DJI VideoFrameYUV для преобразования CIImage - PullRequest
Новая
       100

DJI VideoFrameYUV для преобразования CIImage

0 голосов
/ 03 августа 2020

У меня проблема с преобразованием VideoFrameYUV в CIImage. Я пробовал ускоренный метод HW с: 

CVPixelBufferRef pixelBuffer = frame->cv_pixelbuffer_fastupload;
CIImage *ciImage = [CIImage imageWithCVPixelBuffer:pixelBuffer];

, но CIImage всегда NULL.

Я пробовал способ SW: 

CVPixelBufferRef pixelBuffer = NULL;
CVReturn resulst = CVPixelBufferCreate(kCFAllocatorDefault,
                                       frame-> width,
                                       frame -> height,
                                       kCVPixelFormatType_420YpCbCr8Planar,
                                       NULL,
                                       &pixelBuffer);
if (kCVReturnSuccess != CVPixelBufferLockBaseAddress(pixelBuffer, 0) || pixelBuffer == NULL) {
    return;
}

long yPlaneWidth = CVPixelBufferGetWidthOfPlane(pixelBuffer, 0);
long yPlaneHeight = CVPixelBufferGetHeightOfPlane(pixelBuffer,0);
long uPlaneWidth = CVPixelBufferGetWidthOfPlane(pixelBuffer, 1);
long uPlaneHeight = CVPixelBufferGetHeightOfPlane(pixelBuffer, 1);
long vPlaneWidth = CVPixelBufferGetWidthOfPlane(pixelBuffer, 2);
long vPlaneHeight =  CVPixelBufferGetHeightOfPlane(pixelBuffer, 2);
uint8_t* yDestination = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0);
memcpy(yDestination, frame->luma, yPlaneWidth * yPlaneHeight);
uint8_t* uDestination = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 1);
memcpy(uDestination, frame->chromaB, uPlaneWidth * uPlaneHeight);
uint8_t* vDestination = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 2);
memcpy(vDestination, frame->chromaR, vPlaneWidth * vPlaneHeight);
CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);

[self log:[NSString stringWithFormat:@"Frame width: %@", @(frame-> width).stringValue]];

if(pixelBuffer == NULL) {
    [self log:@"PixelBuffer is NULL"];
    return;
}

if(CVPixelBufferGetPlaneCount(pixelBuffer) == 3) {
    [self log:@"y-cr-cb"];
}

if(CVPixelBufferGetPlaneCount(pixelBuffer) == 2) {
    [self log:@"y-cr-cb-bi"];
}

CIImage *ciImage = [CIImage imageWithCVPixelBuffer:pixelBuffer];

if(ciImage != NULL) {
    [self log:@"CIImage exist"];
} else {
    [self log:@"CIImage doesnt exist"];
}

Выход : 

Frame width: 1280
y-cr-cb
CIImage doesnt exist
Frame width: 1280
y-cr-cb
CIImage doesnt exist
....

Что я делаю не так? Спасибо.

...