115 |
// Attributes |
// Attributes |
116 |
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. |
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float Volume; ///< Volume level of the voice |
float Volume; ///< Volume level of the voice |
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float PanLeft; |
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float PanRight; |
120 |
float CrossfadeVolume; ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course) |
float CrossfadeVolume; ///< Current attenuation level caused by a crossfade (only if a crossfade is defined of course) |
121 |
double Pos; ///< Current playback position in sample |
double Pos; ///< Current playback position in sample |
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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 |
160 |
#if ENABLE_FILTER |
#if ENABLE_FILTER |
161 |
void CalculateBiquadParameters(uint Samples); |
void CalculateBiquadParameters(uint Samples); |
162 |
#endif // ENABLE_FILTER |
#endif // ENABLE_FILTER |
163 |
void Interpolate(uint Samples, sample_t* pSrc, uint Skip); |
void InterpolateNoLoop(uint Samples, sample_t* pSrc, uint Skip); |
164 |
void InterpolateAndLoop(uint Samples, sample_t* pSrc, uint Skip); |
void InterpolateAndLoop(uint Samples, sample_t* pSrc, uint Skip); |
165 |
inline void InterpolateOneStep_Stereo(sample_t* pSrc, int& i, float& effective_volume, float& pitch, biquad_param_t& bq_base, biquad_param_t& bq_main) { |
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166 |
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inline void InterpolateMono(sample_t* pSrc, int& i) { |
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InterpolateOneStep_Mono(pSrc, i, |
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pEngine->pSynthesisParameters[Event::destination_vca][i] * PanLeft, |
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pEngine->pSynthesisParameters[Event::destination_vca][i] * PanRight, |
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pEngine->pSynthesisParameters[Event::destination_vco][i], |
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pEngine->pBasicFilterParameters[i], |
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pEngine->pMainFilterParameters[i]); |
173 |
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} |
174 |
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175 |
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inline void InterpolateStereo(sample_t* pSrc, int& i) { |
176 |
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InterpolateOneStep_Stereo(pSrc, i, |
177 |
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pEngine->pSynthesisParameters[Event::destination_vca][i] * PanLeft, |
178 |
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pEngine->pSynthesisParameters[Event::destination_vca][i] * PanRight, |
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pEngine->pSynthesisParameters[Event::destination_vco][i], |
180 |
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pEngine->pBasicFilterParameters[i], |
181 |
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pEngine->pMainFilterParameters[i]); |
182 |
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} |
183 |
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184 |
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inline void InterpolateOneStep_Stereo(sample_t* pSrc, int& i, float volume_left, float volume_right, float& pitch, biquad_param_t& bq_base, biquad_param_t& bq_main) { |
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int pos_int = RTMath::DoubleToInt(this->Pos); // integer position |
int pos_int = RTMath::DoubleToInt(this->Pos); // integer position |
186 |
float pos_fract = this->Pos - pos_int; // fractional part of position |
float pos_fract = this->Pos - pos_int; // fractional part of position |
187 |
pos_int <<= 1; |
pos_int <<= 1; |
189 |
#if USE_LINEAR_INTERPOLATION |
#if USE_LINEAR_INTERPOLATION |
190 |
#if ENABLE_FILTER |
#if ENABLE_FILTER |
191 |
// left channel |
// left channel |
192 |
pEngine->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, volume_left * (pSrc[pos_int] + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int]))); |
193 |
// right channel |
// right channel |
194 |
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]))); |
pEngine->pOutputRight[i++] += this->FilterRight.Apply(&bq_base, &bq_main, volume_right * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1]))); |
195 |
#else // no filter |
#else // no filter |
196 |
// left channel |
// left channel |
197 |
pEngine->pOutputLeft[i] += effective_volume * (pSrc[pos_int] + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int])); |
pEngine->pOutputLeft[i] += volume_left * (pSrc[pos_int] + pos_fract * (pSrc[pos_int+2] - pSrc[pos_int])); |
198 |
// right channel |
// right channel |
199 |
pEngine->pOutputRight[i++] += effective_volume * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1])); |
pEngine->pOutputRight[i++] += volume_right * (pSrc[pos_int+1] + pos_fract * (pSrc[pos_int+3] - pSrc[pos_int+1])); |
200 |
#endif // ENABLE_FILTER |
#endif // ENABLE_FILTER |
201 |
#else // polynomial interpolation |
#else // polynomial interpolation |
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// calculate left channel |
// calculate left channel |
208 |
float b = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f; |
float b = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f; |
209 |
float c = (x1 - xm1) * 0.5f; |
float c = (x1 - xm1) * 0.5f; |
210 |
#if ENABLE_FILTER |
#if ENABLE_FILTER |
211 |
pEngine->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, volume_left * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0)); |
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#else // no filter |
#else // no filter |
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pEngine->pOutputLeft[i] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0); |
pEngine->pOutputLeft[i] += volume_left * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0); |
214 |
#endif // ENABLE_FILTER |
#endif // ENABLE_FILTER |
215 |
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216 |
//calculate right channel |
//calculate right channel |
222 |
b = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f; |
b = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f; |
223 |
c = (x1 - xm1) * 0.5f; |
c = (x1 - xm1) * 0.5f; |
224 |
#if ENABLE_FILTER |
#if ENABLE_FILTER |
225 |
pEngine->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, volume_right * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0)); |
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#else // no filter |
#else // no filter |
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pEngine->pOutputRight[i++] += effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0); |
pEngine->pOutputRight[i++] += volume_right * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0); |
228 |
#endif // ENABLE_FILTER |
#endif // ENABLE_FILTER |
229 |
#endif // USE_LINEAR_INTERPOLATION |
#endif // USE_LINEAR_INTERPOLATION |
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231 |
this->Pos += pitch; |
this->Pos += pitch; |
232 |
} |
} |
233 |
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234 |
inline void InterpolateOneStep_Mono(sample_t* pSrc, int& i, float& effective_volume, float& pitch, biquad_param_t& bq_base, biquad_param_t& bq_main) { |
inline void InterpolateOneStep_Mono(sample_t* pSrc, int& i, float volume_left, float volume_right, float& pitch, biquad_param_t& bq_base, biquad_param_t& bq_main) { |
235 |
int pos_int = RTMath::DoubleToInt(this->Pos); // integer position |
int pos_int = RTMath::DoubleToInt(this->Pos); // integer position |
236 |
float pos_fract = this->Pos - pos_int; // fractional part of position |
float pos_fract = this->Pos - pos_int; // fractional part of position |
237 |
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238 |
#if USE_LINEAR_INTERPOLATION |
#if USE_LINEAR_INTERPOLATION |
239 |
float sample_point = effective_volume * (pSrc[pos_int] + pos_fract * (pSrc[pos_int+1] - pSrc[pos_int])); |
float sample_point = pSrc[pos_int] + pos_fract * (pSrc[pos_int+1] - pSrc[pos_int]); |
240 |
#else // polynomial interpolation |
#else // polynomial interpolation |
241 |
float xm1 = pSrc[pos_int]; |
float xm1 = pSrc[pos_int]; |
242 |
float x0 = pSrc[pos_int+1]; |
float x0 = pSrc[pos_int+1]; |
245 |
float a = (3.0f * (x0 - x1) - xm1 + x2) * 0.5f; |
float a = (3.0f * (x0 - x1) - xm1 + x2) * 0.5f; |
246 |
float b = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f; |
float b = 2.0f * x1 + xm1 - (5.0f * x0 + x2) * 0.5f; |
247 |
float c = (x1 - xm1) * 0.5f; |
float c = (x1 - xm1) * 0.5f; |
248 |
float sample_point = effective_volume * ((((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0); |
float sample_point = (((a * pos_fract) + b) * pos_fract + c) * pos_fract + x0; |
249 |
#endif // USE_LINEAR_INTERPOLATION |
#endif // USE_LINEAR_INTERPOLATION |
250 |
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251 |
#if ENABLE_FILTER |
#if ENABLE_FILTER |
252 |
sample_point = this->FilterLeft.Apply(&bq_base, &bq_main, sample_point); |
sample_point = this->FilterLeft.Apply(&bq_base, &bq_main, sample_point); |
253 |
#endif // ENABLE_FILTER |
#endif // ENABLE_FILTER |
254 |
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255 |
pEngine->pOutputLeft[i] += sample_point; |
pEngine->pOutputLeft[i] += sample_point * volume_left; |
256 |
pEngine->pOutputRight[i++] += sample_point; |
pEngine->pOutputRight[i++] += sample_point * volume_right; |
257 |
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258 |
this->Pos += pitch; |
this->Pos += pitch; |
259 |
} |
} |