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comparison: media/libsoundtouch/src/mmx_optimized.cpp

media/libsoundtouch/src/mmx_optimized.cpp

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1 ////////////////////////////////////////////////////////////////////////////////
2 ///
3 /// MMX optimized routines. All MMX optimized functions have been gathered into
4 /// this single source code file, regardless to their class or original source
5 /// code file, in order to ease porting the library to other compiler and
6 /// processor platforms.
7 ///
8 /// The MMX-optimizations are programmed using MMX compiler intrinsics that
9 /// are supported both by Microsoft Visual C++ and GCC compilers, so this file
10 /// should compile with both toolsets.
11 ///
12 /// NOTICE: If using Visual Studio 6.0, you'll need to install the "Visual C++
13 /// 6.0 processor pack" update to support compiler intrinsic syntax. The update
14 /// is available for download at Microsoft Developers Network, see here:
15 /// http://msdn.microsoft.com/en-us/vstudio/aa718349.aspx
16 ///
17 /// Author : Copyright (c) Olli Parviainen
18 /// Author e-mail : oparviai 'at' iki.fi
19 /// SoundTouch WWW: http://www.surina.net/soundtouch
20 ///
21 ////////////////////////////////////////////////////////////////////////////////
22 //
23 // Last changed : $Date: 2014-01-07 12:25:40 -0600 (Tue, 07 Jan 2014) $
24 // File revision : $Revision: 4 $
25 //
26 // $Id: mmx_optimized.cpp 184 2014-01-07 18:25:40Z oparviai $
27 //
28 ////////////////////////////////////////////////////////////////////////////////
29 //
30 // License :
31 //
32 // SoundTouch audio processing library
33 // Copyright (c) Olli Parviainen
34 //
35 // This library is free software; you can redistribute it and/or
36 // modify it under the terms of the GNU Lesser General Public
37 // License as published by the Free Software Foundation; either
38 // version 2.1 of the License, or (at your option) any later version.
39 //
40 // This library is distributed in the hope that it will be useful,
41 // but WITHOUT ANY WARRANTY; without even the implied warranty of
42 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
43 // Lesser General Public License for more details.
44 //
45 // You should have received a copy of the GNU Lesser General Public
46 // License along with this library; if not, write to the Free Software
47 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
48 //
49 ////////////////////////////////////////////////////////////////////////////////
50
51 #include "STTypes.h"
52
53 #ifdef SOUNDTOUCH_ALLOW_MMX
54 // MMX routines available only with integer sample type
55
56 using namespace soundtouch;
57
58 //////////////////////////////////////////////////////////////////////////////
59 //
60 // implementation of MMX optimized functions of class 'TDStretchMMX'
61 //
62 //////////////////////////////////////////////////////////////////////////////
63
64 #include "TDStretch.h"
65 #include <mmintrin.h>
66 #include <limits.h>
67 #include <math.h>
68
69
70 // Calculates cross correlation of two buffers
71 double TDStretchMMX::calcCrossCorr(const short *pV1, const short *pV2, double &dnorm) const
72 {
73 const __m64 *pVec1, *pVec2;
74 __m64 shifter;
75 __m64 accu, normaccu;
76 long corr, norm;
77 int i;
78
79 pVec1 = (__m64*)pV1;
80 pVec2 = (__m64*)pV2;
81
82 shifter = _m_from_int(overlapDividerBits);
83 normaccu = accu = _mm_setzero_si64();
84
85 // Process 4 parallel sets of 2 * stereo samples or 4 * mono samples
86 // during each round for improved CPU-level parallellization.
87 for (i = 0; i < channels * overlapLength / 16; i ++)
88 {
89 __m64 temp, temp2;
90
91 // dictionary of instructions:
92 // _m_pmaddwd : 4*16bit multiply-add, resulting two 32bits = [a0*b0+a1*b1 ; a2*b2+a3*b3]
93 // _mm_add_pi32 : 2*32bit add
94 // _m_psrad : 32bit right-shift
95
96 temp = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[0], pVec2[0]), shifter),
97 _mm_sra_pi32(_mm_madd_pi16(pVec1[1], pVec2[1]), shifter));
98 temp2 = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[0], pVec1[0]), shifter),
99 _mm_sra_pi32(_mm_madd_pi16(pVec1[1], pVec1[1]), shifter));
100 accu = _mm_add_pi32(accu, temp);
101 normaccu = _mm_add_pi32(normaccu, temp2);
102
103 temp = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[2], pVec2[2]), shifter),
104 _mm_sra_pi32(_mm_madd_pi16(pVec1[3], pVec2[3]), shifter));
105 temp2 = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[2], pVec1[2]), shifter),
106 _mm_sra_pi32(_mm_madd_pi16(pVec1[3], pVec1[3]), shifter));
107 accu = _mm_add_pi32(accu, temp);
108 normaccu = _mm_add_pi32(normaccu, temp2);
109
110 pVec1 += 4;
111 pVec2 += 4;
112 }
113
114 // copy hi-dword of mm0 to lo-dword of mm1, then sum mmo+mm1
115 // and finally store the result into the variable "corr"
116
117 accu = _mm_add_pi32(accu, _mm_srli_si64(accu, 32));
118 corr = _m_to_int(accu);
119
120 normaccu = _mm_add_pi32(normaccu, _mm_srli_si64(normaccu, 32));
121 norm = _m_to_int(normaccu);
122
123 // Clear MMS state
124 _m_empty();
125
126 // Normalize result by dividing by sqrt(norm) - this step is easiest
127 // done using floating point operation
128 dnorm = (double)norm;
129
130 return (double)corr / sqrt(dnorm < 1e-9 ? 1.0 : dnorm);
131 // Note: Warning about the missing EMMS instruction is harmless
132 // as it'll be called elsewhere.
133 }
134
135
136 /// Update cross-correlation by accumulating "norm" coefficient by previously calculated value
137 double TDStretchMMX::calcCrossCorrAccumulate(const short *pV1, const short *pV2, double &dnorm) const
138 {
139 const __m64 *pVec1, *pVec2;
140 __m64 shifter;
141 __m64 accu;
142 long corr, lnorm;
143 int i;
144
145 // cancel first normalizer tap from previous round
146 lnorm = 0;
147 for (i = 1; i <= channels; i ++)
148 {
149 lnorm -= (pV1[-i] * pV1[-i]) >> overlapDividerBits;
150 }
151
152 pVec1 = (__m64*)pV1;
153 pVec2 = (__m64*)pV2;
154
155 shifter = _m_from_int(overlapDividerBits);
156 accu = _mm_setzero_si64();
157
158 // Process 4 parallel sets of 2 * stereo samples or 4 * mono samples
159 // during each round for improved CPU-level parallellization.
160 for (i = 0; i < channels * overlapLength / 16; i ++)
161 {
162 __m64 temp;
163
164 // dictionary of instructions:
165 // _m_pmaddwd : 4*16bit multiply-add, resulting two 32bits = [a0*b0+a1*b1 ; a2*b2+a3*b3]
166 // _mm_add_pi32 : 2*32bit add
167 // _m_psrad : 32bit right-shift
168
169 temp = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[0], pVec2[0]), shifter),
170 _mm_sra_pi32(_mm_madd_pi16(pVec1[1], pVec2[1]), shifter));
171 accu = _mm_add_pi32(accu, temp);
172
173 temp = _mm_add_pi32(_mm_sra_pi32(_mm_madd_pi16(pVec1[2], pVec2[2]), shifter),
174 _mm_sra_pi32(_mm_madd_pi16(pVec1[3], pVec2[3]), shifter));
175 accu = _mm_add_pi32(accu, temp);
176
177 pVec1 += 4;
178 pVec2 += 4;
179 }
180
181 // copy hi-dword of mm0 to lo-dword of mm1, then sum mmo+mm1
182 // and finally store the result into the variable "corr"
183
184 accu = _mm_add_pi32(accu, _mm_srli_si64(accu, 32));
185 corr = _m_to_int(accu);
186
187 // Clear MMS state
188 _m_empty();
189
190 // update normalizer with last samples of this round
191 pV1 = (short *)pVec1;
192 for (int j = 1; j <= channels; j ++)
193 {
194 lnorm += (pV1[-j] * pV1[-j]) >> overlapDividerBits;
195 }
196 dnorm += (double)lnorm;
197
198 // Normalize result by dividing by sqrt(norm) - this step is easiest
199 // done using floating point operation
200 return (double)corr / sqrt((dnorm < 1e-9) ? 1.0 : dnorm);
201 }
202
203
204 void TDStretchMMX::clearCrossCorrState()
205 {
206 // Clear MMS state
207 _m_empty();
208 //_asm EMMS;
209 }
210
211
212
213 // MMX-optimized version of the function overlapStereo
214 void TDStretchMMX::overlapStereo(short *output, const short *input) const
215 {
216 const __m64 *pVinput, *pVMidBuf;
217 __m64 *pVdest;
218 __m64 mix1, mix2, adder, shifter;
219 int i;
220
221 pVinput = (const __m64*)input;
222 pVMidBuf = (const __m64*)pMidBuffer;
223 pVdest = (__m64*)output;
224
225 // mix1 = mixer values for 1st stereo sample
226 // mix1 = mixer values for 2nd stereo sample
227 // adder = adder for updating mixer values after each round
228
229 mix1 = _mm_set_pi16(0, overlapLength, 0, overlapLength);
230 adder = _mm_set_pi16(1, -1, 1, -1);
231 mix2 = _mm_add_pi16(mix1, adder);
232 adder = _mm_add_pi16(adder, adder);
233
234 // Overlaplength-division by shifter. "+1" is to account for "-1" deduced in
235 // overlapDividerBits calculation earlier.
236 shifter = _m_from_int(overlapDividerBits + 1);
237
238 for (i = 0; i < overlapLength / 4; i ++)
239 {
240 __m64 temp1, temp2;
241
242 // load & shuffle data so that input & mixbuffer data samples are paired
243 temp1 = _mm_unpacklo_pi16(pVMidBuf[0], pVinput[0]); // = i0l m0l i0r m0r
244 temp2 = _mm_unpackhi_pi16(pVMidBuf[0], pVinput[0]); // = i1l m1l i1r m1r
245
246 // temp = (temp .* mix) >> shifter
247 temp1 = _mm_sra_pi32(_mm_madd_pi16(temp1, mix1), shifter);
248 temp2 = _mm_sra_pi32(_mm_madd_pi16(temp2, mix2), shifter);
249 pVdest[0] = _mm_packs_pi32(temp1, temp2); // pack 2*2*32bit => 4*16bit
250
251 // update mix += adder
252 mix1 = _mm_add_pi16(mix1, adder);
253 mix2 = _mm_add_pi16(mix2, adder);
254
255 // --- second round begins here ---
256
257 // load & shuffle data so that input & mixbuffer data samples are paired
258 temp1 = _mm_unpacklo_pi16(pVMidBuf[1], pVinput[1]); // = i2l m2l i2r m2r
259 temp2 = _mm_unpackhi_pi16(pVMidBuf[1], pVinput[1]); // = i3l m3l i3r m3r
260
261 // temp = (temp .* mix) >> shifter
262 temp1 = _mm_sra_pi32(_mm_madd_pi16(temp1, mix1), shifter);
263 temp2 = _mm_sra_pi32(_mm_madd_pi16(temp2, mix2), shifter);
264 pVdest[1] = _mm_packs_pi32(temp1, temp2); // pack 2*2*32bit => 4*16bit
265
266 // update mix += adder
267 mix1 = _mm_add_pi16(mix1, adder);
268 mix2 = _mm_add_pi16(mix2, adder);
269
270 pVinput += 2;
271 pVMidBuf += 2;
272 pVdest += 2;
273 }
274
275 _m_empty(); // clear MMS state
276 }
277
278
279 //////////////////////////////////////////////////////////////////////////////
280 //
281 // implementation of MMX optimized functions of class 'FIRFilter'
282 //
283 //////////////////////////////////////////////////////////////////////////////
284
285 #include "FIRFilter.h"
286
287
288 FIRFilterMMX::FIRFilterMMX() : FIRFilter()
289 {
290 filterCoeffsUnalign = NULL;
291 }
292
293
294 FIRFilterMMX::~FIRFilterMMX()
295 {
296 delete[] filterCoeffsUnalign;
297 }
298
299
300 // (overloaded) Calculates filter coefficients for MMX routine
301 void FIRFilterMMX::setCoefficients(const short *coeffs, uint newLength, uint uResultDivFactor)
302 {
303 uint i;
304 FIRFilter::setCoefficients(coeffs, newLength, uResultDivFactor);
305
306 // Ensure that filter coeffs array is aligned to 16-byte boundary
307 delete[] filterCoeffsUnalign;
308 filterCoeffsUnalign = new short[2 * newLength + 8];
309 filterCoeffsAlign = (short *)SOUNDTOUCH_ALIGN_POINTER_16(filterCoeffsUnalign);
310
311 // rearrange the filter coefficients for mmx routines
312 for (i = 0;i < length; i += 4)
313 {
314 filterCoeffsAlign[2 * i + 0] = coeffs[i + 0];
315 filterCoeffsAlign[2 * i + 1] = coeffs[i + 2];
316 filterCoeffsAlign[2 * i + 2] = coeffs[i + 0];
317 filterCoeffsAlign[2 * i + 3] = coeffs[i + 2];
318
319 filterCoeffsAlign[2 * i + 4] = coeffs[i + 1];
320 filterCoeffsAlign[2 * i + 5] = coeffs[i + 3];
321 filterCoeffsAlign[2 * i + 6] = coeffs[i + 1];
322 filterCoeffsAlign[2 * i + 7] = coeffs[i + 3];
323 }
324 }
325
326
327
328 // mmx-optimized version of the filter routine for stereo sound
329 uint FIRFilterMMX::evaluateFilterStereo(short *dest, const short *src, uint numSamples) const
330 {
331 // Create stack copies of the needed member variables for asm routines :
332 uint i, j;
333 __m64 *pVdest = (__m64*)dest;
334
335 if (length < 2) return 0;
336
337 for (i = 0; i < (numSamples - length) / 2; i ++)
338 {
339 __m64 accu1;
340 __m64 accu2;
341 const __m64 *pVsrc = (const __m64*)src;
342 const __m64 *pVfilter = (const __m64*)filterCoeffsAlign;
343
344 accu1 = accu2 = _mm_setzero_si64();
345 for (j = 0; j < lengthDiv8 * 2; j ++)
346 {
347 __m64 temp1, temp2;
348
349 temp1 = _mm_unpacklo_pi16(pVsrc[0], pVsrc[1]); // = l2 l0 r2 r0
350 temp2 = _mm_unpackhi_pi16(pVsrc[0], pVsrc[1]); // = l3 l1 r3 r1
351
352 accu1 = _mm_add_pi32(accu1, _mm_madd_pi16(temp1, pVfilter[0])); // += l2*f2+l0*f0 r2*f2+r0*f0
353 accu1 = _mm_add_pi32(accu1, _mm_madd_pi16(temp2, pVfilter[1])); // += l3*f3+l1*f1 r3*f3+r1*f1
354
355 temp1 = _mm_unpacklo_pi16(pVsrc[1], pVsrc[2]); // = l4 l2 r4 r2
356
357 accu2 = _mm_add_pi32(accu2, _mm_madd_pi16(temp2, pVfilter[0])); // += l3*f2+l1*f0 r3*f2+r1*f0
358 accu2 = _mm_add_pi32(accu2, _mm_madd_pi16(temp1, pVfilter[1])); // += l4*f3+l2*f1 r4*f3+r2*f1
359
360 // accu1 += l2*f2+l0*f0 r2*f2+r0*f0
361 // += l3*f3+l1*f1 r3*f3+r1*f1
362
363 // accu2 += l3*f2+l1*f0 r3*f2+r1*f0
364 // l4*f3+l2*f1 r4*f3+r2*f1
365
366 pVfilter += 2;
367 pVsrc += 2;
368 }
369 // accu >>= resultDivFactor
370 accu1 = _mm_srai_pi32(accu1, resultDivFactor);
371 accu2 = _mm_srai_pi32(accu2, resultDivFactor);
372
373 // pack 2*2*32bits => 4*16 bits
374 pVdest[0] = _mm_packs_pi32(accu1, accu2);
375 src += 4;
376 pVdest ++;
377 }
378
379 _m_empty(); // clear emms state
380
381 return (numSamples & 0xfffffffe) - length;
382 }
383
384 #endif // SOUNDTOUCH_ALLOW_MMX

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