Method processImage

sources/utils/FrameDecoder.cpp:185–491

void FrameDecoder::processImage(
	int _cropLeft, int _cropRight, int _cropTop, int _cropBottom,
	const uint8_t* data, const uint8_t* dataUV, int width, int height, int lineLength,
	const PixelFormat pixelFormat, const uint8_t* lutBuffer, Image<ColorRgb>& outputImage, bool toneMapping)
{
	uint32_t ind_lutd, ind_lutd2;
	uint8_t  buffer[8];

	// validate format
	if (pixelFormat != PixelFormat::YUYV && pixelFormat != PixelFormat::UYVY &&
		pixelFormat != PixelFormat::XRGB && pixelFormat != PixelFormat::RGB24 &&
		pixelFormat != PixelFormat::I420 && pixelFormat != PixelFormat::NV12 && pixelFormat != PixelFormat::P010 && pixelFormat != PixelFormat::MJPEG)
	{
		Error(Logger::getInstance("FrameDecoder"), "Invalid pixel format given");
		return;
	}

	// validate format LUT
	if ((pixelFormat == PixelFormat::YUYV || pixelFormat == PixelFormat::UYVY || pixelFormat == PixelFormat::I420 || pixelFormat == PixelFormat::MJPEG ||
		pixelFormat == PixelFormat::NV12 || pixelFormat == PixelFormat::P010) && lutBuffer == NULL)
	{
		Error(Logger::getInstance("FrameDecoder"), "Missing LUT table for YUV colorspace");
		return;
	}

	// sanity check, odd values doesnt work for yuv either way
	_cropLeft = (_cropLeft >> 1) << 1;
	_cropRight = (_cropRight >> 1) << 1;

	// calculate the output size
	int outputWidth = (width - _cropLeft - _cropRight);
	int outputHeight = (height - _cropTop - _cropBottom);

	outputImage.resize(outputWidth, outputHeight);
	outputImage.setOriginFormat(pixelFormat);

	uint8_t* destMemory = outputImage.rawMem();
	int 		destLineSize = outputImage.width() * 3;


	if (pixelFormat == PixelFormat::YUYV)
	{
		for (int yDest = 0, ySource = _cropTop; yDest < outputHeight; ++ySource, ++yDest)
		{
			uint8_t* currentDest = destMemory + ((uint64_t)destLineSize) * yDest;
			uint8_t* endDest = currentDest + destLineSize;
			uint8_t* currentSource = (uint8_t*)data + (((uint64_t)lineLength * ySource) + (((uint64_t)_cropLeft) << 1));

			while (currentDest < endDest)
			{
				*((uint32_t*)&buffer) = *((uint32_t*)currentSource);

				ind_lutd = LUT_INDEX(buffer[0], buffer[1], buffer[3]);
				ind_lutd2 = LUT_INDEX(buffer[2], buffer[1], buffer[3]);

				*((uint32_t*)currentDest) = *((uint32_t*)(&lutBuffer[ind_lutd]));
				currentDest += 3;
				*((uint32_t*)currentDest) = *((uint32_t*)(&lutBuffer[ind_lutd2]));