API说明

CVPixelBufferRef

CVPixelBufferRef是__CVBuffer *的typedef，所以CVPixelBufferRef是一个指针。

CVPixelBufferRetain

CVPixelBufferRetain(pixel_buffer_);

CVPixelBufferRelease

CVPixelBufferRelease(pixel_buffer_);

CVPixelBufferUnlockBaseAddress

CVPixelBufferLockBaseAddress

CMSampleBufferRef?

CMSampleBufferGetImageBuffer?

CVPixelBufferRef pixel_buffer_ = CMSampleBufferGetImageBuffer(sampleBuffer);