147 lines
4 KiB
C
147 lines
4 KiB
C
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//
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//
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//
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#ifndef _Echop_
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#define _Echop_
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#include "dsdmobse.h"
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#include "dmocom.h"
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#include "dsdmo.h"
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#include "PropertyHelp.h"
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#include "param.h"
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#define cALLPASS ((float).61803398875) // 1-x^2=x.
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#define RVB_LP_COEF ((float).1)
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#define MAXALLPASS cALLPASS
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class CDirectSoundEchoDMO :
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public CDirectSoundDMO,
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public CParamsManager,
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public ISpecifyPropertyPages,
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public IDirectSoundFXEcho,
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public CParamsManager::UpdateCallback,
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public CComBase
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{
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public:
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CDirectSoundEchoDMO( IUnknown *pUnk, HRESULT *phr );
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~CDirectSoundEchoDMO();
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DECLARE_IUNKNOWN;
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STDMETHODIMP NDQueryInterface(REFIID riid, void **ppv);
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static CComBase* WINAPI CreateInstance(IUnknown *pUnk, HRESULT *phr);
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// InitOnCreation is called by the class factory to give the object a chance to initialize
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// immediately after it is created. This is used to prepare the object's parameter information.
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HRESULT InitOnCreation();
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// Note that an Init function also exists in the CPCMDMO base class and it can be overridden
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// to provide initialization for the effect's actual audio processing.
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STDMETHOD(Clone) (THIS_ IMediaObjectInPlace **);
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HRESULT Init();
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/* IFilter */
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STDMETHOD(SetAllParameters) (THIS_ LPCDSFXEcho);
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STDMETHOD(GetAllParameters) (THIS_ LPDSFXEcho);
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// ISpecifyPropertyPages
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STDMETHOD(GetPages)(CAUUID * pPages) { return PropertyHelp::GetPages(CLSID_DirectSoundPropEcho, pPages); }
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// IPersist methods
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virtual HRESULT STDMETHODCALLTYPE GetClassID( CLSID *pClassID );
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// IPersistStream
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STDMETHOD(IsDirty)(void) { return m_fDirty ? S_OK : S_FALSE; }
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STDMETHOD(Load)(IStream *pStm) { return PropertyHelp::Load(this, DSFXEcho(), pStm); }
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STDMETHOD(Save)(IStream *pStm, BOOL fClearDirty) { return PropertyHelp::Save(this, DSFXEcho(), pStm, fClearDirty); }
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STDMETHOD(GetSizeMax)(ULARGE_INTEGER *pcbSize) { if (!pcbSize) return E_POINTER; pcbSize->QuadPart = sizeof(DSFXEcho); return S_OK; }
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// SetParam handling
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STDMETHODIMP SetParam(DWORD dwParamIndex,MP_DATA value) { return SetParamInternal(dwParamIndex, value, false); }
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HRESULT SetParamUpdate(DWORD dwParamIndex, MP_DATA value) { return SetParamInternal(dwParamIndex, value, true); }
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HRESULT SetParamInternal(DWORD dwParamIndex, MP_DATA value, bool fSkipPasssingToParamManager);
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// Overrides
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//
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HRESULT FBRProcess(DWORD cQuanta, BYTE *pIn, BYTE *pOut);
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HRESULT ProcessInPlace(ULONG ulQuanta, LPBYTE pcbData, REFERENCE_TIME rtStart, DWORD dwFlags);
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HRESULT Discontinuity();
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bool m_fDirty;
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protected:
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HRESULT CheckInputType(const DMO_MEDIA_TYPE *pmt) {
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HRESULT hr = CPCMDMO::CheckInputType(pmt);
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if (FAILED(hr)) return hr;
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WAVEFORMATEX *pWave = (WAVEFORMATEX*)pmt->pbFormat;
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if (pWave->wFormatTag != WAVE_FORMAT_PCM ||
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(pWave->wBitsPerSample != 8 && pWave->wBitsPerSample != 16) ||
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(pWave->nChannels != 1 && pWave->nChannels != 2)) {
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return DMO_E_TYPE_NOT_ACCEPTED;
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}
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return S_OK;
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}
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private:
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// { EAX
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__forceinline void DoOneSample(int *l, int *r);
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// Declare internal variables.
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#define DECLARE_EAX_VARS(type, var) \
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type m_Eax ## var;
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DECLARE_EAX_VARS(long, DelayLRead);
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DECLARE_EAX_VARS(long, DelayRRead);
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#define m_EaxSamplesPerSec m_ulSamplingRate
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__forceinline int Saturate(float f) {
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int i;
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#ifdef DONTUSEi386
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_asm {
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fld f
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fistp i
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}
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#else
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i = (int)f;
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#endif
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if (i > 32767)
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i = 32767;
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else if ( i < -32768)
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i = -32768;
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return(i);
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}
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float m_StateL, m_StateR;
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__forceinline float Interpolate(float a, float b, float percent)
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{
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percent = a + (b - a) * percent;
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return(percent);
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}
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DECLARE_EAX_VARS(float, Lpfb);
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DECLARE_EAX_VARS(float, Lpff);
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DECLARE_EAX_VARS(float, Wetlevel);
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DECLARE_EAX_VARS(long, Pan);
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void Bump(void);
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DelayBuffer2<float, 2000, 16> m_DelayL;
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DelayBuffer2<float, 2000, 16> m_DelayR;
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// } EAX
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};
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EXT_STD_CREATE(Echo);
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#endif//
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