81 lines
1.5 KiB
C
81 lines
1.5 KiB
C
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#ifndef NULLSOFT_ALLOCLAYERH
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#define NULLSOFT_ALLOCLAYERH
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#include "WMHandler.h"
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#include "BufferPool.h"
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#include <cassert>
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class AllocLayer : public WMHandler
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{
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public:
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AllocLayer(IWMReader *reader)
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: readerAdvanced(0),
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listenOutput( -1),
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maxSize(0)
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{
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reader->QueryInterface(&readerAdvanced);
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}
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~AllocLayer()
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{
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if (readerAdvanced)
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{
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readerAdvanced->Release();
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readerAdvanced = 0;
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}
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}
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void Listen(long output)
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{
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listenOutput = output;
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if (output != -1)
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{
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readerAdvanced->SetAllocateForOutput(listenOutput, TRUE);
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readerAdvanced->GetMaxOutputSampleSize(listenOutput, &maxSize);
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assert(maxSize>0);
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pool.SetAllocSize(maxSize);
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}
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}
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void Listen(long output, long numBuffers)
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{
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listenOutput = output;
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if (output != -1)
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{
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readerAdvanced->SetAllocateForOutput(listenOutput, TRUE);
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readerAdvanced->GetMaxOutputSampleSize(listenOutput, &maxSize);
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assert(maxSize>0);
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pool.SetAllocSize(maxSize);
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pool.PreAllocate(numBuffers);
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pool.limit=numBuffers;
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}
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}
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void FreeBuffers()
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{
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pool.FreeBuffers();
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}
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BufferPool pool;
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private:
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void AllocateOutput(long outputNum, long bufferSize, INSSBuffer *&buffer)
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{
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if (outputNum == listenOutput)
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{
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assert(maxSize >= bufferSize);
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buffer = pool.GetBuffer(bufferSize);
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}
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else
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WMHandler::AllocateOutput(outputNum, bufferSize, buffer); // let other handlers have a shot at it first.
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}
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// WMHandler
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long listenOutput;
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DWORD maxSize;
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IWMReaderAdvanced *readerAdvanced;
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};
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#endif
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