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  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(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int size, int big_endian);
  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 *ff_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 */
  118.