122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
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#ifndef _DXI_H_
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#define _DXI_H_
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#if _MSC_VER > 1000
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#pragma once
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#endif // _MSC_VER > 1000
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#include <DeferZeroFill.h>
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// DirectX automation helper
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#include "MediaParams.h"
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////////////////////////////////////////////////////////////////////////////////
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struct AudioBuffer
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{
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long cSamp; // number of samples in the buffer
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long lOffset; // offset into the data to process
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IMediaSample* pms; // the raw IMediaSample for this buffer
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AudioBuffer() : cSamp(0), lOffset(0), pms(NULL) {}
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//----------------------------------------------------------------------------
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// Get a pointer to the audio samples, zero-filling if necesssary
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float* GetPointer()
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{
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// Get the raw-pointer
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BYTE* pb = NULL;
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pms->GetPointer( &pb );
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// We cannot defer the zero fill any longer!
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if (bZero)
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{
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IDeferZeroFill* pdzf;
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if (SUCCEEDED( pms->QueryInterface( IID_IDeferZeroFill, (void**)&pdzf ) ))
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{
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// IDeferZeroFill will have taken care of the zero-fill for us, by
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// virtue of our calling IMediaSample::GetPointer. Nothing more to do.
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pdzf->Release();
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}
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else
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{
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// No IDeferZeroFill is available. We must zero-fill the hard way.
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memset( pb, 0, cSamp * sizeof(float) );
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}
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bZero = FALSE;
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}
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return reinterpret_cast<float*>( pb + lOffset );
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}
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//----------------------------------------------------------------------------
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// Allow buffers to be tagged as being all zeroes, without actually filling
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// any data until someone asks for the buffer pointer
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BOOL GetZerofill() const { return bZero; }
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void SetZerofill( BOOL bZerofill )
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{
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bZero = bZerofill;
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IDeferZeroFill* pdzf;
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if (SUCCEEDED( pms->QueryInterface( IID_IDeferZeroFill, (void**)&pdzf ) ))
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{
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pdzf->put_NeedsZerofill( bZero );
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pdzf->Release();
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}
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}
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private:
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BOOL bZero;
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};
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////////////////////////////////////////////////////////////////////////////////
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class CDXi : public CCritSec
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{
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public:
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virtual HRESULT Initialize() = 0;
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virtual HRESULT IsValidInputFormat( const WAVEFORMATEX* pwfx ) const = 0;
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virtual HRESULT IsValidOutputFormat( const WAVEFORMATEX* pwfx ) const = 0;
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virtual HRESULT IsValidTransform( const WAVEFORMATEX* pwfxIn, const WAVEFORMATEX* pwfxOut ) const = 0;
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virtual HRESULT SuggestOutputFormat( WAVEFORMATEX* pwfx ) const = 0;
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virtual const WAVEFORMATEX* GetInputFormat() const { return &m_wfxIn; }
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virtual const WAVEFORMATEX* GetOutputFormat() const { return &m_wfxOut; }
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virtual HRESULT Process( LONGLONG llSampAudioTimestamp,
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AudioBuffer* pbufIn,
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AudioBuffer* pbufOut ) = 0;
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virtual HRESULT AllocateResources() = 0;
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virtual HRESULT FreeResources() = 0;
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virtual int PersistGetSize() const = 0;
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virtual HRESULT PersistLoad( IStream* pStream ) = 0;
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virtual HRESULT PersistSave( IStream* pStream ) = 0;
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protected:
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WAVEFORMATEX m_wfxIn;
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WAVEFORMATEX m_wfxOut;
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CMediaParams* m_pMediaParams;
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float GetParamValue( DWORD dwParam ) const
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{
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return m_pMediaParams->GetParamEnvelope( dwParam ).GetCurrentValue();
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}
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HRESULT GetParamDeltas( DWORD dwParam, double* pdDelta1, double* pdDelta2 ) const
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{
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return m_pMediaParams->GetParamEnvelope( dwParam ).GetCurrentDeltas( pdDelta1, pdDelta2 );
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}
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};
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////////////////////////////////////////////////////////////////////////////////
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#endif //_DXI_H_
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