1 /*
2  * GStreamer
3  * Copyright (C) 2009 Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com>
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Library General Public
7  * License as published by the Free Software Foundation; either
8  * version 2 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * Library General Public License for more details.
14  *
15  * You should have received a copy of the GNU Library General Public
16  * License along with this library; if not, write to the
17  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18  * Boston, MA 02110-1301, USA.
19  */
20 
21 #ifndef __GST_VDP_MPEG_DEC_H__
22 #define __GST_VDP_MPEG_DEC_H__
23 
24 #include <gst/gst.h>
25 #include <gst/base/gstadapter.h>
26 
27 #include "../gstvdpdecoder.h"
28 
29 G_BEGIN_DECLS
30 typedef struct _GstVdpMpegStreamInfo GstVdpMpegStreamInfo;
31 
32 struct _GstVdpMpegStreamInfo
33 {
34   gint width, height;
35   gint fps_n, fps_d;
36   gint par_n, par_d;
37   gboolean interlaced;
38   gint version;
39   VdpDecoderProfile profile;
40 };
41 
42 #define GST_TYPE_VDP_MPEG_DEC            (gst_vdp_mpeg_dec_get_type())
43 #define GST_VDP_MPEG_DEC(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VDP_MPEG_DEC,GstVdpMpegDec))
44 #define GST_VDP_MPEG_DEC_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VDP_MPEG_DEC,GstVdpMpegDecClass))
45 #define GST_IS_VDP_MPEG_DEC(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VDP_MPEG_DEC))
46 #define GST_IS_VDP_MPEG_DEC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VDP_MPEG_DEC))
47 
48 typedef enum {
49   GST_VDP_MPEG_DEC_STATE_NEED_SEQUENCE,
50   GST_VDP_MPEG_DEC_STATE_NEED_GOP,
51   GST_VDP_MPEG_DEC_STATE_NEED_DATA
52 } GstVdpMpegDecState;
53 
54 typedef struct _GstVdpMpegDec      GstVdpMpegDec;
55 typedef struct _GstVdpMpegDecClass GstVdpMpegDecClass;
56 
57 struct _GstVdpMpegDec
58 {
59   GstVdpDecoder vdp_decoder;
60 
61   VdpDecoder decoder;
62 
63   GstVdpMpegStreamInfo stream_info;
64 
65   /* decoder state */
66   GstVideoCodecState *input_state;
67   GstVideoCodecState *output_state;
68   GstVdpMpegDecState state;
69   gint prev_packet;
70 
71   /* currently decoded frame info */
72   VdpPictureInfoMPEG1Or2 vdp_info;
73   guint64 frame_nr;
74 
75   /* frame_nr from GOP */
76   guint64 gop_frame;
77 
78   /* forward and backward reference */
79   GstVideoCodecFrame *f_frame, *b_frame;
80 };
81 
82 struct _GstVdpMpegDecClass
83 {
84   GstVdpDecoderClass vdp_decoder_class;
85 };
86 
87 GType gst_vdp_mpeg_dec_get_type (void);
88 
89 G_END_DECLS
90 
91 #endif /* __GST_VDP_MPEG_DEC_H__ */
92