chromium/third_party/ffmpeg/libavformat/riffdec.c

/*
 * RIFF demuxing 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
 */

#include "libavutil/avassert.h"
#include "libavutil/dict.h"
#include "libavutil/error.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "avformat.h"
#include "avio_internal.h"
#include "demux.h"
#include "riff.h"

int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
{ … }

enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
{ … }

/* We could be given one of the three possible structures here:
 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
 * is an expansion of the previous one with the fields added
 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
 * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
 * an openended structure.
 */

static void parse_waveformatex(void *logctx, AVIOContext *pb, AVCodecParameters *par)
{ … }

/* "big_endian" values are needed for RIFX file format */
int ff_get_wav_header(void *logctx, AVIOContext *pb,
                      AVCodecParameters *par, int size, int big_endian)
{ … }

enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
{ … }

int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size)
{ … }

int ff_read_riff_info(AVFormatContext *s, int64_t size)
{ … }