How to dump YUV in Android Native OMXCodec (S3 & Note 3)

Question

i have followed below method to access YUV buffer. It works in few phones. But in S3 and Note 3 I'm getting problem. any reason ? Please help me.

sp<GraphicBuffer> mCurrGraphicBuffer;

void *vaddr;

mCurrGraphicBuffer = mVideoBuffer->graphicBuffer();

mCurrGraphicBuffer->lock(GRALLOC_USAGE_SW_READ_OFTEN, &vaddr);

I tried to google, but nothing helped me.

Answer 1

The implementation of lock to provide a mapped virtual address is dependent on the vendor's internal implementation in gralloc.

One potential cause for your issue could be that the GraphicBuffer may not have been created with usage flags indicating GRALLOC_USAGE_SW_READ_OFTEN.

If possible, please enable this flag in usage flags prior to the creation of GraphicBuffer and retry your experiment, which I feel should be successful.