windows-server-2003/multimedia/directx/dsound/dsdmo/distort.cpp

#include <windows.h>

#include "distortp.h"
#include "debug.h"
#include "clone.h"

STD_CREATE(Distortion)

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortDMO::NDQueryInterface
//
// Subclass can override if it wants to implement more interfaces.
//
STDMETHODIMP CDirectSoundDistortionDMO::NDQueryInterface(THIS_ REFIID riid, LPVOID *ppv)
{
    IMP_DSDMO_QI(riid,ppv);

    if (riid == IID_IPersist)
    {
        return GetInterface((IPersist*)this, ppv);
    }
    else if (riid == IID_IMediaObject)
    {
        return GetInterface((IMediaObject*)this, ppv);
    }
    else if (riid == IID_IDirectSoundFXDistortion)
    {
        return GetInterface((IDirectSoundFXDistortion*)this, ppv);
    }
    else if (riid == IID_ISpecifyPropertyPages)
    {
        return GetInterface((ISpecifyPropertyPages*)this, ppv);
    }
    else if (riid == IID_IMediaParams)
    {
        return GetInterface((IMediaParams*)this, ppv);
    }
    else if (riid == IID_IMediaParamInfo)
    {
        return GetInterface((IMediaParamInfo*)this, ppv);
    }
    else
        return CComBase::NDQueryInterface(riid, ppv);
}

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortionDMO::CDirectSoundDistortionDMO
//
CDirectSoundDistortionDMO::CDirectSoundDistortionDMO( IUnknown *pUnk, HRESULT *phr ) 
  : CComBase( pUnk, phr ),
    m_fDirty(false)
// { EAX: put init data here if any (otherwise use Discontinuity).
// } EAX
{
	m_EaxSamplesPerSec = 44010;
}

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortionDMO::Init()
//
HRESULT CDirectSoundDistortionDMO::Init()
{
    DSFXDistortion distort;

    // Force recalc of all internal parameters
    //
    GetAllParameters(&distort);
    SetAllParameters(&distort);

    return Discontinuity();
}

const MP_CAPS g_capsAll = MP_CAPS_CURVE_JUMP | MP_CAPS_CURVE_LINEAR | MP_CAPS_CURVE_SQUARE | MP_CAPS_CURVE_INVSQUARE | MP_CAPS_CURVE_SINE;
static ParamInfo g_params[] =
{
//  index           type        caps        min,                                        max,                                        neutral,    unit text,  label,                      pwchText
    DFP_Gain,       MPT_FLOAT,  g_capsAll,  DSFXDISTORTION_GAIN_MIN,                    DSFXDISTORTION_GAIN_MAX,                    -18,        L"",        L"Gain",                    L"",
    DFP_Edge,       MPT_FLOAT,  g_capsAll,  DSFXDISTORTION_EDGE_MIN,                    DSFXDISTORTION_EDGE_MAX,                    15,         L"",        L"Edge",                    L"",
    DFP_LpCutoff,   MPT_FLOAT,  g_capsAll,  DSFXDISTORTION_PRELOWPASSCUTOFF_MIN,        DSFXDISTORTION_PRELOWPASSCUTOFF_MAX,        8000,       L"",        L"PreLowpassCutoff",        L"",
    DFP_EqCenter,   MPT_FLOAT,  g_capsAll,  DSFXDISTORTION_POSTEQCENTERFREQUENCY_MIN,   DSFXDISTORTION_POSTEQCENTERFREQUENCY_MAX,   2400,       L"",        L"PostEQCenterFrequency",   L"",
    DFP_EqWidth,    MPT_FLOAT,  g_capsAll,  DSFXDISTORTION_POSTEQBANDWIDTH_MIN,         DSFXDISTORTION_POSTEQBANDWIDTH_MAX,         2400,       L"",        L"PostEQBandwidth",         L"",
};

HRESULT CDirectSoundDistortionDMO::InitOnCreation()
{
    HRESULT hr = InitParams(1, &GUID_TIME_REFERENCE, 0, 0, sizeof(g_params)/sizeof(*g_params), g_params);
    return hr;
}

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortionDMO::~CDirectSoundDistortionDMO
//
CDirectSoundDistortionDMO::~CDirectSoundDistortionDMO() 
{
}

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortionDMO::Clone
//
STDMETHODIMP CDirectSoundDistortionDMO::Clone(IMediaObjectInPlace **pp) 
{
    return StandardDMOClone<CDirectSoundDistortionDMO, DSFXDistortion>(this, pp);
}

//
//	Bump - bump the delay pointers.
//
void CDirectSoundDistortionDMO::Bump(void)
{
// EAX {
// }
}


HRESULT CDirectSoundDistortionDMO::Discontinuity() 
{
// { EAX

	m_delayL1 = m_delayL2 = m_delayR1 = m_delayR2 = 0;
	m_ls0     = m_rs0     = 0.0;


// } EAX
    return S_OK;
}

//////////////////////////////////////////////////////////////////////////////

__forceinline void CDirectSoundDistortionDMO::DoOneSampleMono(int *l)
{
	float	inPortL = (float)*l;
	
	float	outPortL, tempvar;

	// One-pole lowpass filter
	outPortL	= inPortL * m_EaxLpff;
	m_ls0		= outPortL + m_ls0 * m_EaxLpfb;
	////////////////////////////////////////

	////////////////////////////////////////
	// Non-linear gain
#define LOG(x,y)	mylog(x,y)
	outPortL	= (float)LOG(m_ls0 * 0x8000, m_EaxExp_range);

	outPortL 	/= 0x8000;

	////////////////////////////////////////

	////////////////////////////////////////
	// Bandpass
	outPortL	= outPortL * m_EaxInScale;
	tempvar		= outPortL - m_delayL1 * m_EaxK2;
	tempvar		= tempvar - m_delayL2 * m_EaxK1;
	m_delayL1	= m_delayL2 + tempvar * m_EaxK1;
	m_delayL2	= tempvar;
	outPortL	= tempvar;

	////////////////////////////////////////

#ifdef GOOD_CODE_GEN
	*l = Saturate(outPortL);
#else
	int i;

#ifdef i386
	_asm {
		fld outPortL
		fistp i
	}
#else
	i = (int)outPortL;
#endif 
	if (i > 32767)
		i =  32767;
	else if ( i < -32768)
		i = -32768;

	*l = i;
#endif

//	Bump();
}

//////////////////////////////////////////////////////////////////////////////

__forceinline void CDirectSoundDistortionDMO::DoOneSample(int *l, int *r)
{
	float	inPortL = (float)*l;
	float	inPortR = (float)*r;
	
	float	outPortL, outPortR, tempvar;

	// One-pole lowpass filter
	outPortL	= inPortL * m_EaxLpff;
	outPortR	= inPortR * m_EaxLpff;
	m_ls0		= outPortL + m_ls0 * m_EaxLpfb;
	m_rs0		= outPortR + m_rs0 * m_EaxLpfb;
	////////////////////////////////////////

	////////////////////////////////////////
	// Non-linear gain
#define LOG(x,y)	mylog(x,y)
	outPortL	= (float)LOG(m_ls0 * 0x8000, m_EaxExp_range);
	outPortR	= (float)LOG(m_rs0 * 0x8000, m_EaxExp_range);

	outPortL 	/= 0x8000;
	outPortR 	/= 0x8000;

	////////////////////////////////////////

	////////////////////////////////////////
	// Bandpass
	outPortL	= outPortL * m_EaxInScale;
	tempvar		= outPortL - m_delayL1 * m_EaxK2;
	tempvar		= tempvar - m_delayL2 * m_EaxK1;
	m_delayL1	= m_delayL2 + tempvar * m_EaxK1;
	m_delayL2	= tempvar;
	outPortL	= tempvar;

	outPortR	= outPortR * m_EaxInScale;
	tempvar		= outPortR - m_delayR1 * m_EaxK2;
	tempvar		= tempvar - m_delayR2 * m_EaxK1;
	m_delayR1	= m_delayR2 + tempvar * m_EaxK1;
	m_delayR2	= tempvar;
	outPortR	= tempvar;
	////////////////////////////////////////

	*l = Saturate(outPortL);
	*r = Saturate(outPortR);

//	Bump();
}

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortionDMO::FBRProcess
//
HRESULT CDirectSoundDistortionDMO::FBRProcess(DWORD cSamples, BYTE *pIn, BYTE *pOut)
{
// { EAX
#define cb cSamples
#define pin pIn
#define pout pOut

	if (m_cChannels == 1) {
		if (m_b8bit) {
			for (;cb > 0; --cb) {
				int i, j;

				i = *(pin+0)-128;
				i *=256;
//				j  = i;

				DoOneSampleMono(&i);
				
//				i += j;
//				i /= 2;
				
				i /= 256;

				*(pout+0) = (unsigned char)(i + 128);
			
				pin  += sizeof(unsigned char);
				pout += sizeof(unsigned char);
			}
		}
		else if (!m_b8bit) {
			for (;cb > 0; --cb) { // for (;cb > 0; cb -= sizeof(short)) {
               	short int *psi = (short int *)pin;
               	short int *pso = (short int *)pout;
				int i, j;

				i = *psi;
//				j =  i;

				DoOneSampleMono(&i);
				
//				i += j;
//				i /= 2;
				
               	*pso = (short)i;
			
				pin  += sizeof(short);
				pout += sizeof(short);
			}
		}
	}
	else if (m_cChannels == 2) {
		if (m_b8bit) {
			for (;cb > 0; --cb) { // for (;cb > 0; cb -= 2 * sizeof(unsigned char)) {
				int i, j;

				i = *(pin+0)-128;
				j = *(pin+1)-128;

				i *=256; j *=256;

				DoOneSample(&i, &j);
				
				i /= 256; j /= 256;
				
				*(pout+0) = (unsigned char)(i + 128);
				*(pout+1) = (unsigned char)(j + 128);
			
				pin  += 2 * sizeof(unsigned char);
				pout += 2 * sizeof(unsigned char);
			}
		}
		else if (!m_b8bit) {
			for (;cb > 0; --cb) { // for (;cb > 0; cb -= 2 * sizeof(short)) {
               	short int *psi = (short int *)pin;
               	short int *pso = (short int *)pout;
				int i, j;

				i = *(psi+0);
				j = *(psi+1);

				DoOneSample(&i, &j);
				
               	*(pso+0) = (short)i;
               	*(pso+1) = (short)j;
			
				pin  += 2 * sizeof(short);
				pout += 2 * sizeof(short);
			}
		}
	}
// } EAX
    return S_OK;
}

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortionDMO::ProcessInPlace
//
HRESULT CDirectSoundDistortionDMO::ProcessInPlace(ULONG ulQuanta, LPBYTE pcbData, REFERENCE_TIME rtStart, DWORD dwFlags)
{
    // Update parameter values from any curves that may be in effect.
    this->UpdateActiveParams(rtStart, *this);

    return FBRProcess(ulQuanta, pcbData, pcbData);
}

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortionDMO::SetParam
//
// { EAX
// }

HRESULT CDirectSoundDistortionDMO::SetParamInternal(DWORD dwParamIndex, MP_DATA value, bool fSkipPasssingToParamManager)
{
    HRESULT hr = S_OK;
    HRESULT hr2 = S_OK;

	//if (!m_EaxSamplesPerSec) return DMO_E_TYPE_NOT_ACCEPTED;	// NO TYPE!

    switch (dwParamIndex)
    {
// { EAX
	case DFP_Gain : {
		CHECK_PARAM(DSFXDISTORTION_GAIN_MIN, DSFXDISTORTION_GAIN_MAX);

		PUT_EAX_VALUE(Gain, value);

		m_EaxGain = (float)pow(10, m_EaxGain/20);

		INTERPOLATE(InScale, TOFRACTION(m_EaxScale*m_EaxGain));
		break;

	case DFP_Edge:
		CHECK_PARAM(DSFXDISTORTION_EDGE_MIN, DSFXDISTORTION_EDGE_MAX);

		PUT_EAX_VALUE(Edge, value);

		m_EaxEdge = (m_EaxEdge/100 * 29) + 2;

		PUT_EAX_VALUE(Exp_range, (DWORD) m_EaxEdge);

		SetParamInternal(DFP_EqCenter, m_EaxCenter, true);
		SetParamInternal(DFP_EqWidth,  m_EaxBandwidth, true);
		break;

	case DFP_LpCutoff:
		CHECK_PARAM(DSFXDISTORTION_PRELOWPASSCUTOFF_MIN, DSFXDISTORTION_PRELOWPASSCUTOFF_MAX);

		//Clamp at Fs/3;
        if (value > (MP_DATA)(m_EaxSamplesPerSec / 3))
        {
            value = (MP_DATA)(m_EaxSamplesPerSec / 3);
            hr = S_FALSE;
        }

		m_EaxLpfb = (float)sqrt((2*cos(2*PI*value/m_EaxSamplesPerSec)+3)/5);
		m_EaxLpff = (float)sqrt(1-m_EaxLpfb*m_EaxLpfb);
		break;

	case DFP_EqCenter: {
		CHECK_PARAM(DSFXDISTORTION_POSTEQCENTERFREQUENCY_MIN, DSFXDISTORTION_POSTEQCENTERFREQUENCY_MAX);

        //Clamp at Fs/3;
        if (value > (MP_DATA)(m_EaxSamplesPerSec / 3))
        {
            value = (MP_DATA)(m_EaxSamplesPerSec / 3);
            hr = S_FALSE;
        }

        PUT_EAX_VALUE(Center, value);

       

		double _k1, _k2, _omega;

		_omega = 2*PI*m_EaxBandwidth/m_EaxSamplesPerSec;
		_k1 = -cos(2*PI*value/m_EaxSamplesPerSec);
		_k2 = (1 - tan(_omega/2)) / (1 + tan(_omega/2));

		m_EaxScale = (float)(sqrt(1 - _k1*_k1) * sqrt(1 - _k2*_k2));
		m_EaxScale = (float)(m_EaxScale * LogNorm[(int)m_EaxEdge]);

		INTERPOLATE(K1,      TOFRACTION(_k1));
		INTERPOLATE(InScale, TOFRACTION(m_EaxScale*m_EaxGain));
		break;
	}
	case DFP_EqWidth: {
		CHECK_PARAM(DSFXDISTORTION_POSTEQBANDWIDTH_MIN, DSFXDISTORTION_POSTEQBANDWIDTH_MAX);

		//Clamp at Fs/3;
        if (value > (MP_DATA)(m_EaxSamplesPerSec / 3))
        {
            value = (MP_DATA)(m_EaxSamplesPerSec / 3);
            hr = S_FALSE;
        }

        PUT_EAX_VALUE(Bandwidth, value);

		double _k1, _k2, _omega;

		_omega = 2*PI*value/m_EaxSamplesPerSec;
		_k1 = (float)(-cos(2*PI*m_EaxCenter/m_EaxSamplesPerSec));
		_k2 = (float)((1 - tan(_omega/2)) / (1 + tan(_omega/2)));

		m_EaxScale = (float)(sqrt(1 - _k1*_k1) * sqrt(1 - _k2*_k2));
		m_EaxScale = (float)(m_EaxScale * LogNorm[(int)m_EaxEdge]);

		INTERPOLATE(K2,      TOFRACTION(_k2));
		INTERPOLATE(InScale, TOFRACTION(m_EaxScale*m_EaxGain));
		break;
	}
	}
// } EAX
    default:
        return E_FAIL;
    }

    // Let base class set this so it can handle all the rest of the param calls.
    // Skip the base class if fSkipPasssingToParamManager.  This indicates that we're calling the function
    //    internally using valuds that came from the base class -- thus there's no need to tell it values it
    //    already knows.

    hr2 = fSkipPasssingToParamManager ? S_OK : CParamsManager::SetParam(dwParamIndex, value);

    //Preserve the S_FALSE if there is one
    if (FAILED(hr2))
        hr = hr2;

    return hr;
}

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortionDMO::SetAllParameters
//
STDMETHODIMP CDirectSoundDistortionDMO::SetAllParameters(LPCDSFXDistortion pDistort)
{
    HRESULT hr = S_OK;
    HRESULT hr2[5];

    ZeroMemory(hr2,sizeof(hr2));
	
	// Check that the pointer is not NULL
    if (pDistort == NULL)
    {
        Trace(1,"ERROR: pDistort is NULL\n");
        hr = E_POINTER;
    }

    // Set the parameters
    if (SUCCEEDED(hr)) hr = hr2[0] = SetParam(DFP_Gain, pDistort->fGain);
    if (SUCCEEDED(hr)) hr = hr2[1] = SetParam(DFP_Edge, pDistort->fEdge);   
    if (SUCCEEDED(hr)) hr = hr2[2] = SetParam(DFP_LpCutoff, pDistort->fPreLowpassCutoff);
    if (SUCCEEDED(hr)) hr = hr2[3] = SetParam(DFP_EqCenter, pDistort->fPostEQCenterFrequency);
    if (SUCCEEDED(hr)) hr = hr2[4] = SetParam(DFP_EqWidth, pDistort->fPostEQBandwidth);

    m_fDirty = true;

    // if we have any alternate success codes, grab the first one and return it.
    if(SUCCEEDED(hr))
    {
        for (int i = 0;i < 5; i++)
        {
            if (hr2[i] != S_OK)
            {
                hr = hr2[i];
                break;
            }
        }
    }
    
	return hr;
}

//////////////////////////////////////////////////////////////////////////////
//
// CDirectSoundDistortionDMO::GetAllParameters
//
STDMETHODIMP CDirectSoundDistortionDMO::GetAllParameters(LPDSFXDistortion pDistort)
{
    HRESULT hr = S_OK;
	MP_DATA mpd;

	if (pDistort == NULL)
	{
		return E_POINTER;
	}
			
#define GET_PARAM(x,y) \
	if (SUCCEEDED(hr)) { \
		hr = GetParam(x, &mpd);	\
		if (SUCCEEDED(hr)) pDistort->y = mpd; \
	}

    GET_PARAM(DFP_Edge, fEdge);
    GET_PARAM(DFP_Gain, fGain);
    GET_PARAM(DFP_LpCutoff, fPreLowpassCutoff);
    GET_PARAM(DFP_EqCenter, fPostEQCenterFrequency);
    GET_PARAM(DFP_EqWidth, fPostEQBandwidth);

	return hr;
}

// GetClassID
//
// Part of the persistent file support.  We must supply our class id
// which can be saved in a graph file and used on loading a graph with
// this fx in it to instantiate this filter via CoCreateInstance.
//
HRESULT CDirectSoundDistortionDMO::GetClassID(CLSID *pClsid)
{
    if (pClsid==NULL) {
        return E_POINTER;
    }
    *pClsid = GUID_DSFX_STANDARD_DISTORTION;
    return NOERROR;

} // GetClassID