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/*****************************************************************
* gmerlin-avdecoder - a general purpose multimedia decoding library
*
* Copyright (c) 2001 - 2024 Members of the Gmerlin project
* http://github.com/bplaum
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
#ifndef BGAV_MPV_HEADER_H_INCLUDED
#define BGAV_MPV_HEADER_H_INCLUDED
#define MPV_PROBE_SIZE 5 /* Sync code + extension type */
#define MPEG_CODE_SEQUENCE 1
#define MPEG_CODE_SEQUENCE_EXT 2
#define MPEG_CODE_PICTURE 3
#define MPEG_CODE_PICTURE_EXT 4
#define MPEG_CODE_GOP 5
#define MPEG_CODE_SLICE 6
#define MPEG_CODE_END 7
#define MPEG_CODE_SEQUENCE_DISPLAY_EXT 8
#define MPEG_CODE_EXTENSION 9
#define MPEG_PICTURE_TOP_FIELD 1
#define MPEG_PICTURE_BOTTOM_FIELD 2
#define MPEG_PICTURE_FRAME 3
const uint8_t * bgav_mpv_find_startcode( const uint8_t *p,
const uint8_t *end );
int bgav_mpv_get_start_code(const uint8_t * data, int get_ext);
void bgav_mpv_get_framerate(int code, uint32_t * timescale, uint32_t *frame_duration);
/*
* Return values of the parse functions:
* 0: Not enough data
* -1: Parse error
* 1: Success
*/
typedef struct
{
int profile_level_id;
int progressive_sequence;
int chroma_format;
int horizontal_size_ext;
int vertical_size_ext;
uint32_t bitrate_ext;
int timescale_ext;
int frame_duration_ext;
int low_delay;
int vbv_buffer_size_ext;
} bgav_mpv_sequence_extension_t;
typedef struct
{
int video_format;
int has_color_description;
int color_primaries;
int transfer_characteristics;
int matrix_coefficients;
int display_width;
int display_height;
} bgav_mpv_sequence_display_extension_t;
typedef struct
{
int mpeg2;
int has_dpy_ext;
uint32_t bitrate; /* In 400 bits per second */
int horizontal_size_value;
int vertical_size_value;
int aspect_ratio;
int frame_rate_index;
int vbv_buffer_size_value;
bgav_mpv_sequence_extension_t ext;
bgav_mpv_sequence_display_extension_t dpy_ext;
} bgav_mpv_sequence_header_t;
int bgav_mpv_sequence_header_parse(bgav_mpv_sequence_header_t *,
const uint8_t * buffer, int len);
int bgav_mpv_sequence_display_extension_parse(bgav_mpv_sequence_display_extension_t *,
const uint8_t * buffer, int len);
int bgav_mpv_sequence_extension_parse(bgav_mpv_sequence_extension_t *,
const uint8_t * buffer, int len);
typedef struct
{
int top_field_first;
int repeat_first_field;
int progressive_frame;
int picture_structure;
} bgav_mpv_picture_extension_t;
typedef struct
{
int coding_type;
bgav_mpv_picture_extension_t ext;
} bgav_mpv_picture_header_t;
int bgav_mpv_picture_header_parse(bgav_mpv_picture_header_t *,
const uint8_t * buffer, int len);
int bgav_mpv_picture_extension_parse(bgav_mpv_picture_extension_t *,
const uint8_t * buffer, int len);
typedef struct
{
int drop;
int hours;
int minutes;
int seconds;
int frames;
} bgav_mpv_gop_header_t;
int bgav_mpv_gop_header_parse(bgav_mpv_gop_header_t *,
const uint8_t * buffer, int len);
/* Getting the pixel aspect ratio is a bit messy... */
void bgav_mpv_get_pixel_aspect(bgav_mpv_sequence_header_t * h,
gavl_video_format_t * ret);
gavl_pixelformat_t bgav_mpv_get_pixelformat(bgav_mpv_sequence_header_t * h);
void bgav_mpv_get_size(bgav_mpv_sequence_header_t * h,
gavl_video_format_t * ret);
#endif // BGAV_MPV_HEADER_H_INCLUDED
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