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 "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 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) {
                float fVolumeL = pFinalParam->fFinalVolumeLeft;
                float fVolumeR = pFinalParam->fFinalVolumeRight;
                sample_t* pSrc = pFinalParam->pSrc;
                float* pOutL   = pFinalParam->pOutLeft;
                float* pOutR   = pFinalParam->pOutRight;
#ifdef CONFIG_INTERPOLATE_VOLUME
                float fDeltaL  = pFinalParam->fFinalVolumeDeltaLeft;
                float fDeltaR  = pFinalParam->fFinalVolumeDeltaRight;
#endif
                switch (CHANNELS) {
                    case MONO: {
                        float samplePoint;
                        if (INTERPOLATE) {
                            double dPos    = pFinalParam->dPos;
                            float fPitch   = pFinalParam->fFinalPitch;
                            if (USEFILTER) {
                                Filter filterL = pFinalParam->filterLeft;
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
                                    samplePoint = filterL.Apply(samplePoint);
#ifdef CONFIG_INTERPOLATE_VOLUME
                                    fVolumeL += fDeltaL;
                                    fVolumeR += fDeltaR;
#endif
                                    pOutL[i] += samplePoint * fVolumeL;
                                    pOutR[i] += samplePoint * fVolumeR;
                                }
                            } else { // no filter needed
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
#ifdef CONFIG_INTERPOLATE_VOLUME
                                    fVolumeL += fDeltaL;
                                    fVolumeR += fDeltaR;
#endif
                                    pOutL[i] += samplePoint * fVolumeL;
                                    pOutR[i] += samplePoint * fVolumeR;
                                }
                            }
                            pFinalParam->dPos = dPos;
                        } else { // no interpolation
                            int pos_offset = (int) pFinalParam->dPos;
                            if (USEFILTER) {
                                Filter filterL = pFinalParam->filterLeft;
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = pSrc[i + pos_offset];
                                    samplePoint = filterL.Apply(samplePoint);
#ifdef CONFIG_INTERPOLATE_VOLUME
                                    fVolumeL += fDeltaL;
                                    fVolumeR += fDeltaR;
#endif
                                    pOutL[i] += samplePoint * fVolumeL;
                                    pOutR[i] += samplePoint * fVolumeR;
                                }
                            } else { // no filter needed
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = pSrc[i + pos_offset];
#ifdef CONFIG_INTERPOLATE_VOLUME
                                    fVolumeL += fDeltaL;
                                    fVolumeR += fDeltaR;
#endif
                                    pOutL[i] += samplePoint * fVolumeL;
                                    pOutR[i] += samplePoint * fVolumeR;
                                }
                            }
                            pFinalParam->dPos += uiToGo;
                        }
                        break;
                    }
                    case STEREO: {
                        stereo_sample_t samplePoint;
                        if (INTERPOLATE) {
                            double dPos    = pFinalParam->dPos;
                            float fPitch   = pFinalParam->fFinalPitch;
                            if (USEFILTER) {
                                Filter filterL = pFinalParam->filterLeft;
                                Filter filterR = pFinalParam->filterRight;
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
                                    samplePoint.left  = filterL.Apply(samplePoint.left);
                                    samplePoint.right = filterR.Apply(samplePoint.right);
#ifdef CONFIG_INTERPOLATE_VOLUME
                                    fVolumeL += fDeltaL;
                                    fVolumeR += fDeltaR;
#endif
                                    pOutL[i] += samplePoint.left  * fVolumeL;
                                    pOutR[i] += samplePoint.right * fVolumeR;
                                }
                            } else { // no filter needed
                                for (int i = 0; i < uiToGo; ++i) {
                                    samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
#ifdef CONFIG_INTERPOLATE_VOLUME
                                    fVolumeL += fDeltaL;
                                    fVolumeR += fDeltaR;
#endif
                                    pOutL[i] += samplePoint.left  * fVolumeL;
                                    pOutR[i] += samplePoint.right * fVolumeR;
                                }
                            }
                            pFinalParam->dPos = dPos;
                        } else { // no interpolation
                            int pos_offset = ((int) pFinalParam->dPos) << 1;
                            if (USEFILTER) {
                                Filter filterL = pFinalParam->filterLeft;
                                Filter filterR = pFinalParam->filterRight;
                                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);
#ifdef CONFIG_INTERPOLATE_VOLUME
                                    fVolumeL += fDeltaL;
                                    fVolumeR += fDeltaR;
#endif
                                    pOutL[i] += samplePoint.left  * fVolumeL;
                                    pOutR[i] += samplePoint.right * fVolumeR;
                                }
                            } else { // no filter needed
                                for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
                                    samplePoint.left  = pSrc[ii + pos_offset];
                                    samplePoint.right = pSrc[ii + pos_offset + 1];
#ifdef CONFIG_INTERPOLATE_VOLUME
                                    fVolumeL += fDeltaL;
                                    fVolumeR += fDeltaR;
#endif
                                    pOutL[i] += samplePoint.left  * fVolumeL;
                                    pOutR[i] += samplePoint.right * fVolumeR;
                                }
                            }
                            pFinalParam->dPos += uiToGo;
                        }
                        break;
                    }
                }
                pFinalParam->fFinalVolumeLeft = fVolumeL;
                pFinalParam->fFinalVolumeRight = fVolumeR;
                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 "Filter.h"
31	#include "SynthesisParam.h"
32
33	#define SYNTHESIS_MODE_SET_INTERPOLATE(iMode,bVal) if (bVal) iMode \|= 0x01; else iMode &= ~0x01 /* (un)set mode bit 0 */
34	#define SYNTHESIS_MODE_SET_FILTER(iMode,bVal) if (bVal) iMode \|= 0x02; else iMode &= ~0x02 /* (un)set mode bit 1 */
35	#define SYNTHESIS_MODE_SET_LOOP(iMode,bVal) if (bVal) iMode \|= 0x04; else iMode &= ~0x04 /* (un)set mode bit 2 */
36	#define SYNTHESIS_MODE_SET_CHANNELS(iMode,bVal) if (bVal) iMode \|= 0x08; else iMode &= ~0x08 /* (un)set mode bit 3 */
37	#define SYNTHESIS_MODE_SET_IMPLEMENTATION(iMode,bVal) if (bVal) iMode \|= 0x10; else iMode &= ~0x10 /* (un)set mode bit 4 */
38	#define SYNTHESIS_MODE_SET_PROFILING(iMode,bVal) if (bVal) iMode \|= 0x20; else iMode &= ~0x20 /* (un)set mode bit 5 */
39
40	#define SYNTHESIS_MODE_GET_INTERPOLATE(iMode) iMode & 0x01
41	#define SYNTHESIS_MODE_GET_FILTER(iMode) iMode & 0x02
42	#define SYNTHESIS_MODE_GET_LOOP(iMode) iMode & 0x04
43	#define SYNTHESIS_MODE_GET_CHANNELS(iMode) iMode & 0x08
44	#define SYNTHESIS_MODE_GET_IMPLEMENTATION(iMode) iMode & 0x10
45
46	namespace LinuxSampler { namespace gig {
47
48	typedef void SynthesizeFragment_Fn(SynthesisParam* pFinalParam, Loop* pLoop);
49
50	void* GetSynthesisFunction(const int SynthesisMode);
51	void RunSynthesisFunction(const int SynthesisMode, SynthesisParam* pFinalParam, Loop* pLoop);
52
53	enum channels_t {
54	MONO,
55	STEREO
56	};
57
58	/** @brief Main Synthesis algorithms for the gig::Engine
59	*
60	* Implementation of the main synthesis algorithms of the Gigasampler
61	* format capable sampler engine. This means resampling / interpolation
62	* for pitching the audio signal, looping, filter and amplification.
63	*/
64	template<channels_t CHANNELS, bool DOLOOP, bool USEFILTER, bool INTERPOLATE>
65	class Synthesizer : public __RTMath<CPP>, public LinuxSampler::Resampler<INTERPOLATE> {
66
67	// declarations of derived functions (see "Name lookup,
68	// templates, and accessing members of base classes" in
69	// the gcc manual for an explanation of why this is
70	// needed).
71	//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleMonoCPP;
72	//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleStereoCPP;
73	using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepMonoCPP;
74	using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepStereoCPP;
75
76	public:
77	//protected:
78
79	static void SynthesizeSubFragment(SynthesisParam* pFinalParam, Loop* pLoop) {
80	if (DOLOOP) {
81	const float fLoopEnd = Float(pLoop->uiEnd);
82	const float fLoopStart = Float(pLoop->uiStart);
83	const float fLoopSize = Float(pLoop->uiSize);
84	if (pLoop->uiTotalCycles) {
85	// render loop (loop count limited)
86	for (; pFinalParam->uiToGo > 0 && pLoop->uiCyclesLeft; pLoop->uiCyclesLeft -= WrapLoop(fLoopStart, fLoopSize, fLoopEnd, &pFinalParam->dPos)) {
87	const uint uiToGo = Min(pFinalParam->uiToGo, DiffToLoopEnd(fLoopEnd, &pFinalParam->dPos, pFinalParam->fFinalPitch) + 1); //TODO: instead of +1 we could also round up
88	SynthesizeSubSubFragment(pFinalParam, uiToGo);
89	}
90	// render on without loop
91	SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
92	} else { // render loop (endless loop)
93	for (; pFinalParam->uiToGo > 0; WrapLoop(fLoopStart, fLoopSize, fLoopEnd, &pFinalParam->dPos)) {
94	const uint uiToGo = Min(pFinalParam->uiToGo, DiffToLoopEnd(fLoopEnd, &pFinalParam->dPos, pFinalParam->fFinalPitch) + 1); //TODO: instead of +1 we could also round up
95	SynthesizeSubSubFragment(pFinalParam, uiToGo);
96	}
97	}
98	} else { // no looping
99	SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
100	}
101	}
102
103	/**
104	* Returns the difference to the sample's loop end.
105	*/
106	inline static int DiffToLoopEnd(const float& LoopEnd, const void* Pos, const float& Pitch) {
107	return uint((LoopEnd - ((double )Pos)) / Pitch);
108	}
109
110	#if 0
111	//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
112	inline static int WrapLoop(const int& LoopStart, const int& LoopSize, const int& LoopEnd, int& Pos) {
113	//TODO: we can easily eliminate the branch here
114	if (Pos < LoopEnd) return 0;
115	Pos = (Pos - LoopEnd) % LoopSize + LoopStart;
116	return 1;
117	}
118	#endif
119
120	/**
121	* This method handles looping of the RAM playback part of the
122	* sample, thus repositioning the playback position once the
123	* loop limit was reached. Note: looping of the disk streaming
124	* part is handled by libgig (ReadAndLoop() method which will
125	* be called by the DiskThread).
126	*/
127	inline static int WrapLoop(const float& LoopStart, const float& LoopSize, const float& LoopEnd, void* vPos) {
128	double * Pos = (double *)vPos;
129	if (*Pos < LoopEnd) return 0;
130	Pos = fmod(Pos - LoopEnd, LoopSize) + LoopStart;
131	return 1;
132	}
133
134	static void SynthesizeSubSubFragment(SynthesisParam* pFinalParam, uint uiToGo) {
135	float fVolumeL = pFinalParam->fFinalVolumeLeft;
136	float fVolumeR = pFinalParam->fFinalVolumeRight;
137	sample_t* pSrc = pFinalParam->pSrc;
138	float* pOutL = pFinalParam->pOutLeft;
139	float* pOutR = pFinalParam->pOutRight;
140	#ifdef CONFIG_INTERPOLATE_VOLUME
141	float fDeltaL = pFinalParam->fFinalVolumeDeltaLeft;
142	float fDeltaR = pFinalParam->fFinalVolumeDeltaRight;
143	#endif
144	switch (CHANNELS) {
145	case MONO: {
146	float samplePoint;
147	if (INTERPOLATE) {
148	double dPos = pFinalParam->dPos;
149	float fPitch = pFinalParam->fFinalPitch;
150	if (USEFILTER) {
151	Filter filterL = pFinalParam->filterLeft;
152	for (int i = 0; i < uiToGo; ++i) {
153	samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
154	samplePoint = filterL.Apply(samplePoint);
155	#ifdef CONFIG_INTERPOLATE_VOLUME
156	fVolumeL += fDeltaL;
157	fVolumeR += fDeltaR;
158	#endif
159	pOutL[i] += samplePoint * fVolumeL;
160	pOutR[i] += samplePoint * fVolumeR;
161	}
162	} else { // no filter needed
163	for (int i = 0; i < uiToGo; ++i) {
164	samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
165	#ifdef CONFIG_INTERPOLATE_VOLUME
166	fVolumeL += fDeltaL;
167	fVolumeR += fDeltaR;
168	#endif
169	pOutL[i] += samplePoint * fVolumeL;
170	pOutR[i] += samplePoint * fVolumeR;
171	}
172	}
173	pFinalParam->dPos = dPos;
174	} else { // no interpolation
175	int pos_offset = (int) pFinalParam->dPos;
176	if (USEFILTER) {
177	Filter filterL = pFinalParam->filterLeft;
178	for (int i = 0; i < uiToGo; ++i) {
179	samplePoint = pSrc[i + pos_offset];
180	samplePoint = filterL.Apply(samplePoint);
181	#ifdef CONFIG_INTERPOLATE_VOLUME
182	fVolumeL += fDeltaL;
183	fVolumeR += fDeltaR;
184	#endif
185	pOutL[i] += samplePoint * fVolumeL;
186	pOutR[i] += samplePoint * fVolumeR;
187	}
188	} else { // no filter needed
189	for (int i = 0; i < uiToGo; ++i) {
190	samplePoint = pSrc[i + pos_offset];
191	#ifdef CONFIG_INTERPOLATE_VOLUME
192	fVolumeL += fDeltaL;
193	fVolumeR += fDeltaR;
194	#endif
195	pOutL[i] += samplePoint * fVolumeL;
196	pOutR[i] += samplePoint * fVolumeR;
197	}
198	}
199	pFinalParam->dPos += uiToGo;
200	}
201	break;
202	}
203	case STEREO: {
204	stereo_sample_t samplePoint;
205	if (INTERPOLATE) {
206	double dPos = pFinalParam->dPos;
207	float fPitch = pFinalParam->fFinalPitch;
208	if (USEFILTER) {
209	Filter filterL = pFinalParam->filterLeft;
210	Filter filterR = pFinalParam->filterRight;
211	for (int i = 0; i < uiToGo; ++i) {
212	samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
213	samplePoint.left = filterL.Apply(samplePoint.left);
214	samplePoint.right = filterR.Apply(samplePoint.right);
215	#ifdef CONFIG_INTERPOLATE_VOLUME
216	fVolumeL += fDeltaL;
217	fVolumeR += fDeltaR;
218	#endif
219	pOutL[i] += samplePoint.left * fVolumeL;
220	pOutR[i] += samplePoint.right * fVolumeR;
221	}
222	} else { // no filter needed
223	for (int i = 0; i < uiToGo; ++i) {
224	samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
225	#ifdef CONFIG_INTERPOLATE_VOLUME
226	fVolumeL += fDeltaL;
227	fVolumeR += fDeltaR;
228	#endif
229	pOutL[i] += samplePoint.left * fVolumeL;
230	pOutR[i] += samplePoint.right * fVolumeR;
231	}
232	}
233	pFinalParam->dPos = dPos;
234	} else { // no interpolation
235	int pos_offset = ((int) pFinalParam->dPos) << 1;
236	if (USEFILTER) {
237	Filter filterL = pFinalParam->filterLeft;
238	Filter filterR = pFinalParam->filterRight;
239	for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
240	samplePoint.left = pSrc[ii + pos_offset];
241	samplePoint.right = pSrc[ii + pos_offset + 1];
242	samplePoint.left = filterL.Apply(samplePoint.left);
243	samplePoint.right = filterR.Apply(samplePoint.right);
244	#ifdef CONFIG_INTERPOLATE_VOLUME
245	fVolumeL += fDeltaL;
246	fVolumeR += fDeltaR;
247	#endif
248	pOutL[i] += samplePoint.left * fVolumeL;
249	pOutR[i] += samplePoint.right * fVolumeR;
250	}
251	} else { // no filter needed
252	for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
253	samplePoint.left = pSrc[ii + pos_offset];
254	samplePoint.right = pSrc[ii + pos_offset + 1];
255	#ifdef CONFIG_INTERPOLATE_VOLUME
256	fVolumeL += fDeltaL;
257	fVolumeR += fDeltaR;
258	#endif
259	pOutL[i] += samplePoint.left * fVolumeL;
260	pOutR[i] += samplePoint.right * fVolumeR;
261	}
262	}
263	pFinalParam->dPos += uiToGo;
264	}
265	break;
266	}
267	}
268	pFinalParam->fFinalVolumeLeft = fVolumeL;
269	pFinalParam->fFinalVolumeRight = fVolumeR;
270	pFinalParam->pOutRight += uiToGo;
271	pFinalParam->pOutLeft += uiToGo;
272	pFinalParam->uiToGo -= uiToGo;
273	}
274	};
275
276	}} // namespace LinuxSampler::gig
277
278	#endif // __LS_GIG_SYNTHESIZER_H__