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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

/* 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 0xf0

#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 {
    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_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_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 {
    FLV_FRAME_KEY = 1 << FLV_VIDEO_FRAMETYPE_OFFSET,
    FLV_FRAME_INTER = 2 << FLV_VIDEO_FRAMETYPE_OFFSET,
    FLV_FRAME_DISP_INTER = 3 << FLV_VIDEO_FRAMETYPE_OFFSET,
};

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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