取出YUV

-(int) getImageData:(const CVImageBufferRef&) imageBuffer senddata:(unsigned char)data
{
int w,h,linesizey,linesizeuv;
unsigned char srcy=NULL;
unsigned char* srcu=NULL;
unsigned char* srcv=NULL;

CVPixelBufferLockBaseAddress(imageBuffer, 0);
int count=CVPixelBufferGetPlaneCount(imageBuffer);
//printf("CVPixelBufferGetPlaneCount=%d\n",count);

if (CVPixelBufferIsPlanar(imageBuffer)) {
    w = CVPixelBufferGetWidth(imageBuffer);
    h = CVPixelBufferGetHeight(imageBuffer);
    
    // printf("w: %d,h: %d.\n",w,h);
    
    linesizey = CVPixelBufferGetBytesPerRowOfPlane(imageBuffer, 0);
    linesizeuv = CVPixelBufferGetBytesPerRowOfPlane(imageBuffer, 1);
    // printf("CVPixelBufferGetBytesPerRowOfPlane is ok.\n");
    srcy = (unsigned char*) CVPixelBufferGetBaseAddressOfPlane(imageBuffer, 0);
    srcu = (unsigned char*) CVPixelBufferGetBaseAddressOfPlane(imageBuffer, 1);
    srcv = (unsigned char*) CVPixelBufferGetBaseAddressOfPlane(imageBuffer, 2);
    
    memcpy(data,srcy,720*1280);
    memcpy(data+720*1280,srcu,720*1280/4);
    memcpy(data+720*1280*5/4,srcv,720*1280/4);
    
    // printf("CVPixelBufferGetBaseAddressOfPlane is ok.\n");
}
else
{
    printf("CVPixelBufferIsPlanar error\n");
    return -1;
}
return 0;

}

取出RGB

(void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
fromConnection:(AVCaptureConnection *)connection
{

CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
CVPixelBufferLockBaseAddress(imageBuffer,0);

size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
size_t width = CVPixelBufferGetWidth(imageBuffer);
size_t height = CVPixelBufferGetHeight(imageBuffer);
uint8_t src_buff = (uint8_t)CVPixelBufferGetBaseAddress(imageBuffer);

CVPixelBufferUnlockBaseAddress(imageBuffer, 0);
RGBPixel *pixelData = (RGBPixel *)src_buff;

int len = bytesPerRow * height;
for(int i=0; i<len; i+=4){
```
  RGBPixel pixel = pixelData[i/4];
  
  int a = 0;
  int r = pixel.red;
  int g = pixel.green;
  int b = pixel.blue;

  NSLog(@"first values = r:%d g:%d b:%d", r, g, b);
  
  a = src_buff[i+3];
  r = src_buff[i+2];
  g = src_buff[i+1];
  b = src_buff[i];

  NSLog(@"second values = r:%d g:%d b:%d", r, g, b);
```
}