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* LinuxSampler - modular, streaming capable sampler * |
* LinuxSampler - modular, streaming capable sampler * |
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* * |
* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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|
* Copyright (C) 2005, 2006 Christian Schoenebeck * |
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* * |
* * |
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* This program is free software; you can redistribute it and/or modify * |
* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
* it under the terms of the GNU General Public License as published by * |
36 |
ASM_X86_MMX_SSE |
ASM_X86_MMX_SSE |
37 |
}; |
}; |
38 |
|
|
39 |
|
/** @brief Real Time Math Base Class |
40 |
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* |
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|
* Math functions for real time operation. This base class contains all |
42 |
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* non-template methods. |
43 |
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*/ |
44 |
class RTMathBase { |
class RTMathBase { |
45 |
public: |
public: |
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/** |
/** |
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* (assuming equal tempered scale of course, divided into 12 |
* (assuming equal tempered scale of course, divided into 12 |
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* semitones per octave and 100 cents per semitone). |
* semitones per octave and 100 cents per semitone). |
63 |
* |
* |
64 |
* Note: MAX_PITCH (defined in global.h) has to be defined to an |
* Note: CONFIG_MAX_PITCH (defined in config.h) has to be defined to an |
65 |
* appropriate value, otherwise the behavior of this function is |
* appropriate value, otherwise the behavior of this function is |
66 |
* undefined, but most probably if MAX_PITCH is too small, the |
* undefined, but most probably if CONFIG_MAX_PITCH is too small, the |
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* application will crash due to segmentation fault here. |
* application will crash due to segmentation fault here. |
68 |
* |
* |
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* @param cents - pitch value in cents (+1200 cents means +1 octave) |
* @param cents - pitch value in cents (+1200 cents means +1 octave) |
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return pCentsToFreqTable[index_int] + index_fract * (pCentsToFreqTable[index_int+1] - pCentsToFreqTable[index_int]); |
return pCentsToFreqTable[index_int] + index_fract * (pCentsToFreqTable[index_int+1] - pCentsToFreqTable[index_int]); |
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} |
} |
77 |
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|
78 |
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/** |
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* Inverse function to CentsToFreqRatio(). This function is a bit |
80 |
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* slow, so it should not be called too frequently. |
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*/ |
82 |
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static double FreqRatioToCents(double FreqRatio) { |
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return log(FreqRatio) / log(TWELVEHUNDREDTH_ROOT_OF_TWO); |
84 |
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} |
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|
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private: |
private: |
87 |
static float CentsToFreqTable[MAX_PITCH * 1200 * 2 + 1]; |
static float CentsToFreqTable[CONFIG_MAX_PITCH * 1200 * 2 + 1]; |
88 |
static float* pCentsToFreqTable; |
static float* pCentsToFreqTable; |
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|
|
90 |
static float* InitCentsToFreqTable(); |
static float* InitCentsToFreqTable(); |
91 |
}; |
}; |
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|
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/** Real Time Math |
/** @brief Real Time Math |
94 |
* |
* |
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* Math functions for real time operation. |
* This is a template which provides customized methods for the desired low |
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* level implementation. The ASM_X86_MMX_SSE implementation of each method |
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* for example doesn't use 387 FPU instruction. This is needed for MMX |
98 |
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* algorithms which do not allow mixed MMX and 387 instructions. |
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*/ |
*/ |
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template<implementation_t IMPL = CPP> |
template<implementation_t IMPL = CPP> |
101 |
class __RTMath : public RTMathBase { |
class __RTMath : public RTMathBase { |
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// conversion using truncate |
// conversion using truncate |
104 |
inline static int Int(const float a) { |
inline static int Int(const float a) { |
105 |
switch (IMPL) { |
switch (IMPL) { |
106 |
case CPP: { |
#if CONFIG_ASM && ARCH_X86 |
|
return (int) a; |
|
|
} |
|
|
#if ARCH_X86 |
|
107 |
case ASM_X86_MMX_SSE: { |
case ASM_X86_MMX_SSE: { |
108 |
int ret; |
int ret; |
109 |
asm ( |
asm ( |
113 |
); |
); |
114 |
return ret; |
return ret; |
115 |
} |
} |
116 |
#endif // ARCH_X86 |
#endif // CONFIG_ASM && ARCH_X86 |
117 |
|
default: { |
118 |
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return (int) a; |
119 |
|
} |
120 |
} |
} |
121 |
} |
} |
122 |
|
|
127 |
|
|
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inline static float Float(const int a) { |
inline static float Float(const int a) { |
129 |
switch (IMPL) { |
switch (IMPL) { |
130 |
case CPP: { |
#if CONFIG_ASM && ARCH_X86 |
|
return (float) a; |
|
|
} |
|
|
#if ARCH_X86 |
|
131 |
case ASM_X86_MMX_SSE: { |
case ASM_X86_MMX_SSE: { |
132 |
float ret; |
float ret; |
133 |
asm ( |
asm ( |
138 |
); |
); |
139 |
return ret; |
return ret; |
140 |
} |
} |
141 |
#endif // ARCH_X86 |
#endif // CONFIG_ASM && ARCH_X86 |
142 |
|
default: { |
143 |
|
return (float) a; |
144 |
|
} |
145 |
} |
} |
146 |
} |
} |
147 |
|
|
154 |
|
|
155 |
inline static float Sum(const float& a, const float& b) { |
inline static float Sum(const float& a, const float& b) { |
156 |
switch (IMPL) { |
switch (IMPL) { |
157 |
case CPP: { |
#if CONFIG_ASM && ARCH_X86 |
|
return (a + b); |
|
|
} |
|
|
#if ARCH_X86 |
|
158 |
case ASM_X86_MMX_SSE: { |
case ASM_X86_MMX_SSE: { |
159 |
float ret; |
float ret; |
160 |
asm ( |
asm ( |
166 |
); |
); |
167 |
return ret; |
return ret; |
168 |
} |
} |
169 |
#endif // ARCH_X86 |
#endif // CONFIG_ASM && ARCH_X86 |
170 |
|
default: { |
171 |
|
return (a + b); |
172 |
|
} |
173 |
} |
} |
174 |
} |
} |
175 |
|
|
179 |
|
|
180 |
inline static float Sub(const float& a, const float& b) { |
inline static float Sub(const float& a, const float& b) { |
181 |
switch (IMPL) { |
switch (IMPL) { |
182 |
case CPP: { |
#if CONFIG_ASM && ARCH_X86 |
|
return (a - b); |
|
|
} |
|
|
#if ARCH_X86 |
|
183 |
case ASM_X86_MMX_SSE: { |
case ASM_X86_MMX_SSE: { |
184 |
float ret; |
float ret; |
185 |
asm ( |
asm ( |
191 |
); |
); |
192 |
return ret; |
return ret; |
193 |
} |
} |
194 |
#endif // ARCH_X86 |
#endif // CONFIG_ASM && ARCH_X86 |
195 |
|
default: { |
196 |
|
return (a - b); |
197 |
|
} |
198 |
} |
} |
199 |
} |
} |
200 |
|
|
204 |
|
|
205 |
inline static float Mul(const float a, const float b) { |
inline static float Mul(const float a, const float b) { |
206 |
switch (IMPL) { |
switch (IMPL) { |
207 |
case CPP: { |
#if CONFIG_ASM && ARCH_X86 |
|
return (a * b); |
|
|
} |
|
|
#if ARCH_X86 |
|
208 |
case ASM_X86_MMX_SSE: { |
case ASM_X86_MMX_SSE: { |
209 |
float ret; |
float ret; |
210 |
asm ( |
asm ( |
216 |
); |
); |
217 |
return ret; |
return ret; |
218 |
} |
} |
219 |
#endif // ARCH_X86 |
#endif // CONFIG_ASM && ARCH_X86 |
220 |
|
default: { |
221 |
|
return (a * b); |
222 |
|
} |
223 |
} |
} |
224 |
} |
} |
225 |
|
|
229 |
|
|
230 |
inline static float Div(const float a, const float b) { |
inline static float Div(const float a, const float b) { |
231 |
switch (IMPL) { |
switch (IMPL) { |
232 |
case CPP: { |
#if CONFIG_ASM && ARCH_X86 |
|
return (a / b); |
|
|
} |
|
|
#if ARCH_X86 |
|
233 |
case ASM_X86_MMX_SSE: { |
case ASM_X86_MMX_SSE: { |
234 |
float ret; |
float ret; |
235 |
asm ( |
asm ( |
241 |
); |
); |
242 |
return ret; |
return ret; |
243 |
} |
} |
244 |
#endif // ARCH_X86 |
#endif // CONFIG_ASM && ARCH_X86 |
245 |
|
default: { |
246 |
|
return (a / b); |
247 |
|
} |
248 |
} |
} |
249 |
} |
} |
250 |
|
|
254 |
|
|
255 |
inline static float Min(const float a, const float b) { |
inline static float Min(const float a, const float b) { |
256 |
switch (IMPL) { |
switch (IMPL) { |
257 |
case CPP: { |
#if CONFIG_ASM && ARCH_X86 |
|
return (b < a) ? b : a; |
|
|
} |
|
|
#if ARCH_X86 |
|
258 |
case ASM_X86_MMX_SSE: { |
case ASM_X86_MMX_SSE: { |
259 |
float ret; |
float ret; |
260 |
asm ( |
asm ( |
266 |
); |
); |
267 |
return ret; |
return ret; |
268 |
} |
} |
269 |
#endif // ARCH_X86 |
#endif // CONFIG_ASM && ARCH_X86 |
270 |
|
default: { |
271 |
|
return std::min(a, b); |
272 |
|
} |
273 |
} |
} |
274 |
} |
} |
275 |
|
|
279 |
|
|
280 |
inline static float Max(const float a, const float b) { |
inline static float Max(const float a, const float b) { |
281 |
switch (IMPL) { |
switch (IMPL) { |
282 |
case CPP: { |
#if CONFIG_ASM && ARCH_X86 |
|
return (b > a) ? b : a; |
|
|
} |
|
|
#if ARCH_X86 |
|
283 |
case ASM_X86_MMX_SSE: { |
case ASM_X86_MMX_SSE: { |
284 |
float ret; |
float ret; |
285 |
asm ( |
asm ( |
291 |
); |
); |
292 |
return ret; |
return ret; |
293 |
} |
} |
294 |
#endif // ARCH_X86 |
#endif // CONFIG_ASM && ARCH_X86 |
295 |
|
default: { |
296 |
|
return std::max(a, b); |
297 |
|
} |
298 |
} |
} |
299 |
} |
} |
300 |
|
|
304 |
|
|
305 |
inline static float Fmodf(const float &a, const float &b) { |
inline static float Fmodf(const float &a, const float &b) { |
306 |
switch (IMPL) { |
switch (IMPL) { |
307 |
case CPP: { |
#if CONFIG_ASM && ARCH_X86 |
|
return fmodf(a, b); |
|
|
} |
|
|
#if ARCH_X86 |
|
308 |
case ASM_X86_MMX_SSE: { |
case ASM_X86_MMX_SSE: { |
309 |
float ret; |
float ret; |
310 |
asm ( |
asm ( |
323 |
); |
); |
324 |
return ret; |
return ret; |
325 |
} |
} |
326 |
#endif // ARCH_X86 |
#endif // CONFIG_ASM && ARCH_X86 |
327 |
|
default: { |
328 |
|
return fmodf(a, b); |
329 |
|
} |
330 |
} |
} |
331 |
} |
} |
332 |
}; |
}; |