YUV和RGB详解

https://juejin.im/post/5b4f2dab6fb9a04fc67bf265

https://www.jianshu.com/p/d9631596e9c7

https://zhuanlan.zhihu.com/p/24762605

https://www.jianshu.com/p/36ffaa905a43

https://developer.apple.com/documentation/accelerate/1533095-vimageconvert_420yp8_cbcr8toargb?language=objc

https://developer.apple.com/documentation/accelerate/vimage_ypcbcrpixelrange 

https://stackoverflow.com/questions/29490145/ios-using-vimage-accelerate-to-convert-qcar-yuv-to-rgb

CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
CVPixelBufferLockBaseAddress(imageBuffer,0);
size_t width = CVPixelBufferGetWidth(imageBuffer);
size_t height = CVPixelBufferGetHeight(imageBuffer);
uint8_t *yBuffer = CVPixelBufferGetBaseAddressOfPlane(imageBuffer, 0);
size_t yPitch = CVPixelBufferGetBytesPerRowOfPlane(imageBuffer, 0);
uint8_t *cbCrBuffer = CVPixelBufferGetBaseAddressOfPlane(imageBuffer, 1);
size_t cbCrPitch = CVPixelBufferGetBytesPerRowOfPlane(imageBuffer, 1);
void *srcYpData = malloc(height *yPitch);
memcpy(srcYpData, yBuffer, height *yPitch);
void *srcCbCrData = malloc(height *cbCrPitch);
memcpy(srcCbCrData, cbCrBuffer, height *cbCrPitch);
size_t aRgbPitch = width *  4;
uint8_t *aRgbBuffer = malloc(height *aRgbPitch);
memset(aRgbBuffer, 0, height *aRgbPitch);
vImage_Buffer srcYp = {srcYpData,height,width,yPitch};
vImage_Buffer srcCbCr = {srcCbCrData,height,width,cbCrPitch};
vImage_Buffer dest = {aRgbBuffer,height,width,aRgbPitch};
vImage_YpCbCrPixelRange pixelRange = {16,128,235,240,235,16,240,16};
vImage_YpCbCrToARGB infoYpCbCrToARGB = {};
vImage_Error error = vImageConvert_YpCbCrToARGB_GenerateConversion(kvImage_YpCbCrToARGBMatrix_ITU_R_601_4, &pixelRange, &infoYpCbCrToARGB, kvImage420Yp8_CbCr8, kvImageARGB8888, kvImageNoFlags);
uint8_t permuteMap[4] = {0, 1, 2, 3};
error = vImageConvert_420Yp8_CbCr8ToARGB8888(&srcYp, &srcCbCr, &dest, &infoYpCbCrToARGB, permuteMap, 255, kvImageNoFlags);
//处理dest中的ARGB数据
/*
code...
*/
free(srcYpData);
free(srcCbCrData);
free(aRgbBuffer);