/[svn]/linuxsampler/trunk/src/voice.cpp
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Diff of /linuxsampler/trunk/src/voice.cpp

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revision 30 by schoenebeck, Sun Jan 11 16:43:54 2004 UTC revision 31 by schoenebeck, Sun Jan 18 20:31:31 2004 UTC
# Line 75  int Voice::Trigger(int MIDIKey, uint8_t Line 75  int Voice::Trigger(int MIDIKey, uint8_t
75      DiskVoice          = cachedsamples < pSample->SamplesTotal;      DiskVoice          = cachedsamples < pSample->SamplesTotal;
76    
77      if (DiskVoice) { // voice to be streamed from disk      if (DiskVoice) { // voice to be streamed from disk
78          MaxRAMPos = cachedsamples - (OutputBufferSize << MAX_PITCH) / pSample->Channels;          MaxRAMPos = cachedsamples - (MaxSamplesPerCycle << MAX_PITCH) / pSample->Channels;
79    
80          // check if there's a loop defined which completely fits into the cached (RAM) part of the sample          // check if there's a loop defined which completely fits into the cached (RAM) part of the sample
81          if (pSample->Loops && pSample->LoopEnd <= MaxRAMPos) {          if (pSample->Loops && pSample->LoopEnd <= MaxRAMPos) {
# Line 89  int Voice::Trigger(int MIDIKey, uint8_t Line 89  int Voice::Trigger(int MIDIKey, uint8_t
89              Kill();              Kill();
90              return -1;              return -1;
91          }          }
92          dmsg(4,("Disk voice launched (cached samples: %d, total Samples: %d, MaxRAMPos: %d, RAMLooping: %s\n", cachedsamples, pSample->SamplesTotal, MaxRAMPos, (RAMLoop) ? "yes" : "no"));          dmsg(4,("Disk voice launched (cached samples: %d, total Samples: %d, MaxRAMPos: %d, RAMLooping: %s)\n", cachedsamples, pSample->SamplesTotal, MaxRAMPos, (RAMLoop) ? "yes" : "no"));
93      }      }
94      else { // RAM only voice      else { // RAM only voice
95          MaxRAMPos = cachedsamples;          MaxRAMPos = cachedsamples;
# Line 126  int Voice::Trigger(int MIDIKey, uint8_t Line 126  int Voice::Trigger(int MIDIKey, uint8_t
126   *  will automatically switch to disk playback for the next RenderAudio()   *  will automatically switch to disk playback for the next RenderAudio()
127   *  call.   *  call.
128   */   */
129  void Voice::RenderAudio() {  void Voice::Render(uint Samples) {
130    
131      // Let all modulators throw their parameter changes for the current audio fragment      // Let all modulators throw their parameter changes for the current audio fragment
132      ModulationSystem::ResetDestinationParameter(ModulationSystem::destination_vca, this->Volume);      ModulationSystem::ResetDestinationParameter(ModulationSystem::destination_vca, this->Volume);
133      EG1.ProcessFragment();      EG1.Process(Samples);
134    
135    
136      switch (this->PlaybackState) {      switch (this->PlaybackState) {
137    
138          case playback_state_ram: {          case playback_state_ram: {
139                  if (RAMLoop) InterpolateAndLoop((sample_t*) pSample->GetCache().pStart);                  if (RAMLoop) InterpolateAndLoop(Samples, (sample_t*) pSample->GetCache().pStart);
140                  else         Interpolate((sample_t*) pSample->GetCache().pStart);                  else         Interpolate(Samples, (sample_t*) pSample->GetCache().pStart);
141                  if (DiskVoice) {                  if (DiskVoice) {
142                      // check if we reached the allowed limit of the sample RAM cache                      // check if we reached the allowed limit of the sample RAM cache
143                      if (Pos > MaxRAMPos) {                      if (Pos > MaxRAMPos) {
# Line 165  void Voice::RenderAudio() { Line 165  void Voice::RenderAudio() {
165                  }                  }
166    
167                  // add silence sample at the end if we reached the end of the stream (for the interpolator)                  // add silence sample at the end if we reached the end of the stream (for the interpolator)
168                  if (DiskStreamRef.State == Stream::state_end && DiskStreamRef.pStream->GetReadSpace() < (OutputBufferSize << MAX_PITCH) / pSample->Channels) {                  if (DiskStreamRef.State == Stream::state_end && DiskStreamRef.pStream->GetReadSpace() < (MaxSamplesPerCycle << MAX_PITCH) / pSample->Channels) {
169                      DiskStreamRef.pStream->WriteSilence((OutputBufferSize << MAX_PITCH) / pSample->Channels);                      DiskStreamRef.pStream->WriteSilence((MaxSamplesPerCycle << MAX_PITCH) / pSample->Channels);
170                      this->PlaybackState = playback_state_end;                      this->PlaybackState = playback_state_end;
171                  }                  }
172    
173                  sample_t* ptr = DiskStreamRef.pStream->GetReadPtr(); // get the current read_ptr within the ringbuffer where we read the samples from                  sample_t* ptr = DiskStreamRef.pStream->GetReadPtr(); // get the current read_ptr within the ringbuffer where we read the samples from
174                  Interpolate(ptr);                  Interpolate(Samples, ptr);
175                  DiskStreamRef.pStream->IncrementReadPos(double_to_int(Pos) * pSample->Channels);                  DiskStreamRef.pStream->IncrementReadPos(double_to_int(Pos) * pSample->Channels);
176                  Pos -= double_to_int(Pos);                  Pos -= double_to_int(Pos);
177              }              }
# Line 191  void Voice::RenderAudio() { Line 191  void Voice::RenderAudio() {
191   *   *
192   *  @param pSrc - pointer to input sample data   *  @param pSrc - pointer to input sample data
193   */   */
194  void Voice::Interpolate(sample_t* pSrc) {  void Voice::Interpolate(uint Samples, sample_t* pSrc) {
195      int i = 0;      int i = 0;
     float e = 1.0;  
196    
197      // FIXME: assuming either mono or stereo      // FIXME: assuming either mono or stereo
198      if (this->pSample->Channels == 2) { // Stereo Sample      if (this->pSample->Channels == 2) { // Stereo Sample
199          while (i < this->OutputBufferSize) {          while (i < Samples) {
200              InterpolateOneStep_Stereo(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i>>1]);              InterpolateOneStep_Stereo(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i]);
201          }          }
202      }      }
203      else { // Mono Sample      else { // Mono Sample
204          while (i < this->OutputBufferSize) {          while (i < Samples) {
205              InterpolateOneStep_Mono(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i>>1]);              InterpolateOneStep_Mono(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i]);
206          }          }
207      }      }
208  }  }
# Line 213  void Voice::Interpolate(sample_t* pSrc) Line 212  void Voice::Interpolate(sample_t* pSrc)
212   *   *
213   *  @param pSrc - pointer to input sample data   *  @param pSrc - pointer to input sample data
214   */   */
215  void Voice::InterpolateAndLoop(sample_t* pSrc) {  void Voice::InterpolateAndLoop(uint Samples, sample_t* pSrc) {
216      int i = 0;      int i = 0;
217    
218      // FIXME: assuming either mono or stereo      // FIXME: assuming either mono or stereo
219      if (pSample->Channels == 2) { // Stereo Sample      if (pSample->Channels == 2) { // Stereo Sample
220          if (pSample->LoopPlayCount) {          if (pSample->LoopPlayCount) {
221              // render loop (loop count limited)              // render loop (loop count limited)
222              while (i < OutputBufferSize && LoopCyclesLeft) {              while (i < Samples && LoopCyclesLeft) {
223                  InterpolateOneStep_Stereo(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i>>1]);                  InterpolateOneStep_Stereo(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i]);
224                  if (Pos > pSample->LoopEnd) {                  if (Pos > pSample->LoopEnd) {
225                      Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);;                      Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);;
226                      LoopCyclesLeft--;                      LoopCyclesLeft--;
227                  }                  }
228              }              }
229              // render on without loop              // render on without loop
230              while (i < OutputBufferSize) {              while (i < Samples) {
231                  InterpolateOneStep_Stereo(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i>>1]);                  InterpolateOneStep_Stereo(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i]);
232              }              }
233          }          }
234          else { // render loop (endless loop)          else { // render loop (endless loop)
235              while (i < OutputBufferSize) {              while (i < Samples) {
236                  InterpolateOneStep_Stereo(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i>>1]);                  InterpolateOneStep_Stereo(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i]);
237                  if (Pos > pSample->LoopEnd) {                  if (Pos > pSample->LoopEnd) {
238                      Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);                      Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);
239                  }                  }
# Line 244  void Voice::InterpolateAndLoop(sample_t* Line 243  void Voice::InterpolateAndLoop(sample_t*
243      else { // Mono Sample      else { // Mono Sample
244          if (pSample->LoopPlayCount) {          if (pSample->LoopPlayCount) {
245              // render loop (loop count limited)              // render loop (loop count limited)
246              while (i < OutputBufferSize && LoopCyclesLeft) {              while (i < Samples && LoopCyclesLeft) {
247                  InterpolateOneStep_Mono(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i>>1]);                  InterpolateOneStep_Mono(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i]);
248                  if (Pos > pSample->LoopEnd) {                  if (Pos > pSample->LoopEnd) {
249                      Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);;                      Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);;
250                      LoopCyclesLeft--;                      LoopCyclesLeft--;
251                  }                  }
252              }              }
253              // render on without loop              // render on without loop
254              while (i < OutputBufferSize) {              while (i < Samples) {
255                  InterpolateOneStep_Mono(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i>>1]);                  InterpolateOneStep_Mono(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i]);
256              }              }
257          }          }
258          else { // render loop (endless loop)          else { // render loop (endless loop)
259              while (i < OutputBufferSize) {              while (i < Samples) {
260                  InterpolateOneStep_Mono(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i>>1]);                  InterpolateOneStep_Mono(pSrc, i, ModulationSystem::pDestinationParameter[ModulationSystem::destination_vca][i]);
261                  if (Pos > pSample->LoopEnd) {                  if (Pos > pSample->LoopEnd) {
262                      Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);;                      Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);;
263                  }                  }
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