ffmpeg/libavformat/riff.h

   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
  36 extern const AVMetadataConv ff_riff_info_conv[];
  37
  38 int64_t ff_start_tag(AVIOContext *pb, const char *tag);
  39 void 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  */
  46 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize);
  47
  48 void 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  */
  62 int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc, int flags);
  63
  64 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps);
  65 int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size);
  66
  67 extern const AVCodecTag ff_codec_bmp_tags[]; // exposed through avformat_get_riff_video_tags()
  68 extern const AVCodecTag ff_codec_wav_tags[];
  69
  70 void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale);
  71
  72 int ff_read_riff_info(AVFormatContext *s, int64_t size);
  73
  74 /**
  75  * Write all recognized RIFF tags from s->metadata
  76  */
  77 void ff_riff_write_info(AVFormatContext *s);
  78
  79 /**
  80  * Write a single RIFF info tag
  81  */
  82 void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str);
  83
  84 typedef uint8_t ff_asf_guid[16];
  85
  86 typedef struct AVCodecGuid {
  87     enum AVCodecID id;
  88     ff_asf_guid guid;
  89 } AVCodecGuid;
  90
  91 extern 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     "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x}"
  96
  97 #define FF_ARG_GUID(g) \
  98     g[0], g[1], g[2],  g[3],  g[4],  g[5],  g[6],  g[7], \
  99     g[8], g[9], g[10], g[11], g[12], g[13], g[14], g[15],\
 100     g[3], g[2], g[1],  g[0],  g[5],  g[4],  g[7],  g[6], \
 101     g[8], g[9], g[10], g[11], g[12], g[13], g[14], g[15]
 102
 103 #define FF_MEDIASUBTYPE_BASE_GUID \
 104     0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71
 105
 106 static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
 107 {
 108     return memcmp(g1, g2, sizeof(ff_asf_guid));
 109 }
 110
 111 int ff_get_guid(AVIOContext *s, ff_asf_guid *g);
 112 void ff_put_guid(AVIOContext *s, const ff_asf_guid *g);
 113 const ff_asf_guid *get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid);
 114
 115 enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid);
 116
 117 #endif /* AVFORMAT_RIFF_H */