a single plane.
 *
 * This plane is an array packed 32-bit pixel data. Within each
 * 32-bit pixel, bits [31:24] contain A, bits [23:16] contain B,
 * bits [15:8] contain G, and bits [7:0] contain R.
 *
 * Applications should access this data via a uint32_t pointer.
 */
#define VDP_RGBA_FORMAT_R8G8B8A8    ((VdpRGBAFormat)1)
/**
 * \hideinitializer
 * \brief A packed RGB format.
 *
 * This format has a single plane.
 *
 * This plane is an array packed 32-bit pixel data. Within each
 * 32-bit pixel, bits [31:30] contain A, bits [29:20] contain B,
 * bits [19:10] contain G, and bits [9:0] contain R.
 *
 * Applications should access this data via a uint32_t pointer.
 */
#define VDP_RGBA_FORMAT_R10G10B10A2 ((VdpRGBAFormat)2)
/**
 * \hideinitializer
 * \brief A packed RGB format.
 *
 * This format has a single plane.
 *
 * This plane is an array packed 32-bit pixel data. Within each
 * 32-bit pixel, bits [31:30] contain A, bits [29:20] contain R,
 * bits [19:10] contain G, and bits [9:0] contain B.
 *
 * Applications should access this data via a uint32_t pointer.
 */
#define VDP_RGBA_FORMAT_B10G10R10A2 ((VdpRGBAFormat)3)
/**
 * \hideinitializer
 * \brief An alpha-only surface format.
 *
 * This format has a single plane.
 *
 * This plane is an array of byte-sized components.
 *
 * Applications should access this data via a uint8_t pointer.
 */
#define VDP_RGBA_FORMAT_A8          ((VdpRGBAFormat)4)

/**
 * \brief  The set of all known indexed surface formats.
 */
typedef uint32_t VdpIndexedFormat;

/**
 * \hideinitializer
 * \brief A 4-bit indexed format, with alpha.
 *
 * This format has a single plane.
 *
 * This plane is an array of byte-sized components. Within each
 * byte, bits [7:4] contain I (index), and bits [3:0] contain A.
 *
 * Applications should access this data via a uint8_t pointer.
 */
#define VDP_INDEXED_FORMAT_A4I4 ((VdpIndexedFormat)0)
/**
 * \hideinitializer
 * \brief A 4-bit indexed format, with alpha.
 *
 * This format has a single plane.
 *
 * This plane is an array of byte-sized components. Within each
 * byte, bits [7:4] contain A, and bits [3:0] contain I (index).
 *
 * Applications should access this data via a uint8_t pointer.
 */
#define VDP_INDEXED_FORMAT_I4A4 ((VdpIndexedFormat)1)
/**
 * \hideinitializer
 * \brief A 8-bit indexed format, with alpha.
 *
 * This format has a single plane.
 *
 * This plane is an array of interleaved byte-sized A and I
 * (index) components, in the order A, I, A, I.
 *
 * Applications should access this data via a uint8_t pointer.
 */
#define VDP_INDEXED_FORMAT_A8I8 ((VdpIndexedFormat)2)
/**
 * \hideinitializer
 * \brief A 8-bit indexed format, with alpha.
 *
 * This format has a single plane.
 *
 * This plane is an array of interleaved byte-sized A and I
 * (index) components, in the order I, A, I, A.
 *
 * Applications should access this data via a uint8_t pointer.
 */
#define VDP_INDEXED_FORMAT_I8A8 ((VdpIndexedFormat)3)

/**
 * \brief A location within a surface.
 *
 * The VDPAU co-ordinate system has its origin at the top-left
 * of a surface, with x and y components increasing right and
 * down.
 */
typedef struct {
    /** X co-ordinate. */
    uint32_t x;
    /** Y co-ordinate. */
    uint32_t y;
} VdpPoint;

/**
 * \brief A rectangular region of a surface.
 *
 * The co-ordinates are top-left inclusive, bottom-right
 * exclusive.
 *
 * The VDPAU co-ordinate system has its origin at the top-left
 * of a surface, with x and y components increasing right and
 * down.
 */
typedef struct {
    /** Left X co-ordinate. Inclusive. */
    uint32_t x0;
    /** Top Y co-ordinate. Inclusive. */
    uint32_t y0;
    /** Right X co-ordinate. Exclusive. */
    uint32_t x1;
    /** Bottom Y co-ordinate. Exclusive. */
    uint32_t y1;
} VdpRect;

/**
 * A constant RGBA color.
 *
 * Note that the components are stored as float values in the
 * range 0.0...1.0 rather than format-specific integer values.
 * This allows VdpColor values to be independent from the exact
 * surface format(s) in use.
 */
typedef struct {
    float red;
    float green;
    float blue;
    float alpha;
} VdpColor;

/** @} */

/**
 * \defgroup error_handling Error Handling
 *
 * @{
 */

/**
 * \hideinitializer
 * \brief The set of all possible error codes.
 */
typedef enum {
    /** The operation completed successfully; no error. */
    VDP_STATUS_OK = 0,
    /**
     * No backend implementation could be loaded.
     */
    VDP_STATUS_NO_IMPLEMENTATION,
    /**
     * The display was preempted, or a fatal error occurred.
     *
     * The application must re-initialize VDPAU.
     */
    VDP_STATUS_DISPLAY_PREEMPTED,
    /**
     * An invalid handle value was provided.
     *
     * Either the handle does not exist at all, or refers to an object of an
     * incorrect type.
     */
    VDP_STATUS_INVALID_HANDLE,
    /**
     * An invalid pointer was provided.
     *
     * Typically, this means that a NULL pointer was provided for an "output"
     * parameter.
     */
    VDP_STATUS_INVALID_POINTER,
    /**
     * An invalid/unsupported \ref VdpChromaType value was supplied.
     */
    VDP_STATUS_INVALID_CHROMA_TYPE,
    /**
     * An invalid/unsupported \ref VdpYCbCrFormat value was supplied.
     */
    VDP_STATUS_INVALID_Y_CB_CR_FORMAT,
    /**
     * An invalid/unsupported \ref VdpRGBAFormat value was supplied.
     */
    VDP_STATUS_INVALID_RGBA_FORMAT,
    /**
     * An invalid/unsupported \ref VdpIndexedFormat value was supplied.
     */
    VDP_STATUS_INVALID_INDEXED_FORMAT,
    /**
     * An invalid/unsupported \ref VdpColorStandard value was supplied.
     */
    VDP_STATUS_INVALID_COLOR_STANDARD,
    /**
     * An invalid/unsupported \ref VdpColorTableFormat value was supplied.
     */
    VDP_STATUS_INVALID_COLOR_TABLE_FORMAT,
    /**
     * An invalid/unsupported \ref VdpOutputSurfaceRenderBlendFactor value was
     * supplied.
     */
    VDP_STATUS_INVALID_BLEND_FACTOR,
    /**
     * An invalid/unsupported \ref VdpOutputSurfaceRenderBlendEquation value
     * was supplied.
     */
    VDP_STATUS_INVALID_BLEND_EQUATION,
    /**
     * An invalid/unsupported flag value/combination was supplied.
     */
    VDP_STATUS_INVALID_FLAG,
    /**
     * An invalid/unsupported \ref VdpDecoderProfile value was supplied.
     */
    VDP_STATUS_INVALID_DECODER_PROFILE,
    /**
     * An invalid/unsupported \ref VdpVideoMixerFeature value was supplied.
     */
    VDP_STATUS_INVALID_VIDEO_MIXER_FEATURE,
    /**
     * An invalid/unsupported \ref VdpVideoMixerParameter value was supplied.
     */
    VDP_STATUS_INVALID_VIDEO_MIXER_PARAMETER,
    /**
     * An invalid/unsupported \ref VdpVideoMixerAttribute value was supplied.
     */
    VDP_STATUS_INVALID_VIDEO_MIXER_ATTRIBUTE,
    /**
     * An invalid/unsupported \ref VdpVideoMixerPictureStructure value was
     * supplied.
     */
    VDP_STATUS_INVALID_VIDEO_MIXER_PICTURE_STRUCTURE,
    /**
     * An invalid/unsupported \ref VdpFuncId value was supplied.
     */
    VDP_STATUS_INVALID_FUNC_ID,
    /**
     * The size of a supplied object does not match the object it is being
     * used with.
     *
     * For example, a \ref VdpVideoMixer "VdpVideoMixer" is configured to
     * process \ref VdpVideoSurface "VdpVideoSurface" objects of a specific
     * size. If presented with a \ref VdpVideoSurface "VdpVideoSurface" of a
     * different size, this error will be raised.
     */
    VDP_STATUS_INVALID_SIZE,
    /**
     * An invalid/unsupported value was supplied.
     *
     * This is a catch-all error code for values of type other than those
     * with a specific error code.
     */
    VDP_STATUS_INVALID_VALUE,
    /**
     * An invalid/unsupported structure version was specified in a versioned
     * structure. This implies that the implementation is older than the
     * header file the application was built against.
     */
    VDP_STATUS_INVALID_STRUCT_VERSION,
    /**
     * The system does not have enough resources to complete the requested
     * operation at this time.
     */
    VDP_STATUS_RESOURCES,
    /**
     * The set of handles supplied are not all related to the same VdpDevice.
     *
     * When performing operations that operate on multiple surfaces, such as
     * \ref  VdpOutputSurfaceRenderOutputSurface or \ref VdpVideoMixerRender,
     * all supplied surfaces must have been created within the context of the
     * same \ref VdpDevice "VdpDevice" object. This error is raised if they were
     * not.
     */
    VDP_STATUS_HANDLE_DEVICE_MISMATCH,
    /**
     * A catch-all error, used when no other error code applies.
     */
    VDP_STATUS_ERROR,
} VdpStatus;

/**
 * \brief Retrieve a string describing an error code.
 * \param[in] status The error code.
 * \return A pointer to the string. Note that this is a
 *       statically allocated read-only string. As such, the
 *       application must not free the returned pointer. The
 *       pointer is valid as long as the VDPAU implementation is
 *       present within the application's address space.
 */
typedef char const * VdpGetErrorString(
    VdpStatus status
);

/** @} */

/**
 * \defgroup versioning Versioning
 *
 *
 * @{
 */

/**
 * \brief The VDPAU interface version described by this header file.
 *
 * This version will only increase if a major incompatible change is made.
 * For example, if the parameters passed to an existing function are modified,
 * rather than simply adding new functions/enumerations), or if the mechanism
 * used to load the backend driver is modified incompatibly. Such changes are
 * unlikely.
 *
 * This value also represents the DSO version of VDPAU-related
 * shared-libraries.
 *
 * VDPAU version numbers are simple integers that increase monotonically
 * (typically by value 1).
 */
#define VDPAU_INTERFACE_VERSION 1

/**
 * \brief The VDPAU version described by this header file.
 *
 * This version will increase whenever any non-documentation change is made to
 * vdpau.h, or related header files such as vdpau_x11.h. Such changes
 * typically involve the addition of new functions, constants, or features.
 * Such changes are expected to be completely backwards-compatible.
 *
 * VDPAU version numbers are simple integers that increase monotonically
 * (typically by value 1).
 */
#define VDPAU_VERSION 1

/**
 * \brief Retrieve the VDPAU version implemented by the backend.
 * \param[out] api_version The API version.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpGetApiVersion(
    /* output parameters follow */
    uint32_t * api_version
);

/**
 * \brief Retrieve an implementation-specific string description
 *        of the implementation. This typically includes detailed version
 *        information.
 * \param[out] information_string A pointer to the information
 *       string. Note that this is a statically allocated
 *       read-only string. As such, the application must not
 *       free the returned pointer. The pointer is valid as long
 *       as the implementation is present within the
 *       application's address space.
 * \return VdpStatus The completion status of the operation.
 *
 * Note that the returned string is useful for information
 * reporting. It is not intended that the application should
 * parse this string in order to determine any information about
 * the implementation.
 */
typedef VdpStatus VdpGetInformationString(
    /* output parameters follow */
    char const * * information_string
);

/** @} */

/**
 * \defgroup VdpDevice VdpDevice; Primary API object
 *
 * The VdpDevice is the root of the VDPAU object system. Using a
 * VdpDevice object, all other object types may be created. See
 * the sections describing those other object types for details
 * on object creation.
 *
 * Note that VdpDevice objects are created using the \ref
 * api_winsys.
 *
 * @{
 */

/**
 * \brief  An opaque handle representing a VdpDevice object.
 */
typedef uint32_t VdpDevice;

/**
 * \brief Destroy a VdpDevice.
 * \param[in] device The device to destroy.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpDeviceDestroy(
    VdpDevice device
);

/** @} */

/**
 * \defgroup VdpCSCMatrix VdpCSCMatrix; CSC Matrix Manipulation
 *
 * When converting from YCbCr to RGB data formats, a color space
 * conversion operation must be performed. This operation is
 * parameterized using a "color space conversion matrix". The
 * VdpCSCMatrix is a data structure representing this
 * information.
 *
 * @{
 */

/**
 * \brief Storage for a color space conversion matrix.
 *
 * Note that the application may choose to construct the matrix
 * content by either:
 * - Directly filling in the fields of the CSC matrix
 * - Using the \ref VdpGenerateCSCMatrix helper function.
 *
 * The color space conversion equation is as follows:
 *
 * \f[
 * \left( \begin{array}{c} R \\ G \\ B \end{array} \right)
 * =
 * \left( \begin{array}{cccc}
 * m_{0,0} & m_{0,1} & m_{0,2} & m_{0,3} \\
 * m_{1,0} & m_{1,1} & m_{1,2} & m_{1,3} \\
 * m_{2,0} & m_{2,1} & m_{2,2} & m_{2,3}
 * \end{array}
 * \right)
 * *
 * \left( \begin{array}{c} Y \\ Cb \\ Cr \\ 1.0 \end{array}
 *      \right)
 * \f]
 */
typedef float VdpCSCMatrix[3][4];

#define VDP_PROCAMP_VERSION 0

/**
 * \brief Procamp operation parameterization data.
 *
 * When performing a color space conversion operation, various
 * adjustments can be performed at the same time, such as
 * brightness and contrast. This structure defines the level of
 * adjustments to make.
 */
typedef struct {
    /**
     * This field must be filled with VDP_PROCAMP_VERSION
     */
    uint32_t struct_version;
    /**
     * Brightness adjustment amount. A value clamped between
     * -1.0 and 1.0. 0.0 represents no modification.
     */
    float brightness;
    /**
     * Contrast adjustment amount. A value clamped between
     * 0.0 and 10.0. 1.0 represents no modification.
     */
    float contrast;
    /**
     * Saturation adjustment amount. A value clamped between 0.0 and
     * 10.0. 1.0 represents no modification.
     */
    float saturation;
    /**
     * Hue adjustment amount. A value clamped between
     * -PI and PI. 0.0 represents no modification.
     */
    float hue;
} VdpProcamp;

/**
 * \brief YCbCr color space specification.
 *
 * A number of YCbCr color spaces exist. This enumeration
 * defines the specifications known to VDPAU.
 */
typedef uint32_t VdpColorStandard;

/** \hideinitializer \brief ITU-R BT.601 */
#define VDP_COLOR_STANDARD_ITUR_BT_601 ((VdpColorStandard)0)
/** \hideinitializer \brief ITU-R BT.709 */
#define VDP_COLOR_STANDARD_ITUR_BT_709 ((VdpColorStandard)1)
/** \hideinitializer \brief SMPTE-240M */
#define VDP_COLOR_STANDARD_SMPTE_240M  ((VdpColorStandard)2)

/**
 * \brief Generate a color space conversion matrix
 * \param[in] procamp The procamp adjustments to make. If NULL,
 *        no adjustments will be made.
 * \param[in] standard The YCbCr color space to convert from.
 * \param[out] csc_matrix The CSC matrix to initialize.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpGenerateCSCMatrix(
    VdpProcamp *     procamp,
    VdpColorStandard standard,
    /* output parameters follow */
    VdpCSCMatrix *   csc_matrix
);

/** @} */

/**
 * \defgroup VdpVideoSurface VdpVideoSurface; Video Surface object
 *
 * A VdpVideoSurface stores YCbCr data in an internal format,
 * with a variety of possible chroma sub-sampling options.
 *
 * A VdpVideoSurface may be filled with:
 * - Data provided by the CPU via \ref
 *   VdpVideoSurfacePutBitsYCbCr (i.e. software decode.)
 * - The result of applying a \ref VdpDecoder "VdpDecoder" to
 *   compressed video data.
 *
 * VdpVideoSurface content may be accessed by:
 * - The application via \ref VdpVideoSurfaceGetBitsYCbCr
 * - The Hardware that implements \ref VdpOutputSurface
 *   "VdpOutputSurface" \ref VdpOutputSurfaceRender
 *   "rendering functionality".
 * - The Hardware the implements \ref VdpVideoMixer
 *   "VdpVideoMixer" functionality.
 *
 * VdpVideoSurfaces are not directly displayable. They must be
 * converted into a displayable format using \ref VdpVideoMixer
 * "VdpVideoMixer" objects.
 *
 * See \ref video_mixer_usage for additional information.
 *
 * @{
 */

/**
 * \brief Query the implementation's VdpVideoSurface
 *        capabilities.
 * \param[in] device The device to query.
 * \param[in] surface_chroma_type The type of chroma type for
 *       which information is requested.
 * \param[out] is_supported Is this chroma type supported?
 * \param[out] max_width The maximum supported surface width for
 *       this chroma type.
 * \param[out] max_height The maximum supported surface height
 *       for this chroma type.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoSurfaceQueryCapabilities(
    VdpDevice     device,
    VdpChromaType surface_chroma_type,
    /* output parameters follow */
    VdpBool *     is_supported,
    uint32_t *    max_width,
    uint32_t *    max_height
);

/**
 * \brief Query the implementation's VdpVideoSurface
 *        GetBits/PutBits capabilities.
 * \param[in] device The device to query.
 * \param[in] surface_chroma_type The type of chroma type for
 *       which information is requested.
 * \param[in] bits_ycbcr_format The format of application "bits"
 *       buffer for which information is requested.
 * \param[out] is_supported Is this chroma type supported?
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoSurfaceQueryGetPutBitsYCbCrCapabilities(
    VdpDevice      device,
    VdpChromaType  surface_chroma_type,
    VdpYCbCrFormat bits_ycbcr_format,
    /* output parameters follow */
    VdpBool *      is_supported
);

/**
 * \brief An opaque handle representing a VdpVideoSurface
 *        object.
 */
typedef uint32_t VdpVideoSurface;

/**
 * \brief Create a VdpVideoSurface.
 * \param[in] device The device that will contain the surface.
 * \param[in] chroma_type The chroma type of the new surface.
 * \param[in] width The width of the new surface.
 * \param[in] height The height of the new surface.
 * \param[out] surface The new surface's handle.
 * \return VdpStatus The completion status of the operation.
 *
 * The memory backing the surface may not be initialized during
 * creation. Applications are expected to initialize any region
 * that they use, via \ref VdpDecoderRender or \ref
 * VdpVideoSurfacePutBitsYCbCr.
 *
 * Note that certain widths/heights are impossible for specific values of
 * chroma_type. For example, the definition of VDP_CHROMA_TYPE_420 implies
 * that the width must be even, since each single chroma sample covers two
 * luma samples horizontally. A similar argument applies to surface heights,
 * although doubly so, since interlaced pictures must be supported; each
 * field's height must itself be a multiple of 2. Hence the overall surface's
 * height must be a multiple of 4.
 *
 * Similar rules apply to other chroma_type values.
 *
 * Implementations may also impose additional restrictions on the surface
 * sizes they support, potentially requiring additional rounding of actual
 * surface sizes.
 *
 * In most cases, this is not an issue, since:
 * - Video streams are encoded as an array of macro-blocks, which typically
 *   have larger size alignment requirements than video surfaces do.
 * - APIs such as \ref VdpVideoMixerRender allow specification of a sub-region
 *   of the surface to read, which allows the padding data to be clipped away.
 *
 * However, other APIs such as \ref VdpVideoSurfaceGetBitsYCbCr and
 * \ref VdpVideoSurfacePutBitsYCbCr do not allow a sub-region to be specified,
 * and always operate on surface size that was actually allocated, rather
 * than the surface size that was requested. In this case, applications need
 * to be aware of the actual surface size, in order to allocate appropriately
 * sized buffers for the get-/put-bits operations.
 *
 * For this reason, applications may need to call
 * \ref VdpVideoSurfaceGetParameters after creation, in order to retrieve the
 * actual surface size.
 */
typedef VdpStatus VdpVideoSurfaceCreate(
    VdpDevice         device,
    VdpChromaType     chroma_type,
    uint32_t          width,
    uint32_t          height,
    /* output parameters follow */
    VdpVideoSurface * surface
);

/**
 * \brief Destroy a VdpVideoSurface.
 * \param[in] surface The surface's handle.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoSurfaceDestroy(
    VdpVideoSurface surface
);

/**
 * \brief Retrieve the parameters used to create a
 *        VdpVideoSurface.
 * \param[in] surface The surface's handle.
 * \param[out] chroma_type The chroma type of the surface.
 * \param[out] width The width of the surface.
 * \param[out] height The height of the surface.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoSurfaceGetParameters(
    VdpVideoSurface surface,
    /* output parameters follow */
    VdpChromaType * chroma_type,
    uint32_t *      width,
    uint32_t *      height
);

/**
 * \brief Copy image data from a VdpVideoSurface to application
 *        memory in a specified YCbCr format.
 * \param[in] surface The surface's handle.
 * \param[in] destination_ycbcr_format The format of the
 *       application's data buffers.
 * \param[in] destination_data Pointers to the application data
 *       buffers into which the image data will be written. Note
 *       that this is an array of pointers, one per plane. The
 *       destination_format parameter will define how many
 *       planes are required.
 * \param[in] destination_pitches Pointers to the pitch values
 *       for the application data buffers. Note that this is an
 *       array of pointers, one per plane. The
 *       destination_format parameter will define how many
 *       planes are required.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoSurfaceGetBitsYCbCr(
    VdpVideoSurface  surface,
    VdpYCbCrFormat   destination_ycbcr_format,
    void * const *   destination_data,
    uint32_t const * destination_pitches
);

/**
 * \brief Copy image data from application memory in a specific
 *        YCbCr format to a VdpVideoSurface.
 * \param[in] surface The surface's handle.
 * \param[in] source_ycbcr_format The format of the
 *       application's data buffers.
 * \param[in] source_data Pointers to the application data
 *       buffers from which the image data will be copied. Note
 *       that this is an array of pointers, one per plane. The
 *       source_format parameter will define how many
 *       planes are required.
 * \param[in] source_pitches Pointers to the pitch values
 *       for the application data buffers. Note that this is an
 *       array of pointers, one per plane. The
 *       source_format parameter will define how many
 *       planes are required.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoSurfacePutBitsYCbCr(
    VdpVideoSurface      surface,
    VdpYCbCrFormat       source_ycbcr_format,
    void const * const * source_data,
    uint32_t const *     source_pitches
);

/** @} */

/**
 * \defgroup VdpOutputSurface VdpOutputSurface; Output Surface object
 *
 * A VdpOutputSurface stores RGBA data in a defined format.
 *
 * A VdpOutputSurface may be filled with:
 * - Data provided by the CPU via the various
 *   VdpOutputSurfacePutBits functions.
 * - Using the VdpOutputSurface \ref VdpOutputSurfaceRender
 *   "rendering functionality".
 * - Using a \ref VdpVideoMixer "VdpVideoMixer" object.
 *
 * VdpOutputSurface content may be accessed by:
 * - The application via the various VdpOutputSurfaceGetBits
 *   functions.
 * - The Hardware that implements VdpOutputSurface
 *   \ref VdpOutputSurfaceRender "rendering functionality".
 * - The Hardware the implements \ref VdpVideoMixer
 *   "VdpVideoMixer" functionality.
 * - The Hardware that implements \ref VdpPresentationQueue
 *   "VdpPresentationQueue" functionality,
 *
 * VdpOutputSurfaces are directly displayable using a \ref
 * VdpPresentationQueue "VdpPresentationQueue" object.
 *
 * @{
 */

/**
 * \brief The set of all known color table formats, for use with
 * \ref VdpOutputSurfacePutBitsIndexed.
 */
typedef uint32_t VdpColorTableFormat;

/**
 * \hideinitializer
 * \brief 8-bit per component packed into 32-bits
 *
 * This format is an array of packed 32-bit RGB color values.
 * Bits [31:24] are unused, bits [23:16] contain R, bits [15:8]
 * contain G, and bits [7:0] contain B. Note: The format is
 * physically an array of uint32_t values, and should be accessed
 * as such by the application in order to avoid endianness
 * issues.
 */
#define VDP_COLOR_TABLE_FORMAT_B8G8R8X8 ((VdpColorTableFormat)0)

/**
 * \brief Query the implementation's VdpOutputSurface
 *        capabilities.
 * \param[in] device The device to query.
 * \param[in] surface_rgba_format The surface format for
 *       which information is requested.
 * \param[out] is_supported Is this surface format supported?
 * \param[out] max_width The maximum supported surface width for
 *       this chroma type.
 * \param[out] max_height The maximum supported surface height
 *       for this chroma type.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfaceQueryCapabilities(
    VdpDevice     device,
    VdpRGBAFormat surface_rgba_format,
    /* output parameters follow */
    VdpBool *     is_supported,
    uint32_t *    max_width,
    uint32_t *    max_height
);

/**
 * \brief Query the implementation's capability to perform a
 *        PutBits operation using application data matching the
 *        surface's format.
 * \param[in] device The device to query.
 * \param[in] surface_rgba_format The surface format for
 *       which information is requested.
 * \param[out] is_supported Is this surface format supported?
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfaceQueryGetPutBitsNativeCapabilities(
    VdpDevice     device,
    VdpRGBAFormat surface_rgba_format,
    /* output parameters follow */
    VdpBool *     is_supported
);

/**
 * \brief Query the implementation's capability to perform a
 *        PutBits operation using application data in a specific
 *        indexed format.
 * \param[in] device The device to query.
 * \param[in] surface_rgba_format The surface format for
 *       which information is requested.
 * \param[in] bits_indexed_format The format of the application
 *       data buffer.
 * \param[in] color_table_format The format of the color lookup
 *       table.
 * \param[out] is_supported Is this surface format supported?
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfaceQueryPutBitsIndexedCapabilities(
    VdpDevice           device,
    VdpRGBAFormat       surface_rgba_format,
    VdpIndexedFormat    bits_indexed_format,
    VdpColorTableFormat color_table_format,
    /* output parameters follow */
    VdpBool *           is_supported
);

/**
 * \brief Query the implementation's capability to perform a
 *        PutBits operation using application data in a specific
 *        YCbCr/YUB format.
 * \param[in] device The device to query.
 * \param[in] surface_rgba_format The surface format for which
 *       information is requested.
 * \param[in] bits_ycbcr_format The format of the application
 *       data buffer.
 * \param[out] is_supported Is this surface format supported?
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfaceQueryPutBitsYCbCrCapabilities(
    VdpDevice      device,
    VdpRGBAFormat  surface_rgba_format,
    VdpYCbCrFormat bits_ycbcr_format,
    /* output parameters follow */
    VdpBool *      is_supported
);

/**
 * \brief An opaque handle representing a VdpOutputSurface
 *        object.
 */
typedef uint32_t VdpOutputSurface;

/**
 * \brief Create a VdpOutputSurface.
 * \param[in] device The device that will contain the surface.
 * \param[in] rgba_format The format of the new surface.
 * \param[in] width The width of the new surface.
 * \param[in] height The height of the new surface.
 * \param[out] surface The new surface's handle.
 * \return VdpStatus The completion status of the operation.
 *
 * The memory backing the surface will be initialized to 0 color
 * and 0 alpha (i.e. black.)
 */
typedef VdpStatus VdpOutputSurfaceCreate(
    VdpDevice          device,
    VdpRGBAFormat      rgba_format,
    uint32_t           width,
    uint32_t           height,
    /* output parameters follow */
    VdpOutputSurface * surface
);

/**
 * \brief Destroy a VdpOutputSurface.
 * \param[in] surface The surface's handle.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfaceDestroy(
    VdpOutputSurface surface
);

/**
 * \brief Retrieve the parameters used to create a
 *        VdpOutputSurface.
 * \param[in] surface The surface's handle.
 * \param[out] rgba_format The format of the surface.
 * \param[out] width The width of the surface.
 * \param[out] height The height of the surface.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfaceGetParameters(
    VdpOutputSurface surface,
    /* output parameters follow */
    VdpRGBAFormat *  rgba_format,
    uint32_t *       width,
    uint32_t *       height
);

/**
 * \brief Copy image data from a VdpOutputSurface to application
 *        memory in the surface's native format.
 * \param[in] surface The surface's handle.
 * \param[in] source_rect The sub-rectangle of the source
 *       surface to copy. If NULL, the entire surface will be
 *       retrieved.
 * \param[in] destination_data Pointers to the application data
 *       buffers into which the image data will be written. Note
 *       that this is an array of pointers, one per plane. The
 *       destination_format parameter will define how many
 *       planes are required.
 * \param[in] destination_pitches Pointers to the pitch values
 *       for the application data buffers. Note that this is an
 *       array of pointers, one per plane. The
 *       destination_format parameter will define how many
 *       planes are required.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfaceGetBitsNative(
    VdpOutputSurface surface,
    VdpRect const *  source_rect,
    void * const *   destination_data,
    uint32_t const * destination_pitches
);

/**
 * \brief Copy image data from application memory in the
 *        surface's native format to a VdpOutputSurface.
 * \param[in] surface The surface's handle.
 * \param[in] source_data Pointers to the application data
 *       buffers from which the image data will be copied. Note
 *       that this is an array of pointers, one per plane. The
 *       source_format parameter will define how many
 *       planes are required.
 * \param[in] source_pitches Pointers to the pitch values
 *       for the application data buffers. Note that this is an
 *       array of pointers, one per plane. The
 *       source_format parameter will define how many
 *       planes are required.
 * \param[in] destination_rect The sub-rectangle of the surface
 *       to fill with application data. If NULL, the entire
 *       surface will be updated.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfacePutBitsNative(
    VdpOutputSurface     surface,
    void const * const * source_data,
    uint32_t const *     source_pitches,
    VdpRect const *      destination_rect
);

/**
 * \brief Copy image data from application memory in a specific
 *        indexed format to a VdpOutputSurface.
 * \param[in] surface The surface's handle.
 * \param[in] source_indexed_format The format of the
 *       application's data buffers.
 * \param[in] source_data Pointers to the application data
 *       buffers from which the image data will be copied. Note
 *       that this is an array of pointers, one per plane. The
 *       source_indexed_format parameter will define how many
 *       planes are required.
 * \param[in] source_pitches Pointers to the pitch values
 *       for the application data buffers. Note that this is an
 *       array of pointers, one per plane. The
 *       source_indexed_format parameter will define how many
 *       planes are required.
 * \param[in] destination_rect The sub-rectangle of the surface
 *       to fill with application data. If NULL, the entire
 *       surface will be updated.
 * \param[in] color_table_format The format of the color_table.
 * \param[in] color_table A table that maps between source index
 *       and target color data. See \ref VdpColorTableFormat for
 *       details regarding the memory layout.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfacePutBitsIndexed(
    VdpOutputSurface     surface,
    VdpIndexedFormat     source_indexed_format,
    void const * const * source_data,
    uint32_t const *     source_pitch,
    VdpRect const *      destination_rect,
    VdpColorTableFormat  color_table_format,
    void const *         color_table
);

/**
 * \brief Copy image data from application memory in a specific
 *        YCbCr format to a VdpOutputSurface.
 * \param[in] surface The surface's handle.
 * \param[in] source_ycbcr_format The format of the
 *       application's data buffers.
 * \param[in] source_data Pointers to the application data
 *       buffers from which the image data will be copied. Note
 *       that this is an array of pointers, one per plane. The
 *       source_ycbcr_format parameter will define how many
 *       planes are required.
 * \param[in] source_pitches Pointers to the pitch values
 *       for the application data buffers. Note that this is an
 *       array of pointers, one per plane. The
 *       source_ycbcr_format parameter will define how many
 *       planes are required.
 * \param[in] destination_rect The sub-rectangle of the surface
 *       to fill with application data. If NULL, the entire
 *       surface will be updated.
 * \param[in] csc_matrix The color space conversion matrix used
 *       by the copy operation. If NULL, a default matrix will
 *       be used internally. Th default matrix is equivalent to
 *       ITU-R BT.601 with no procamp changes.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpOutputSurfacePutBitsYCbCr(
    VdpOutputSurface     surface,
    VdpYCbCrFormat       source_ycbcr_format,
    void const * const * source_data,
    uint32_t const *     source_pitches,
    VdpRect const *      destination_rect,
    VdpCSCMatrix const * csc_matrix
);

/** @} */

/**
 * \defgroup VdpBitmapSurface VdpBitmapSurface; Bitmap Surface object
 *
 * A VdpBitmapSurface stores RGBA data in a defined format.
 *
 * A VdpBitmapSurface may be filled with:
 * - Data provided by the CPU via the \ref
 *   VdpBitmapSurfacePutBitsNative function.
 *
 * VdpBitmapSurface content may be accessed by:
 * - The Hardware that implements \ref VdpOutputSurface
 *   "VdpOutputSurface" \ref VdpOutputSurfaceRender
 *   "rendering functionality"
 *
 * VdpBitmapSurface objects are intended to store static read-only data, such
 * as font glyphs, and the bitmaps used to compose an applications'
 * user-interface.
 *
 * The primary differences between VdpBitmapSurfaces and
 * \ref VdpOutputSurface "VdpOutputSurface"s are:
 *
 * - You cannot render to a VdpBitmapSurface, just upload native data via
 *   the PutBits API.
 *
 * - The read-only nature of a VdpBitmapSurface gives the implementation more
 *   flexibility in its choice of data storage location for the bitmap data.
 *   For example, some implementations may choose to store some/all
 *   VdpBitmapSurface objects in system memory to relieve GPU memory pressure.
 *
 * - VdpBitmapSurface and VdpOutputSurface may support different subsets of all
 *   known RGBA formats.
 *
 * @{
 */

/**
 * \brief Query the implementation's VdpBitmapSurface
 *        capabilities.
 * \param[in] device The device to query.
 * \param[in] surface_rgba_format The surface format for
 *       which information is requested.
 * \param[out] is_supported Is this surface format supported?
 * \param[out] max_width The maximum supported surface width for
 *       this chroma type.
 * \param[out] max_height The maximum supported surface height
 *       for this chroma type.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpBitmapSurfaceQueryCapabilities(
    VdpDevice     device,
    VdpRGBAFormat surface_rgba_format,
    /* output parameters follow */
    VdpBool *     is_supported,
    uint32_t *    max_width,
    uint32_t *    max_height
);

/**
 * \brief An opaque handle representing a VdpBitmapSurface
 *        object.
 */
typedef uint32_t VdpBitmapSurface;

/**
 * \brief Create a VdpBitmapSurface.
 * \param[in] device The device that will contain the surface.
 * \param[in] rgba_format The format of the new surface.
 * \param[in] width The width of the new surface.
 * \param[in] height The height of the new surface.
 * \param[in] frequently_accessed Is this bitmap used
 *       frequently, or infrequently, by compositing options?
 *       Implementations may use this as a hint to determine how
 *       to allocate the underlying storage for the surface.
 * \param[out] surface The new surface's handle.
 * \return VdpStatus The completion status of the operation.
 *
 * The memory backing the surface may not be initialized
 * during creation. Applications are expected initialize any
 * region that they use, via \ref VdpBitmapSurfacePutBitsNative.
 */
typedef VdpStatus VdpBitmapSurfaceCreate(
    VdpDevice          device,
    VdpRGBAFormat      rgba_format,
    uint32_t           width,
    uint32_t           height,
    VdpBool            frequently_accessed,
    /* output parameters follow */
    VdpBitmapSurface * surface
);

/**
 * \brief Destroy a VdpBitmapSurface.
 * \param[in] surface The surface's handle.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpBitmapSurfaceDestroy(
    VdpBitmapSurface surface
);

/**
 * \brief Retrieve the parameters used to create a
 *        VdpBitmapSurface.
 * \param[in] surface The surface's handle.
 * \param[out] rgba_format The format of the surface.
 * \param[out] width The width of the surface.
 * \param[out] height The height of the surface.
 * \param[out] frequently_accessed The frequently_accessed state
 *       of the surface.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpBitmapSurfaceGetParameters(
    VdpBitmapSurface surface,
    /* output parameters follow */
    VdpRGBAFormat *  rgba_format,
    uint32_t *       width,
    uint32_t *       height,
    VdpBool *        frequently_accessed
);

/**
 * \brief Copy image data from application memory in the
 *        surface's native format to a VdpBitmapSurface.
 * \param[in] surface The surface's handle.
 * \param[in] source_data Pointers to the application data
 *       buffers from which the image data will be copied. Note
 *       that this is an array of pointers, one per plane. The
 *       source_format parameter will define how many
 *       planes are required.
 * \param[in] source_pitches Pointers to the pitch values
 *       for the application data buffers. Note that this is an
 *       array of pointers, one per plane. The
 *       source_format parameter will define how many
 *       planes are required.
 * \param[in] destination_rect The sub-rectangle of the surface
 *       to fill with application data. If NULL, the entire
 *       surface will be updated.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpBitmapSurfacePutBitsNative(
    VdpBitmapSurface     surface,
    void const * const * source_data,
    uint32_t const *     source_pitches,
    VdpRect const *      destination_rect
);

/** @} */

/**
 * \defgroup VdpOutputSurfaceRender VdpOutputSurface Rendering Functionality
 *
 * \ref VdpOutputSurface "VdpOutputSurface" objects
 * directly provide some rendering/compositing operations. These
 * are described below.
 *
 * @{
 */

/**
 * \hideinitializer
 * \brief The blending equation factors.
 */
typedef enum {
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_ZERO                     = 0,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_ONE                      = 1,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_SRC_COLOR                = 2,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_ONE_MINUS_SRC_COLOR      = 3,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_SRC_ALPHA                = 4,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA      = 5,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_DST_ALPHA                = 6,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_ONE_MINUS_DST_ALPHA      = 7,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_DST_COLOR                = 8,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_ONE_MINUS_DST_COLOR      = 9,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_SRC_ALPHA_SATURATE       = 10,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_CONSTANT_COLOR           = 11,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_ONE_MINUS_CONSTANT_COLOR = 12,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_CONSTANT_ALPHA           = 13,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA = 14,
} VdpOutputSurfaceRenderBlendFactor;

/**
 * \hideinitializer
 * \brief The blending equations.
 */
typedef enum {
    VDP_OUTPUT_SURFACE_RENDER_BLEND_EQUATION_SUBTRACT         = 0,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_EQUATION_REVERSE_SUBTRACT = 1,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_EQUATION_ADD              = 2,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_EQUATION_MIN              = 3,
    VDP_OUTPUT_SURFACE_RENDER_BLEND_EQUATION_MAX              = 4,
} VdpOutputSurfaceRenderBlendEquation;

#define VDP_OUTPUT_SURFACE_RENDER_BLEND_STATE_VERSION 0

/**
 * \brief Complete blending operation definition.
 *
 * A "blend state" operation controls the math behind certain rendering
 * operations.
 *
 * The blend math is the familiar OpenGL blend math:
 *     \f[
 *     dst.a = equation(blendFactorDstAlpha*dst.a,
 *     blendFactorSrcAlpha*src.a);
 *     \f]
 *     \f[
 *     dst.rgb = equation(blendFactorDstColor*dst.rgb,
 *     blendFactorSrcColor*src.rgb);
 *     \f]
 *
 * Note that when equation is MIN or MAX, the blend factors and constants
 * are ignored, and are treated as if they were 1.0.
 */
typedef struct {
    /**
     * This field must be filled with VDP_OUTPUT_SURFACE_RENDER_BLEND_STATE_VERSIION
     */
    uint32_t struct_version;
    VdpOutputSurfaceRenderBlendFactor   blend_factor_source_color;
    VdpOutputSurfaceRenderBlendFactor   blend_factor_destination_color;
    VdpOutputSurfaceRenderBlendFactor   blend_factor_source_alpha;
    VdpOutputSurfaceRenderBlendFactor   blend_factor_destination_alpha;
    VdpOutputSurfaceRenderBlendEquation blend_equation_color;
    VdpOutputSurfaceRenderBlendEquation blend_equation_alpha;
    VdpColor                            blend_constant;
} VdpOutputSurfaceRenderBlendState;

/**
 * \hideinitializer
 * \brief Do not rotate source_surface prior to compositing.
 */
#define VDP_OUTPUT_SURFACE_RENDER_ROTATE_0   0

/**
 * \hideinitializer
 * \brief Rotate source_surface 90 degrees clockwise prior to
 *        compositing.
 */
#define VDP_OUTPUT_SURFACE_RENDER_ROTATE_90  1

/**
 * \hideinitializer
 * \brief Rotate source_surface 180 degrees prior to
 *        compositing.
 */
#define VDP_OUTPUT_SURFACE_RENDER_ROTATE_180 2

/**
 * \hideinitializer
 * \brief Rotate source_surface 270 degrees clockwise prior to
 *        compositing.
 */
#define VDP_OUTPUT_SURFACE_RENDER_ROTATE_270 3

/**
 * \hideinitializer
 * \brief A separate color is used for each vertex of the
 *        smooth-shaded quad. Hence, colors array contains 4
 *        elements rather than 1. See description of colors
 *        array.
 */
#define VDP_OUTPUT_SURFACE_RENDER_COLOR_PER_VERTEX (1 << 2)

/**
 * \brief Composite a sub-rectangle of a \ref VdpOutputSurface
 *        "VdpOutputSurface" into a sub-rectangle of another
 *        \ref VdpOutputSurface VdpOutputSurface.
 * \param[in] destination_surface The destination surface of the
 *       compositing operation.
 * \param[in] destination_rect The sub-rectangle of the
 *       destination surface to update. If NULL, the entire
 *       destination surface will be updated.
 * \param[in] source_surface The source surface for the
 *       compositing operation. The surface is treated as having
 *       four components: red, green, blue and alpha. Any
 *       missing components are treated as 1.0. For example, for
 *       an A8 VdpOutputSurface, alpha will come from the surface
 *       but red, green and blue will be treated as 1.0. If
 *       source_surface is VDP_INVALID_HANDLE, all components will
 *       be treated as 1.0. Note that destination_surface and
 *       source_surface must have been allocated via the same
 *       \ref VdpDevice "VdpDevice".
 * \param[in] source_rect The sub-rectangle of the source
 *       surface to read from. If NULL, the entire
 *       source_surface will be read. Left/right and/or top/bottom
 *       co-ordinates may be swapped to flip the source. Any
 *       flip occurs prior to any requested rotation. Values
 *       from outside the source surface are valid and samples
 *       at those locations will be taken from the nearest edge.
 * \param[in] colors A pointer to an array of \ref VdpColor
 *      "VdpColor" objects. If the flag
 *      VDP_OUTPUT_SURFACE_RENDER_COLOR_PER_VERTEX is set,
 *      VDPAU will four entries from the array, and treat them
 *      as the colors corresponding to the upper-left,
 *      upper-right, lower-right and lower-left corners of the
 *      post-rotation source (i.e. indices 0, 1, 2 and 3 run
 *      clockwise from the upper left corner). If the flag
 *      VDP_OUTPUT_SURFACE_RENDER_COLOR_PER_VERTEX is not
 *      set, VDPAU will use the single VdpColor for all four
 *      corners. If colors is NULL then red, green, blue and
 *      alpha values of 1.0 will be used.
 * \param[in] blend_state If a blend state is provided, the
 *     blend state will be used for the composite operation. If
 *     NULL, blending is effectively disabled, which is
 *     equivalent to a blend equation of ADD, source blend
 *     factors of ONE and destination blend factors of ZERO.
 *     See \ref VdpOutputSurfaceRenderBlendState for details
 *     regarding the mathematics of the blending operation.
 * \param[in] flags A set of flags influencing how the
 *       compositing operation works.
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_ROTATE_0
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_ROTATE_90
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_ROTATE_180
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_ROTATE_270
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_COLOR_PER_VERTEX
 * \return VdpStatus The completion status of the operation.
 *
 * The general compositing pipeline is as follows.
 *
 * -# Extract source_rect from source_surface.
 *
 * -# The extracted source is rotated 0, 90, 180 or 270 degrees
 *    according to the flags.
 *
 * -# The rotated source is component-wise multiplied by a
 *    smooth-shaded quad with a (potentially) different color at
 *    each vertex.
 *
 * -# The resulting rotated, smooth-shaded quad is scaled to the
 *    size of destination_rect and composited with
 *    destination_surface using the provided blend state.
 *
 */
typedef VdpStatus VdpOutputSurfaceRenderOutputSurface(
    VdpOutputSurface                         destination_surface,
    VdpRect const *                          destination_rect,
    VdpOutputSurface                         source_surface,
    VdpRect const *                          source_rect,
    VdpColor const *                         colors,
    VdpOutputSurfaceRenderBlendState const * blend_state,
    uint32_t                                 flags
);

/**
 * \brief Composite a sub-rectangle of a \ref VdpBitmapSurface
 *        "VdpBitmapSurface" into a sub-rectangle of a
 *        \ref VdpOutputSurface VdpOutputSurface.
 * \param[in] destination_surface The destination surface of the
 *       compositing operation.
 * \param[in] destination_rect The sub-rectangle of the
 *       destination surface to update. If NULL, the entire
 *       destination surface will be updated.
 * \param[in] source_surface The source surface for the
 *       compositing operation. The surface is treated as having
 *       four components: red, green, blue and alpha. Any
 *       missing components are treated as 1.0. For example, for
 *       an A8 VdpBitmapSurface, alpha will come from the surface
 *       but red, green and blue will be treated as 1.0. If
 *       source_surface is VDP_INVALID_HANDLE, all components will
 *       be treated as 1.0. Note that destination_surface and
 *       source_surface must have been allocated via the same
 *       \ref VdpDevice "VdpDevice".
 * \param[in] source_rect The sub-rectangle of the source
 *       surface to read from. If NULL, the entire
 *       source_surface will be read. Left/right ot top/bottom
 *       co-ordinates may be swapped to flip the source. Any
 *       flip occurs prior to any requested rotation. Values
 *       from outside the source surface are valid and samples
 *       at those locations will be taken from the nearest edge.
 * \param[in] colors A pointer to an array of \ref VdpColor
 *      "VdpColor" objects. If the flag
 *      VDP_OUTPUT_SURFACE_RENDER_COLOR_PER_VERTEX is set,
 *      VDPAU will four entries from the array, and treat them
 *      as the colors corresponding to the upper-left,
 *      upper-right, lower-right and lower-left corners of the
 *      post-rotation source (i.e. indices 0, 1, 2 and 3 run
 *      clockwise from the upper left corner). If the flag
 *      VDP_OUTPUT_SURFACE_RENDER_COLOR_PER_VERTEX is not
 *      set, VDPAU will use the single VdpColor for all four
 *      corners. If colors is NULL then red, green, blue and
 *      alpha values of 1.0 will be used.
 * \param[in] blend_state If a blend state is provided, the
 *     blend state will be used for the composite operation. If
 *     NULL, blending is effectively disabled, which is
 *     equivalent to a blend equation of ADD, source blend
 *     factors of ONE and destination blend factors of ZERO.
 *     See \ref VdpOutputSurfaceRenderBlendState for details
 *     regarding the mathematics of the blending operation.
 * \param[in] flags A set of flags influencing how the
 *       compositing operation works.
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_ROTATE_0
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_ROTATE_90
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_ROTATE_180
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_ROTATE_270
 * \arg \ref VDP_OUTPUT_SURFACE_RENDER_COLOR_PER_VERTEX
 * \return VdpStatus The completion status of the operation.
 *
 * The general compositing pipeline is as follows.
 *
 * -# Extract source_rect from source_surface.
 *
 * -# The extracted source is rotated 0, 90, 180 or 270 degrees
 *   according to the flags.
 *
 * -# The rotated source is component-wise multiplied by a
 *    smooth-shaded quad with a (potentially) different color at
 *    each vertex.
 *
 * -# The resulting rotated, smooth-shaded quad is scaled to the
 *    size of destination_rect and composited with
 *    destination_surface using the provided blend state.
 *
 */
typedef VdpStatus VdpOutputSurfaceRenderBitmapSurface(
    VdpOutputSurface                         destination_surface,
    VdpRect const *                          destination_rect,
    VdpBitmapSurface                         source_surface,
    VdpRect const *                          source_rect,
    VdpColor const *                         colors,
    VdpOutputSurfaceRenderBlendState const * blend_state,
    uint32_t                                 flags
);

/** @} */

/**
 * \defgroup VdpDecoder VdpDecoder; Video Decoding object
 *
 * The VdpDecoder object decodes compressed video data, writing
 * the results to a \ref VdpVideoSurface "VdpVideoSurface".
 *
 * A specific VDPAU implementation may support decoding multiple
 * types of compressed video data. However, VdpDecoder objects
 * are able to decode a specific type of compressed video data.
 * This type must be specified during creation.
 *
 * @{
 */

/**
 * \brief The set of all known compressed video formats, and
 *        associated profiles, that may be decoded.
 */
typedef uint32_t VdpDecoderProfile;

/** \hideinitializer */
#define VDP_DECODER_PROFILE_MPEG1                       ((VdpDecoderProfile)0)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_MPEG2_SIMPLE                ((VdpDecoderProfile)1)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_MPEG2_MAIN                  ((VdpDecoderProfile)2)
/** \hideinitializer */
/** \brief MPEG 4 part 10 == H.264 == AVC */
#define VDP_DECODER_PROFILE_H264_BASELINE               ((VdpDecoderProfile)6)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_H264_MAIN                   ((VdpDecoderProfile)7)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_H264_HIGH                   ((VdpDecoderProfile)8)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_VC1_SIMPLE                  ((VdpDecoderProfile)9)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_VC1_MAIN                    ((VdpDecoderProfile)10)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_VC1_ADVANCED                ((VdpDecoderProfile)11)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_MPEG4_PART2_SP              ((VdpDecoderProfile)12)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_MPEG4_PART2_ASP             ((VdpDecoderProfile)13)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_DIVX4_QMOBILE               ((VdpDecoderProfile)14)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_DIVX4_MOBILE                ((VdpDecoderProfile)15)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_DIVX4_HOME_THEATER          ((VdpDecoderProfile)16)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_DIVX4_HD_1080P              ((VdpDecoderProfile)17)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_DIVX5_QMOBILE               ((VdpDecoderProfile)18)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_DIVX5_MOBILE                ((VdpDecoderProfile)19)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_DIVX5_HOME_THEATER          ((VdpDecoderProfile)20)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_DIVX5_HD_1080P              ((VdpDecoderProfile)21)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_H264_CONSTRAINED_BASELINE   ((VdpDecoderProfile)22)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_H264_EXTENDED               ((VdpDecoderProfile)23)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_H264_PROGRESSIVE_HIGH       ((VdpDecoderProfile)24)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_H264_CONSTRAINED_HIGH       ((VdpDecoderProfile)25)
/** \hideinitializer */
/** \brief Support for 8 bit depth only */
#define VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE    ((VdpDecoderProfile)26)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_VP9_PROFILE_0               ((VdpDecoderProfile)27)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_VP9_PROFILE_1               ((VdpDecoderProfile)28)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_VP9_PROFILE_2               ((VdpDecoderProfile)29)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_VP9_PROFILE_3               ((VdpDecoderProfile)30)
/** \hideinitializer */
/** \brief MPEG-H Part 2 == H.265 == HEVC */
#define VDP_DECODER_PROFILE_HEVC_MAIN                   ((VdpDecoderProfile)100)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_HEVC_MAIN_10                ((VdpDecoderProfile)101)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_HEVC_MAIN_STILL             ((VdpDecoderProfile)102)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_HEVC_MAIN_12                ((VdpDecoderProfile)103)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_HEVC_MAIN_444               ((VdpDecoderProfile)104)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_HEVC_MAIN_444_10            ((VdpDecoderProfile)105)
/** \hideinitializer */
#define VDP_DECODER_PROFILE_HEVC_MAIN_444_12            ((VdpDecoderProfile)106)

/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG1_NA 0

/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG2_LL   0
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG2_ML   1
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG2_HL14 2
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG2_HL   3

/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_1     10
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_1b    9
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_1_1   11
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_1_2   12
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_1_3   13
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_2     20
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_2_1   21
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_2_2   22
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_3     30
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_3_1   31
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_3_2   32
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_4     40
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_4_1   41
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_4_2   42
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_5     50
/** \hideinitializer */
#define VDP_DECODER_LEVEL_H264_5_1   51

/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_SIMPLE_LOW    0
/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_SIMPLE_MEDIUM 1

/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_MAIN_LOW    0
/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_MAIN_MEDIUM 1
/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_MAIN_HIGH   2

/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_ADVANCED_L0 0
/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_ADVANCED_L1 1
/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_ADVANCED_L2 2
/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_ADVANCED_L3 3
/** \hideinitializer */
#define VDP_DECODER_LEVEL_VC1_ADVANCED_L4 4

/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_SP_L0 0
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_SP_L1 1
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_SP_L2 2
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_SP_L3 3

/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_ASP_L0 0
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_ASP_L1 1
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_ASP_L2 2
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_ASP_L3 3
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_ASP_L4 4
/** \hideinitializer */
#define VDP_DECODER_LEVEL_MPEG4_PART2_ASP_L5 5

/** \hideinitializer */
#define VDP_DECODER_LEVEL_DIVX_NA 0

/** \hideinitializer */
#define VDP_DECODER_LEVEL_VP9_L1 1

/**
 * The VDPAU H.265/HEVC decoder levels correspond to the values of
 * general_level_idc as described in the H.265 Specification, Annex A,
 * Table A.1. The enumeration values are equal to thirty times the level
 * number.
 */
#define VDP_DECODER_LEVEL_HEVC_1         30
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_2         60
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_2_1       63
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_3         90
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_3_1       93
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_4        120
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_4_1      123
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_5        150
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_5_1      153
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_5_2      156
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_6        180
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_6_1      183
/** \hideinitializer */
#define VDP_DECODER_LEVEL_HEVC_6_2      186

typedef enum {
    VDP_VIDEO_SURFACE_FIELD_STRUCTURE         = (1 << 0),
    VDP_VIDEO_SURFACE_FRAME_STRUCTURE         = (1 << 1)
} VdpVideoSurfaceSupportedPictureStructure;

typedef enum {
    VDP_DECODER_PROFILE_MAX_LEVEL                      = 0,
    VDP_DECODER_PROFILE_MAX_MACROBLOCKS                = 1,
    VDP_DECODER_PROFILE_MAX_WIDTH                      = 2,
    VDP_DECODER_PROFILE_MAX_HEIGHT                     = 3,
    VDP_DECODER_PROFILE_SUPPORTED_PICTURE_STRUCTURE    = 4,
    /**
     * A list of supported chroma types, stored as a bitmask of 1 shifted
     * by each supported VdpChromaType value.  E.g.,
     *   (1 << VDP_CHROMA_TYPE_420) |
     *   (1 << VDP_CHROMA_TYPE_422) |
     *   (1 << VDP_CHROMA_TYPE_444)
     */
    VDP_DECODER_PROFILE_SUPPORTED_CHROMA_TYPES         = 5
} VdpDecoderCapability;

/**
  * \brief Query the supported value of the requested capability, for
  *       the specified profile on the specified device.
  * \param[in] device The device to query.
  * \param[in] profile The decoder profile for which information is requested.
  * \param[in] capability The decoder profile capability for which the value
  *       is requested.
  * \param[out] capability_value The value of the requested capability.
  * \return VdpStatus The completion status of the operation.
  */

typedef VdpStatus VdpDecoderQueryProfileCapability(
    VdpDevice                   device,
    VdpDecoderProfile           profile,
    /* output parameters follow */
    VdpDecoderCapability        capability,
    void *                      capability_value
);

/**
 * \brief Query the implementation's VdpDecoder capabilities.
 * \param[in] device The device to query.
 * \param[in] profile The decoder profile for which information is requested.
 * \param[out] is_supported Is this profile supported?
 * \param[out] max_level The maximum specification level supported for this
 *       profile.
 * \param[out] max_macroblocks The maximum supported surface size in
 *       macroblocks. Note that this could be greater than that dictated by
 *       the maximum level.
 * \param[out] max_width The maximum supported surface width for this profile.
 *       Note that this could be greater than that dictated by the maximum
 *       level.
 * \param[out] max_height The maximum supported surface height for this
 *       profile. Note that this could be greater than that dictated by the
 *       maximum level.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpDecoderQueryCapabilities(
    VdpDevice         device,
    VdpDecoderProfile profile,
    /* output parameters follow */
    VdpBool *         is_supported,
    uint32_t *        max_level,
    uint32_t *        max_macroblocks,
    uint32_t *        max_width,
    uint32_t *        max_height
);

/**
 * \brief An opaque handle representing a VdpDecoder object.
 */
typedef uint32_t VdpDecoder;

/**
 * \brief Create a VdpDecoder.
 * \param[in] device The device that will contain the surface.
 * \param[in] profile The video format the decoder will decode.
 * \param[in] width The width of the new surface.
 * \param[in] height The height of the new surface.
 * \param[in] max_references The maximum number of references that may be
 *       used by a single frame in the stream to be decoded. This parameter
 *       exists mainly for formats such as H.264, where different streams
 *       may use a different number of references. Requesting too many
 *       references may waste memory, but decoding should still operate
 *       correctly. Requesting too few references will cause decoding to
 *       fail.
 * \param[out] decoder The new decoder's handle.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpDecoderCreate(
    VdpDevice         device,
    VdpDecoderProfile profile,
    uint32_t          width,
    uint32_t          height,
    uint32_t          max_references,
    /* output parameters follow */
    VdpDecoder *      decoder
);

/**
 * \brief Destroy a VdpDecoder.
 * \param[in] surface The decoder's handle.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpDecoderDestroy(
    VdpDecoder decoder
);

/**
 * \brief Retrieve the parameters used to create a
 *        VdpDecoder.
 * \param[in] surface The surface's handle.
 * \param[out] profile The video format used to create the
 *       decoder.
 * \param[out] width The width of surfaces decode by the
 *       decoder.
 * \param[out] height The height of surfaces decode by the
 *       decoder
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpDecoderGetParameters(
    VdpDecoder          decoder,
    /* output parameters follow */
    VdpDecoderProfile * profile,
    uint32_t *          width,
    uint32_t *          height
);

#define VDP_BITSTREAM_BUFFER_VERSION 0

/**
 * \brief Application data buffer containing compressed video
 *        data.
 */
typedef struct {
    /**
     * This field must be filled with VDP_BITSTREAM_BUFFER_VERSION
     */
    uint32_t     struct_version;
    /** A pointer to the bitstream data bytes */
    void const * bitstream;
    /** The number of data bytes */
    uint32_t     bitstream_bytes;
} VdpBitstreamBuffer;

/**
 * \brief A generic "picture information" type.
 *
 * This type serves solely to document the expected usage of a
 * generic (void *) function parameter. In actual usage, the
 * application is expected to physically provide a pointer to an
 * instance of one of the "real" VdpPictureInfo* structures,
 * picking the type appropriate for the decoder object in
 * question.
 */
typedef void VdpPictureInfo;

/**
 * \brief Picture parameter information for an MPEG 1 or MPEG 2
 *        picture.
 *
 * Note: References to bitstream fields below may refer to data literally parsed
 * from the bitstream, or derived from the bitstream using a mechanism described
 * in the specification.
 */
typedef struct {
    /**
     * Reference used by B and P frames.
     * Set to VDP_INVALID_HANDLE when not used.
     */
    VdpVideoSurface forward_reference;
    /**
     * Reference used by B frames.
     * Set to VDP_INVALID_HANDLE when not used.
     */
    VdpVideoSurface backward_reference;
    /** Number of slices in the bitstream provided. */
    uint32_t        slice_count;

    /** \name MPEG bitstream
     *
     * Copies of the MPEG bitstream fields.
     * @{ */
    uint8_t picture_structure;
    uint8_t picture_coding_type;
    uint8_t intra_dc_precision;
    uint8_t frame_pred_frame_dct;
    uint8_t concealment_motion_vectors;
    uint8_t intra_vlc_format;
    uint8_t alternate_scan;
    uint8_t q_scale_type;
    uint8_t top_field_first;
    /** MPEG-1 only. For MPEG-2, set to 0. */
    uint8_t full_pel_forward_vector;
    /** MPEG-1 only. For MPEG-2, set to 0. */
    uint8_t full_pel_backward_vector;
    /** For MPEG-1, fill both horizontal and vertical entries. */
    uint8_t f_code[2][2];
    /** Convert to raster order. */
    uint8_t intra_quantizer_matrix[64];
    /** Convert to raster order. */
    uint8_t non_intra_quantizer_matrix[64];
    /** @} */
} VdpPictureInfoMPEG1Or2;

/**
 * \brief Information about an H.264 reference frame
 *
 * Note: References to bitstream fields below may refer to data literally parsed
 * from the bitstream, or derived from the bitstream using a mechanism described
 * in the specification.
 */
typedef struct {
    /**
     * The surface that contains the reference image.
     * Set to VDP_INVALID_HANDLE for unused entries.
     */
    VdpVideoSurface surface;
    /** Is this a long term reference (else short term). */
    VdpBool         is_long_term;
    /**
     * Is the top field used as a reference.
     * Set to VDP_FALSE for unused entries.
     */
    VdpBool         top_is_reference;
    /**
     * Is the bottom field used as a reference.
     * Set to VDP_FALSE for unused entries.
     */
    VdpBool         bottom_is_reference;
    /** [0]: top, [1]: bottom */
    int32_t         field_order_cnt[2];
    /**
     * Copy of the H.264 bitstream field:
     * frame_num from slice_header for short-term references,
     * LongTermPicNum from decoding algorithm for long-term references.
     */
    uint16_t        frame_idx;
} VdpReferenceFrameH264;

/**
 * \brief Picture parameter information for an H.264 picture.
 *
 * Note: The \ref referenceFrames array must contain the "DPB" as
 * defined by the H.264 specification. In particular, once a
 * reference frame has been decoded to a surface, that surface must
 * continue to appear in the DPB until no longer required to predict
 * any future frame. Once a surface is removed from the DPB, it can
 * no longer be used as a reference, unless decoded again.
 *
 * Also note that only surfaces previously generated using \ref
 * VdpDecoderRender may be used as reference frames. In particular,
 * surfaces filled using any "put bits" API will not work.
 *
 * Note: References to bitstream fields below may refer to data literally parsed
 * from the bitstream, or derived from the bitstream using a mechanism described
 * in the specification.
 *
 * Note: VDPAU clients must use VdpPictureInfoH264Predictive to describe the
 * attributes of a frame being decoded with
 * VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE.
 */
typedef struct {
    /** Number of slices in the bitstream provided. */
    uint32_t slice_count;
    /** [0]: top, [1]: bottom */
    int32_t  field_order_cnt[2];
    /** Will the decoded frame be used as a reference later. */
    VdpBool  is_reference;

    /** \name H.264 bitstream
     *
     * Copies of the H.264 bitstream fields.
     * @{ */
    uint16_t frame_num;
    uint8_t  field_pic_flag;
    uint8_t  bottom_field_flag;
    uint8_t  num_ref_frames;
    uint8_t  mb_adaptive_frame_field_flag;
    uint8_t  constrained_intra_pred_flag;
    uint8_t  weighted_pred_flag;
    uint8_t  weighted_bipred_idc;
    uint8_t  frame_mbs_only_flag;
    uint8_t  transform_8x8_mode_flag;
    int8_t   chroma_qp_index_offset;
    int8_t   second_chroma_qp_index_offset;
    int8_t   pic_init_qp_minus26;
    uint8_t  num_ref_idx_l0_active_minus1;
    uint8_t  num_ref_idx_l1_active_minus1;
    uint8_t  log2_max_frame_num_minus4;
    uint8_t  pic_order_cnt_type;
    uint8_t  log2_max_pic_order_cnt_lsb_minus4;
    uint8_t  delta_pic_order_always_zero_flag;
    uint8_t  direct_8x8_inference_flag;
    uint8_t  entropy_coding_mode_flag;
    uint8_t  pic_order_present_flag;
    uint8_t  deblocking_filter_control_present_flag;
    uint8_t  redundant_pic_cnt_present_flag;
    /** Convert to raster order. */
    uint8_t scaling_lists_4x4[6][16];
    /** Convert to raster order. */
    uint8_t scaling_lists_8x8[2][64];
    /** @} */

    /** See \ref VdpPictureInfoH264 for instructions regarding this field. */
    VdpReferenceFrameH264 referenceFrames[16];
} VdpPictureInfoH264;

/**
 * \brief Picture parameter information for an H.264 Hi444PP picture.
 *
 * Note: VDPAU clients must use VdpPictureInfoH264Predictive to describe the
 * attributes of a frame being decoded with
 * VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE.
 *
 * Note: software drivers may choose to honor values of
 * qpprime_y_zero_transform_bypass_flag greater than 1 for internal use.
 */
typedef struct {
    /** \ref VdpPictureInfoH264 struct. */
    VdpPictureInfoH264 pictureInfo;

    /** \name H.264 bitstream
     *
     * Copies of the H.264 bitstream fields.
     * @{ */
    /**
     *  0 - lossless disabled
     *  1 - lossless enabled
     */
    uint8_t qpprime_y_zero_transform_bypass_flag;
    /**
     *  0 - disabled
     *  1 - enabled
     */
    uint8_t separate_colour_plane_flag;
    /** @} */
} VdpPictureInfoH264Predictive;

/**
 * \brief Picture parameter information for a VC1 picture.
 *
 * Note: References to bitstream fields below may refer to data literally parsed
 * from the bitstream, or derived from the bitstream using a mechanism described
 * in the specification.
 */
typedef struct {
    /**
     * Reference used by B and P frames.
     * Set to VDP_INVALID_HANDLE when not used.
     */
    VdpVideoSurface forward_reference;
    /**
     * Reference used by B frames.
     * Set to VDP_INVALID_HANDLE when not used.
     */
    VdpVideoSurface backward_reference;

    /** Number of slices in the bitstream provided. */
    uint32_t slice_count;
    /** I=0, P=1, B=3, BI=4  from 7.1.1.4. */
    uint8_t  picture_type;
    /** Progressive=0, Frame-interlace=2, Field-interlace=3; see VC-1 7.1.1.15. */
    uint8_t  frame_coding_mode;

    /** \name VC-1 bitstream
     *
     * Copies of the VC-1 bitstream fields.
     * @{ */
    /** See VC-1 6.1.5. */
    uint8_t postprocflag;
    /** See VC-1 6.1.8. */
    uint8_t pulldown;
    /** See VC-1 6.1.9. */
    uint8_t interlace;
    /** See VC-1 6.1.10. */
    uint8_t tfcntrflag;
    /** See VC-1 6.1.11. */
    uint8_t finterpflag;
    /** See VC-1 6.1.3. */
    uint8_t psf;
    /** See VC-1 6.2.8. */
    uint8_t dquant;
    /** See VC-1 6.2.3. */
    uint8_t panscan_flag;
    /** See VC-1 6.2.4. */
    uint8_t refdist_flag;
    /** See VC-1 6.2.11. */
    uint8_t quantizer;
    /** See VC-1 6.2.7. */
    uint8_t extended_mv;
    /** See VC-1 6.2.14. */
    uint8_t extended_dmv;
    /** See VC-1 6.2.10. */
    uint8_t overlap;
    /** See VC-1 6.2.9. */
    uint8_t vstransform;
    /** See VC-1 6.2.5. */
    uint8_t loopfilter;
    /** See VC-1 6.2.6. */
    uint8_t fastuvmc;
    /** See VC-1 6.12.15. */
    uint8_t range_mapy_flag;
    uint8_t range_mapy;
    /** See VC-1 6.2.16. */
    uint8_t range_mapuv_flag;
    uint8_t range_mapuv;

    /**
     * See VC-1 J.1.10.
     * Only used by simple and main profiles.
     */
    uint8_t multires;
    /**
     * See VC-1 J.1.16.
     * Only used by simple and main profiles.
     */
    uint8_t syncmarker;
    /**
     * VC-1 SP/MP range reduction control.
     * Only used by simple and main profiles.
     * Bit 0: Copy of rangered VC-1 bitstream field; See VC-1 J.1.17.
     * Bit 1: Copy of rangeredfrm VC-1 bitstream fiels; See VC-1 7.1.13.
     */
    uint8_t rangered;
    /**
     * See VC-1 J.1.17.
     * Only used by simple and main profiles.
     */
    uint8_t maxbframes;
    /** @} */

    /**
     * Out-of-loop deblocking enable.
     * Bit 0 of POSTPROC from VC-1 7.1.1.27
     * Note that bit 1 of POSTPROC (dering enable) should not be included.
     */
    uint8_t deblockEnable;
    /**
     * Parameter used by VC-1 Annex H deblocking algorithm. Note that VDPAU
     * implementations may choose which deblocking algorithm to use.
     * See VC-1 7.1.1.6
     */
    uint8_t pquant;
} VdpPictureInfoVC1;

/**
 * \brief Picture parameter information for an MPEG-4 Part 2 picture.
 *
 * Note: References to bitstream fields below may refer to data literally parsed
 * from the bitstream, or derived from the bitstream using a mechanism described
 * in the specification.
 */
typedef struct {
    /**
     * Reference used by B and P frames.
     * Set to VDP_INVALID_HANDLE when not used.
     */
    VdpVideoSurface forward_reference;
    /**
     * Reference used by B frames.
     * Set to VDP_INVALID_HANDLE when not used.
     */
    VdpVideoSurface backward_reference;

    /** \name MPEG 4 part 2 bitstream
     *
     * Copies of the MPEG 4 part 2 bitstream fields.
     * @{ */
    int32_t trd[2];
    int32_t trb[2];
    uint16_t vop_time_increment_resolution;
    uint8_t vop_coding_type;
    uint8_t vop_fcode_forward;
    uint8_t vop_fcode_backward;
    uint8_t resync_marker_disable;
    uint8_t interlaced;
    uint8_t quant_type;
    uint8_t quarter_sample;
    uint8_t short_video_header;
    /** Derived from vop_rounding_type bitstream field. */
    uint8_t rounding_control;
    uint8_t alternate_vertical_scan_flag;
    uint8_t top_field_first;
    uint8_t intra_quantizer_matrix[64];
    uint8_t non_intra_quantizer_matrix[64];
    /** @} */
} VdpPictureInfoMPEG4Part2;

/**
 * \brief Picture parameter information for a DivX 4 picture.
 *
 * Due to similarites between MPEG-4 Part 2 and DivX 4, the picture
 * parameter structure is re-used.
 */
typedef VdpPictureInfoMPEG4Part2 VdpPictureInfoDivX4;

/**
 * \brief Picture parameter information for a DivX 5 picture.
 *
 * Due to similarites between MPEG-4 Part 2 and DivX 5, the picture
 * parameter structure is re-used.
 */
typedef VdpPictureInfoMPEG4Part2 VdpPictureInfoDivX5;

typedef struct
{
    unsigned int width;
    unsigned int height;

    //Frame Indices
    VdpVideoSurface lastReference;
    VdpVideoSurface goldenReference;
    VdpVideoSurface altReference;

    unsigned char colorSpace;

    unsigned short profile;
    unsigned short frameContextIdx;
    unsigned short keyFrame;
    unsigned short showFrame;
    unsigned short errorResilient;
    unsigned short frameParallelDecoding;
    unsigned short subSamplingX;
    unsigned short subSamplingY;
    unsigned short intraOnly;
    unsigned short allowHighPrecisionMv;
    unsigned short refreshEntropyProbs;

    unsigned char  refFrameSignBias[4];

    unsigned char bitDepthMinus8Luma;
    unsigned char bitDepthMinus8Chroma;
    unsigned char loopFilterLevel;
    unsigned char loopFilterSharpness;

    unsigned char modeRefLfEnabled;
    unsigned char log2TileColumns;
    unsigned char log2TileRows;

    unsigned char segmentEnabled;
    unsigned char segmentMapUpdate;
    unsigned char segmentMapTemporalUpdate;
    unsigned char segmentFeatureMode;

    unsigned char segmentFeatureEnable[8][4];
    short         segmentFeatureData[8][4];
    unsigned char mbSegmentTreeProbs[7];
    unsigned char segmentPredProbs[3];
    unsigned char reservedSegment16Bits[2];

    int qpYAc;
    int qpYDc;
    int qpChDc;
    int qpChAc;

    unsigned int activeRefIdx[3];
    unsigned int resetFrameContext;
    unsigned int mcompFilterType;
    unsigned int mbRefLfDelta[4];
    unsigned int mbModeLfDelta[2];
    unsigned int uncompressedHeaderSize;
    unsigned int compressedHeaderSize;
} VdpPictureInfoVP9;

/**
 * \brief Picture parameter information for an H.265/HEVC picture.
 *
 * References to bitsream fields below may refer to data literally parsed from
 * the bitstream, or derived from the bitstream using a mechanism described in
 * Rec. ITU-T H.265 (04/2013), hereafter referred to as "the H.265/HEVC
 * Specification".
 *
 * VDPAU H.265/HEVC implementations implement the portion of the decoding
 * process described by clauses 8.4, 8.5, 8.6 and 8.7 of the the
 * H.265/HEVC Specification. VdpPictureInfoHEVC provides enough data
 * to complete this portion of the decoding process, plus additional
 * information not defined in the H.265/HEVC Specification that may be
 * useful to particular implementations.
 *
 * Client applications must supply every field in this struct.
 */
typedef struct {
    /** \name HEVC Sequence Parameter Set
     *
     * Copies of the HEVC Sequence Parameter Set bitstream fields.
     * @{ */
    uint8_t chroma_format_idc;
    /** Only valid if chroma_format_idc == 3. Ignored otherwise.*/
    uint8_t separate_colour_plane_flag;
    uint32_t pic_width_in_luma_samples;
    uint32_t pic_height_in_luma_samples;
    uint8_t bit_depth_luma_minus8;
    uint8_t bit_depth_chroma_minus8;
    uint8_t log2_max_pic_order_cnt_lsb_minus4;
    /** Provides the value corresponding to the nuh_temporal_id of the frame
        to be decoded. */
    uint8_t sps_max_dec_pic_buffering_minus1;
    uint8_t log2_min_luma_coding_block_size_minus3;
    uint8_t log2_diff_max_min_luma_coding_block_size;
    uint8_t log2_min_transform_block_size_minus2;
    uint8_t log2_diff_max_min_transform_block_size;
    uint8_t max_transform_hierarchy_depth_inter;
    uint8_t max_transform_hierarchy_depth_intra;
    uint8_t scaling_list_enabled_flag;
    /** Scaling lists, in diagonal order, to be used for this frame. */
    /** Scaling List for 4x4 quantization matrix,
       indexed as ScalingList4x4[matrixId][i]. */
    uint8_t ScalingList4x4[6][16];
    /** Scaling List for 8x8 quantization matrix,
       indexed as ScalingList8x8[matrixId][i]. */
    uint8_t ScalingList8x8[6][64];
    /** Scaling List for 16x16 quantization matrix,
       indexed as ScalingList16x16[matrixId][i]. */
    uint8_t ScalingList16x16[6][64];
    /** Scaling List for 32x32 quantization matrix,
       indexed as ScalingList32x32[matrixId][i]. */
    uint8_t ScalingList32x32[2][64];
    /** Scaling List DC Coefficients for 16x16,
       indexed as ScalingListDCCoeff16x16[matrixId]. */
    uint8_t ScalingListDCCoeff16x16[6];
    /** Scaling List DC Coefficients for 32x32,
       indexed as ScalingListDCCoeff32x32[matrixId]. */
    uint8_t ScalingListDCCoeff32x32[2];
    uint8_t amp_enabled_flag;
    uint8_t sample_adaptive_offset_enabled_flag;
    uint8_t pcm_enabled_flag;
    /** Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
    uint8_t pcm_sample_bit_depth_luma_minus1;
    /** Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
    uint8_t pcm_sample_bit_depth_chroma_minus1;
    /** Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
    uint8_t log2_min_pcm_luma_coding_block_size_minus3;
    /** Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
    uint8_t log2_diff_max_min_pcm_luma_coding_block_size;
    /** Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
    uint8_t pcm_loop_filter_disabled_flag;
    /** Per spec, when zero, assume short_term_ref_pic_set_sps_flag
        is also zero. */
    uint8_t num_short_term_ref_pic_sets;
    uint8_t long_term_ref_pics_present_flag;
    /** Only needed if long_term_ref_pics_present_flag is set. Ignored
        otherwise. */
    uint8_t num_long_term_ref_pics_sps;
    uint8_t sps_temporal_mvp_enabled_flag;
    uint8_t strong_intra_smoothing_enabled_flag;
    /** @} */

    /** \name HEVC Picture Parameter Set
     *
     * Copies of the HEVC Picture Parameter Set bitstream fields.
     * @{ */
    uint8_t dependent_slice_segments_enabled_flag;
    uint8_t output_flag_present_flag;
    uint8_t num_extra_slice_header_bits;
    uint8_t sign_data_hiding_enabled_flag;
    uint8_t cabac_init_present_flag;
    uint8_t num_ref_idx_l0_default_active_minus1;
    uint8_t num_ref_idx_l1_default_active_minus1;
    int8_t init_qp_minus26;
    uint8_t constrained_intra_pred_flag;
    uint8_t transform_skip_enabled_flag;
    uint8_t cu_qp_delta_enabled_flag;
    /** Only needed if cu_qp_delta_enabled_flag is set. Ignored otherwise. */
    uint8_t diff_cu_qp_delta_depth;
    int8_t pps_cb_qp_offset;
    int8_t pps_cr_qp_offset;
    uint8_t pps_slice_chroma_qp_offsets_present_flag;
    uint8_t weighted_pred_flag;
    uint8_t weighted_bipred_flag;
    uint8_t transquant_bypass_enabled_flag;
    uint8_t tiles_enabled_flag;
    uint8_t entropy_coding_sync_enabled_flag;
    /** Only valid if tiles_enabled_flag is set. Ignored otherwise. */
    uint8_t num_tile_columns_minus1;
    /** Only valid if tiles_enabled_flag is set. Ignored otherwise. */
    uint8_t num_tile_rows_minus1;
    /** Only valid if tiles_enabled_flag is set. Ignored otherwise. */
    uint8_t uniform_spacing_flag;
    /** Only need to set 0..num_tile_columns_minus1. The struct
        definition reserves up to the maximum of 20. Invalid values are
        ignored. */
    uint16_t column_width_minus1[20];
    /** Only need to set 0..num_tile_rows_minus1. The struct
        definition reserves up to the maximum of 22. Invalid values are
        ignored.*/
    uint16_t row_height_minus1[22];
    /** Only needed if tiles_enabled_flag is set. Invalid values are
        ignored. */
    uint8_t loop_filter_across_tiles_enabled_flag;
    uint8_t pps_loop_filter_across_slices_enabled_flag;
    uint8_t deblocking_filter_control_present_flag;
    /** Only valid if deblocking_filter_control_present_flag is set. Ignored
        otherwise. */
    uint8_t deblocking_filter_override_enabled_flag;
    /** Only valid if deblocking_filter_control_present_flag is set. Ignored
        otherwise. */
    uint8_t pps_deblocking_filter_disabled_flag;
    /** Only valid if deblocking_filter_control_present_flag is set and
        pps_deblocking_filter_disabled_flag is not set. Ignored otherwise.*/
    int8_t pps_beta_offset_div2;
    /** Only valid if deblocking_filter_control_present_flag is set and
        pps_deblocking_filter_disabled_flag is not set. Ignored otherwise. */
    int8_t pps_tc_offset_div2;
    uint8_t lists_modification_present_flag;
    uint8_t log2_parallel_merge_level_minus2;
    uint8_t slice_segment_header_extension_present_flag;
    /** @} */

    /** \name HEVC Slice Segment Header
     *
     * Copies of the HEVC Slice Segment Header bitstream fields and calculated
     * values detailed in the specification.
     * @{ */
    /** Set to 1 if nal_unit_type is equal to IDR_W_RADL or IDR_N_LP.
        Set to zero otherwise. */
    uint8_t IDRPicFlag;
    /** Set to 1 if nal_unit_type in the range of BLA_W_LP to
        RSV_IRAP_VCL23, inclusive. Set to zero otherwise.*/
    uint8_t RAPPicFlag;
    /** See section 7.4.7.1 of the specification. */
    uint8_t CurrRpsIdx;
    /** See section 7.4.7.2 of the specification. */
    uint32_t NumPocTotalCurr;
    /** Corresponds to specification field, NumDeltaPocs[RefRpsIdx].
        Only applicable when short_term_ref_pic_set_sps_flag == 0.
        Implementations will ignore this value in other cases. See 7.4.8. */
    uint32_t NumDeltaPocsOfRefRpsIdx;
    /** Section 7.6.3.1 of the H.265/HEVC Specification defines the syntax of
        the slice_segment_header. This header contains information that
        some VDPAU implementations may choose to skip. The VDPAU API
        requires client applications to track the number of bits used in the
        slice header for structures associated with short term and long term
        reference pictures. First, VDPAU requires the number of bits used by
        the short_term_ref_pic_set array in the slice_segment_header. */
    uint32_t NumShortTermPictureSliceHeaderBits;
    /** Second, VDPAU requires the number of bits used for long term reference
        pictures in the slice_segment_header. This is equal to the number
        of bits used for the contents of the block beginning with
        "if(long_term_ref_pics_present_flag)". */
    uint32_t NumLongTermPictureSliceHeaderBits;
    /** @} */

    /** Slice Decoding Process - Picture Order Count */
    /** The value of PicOrderCntVal of the picture in the access unit
        containing the SEI message. The picture being decoded. */
    int32_t CurrPicOrderCntVal;

    /** Slice Decoding Process - Reference Picture Sets */
    /** Array of video reference surfaces.
        Set any unused positions to VDP_INVALID_HANDLE. */
    VdpVideoSurface RefPics[16];
    /** Array of picture order counts. These correspond to positions
        in the RefPics array. */
    int32_t PicOrderCntVal[16];
    /** Array used to specify whether a particular RefPic is
        a long term reference. A value of "1" indicates a long-term
        reference. */
    uint8_t IsLongTerm[16];
    /** Copy of specification field, see Section 8.3.2 of the
        H.265/HEVC Specification. */
    uint8_t NumPocStCurrBefore;
    /** Copy of specification field, see Section 8.3.2 of the
        H.265/HEVC Specification. */
    uint8_t NumPocStCurrAfter;
    /** Copy of specification field, see Section 8.3.2 of the
        H.265/HEVC Specification. */
    uint8_t NumPocLtCurr;
    /** Reference Picture Set list, one of the short-term RPS. These
        correspond to positions in the RefPics array. */
    uint8_t RefPicSetStCurrBefore[8];
    /** Reference Picture Set list, one of the short-term RPS. These
        correspond to positions in the RefPics array. */
    uint8_t RefPicSetStCurrAfter[8];
    /** Reference Picture Set list, one of the long-term RPS. These
        correspond to positions in the RefPics array. */
    uint8_t RefPicSetLtCurr[8];
} VdpPictureInfoHEVC;

/**
 * \brief Picture parameter information for an HEVC 444 picture.
 *
 * Note: VDPAU clients must use VdpPictureInfoHEVC444 to describe the
 * attributes of a frame being decoded with
 * VDP_DECODER_PROFILE_HEVC_MAIN_444.
 */
typedef struct {
    /** \ref VdpPictureInfoHEVC struct. */
    VdpPictureInfoHEVC pictureInfo;

    /* SPS Range Extensions for Main 444, Main 10, etc. */
    uint8_t sps_range_extension_flag;
    /* sps extension for transform_skip_rotation_enabled_flag */
    uint8_t transformSkipRotationEnableFlag;
    /* sps extension for transform_skip_context_enabled_flag */
    uint8_t transformSkipContextEnableFlag;
    /* sps implicit_rdpcm_enabled_flag */
    uint8_t implicitRdpcmEnableFlag;
    /* sps explicit_rdpcm_enabled_flag */
    uint8_t explicitRdpcmEnableFlag;
    /* sps extended_precision_processing_flag,always 0 in current profile */
    uint8_t extendedPrecisionProcessingFlag;
    /* sps intra_smoothing_disabled_flag */
    uint8_t intraSmoothingDisabledFlag;
    /* sps high_precision_offsets_enabled_flag */
    uint8_t highPrecisionOffsetsEnableFlag;
    /* sps persistent_rice_adaptation_enabled_flag */
    uint8_t persistentRiceAdaptationEnableFlag;
    /* sps cabac_bypass_alignment_enabled_flag, always 0 in current profile */
    uint8_t cabacBypassAlignmentEnableFlag;
    /* sps intraBlockCopyEnableFlag, always 0 not used by the spec as of now */
    uint8_t intraBlockCopyEnableFlag;

    /* PPS Range Extensions for Main 444, Main 10, etc. */
    uint8_t pps_range_extension_flag;
    /* pps extension log2_max_transform_skip_block_size_minus2, 0...5 */
    uint8_t log2MaxTransformSkipSize;
    /* pps cross_component_prediction_enabled_flag */
    uint8_t crossComponentPredictionEnableFlag;
    /* pps chroma_qp_adjustment_enabled_flag */
    uint8_t chromaQpAdjustmentEnableFlag;
    /* pps diff_cu_chroma_qp_adjustment_depth, 0...3 */
    uint8_t diffCuChromaQpAdjustmentDepth;
    /* pps chroma_qp_adjustment_table_size_minus1+1, 1...6 */
    uint8_t chromaQpAdjustmentTableSize;
    /* pps log2_sao_offset_scale_luma, max(0,bitdepth-10), */
    /* maxBitdepth 16 for future. */
    uint8_t log2SaoOffsetScaleLuma;
    /* pps log2_sao_offset_scale_chroma */
    uint8_t log2SaoOffsetScaleChroma;
    /* -[12,+12] */
    int8_t cb_qp_adjustment[6];
    /* -[12,+12] */
    int8_t cr_qp_adjustment[6];

} VdpPictureInfoHEVC444;

/**
 * \brief Picture parameter information for HEVC FormatRangeExtensions picture.
 *
 * HEVC Main 444 Profile is part of Format Range Extensions profiles,
 * Due to similarities between Format Range Extensions profiles, the picture
 * parameter structure is re-used for Format Range Extensions profiles
 * supported.
 */
typedef VdpPictureInfoHEVC444 VdpPictureInfoHEVCRangeExt;

/**
 * \brief Decode a compressed field/frame and render the result
 *        into a \ref VdpVideoSurface "VdpVideoSurface".
 * \param[in] decoder The decoder object that will perform the
 *       decode operation.
 * \param[in] target The video surface to render to.
 * \param[in] picture_info A (pointer to a) structure containing
 *       information about the picture to be decoded. Note that
 *       the appropriate type of VdpPictureInfo* structure must
 *       be provided to match to profile that the decoder was
 *       created for.
 * \param[in] bitstream_buffer_count The number of bitstream
 *       buffers containing compressed data for this picture.
 * \param[in] bitstream_buffers An array of bitstream buffers.
 * \return VdpStatus The completion status of the operation.
 *
 * See \ref video_mixer_usage for additional information.
 */
typedef VdpStatus VdpDecoderRender(
    VdpDecoder                 decoder,
    VdpVideoSurface            target,
    VdpPictureInfo const *     picture_info,
    uint32_t                   bitstream_buffer_count,
    VdpBitstreamBuffer const * bitstream_buffers
);

/** @} */

/**
 * \defgroup VdpVideoMixer VdpVideoMixer; Video Post-processing and Compositing object
 *
 * VdpVideoMixer can perform some subset of the following
 * post-processing steps on video:
 * - De-interlacing
 *   - Various types, with or without inverse telecine
 * - Noise-reduction
 * - Sharpness adjustment
 * - Color space conversion to RGB
 * - Chroma format upscaling to 4:4:4
 *
 * A VdpVideoMixer takes a source \ref VdpVideoSurface
 * "VdpVideoSurface" VdpVideoSurface and performs various video
 * processing steps on it (potentially using information from
 * past or future video surfaces). It scales the video and
 * converts it to RGB, then optionally composites it with
 * multiple auxiliary \ref VdpOutputSurface "VdpOutputSurface"s
 * before writing the result to the destination \ref
 * VdpOutputSurface "VdpOutputSurface".
 *
 * The video mixer compositing model is as follows:
 *
 * - A rectangle will be rendered on an output surface. No
 *   pixels will be rendered outside of this output rectangle.
 *   The contents of this rectangle will be a composite of many
 *   layers.
 *
 * - The first layer is the background color. The background
 *   color will fill the entire rectangle.
 *
 * - The second layer is the processed video which has been
 *   converted to RGB. These pixels will overwrite the
 *   background color of the first layer except where the second
 *   layer's rectangle does not completely cover the output
 *   rectangle. In those regions the background color will
 *   continue to show. If any portion of the second layer's
 *   output rectangle is outside of the output rectangle, those
 *   portions will be clipped.
 *
 * - The third layer contains some number of auxiliary layers
 *   (in the form of \ref VdpOutputSurface "VdpOutputSurface"s)
 *   which will be composited using the alpha value from the
 *   those surfaces. The compositing operations are equivalent
 *   to rendering with \ref VdpOutputSurfaceRenderOutputSurface
 *   using a source blend factor of SOURCE_ALPHA, a destination
 *   blend factor of ONE_MINUS_SOURCE_ALPHA and an equation of
 *   ADD.
 *
 * @{
 */

/**
 * \brief A VdpVideoMixer feature that must be requested at
 *        creation time to be used.
 *
 * Certain advanced VdpVideoMixer features are optional, and the
 * ability to use those features at all must be requested when
 * the VdpVideoMixer object is created. Each feature is named via
 * a specific VdpVideoMixerFeature value.
 *
 * Once requested, these features are permanently available
 * within that specific VdpVideoMixer object. All features that
 * are not explicitly requested at creation time default to
 * being permanently unavailable.
 *
 * Even when requested, all features default to being initially
 * disabled. However, applications can subsequently enable and
 * disable features at any time. See \ref
 * VdpVideoMixerSetFeatureEnables.
 *
 * Some features allow configuration of their operation. Each
 * configurable item is an \ref VdpVideoMixerAttribute. These
 * attributes may be manipulated at any time using \ref
 * VdpVideoMixerSetAttributeValues.
 */
typedef uint32_t VdpVideoMixerFeature;

/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * When requested and enabled, motion adaptive temporal
 * deinterlacing will be used on interlaced content.
 *
 * When multiple de-interlacing options are requested and
 * enabled, the back-end implementation chooses the best
 * algorithm to apply.
 */
#define VDP_VIDEO_MIXER_FEATURE_DEINTERLACE_TEMPORAL         ((VdpVideoMixerFeature)0)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * When requested and enabled, this enables a more advanced
 * version of temporal de-interlacing, that additionally uses
 * edge-guided spatial interpolation.
 *
 * When multiple de-interlacing options are requested and
 * enabled, the back-end implementation chooses the best
 * algorithm to apply.
 */
#define VDP_VIDEO_MIXER_FEATURE_DEINTERLACE_TEMPORAL_SPATIAL ((VdpVideoMixerFeature)1)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * When requested and enabled, cadence detection will be enabled
 * on interlaced content and the video mixer will try to extract
 * progressive frames from pull-down material.
 */
#define VDP_VIDEO_MIXER_FEATURE_INVERSE_TELECINE             ((VdpVideoMixerFeature)2)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * When requested and enabled, a noise reduction algorithm will
 * be applied to the video.
 */
#define VDP_VIDEO_MIXER_FEATURE_NOISE_REDUCTION              ((VdpVideoMixerFeature)3)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * When requested and enabled, a sharpening algorithm will be
 * applied to the video.
 */
#define VDP_VIDEO_MIXER_FEATURE_SHARPNESS                    ((VdpVideoMixerFeature)4)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * When requested and enabled, the alpha of the rendered
 * surface, which is normally set to the alpha of the background
 * color, will be forced to 0.0 on pixels corresponding to
 * source video surface luminance values in the range specified
 * by attributes \ref VDP_VIDEO_MIXER_ATTRIBUTE_LUMA_KEY_MIN_LUMA
 * to \ref VDP_VIDEO_MIXER_ATTRIBUTE_LUMA_KEY_MAX_LUMA. This
 * keying is performed after scaling and de-interlacing.
 */
#define VDP_VIDEO_MIXER_FEATURE_LUMA_KEY                     ((VdpVideoMixerFeature)5)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * A VDPAU implementation may support multiple scaling algorithms of
 * differing quality, and may potentially support a different subset
 * of algorithms on different hardware.
 *
 * In some cases, higher quality algorithms may require more resources
 * (memory size, memory bandwidth, etc.) to operate. Hence, these high
 * quality algorithms must be explicitly requested and enabled by the client
 * application. This allows applications operating in a resource-constrained
 * environment to have some level of control over resource usage.
 *
 * Basic scaling is always built into any video mixer, and is known as
 * level 0. Scaling quality increases beginning with optional level 1,
 * through optional level 9.
 *
 * If an application requests and enables multiple high quality scaling
 * algorithms, the highest level enabled scaling algorithm will be used.
 */
#define VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1      ((VdpVideoMixerFeature)11)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * See \ref VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1 for details.
 */
#define VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L2      ((VdpVideoMixerFeature)12)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * See \ref VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1 for details.
 */
#define VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L3      ((VdpVideoMixerFeature)13)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * See \ref VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1 for details.
 */
#define VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L4      ((VdpVideoMixerFeature)14)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * See \ref VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1 for details.
 */
#define VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L5      ((VdpVideoMixerFeature)15)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * See \ref VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1 for details.
 */
#define VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L6      ((VdpVideoMixerFeature)16)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * See \ref VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1 for details.
 */
#define VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L7      ((VdpVideoMixerFeature)17)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * See \ref VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1 for details.
 */
#define VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L8      ((VdpVideoMixerFeature)18)
/**
 * \hideinitializer
 * \brief A VdpVideoMixerFeature.
 *
 * See \ref VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1 for details.
 */
#define VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L9      ((VdpVideoMixerFeature)19)

/**
 * \brief A VdpVideoMixer creation parameter.
 *
 * When a VdpVideoMixer is created, certain parameters may be
 * supplied. Each parameter is named via a specific
 * VdpVideoMixerParameter value.
 *
 * Each parameter has a specific type, and specific default
 * value if not specified at VdpVideoMixer creation time. The
 * application may query the legal supported range for some
 * parameters.
 */
typedef uint32_t VdpVideoMixerParameter;

/**
 * \hideinitializer
 * \brief The exact width of input video surfaces.
 *
 * This parameter's type is uint32_t.
 *
 * This parameter defaults to 0 if not specified, which entails
 * that it must be specified.
 *
 * The application may query this parameter's supported
 * range.
 */
#define VDP_VIDEO_MIXER_PARAMETER_VIDEO_SURFACE_WIDTH  ((VdpVideoMixerParameter)0)
/**
 * \hideinitializer
 * \brief The exact height of input video surfaces.
 *
 * This parameter's type is uint32_t.
 *
 * This parameter defaults to 0 if not specified, which entails
 * that it must be specified.
 *
 * The application may query this parameter's supported
 * range.
 */
#define VDP_VIDEO_MIXER_PARAMETER_VIDEO_SURFACE_HEIGHT ((VdpVideoMixerParameter)1)
/**
 * \hideinitializer
 * \brief The chroma type of the input video surfaces the will
 *        process.
 *
 * This parameter's type is VdpChromaType.
 *
 * If not specified, this parameter defaults to
 * VDP_CHROMA_TYPE_420.
 *
 * The application may not query this application's supported
 * range, since it is a potentially disjoint enumeration.
 */
#define VDP_VIDEO_MIXER_PARAMETER_CHROMA_TYPE          ((VdpVideoMixerParameter)2)
/**
 * \hideinitializer
 * \brief The number of auxiliary layers in the mixer's
 *        compositing model.
 *
 * Note that this indicates the maximum number of layers that
 * may be processed by a given \ref VdpVideoMixer "VdpVideoMixer"
 * object. Each individual \ref VdpVideoMixerRender invocation
 * may choose to use a different number of actual layers, from 0
 * up to this limit.
 *
 * This attribute's type is uint32_t.
 *
 * If not specified, this parameter defaults to 0.
 *
 * The application may query this parameter's supported
 * range.
 */
#define VDP_VIDEO_MIXER_PARAMETER_LAYERS               ((VdpVideoMixerParameter)3)

/**
 * \brief An adjustable attribute of VdpVideoMixer operation.
 *
 * Various attributes of VdpVideoMixer operation may be adjusted
 * at any time. Each attribute is named via a specific
 * VdpVideoMixerAttribute value.
 *
 * Each attribute has a specific type, and specific default
 * value if not specified at VdpVideoMixer creation time. The
 * application may query the legal supported range for some
 * attributes.
 */
typedef uint32_t VdpVideoMixerAttribute;

/**
 * \hideinitializer
 * \brief The background color in the VdpVideoMixer's compositing
 *        model.
 *
 * This attribute's type is VdpColor.
 *
 * This parameter defaults to black (all color components 0.0
 * and alpha 1.0).
 *
 * The application may not query this parameter's supported
 * range, since the type is not scalar.
 */
#define VDP_VIDEO_MIXER_ATTRIBUTE_BACKGROUND_COLOR      ((VdpVideoMixerAttribute)0)
/**
 * \hideinitializer
 * \brief The color-space conversion matrix used by the
 *        VdpVideoMixer.
 *
 * This attribute's type is \ref VdpCSCMatrix.
 *
 * Note: When using \ref VdpVideoMixerGetAttributeValues to retrieve the
 * current CSC matrix, the attribute_values array must contain a pointer to
 * a pointer a VdpCSCMatrix (VdpCSCMatrix** as a void *). The get function will
 * either initialize the referenced CSC matrix to the current value, *or*
 * clear the supplied pointer to NULL, if the previous set call supplied a
 * value of NULL in parameter_values, to request the default matrix.
 *
 * \code
 * VdpCSCMatrix   matrix;
 * VdpCSCMatrix * matrix_ptr;
 * void * attribute_values[] = {&matrix_ptr};
 * VdpStatus st = vdp_video_mixer_get_attribute_values(..., attribute_values, ...);
 * \endcode
 *
 * This parameter defaults to a matrix suitable for ITU-R BT.601
 * input surfaces, with no procamp adjustments.
 *
 * The application may not query this parameter's supported
 * range, since the type is not scalar.
 */
#define VDP_VIDEO_MIXER_ATTRIBUTE_CSC_MATRIX            ((VdpVideoMixerAttribute)1)
/**
 * \hideinitializer
 * \brief The amount of noise reduction algorithm to apply.
 *
 * This attribute's type is float.
 *
 * This parameter defaults to 0.0, which equates to no noise
 * reduction.
 *
 * The application may query this parameter's supported range.
 * However, the range is fixed as 0.0...1.0.
 */
#define VDP_VIDEO_MIXER_ATTRIBUTE_NOISE_REDUCTION_LEVEL ((VdpVideoMixerAttribute)2)
/**
 * \hideinitializer
 * \brief The amount of sharpening, or blurring, to apply.
 *
 * This attribute's type is float.
 *
 * This parameter defaults to 0.0, which equates to no
 * sharpening.
 *
 * Positive values request sharpening. Negative values request
 * blurring.
 *
 * The application may query this parameter's supported range.
 * However, the range is fixed as -1.0...1.0.
 */
#define VDP_VIDEO_MIXER_ATTRIBUTE_SHARPNESS_LEVEL       ((VdpVideoMixerAttribute)3)
/**
 * \hideinitializer
 * \brief The minimum luma value for the luma key algorithm.
 *
 * This attribute's type is float.
 *
 * This parameter defaults to 0.0.
 *
 * The application may query this parameter's supported range.
 * However, the range is fixed as 0.0...1.0.
 */
#define VDP_VIDEO_MIXER_ATTRIBUTE_LUMA_KEY_MIN_LUMA     ((VdpVideoMixerAttribute)4)
/**
 * \hideinitializer
 * \brief The maximum luma value for the luma key algorithm.
 *
 * This attribute's type is float.
 *
 * This parameter defaults to 1.0.
 *
 * The application may query this parameter's supported range.
 * However, the range is fixed as 0.0...1.0.
 */
#define VDP_VIDEO_MIXER_ATTRIBUTE_LUMA_KEY_MAX_LUMA     ((VdpVideoMixerAttribute)5)
/**
 * \hideinitializer
 * \brief Whether de-interlacers should operate solely on luma, and bob chroma.
 *
 * Note: This attribute only affects advanced de-interlacing algorithms, not
 * bob or weave.
 *
 * This attribute's type is uint8_t.
 *
 * This parameter defaults to 0.
 *
 * The application may query this parameter's supported range.
 * However, the range is fixed as 0 (no/off) ... 1 (yes/on).
 */
#define VDP_VIDEO_MIXER_ATTRIBUTE_SKIP_CHROMA_DEINTERLACE ((VdpVideoMixerAttribute)6)

/**
 * \brief Query the implementation's support for a specific
 *        feature.
 * \param[in] device The device to query.
 * \param[in] feature The feature for which support is to be
 *       queried.
 * \param[out] is_supported Is the specified feature supported?
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerQueryFeatureSupport(
    VdpDevice            device,
    VdpVideoMixerFeature feature,
    /* output parameters follow */
    VdpBool *            is_supported
);

/**
 * \brief Query the implementation's support for a specific
 *        parameter.
 * \param[in] device The device to query.
 * \param[in] parameter The parameter for which support is to be
 *       queried.
 * \param[out] is_supported Is the specified parameter
 *       supported?
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerQueryParameterSupport(
    VdpDevice              device,
    VdpVideoMixerParameter parameter,
    /* output parameters follow */
    VdpBool *              is_supported
);

/**
 * \brief Query the implementation's support for a specific
 *        attribute.
 * \param[in] device The device to query.
 * \param[in] feature The feature for which support is to be
 *       queried.
 * \param[out] is_supported Is the specified feature supported?
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerQueryAttributeSupport(
    VdpDevice              device,
    VdpVideoMixerAttribute attribute,
    /* output parameters follow */
    VdpBool *              is_supported
);

/**
 * \brief Query the implementation's supported for a specific
 *        parameter.
 * \param[in] device The device to query.
 * \param[in] parameter The parameter for which support is to be
 *       queried.
 * \param[out] min_value The minimum supported value.
 * \param[out] max_value The maximum supported value.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerQueryParameterValueRange(
    VdpDevice              device,
    VdpVideoMixerParameter parameter,
    /* output parameters follow */
    void *                min_value,
    void *                max_value
);

/**
 * \brief Query the implementation's supported for a specific
 *        attribute.
 * \param[in] device The device to query.
 * \param[in] attribute The attribute for which support is to be
 *       queried.
 * \param[out] min_value The minimum supported value.
 * \param[out] max_value The maximum supported value.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerQueryAttributeValueRange(
    VdpDevice              device,
    VdpVideoMixerAttribute attribute,
    /* output parameters follow */
    void *                min_value,
    void *                max_value
);

/**
 * \brief An opaque handle representing a VdpVideoMixer object.
 */
typedef uint32_t VdpVideoMixer;

/**
 * \brief Create a VdpVideoMixer.
 * \param[in] device The device that will contain the mixer.
 * \param[in] feature_count The number of features to request.
 * \param[in] features The list of features to request.
 * \param[in] parameter_count The number of parameters to set.
 * \param[in] parameters The list of parameters to set.
 * \param[in] parameter_values The values for the parameters. Note that each
 *     entry in the value array is a pointer to the actual value. In other
 *     words, the values themselves are not cast to "void *" and passed
 *     "inside" the array.
 * \param[out] mixer The new mixer's handle.
 * \return VdpStatus The completion status of the operation.
 *
 * Initially, all requested features will be disabled. They can
 * be enabled using \ref VdpVideoMixerSetFeatureEnables.
 *
 * Initially, all attributes will have default values. Values
 * can be changed using \ref VdpVideoMixerSetAttributeValues.
 */
typedef VdpStatus VdpVideoMixerCreate(
    VdpDevice                      device,
    // The set of features to request
    uint32_t                       feature_count,
    VdpVideoMixerFeature const *   features,
    // The parameters used during creation
    uint32_t                       parameter_count,
    VdpVideoMixerParameter const * parameters,
    void const * const *           parameter_values,
    /* output parameters follow */
    VdpVideoMixer *                mixer
);

/**
 * \brief Enable or disable features.
 * \param[in] mixer The mixer to manipulate.
 * \param[in] feature_count The number of features to
 *       enable/disable.
 * \param[in] features The list of features to enable/disable.
 * \param[in] feature_enables The list of new feature enable
 *       values.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerSetFeatureEnables(
    VdpVideoMixer                mixer,
    uint32_t                     feature_count,
    VdpVideoMixerFeature const * features,
    VdpBool const *              feature_enables
);

/**
 * \brief Set attribute values
 * \param[in] mixer The mixer to manipulate.
 * \param[in] attribute_count The number of attributes to set.
 * \param[in] attributes The list of attributes to set.
 * \param[in] attribute_values The values for the attributes. Note that each
 *     entry in the value array is a pointer to the actual value. In other
 *     words, the values themselves are not cast to "void *" and passed
 *     "inside" the array. A NULL pointer requests that the default value be
 *     set for that attribute.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerSetAttributeValues(
    VdpVideoMixer                  mixer,
    uint32_t                       attribute_count,
    VdpVideoMixerAttribute const * attributes,
    void const * const *           attribute_values
);

/**
 * \brief Retrieve whether features were requested at creation
 *        time.
 * \param[in] mixer The mixer to query.
 * \param[in] feature_count The number of features to query.
 * \param[in] features The list of features to query.
 * \param[out] feature_supported A list of values indicating
 *       whether the feature was requested, and hence is
 *       available.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerGetFeatureSupport(
    VdpVideoMixer                mixer,
    uint32_t                     feature_count,
    VdpVideoMixerFeature const * features,
    /* output parameters follow */
    VdpBool *                    feature_supports
);

/**
 * \brief Retrieve whether features are enabled.
 * \param[in] mixer The mixer to manipulate.
 * \param[in] feature_count The number of features to query.
 * \param[in] features The list of features to query.
 * \param[out] feature_enabled A list of values indicating
 *       whether the feature is enabled.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerGetFeatureEnables(
    VdpVideoMixer                mixer,
    uint32_t                     feature_count,
    VdpVideoMixerFeature const * features,
    /* output parameters follow */
    VdpBool *                    feature_enables
);

/**
 * \brief Retrieve parameter values given at creation time.
 * \param[in] mixer The mixer to manipulate.
 * \param[in] parameter_count The number of parameters to query.
 * \param[in] parameters The list of parameters to query.
 * \param[out] parameter_values The list of current values for
 *     the parameters. Note that each entry in the value array is a pointer to
 *     storage that will receive the actual value. If the attribute's type is
 *     a pointer itself, please closely read the documentation for that
 *     attribute type for any other data passing requirements.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerGetParameterValues(
    VdpVideoMixer                  mixer,
    uint32_t                       parameter_count,
    VdpVideoMixerParameter const * parameters,
    /* output parameters follow */
    void * const *                 parameter_values
);

/**
 * \brief Retrieve current attribute values.
 * \param[in] mixer The mixer to manipulate.
 * \param[in] attribute_count The number of attributes to query.
 * \param[in] attributes The list of attributes to query.
 * \param[out] attribute_values The list of current values for
 *     the attributes. Note that each entry in the value array is a pointer to
 *     storage that will receive the actual value. If the attribute's type is
 *     a pointer itself, please closely read the documentation for that
 *     attribute type for any other data passing requirements.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerGetAttributeValues(
    VdpVideoMixer                  mixer,
    uint32_t                       attribute_count,
    VdpVideoMixerAttribute const * attributes,
    /* output parameters follow */
    void * const *                 attribute_values
);

/**
 * \brief Destroy a VdpVideoMixer.
 * \param[in] device The device to destroy.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpVideoMixerDestroy(
    VdpVideoMixer mixer
);

/**
 * \hideinitializer
 * \brief The structure of the picture present in a \ref
 *        VdpVideoSurface "VdpVideoSurface".
 */
typedef enum {
    /**
     * The picture is a field, and is the top field of the surface.
     */
    VDP_VIDEO_MIXER_PICTURE_STRUCTURE_TOP_FIELD,
    /**
     * The picture is a field, and is the bottom field of the
     * surface.
     */
    VDP_VIDEO_MIXER_PICTURE_STRUCTURE_BOTTOM_FIELD,
    /**
     * The picture is a frame, and hence is the entire surface.
     */
    VDP_VIDEO_MIXER_PICTURE_STRUCTURE_FRAME,
} VdpVideoMixerPictureStructure;

#define VDP_LAYER_VERSION 0

/**
 * \brief Definition of an additional \ref VdpOutputSurface
 *        "VdpOutputSurface" layer in the composting model.
 */
typedef struct {
    /**
     * This field must be filled with VDP_LAYER_VERSION
     */
    uint32_t struct_version;
    /**
     * The surface to composite from.
     */
    VdpOutputSurface source_surface;
    /**
     * The sub-rectangle of the source surface to use. If NULL, the
     * entire source surface will be used.
     */
    VdpRect const *  source_rect;
    /**
     * The sub-rectangle of the destination surface to map
     * this layer into. This rectangle is relative to the entire
     * destination surface. This rectangle will be clipped by \ref
     * VdpVideoMixerRender's \b destination_rect. If NULL, the
     * destination rectangle will be sized to match the source
     * rectangle, and will be located at the origin.
     */
     VdpRect const * destination_rect;
} VdpLayer;

/**
 * \brief Perform a video post-processing and compositing
 *        operation.
 * \param[in] mixer The mixer object that will perform the
 *       mixing/rendering operation.
 * \param[in] background_surface A background image. If set to any value other
 *       than VDP_INVALID_HANDLE, the specific surface will be used instead of
 *       the background color as the first layer in the mixer's compositing
 *       process.
 * \param[in] background_source_rect When background_surface is specified,
 *       this parameter indicates the portion of background_surface that will
 *       be used as the background layer. The specified region will be
 *       extracted and scaled to match the size of destination_rect. If NULL,
 *       the entire background_surface will be used.
 * \param[in] current_picture_structure The picture structure of
 *       the field/frame to be processed. This field/frame is
 *       presented in the \b video_surface_current parameter. If
 *       frame, then all \b video_surface_* parameters are
 *       assumed to be frames. If field, then all
 *       video_surface_* parameters are assumed to be fields,
 *       with alternating top/bottom-ness derived from
 *       video_surface_current.
 * \param[in] video_surfaces_past_count The number of provided
 *       fields/frames prior to the current picture.
 * \param[in] video_surfaces_past The fields/frames prior to the
 *       current field/frame. Note that array index 0 is the
 *       field/frame temporally nearest to the current
 *       field/frame, with increasing array indices used for
 *       older frames. Unavailable entries may be set to
 *       \ref VDP_INVALID_HANDLE.
 * \param[in] video_surface_current The field/frame to be
 *       processed.
 * \param[in] video_surfaces_future_count The number of provided
 *       fields/frames following the current picture.
 * \param[in] video_surfaces_future The fields/frames that
 *       follow the current field/frame. Note that array index 0
 *       is the field/frame temporally nearest to the current
 *       field/frame, with increasing array indices used for
 *       newer frames. Unavailable entries may be set to \ref
 *       VDP_INVALID_HANDLE.
 * \param[in] video_source_rect The sub-rectangle of the source
 *       video surface to extract and process. If NULL, the
 *       entire surface will be used. Left/right and/or top/bottom
 *       co-ordinates may be swapped to flip the source. Values
 *       from outside the video surface are valid and samples
 *       at those locations will be taken from the nearest edge.
 * \param[in] destination_surface
 * \param[in] destination_rect The sub-rectangle of the
 *       destination surface to modify. Note that rectangle clips
 *       all other actions.
 * \param[in] destination_video_rect The sub-rectangle of the
 *       destination surface that will contain the processed
 *       video. This rectangle is relative to the entire
 *       destination surface. This rectangle is clipped by \b
 *       destination_rect. If NULL, the destination rectangle
 *       will be sized to match the source rectangle, and will
 *       be located at the origin.
 * \param[in] layer_count The number of additional layers to
 *       composite above the video.
 * \param[in] layers The array of additional layers to composite
 *       above the video.
 * \return VdpStatus The completion status of the operation.
 *
 * For a complete discussion of how to use this API, please see
 * \ref video_mixer_usage.
 */
typedef VdpStatus VdpVideoMixerRender(
    VdpVideoMixer                 mixer,
    VdpOutputSurface              background_surface,
    VdpRect const *               background_source_rect,
    VdpVideoMixerPictureStructure current_picture_structure,
    uint32_t                      video_surface_past_count,
    VdpVideoSurface const *       video_surface_past,
    VdpVideoSurface               video_surface_current,
    uint32_t                      video_surface_future_count,
    VdpVideoSurface const *       video_surface_future,
    VdpRect const *               video_source_rect,
    VdpOutputSurface              destination_surface,
    VdpRect const *               destination_rect,
    VdpRect const *               destination_video_rect,
    uint32_t                      layer_count,
    VdpLayer const *              layers
);

/** @} */

/**
 * \defgroup VdpPresentationQueue VdpPresentationQueue; Video presentation (display) object
 *
 * The VdpPresentationQueue manages a queue of surfaces and
 * associated timestamps. For each surface in the queue, once
 * the associated timestamp is reached, the surface is displayed
 * to the user. This timestamp-based approach yields high
 * quality video delivery.
 *
 * The exact location of the displayed content is Window System
 * specific. For this reason, the \ref api_winsys provides an
 * API to create a \ref VdpPresentationQueueTarget object (e.g.
 * via \ref VdpPresentationQueueTargetCreateX11) which
 * encapsulates this information.
 *
 * Note that the presentation queue performs no scaling of
 * surfaces to match the display target's size, aspect ratio,
 * etc.
 *
 * Surfaces that are too large to fit into the display target
 * will be clipped. Surfaces that are too small to fill the
 * display target will be aligned to the top-left corner of the
 * display target, with the balance of the display target being
 * filled with a constant configurable "background" color.
 *
 * Note that the presentation queue operates in a manner that is
 * semantically equivalent to an overlay surface, with any
 * required color key painting hidden internally. However,
 * implementations are free to use whatever semantically
 * equivalent technique they wish. Note that implementations
 * that actually use color-keyed overlays will typically use
 * the "background" color as the overlay color key value, so
 * this color should be chosen with care.
 *
 * @{
 */

/**
 * \brief The representation of a point in time.
 *
 * VdpTime timestamps are intended to be a high-precision timing
 * system, potentially independent from any other time domain in
 * the system.
 *
 * Time is represented in units of nanoseconds. The origin
 * (i.e. the time represented by a value of 0) is implementation
 * dependent.
 */
typedef uint64_t VdpTime;

/**
 * \brief An opaque handle representing the location where
 *        video will be presented.
 *
 * VdpPresentationQueueTarget are created using a \ref api_winsys
 * specific API, such as \ref
 * VdpPresentationQueueTargetCreateX11.
 */
typedef uint32_t VdpPresentationQueueTarget;

/**
 * \brief Destroy a VdpPresentationQueueTarget.
 * \param[in] presentation_queue_target The target to destroy.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpPresentationQueueTargetDestroy(
    VdpPresentationQueueTarget presentation_queue_target
);

/**
 * \brief An opaque handle representing a presentation queue
 *        object.
 */
typedef uint32_t VdpPresentationQueue;

/**
 * \brief Create a VdpPresentationQueue.
 * \param[in] device The device that will contain the queue.
 * \param[in] presentation_queue_target The location to display
 *       the content.
 * \param[out] presentation_queue The new queue's handle.
 * \return VdpStatus The completion status of the operation.
 *
 * Note: The initial value for the background color will be set to
 * an implementation-defined value.
 */
typedef VdpStatus VdpPresentationQueueCreate(
    VdpDevice                  device,
    VdpPresentationQueueTarget presentation_queue_target,
    /* output parameters follow */
    VdpPresentationQueue *     presentation_queue
);

/**
 * \brief Destroy a VdpPresentationQueue.
 * \param[in] presentation_queue The queue to destroy.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpPresentationQueueDestroy(
    VdpPresentationQueue presentation_queue
);

/**
 * \brief Configure the background color setting.
 * \param[in] presentation_queue The queue to manipulate.
 * \param[in] background_color The new background color.
 *
 * Note: Implementations may choose whether to apply the
 * new background color value immediately, or defer it until
 * the next surface is presented.
 */
typedef VdpStatus VdpPresentationQueueSetBackgroundColor(
    VdpPresentationQueue presentation_queue,
    VdpColor * const     background_color
);

/**
 * \brief Retrieve the current background color setting.
 * \param[in] presentation_queue The queue to query.
 * \param[out] background_color The current background color.
 */
typedef VdpStatus VdpPresentationQueueGetBackgroundColor(
    VdpPresentationQueue presentation_queue,
    VdpColor *           background_color
);

/**
 * \brief Retrieve the presentation queue's "current" time.
 * \param[in] presentation_queue The queue to query.
 * \param[out] current_time The current time, which may
 *       represent a point between display VSYNC events.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpPresentationQueueGetTime(
    VdpPresentationQueue presentation_queue,
    /* output parameters follow */
    VdpTime *            current_time
);

/**
 * \brief Enter a surface into the presentation queue.
 * \param[in] presentation_queue The queue to query.
 * \param[in] surface The surface to enter into the queue.
 * \param[in] clip_width If set to a non-zero value, the presentation queue
 *       will display only clip_width pixels of the surface (anchored to the
 *       top-left corner of the surface.
 * \param[in] clip_height If set to a non-zero value, the presentation queue
 *       will display only clip_height lines of the surface (anchored to the
 *       top-left corner of the surface.
 * \param[in] earliest_presentation_time The timestamp
 *       associated with the surface. The presentation queue
 *       will not display the surface until the presentation
 *       queue's current time is at least this value.
 * \return VdpStatus The completion status of the operation.
 *
 * Applications may choose to allow resizing of the presentation queue target
 * (which may be e.g. a regular Window when using an X11-based
 * implementation).
 *
 * \b clip_width and \b clip_height may be used to limit the size of the
 * displayed region of a surface, in order to match the specific region that
 * was rendered to.
 *
 * In turn, this allows the application to allocate over-sized (e.g.
 * screen-sized) surfaces, but render to a region that matches the current
 * size of the video window.
 *
 * Using this technique, an application's response to window resizing may
 * simply be to render to, and display, a different region of the surface,
 * rather than de-/re-allocation of surfaces to match the updated window size.
 *
 * Implementations may impose an upper bound on the number of entries
 * contained by the presentation queue at a given time. This limit is likely
 * different to the number of \ref VdpOutputSurface "VdpOutputSurface"s that
 * may be allocated at a given time. This limit applies to entries in the
 * QUEUED or VISIBLE state only. In other words, entries that have
 * transitioned from a QUEUED or VISIBLE state to an IDLE state do not count
 * toward this limit.
 */
typedef VdpStatus VdpPresentationQueueDisplay(
    VdpPresentationQueue presentation_queue,
    VdpOutputSurface     surface,
    uint32_t             clip_width,
    uint32_t             clip_height,
    VdpTime              earliest_presentation_time
);

/**
 * \brief Wait for a surface to finish being displayed.
 * \param[in] presentation_queue The queue to query.
 * \param[in] surface The surface to wait for.
 * \param[out] first_presentation_time The timestamp of the
 *       VSYNC at which this surface was first displayed. Note
 *       that 0 means the surface was never displayed.
 * \return VdpStatus The completion status of the operation.
 *
 * Note that this API would block forever if queried about the surface most
 * recently added to a presentation queue. That is because there would be no
 * other surface that could possibly replace that surface as the currently
 * displayed surface, and hence that surface would never become idle. For
 * that reason, this function will return an error in that case.
 */
typedef VdpStatus VdpPresentationQueueBlockUntilSurfaceIdle(
    VdpPresentationQueue presentation_queue,
    VdpOutputSurface     surface,
    /* output parameters follow */
    VdpTime *            first_presentation_time
);

/**
 * \hideinitializer
 * \brief The status of a surface within a presentation queue.
 */
typedef enum {
    /** The surface is not queued or currently visible. */
    VDP_PRESENTATION_QUEUE_STATUS_IDLE,
    /** The surface is in the queue, and not currently visible. */
    VDP_PRESENTATION_QUEUE_STATUS_QUEUED,
    /** The surface is the currently visible surface. */
    VDP_PRESENTATION_QUEUE_STATUS_VISIBLE,
} VdpPresentationQueueStatus;

/**
 * \brief Poll the current queue status of a surface.
 * \param[in] presentation_queue The queue to query.
 * \param[in] surface The surface to query.
 * \param[out] status The current status of the surface within
 *       the queue.
 * \param[out] first_presentation_time The timestamp of the
 *       VSYNC at which this surface was first displayed. Note
 *       that 0 means the surface was never displayed.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpPresentationQueueQuerySurfaceStatus(
    VdpPresentationQueue         presentation_queue,
    VdpOutputSurface             surface,
    /* output parameters follow */
    VdpPresentationQueueStatus * status,
    VdpTime *                    first_presentation_time
);

/** @} */

/**
 * \defgroup display_preemption Display Preemption
 *
 * The Window System may operate within a frame-work (such as
 * Linux's VT switching) where the display is shared between the
 * Window System (e.g. X) and some other output mechanism (e.g.
 * the VT.) Given this scenario, the Window System's control of
 * the display could be preempted, and restored, at any time.
 *
 * VDPAU does not mandate that implementations hide such
 * preemptions from VDPAU client applications; doing so may
 * impose extreme burdens upon VDPAU implementations. Equally,
 * however, implementations are free to hide such preemptions
 * from client applications.
 *
 * VDPAU allows implementations to inform the client application
 * when such a preemption has occurred, and then refuse to
 * continue further operation.
 *
 * Similarly, some form of fatal hardware error could prevent further
 * operation of the VDPAU implementation, without a complete
 * re-initialization.
 *
 * The following discusses the behavior of implementations that
 * choose not to hide preemption from client applications.
 *
 * When preemption occurs, VDPAU internally destroys all
 * objects; the client application need not do this. However, if
 * the client application wishes to continue operation, it must
 * recreate all objects that it uses. It is probable that this
 * recreation will not succeed until the display ownership is
 * restored to the Window System.
 *
 * Once preemption has occurred, all VDPAU entry points will
 * return the specific error code \ref
 * VDP_STATUS_DISPLAY_PREEMPTED.
 *
 * VDPAU client applications may also be notified of such
 * preemptions and fatal errors via a callback. See \ref
 * VdpPreemptionCallbackRegister for more details.
 *
 * @{
 */

/**
 * \brief A callback to notify the client application that a
 *        device's display has been preempted.
 * \param[in] device The device that had its display preempted.
 * \param[in] context The client-supplied callback context
 *       information.
 * \return void No return value
 */
typedef void VdpPreemptionCallback(
    VdpDevice device,
    void *   context
);

/**
 * \brief Configure the display preemption callback.
 * \param[in] device The device to be monitored for preemption.
 * \param[in] callback The client application's callback
 *       function. If NULL, the callback is unregistered.
 * \param[in] context The client-supplied callback context
 *       information. This information will be passed to the
 *       callback function if/when invoked.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpPreemptionCallbackRegister(
    VdpDevice             device,
    VdpPreemptionCallback callback,
    void *               context
);

/** @} */

/**
 * \defgroup get_proc_address Entry Point Retrieval
 *
 * In order to facilitate multiple implementations of VDPAU
 * co-existing within a single process, all functionality is
 * available via function pointers. The mechanism to retrieve
 * those function pointers is described below.
 *
 * @{
 */

/**
 * \brief A type suitable for \ref VdpGetProcAddress
 *        "VdpGetProcAddress"'s \b function_id parameter.
 */
typedef uint32_t VdpFuncId;

/** \hideinitializer */
#define VDP_FUNC_ID_GET_ERROR_STRING                                            ((VdpFuncId)0)
/** \hideinitializer */
#define VDP_FUNC_ID_GET_PROC_ADDRESS                                            ((VdpFuncId)1)
/** \hideinitializer */
#define VDP_FUNC_ID_GET_API_VERSION                                             ((VdpFuncId)2)
/** \hideinitializer */
#define VDP_FUNC_ID_GET_INFORMATION_STRING                                      ((VdpFuncId)4)
/** \hideinitializer */
#define VDP_FUNC_ID_DEVICE_DESTROY                                              ((VdpFuncId)5)
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#define VDP_FUNC_ID_GENERATE_CSC_MATRIX                                         ((VdpFuncId)6)
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#define VDP_FUNC_ID_VIDEO_SURFACE_QUERY_CAPABILITIES                            ((VdpFuncId)7)
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#define VDP_FUNC_ID_VIDEO_SURFACE_QUERY_GET_PUT_BITS_Y_CB_CR_CAPABILITIES       ((VdpFuncId)8)
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#define VDP_FUNC_ID_VIDEO_SURFACE_CREATE                                        ((VdpFuncId)9)
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#define VDP_FUNC_ID_VIDEO_SURFACE_DESTROY                                       ((VdpFuncId)10)
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#define VDP_FUNC_ID_VIDEO_SURFACE_GET_PARAMETERS                                ((VdpFuncId)11)
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#define VDP_FUNC_ID_VIDEO_SURFACE_GET_BITS_Y_CB_CR                              ((VdpFuncId)12)
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#define VDP_FUNC_ID_VIDEO_SURFACE_PUT_BITS_Y_CB_CR                              ((VdpFuncId)13)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_QUERY_CAPABILITIES                           ((VdpFuncId)14)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_QUERY_GET_PUT_BITS_NATIVE_CAPABILITIES       ((VdpFuncId)15)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_QUERY_PUT_BITS_INDEXED_CAPABILITIES          ((VdpFuncId)16)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_QUERY_PUT_BITS_Y_CB_CR_CAPABILITIES          ((VdpFuncId)17)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_CREATE                                       ((VdpFuncId)18)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_DESTROY                                      ((VdpFuncId)19)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_GET_PARAMETERS                               ((VdpFuncId)20)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_GET_BITS_NATIVE                              ((VdpFuncId)21)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_PUT_BITS_NATIVE                              ((VdpFuncId)22)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_PUT_BITS_INDEXED                             ((VdpFuncId)23)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_PUT_BITS_Y_CB_CR                             ((VdpFuncId)24)
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#define VDP_FUNC_ID_BITMAP_SURFACE_QUERY_CAPABILITIES                           ((VdpFuncId)25)
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#define VDP_FUNC_ID_BITMAP_SURFACE_CREATE                                       ((VdpFuncId)26)
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#define VDP_FUNC_ID_BITMAP_SURFACE_DESTROY                                      ((VdpFuncId)27)
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#define VDP_FUNC_ID_BITMAP_SURFACE_GET_PARAMETERS                               ((VdpFuncId)28)
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#define VDP_FUNC_ID_BITMAP_SURFACE_PUT_BITS_NATIVE                              ((VdpFuncId)29)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_RENDER_OUTPUT_SURFACE                        ((VdpFuncId)33)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_RENDER_BITMAP_SURFACE                        ((VdpFuncId)34)
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#define VDP_FUNC_ID_OUTPUT_SURFACE_RENDER_VIDEO_SURFACE_LUMA                    ((VdpFuncId)35)
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#define VDP_FUNC_ID_DECODER_QUERY_CAPABILITIES                                  ((VdpFuncId)36)
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#define VDP_FUNC_ID_DECODER_CREATE                                              ((VdpFuncId)37)
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#define VDP_FUNC_ID_DECODER_DESTROY                                             ((VdpFuncId)38)
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#define VDP_FUNC_ID_DECODER_GET_PARAMETERS                                      ((VdpFuncId)39)
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#define VDP_FUNC_ID_DECODER_RENDER                                              ((VdpFuncId)40)
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#define VDP_FUNC_ID_VIDEO_MIXER_QUERY_FEATURE_SUPPORT                           ((VdpFuncId)41)
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#define VDP_FUNC_ID_VIDEO_MIXER_QUERY_PARAMETER_SUPPORT                         ((VdpFuncId)42)
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#define VDP_FUNC_ID_VIDEO_MIXER_QUERY_ATTRIBUTE_SUPPORT                         ((VdpFuncId)43)
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#define VDP_FUNC_ID_VIDEO_MIXER_QUERY_PARAMETER_VALUE_RANGE                     ((VdpFuncId)44)
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#define VDP_FUNC_ID_VIDEO_MIXER_QUERY_ATTRIBUTE_VALUE_RANGE                     ((VdpFuncId)45)
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#define VDP_FUNC_ID_VIDEO_MIXER_CREATE                                          ((VdpFuncId)46)
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#define VDP_FUNC_ID_VIDEO_MIXER_SET_FEATURE_ENABLES                             ((VdpFuncId)47)
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#define VDP_FUNC_ID_VIDEO_MIXER_SET_ATTRIBUTE_VALUES                            ((VdpFuncId)48)
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#define VDP_FUNC_ID_VIDEO_MIXER_GET_FEATURE_SUPPORT                             ((VdpFuncId)49)
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#define VDP_FUNC_ID_VIDEO_MIXER_GET_FEATURE_ENABLES                             ((VdpFuncId)50)
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#define VDP_FUNC_ID_VIDEO_MIXER_GET_PARAMETER_VALUES                            ((VdpFuncId)51)
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#define VDP_FUNC_ID_VIDEO_MIXER_GET_ATTRIBUTE_VALUES                            ((VdpFuncId)52)
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#define VDP_FUNC_ID_VIDEO_MIXER_DESTROY                                         ((VdpFuncId)53)
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#define VDP_FUNC_ID_VIDEO_MIXER_RENDER                                          ((VdpFuncId)54)
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#define VDP_FUNC_ID_PRESENTATION_QUEUE_TARGET_DESTROY                           ((VdpFuncId)55)
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#define VDP_FUNC_ID_PRESENTATION_QUEUE_CREATE                                   ((VdpFuncId)56)
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#define VDP_FUNC_ID_PRESENTATION_QUEUE_DESTROY                                  ((VdpFuncId)57)
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#define VDP_FUNC_ID_PRESENTATION_QUEUE_SET_BACKGROUND_COLOR                     ((VdpFuncId)58)
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#define VDP_FUNC_ID_PRESENTATION_QUEUE_GET_BACKGROUND_COLOR                     ((VdpFuncId)59)
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#define VDP_FUNC_ID_PRESENTATION_QUEUE_GET_TIME                                 ((VdpFuncId)62)
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#define VDP_FUNC_ID_PRESENTATION_QUEUE_DISPLAY                                  ((VdpFuncId)63)
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#define VDP_FUNC_ID_PRESENTATION_QUEUE_BLOCK_UNTIL_SURFACE_IDLE                 ((VdpFuncId)64)
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#define VDP_FUNC_ID_PRESENTATION_QUEUE_QUERY_SURFACE_STATUS                     ((VdpFuncId)65)
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#define VDP_FUNC_ID_PREEMPTION_CALLBACK_REGISTER                                ((VdpFuncId)66)
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#define VDP_FUNC_ID_DECODER_QUERY_CAPABILITY                                    ((VdpFuncId)67)

#define VDP_FUNC_ID_BASE_WINSYS 0x1000

/**
 * \brief Retrieve a VDPAU function pointer.
 * \param[in] device The device that the function will operate
 *       against.
 * \param[in] function_id The specific function to retrieve.
 * \param[out] function_pointer The actual pointer for the
 *       application to call.
 * \return VdpStatus The completion status of the operation.
 */
typedef VdpStatus VdpGetProcAddress(
    VdpDevice device,
    VdpFuncId function_id,
    /* output parameters follow */
    void * *  function_pointer
);

/** @} */
/** @} */

/**
 * \defgroup api_winsys Window System Integration Layer
 *
 * The set of VDPAU functionality specific to an individual
 * Windowing System.
 */

#ifdef __cplusplus
}
#endif

#endif