libavformat/flv.h

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#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_MONO   = 0,
    FLV_STEREO = 1,
};

enum {
    FLV_SAMPLESSIZE_8BIT  = 0,
    FLV_SAMPLESSIZE_16BIT = 1 << FLV_AUDIO_SAMPLESSIZE_OFFSET,
};

enum {
    FLV_SAMPLERATE_SPECIAL = 0, 
    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,
};

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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