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	schoenebeck	320	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	schoenebeck	411	* Copyright (C) 2005 Christian Schoenebeck *
7	schoenebeck	320	* *
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	schoenebeck	328	#include "../../common/global.h"
28	schoenebeck	320	#include "../../common/RTMath.h"
29			#include "../common/Resampler.h"
30			#include "Filter.h"
31	schoenebeck	770	#include "SynthesisParam.h"
32	schoenebeck	320
33	schoenebeck	738	#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	schoenebeck	770	#define SYNTHESIS_MODE_SET_PROFILING(iMode,bVal) if (bVal) iMode \|= 0x20; else iMode &= ~0x20 /* (un)set mode bit 5 */
39	schoenebeck	320
40	schoenebeck	738	#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	schoenebeck	320	namespace LinuxSampler { namespace gig {
47
48	schoenebeck	770	typedef void SynthesizeFragment_Fn(SynthesisParam* pFinalParam, Loop* pLoop);
49	schoenebeck	320
50			void* GetSynthesisFunction(const int SynthesisMode);
51	schoenebeck	770	void RunSynthesisFunction(const int SynthesisMode, SynthesisParam* pFinalParam, Loop* pLoop);
52	schoenebeck	320
53			enum channels_t {
54			MONO,
55			STEREO
56			};
57
58	schoenebeck	563	/** @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	schoenebeck	770	template<channels_t CHANNELS, bool DOLOOP, bool USEFILTER, bool INTERPOLATE>
65			class Synthesizer : public __RTMath<CPP>, public LinuxSampler::Resampler<INTERPOLATE> {
66	persson	497
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	schoenebeck	770	//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleMonoCPP;
72			//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleStereoCPP;
73			using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepMonoCPP;
74			using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepStereoCPP;
75	persson	497
76	schoenebeck	320	public:
77			//protected:
78
79	schoenebeck	770	static void SynthesizeSubFragment(SynthesisParam* pFinalParam, Loop* pLoop) {
80	schoenebeck	320	if (DOLOOP) {
81	schoenebeck	770	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	schoenebeck	320	// render loop (loop count limited)
86	schoenebeck	770	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	schoenebeck	320	}
90			// render on without loop
91	schoenebeck	770	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	schoenebeck	320	}
97			}
98	schoenebeck	770	} else { // no looping
99			SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
100	schoenebeck	320	}
101			}
102
103	schoenebeck	563	/**
104			* Returns the difference to the sample's loop end.
105			*/
106	schoenebeck	320	inline static int DiffToLoopEnd(const float& LoopEnd, const void* Pos, const float& Pitch) {
107	schoenebeck	770	return uint((LoopEnd - ((double )Pos)) / Pitch);
108	schoenebeck	320	}
109
110	schoenebeck	770	#if 0
111	schoenebeck	738	//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	schoenebeck	770	//TODO: we can easily eliminate the branch here
114			if (Pos < LoopEnd) return 0;
115			Pos = (Pos - LoopEnd) % LoopSize + LoopStart;
116			return 1;
117	schoenebeck	738	}
118	schoenebeck	770	#endif
119	schoenebeck	738
120	schoenebeck	563	/**
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	schoenebeck	320	inline static int WrapLoop(const float& LoopStart, const float& LoopSize, const float& LoopEnd, void* vPos) {
128	schoenebeck	770	double * Pos = (double *)vPos;
129			if (*Pos < LoopEnd) return 0;
130			Pos = fmod(Pos - LoopEnd, LoopSize) + LoopStart;
131			return 1;
132	schoenebeck	320	}
133
134	schoenebeck	770	static void SynthesizeSubSubFragment(SynthesisParam* pFinalParam, uint uiToGo) {
135	persson	830	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	schoenebeck	770	switch (CHANNELS) {
145			case MONO: {
146	persson	830	float samplePoint;
147	schoenebeck	770	if (INTERPOLATE) {
148	persson	830	double dPos = pFinalParam->dPos;
149			float fPitch = pFinalParam->fFinalPitch;
150	schoenebeck	770	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	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
156			fVolumeL += fDeltaL;
157			fVolumeR += fDeltaR;
158			#endif
159	schoenebeck	770	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	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
166			fVolumeL += fDeltaL;
167			fVolumeR += fDeltaR;
168			#endif
169	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
170			pOutR[i] += samplePoint * fVolumeR;
171			}
172	schoenebeck	320	}
173	persson	830	pFinalParam->dPos = dPos;
174	schoenebeck	770	} else { // no interpolation
175	persson	830	int pos_offset = (int) pFinalParam->dPos;
176	schoenebeck	770	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	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
182			fVolumeL += fDeltaL;
183			fVolumeR += fDeltaR;
184			#endif
185	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
186			pOutR[i] += samplePoint * fVolumeR;
187	schoenebeck	320	}
188	schoenebeck	770	} else { // no filter needed
189			for (int i = 0; i < uiToGo; ++i) {
190			samplePoint = pSrc[i + pos_offset];
191	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
192			fVolumeL += fDeltaL;
193			fVolumeR += fDeltaR;
194			#endif
195	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
196			pOutR[i] += samplePoint * fVolumeR;
197			}
198	schoenebeck	320	}
199	persson	830	pFinalParam->dPos += uiToGo;
200	schoenebeck	320	}
201			break;
202			}
203	schoenebeck	770	case STEREO: {
204	persson	830	stereo_sample_t samplePoint;
205	schoenebeck	770	if (INTERPOLATE) {
206	persson	830	double dPos = pFinalParam->dPos;
207			float fPitch = pFinalParam->fFinalPitch;
208	schoenebeck	770	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	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
216			fVolumeL += fDeltaL;
217			fVolumeR += fDeltaR;
218			#endif
219	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
220			pOutR[i] += samplePoint.right * fVolumeR;
221	schoenebeck	320	}
222	schoenebeck	770	} else { // no filter needed
223			for (int i = 0; i < uiToGo; ++i) {
224			samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
225	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
226			fVolumeL += fDeltaL;
227			fVolumeR += fDeltaR;
228			#endif
229	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
230			pOutR[i] += samplePoint.right * fVolumeR;
231			}
232	schoenebeck	320	}
233	persson	830	pFinalParam->dPos = dPos;
234	schoenebeck	770	} else { // no interpolation
235	persson	830	int pos_offset = ((int) pFinalParam->dPos) << 1;
236	schoenebeck	770	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	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
245			fVolumeL += fDeltaL;
246			fVolumeR += fDeltaR;
247			#endif
248	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
249			pOutR[i] += samplePoint.right * fVolumeR;
250	schoenebeck	320	}
251	schoenebeck	770	} 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	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
256			fVolumeL += fDeltaL;
257			fVolumeR += fDeltaR;
258			#endif
259	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
260			pOutR[i] += samplePoint.right * fVolumeR;
261			}
262	schoenebeck	320	}
263	persson	830	pFinalParam->dPos += uiToGo;
264	schoenebeck	320	}
265	schoenebeck	770	break;
266	schoenebeck	320	}
267			}
268	persson	830	pFinalParam->fFinalVolumeLeft = fVolumeL;
269			pFinalParam->fFinalVolumeRight = fVolumeR;
270	schoenebeck	770	pFinalParam->pOutRight += uiToGo;
271			pFinalParam->pOutLeft += uiToGo;
272			pFinalParam->uiToGo -= uiToGo;
273	schoenebeck	320	}
274			};
275
276			}} // namespace LinuxSampler::gig
277
278			#endif // __LS_GIG_SYNTHESIZER_H__