C++ Frame::Format方法代码示例

void RenderThread::RenderFrames(FrameListPtr sourceFrames, YUV_PLANE plane)
{
	FrameImpl tempFrame;

	for (int i = 0; i < sourceFrames->size(); i++) 
	{
		FramePtr sourceFrameOrig = sourceFrames->at(i);
		if (!sourceFrameOrig)
		{
			continue;
		}
		unsigned int viewID = sourceFrameOrig->Info(VIEW_ID).toUInt();

		Frame* sourceFrame = sourceFrameOrig.data();
		float scaleX = 1;
		float scaleY = 1;
		if (plane != PLANE_COLOR)
		{
			COLOR_FORMAT c = sourceFrameOrig->Format()->Color();
			if (c == I420 || c == I422 || c == I444)
			{
				sourceFrame = &tempFrame;

				FormatPtr format = sourceFrameOrig->Format();
				sourceFrame->Format()->SetColor(Y800);
				sourceFrame->Format()->SetWidth(format->PlaneWidth(plane));
				sourceFrame->Format()->SetHeight(format->PlaneHeight(plane));
				sourceFrame->Format()->SetStride(0, format->Stride(plane));
				sourceFrame->Format()->PlaneSize(0);


				sourceFrame->SetData(0, sourceFrameOrig->Data(plane));

				scaleX = ((float)format->PlaneWidth(plane))/format->Width();
				scaleY = ((float)format->PlaneHeight(plane))/format->Height();
			}
		}
		
		int pos = -1;
		for (int k = 0; k < m_RenderFrames.size(); k++) 
		{
			FramePtr _frame = m_RenderFrames.at(k);
			if (_frame && _frame->Info(VIEW_ID).toUInt() == viewID)
			{
				pos = k;
				break;
			}
		}

		if (pos == -1)
		{
			pos = m_RenderFrames.size();
			m_RenderFrames.append(FramePtr());
		}

		FramePtr& renderFrame = m_RenderFrames[pos];
		// Deallocate if resolution changed
		if (renderFrame && (sourceFrame->Format()->Width() != 
			renderFrame->Format()->Width() || 
			sourceFrame->Format()->Height() != 
			renderFrame->Format()->Height()))
		{
			m_Renderer->Deallocate(renderFrame);
			renderFrame.clear();
		}

		// Allocate if needed
		if (!renderFrame)
		{
			m_Renderer->Allocate(renderFrame, sourceFrame->Format());
		}
		
		renderFrame->SetInfo(VIEW_ID, viewID);
		renderFrame->SetInfo(RENDER_SRC_SCALE_X, scaleX);
		renderFrame->SetInfo(RENDER_SRC_SCALE_Y, scaleY);

		// Render frame
		if (m_Renderer->GetFrame(renderFrame) == OK)
		{
			if (sourceFrame->Format() == renderFrame->Format())
			{
				for (int i=0; i<4; i++)
				{
					size_t len = renderFrame->Format()->PlaneSize(i);
					if (len > 0)
					{
						memcpy(renderFrame->Data(i), sourceFrame->Data(i), len);
					}
				}

			}else
			{
				ColorConversion(*sourceFrame, *renderFrame);
			}

			m_Renderer->ReleaseFrame(renderFrame);
		}
	}
}

void ColorConversion(const Frame& in, Frame& out)
{
	const FormatPtr format_in = in.Format();
	FormatPtr format_out = out.Format();

	int step_in[4];
	memcpy(step_in, format_in->Stride(), sizeof(step_in));

	unsigned char* data_in[4], *data_out[4];
	memcpy(data_in, in.Data(), sizeof(data_in));
	memcpy(data_out, out.Data(), sizeof(data_out));

	COLOR_FORMAT color_in  = format_in->Color();
	COLOR_FORMAT color_out = format_out->Color();

	if (color_in == IMC2)
	{
		color_in = YV12;
		data_in[2] = data_in[1]+format_in->Width()/2;
		step_in[2] = step_in[1];
	}else if (color_in == IMC4)
	{
		color_in = I420;
		data_in[2] = data_in[1]+format_in->Width()/2;
		step_in[2] = step_in[1];
	}else if (color_in == YVYU)
	{
		// Special case since ffmpeg converter doesn't have this by default
		// Swap chroma plans
		data_out[3] = data_out[1];
		data_out[1] = data_out[2];
		data_out[2] = data_out[3];
		data_out[3] = 0;
	}

	PrepareCC(color_in, data_in);
	PrepareCC(color_out, data_out);

	

	bool ok = false;
	if (!ok)
	{
		// Try FFMpeg conversion if framewave doesn't support the conversion
		struct SwsContext *ctx = sws_getContext(format_in->Width(), format_in->Height(),
			YT2FFMpegFormat(color_in), format_out->Width(), format_out->Height(),
			YT2FFMpegFormat(color_out),
			SWS_BILINEAR, NULL,NULL,NULL );
		if (ctx)
		{
			if (sws_scale( ctx, data_in, step_in, 0, format_in->Height(), data_out, format_out->Stride()) == format_out->Height())
			{
				ok = true;
			}
			sws_freeContext( ctx );
		}		
	}
	
	if (!ok)
	{
		// Fill with random data
		for (int i=0; i<4; i++)
		{
			for (int j=0; j<format_out->Stride(i)*format_out->Height(); j++)
			{
				data_out[i][j] = rand()*255/RAND_MAX;
			}
		}
	}

	out.SetPTS(in.PTS());
	out.SetFrameNumber(in.FrameNumber());
	for (int i=0; i<LAST_INFO_KEY; i++)
	{
		if (in.HasInfo((INFO_KEY)i))
		{
			out.SetInfo((INFO_KEY)i, in.Info((INFO_KEY)i));
		}
	}
}