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/*
* FLV common header
*
* Copyright (c) 2006 The FFmpeg Project
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* FLV common header
*/
#ifndef AVFORMAT_FLV_H
#define AVFORMAT_FLV_H
/* offsets for packed values */
#define FLV_AUDIO_SAMPLESSIZE_OFFSET 1
#define FLV_AUDIO_SAMPLERATE_OFFSET 2
#define FLV_AUDIO_CODECID_OFFSET 4
#define FLV_VIDEO_FRAMETYPE_OFFSET 4
/* Extended VideoTagHeader
* defined in reference link:
* https://github.com/veovera/enhanced-rtmp/blob/main/enhanced-rtmp-v1.pdf
* */
#define FLV_IS_EX_HEADER 0x80
/* bitmasks to isolate specific values */
#define FLV_AUDIO_CHANNEL_MASK 0x01
#define FLV_AUDIO_SAMPLESIZE_MASK 0x02
#define FLV_AUDIO_SAMPLERATE_MASK 0x0c
#define FLV_AUDIO_CODECID_MASK 0xf0
#define FLV_VIDEO_CODECID_MASK 0x0f
#define FLV_VIDEO_FRAMETYPE_MASK 0x70
#define AMF_END_OF_OBJECT 0x09
#define KEYFRAMES_TAG "keyframes"
#define KEYFRAMES_TIMESTAMP_TAG "times"
#define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
enum {
FLV_HEADER_FLAG_HASVIDEO = 1,
FLV_HEADER_FLAG_HASAUDIO = 4,
};
enum FlvTagType {
FLV_TAG_TYPE_AUDIO = 0x08,
FLV_TAG_TYPE_VIDEO = 0x09,
FLV_TAG_TYPE_META = 0x12,
};
enum {
FLV_STREAM_TYPE_VIDEO,
FLV_STREAM_TYPE_AUDIO,
FLV_STREAM_TYPE_SUBTITLE,
FLV_STREAM_TYPE_DATA,
FLV_STREAM_TYPE_NB,
};
enum {
FLV_MONO = 0,
FLV_STEREO = 1,
};
enum {
FLV_SAMPLESSIZE_8BIT = 0,
FLV_SAMPLESSIZE_16BIT = 1 << FLV_AUDIO_SAMPLESSIZE_OFFSET,
};
enum {
FLV_SAMPLERATE_SPECIAL = 0, /**< signifies 5512Hz and 8000Hz in the case of NELLYMOSER */
FLV_SAMPLERATE_11025HZ = 1 << FLV_AUDIO_SAMPLERATE_OFFSET,
FLV_SAMPLERATE_22050HZ = 2 << FLV_AUDIO_SAMPLERATE_OFFSET,
FLV_SAMPLERATE_44100HZ = 3 << FLV_AUDIO_SAMPLERATE_OFFSET,
};
enum {
FLV_CODECID_PCM = 0,
FLV_CODECID_ADPCM = 1 << FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_MP3 = 2 << FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_PCM_LE = 3 << FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_NELLYMOSER_16KHZ_MONO = 4 << FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_NELLYMOSER_8KHZ_MONO = 5 << FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_NELLYMOSER = 6 << FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_PCM_ALAW = 7 << FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_PCM_MULAW = 8 << FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_AAC = 10<< FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_SPEEX = 11<< FLV_AUDIO_CODECID_OFFSET,
};
enum {
FLV_CODECID_H263 = 2,
FLV_CODECID_SCREEN = 3,
FLV_CODECID_VP6 = 4,
FLV_CODECID_VP6A = 5,
FLV_CODECID_SCREEN2 = 6,
FLV_CODECID_H264 = 7,
FLV_CODECID_REALH263= 8,
FLV_CODECID_MPEG4 = 9,
};
enum {
PacketTypeSequenceStart = 0,
PacketTypeCodedFrames = 1,
PacketTypeSequenceEnd = 2,
PacketTypeCodedFramesX = 3,
PacketTypeMetadata = 4,
PacketTypeMPEG2TSSequenceStart = 5,
};
enum {
FLV_FRAME_KEY = 1 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< key frame (for AVC, a seekable frame)
FLV_FRAME_INTER = 2 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< inter frame (for AVC, a non-seekable frame)
FLV_FRAME_DISP_INTER = 3 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< disposable inter frame (H.263 only)
FLV_FRAME_GENERATED_KEY = 4 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< generated key frame (reserved for server use only)
FLV_FRAME_VIDEO_INFO_CMD = 5 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< video info/command frame
};
typedef enum {
AMF_DATA_TYPE_NUMBER = 0x00,
AMF_DATA_TYPE_BOOL = 0x01,
AMF_DATA_TYPE_STRING = 0x02,
AMF_DATA_TYPE_OBJECT = 0x03,
AMF_DATA_TYPE_NULL = 0x05,
AMF_DATA_TYPE_UNDEFINED = 0x06,
AMF_DATA_TYPE_REFERENCE = 0x07,
AMF_DATA_TYPE_MIXEDARRAY = 0x08,
AMF_DATA_TYPE_OBJECT_END = 0x09,
AMF_DATA_TYPE_ARRAY = 0x0a,
AMF_DATA_TYPE_DATE = 0x0b,
AMF_DATA_TYPE_LONG_STRING = 0x0c,
AMF_DATA_TYPE_UNSUPPORTED = 0x0d,
} AMFDataType;
#endif /* AVFORMAT_FLV_H */
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