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
54enum {
55    FLV_HEADER_FLAG_HASVIDEO = 1,
56    FLV_HEADER_FLAG_HASAUDIO = 4,
57};
58
59enum {
60    FLV_TAG_TYPE_AUDIO = 0x08,
61    FLV_TAG_TYPE_VIDEO = 0x09,
62    FLV_TAG_TYPE_META  = 0x12,
63};
64
65enum {
66    FLV_STREAM_TYPE_VIDEO,
67    FLV_STREAM_TYPE_AUDIO,
68    FLV_STREAM_TYPE_DATA,
69    FLV_STREAM_TYPE_NB,
70};
71
72enum {
73    FLV_MONO   = 0,
74    FLV_STEREO = 1,
75};
76
77enum {
78    FLV_SAMPLESSIZE_8BIT  = 0,
79    FLV_SAMPLESSIZE_16BIT = 1 << FLV_AUDIO_SAMPLESSIZE_OFFSET,
80};
81
82enum {
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
89enum {
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
103enum {
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
114enum {
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
122typedef 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