1/* 2 * RIFF common functions and data 3 * copyright (c) 2000 Fabrice Bellard 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22/** 23 * @file 24 * internal header for RIFF based (de)muxers 25 * do NOT include this in end user applications 26 */ 27 28#ifndef AVFORMAT_RIFF_H 29#define AVFORMAT_RIFF_H 30 31#include "libavcodec/avcodec.h" 32#include "avio.h" 33#include "internal.h" 34#include "metadata.h" 35 36extern const AVMetadataConv ff_riff_info_conv[]; 37 38int64_t ff_start_tag(AVIOContext *pb, const char *tag); 39void ff_end_tag(AVIOContext *pb, int64_t start); 40 41/** 42 * Read BITMAPINFOHEADER structure and set AVStream codec width, height and 43 * bits_per_encoded_sample fields. Does not read extradata. 44 * @return codec tag 45 */ 46int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize); 47 48void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf, int ignore_extradata); 49 50/** 51 * Tell ff_put_wav_header() to use WAVEFORMATEX even for PCM codecs. 52 */ 53#define FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX 0x00000001 54 55/** 56 * Write WAVEFORMAT header structure. 57 * 58 * @param flags a combination of FF_PUT_WAV_HEADER_* constants 59 * 60 * @return the size or -1 on error 61 */ 62int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc, int flags); 63 64enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps); 65int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size); 66 67extern const AVCodecTag ff_codec_bmp_tags[]; // exposed through avformat_get_riff_video_tags() 68extern const AVCodecTag ff_codec_wav_tags[]; 69 70void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale); 71 72int ff_read_riff_info(AVFormatContext *s, int64_t size); 73 74/** 75 * Write all recognized RIFF tags from s->metadata 76 */ 77void ff_riff_write_info(AVFormatContext *s); 78 79/** 80 * Write a single RIFF info tag 81 */ 82void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str); 83 84typedef uint8_t ff_asf_guid[16]; 85 86typedef struct AVCodecGuid { 87 enum AVCodecID id; 88 ff_asf_guid guid; 89} AVCodecGuid; 90 91extern const AVCodecGuid ff_codec_wav_guids[]; 92 93#define FF_PRI_GUID \ 94 "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x" 95 96#define FF_ARG_GUID(g) \ 97 g[0], g[1], g[2], g[3], g[4], g[5], g[6], g[7], \ 98 g[8], g[9], g[10], g[11], g[12], g[13], g[14], g[15] 99 100#define FF_MEDIASUBTYPE_BASE_GUID \ 101 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71 102 103static av_always_inline int ff_guidcmp(const void *g1, const void *g2) 104{ 105 return memcmp(g1, g2, sizeof(ff_asf_guid)); 106} 107 108int ff_get_guid(AVIOContext *s, ff_asf_guid *g); 109void ff_put_guid(AVIOContext *s, const ff_asf_guid *g); 110const ff_asf_guid *get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid); 111 112enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid); 113 114#endif /* AVFORMAT_RIFF_H */ 115