/[svn]/linuxsampler/trunk/src/engines/gig/Voice.h
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Diff of /linuxsampler/trunk/src/engines/gig/Voice.h

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revision 203 by schoenebeck, Tue Jul 13 22:44:13 2004 UTC revision 236 by schoenebeck, Thu Sep 9 18:44:18 2004 UTC
# Line 92  namespace LinuxSampler { namespace gig { Line 92  namespace LinuxSampler { namespace gig {
92              void Reset();              void Reset();
93              void SetOutput(AudioOutputDevice* pAudioOutputDevice);              void SetOutput(AudioOutputDevice* pAudioOutputDevice);
94              void SetEngine(Engine* pEngine);              void SetEngine(Engine* pEngine);
95              int  Trigger(Event* pNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument);              int  Trigger(Event* pNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument, int iLayer = 0);
96              inline bool IsActive() { return Active; }              inline bool IsActive() { return Active; }
97          private:          private:
98              // Types              // Types
# Line 105  namespace LinuxSampler { namespace gig { Line 105  namespace LinuxSampler { namespace gig {
105              // Attributes              // Attributes
106              gig::Engine*                pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.              gig::Engine*                pEngine;            ///< Pointer to the sampler engine, to be able to access the event lists.
107              float                       Volume;             ///< Volume level of the voice              float                       Volume;             ///< Volume level of the voice
108              float*                      pOutputLeft;        ///< Audio output channel buffer (left)              float                       CrossfadeVolume;    ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course)
             float*                      pOutputRight;       ///< Audio output channel buffer (right)  
             uint                        SampleRate;         ///< Sample rate of the engines output audio signal (in Hz)  
             uint                        MaxSamplesPerCycle; ///< Size of each audio output buffer  
109              double                      Pos;                ///< Current playback position in sample              double                      Pos;                ///< Current playback position in sample
110              double                      PitchBase;          ///< Basic pitch depth, stays the same for the whole life time of the voice              double                      PitchBase;          ///< Basic pitch depth, stays the same for the whole life time of the voice
111              double                      PitchBend;          ///< Current pitch value of the pitchbend wheel              double                      PitchBend;          ///< Current pitch value of the pitchbend wheel
112              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back              ::gig::Sample*              pSample;            ///< Pointer to the sample to be played back
113              ::gig::Region*              pRegion;            ///< Pointer to the articulation information of the respective keyboard region of this voice              ::gig::Region*              pRegion;            ///< Pointer to the articulation information of the respective keyboard region of this voice
114                ::gig::DimensionRegion*     pDimRgn;            ///< Pointer to the articulation information of current dimension region of this voice
115              bool                        Active;             ///< If this voice object is currently in usage              bool                        Active;             ///< If this voice object is currently in usage
116              playback_state_t            PlaybackState;      ///< When a sample will be triggered, it will be first played from RAM cache and after a couple of sample points it will switch to disk streaming and at the end of a disk stream we have to add null samples, so the interpolator can do it's work correctly              playback_state_t            PlaybackState;      ///< When a sample will be triggered, it will be first played from RAM cache and after a couple of sample points it will switch to disk streaming and at the end of a disk stream we have to add null samples, so the interpolator can do it's work correctly
117              bool                        DiskVoice;          ///< If the sample is very short it completely fits into the RAM cache and doesn't need to be streamed from disk, in that case this flag is set to false              bool                        DiskVoice;          ///< If the sample is very short it completely fits into the RAM cache and doesn't need to be streamed from disk, in that case this flag is set to false
# Line 159  namespace LinuxSampler { namespace gig { Line 157  namespace LinuxSampler { namespace gig {
157                  #if USE_LINEAR_INTERPOLATION                  #if USE_LINEAR_INTERPOLATION
158                      #if ENABLE_FILTER                      #if ENABLE_FILTER
159                          // left channel                          // left channel
160                          pOutputLeft[i]    += this->FilterLeft.Apply(&bq_base, &bq_main, effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int])));                          pEngine->pOutputLeft[i]    += this->FilterLeft.Apply(&bq_base, &bq_main, effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int])));
161                          // right channel                          // right channel
162                          pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1])));                          pEngine->pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1])));
163                      #else // no filter                      #else // no filter
164                          // left channel                          // left channel
165                          pOutputLeft[i]    += effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int]));                          pEngine->pOutputLeft[i]    += effective_volume * (pSrc[pos_int]   + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int]));
166                          // right channel                          // right channel
167                          pOutputRight[i++] += effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1]));                          pEngine->pOutputRight[i++] += effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1]));
168                      #endif // ENABLE_FILTER                      #endif // ENABLE_FILTER
169                  #else // polynomial interpolation                  #else // polynomial interpolation
170                      // calculate left channel                      // calculate left channel
# Line 178  namespace LinuxSampler { namespace gig { Line 176  namespace LinuxSampler { namespace gig {
176                      float b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;                      float b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;
177                      float c   = (x1 - xm1) * 0.5f;                      float c   = (x1 - xm1) * 0.5f;
178                      #if ENABLE_FILTER                      #if ENABLE_FILTER
179                          pOutputLeft[i] += this->FilterLeft.Apply(&bq_base, &bq_main, effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));                          pEngine->pOutputLeft[i] += this->FilterLeft.Apply(&bq_base, &bq_main, effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));
180                      #else // no filter                      #else // no filter
181                          pOutputLeft[i] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);                          pEngine->pOutputLeft[i] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);
182                      #endif // ENABLE_FILTER                      #endif // ENABLE_FILTER
183    
184                      //calculate right channel                      //calculate right channel
# Line 192  namespace LinuxSampler { namespace gig { Line 190  namespace LinuxSampler { namespace gig {
190                      b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;                      b   = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f;
191                      c   = (x1 - xm1) * 0.5f;                      c   = (x1 - xm1) * 0.5f;
192                      #if ENABLE_FILTER                      #if ENABLE_FILTER
193                          pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));                          pEngine->pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0));
194                      #else // no filter                      #else // no filter
195                          pOutputRight[i++] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);                          pEngine->pOutputRight[i++] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0);
196                      #endif // ENABLE_FILTER                      #endif // ENABLE_FILTER
197                  #endif // USE_LINEAR_INTERPOLATION                  #endif // USE_LINEAR_INTERPOLATION
198    
# Line 222  namespace LinuxSampler { namespace gig { Line 220  namespace LinuxSampler { namespace gig {
220                      sample_point = this->FilterLeft.Apply(&bq_base, &bq_main, sample_point);                      sample_point = this->FilterLeft.Apply(&bq_base, &bq_main, sample_point);
221                  #endif // ENABLE_FILTER                  #endif // ENABLE_FILTER
222    
223                  pOutputLeft[i]    += sample_point;                  pEngine->pOutputLeft[i]    += sample_point;
224                  pOutputRight[i++] += sample_point;                  pEngine->pOutputRight[i++] += sample_point;
225    
226                  this->Pos += pitch;                  this->Pos += pitch;
227              }              }
228    
229                inline float CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) {
230                    return (CrossfadeControllerValue <= pDimRgn->Crossfade.in_start)  ? 0.0f
231                         : (CrossfadeControllerValue < pDimRgn->Crossfade.in_end)     ? float(CrossfadeControllerValue - pDimRgn->Crossfade.in_start) / float(pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start)
232                         : (CrossfadeControllerValue <= pDimRgn->Crossfade.out_start) ? 1.0f
233                         : (CrossfadeControllerValue < pDimRgn->Crossfade.out_end)    ? float(CrossfadeControllerValue - pDimRgn->Crossfade.out_start) / float(pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start)
234                         : 0.0f;
235                }
236    
237              inline float Constrain(float ValueToCheck, float Min, float Max) {              inline float Constrain(float ValueToCheck, float Min, float Max) {
238                  if      (ValueToCheck > Max) ValueToCheck = Max;                  if      (ValueToCheck > Max) ValueToCheck = Max;
239                  else if (ValueToCheck < Min) ValueToCheck = Min;                  else if (ValueToCheck < Min) ValueToCheck = Min;
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