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 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 "../common/BiquadFilter.h"
31			#include "Filter.h"
32	schoenebeck	770	#include "SynthesisParam.h"
33	schoenebeck	320
34	schoenebeck	738	#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	schoenebeck	770	#define SYNTHESIS_MODE_SET_PROFILING(iMode,bVal) if (bVal) iMode \|= 0x20; else iMode &= ~0x20 /* (un)set mode bit 5 */
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			#define SYNTHESIS_MODE_GET_IMPLEMENTATION(iMode) iMode & 0x10
46
47	schoenebeck	320	namespace LinuxSampler { namespace gig {
48
49	schoenebeck	770	typedef void SynthesizeFragment_Fn(SynthesisParam* pFinalParam, Loop* pLoop);
50	schoenebeck	320
51			void* GetSynthesisFunction(const int SynthesisMode);
52	schoenebeck	770	void RunSynthesisFunction(const int SynthesisMode, SynthesisParam* pFinalParam, Loop* pLoop);
53	schoenebeck	320
54			enum channels_t {
55			MONO,
56			STEREO
57			};
58
59	schoenebeck	563	/** @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	schoenebeck	770	template<channels_t CHANNELS, bool DOLOOP, bool USEFILTER, bool INTERPOLATE>
66			class Synthesizer : public __RTMath<CPP>, public LinuxSampler::Resampler<INTERPOLATE> {
67	persson	497
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	schoenebeck	770	//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleMonoCPP;
73			//using LinuxSampler::Resampler<INTERPOLATE>::GetNextSampleStereoCPP;
74			using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepMonoCPP;
75			using LinuxSampler::Resampler<INTERPOLATE>::Interpolate1StepStereoCPP;
76	persson	497
77	schoenebeck	320	public:
78			//protected:
79
80	schoenebeck	770	static void SynthesizeSubFragment(SynthesisParam* pFinalParam, Loop* pLoop) {
81	schoenebeck	320	if (DOLOOP) {
82	schoenebeck	770	const float fLoopEnd = Float(pLoop->uiEnd);
83			const float fLoopStart = Float(pLoop->uiStart);
84			const float fLoopSize = Float(pLoop->uiSize);
85			if (pLoop->uiTotalCycles) {
86	schoenebeck	320	// render loop (loop count limited)
87	schoenebeck	770	for (; pFinalParam->uiToGo > 0 && pLoop->uiCyclesLeft; pLoop->uiCyclesLeft -= WrapLoop(fLoopStart, fLoopSize, fLoopEnd, &pFinalParam->dPos)) {
88			const uint uiToGo = Min(pFinalParam->uiToGo, DiffToLoopEnd(fLoopEnd, &pFinalParam->dPos, pFinalParam->fFinalPitch) + 1); //TODO: instead of +1 we could also round up
89			SynthesizeSubSubFragment(pFinalParam, uiToGo);
90	schoenebeck	320	}
91			// render on without loop
92	schoenebeck	770	SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
93			} else { // render loop (endless loop)
94			for (; pFinalParam->uiToGo > 0; WrapLoop(fLoopStart, fLoopSize, fLoopEnd, &pFinalParam->dPos)) {
95			const uint uiToGo = Min(pFinalParam->uiToGo, DiffToLoopEnd(fLoopEnd, &pFinalParam->dPos, pFinalParam->fFinalPitch) + 1); //TODO: instead of +1 we could also round up
96			SynthesizeSubSubFragment(pFinalParam, uiToGo);
97	schoenebeck	320	}
98			}
99	schoenebeck	770	} else { // no looping
100			SynthesizeSubSubFragment(pFinalParam, pFinalParam->uiToGo);
101	schoenebeck	320	}
102			}
103
104	schoenebeck	563	/**
105			* Returns the difference to the sample's loop end.
106			*/
107	schoenebeck	320	inline static int DiffToLoopEnd(const float& LoopEnd, const void* Pos, const float& Pitch) {
108	schoenebeck	770	return uint((LoopEnd - ((double )Pos)) / Pitch);
109	schoenebeck	320	}
110
111	schoenebeck	770	#if 0
112	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
113			inline static int WrapLoop(const int& LoopStart, const int& LoopSize, const int& LoopEnd, int& Pos) {
114	schoenebeck	770	//TODO: we can easily eliminate the branch here
115			if (Pos < LoopEnd) return 0;
116			Pos = (Pos - LoopEnd) % LoopSize + LoopStart;
117			return 1;
118	schoenebeck	738	}
119	schoenebeck	770	#endif
120	schoenebeck	738
121	schoenebeck	563	/**
122			* This method handles looping of the RAM playback part of the
123			* sample, thus repositioning the playback position once the
124			* loop limit was reached. Note: looping of the disk streaming
125			* part is handled by libgig (ReadAndLoop() method which will
126			* be called by the DiskThread).
127			*/
128	schoenebeck	320	inline static int WrapLoop(const float& LoopStart, const float& LoopSize, const float& LoopEnd, void* vPos) {
129	schoenebeck	770	double * Pos = (double *)vPos;
130			if (*Pos < LoopEnd) return 0;
131			Pos = fmod(Pos - LoopEnd, LoopSize) + LoopStart;
132			return 1;
133	schoenebeck	320	}
134
135	schoenebeck	770	static void SynthesizeSubSubFragment(SynthesisParam* pFinalParam, uint uiToGo) {
136	persson	830	float fVolumeL = pFinalParam->fFinalVolumeLeft;
137			float fVolumeR = pFinalParam->fFinalVolumeRight;
138			sample_t* pSrc = pFinalParam->pSrc;
139			float* pOutL = pFinalParam->pOutLeft;
140			float* pOutR = pFinalParam->pOutRight;
141			#ifdef CONFIG_INTERPOLATE_VOLUME
142			float fDeltaL = pFinalParam->fFinalVolumeDeltaLeft;
143			float fDeltaR = pFinalParam->fFinalVolumeDeltaRight;
144			#endif
145	schoenebeck	770	switch (CHANNELS) {
146			case MONO: {
147	persson	830	float samplePoint;
148	schoenebeck	770	if (INTERPOLATE) {
149	persson	830	double dPos = pFinalParam->dPos;
150			float fPitch = pFinalParam->fFinalPitch;
151	schoenebeck	770	if (USEFILTER) {
152			Filter filterL = pFinalParam->filterLeft;
153			for (int i = 0; i < uiToGo; ++i) {
154			samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
155			samplePoint = filterL.Apply(samplePoint);
156	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
157			fVolumeL += fDeltaL;
158			fVolumeR += fDeltaR;
159			#endif
160	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
161			pOutR[i] += samplePoint * fVolumeR;
162			}
163			} else { // no filter needed
164			for (int i = 0; i < uiToGo; ++i) {
165			samplePoint = Interpolate1StepMonoCPP(pSrc, &dPos, fPitch);
166	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
167			fVolumeL += fDeltaL;
168			fVolumeR += fDeltaR;
169			#endif
170	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
171			pOutR[i] += samplePoint * fVolumeR;
172			}
173	schoenebeck	320	}
174	persson	830	pFinalParam->dPos = dPos;
175	schoenebeck	770	} else { // no interpolation
176	persson	830	int pos_offset = (int) pFinalParam->dPos;
177	schoenebeck	770	if (USEFILTER) {
178			Filter filterL = pFinalParam->filterLeft;
179			for (int i = 0; i < uiToGo; ++i) {
180			samplePoint = pSrc[i + pos_offset];
181			samplePoint = filterL.Apply(samplePoint);
182	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
183			fVolumeL += fDeltaL;
184			fVolumeR += fDeltaR;
185			#endif
186	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
187			pOutR[i] += samplePoint * fVolumeR;
188	schoenebeck	320	}
189	schoenebeck	770	} else { // no filter needed
190			for (int i = 0; i < uiToGo; ++i) {
191			samplePoint = pSrc[i + pos_offset];
192	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
193			fVolumeL += fDeltaL;
194			fVolumeR += fDeltaR;
195			#endif
196	schoenebeck	770	pOutL[i] += samplePoint * fVolumeL;
197			pOutR[i] += samplePoint * fVolumeR;
198			}
199	schoenebeck	320	}
200	persson	830	pFinalParam->dPos += uiToGo;
201	schoenebeck	320	}
202			break;
203			}
204	schoenebeck	770	case STEREO: {
205	persson	830	stereo_sample_t samplePoint;
206	schoenebeck	770	if (INTERPOLATE) {
207	persson	830	double dPos = pFinalParam->dPos;
208			float fPitch = pFinalParam->fFinalPitch;
209	schoenebeck	770	if (USEFILTER) {
210			Filter filterL = pFinalParam->filterLeft;
211			Filter filterR = pFinalParam->filterRight;
212			for (int i = 0; i < uiToGo; ++i) {
213			samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
214			samplePoint.left = filterL.Apply(samplePoint.left);
215			samplePoint.right = filterR.Apply(samplePoint.right);
216	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
217			fVolumeL += fDeltaL;
218			fVolumeR += fDeltaR;
219			#endif
220	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
221			pOutR[i] += samplePoint.right * fVolumeR;
222	schoenebeck	320	}
223	schoenebeck	770	} else { // no filter needed
224			for (int i = 0; i < uiToGo; ++i) {
225			samplePoint = Interpolate1StepStereoCPP(pSrc, &dPos, fPitch);
226	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
227			fVolumeL += fDeltaL;
228			fVolumeR += fDeltaR;
229			#endif
230	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
231			pOutR[i] += samplePoint.right * fVolumeR;
232			}
233	schoenebeck	320	}
234	persson	830	pFinalParam->dPos = dPos;
235	schoenebeck	770	} else { // no interpolation
236	persson	830	int pos_offset = ((int) pFinalParam->dPos) << 1;
237	schoenebeck	770	if (USEFILTER) {
238			Filter filterL = pFinalParam->filterLeft;
239			Filter filterR = pFinalParam->filterRight;
240			for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
241			samplePoint.left = pSrc[ii + pos_offset];
242			samplePoint.right = pSrc[ii + pos_offset + 1];
243			samplePoint.left = filterL.Apply(samplePoint.left);
244			samplePoint.right = filterR.Apply(samplePoint.right);
245	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
246			fVolumeL += fDeltaL;
247			fVolumeR += fDeltaR;
248			#endif
249	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
250			pOutR[i] += samplePoint.right * fVolumeR;
251	schoenebeck	320	}
252	schoenebeck	770	} else { // no filter needed
253			for (int i = 0, ii = 0; i < uiToGo; ++i, ii+=2) {
254			samplePoint.left = pSrc[ii + pos_offset];
255			samplePoint.right = pSrc[ii + pos_offset + 1];
256	persson	830	#ifdef CONFIG_INTERPOLATE_VOLUME
257			fVolumeL += fDeltaL;
258			fVolumeR += fDeltaR;
259			#endif
260	schoenebeck	770	pOutL[i] += samplePoint.left * fVolumeL;
261			pOutR[i] += samplePoint.right * fVolumeR;
262			}
263	schoenebeck	320	}
264	persson	830	pFinalParam->dPos += uiToGo;
265	schoenebeck	320	}
266	schoenebeck	770	break;
267	schoenebeck	320	}
268			}
269	persson	830	pFinalParam->fFinalVolumeLeft = fVolumeL;
270			pFinalParam->fFinalVolumeRight = fVolumeR;
271	schoenebeck	770	pFinalParam->pOutRight += uiToGo;
272			pFinalParam->pOutLeft += uiToGo;
273			pFinalParam->uiToGo -= uiToGo;
274	schoenebeck	320	}
275			};
276
277			}} // namespace LinuxSampler::gig
278
279			#endif // __LS_GIG_SYNTHESIZER_H__