C++ VideoDecoder::DecodePacket方法代码示例

/****************************************
* RecVideo
*	Obtiene los packetes y los muestra
*****************************************/
int MediaBridgeSession::RecVideo()
{
	//Coders
	VideoDecoder* decoder = NULL;
	VideoEncoder* encoder = VideoCodecFactory::CreateEncoder(VideoCodec::SORENSON);
	//Create new video frame
	RTMPVideoFrame  frame(0,262143);
	//Set codec
	frame.SetVideoCodec(RTMPVideoFrame::FLV1);

	int 	width=0;
	int 	height=0;
	DWORD	numpixels=0;

	Log(">RecVideo\n");

	//Mientras tengamos que capturar
	while(receivingVideo)
	{
		///Obtenemos el paquete
		RTPPacket* packet = rtpVideo.GetPacket();

		//Check
		if (!packet)
			//Next
			continue;

		//Get type
		VideoCodec::Type type = (VideoCodec::Type)packet->GetCodec();


		if ((decoder==NULL) || (type!=decoder->type))
		{
			//Si habia uno nos lo cargamos
			if (decoder!=NULL)
				delete decoder;

			//Creamos uno dependiendo del tipo
			decoder = VideoCodecFactory::CreateDecoder(type);

			//Check
			if (!decoder)
			{
				delete(packet);
				continue;
			}
		}

		//Lo decodificamos
		if(!decoder->DecodePacket(packet->GetMediaData(),packet->GetMediaLength(),0,packet->GetMark()))
		{
			delete(packet);
			continue;
		}
		//Get mark
		bool mark = packet->GetMark();

		//Delete packet
		delete(packet);

		//Check if it is last one
		if(!mark)
			continue;

		//Check size
		if (decoder->GetWidth()!=width || decoder->GetHeight()!=height)
		{
			//Get dimension
			width = decoder->GetWidth();
			height = decoder->GetHeight();

			//Set size
			numpixels = width*height*3/2;

			//Set also frame rate and bps
			encoder->SetFrameRate(25,300,500);

			//Set them in the encoder
			encoder->SetSize(width,height);
		}

		//Encode next frame
		VideoFrame *encoded = encoder->EncodeFrame(decoder->GetFrame(),numpixels);

		//Check
		if (!encoded)
			break;

		//Check size
		if (frame.GetMaxMediaSize()<encoded->GetLength())
			//Not enougth space
			return Error("Not enought space to copy FLV encodec frame [frame:%d,encoded:%d",frame.GetMaxMediaSize(),encoded->GetLength());

		//Get full frame
		frame.SetVideoFrame(encoded->GetData(),encoded->GetLength());

//.........这里部分代码省略.........

//.........这里部分代码省略.........
			}
			//Update primary redundant payload
			buffer = red->GetPrimaryPayloadData();
			size = red->GetPrimaryPayloadSize();
		}
		
		//Check codecs
		if ((videoDecoder==NULL) || (type!=videoDecoder->type))
		{
			//If we already got one
			if (videoDecoder!=NULL)
				//Delete it
				delete videoDecoder;

			//Create video decorder for codec
			videoDecoder = VideoCodecFactory::CreateDecoder(type);

			//Check
			if (videoDecoder==NULL)
			{
				Error("Error creando nuevo decodificador de video [%d]\n",type);
				//Delete packet
				delete(packet);
				//Next
				continue;
			}
		}

		//Check if we have lost the last packet from the previous frame by comparing both timestamps
		if (ts>frameTime)
		{
			Debug("-lost mark packet ts:%u frameTime:%u\n",ts,frameTime);
			//Try to decode what is in the buffer
			videoDecoder->DecodePacket(NULL,0,1,1);
			//Get picture
			BYTE *frame = videoDecoder->GetFrame();
			DWORD width = videoDecoder->GetWidth();
			DWORD height = videoDecoder->GetHeight();
			//Check values
			if (frame && width && height)
			{
				//Set frame size
				videoOutput->SetVideoSize(width,height);

				//Check if muted
				if (!muted)
					//Send it
					videoOutput->NextFrame(frame);
			}
		}
		
		//Update frame time
		frameTime = ts;
		
		//Decode packet
		if(!videoDecoder->DecodePacket(buffer,size,lost,packet->GetMark()))
		{
			//Check if we got listener and more than 1/2 seconds have elapsed from last request
			if (listener && getDifTime(&lastFPURequest)>minFPUPeriod)
			{
				//Debug
				Log("-Requesting FPU decoder error\n");
				//Reset count
				lostCount = 0;
				//Request it
				listener->onRequestFPU();