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  1. /*
  2.  * FLV common header
  3.  *
  4.  * Copyright (c) 2006 The FFmpeg Project
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. /**
  24.  * @file
  25.  * FLV common header
  26.  */
  27.  
  28. #ifndef AVFORMAT_FLV_H
  29. #define AVFORMAT_FLV_H
  30.  
  31. /* offsets for packed values */
  32. #define FLV_AUDIO_SAMPLESSIZE_OFFSET 1
  33. #define FLV_AUDIO_SAMPLERATE_OFFSET  2
  34. #define FLV_AUDIO_CODECID_OFFSET     4
  35.  
  36. #define FLV_VIDEO_FRAMETYPE_OFFSET   4
  37.  
  38. /* bitmasks to isolate specific values */
  39. #define FLV_AUDIO_CHANNEL_MASK    0x01
  40. #define FLV_AUDIO_SAMPLESIZE_MASK 0x02
  41. #define FLV_AUDIO_SAMPLERATE_MASK 0x0c
  42. #define FLV_AUDIO_CODECID_MASK    0xf0
  43.  
  44. #define FLV_VIDEO_CODECID_MASK    0x0f
  45. #define FLV_VIDEO_FRAMETYPE_MASK  0xf0
  46.  
  47. #define AMF_END_OF_OBJECT         0x09
  48.  
  49. #define KEYFRAMES_TAG            "keyframes"
  50. #define KEYFRAMES_TIMESTAMP_TAG  "times"
  51. #define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
  52.  
  53.  
  54. enum {
  55.     FLV_HEADER_FLAG_HASVIDEO = 1,
  56.     FLV_HEADER_FLAG_HASAUDIO = 4,
  57. };
  58.  
  59. enum {
  60.     FLV_TAG_TYPE_AUDIO = 0x08,
  61.     FLV_TAG_TYPE_VIDEO = 0x09,
  62.     FLV_TAG_TYPE_META  = 0x12,
  63. };
  64.  
  65. enum {
  66.     FLV_STREAM_TYPE_VIDEO,
  67.     FLV_STREAM_TYPE_AUDIO,
  68.     FLV_STREAM_TYPE_DATA,
  69.     FLV_STREAM_TYPE_NB,
  70. };
  71.  
  72. enum {
  73.     FLV_MONO   = 0,
  74.     FLV_STEREO = 1,
  75. };
  76.  
  77. enum {
  78.     FLV_SAMPLESSIZE_8BIT  = 0,
  79.     FLV_SAMPLESSIZE_16BIT = 1 << FLV_AUDIO_SAMPLESSIZE_OFFSET,
  80. };
  81.  
  82. enum {
  83.     FLV_SAMPLERATE_SPECIAL = 0, /**< signifies 5512Hz and 8000Hz in the case of NELLYMOSER */
  84.     FLV_SAMPLERATE_11025HZ = 1 << FLV_AUDIO_SAMPLERATE_OFFSET,
  85.     FLV_SAMPLERATE_22050HZ = 2 << FLV_AUDIO_SAMPLERATE_OFFSET,
  86.     FLV_SAMPLERATE_44100HZ = 3 << FLV_AUDIO_SAMPLERATE_OFFSET,
  87. };
  88.  
  89. enum {
  90.     FLV_CODECID_PCM                  = 0,
  91.     FLV_CODECID_ADPCM                = 1 << FLV_AUDIO_CODECID_OFFSET,
  92.     FLV_CODECID_MP3                  = 2 << FLV_AUDIO_CODECID_OFFSET,
  93.     FLV_CODECID_PCM_LE               = 3 << FLV_AUDIO_CODECID_OFFSET,
  94.     FLV_CODECID_NELLYMOSER_16KHZ_MONO = 4 << FLV_AUDIO_CODECID_OFFSET,
  95.     FLV_CODECID_NELLYMOSER_8KHZ_MONO = 5 << FLV_AUDIO_CODECID_OFFSET,
  96.     FLV_CODECID_NELLYMOSER           = 6 << FLV_AUDIO_CODECID_OFFSET,
  97.     FLV_CODECID_PCM_ALAW             = 7 << FLV_AUDIO_CODECID_OFFSET,
  98.     FLV_CODECID_PCM_MULAW            = 8 << FLV_AUDIO_CODECID_OFFSET,
  99.     FLV_CODECID_AAC                  = 10<< FLV_AUDIO_CODECID_OFFSET,
  100.     FLV_CODECID_SPEEX                = 11<< FLV_AUDIO_CODECID_OFFSET,
  101. };
  102.  
  103. enum {
  104.     FLV_CODECID_H263    = 2,
  105.     FLV_CODECID_SCREEN  = 3,
  106.     FLV_CODECID_VP6     = 4,
  107.     FLV_CODECID_VP6A    = 5,
  108.     FLV_CODECID_SCREEN2 = 6,
  109.     FLV_CODECID_H264    = 7,
  110.     FLV_CODECID_REALH263= 8,
  111.     FLV_CODECID_MPEG4   = 9,
  112. };
  113.  
  114. enum {
  115.     FLV_FRAME_KEY            = 1 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< key frame (for AVC, a seekable frame)
  116.     FLV_FRAME_INTER          = 2 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< inter frame (for AVC, a non-seekable frame)
  117.     FLV_FRAME_DISP_INTER     = 3 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< disposable inter frame (H.263 only)
  118.     FLV_FRAME_GENERATED_KEY  = 4 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< generated key frame (reserved for server use only)
  119.     FLV_FRAME_VIDEO_INFO_CMD = 5 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< video info/command frame
  120. };
  121.  
  122. typedef enum {
  123.     AMF_DATA_TYPE_NUMBER      = 0x00,
  124.     AMF_DATA_TYPE_BOOL        = 0x01,
  125.     AMF_DATA_TYPE_STRING      = 0x02,
  126.     AMF_DATA_TYPE_OBJECT      = 0x03,
  127.     AMF_DATA_TYPE_NULL        = 0x05,
  128.     AMF_DATA_TYPE_UNDEFINED   = 0x06,
  129.     AMF_DATA_TYPE_REFERENCE   = 0x07,
  130.     AMF_DATA_TYPE_MIXEDARRAY  = 0x08,
  131.     AMF_DATA_TYPE_OBJECT_END  = 0x09,
  132.     AMF_DATA_TYPE_ARRAY       = 0x0a,
  133.     AMF_DATA_TYPE_DATE        = 0x0b,
  134.     AMF_DATA_TYPE_LONG_STRING = 0x0c,
  135.     AMF_DATA_TYPE_UNSUPPORTED = 0x0d,
  136. } AMFDataType;
  137.  
  138. #endif /* AVFORMAT_FLV_H */
  139.