engines/gig/Synthesizer.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 Christian Schoenebeck                              *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#ifndef __LS_GIG_SYNTHESIZER_H__
#define __LS_GIG_SYNTHESIZER_H__

#include "../../common/global.h"
#include "../../common/RTMath.h"
#include "../common/Resampler.h"
#include "../common/BiquadFilter.h"
#include "Filter.h"
#include "SynthesisParam.h"

#define SYNTHESIS_MODE_SET_INTERPOLATE(iMode,bVal)      if (bVal) iMode |= 0x01; else iMode &= ~0x01   /* (un)set mode bit 0 */
#define SYNTHESIS_MODE_SET_FILTER(iMode,bVal)           if (bVal) iMode |= 0x02; else iMode &= ~0x02   /* (un)set mode bit 1 */
#define SYNTHESIS_MODE_SET_LOOP(iMode,bVal)             if (bVal) iMode |= 0x04; else iMode &= ~0x04   /* (un)set mode bit 2 */
#define SYNTHESIS_MODE_SET_CHANNELS(iMode,bVal)         if (bVal) iMode |= 0x08; else iMode &= ~0x08   /* (un)set mode bit 3 */
#define SYNTHESIS_MODE_SET_IMPLEMENTATION(iMode,bVal)   if (bVal) iMode |= 0x10; else iMode &= ~0x10   /* (un)set mode bit 4 */
#define SYNTHESIS_MODE_SET_PROFILING(iMode,bVal)        if (bVal) iMode |= 0x20; else iMode &= ~0x20   /* (un)set mode bit 5 */

#define SYNTHESIS_MODE_GET_INTERPOLATE(iMode)           iMode & 0x01
#define SYNTHESIS_MODE_GET_FILTER(iMode)                iMode & 0x02
#define SYNTHESIS_MODE_GET_LOOP(iMode)                  iMode & 0x04
#define SYNTHESIS_MODE_GET_CHANNELS(iMode)              iMode & 0x08
#define SYNTHESIS_MODE_GET_IMPLEMENTATION(iMode)        iMode & 0x10

namespace LinuxSampler { namespace gig {

    typedef void SynthesizeFragment_Fn(SynthesisParam* pFinalParam, Loop* pLoop);

    void* GetSynthesisFunction(const int SynthesisMode);
    void RunSynthesisFunction(const int SynthesisMode, SynthesisParam* pFinalParam, Loop* pLoop);

    enum channels_t {
        MONO,
        STEREO
    };

    /** @brief Main Synthesis algorithms for the gig::Engine
     *
     * Implementation of the main synthesis algorithms of the Gigasampler
     * format capable sampler engine. This means resampling / interpolation
     * for pitching the audio signal, looping, filter and amplification.
     */
    template<channels_t CHANNELS, bool DOLOOP, bool USEFILTER, bool INTERPOLATE>
    class Synthesizer : public __RTMath<CPP>, public LinuxSampler::Resampler<INTERPOLATE> {

            // declarations of derived functions (see "Name lookup,
            // templates, and accessing members of base classes" in
            // the gcc manual for an explanation of why this is
            // needed).
            using __RTMath<CPP>::Mul;
            using __RTMath<CPP>::Float;
            //using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleMonoCPP;
            //using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleStereoCPP;
            using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepMonoCPP;
            using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepStereoCPP;

        public:
        //protected:

            static void SynthesizeSubFragment(SynthesisParam* pFinalParam, Loop* pLoop) {
                if (DOLOOP) {
                    const float fLoopEnd   = Float(pLoop->uiEnd);
                    const float fLoopStart = Float(pLoop->uiStart);
                    const float fLoopSize  = Float(pLoop->uiSize);
                    if (pLoop->uiTotalCycles) {
                        // render loop (loop count limited)
                        for (; pFinalParam->uiToGo > 0 && pLoop->uiCyclesLeft; pLoop->uiCyclesLeft -= WrapLoop(fLoopStart, fLoopSize, fLoopEnd, &pFinalParam->dPos)) {
                            const uint uiToGo = Min(pFinalParam->uiToGo, DiffToLoopEnd(fLoopEnd, &pFinalParam->dPos, pFinalParam->fFinalPitch) + 1); //TODO: instead of +1 we could also round up
                            SynthesizeSubSubFragment(pFinalParam, uiToGo);
                        }
                        // render on without loop
                        SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
                    } else { // render loop (endless loop)
                        for (; pFinalParam->uiToGo > 0; WrapLoop(fLoopStart, fLoopSize, fLoopEnd, &pFinalParam->dPos)) {
                            const uint uiToGo = Min(pFinalParam->uiToGo, DiffToLoopEnd(fLoopEnd, &pFinalParam->dPos, pFinalParam->fFinalPitch) + 1); //TODO: instead of +1 we could also round up
                            SynthesizeSubSubFragment(pFinalParam, uiToGo);
                        }
                    }
                } else { // no looping
                    SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
                }
            }

            /**
             * Returns the difference to the sample's loop end.
             */
            inline static int DiffToLoopEnd(const float& LoopEnd, const void* Pos, const float& Pitch) {
                return uint((LoopEnd - *((double *)Pos)) / Pitch);
            }

#if 0
            //TODO: this method is not in use yet, it's intended to be used for pitch=x.0f where we could use integer instead of float as playback position variable
            inline static int WrapLoop(const int& LoopStart, const int& LoopSize, const int& LoopEnd, int& Pos) {
                //TODO: we can easily eliminate the branch here
                if (Pos < LoopEnd) return 0;
                Pos = (Pos - LoopEnd) % LoopSize + LoopStart;
                return 1;
            }
#endif

            /**
             * This method handles looping of the RAM playback part of the
             * sample, thus repositioning the playback position once the
             * loop limit was reached. Note: looping of the disk streaming
             * part is handled by libgig (ReadAndLoop() method which will
             * be called by the DiskThread).
             */
            inline static int WrapLoop(const float& LoopStart, const float& LoopSize, const float& LoopEnd, void* vPos) {
                double * Pos = (double *)vPos;
                if (*Pos < LoopEnd) return 0;
                *Pos = fmod(*Pos - LoopEnd, LoopSize) + LoopStart;
                return 1;
            }

            static void SynthesizeSubSubFragment(SynthesisParam* pFinalParam, uint uiToGo) {
                switch (CHANNELS) {
                    case MONO: {
                        if (INTERPOLATE) {
                            if (USEFILTER) {
                                Filter filterL = pFinalParam->filterLeft;
                                sample_t* pSrc = pFinalParam->pSrc;
                                double dPos    = pFinalParam->dPos;
                                float fPitch   = pFinalParam->fFinalPitch;
                                float* pOutL   = pFinalParam->pOutLeft;
                                float* pOutR   = pFinalParam->pOutRight;
                                float fVolumeL = pFinalParam->fFinalVolumeLeft;
                                float fVolumeR = pFinalParam->fFinalVolumeRight;
                                float samplePoint;
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
                                    samplePoint = filterL.Apply(samplePoint);
                                    pOutL[i] += samplePoint * fVolumeL;
                                    pOutR[i] += samplePoint * fVolumeR;
                                }
                                pFinalParam->dPos = dPos;
                            } else { // no filter needed
                                sample_t* pSrc = pFinalParam->pSrc;
                                double dPos    = pFinalParam->dPos;
                                float fPitch   = pFinalParam->fFinalPitch;
                                float* pOutL   = pFinalParam->pOutLeft;
                                float* pOutR   = pFinalParam->pOutRight;
                                float fVolumeL = pFinalParam->fFinalVolumeLeft;
                                float fVolumeR = pFinalParam->fFinalVolumeRight;
                                float samplePoint;
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
                                    pOutL[i] += samplePoint * fVolumeL;
                                    pOutR[i] += samplePoint * fVolumeR;
                                }
                                pFinalParam->dPos = dPos;
                            }
                        } else { // no interpolation
                            if (USEFILTER) {
                                Filter filterL = pFinalParam->filterLeft;
                                sample_t* pSrc  = pFinalParam->pSrc;
                                float* pOutL   = pFinalParam->pOutLeft;
                                float* pOutR   = pFinalParam->pOutRight;
                                float fVolumeL = pFinalParam->fFinalVolumeLeft;
                                float fVolumeR = pFinalParam->fFinalVolumeRight;
                                int pos_offset = (int) pFinalParam->dPos;
                                float samplePoint;
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = pSrc[i + pos_offset];
                                    samplePoint = filterL.Apply(samplePoint);
                                    pOutL[i] += samplePoint * fVolumeL;
                                    pOutR[i] += samplePoint * fVolumeR;
                                }
                                pFinalParam->dPos += uiToGo;
                            } else { // no filter needed
                                sample_t* pSrc  = pFinalParam->pSrc;
                                float* pOutL   = pFinalParam->pOutLeft;
                                float* pOutR   = pFinalParam->pOutRight;
                                float fVolumeL = pFinalParam->fFinalVolumeLeft;
                                float fVolumeR = pFinalParam->fFinalVolumeRight;
                                int pos_offset = (int) pFinalParam->dPos;
                                float samplePoint;
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = pSrc[i + pos_offset];
                                    pOutL[i] += samplePoint * fVolumeL;
                                    pOutR[i] += samplePoint * fVolumeR;
                                }
                                pFinalParam->dPos += uiToGo;
                            }
                        }
                        break;
                    }
                    case STEREO: {
                        if (INTERPOLATE) {
                            if (USEFILTER) {
                                Filter filterL = pFinalParam->filterLeft;
                                Filter filterR = pFinalParam->filterRight;
                                sample_t* pSrc = pFinalParam->pSrc;
                                double dPos    = pFinalParam->dPos;
                                float fPitch   = pFinalParam->fFinalPitch;
                                float* pOutL   = pFinalParam->pOutLeft;
                                float* pOutR   = pFinalParam->pOutRight;
                                float fVolumeL = pFinalParam->fFinalVolumeLeft;
                                float fVolumeR = pFinalParam->fFinalVolumeRight;
                                stereo_sample_t samplePoint;
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
                                    samplePoint.left  = filterL.Apply(samplePoint.left);
                                    samplePoint.right = filterR.Apply(samplePoint.right);
                                    pOutL[i] += samplePoint.left  * fVolumeL;
                                    pOutR[i] += samplePoint.right * fVolumeR;
                                }
                                pFinalParam->dPos = dPos;
                            } else { // no filter needed
                                sample_t* pSrc = pFinalParam->pSrc;
                                double dPos    = pFinalParam->dPos;
                                float fPitch   = pFinalParam->fFinalPitch;
                                float* pOutL   = pFinalParam->pOutLeft;
                                float* pOutR   = pFinalParam->pOutRight;
                                float fVolumeL = pFinalParam->fFinalVolumeLeft;
                                float fVolumeR = pFinalParam->fFinalVolumeRight;
                                stereo_sample_t samplePoint;
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
                                    pOutL[i] += samplePoint.left  * fVolumeL;
                                    pOutR[i] += samplePoint.right * fVolumeR;
                                }
                                pFinalParam->dPos = dPos;
                            }
                        } else { // no interpolation
                            if (USEFILTER) {
                                Filter filterL = pFinalParam->filterLeft;
                                Filter filterR = pFinalParam->filterRight;
                                sample_t* pSrc  = pFinalParam->pSrc;
                                float* pOutL   = pFinalParam->pOutLeft;
                                float* pOutR   = pFinalParam->pOutRight;
                                float fVolumeL = pFinalParam->fFinalVolumeLeft;
                                float fVolumeR = pFinalParam->fFinalVolumeRight;
                                int pos_offset = ((int) pFinalParam->dPos) << 1;
                                stereo_sample_t samplePoint;
                                for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
                                    samplePoint.left  = pSrc[ii + pos_offset];
                                    samplePoint.right = pSrc[ii + pos_offset + 1];
                                    samplePoint.left  = filterL.Apply(samplePoint.left);
                                    samplePoint.right = filterR.Apply(samplePoint.right);
                                    pOutL[i] += samplePoint.left  * fVolumeL;
                                    pOutR[i] += samplePoint.right * fVolumeR;
                                }
                                pFinalParam->dPos += uiToGo;
                            } else { // no filter needed
                                sample_t* pSrc  = pFinalParam->pSrc;
                                float* pOutL   = pFinalParam->pOutLeft;
                                float* pOutR   = pFinalParam->pOutRight;
                                float fVolumeL = pFinalParam->fFinalVolumeLeft;
                                float fVolumeR = pFinalParam->fFinalVolumeRight;
                                int pos_offset = ((int) pFinalParam->dPos) << 1;
                                stereo_sample_t samplePoint;
                                for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
                                    samplePoint.left  = pSrc[ii + pos_offset];
                                    samplePoint.right = pSrc[ii + pos_offset + 1];
                                    pOutL[i] += samplePoint.left  * fVolumeL;
                                    pOutR[i] += samplePoint.right * fVolumeR;
                                }
                                pFinalParam->dPos += uiToGo;
                            }
                        }
                        break;
                    }
                }
                pFinalParam->pOutRight += uiToGo;
                pFinalParam->pOutLeft  += uiToGo;
                pFinalParam->uiToGo    -= uiToGo;
            }
    };

}} // namespace LinuxSampler::gig

#endif // __LS_GIG_SYNTHESIZER_H__
1	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	* Copyright (C) 2005 Christian Schoenebeck *
7	* *
8	* This program is free software; you can redistribute it and/or modify *
9	* it under the terms of the GNU General Public License as published by *
10	* the Free Software Foundation; either version 2 of the License, or *
11	* (at your option) any later version. *
12	* *
13	* This program is distributed in the hope that it will be useful, *
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16	* GNU General Public License for more details. *
17	* *
18	* You should have received a copy of the GNU General Public License *
19	* along with this program; if not, write to the Free Software *
20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21	* MA 02111-1307 USA *
22	***************************************************************************/
23
24	#ifndef __LS_GIG_SYNTHESIZER_H__
25	#define __LS_GIG_SYNTHESIZER_H__
26
27	#include "../../common/global.h"
28	#include "../../common/RTMath.h"
29	#include "../common/Resampler.h"
30	#include "../common/BiquadFilter.h"
31	#include "Filter.h"
32	#include "SynthesisParam.h"
33
34	#define SYNTHESIS_MODE_SET_INTERPOLATE(iMode,bVal) if (bVal) iMode \|= 0x01; else iMode &= ~0x01 /* (un)set mode bit 0 */
35	#define SYNTHESIS_MODE_SET_FILTER(iMode,bVal) if (bVal) iMode \|= 0x02; else iMode &= ~0x02 /* (un)set mode bit 1 */
36	#define SYNTHESIS_MODE_SET_LOOP(iMode,bVal) if (bVal) iMode \|= 0x04; else iMode &= ~0x04 /* (un)set mode bit 2 */
37	#define SYNTHESIS_MODE_SET_CHANNELS(iMode,bVal) if (bVal) iMode \|= 0x08; else iMode &= ~0x08 /* (un)set mode bit 3 */
38	#define SYNTHESIS_MODE_SET_IMPLEMENTATION(iMode,bVal) if (bVal) iMode \|= 0x10; else iMode &= ~0x10 /* (un)set mode bit 4 */
39	#define SYNTHESIS_MODE_SET_PROFILING(iMode,bVal) if (bVal) iMode \|= 0x20; else iMode &= ~0x20 /* (un)set mode bit 5 */
40
41	#define SYNTHESIS_MODE_GET_INTERPOLATE(iMode) iMode & 0x01
42	#define SYNTHESIS_MODE_GET_FILTER(iMode) iMode & 0x02
43	#define SYNTHESIS_MODE_GET_LOOP(iMode) iMode & 0x04
44	#define SYNTHESIS_MODE_GET_CHANNELS(iMode) iMode & 0x08
45	#define SYNTHESIS_MODE_GET_IMPLEMENTATION(iMode) iMode & 0x10
46
47	namespace LinuxSampler { namespace gig {
48
49	typedef void SynthesizeFragment_Fn(SynthesisParam* pFinalParam, Loop* pLoop);
50
51	void* GetSynthesisFunction(const int SynthesisMode);
52	void RunSynthesisFunction(const int SynthesisMode, SynthesisParam* pFinalParam, Loop* pLoop);
53
54	enum channels_t {
55	MONO,
56	STEREO
57	};
58
59	/** @brief Main Synthesis algorithms for the gig::Engine
60	*
61	* Implementation of the main synthesis algorithms of the Gigasampler
62	* format capable sampler engine. This means resampling / interpolation
63	* for pitching the audio signal, looping, filter and amplification.
64	*/
65	template<channels_t CHANNELS, bool DOLOOP, bool USEFILTER, bool INTERPOLATE>
66	class Synthesizer : public __RTMath<CPP>, public LinuxSampler::Resampler<INTERPOLATE> {
67
68	// declarations of derived functions (see "Name lookup,
69	// templates, and accessing members of base classes" in
70	// the gcc manual for an explanation of why this is
71	// needed).
72	using __RTMath<CPP>::Mul;
73	using __RTMath<CPP>::Float;
74	//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleMonoCPP;
75	//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleStereoCPP;
76	using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepMonoCPP;
77	using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepStereoCPP;
78
79	public:
80	//protected:
81
82	static void SynthesizeSubFragment(SynthesisParam* pFinalParam, Loop* pLoop) {
83	if (DOLOOP) {
84	const float fLoopEnd = Float(pLoop->uiEnd);
85	const float fLoopStart = Float(pLoop->uiStart);
86	const float fLoopSize = Float(pLoop->uiSize);
87	if (pLoop->uiTotalCycles) {
88	// render loop (loop count limited)
89	for (; pFinalParam->uiToGo > 0 && pLoop->uiCyclesLeft; pLoop->uiCyclesLeft -= WrapLoop(fLoopStart, fLoopSize, fLoopEnd, &pFinalParam->dPos)) {
90	const uint uiToGo = Min(pFinalParam->uiToGo, DiffToLoopEnd(fLoopEnd, &pFinalParam->dPos, pFinalParam->fFinalPitch) + 1); //TODO: instead of +1 we could also round up
91	SynthesizeSubSubFragment(pFinalParam, uiToGo);
92	}
93	// render on without loop
94	SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
95	} else { // render loop (endless loop)
96	for (; pFinalParam->uiToGo > 0; WrapLoop(fLoopStart, fLoopSize, fLoopEnd, &pFinalParam->dPos)) {
97	const uint uiToGo = Min(pFinalParam->uiToGo, DiffToLoopEnd(fLoopEnd, &pFinalParam->dPos, pFinalParam->fFinalPitch) + 1); //TODO: instead of +1 we could also round up
98	SynthesizeSubSubFragment(pFinalParam, uiToGo);
99	}
100	}
101	} else { // no looping
102	SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
103	}
104	}
105
106	/**
107	* Returns the difference to the sample's loop end.
108	*/
109	inline static int DiffToLoopEnd(const float& LoopEnd, const void* Pos, const float& Pitch) {
110	return uint((LoopEnd - ((double )Pos)) / Pitch);
111	}
112
113	#if 0
114	//TODO: this method is not in use yet, it's intended to be used for pitch=x.0f where we could use integer instead of float as playback position variable
115	inline static int WrapLoop(const int& LoopStart, const int& LoopSize, const int& LoopEnd, int& Pos) {
116	//TODO: we can easily eliminate the branch here
117	if (Pos < LoopEnd) return 0;
118	Pos = (Pos - LoopEnd) % LoopSize + LoopStart;
119	return 1;
120	}
121	#endif
122
123	/**
124	* This method handles looping of the RAM playback part of the
125	* sample, thus repositioning the playback position once the
126	* loop limit was reached. Note: looping of the disk streaming
127	* part is handled by libgig (ReadAndLoop() method which will
128	* be called by the DiskThread).
129	*/
130	inline static int WrapLoop(const float& LoopStart, const float& LoopSize, const float& LoopEnd, void* vPos) {
131	double * Pos = (double *)vPos;
132	if (*Pos < LoopEnd) return 0;
133	Pos = fmod(Pos - LoopEnd, LoopSize) + LoopStart;
134	return 1;
135	}
136
137	static void SynthesizeSubSubFragment(SynthesisParam* pFinalParam, uint uiToGo) {
138	switch (CHANNELS) {
139	case MONO: {
140	if (INTERPOLATE) {
141	if (USEFILTER) {
142	Filter filterL = pFinalParam->filterLeft;
143	sample_t* pSrc = pFinalParam->pSrc;
144	double dPos = pFinalParam->dPos;
145	float fPitch = pFinalParam->fFinalPitch;
146	float* pOutL = pFinalParam->pOutLeft;
147	float* pOutR = pFinalParam->pOutRight;
148	float fVolumeL = pFinalParam->fFinalVolumeLeft;
149	float fVolumeR = pFinalParam->fFinalVolumeRight;
150	float samplePoint;
151	for (int i = 0; i < uiToGo; ++i) {
152	samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
153	samplePoint = filterL.Apply(samplePoint);
154	pOutL[i] += samplePoint * fVolumeL;
155	pOutR[i] += samplePoint * fVolumeR;
156	}
157	pFinalParam->dPos = dPos;
158	} else { // no filter needed
159	sample_t* pSrc = pFinalParam->pSrc;
160	double dPos = pFinalParam->dPos;
161	float fPitch = pFinalParam->fFinalPitch;
162	float* pOutL = pFinalParam->pOutLeft;
163	float* pOutR = pFinalParam->pOutRight;
164	float fVolumeL = pFinalParam->fFinalVolumeLeft;
165	float fVolumeR = pFinalParam->fFinalVolumeRight;
166	float samplePoint;
167	for (int i = 0; i < uiToGo; ++i) {
168	samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
169	pOutL[i] += samplePoint * fVolumeL;
170	pOutR[i] += samplePoint * fVolumeR;
171	}
172	pFinalParam->dPos = dPos;
173	}
174	} else { // no interpolation
175	if (USEFILTER) {
176	Filter filterL = pFinalParam->filterLeft;
177	sample_t* pSrc = pFinalParam->pSrc;
178	float* pOutL = pFinalParam->pOutLeft;
179	float* pOutR = pFinalParam->pOutRight;
180	float fVolumeL = pFinalParam->fFinalVolumeLeft;
181	float fVolumeR = pFinalParam->fFinalVolumeRight;
182	int pos_offset = (int) pFinalParam->dPos;
183	float samplePoint;
184	for (int i = 0; i < uiToGo; ++i) {
185	samplePoint = pSrc[i + pos_offset];
186	samplePoint = filterL.Apply(samplePoint);
187	pOutL[i] += samplePoint * fVolumeL;
188	pOutR[i] += samplePoint * fVolumeR;
189	}
190	pFinalParam->dPos += uiToGo;
191	} else { // no filter needed
192	sample_t* pSrc = pFinalParam->pSrc;
193	float* pOutL = pFinalParam->pOutLeft;
194	float* pOutR = pFinalParam->pOutRight;
195	float fVolumeL = pFinalParam->fFinalVolumeLeft;
196	float fVolumeR = pFinalParam->fFinalVolumeRight;
197	int pos_offset = (int) pFinalParam->dPos;
198	float samplePoint;
199	for (int i = 0; i < uiToGo; ++i) {
200	samplePoint = pSrc[i + pos_offset];
201	pOutL[i] += samplePoint * fVolumeL;
202	pOutR[i] += samplePoint * fVolumeR;
203	}
204	pFinalParam->dPos += uiToGo;
205	}
206	}
207	break;
208	}
209	case STEREO: {
210	if (INTERPOLATE) {
211	if (USEFILTER) {
212	Filter filterL = pFinalParam->filterLeft;
213	Filter filterR = pFinalParam->filterRight;
214	sample_t* pSrc = pFinalParam->pSrc;
215	double dPos = pFinalParam->dPos;
216	float fPitch = pFinalParam->fFinalPitch;
217	float* pOutL = pFinalParam->pOutLeft;
218	float* pOutR = pFinalParam->pOutRight;
219	float fVolumeL = pFinalParam->fFinalVolumeLeft;
220	float fVolumeR = pFinalParam->fFinalVolumeRight;
221	stereo_sample_t samplePoint;
222	for (int i = 0; i < uiToGo; ++i) {
223	samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
224	samplePoint.left = filterL.Apply(samplePoint.left);
225	samplePoint.right = filterR.Apply(samplePoint.right);
226	pOutL[i] += samplePoint.left * fVolumeL;
227	pOutR[i] += samplePoint.right * fVolumeR;
228	}
229	pFinalParam->dPos = dPos;
230	} else { // no filter needed
231	sample_t* pSrc = pFinalParam->pSrc;
232	double dPos = pFinalParam->dPos;
233	float fPitch = pFinalParam->fFinalPitch;
234	float* pOutL = pFinalParam->pOutLeft;
235	float* pOutR = pFinalParam->pOutRight;
236	float fVolumeL = pFinalParam->fFinalVolumeLeft;
237	float fVolumeR = pFinalParam->fFinalVolumeRight;
238	stereo_sample_t samplePoint;
239	for (int i = 0; i < uiToGo; ++i) {
240	samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
241	pOutL[i] += samplePoint.left * fVolumeL;
242	pOutR[i] += samplePoint.right * fVolumeR;
243	}
244	pFinalParam->dPos = dPos;
245	}
246	} else { // no interpolation
247	if (USEFILTER) {
248	Filter filterL = pFinalParam->filterLeft;
249	Filter filterR = pFinalParam->filterRight;
250	sample_t* pSrc = pFinalParam->pSrc;
251	float* pOutL = pFinalParam->pOutLeft;
252	float* pOutR = pFinalParam->pOutRight;
253	float fVolumeL = pFinalParam->fFinalVolumeLeft;
254	float fVolumeR = pFinalParam->fFinalVolumeRight;
255	int pos_offset = ((int) pFinalParam->dPos) << 1;
256	stereo_sample_t samplePoint;
257	for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
258	samplePoint.left = pSrc[ii + pos_offset];
259	samplePoint.right = pSrc[ii + pos_offset + 1];
260	samplePoint.left = filterL.Apply(samplePoint.left);
261	samplePoint.right = filterR.Apply(samplePoint.right);
262	pOutL[i] += samplePoint.left * fVolumeL;
263	pOutR[i] += samplePoint.right * fVolumeR;
264	}
265	pFinalParam->dPos += uiToGo;
266	} else { // no filter needed
267	sample_t* pSrc = pFinalParam->pSrc;
268	float* pOutL = pFinalParam->pOutLeft;
269	float* pOutR = pFinalParam->pOutRight;
270	float fVolumeL = pFinalParam->fFinalVolumeLeft;
271	float fVolumeR = pFinalParam->fFinalVolumeRight;
272	int pos_offset = ((int) pFinalParam->dPos) << 1;
273	stereo_sample_t samplePoint;
274	for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
275	samplePoint.left = pSrc[ii + pos_offset];
276	samplePoint.right = pSrc[ii + pos_offset + 1];
277	pOutL[i] += samplePoint.left * fVolumeL;
278	pOutR[i] += samplePoint.right * fVolumeR;
279	}
280	pFinalParam->dPos += uiToGo;
281	}
282	}
283	break;
284	}
285	}
286	pFinalParam->pOutRight += uiToGo;
287	pFinalParam->pOutLeft += uiToGo;
288	pFinalParam->uiToGo -= uiToGo;
289	}
290	};
291
292	}} // namespace LinuxSampler::gig
293
294	#endif // __LS_GIG_SYNTHESIZER_H__