engines/gig/Synthesizer.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 - 2007 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_private.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_BITDEPTH24(iMode,bVal)       if (bVal) iMode |= 0x10; else iMode &= ~0x10   /* (un)set mode bit 4 */
#define SYNTHESIS_MODE_SET_IMPLEMENTATION(iMode,bVal)   if (bVal) iMode |= 0x20; else iMode &= ~0x20   /* (un)set mode bit 5 */
#define SYNTHESIS_MODE_SET_PROFILING(iMode,bVal)        if (bVal) iMode |= 0x40; else iMode &= ~0x40   /* (un)set mode bit 6 */

#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_BITDEPTH24(iMode)            iMode & 0x10
#define SYNTHESIS_MODE_GET_IMPLEMENTATION(iMode)        iMode & 0x20


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, bool BITDEPTH24>
    class Synthesizer : public __RTMath<CPP>, public LinuxSampler::Resampler<INTERPOLATE,BITDEPTH24> {

            // 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,BITDEPTH24>::Interpolate1StepMonoCPP;
            using LinuxSampler::Resampler<INTERPOLATE,BITDEPTH24>::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 int getSample(sample_t* src, int pos) {
                if (BITDEPTH24) {
                    pos *= 3;
                    unsigned char* p = (unsigned char*)src;
                    return p[pos] << 8 | p[pos + 1] << 16 | p[pos + 2] << 24;
                } else {
                    return src[pos];
                }
            }

            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 = getSample(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 = getSample(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 = getSample(pSrc, ii + pos_offset);
                                    samplePoint.right = getSample(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 = getSample(pSrc, ii + pos_offset);
                                    samplePoint.right = getSample(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	1424	* Copyright (C) 2005 - 2007 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	1424	#include "../../common/global_private.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	persson	903	#define SYNTHESIS_MODE_SET_BITDEPTH24(iMode,bVal) if (bVal) iMode \|= 0x10; else iMode &= ~0x10 /* (un)set mode bit 4 */
38			#define SYNTHESIS_MODE_SET_IMPLEMENTATION(iMode,bVal) if (bVal) iMode \|= 0x20; else iMode &= ~0x20 /* (un)set mode bit 5 */
39			#define SYNTHESIS_MODE_SET_PROFILING(iMode,bVal) if (bVal) iMode \|= 0x40; else iMode &= ~0x40 /* (un)set mode bit 6 */
40	schoenebeck	320
41	schoenebeck	738	#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	persson	903	#define SYNTHESIS_MODE_GET_BITDEPTH24(iMode) iMode & 0x10
46			#define SYNTHESIS_MODE_GET_IMPLEMENTATION(iMode) iMode & 0x20
47	schoenebeck	738
48	persson	903
49	schoenebeck	320	namespace LinuxSampler { namespace gig {
50
51	schoenebeck	770	typedef void SynthesizeFragment_Fn(SynthesisParam* pFinalParam, Loop* pLoop);
52	schoenebeck	320
53			void* GetSynthesisFunction(const int SynthesisMode);
54	schoenebeck	770	void RunSynthesisFunction(const int SynthesisMode, SynthesisParam* pFinalParam, Loop* pLoop);
55	schoenebeck	320
56			enum channels_t {
57			MONO,
58			STEREO
59			};
60
61	schoenebeck	563	/** @brief Main Synthesis algorithms for the gig::Engine
62			*
63			* Implementation of the main synthesis algorithms of the Gigasampler
64			* format capable sampler engine. This means resampling / interpolation
65			* for pitching the audio signal, looping, filter and amplification.
66			*/
67	persson	903	template<channels_t CHANNELS, bool DOLOOP, bool USEFILTER, bool INTERPOLATE, bool BITDEPTH24>
68			class Synthesizer : public __RTMath<CPP>, public LinuxSampler::Resampler<INTERPOLATE,BITDEPTH24> {
69	persson	497
70			// declarations of derived functions (see "Name lookup,
71			// templates, and accessing members of base classes" in
72			// the gcc manual for an explanation of why this is
73			// needed).
74	schoenebeck	770	//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleMonoCPP;
75			//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleStereoCPP;
76	persson	903	using LinuxSampler::Resampler<INTERPOLATE,BITDEPTH24>::Interpolate1StepMonoCPP;
77			using LinuxSampler::Resampler<INTERPOLATE,BITDEPTH24>::Interpolate1StepStereoCPP;
78	persson	497
79	schoenebeck	320	public:
80			//protected:
81
82	schoenebeck	770	static void SynthesizeSubFragment(SynthesisParam* pFinalParam, Loop* pLoop) {
83	schoenebeck	320	if (DOLOOP) {
84	schoenebeck	770	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	schoenebeck	320	// render loop (loop count limited)
89	schoenebeck	770	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	schoenebeck	320	}
93			// render on without loop
94	schoenebeck	770	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	schoenebeck	320	}
100			}
101	schoenebeck	770	} else { // no looping
102			SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
103	schoenebeck	320	}
104			}
105
106	schoenebeck	563	/**
107			* Returns the difference to the sample's loop end.
108			*/
109	schoenebeck	320	inline static int DiffToLoopEnd(const float& LoopEnd, const void* Pos, const float& Pitch) {
110	schoenebeck	770	return uint((LoopEnd - ((double )Pos)) / Pitch);
111	schoenebeck	320	}
112
113	schoenebeck	770	#if 0
114	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
115			inline static int WrapLoop(const int& LoopStart, const int& LoopSize, const int& LoopEnd, int& Pos) {
116	schoenebeck	770	//TODO: we can easily eliminate the branch here
117			if (Pos < LoopEnd) return 0;
118			Pos = (Pos - LoopEnd) % LoopSize + LoopStart;
119			return 1;
120	schoenebeck	738	}
121	schoenebeck	770	#endif
122	schoenebeck	738
123	schoenebeck	563	/**
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	schoenebeck	320	inline static int WrapLoop(const float& LoopStart, const float& LoopSize, const float& LoopEnd, void* vPos) {
131	schoenebeck	770	double * Pos = (double *)vPos;
132			if (*Pos < LoopEnd) return 0;
133			Pos = fmod(Pos - LoopEnd, LoopSize) + LoopStart;
134			return 1;
135	schoenebeck	320	}
136
137	persson	903	static int getSample(sample_t* src, int pos) {
138			if (BITDEPTH24) {
139			pos *= 3;
140			unsigned char* p = (unsigned char*)src;
141			return p[pos] << 8 \| p[pos + 1] << 16 \| p[pos + 2] << 24;
142			} else {
143			return src[pos];
144			}
145			}
146
147	schoenebeck	770	static void SynthesizeSubSubFragment(SynthesisParam* pFinalParam, uint uiToGo) {
148	persson	830	float fVolumeL = pFinalParam->fFinalVolumeLeft;
149			float fVolumeR = pFinalParam->fFinalVolumeRight;
150			sample_t* pSrc = pFinalParam->pSrc;
151			float* pOutL = pFinalParam->pOutLeft;
152			float* pOutR = pFinalParam->pOutRight;
153			#ifdef CONFIG_INTERPOLATE_VOLUME
154			float fDeltaL = pFinalParam->fFinalVolumeDeltaLeft;
155			float fDeltaR = pFinalParam->fFinalVolumeDeltaRight;
156			#endif
157	schoenebeck	770	switch (CHANNELS) {
158			case MONO: {
159	persson	830	float samplePoint;
160	schoenebeck	770	if (INTERPOLATE) {
161	persson	830	double dPos = pFinalParam->dPos;
162			float fPitch = pFinalParam->fFinalPitch;
163	schoenebeck	770	if (USEFILTER) {
164			Filter filterL = pFinalParam->filterLeft;
165			for (int i = 0; i < uiToGo; ++i) {
166			samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
167			samplePoint = filterL.Apply(samplePoint);
168	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
169			fVolumeL += fDeltaL;
170			fVolumeR += fDeltaR;
171			#endif
172	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
173			pOutR[i] += samplePoint * fVolumeR;
174			}
175			} else { // no filter needed
176			for (int i = 0; i < uiToGo; ++i) {
177			samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
178	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
179			fVolumeL += fDeltaL;
180			fVolumeR += fDeltaR;
181			#endif
182	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
183			pOutR[i] += samplePoint * fVolumeR;
184			}
185	schoenebeck	320	}
186	persson	830	pFinalParam->dPos = dPos;
187	schoenebeck	770	} else { // no interpolation
188	persson	830	int pos_offset = (int) pFinalParam->dPos;
189	schoenebeck	770	if (USEFILTER) {
190			Filter filterL = pFinalParam->filterLeft;
191			for (int i = 0; i < uiToGo; ++i) {
192	persson	903	samplePoint = getSample(pSrc, i + pos_offset);
193	schoenebeck	770	samplePoint = filterL.Apply(samplePoint);
194	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
195			fVolumeL += fDeltaL;
196			fVolumeR += fDeltaR;
197			#endif
198	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
199			pOutR[i] += samplePoint * fVolumeR;
200	schoenebeck	320	}
201	schoenebeck	770	} else { // no filter needed
202			for (int i = 0; i < uiToGo; ++i) {
203	persson	903	samplePoint = getSample(pSrc, i + pos_offset);
204	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
205			fVolumeL += fDeltaL;
206			fVolumeR += fDeltaR;
207			#endif
208	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
209			pOutR[i] += samplePoint * fVolumeR;
210			}
211	schoenebeck	320	}
212	persson	830	pFinalParam->dPos += uiToGo;
213	schoenebeck	320	}
214			break;
215			}
216	schoenebeck	770	case STEREO: {
217	persson	830	stereo_sample_t samplePoint;
218	schoenebeck	770	if (INTERPOLATE) {
219	persson	830	double dPos = pFinalParam->dPos;
220			float fPitch = pFinalParam->fFinalPitch;
221	schoenebeck	770	if (USEFILTER) {
222			Filter filterL = pFinalParam->filterLeft;
223			Filter filterR = pFinalParam->filterRight;
224			for (int i = 0; i < uiToGo; ++i) {
225			samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
226			samplePoint.left = filterL.Apply(samplePoint.left);
227			samplePoint.right = filterR.Apply(samplePoint.right);
228	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
229			fVolumeL += fDeltaL;
230			fVolumeR += fDeltaR;
231			#endif
232	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
233			pOutR[i] += samplePoint.right * fVolumeR;
234	schoenebeck	320	}
235	schoenebeck	770	} else { // no filter needed
236			for (int i = 0; i < uiToGo; ++i) {
237			samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
238	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
239			fVolumeL += fDeltaL;
240			fVolumeR += fDeltaR;
241			#endif
242	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
243			pOutR[i] += samplePoint.right * fVolumeR;
244			}
245	schoenebeck	320	}
246	persson	830	pFinalParam->dPos = dPos;
247	schoenebeck	770	} else { // no interpolation
248	persson	830	int pos_offset = ((int) pFinalParam->dPos) << 1;
249	schoenebeck	770	if (USEFILTER) {
250			Filter filterL = pFinalParam->filterLeft;
251			Filter filterR = pFinalParam->filterRight;
252			for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
253	persson	903	samplePoint.left = getSample(pSrc, ii + pos_offset);
254			samplePoint.right = getSample(pSrc, ii + pos_offset + 1);
255	schoenebeck	770	samplePoint.left = filterL.Apply(samplePoint.left);
256			samplePoint.right = filterR.Apply(samplePoint.right);
257	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
258			fVolumeL += fDeltaL;
259			fVolumeR += fDeltaR;
260			#endif
261	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
262			pOutR[i] += samplePoint.right * fVolumeR;
263	schoenebeck	320	}
264	schoenebeck	770	} else { // no filter needed
265			for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
266	persson	903	samplePoint.left = getSample(pSrc, ii + pos_offset);
267			samplePoint.right = getSample(pSrc, ii + pos_offset + 1);
268	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
269			fVolumeL += fDeltaL;
270			fVolumeR += fDeltaR;
271			#endif
272	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
273			pOutR[i] += samplePoint.right * fVolumeR;
274			}
275	schoenebeck	320	}
276	persson	830	pFinalParam->dPos += uiToGo;
277	schoenebeck	320	}
278	schoenebeck	770	break;
279	schoenebeck	320	}
280			}
281	persson	830	pFinalParam->fFinalVolumeLeft = fVolumeL;
282			pFinalParam->fFinalVolumeRight = fVolumeR;
283	schoenebeck	770	pFinalParam->pOutRight += uiToGo;
284			pFinalParam->pOutLeft += uiToGo;
285			pFinalParam->uiToGo -= uiToGo;
286	schoenebeck	320	}
287			};
288
289			}} // namespace LinuxSampler::gig
290
291			#endif // __LS_GIG_SYNTHESIZER_H__