libavformat/flv.h
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00001 /*
00002  * FLV common header
00003  *
00004  * Copyright (c) 2006 The FFmpeg Project
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00028 #ifndef AVFORMAT_FLV_H
00029 #define AVFORMAT_FLV_H
00030 
00031 /* offsets for packed values */
00032 #define FLV_AUDIO_SAMPLESSIZE_OFFSET 1
00033 #define FLV_AUDIO_SAMPLERATE_OFFSET  2
00034 #define FLV_AUDIO_CODECID_OFFSET     4
00035 
00036 #define FLV_VIDEO_FRAMETYPE_OFFSET   4
00037 
00038 /* bitmasks to isolate specific values */
00039 #define FLV_AUDIO_CHANNEL_MASK    0x01
00040 #define FLV_AUDIO_SAMPLESIZE_MASK 0x02
00041 #define FLV_AUDIO_SAMPLERATE_MASK 0x0c
00042 #define FLV_AUDIO_CODECID_MASK    0xf0
00043 
00044 #define FLV_VIDEO_CODECID_MASK    0x0f
00045 #define FLV_VIDEO_FRAMETYPE_MASK  0xf0
00046 
00047 #define AMF_END_OF_OBJECT         0x09
00048 
00049 #define KEYFRAMES_TAG            "keyframes"
00050 #define KEYFRAMES_TIMESTAMP_TAG  "times"
00051 #define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
00052 
00053 
00054 enum {
00055     FLV_HEADER_FLAG_HASVIDEO = 1,
00056     FLV_HEADER_FLAG_HASAUDIO = 4,
00057 };
00058 
00059 enum {
00060     FLV_TAG_TYPE_AUDIO = 0x08,
00061     FLV_TAG_TYPE_VIDEO = 0x09,
00062     FLV_TAG_TYPE_META  = 0x12,
00063 };
00064 
00065 enum {
00066     FLV_STREAM_TYPE_VIDEO,
00067     FLV_STREAM_TYPE_AUDIO,
00068     FLV_STREAM_TYPE_DATA,
00069     FLV_STREAM_TYPE_NB,
00070 };
00071 
00072 enum {
00073     FLV_MONO   = 0,
00074     FLV_STEREO = 1,
00075 };
00076 
00077 enum {
00078     FLV_SAMPLESSIZE_8BIT  = 0,
00079     FLV_SAMPLESSIZE_16BIT = 1 << FLV_AUDIO_SAMPLESSIZE_OFFSET,
00080 };
00081 
00082 enum {
00083     FLV_SAMPLERATE_SPECIAL = 0, 
00084     FLV_SAMPLERATE_11025HZ = 1 << FLV_AUDIO_SAMPLERATE_OFFSET,
00085     FLV_SAMPLERATE_22050HZ = 2 << FLV_AUDIO_SAMPLERATE_OFFSET,
00086     FLV_SAMPLERATE_44100HZ = 3 << FLV_AUDIO_SAMPLERATE_OFFSET,
00087 };
00088 
00089 enum {
00090     FLV_CODECID_PCM                  = 0,
00091     FLV_CODECID_ADPCM                = 1 << FLV_AUDIO_CODECID_OFFSET,
00092     FLV_CODECID_MP3                  = 2 << FLV_AUDIO_CODECID_OFFSET,
00093     FLV_CODECID_PCM_LE               = 3 << FLV_AUDIO_CODECID_OFFSET,
00094     FLV_CODECID_NELLYMOSER_16KHZ_MONO = 4 << FLV_AUDIO_CODECID_OFFSET,
00095     FLV_CODECID_NELLYMOSER_8KHZ_MONO = 5 << FLV_AUDIO_CODECID_OFFSET,
00096     FLV_CODECID_NELLYMOSER           = 6 << FLV_AUDIO_CODECID_OFFSET,
00097     FLV_CODECID_AAC                  = 10<< FLV_AUDIO_CODECID_OFFSET,
00098     FLV_CODECID_SPEEX                = 11<< FLV_AUDIO_CODECID_OFFSET,
00099 };
00100 
00101 enum {
00102     FLV_CODECID_H263    = 2,
00103     FLV_CODECID_SCREEN  = 3,
00104     FLV_CODECID_VP6     = 4,
00105     FLV_CODECID_VP6A    = 5,
00106     FLV_CODECID_SCREEN2 = 6,
00107     FLV_CODECID_H264    = 7,
00108     FLV_CODECID_REALH263= 8,
00109     FLV_CODECID_MPEG4   = 9,
00110 };
00111 
00112 enum {
00113     FLV_FRAME_KEY        = 1 << FLV_VIDEO_FRAMETYPE_OFFSET,
00114     FLV_FRAME_INTER      = 2 << FLV_VIDEO_FRAMETYPE_OFFSET,
00115     FLV_FRAME_DISP_INTER = 3 << FLV_VIDEO_FRAMETYPE_OFFSET,
00116 };
00117 
00118 typedef enum {
00119     AMF_DATA_TYPE_NUMBER      = 0x00,
00120     AMF_DATA_TYPE_BOOL        = 0x01,
00121     AMF_DATA_TYPE_STRING      = 0x02,
00122     AMF_DATA_TYPE_OBJECT      = 0x03,
00123     AMF_DATA_TYPE_NULL        = 0x05,
00124     AMF_DATA_TYPE_UNDEFINED   = 0x06,
00125     AMF_DATA_TYPE_REFERENCE   = 0x07,
00126     AMF_DATA_TYPE_MIXEDARRAY  = 0x08,
00127     AMF_DATA_TYPE_OBJECT_END  = 0x09,
00128     AMF_DATA_TYPE_ARRAY       = 0x0a,
00129     AMF_DATA_TYPE_DATE        = 0x0b,
00130     AMF_DATA_TYPE_LONG_STRING = 0x0c,
00131     AMF_DATA_TYPE_UNSUPPORTED = 0x0d,
00132 } AMFDataType;
00133 
00134 #endif /* AVFORMAT_FLV_H */