/*****************************************************************************
 * video_output.h
 *****************************************************************************
 * Copyright (C) 2012-2015 L-SMASH Works project
 *
 * Authors: Yusuke Nakamura <muken.the.vfrmaniac@gmail.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *****************************************************************************/

/* This file is available under an ISC license. */

#define REPEAT_CONTROL_CACHE_NUM 2

#define LW_FRAME_PROP_CHANGE_FLAG_WIDTH        (1<<0)
#define LW_FRAME_PROP_CHANGE_FLAG_HEIGHT       (1<<1)
#define LW_FRAME_PROP_CHANGE_FLAG_PIXEL_FORMAT (1<<2)
#define LW_FRAME_PROP_CHANGE_FLAG_COLORSPACE   (1<<3)
#define LW_FRAME_PROP_CHANGE_FLAG_YUV_RANGE    (1<<4)

typedef struct
{
    int                scaler_flags;
    int                frame_prop_change_flags;
    int                input_width;
    int                input_height;
    enum AVPixelFormat input_pixel_format;
    enum AVPixelFormat output_pixel_format;
    enum AVColorSpace  input_colorspace;
    int                input_yuv_range;
    struct SwsContext *sws_ctx;
} lw_video_scaler_handler_t;

typedef struct
{
    uint32_t top;
    uint32_t bottom;
} lw_video_frame_order_t;

typedef struct
{
    lw_video_scaler_handler_t scaler;
    int                       output_width;
    int                       output_height;
    /* VFR->CFR conversion */
    int                       vfr2cfr;
    uint32_t                  cfr_num;
    uint32_t                  cfr_den;
    /* Repeat control */
    int                       repeat_control;
    int64_t                   repeat_correction_ts;
    uint32_t                  frame_count;
    uint32_t                  frame_order_count;
    lw_video_frame_order_t   *frame_order_list;
    AVFrame                  *frame_cache_buffers[REPEAT_CONTROL_CACHE_NUM];
    uint32_t                  frame_cache_numbers[REPEAT_CONTROL_CACHE_NUM];
    /* Application private extension */
    void                     *private_handler;
    void (*free_private_handler)( void *private_handler );
} lw_video_output_handler_t;

int avoid_yuv_scale_conversion( enum AVPixelFormat *pixel_format );

void setup_video_rendering
(
    lw_video_output_handler_t *vohp,
    int                        scaler_flags,
    int                        width,
    int                        height,
    enum AVPixelFormat         output_pixel_format,
    struct AVCodecContext     *ctx,
    int (*dr_get_buffer)( struct AVCodecContext *, AVFrame *, int )
);

/* Return 0 if no update.
 * Return 1 if any update.
 * Retunr a negative value otherwise. */
int update_scaler_configuration_if_needed
(
    lw_video_scaler_handler_t *vshp,
    lw_log_handler_t          *lhp,
    const AVFrame             *av_frame
);

void lw_cleanup_video_output_handler
(
    lw_video_output_handler_t *vohp
);