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Re: scaudiocompress questions
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Re: scaudiocompress questions


On 7-jun-07, at 21:09, Brad Ford wrote:

HHello,

I have a few questions about the sample code:

    
Before each call to SCAudioFillBuffer the code does this:

    for (i = 0; i < abl->mNumberBuffers; i++)
    {
      abl->mBuffers[i].mNumberChannels = (abl->mNumberBuffers > 1 ? 1 : asbd.mChannelsPerFrame);
      abl->mBuffers[i].mDataByteSize = bufferSize;
      abl->mBuffers[i].mData = ptr;
      ptr = (UInt8*)ptr + bufferSize;
    }

Can't this be taken out of the compression loop?

Yes, as used in scaudiocompress, this is actually one-time initialization code.  It would, however, be necessary if the bufferSize were changing on every pull (e.g. if you were pulling for different amounts each time), so I left it in as "belt and suspenders" code.

I actually had a bug in my audio handling that went away after I moved this code back into the loop. But I didn't check what was happening.
So I would advise to leave the sample code as it is.

Jan E.
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