libavformat/flv.h

   1 /**
   2  * @file flv.h
   3  * FLV common header
   4  *
   5  * Copyright (c) 2006 The FFmpeg Project.
   6  *
   7  * This file is part of FFmpeg.
   8  *
   9  * FFmpeg is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * FFmpeg is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with FFmpeg; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #ifndef FFMPEG_FLV_H
  25 #define FFMPEG_FLV_H
  26
  27 /* offsets for packed values */
  28 #define FLV_AUDIO_SAMPLESSIZE_OFFSET 1
  29 #define FLV_AUDIO_SAMPLERATE_OFFSET  2
  30 #define FLV_AUDIO_CODECID_OFFSET     4
  31
  32 #define FLV_VIDEO_FRAMETYPE_OFFSET   4
  33
  34 /* bitmasks to isolate specific values */
  35 #define FLV_AUDIO_CHANNEL_MASK    0x01
  36 #define FLV_AUDIO_SAMPLESIZE_MASK 0x02
  37 #define FLV_AUDIO_SAMPLERATE_MASK 0x0c
  38 #define FLV_AUDIO_CODECID_MASK    0xf0
  39
  40 #define FLV_VIDEO_CODECID_MASK    0x0f
  41 #define FLV_VIDEO_FRAMETYPE_MASK  0xf0
  42
  43 #define AMF_END_OF_OBJECT         0x09
  44
  45 enum {
  46     FLV_HEADER_FLAG_HASVIDEO = 1,
  47     FLV_HEADER_FLAG_HASAUDIO = 4,
  48 };
  49
  50 enum {
  51     FLV_TAG_TYPE_AUDIO = 0x08,
  52     FLV_TAG_TYPE_VIDEO = 0x09,
  53     FLV_TAG_TYPE_META  = 0x12,
  54 };
  55
  56 enum {
  57     FLV_MONO   = 0,
  58     FLV_STEREO = 1,
  59 };
  60
  61 enum {
  62     FLV_SAMPLESSIZE_8BIT  = 0,
  63     FLV_SAMPLESSIZE_16BIT = 1 << FLV_AUDIO_SAMPLESSIZE_OFFSET,
  64 };
  65
  66 enum {
  67     FLV_SAMPLERATE_SPECIAL = 0, /**< signifies 5512Hz and 8000Hz in the case of NELLYMOSER */
  68     FLV_SAMPLERATE_11025HZ = 1 << FLV_AUDIO_SAMPLERATE_OFFSET,
  69     FLV_SAMPLERATE_22050HZ = 2 << FLV_AUDIO_SAMPLERATE_OFFSET,
  70     FLV_SAMPLERATE_44100HZ = 3 << FLV_AUDIO_SAMPLERATE_OFFSET,
  71 };
  72
  73 enum {
  74     FLV_CODECID_PCM                 = 0,
  75     FLV_CODECID_ADPCM               = 1 << FLV_AUDIO_CODECID_OFFSET,
  76     FLV_CODECID_MP3                 = 2 << FLV_AUDIO_CODECID_OFFSET,
  77     FLV_CODECID_PCM_LE              = 3 << FLV_AUDIO_CODECID_OFFSET,
  78     FLV_CODECID_NELLYMOSER_8HZ_MONO = 5 << FLV_AUDIO_CODECID_OFFSET,
  79     FLV_CODECID_NELLYMOSER          = 6 << FLV_AUDIO_CODECID_OFFSET,
  80     FLV_CODECID_AAC                 = 10<< FLV_AUDIO_CODECID_OFFSET,
  81 };
  82
  83 enum {
  84     FLV_CODECID_H263    = 2,
  85     FLV_CODECID_SCREEN  = 3,
  86     FLV_CODECID_VP6     = 4,
  87     FLV_CODECID_VP6A    = 5,
  88     FLV_CODECID_SCREEN2 = 6,
  89     FLV_CODECID_H264    = 7,
  90 };
  91
  92 enum {
  93     FLV_FRAME_KEY        = 1 << FLV_VIDEO_FRAMETYPE_OFFSET,
  94     FLV_FRAME_INTER      = 2 << FLV_VIDEO_FRAMETYPE_OFFSET,
  95     FLV_FRAME_DISP_INTER = 3 << FLV_VIDEO_FRAMETYPE_OFFSET,
  96 };
  97
  98 typedef enum {
  99     AMF_DATA_TYPE_NUMBER      = 0x00,
 100     AMF_DATA_TYPE_BOOL        = 0x01,
 101     AMF_DATA_TYPE_STRING      = 0x02,
 102     AMF_DATA_TYPE_OBJECT      = 0x03,
 103     AMF_DATA_TYPE_NULL        = 0x05,
 104     AMF_DATA_TYPE_UNDEFINED   = 0x06,
 105     AMF_DATA_TYPE_REFERENCE   = 0x07,
 106     AMF_DATA_TYPE_MIXEDARRAY  = 0x08,
 107     AMF_DATA_TYPE_ARRAY       = 0x0a,
 108     AMF_DATA_TYPE_DATE        = 0x0b,
 109     AMF_DATA_TYPE_UNSUPPORTED = 0x0d,
 110 } AMFDataType;
 111
 112 #endif /* FFMPEG_FLV_H */