chromium/third_party/ffmpeg/libavformat/riff.h

/*
 * RIFF common functions and data
 * copyright (c) 2000 Fabrice Bellard
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * internal header for RIFF based (de)muxers
 * do NOT include this in end user applications
 */

#ifndef AVFORMAT_RIFF_H
#define AVFORMAT_RIFF_H

#include "avio.h"
#include "internal.h"
#include "metadata.h"

extern const AVMetadataConv ff_riff_info_conv[];

int64_t ff_start_tag(AVIOContext *pb, const char *tag);
void ff_end_tag(AVIOContext *pb, int64_t start);

/**
 * Read BITMAPINFOHEADER structure and set AVStream codec width, height and
 * bits_per_encoded_sample fields. Does not read extradata.
 * Writes the size of the BMP file to *size.
 * @return codec tag
 */
int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size);

void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par, int for_asf, int ignore_extradata, int rgb_frame_is_flipped);

/**
 * Tell ff_put_wav_header() to use WAVEFORMATEX even for PCM codecs.
 */
#define FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX …

/**
 * Tell ff_put_wav_header() to write an empty channel mask.
 */
#define FF_PUT_WAV_HEADER_SKIP_CHANNELMASK …

/**
 * Write WAVEFORMAT header structure.
 *
 * @param flags a combination of FF_PUT_WAV_HEADER_* constants
 *
 * @return the size or -1 on error
 */
int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int flags);

enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps);
int ff_get_wav_header(void *logctx, AVIOContext *pb, AVCodecParameters *par,
                      int size, int big_endian);

extern const AVCodecTag ff_codec_bmp_tags[]; // exposed through avformat_get_riff_video_tags()
extern const AVCodecTag ff_codec_wav_tags[];
/* The following list contains both ff_codec_bmp_tags and ff_codec_wav_tags. */
extern const AVCodecTag *const ff_riff_codec_tags_list[];
/* The following list contains only ff_codec_wav_tags. */
extern const AVCodecTag *const ff_wav_codec_tags_list[];

extern const AVCodecTag ff_codec_bmp_tags_unofficial[];

void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale);

int ff_read_riff_info(AVFormatContext *s, int64_t size);

/**
 * Write all recognized RIFF tags from s->metadata
 */
void ff_riff_write_info(AVFormatContext *s);

/**
 * Write a single RIFF info tag
 */
void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str);

ff_asf_guid;

AVCodecGuid;

extern const AVCodecGuid ff_codec_wav_guids[];

#define FF_PRI_GUID …

#define FF_ARG_GUID(g) …

#define FF_MEDIASUBTYPE_BASE_GUID …
#define FF_AMBISONIC_BASE_GUID …
#define FF_BROKEN_BASE_GUID …

static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
{ … }

int ff_get_guid(AVIOContext *s, ff_asf_guid *g);
void ff_put_guid(AVIOContext *s, const ff_asf_guid *g);
const ff_asf_guid *ff_get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid);

enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid);

#endif /* AVFORMAT_RIFF_H */