public bool CanHandleData(ByteBuffer data) {
if (data.Limit == 0)
return false;// Empty buffer
byte first = data.Get();
bool result = ((first & 0x0f) == VideoCodec.AVC.Id);
data.Rewind();
return result;
}
public bool AddData(ByteBuffer data) {
if (data.Limit == 0)
return true;
if (!CanHandleData(data))
return false;
data.Rewind();
byte frameType = data.Get();
data.Rewind();
if ((frameType & 0xf0) != VideoCodec.FLV_FRAME_KEY)
return true;// Not a keyframe
//If we don't have the AVCDecoderConfigurationRecord stored...
if (_blockDataAVCDCR == null) {
data.Get();//FT
data.Get();//CODECID
byte AVCPacketType = data.Get();
//Sequence Header / here comes a AVCDecoderConfigurationRecord
if (log.IsDebugEnabled)
log.Debug(string.Format("AVCPacketType: {0}", AVCPacketType));
if (AVCPacketType == 0) {
data.Rewind();
// Store AVCDecoderConfigurationRecord data
_dataCountAVCDCR = data.Limit;
if (_blockSizeAVCDCR < _dataCountAVCDCR) {
_blockSizeAVCDCR = _dataCountAVCDCR;
_blockDataAVCDCR = new byte[_blockSizeAVCDCR];
}
data.Read(_blockDataAVCDCR, 0, _dataCountAVCDCR);
}
}
data.Rewind();
// Store last keyframe
_dataCountLKF = data.Limit;
if (_blockSizeLKF < _dataCountLKF) {
_blockSizeLKF = _dataCountLKF;
_blockDataLKF = new byte[_blockSizeLKF];
}
data.Read(_blockDataLKF, 0, _dataCountLKF);
data.Rewind();
return true;
}