Convert NSData to CMSampleBufferRef

Question

Is there any way to create CMSampleBufferRef from NSData? NSData object has also be constructed from CMSampleBufferRef formerly. I need that conversion because I want to save the CMSampleBufferRef frames (as NSData) that are taken from live camera using AVFoundation, then be able to use the CMSampleBufferRef frames (by converting NSData objects to CMSampleBufferRef) to construct a video.

Thanks in advance...

Answer 1

-(AudioBufferList *) getBufferListFromData: (NSData *) data
{
       if (data.length > 0)
       {
            NSUInteger len = [data length];
            //I guess you can use Byte*, void* or Float32*. I am not sure if that makes any difference.
            Byte * byteData = (Byte*) malloc (len);
            memcpy (byteData, [data bytes], len);
            if (byteData)
            {
                 AudioBufferList * theDataBuffer =(AudioBufferList*)malloc(sizeof(AudioBufferList) * 1);
                 theDataBuffer->mNumberBuffers = 1;
                 theDataBuffer->mBuffers[0].mDataByteSize = len;
                 theDataBuffer->mBuffers[0].mNumberChannels = 1;
                 theDataBuffer->mBuffers[0].mData = byteData;
                 // Read the data into an AudioBufferList
                 return theDataBuffer;
             }
        }
        return nil;
}