aacdec_mips.c
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1 /*
2  * Copyright (c) 2012
3  * MIPS Technologies, Inc., California.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
14  * contributors may be used to endorse or promote products derived from
15  * this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * Authors: Darko Laus (darko@mips.com)
30  * Djordje Pesut (djordje@mips.com)
31  * Mirjana Vulin (mvulin@mips.com)
32  *
33  * This file is part of FFmpeg.
34  *
35  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
47  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
48  */
49 
50 /**
51  * @file
52  * Reference: libavcodec/aacdec.c
53  */
54 
55 #include "libavcodec/aac.h"
56 #include "aacdec_mips.h"
57 #include "libavcodec/aactab.h"
58 #include "libavcodec/sinewin.h"
59 
60 #if HAVE_INLINE_ASM
61 static av_always_inline int lcg_random(unsigned previous_val)
62 {
63  union { unsigned u; int s; } v = { previous_val * 1664525u + 1013904223 };
64  return v.s;
65 }
66 
67 static void imdct_and_windowing_mips(AACContext *ac, SingleChannelElement *sce)
68 {
69  IndividualChannelStream *ics = &sce->ics;
70  float *in = sce->coeffs;
71  float *out = sce->ret;
72  float *saved = sce->saved;
73  const float *swindow = ics->use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
74  const float *lwindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
75  const float *swindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
76  float *buf = ac->buf_mdct;
77  int i;
78 
79  if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
80  for (i = 0; i < 1024; i += 128)
81  ac->mdct_small.imdct_half(&ac->mdct_small, buf + i, in + i);
82  } else
83  ac->mdct.imdct_half(&ac->mdct, buf, in);
84 
85  /* window overlapping
86  * NOTE: To simplify the overlapping code, all 'meaningless' short to long
87  * and long to short transitions are considered to be short to short
88  * transitions. This leaves just two cases (long to long and short to short)
89  * with a little special sauce for EIGHT_SHORT_SEQUENCE.
90  */
91  if ((ics->window_sequence[1] == ONLY_LONG_SEQUENCE || ics->window_sequence[1] == LONG_STOP_SEQUENCE) &&
92  (ics->window_sequence[0] == ONLY_LONG_SEQUENCE || ics->window_sequence[0] == LONG_START_SEQUENCE)) {
93  ac->fdsp.vector_fmul_window( out, saved, buf, lwindow_prev, 512);
94  } else {
95  {
96  float *buf1 = saved;
97  float *buf2 = out;
98  int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
99  int loop_end;
100 
101  /* loop unrolled 8 times */
102  __asm__ volatile (
103  ".set push \n\t"
104  ".set noreorder \n\t"
105  "addiu %[loop_end], %[src], 1792 \n\t"
106  "1: \n\t"
107  "lw %[temp0], 0(%[src]) \n\t"
108  "lw %[temp1], 4(%[src]) \n\t"
109  "lw %[temp2], 8(%[src]) \n\t"
110  "lw %[temp3], 12(%[src]) \n\t"
111  "lw %[temp4], 16(%[src]) \n\t"
112  "lw %[temp5], 20(%[src]) \n\t"
113  "lw %[temp6], 24(%[src]) \n\t"
114  "lw %[temp7], 28(%[src]) \n\t"
115  "addiu %[src], %[src], 32 \n\t"
116  "sw %[temp0], 0(%[dst]) \n\t"
117  "sw %[temp1], 4(%[dst]) \n\t"
118  "sw %[temp2], 8(%[dst]) \n\t"
119  "sw %[temp3], 12(%[dst]) \n\t"
120  "sw %[temp4], 16(%[dst]) \n\t"
121  "sw %[temp5], 20(%[dst]) \n\t"
122  "sw %[temp6], 24(%[dst]) \n\t"
123  "sw %[temp7], 28(%[dst]) \n\t"
124  "bne %[src], %[loop_end], 1b \n\t"
125  " addiu %[dst], %[dst], 32 \n\t"
126  ".set pop \n\t"
127 
128  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
129  [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
130  [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
131  [temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
132  [loop_end]"=&r"(loop_end), [src]"+r"(buf1),
133  [dst]"+r"(buf2)
134  :
135  : "memory"
136  );
137  }
138 
139  if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
140  {
141  float wi;
142  float wj;
143  int i;
144  float temp0, temp1, temp2, temp3;
145  float *dst0 = out + 448 + 0*128;
146  float *dst1 = dst0 + 64 + 63;
147  float *dst2 = saved + 63;
148  float *win0 = (float*)swindow;
149  float *win1 = win0 + 64 + 63;
150  float *win0_prev = (float*)swindow_prev;
151  float *win1_prev = win0_prev + 64 + 63;
152  float *src0_prev = saved + 448;
153  float *src1_prev = buf + 0*128 + 63;
154  float *src0 = buf + 0*128 + 64;
155  float *src1 = buf + 1*128 + 63;
156 
157  for(i = 0; i < 64; i++)
158  {
159  temp0 = src0_prev[0];
160  temp1 = src1_prev[0];
161  wi = *win0_prev;
162  wj = *win1_prev;
163  temp2 = src0[0];
164  temp3 = src1[0];
165  dst0[0] = temp0 * wj - temp1 * wi;
166  dst1[0] = temp0 * wi + temp1 * wj;
167 
168  wi = *win0;
169  wj = *win1;
170 
171  temp0 = src0[128];
172  temp1 = src1[128];
173  dst0[128] = temp2 * wj - temp3 * wi;
174  dst1[128] = temp2 * wi + temp3 * wj;
175 
176  temp2 = src0[256];
177  temp3 = src1[256];
178  dst0[256] = temp0 * wj - temp1 * wi;
179  dst1[256] = temp0 * wi + temp1 * wj;
180  dst0[384] = temp2 * wj - temp3 * wi;
181  dst1[384] = temp2 * wi + temp3 * wj;
182 
183  temp0 = src0[384];
184  temp1 = src1[384];
185  dst0[512] = temp0 * wj - temp1 * wi;
186  dst2[0] = temp0 * wi + temp1 * wj;
187 
188  src0++;
189  src1--;
190  src0_prev++;
191  src1_prev--;
192  win0++;
193  win1--;
194  win0_prev++;
195  win1_prev--;
196  dst0++;
197  dst1--;
198  dst2--;
199  }
200  }
201  } else {
202  ac->fdsp.vector_fmul_window(out + 448, saved + 448, buf, swindow_prev, 64);
203  {
204  float *buf1 = buf + 64;
205  float *buf2 = out + 576;
206  int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
207  int loop_end;
208 
209  /* loop unrolled 8 times */
210  __asm__ volatile (
211  ".set push \n\t"
212  ".set noreorder \n\t"
213  "addiu %[loop_end], %[src], 1792 \n\t"
214  "1: \n\t"
215  "lw %[temp0], 0(%[src]) \n\t"
216  "lw %[temp1], 4(%[src]) \n\t"
217  "lw %[temp2], 8(%[src]) \n\t"
218  "lw %[temp3], 12(%[src]) \n\t"
219  "lw %[temp4], 16(%[src]) \n\t"
220  "lw %[temp5], 20(%[src]) \n\t"
221  "lw %[temp6], 24(%[src]) \n\t"
222  "lw %[temp7], 28(%[src]) \n\t"
223  "addiu %[src], %[src], 32 \n\t"
224  "sw %[temp0], 0(%[dst]) \n\t"
225  "sw %[temp1], 4(%[dst]) \n\t"
226  "sw %[temp2], 8(%[dst]) \n\t"
227  "sw %[temp3], 12(%[dst]) \n\t"
228  "sw %[temp4], 16(%[dst]) \n\t"
229  "sw %[temp5], 20(%[dst]) \n\t"
230  "sw %[temp6], 24(%[dst]) \n\t"
231  "sw %[temp7], 28(%[dst]) \n\t"
232  "bne %[src], %[loop_end], 1b \n\t"
233  " addiu %[dst], %[dst], 32 \n\t"
234  ".set pop \n\t"
235 
236  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
237  [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
238  [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
239  [temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
240  [loop_end]"=&r"(loop_end), [src]"+r"(buf1),
241  [dst]"+r"(buf2)
242  :
243  : "memory"
244  );
245  }
246  }
247  }
248 
249  // buffer update
250  if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
251  ac->fdsp.vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, swindow, 64);
252  ac->fdsp.vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, swindow, 64);
253  ac->fdsp.vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, swindow, 64);
254  {
255  float *buf1 = buf + 7*128 + 64;
256  float *buf2 = saved + 448;
257  int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
258  int loop_end;
259 
260  /* loop unrolled 8 times */
261  __asm__ volatile (
262  ".set push \n\t"
263  ".set noreorder \n\t"
264  "addiu %[loop_end], %[src], 256 \n\t"
265  "1: \n\t"
266  "lw %[temp0], 0(%[src]) \n\t"
267  "lw %[temp1], 4(%[src]) \n\t"
268  "lw %[temp2], 8(%[src]) \n\t"
269  "lw %[temp3], 12(%[src]) \n\t"
270  "lw %[temp4], 16(%[src]) \n\t"
271  "lw %[temp5], 20(%[src]) \n\t"
272  "lw %[temp6], 24(%[src]) \n\t"
273  "lw %[temp7], 28(%[src]) \n\t"
274  "addiu %[src], %[src], 32 \n\t"
275  "sw %[temp0], 0(%[dst]) \n\t"
276  "sw %[temp1], 4(%[dst]) \n\t"
277  "sw %[temp2], 8(%[dst]) \n\t"
278  "sw %[temp3], 12(%[dst]) \n\t"
279  "sw %[temp4], 16(%[dst]) \n\t"
280  "sw %[temp5], 20(%[dst]) \n\t"
281  "sw %[temp6], 24(%[dst]) \n\t"
282  "sw %[temp7], 28(%[dst]) \n\t"
283  "bne %[src], %[loop_end], 1b \n\t"
284  " addiu %[dst], %[dst], 32 \n\t"
285  ".set pop \n\t"
286 
287  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
288  [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
289  [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
290  [temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
291  [loop_end]"=&r"(loop_end), [src]"+r"(buf1),
292  [dst]"+r"(buf2)
293  :
294  : "memory"
295  );
296  }
297  } else if (ics->window_sequence[0] == LONG_START_SEQUENCE) {
298  float *buf1 = buf + 512;
299  float *buf2 = saved;
300  int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
301  int loop_end;
302 
303  /* loop unrolled 8 times */
304  __asm__ volatile (
305  ".set push \n\t"
306  ".set noreorder \n\t"
307  "addiu %[loop_end], %[src], 1792 \n\t"
308  "1: \n\t"
309  "lw %[temp0], 0(%[src]) \n\t"
310  "lw %[temp1], 4(%[src]) \n\t"
311  "lw %[temp2], 8(%[src]) \n\t"
312  "lw %[temp3], 12(%[src]) \n\t"
313  "lw %[temp4], 16(%[src]) \n\t"
314  "lw %[temp5], 20(%[src]) \n\t"
315  "lw %[temp6], 24(%[src]) \n\t"
316  "lw %[temp7], 28(%[src]) \n\t"
317  "addiu %[src], %[src], 32 \n\t"
318  "sw %[temp0], 0(%[dst]) \n\t"
319  "sw %[temp1], 4(%[dst]) \n\t"
320  "sw %[temp2], 8(%[dst]) \n\t"
321  "sw %[temp3], 12(%[dst]) \n\t"
322  "sw %[temp4], 16(%[dst]) \n\t"
323  "sw %[temp5], 20(%[dst]) \n\t"
324  "sw %[temp6], 24(%[dst]) \n\t"
325  "sw %[temp7], 28(%[dst]) \n\t"
326  "bne %[src], %[loop_end], 1b \n\t"
327  " addiu %[dst], %[dst], 32 \n\t"
328  ".set pop \n\t"
329 
330  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
331  [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
332  [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
333  [temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
334  [loop_end]"=&r"(loop_end), [src]"+r"(buf1),
335  [dst]"+r"(buf2)
336  :
337  : "memory"
338  );
339  {
340  float *buf1 = buf + 7*128 + 64;
341  float *buf2 = saved + 448;
342  int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
343  int loop_end;
344 
345  /* loop unrolled 8 times */
346  __asm__ volatile (
347  ".set push \n\t"
348  ".set noreorder \n\t"
349  "addiu %[loop_end], %[src], 256 \n\t"
350  "1: \n\t"
351  "lw %[temp0], 0(%[src]) \n\t"
352  "lw %[temp1], 4(%[src]) \n\t"
353  "lw %[temp2], 8(%[src]) \n\t"
354  "lw %[temp3], 12(%[src]) \n\t"
355  "lw %[temp4], 16(%[src]) \n\t"
356  "lw %[temp5], 20(%[src]) \n\t"
357  "lw %[temp6], 24(%[src]) \n\t"
358  "lw %[temp7], 28(%[src]) \n\t"
359  "addiu %[src], %[src], 32 \n\t"
360  "sw %[temp0], 0(%[dst]) \n\t"
361  "sw %[temp1], 4(%[dst]) \n\t"
362  "sw %[temp2], 8(%[dst]) \n\t"
363  "sw %[temp3], 12(%[dst]) \n\t"
364  "sw %[temp4], 16(%[dst]) \n\t"
365  "sw %[temp5], 20(%[dst]) \n\t"
366  "sw %[temp6], 24(%[dst]) \n\t"
367  "sw %[temp7], 28(%[dst]) \n\t"
368  "bne %[src], %[loop_end], 1b \n\t"
369  " addiu %[dst], %[dst], 32 \n\t"
370  ".set pop \n\t"
371 
372  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
373  [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
374  [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
375  [temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
376  [loop_end]"=&r"(loop_end), [src]"+r"(buf1),
377  [dst]"+r"(buf2)
378  :
379  : "memory"
380  );
381  }
382  } else { // LONG_STOP or ONLY_LONG
383  float *buf1 = buf + 512;
384  float *buf2 = saved;
385  int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
386  int loop_end;
387 
388  /* loop unrolled 8 times */
389  __asm__ volatile (
390  ".set push \n\t"
391  ".set noreorder \n\t"
392  "addiu %[loop_end], %[src], 2048 \n\t"
393  "1: \n\t"
394  "lw %[temp0], 0(%[src]) \n\t"
395  "lw %[temp1], 4(%[src]) \n\t"
396  "lw %[temp2], 8(%[src]) \n\t"
397  "lw %[temp3], 12(%[src]) \n\t"
398  "lw %[temp4], 16(%[src]) \n\t"
399  "lw %[temp5], 20(%[src]) \n\t"
400  "lw %[temp6], 24(%[src]) \n\t"
401  "lw %[temp7], 28(%[src]) \n\t"
402  "addiu %[src], %[src], 32 \n\t"
403  "sw %[temp0], 0(%[dst]) \n\t"
404  "sw %[temp1], 4(%[dst]) \n\t"
405  "sw %[temp2], 8(%[dst]) \n\t"
406  "sw %[temp3], 12(%[dst]) \n\t"
407  "sw %[temp4], 16(%[dst]) \n\t"
408  "sw %[temp5], 20(%[dst]) \n\t"
409  "sw %[temp6], 24(%[dst]) \n\t"
410  "sw %[temp7], 28(%[dst]) \n\t"
411  "bne %[src], %[loop_end], 1b \n\t"
412  " addiu %[dst], %[dst], 32 \n\t"
413  ".set pop \n\t"
414 
415  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
416  [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
417  [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
418  [temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
419  [loop_end]"=&r"(loop_end), [src]"+r"(buf1),
420  [dst]"+r"(buf2)
421  :
422  : "memory"
423  );
424  }
425 }
426 
427 static void apply_ltp_mips(AACContext *ac, SingleChannelElement *sce)
428 {
429  const LongTermPrediction *ltp = &sce->ics.ltp;
430  const uint16_t *offsets = sce->ics.swb_offset;
431  int i, sfb;
432  int j, k;
433 
434  if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE) {
435  float *predTime = sce->ret;
436  float *predFreq = ac->buf_mdct;
437  float *p_predTime;
438  int16_t num_samples = 2048;
439 
440  if (ltp->lag < 1024)
441  num_samples = ltp->lag + 1024;
442  j = (2048 - num_samples) >> 2;
443  k = (2048 - num_samples) & 3;
444  p_predTime = &predTime[num_samples];
445 
446  for (i = 0; i < num_samples; i++)
447  predTime[i] = sce->ltp_state[i + 2048 - ltp->lag] * ltp->coef;
448  for (i = 0; i < j; i++) {
449 
450  /* loop unrolled 4 times */
451  __asm__ volatile (
452  "sw $0, 0(%[p_predTime]) \n\t"
453  "sw $0, 4(%[p_predTime]) \n\t"
454  "sw $0, 8(%[p_predTime]) \n\t"
455  "sw $0, 12(%[p_predTime]) \n\t"
456  "addiu %[p_predTime], %[p_predTime], 16 \n\t"
457 
458  : [p_predTime]"+r"(p_predTime)
459  :
460  : "memory"
461  );
462  }
463  for (i = 0; i < k; i++) {
464 
465  __asm__ volatile (
466  "sw $0, 0(%[p_predTime]) \n\t"
467  "addiu %[p_predTime], %[p_predTime], 4 \n\t"
468 
469  : [p_predTime]"+r"(p_predTime)
470  :
471  : "memory"
472  );
473  }
474 
475  ac->windowing_and_mdct_ltp(ac, predFreq, predTime, &sce->ics);
476 
477  if (sce->tns.present)
478  ac->apply_tns(predFreq, &sce->tns, &sce->ics, 0);
479 
480  for (sfb = 0; sfb < FFMIN(sce->ics.max_sfb, MAX_LTP_LONG_SFB); sfb++)
481  if (ltp->used[sfb])
482  for (i = offsets[sfb]; i < offsets[sfb + 1]; i++)
483  sce->coeffs[i] += predFreq[i];
484  }
485 }
486 
487 #if HAVE_MIPSFPU
488 static void update_ltp_mips(AACContext *ac, SingleChannelElement *sce)
489 {
490  IndividualChannelStream *ics = &sce->ics;
491  float *saved = sce->saved;
492  float *saved_ltp = sce->coeffs;
493  const float *lwindow = ics->use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
494  const float *swindow = ics->use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
495  int i;
496  int loop_end, loop_end1, loop_end2;
497  float temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, temp9, temp10, temp11;
498 
499  if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
500  float *buf = saved;
501  float *buf0 = saved_ltp;
502  float *p_saved_ltp = saved_ltp + 576;
503  float *ptr1 = &saved_ltp[512];
504  float *ptr2 = &ac->buf_mdct[1023];
505  float *ptr3 = (float*)&swindow[63];
506  loop_end1 = (int)(p_saved_ltp + 448);
507 
508  /* loop unrolled 8 times */
509  __asm__ volatile (
510  ".set push \n\t"
511  ".set noreorder \n\t"
512  "addiu %[loop_end], %[src], 2048 \n\t"
513  "1: \n\t"
514  "lw %[temp0], 0(%[src]) \n\t"
515  "lw %[temp1], 4(%[src]) \n\t"
516  "lw %[temp2], 8(%[src]) \n\t"
517  "lw %[temp3], 12(%[src]) \n\t"
518  "lw %[temp4], 16(%[src]) \n\t"
519  "lw %[temp5], 20(%[src]) \n\t"
520  "lw %[temp6], 24(%[src]) \n\t"
521  "lw %[temp7], 28(%[src]) \n\t"
522  "addiu %[src], %[src], 32 \n\t"
523  "sw %[temp0], 0(%[dst]) \n\t"
524  "sw %[temp1], 4(%[dst]) \n\t"
525  "sw %[temp2], 8(%[dst]) \n\t"
526  "sw %[temp3], 12(%[dst]) \n\t"
527  "sw %[temp4], 16(%[dst]) \n\t"
528  "sw %[temp5], 20(%[dst]) \n\t"
529  "sw %[temp6], 24(%[dst]) \n\t"
530  "sw %[temp7], 28(%[dst]) \n\t"
531  "bne %[src], %[loop_end], 1b \n\t"
532  " addiu %[dst], %[dst], 32 \n\t"
533  ".set pop \n\t"
534 
535  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
536  [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
537  [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
538  [temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
539  [loop_end]"=&r"(loop_end), [src]"+r"(buf),
540  [dst]"+r"(buf0)
541  :
542  : "memory"
543  );
544 
545  /* loop unrolled 8 times */
546  __asm__ volatile (
547  "1: \n\t"
548  "sw $0, 0(%[p_saved_ltp]) \n\t"
549  "sw $0, 4(%[p_saved_ltp]) \n\t"
550  "sw $0, 8(%[p_saved_ltp]) \n\t"
551  "sw $0, 12(%[p_saved_ltp]) \n\t"
552  "sw $0, 16(%[p_saved_ltp]) \n\t"
553  "sw $0, 20(%[p_saved_ltp]) \n\t"
554  "sw $0, 24(%[p_saved_ltp]) \n\t"
555  "sw $0, 28(%[p_saved_ltp]) \n\t"
556  "addiu %[p_saved_ltp], %[p_saved_ltp], 32 \n\t"
557  "bne %[p_saved_ltp], %[loop_end1], 1b \n\t"
558 
559  : [p_saved_ltp]"+r"(p_saved_ltp)
560  : [loop_end1]"r"(loop_end1)
561  : "memory"
562  );
563 
564  ac->fdsp.vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64);
565  for (i = 0; i < 16; i++){
566  /* loop unrolled 4 times */
567  __asm__ volatile (
568  "lwc1 %[temp0], 0(%[ptr2]) \n\t"
569  "lwc1 %[temp1], -4(%[ptr2]) \n\t"
570  "lwc1 %[temp2], -8(%[ptr2]) \n\t"
571  "lwc1 %[temp3], -12(%[ptr2]) \n\t"
572  "lwc1 %[temp4], 0(%[ptr3]) \n\t"
573  "lwc1 %[temp5], -4(%[ptr3]) \n\t"
574  "lwc1 %[temp6], -8(%[ptr3]) \n\t"
575  "lwc1 %[temp7], -12(%[ptr3]) \n\t"
576  "mul.s %[temp8], %[temp0], %[temp4] \n\t"
577  "mul.s %[temp9], %[temp1], %[temp5] \n\t"
578  "mul.s %[temp10], %[temp2], %[temp6] \n\t"
579  "mul.s %[temp11], %[temp3], %[temp7] \n\t"
580  "swc1 %[temp8], 0(%[ptr1]) \n\t"
581  "swc1 %[temp9], 4(%[ptr1]) \n\t"
582  "swc1 %[temp10], 8(%[ptr1]) \n\t"
583  "swc1 %[temp11], 12(%[ptr1]) \n\t"
584  "addiu %[ptr1], %[ptr1], 16 \n\t"
585  "addiu %[ptr2], %[ptr2], -16 \n\t"
586  "addiu %[ptr3], %[ptr3], -16 \n\t"
587 
588  : [temp0]"=&f"(temp0), [temp1]"=&f"(temp1),
589  [temp2]"=&f"(temp2), [temp3]"=&f"(temp3),
590  [temp4]"=&f"(temp4), [temp5]"=&f"(temp5),
591  [temp6]"=&f"(temp6), [temp7]"=&f"(temp7),
592  [temp8]"=&f"(temp8), [temp9]"=&f"(temp9),
593  [temp10]"=&f"(temp10), [temp11]"=&f"(temp11),
594  [ptr1]"+r"(ptr1), [ptr2]"+r"(ptr2), [ptr3]"+r"(ptr3)
595  :
596  : "memory"
597  );
598  }
599  } else if (ics->window_sequence[0] == LONG_START_SEQUENCE) {
600  float *buff0 = saved;
601  float *buff1 = saved_ltp;
602  float *ptr1 = &saved_ltp[512];
603  float *ptr2 = &ac->buf_mdct[1023];
604  float *ptr3 = (float*)&swindow[63];
605  loop_end = (int)(saved + 448);
606 
607  /* loop unrolled 8 times */
608  __asm__ volatile (
609  ".set push \n\t"
610  ".set noreorder \n\t"
611  "1: \n\t"
612  "lw %[temp0], 0(%[src]) \n\t"
613  "lw %[temp1], 4(%[src]) \n\t"
614  "lw %[temp2], 8(%[src]) \n\t"
615  "lw %[temp3], 12(%[src]) \n\t"
616  "lw %[temp4], 16(%[src]) \n\t"
617  "lw %[temp5], 20(%[src]) \n\t"
618  "lw %[temp6], 24(%[src]) \n\t"
619  "lw %[temp7], 28(%[src]) \n\t"
620  "addiu %[src], %[src], 32 \n\t"
621  "sw %[temp0], 0(%[dst]) \n\t"
622  "sw %[temp1], 4(%[dst]) \n\t"
623  "sw %[temp2], 8(%[dst]) \n\t"
624  "sw %[temp3], 12(%[dst]) \n\t"
625  "sw %[temp4], 16(%[dst]) \n\t"
626  "sw %[temp5], 20(%[dst]) \n\t"
627  "sw %[temp6], 24(%[dst]) \n\t"
628  "sw %[temp7], 28(%[dst]) \n\t"
629  "sw $0, 2304(%[dst]) \n\t"
630  "sw $0, 2308(%[dst]) \n\t"
631  "sw $0, 2312(%[dst]) \n\t"
632  "sw $0, 2316(%[dst]) \n\t"
633  "sw $0, 2320(%[dst]) \n\t"
634  "sw $0, 2324(%[dst]) \n\t"
635  "sw $0, 2328(%[dst]) \n\t"
636  "sw $0, 2332(%[dst]) \n\t"
637  "bne %[src], %[loop_end], 1b \n\t"
638  " addiu %[dst], %[dst], 32 \n\t"
639  ".set pop \n\t"
640 
641  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
642  [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
643  [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
644  [temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
645  [src]"+r"(buff0), [dst]"+r"(buff1)
646  : [loop_end]"r"(loop_end)
647  : "memory"
648  );
649  ac->fdsp.vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64);
650  for (i = 0; i < 16; i++){
651  /* loop unrolled 8 times */
652  __asm__ volatile (
653  "lwc1 %[temp0], 0(%[ptr2]) \n\t"
654  "lwc1 %[temp1], -4(%[ptr2]) \n\t"
655  "lwc1 %[temp2], -8(%[ptr2]) \n\t"
656  "lwc1 %[temp3], -12(%[ptr2]) \n\t"
657  "lwc1 %[temp4], 0(%[ptr3]) \n\t"
658  "lwc1 %[temp5], -4(%[ptr3]) \n\t"
659  "lwc1 %[temp6], -8(%[ptr3]) \n\t"
660  "lwc1 %[temp7], -12(%[ptr3]) \n\t"
661  "mul.s %[temp8], %[temp0], %[temp4] \n\t"
662  "mul.s %[temp9], %[temp1], %[temp5] \n\t"
663  "mul.s %[temp10], %[temp2], %[temp6] \n\t"
664  "mul.s %[temp11], %[temp3], %[temp7] \n\t"
665  "swc1 %[temp8], 0(%[ptr1]) \n\t"
666  "swc1 %[temp9], 4(%[ptr1]) \n\t"
667  "swc1 %[temp10], 8(%[ptr1]) \n\t"
668  "swc1 %[temp11], 12(%[ptr1]) \n\t"
669  "addiu %[ptr1], %[ptr1], 16 \n\t"
670  "addiu %[ptr2], %[ptr2], -16 \n\t"
671  "addiu %[ptr3], %[ptr3], -16 \n\t"
672 
673  : [temp0]"=&f"(temp0), [temp1]"=&f"(temp1),
674  [temp2]"=&f"(temp2), [temp3]"=&f"(temp3),
675  [temp4]"=&f"(temp4), [temp5]"=&f"(temp5),
676  [temp6]"=&f"(temp6), [temp7]"=&f"(temp7),
677  [temp8]"=&f"(temp8), [temp9]"=&f"(temp9),
678  [temp10]"=&f"(temp10), [temp11]"=&f"(temp11),
679  [ptr1]"+r"(ptr1), [ptr2]"+r"(ptr2), [ptr3]"+r"(ptr3)
680  :
681  : "memory"
682  );
683  }
684  } else { // LONG_STOP or ONLY_LONG
685  float *ptr1, *ptr2, *ptr3;
686  ac->fdsp.vector_fmul_reverse(saved_ltp, ac->buf_mdct + 512, &lwindow[512], 512);
687 
688  ptr1 = &saved_ltp[512];
689  ptr2 = &ac->buf_mdct[1023];
690  ptr3 = (float*)&lwindow[511];
691 
692  for (i = 0; i < 512; i+=4){
693  /* loop unrolled 4 times */
694  __asm__ volatile (
695  "lwc1 %[temp0], 0(%[ptr2]) \n\t"
696  "lwc1 %[temp1], -4(%[ptr2]) \n\t"
697  "lwc1 %[temp2], -8(%[ptr2]) \n\t"
698  "lwc1 %[temp3], -12(%[ptr2]) \n\t"
699  "lwc1 %[temp4], 0(%[ptr3]) \n\t"
700  "lwc1 %[temp5], -4(%[ptr3]) \n\t"
701  "lwc1 %[temp6], -8(%[ptr3]) \n\t"
702  "lwc1 %[temp7], -12(%[ptr3]) \n\t"
703  "mul.s %[temp8], %[temp0], %[temp4] \n\t"
704  "mul.s %[temp9], %[temp1], %[temp5] \n\t"
705  "mul.s %[temp10], %[temp2], %[temp6] \n\t"
706  "mul.s %[temp11], %[temp3], %[temp7] \n\t"
707  "swc1 %[temp8], 0(%[ptr1]) \n\t"
708  "swc1 %[temp9], 4(%[ptr1]) \n\t"
709  "swc1 %[temp10], 8(%[ptr1]) \n\t"
710  "swc1 %[temp11], 12(%[ptr1]) \n\t"
711  "addiu %[ptr1], %[ptr1], 16 \n\t"
712  "addiu %[ptr2], %[ptr2], -16 \n\t"
713  "addiu %[ptr3], %[ptr3], -16 \n\t"
714 
715  : [temp0]"=&f"(temp0), [temp1]"=&f"(temp1),
716  [temp2]"=&f"(temp2), [temp3]"=&f"(temp3),
717  [temp4]"=&f"(temp4), [temp5]"=&f"(temp5),
718  [temp6]"=&f"(temp6), [temp7]"=&f"(temp7),
719  [temp8]"=&f"(temp8), [temp9]"=&f"(temp9),
720  [temp10]"=&f"(temp10), [temp11]"=&f"(temp11),
721  [ptr1]"+r"(ptr1), [ptr2]"+r"(ptr2),
722  [ptr3]"+r"(ptr3)
723  :
724  : "memory"
725  );
726  }
727  }
728 
729  {
730  float *buf1 = sce->ltp_state+1024;
731  float *buf2 = sce->ltp_state;
732  float *buf3 = sce->ret;
733  float *buf4 = sce->ltp_state+1024;
734  float *buf5 = saved_ltp;
735  float *buf6 = sce->ltp_state+2048;
736 
737  /* loops unrolled 8 times */
738  __asm__ volatile (
739  ".set push \n\t"
740  ".set noreorder \n\t"
741  "addiu %[loop_end], %[src], 4096 \n\t"
742  "addiu %[loop_end1], %[src1], 4096 \n\t"
743  "addiu %[loop_end2], %[src2], 4096 \n\t"
744  "1: \n\t"
745  "lw %[temp0], 0(%[src]) \n\t"
746  "lw %[temp1], 4(%[src]) \n\t"
747  "lw %[temp2], 8(%[src]) \n\t"
748  "lw %[temp3], 12(%[src]) \n\t"
749  "lw %[temp4], 16(%[src]) \n\t"
750  "lw %[temp5], 20(%[src]) \n\t"
751  "lw %[temp6], 24(%[src]) \n\t"
752  "lw %[temp7], 28(%[src]) \n\t"
753  "addiu %[src], %[src], 32 \n\t"
754  "sw %[temp0], 0(%[dst]) \n\t"
755  "sw %[temp1], 4(%[dst]) \n\t"
756  "sw %[temp2], 8(%[dst]) \n\t"
757  "sw %[temp3], 12(%[dst]) \n\t"
758  "sw %[temp4], 16(%[dst]) \n\t"
759  "sw %[temp5], 20(%[dst]) \n\t"
760  "sw %[temp6], 24(%[dst]) \n\t"
761  "sw %[temp7], 28(%[dst]) \n\t"
762  "bne %[src], %[loop_end], 1b \n\t"
763  " addiu %[dst], %[dst], 32 \n\t"
764  "2: \n\t"
765  "lw %[temp0], 0(%[src1]) \n\t"
766  "lw %[temp1], 4(%[src1]) \n\t"
767  "lw %[temp2], 8(%[src1]) \n\t"
768  "lw %[temp3], 12(%[src1]) \n\t"
769  "lw %[temp4], 16(%[src1]) \n\t"
770  "lw %[temp5], 20(%[src1]) \n\t"
771  "lw %[temp6], 24(%[src1]) \n\t"
772  "lw %[temp7], 28(%[src1]) \n\t"
773  "addiu %[src1], %[src1], 32 \n\t"
774  "sw %[temp0], 0(%[dst1]) \n\t"
775  "sw %[temp1], 4(%[dst1]) \n\t"
776  "sw %[temp2], 8(%[dst1]) \n\t"
777  "sw %[temp3], 12(%[dst1]) \n\t"
778  "sw %[temp4], 16(%[dst1]) \n\t"
779  "sw %[temp5], 20(%[dst1]) \n\t"
780  "sw %[temp6], 24(%[dst1]) \n\t"
781  "sw %[temp7], 28(%[dst1]) \n\t"
782  "bne %[src1], %[loop_end1], 2b \n\t"
783  " addiu %[dst1], %[dst1], 32 \n\t"
784  "3: \n\t"
785  "lw %[temp0], 0(%[src2]) \n\t"
786  "lw %[temp1], 4(%[src2]) \n\t"
787  "lw %[temp2], 8(%[src2]) \n\t"
788  "lw %[temp3], 12(%[src2]) \n\t"
789  "lw %[temp4], 16(%[src2]) \n\t"
790  "lw %[temp5], 20(%[src2]) \n\t"
791  "lw %[temp6], 24(%[src2]) \n\t"
792  "lw %[temp7], 28(%[src2]) \n\t"
793  "addiu %[src2], %[src2], 32 \n\t"
794  "sw %[temp0], 0(%[dst2]) \n\t"
795  "sw %[temp1], 4(%[dst2]) \n\t"
796  "sw %[temp2], 8(%[dst2]) \n\t"
797  "sw %[temp3], 12(%[dst2]) \n\t"
798  "sw %[temp4], 16(%[dst2]) \n\t"
799  "sw %[temp5], 20(%[dst2]) \n\t"
800  "sw %[temp6], 24(%[dst2]) \n\t"
801  "sw %[temp7], 28(%[dst2]) \n\t"
802  "bne %[src2], %[loop_end2], 3b \n\t"
803  " addiu %[dst2], %[dst2], 32 \n\t"
804  ".set pop \n\t"
805 
806  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
807  [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
808  [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
809  [temp6]"=&r"(temp6), [temp7]"=&r"(temp7),
810  [loop_end]"=&r"(loop_end), [loop_end1]"=&r"(loop_end1),
811  [loop_end2]"=&r"(loop_end2), [src]"+r"(buf1),
812  [dst]"+r"(buf2), [src1]"+r"(buf3), [dst1]"+r"(buf4),
813  [src2]"+r"(buf5), [dst2]"+r"(buf6)
814  :
815  : "memory"
816  );
817  }
818 }
819 #endif /* HAVE_MIPSFPU */
820 #endif /* HAVE_INLINE_ASM */
821 
822 void ff_aacdec_init_mips(AACContext *c)
823 {
824 #if HAVE_INLINE_ASM
825  c->imdct_and_windowing = imdct_and_windowing_mips;
826  c->apply_ltp = apply_ltp_mips;
827 #if HAVE_MIPSFPU
828  c->update_ltp = update_ltp_mips;
829 #endif /* HAVE_MIPSFPU */
830 #endif /* HAVE_INLINE_ASM */
831 }
v
float v
Definition: avf_showspectrum.c:88
s
const char * s
Definition: avisynth_c.h:668
IndividualChannelStream::use_kb_window
uint8_t use_kb_window[2]
If set, use Kaiser-Bessel window, otherwise use a sinus window.
Definition: aac.h:160
in
About Git write you should know how to use GIT properly Luckily Git comes with excellent documentation git help man git shows you the available git< command > help man git< command > shows information about the subcommand< command > The most comprehensive manual is the website Git Reference visit they are quite exhaustive You do not need a special username or password All you need is to provide a ssh public key to the Git server admin What follows now is a basic introduction to Git and some FFmpeg specific guidelines Read it at least if you are granted commit privileges to the FFmpeg project you are expected to be familiar with these rules I if not You can get git from etc no matter how small Every one of them has been saved from looking like a fool by this many times It s very easy for stray debug output or cosmetic modifications to slip in
Definition: git-howto.txt:5
MAX_LTP_LONG_SFB
#define MAX_LTP_LONG_SFB
Definition: aac.h:46
aacdec_mips.h
Reference: libavcodec/aacdec.c.
AACContext::apply_tns
void(* apply_tns)(float coef[1024], TemporalNoiseShaping *tns, IndividualChannelStream *ics, int decode)
Definition: aac.h:323
IndividualChannelStream::swb_offset
const uint16_t * swb_offset
table of offsets to the lowest spectral coefficient of a scalefactor band, sfb, for a particular wind...
Definition: aac.h:164
SingleChannelElement::tns
TemporalNoiseShaping tns
Definition: aac.h:229
ac
end end ac
Definition: extra/f0detectionyin.m:54
AVFloatDSPContext::vector_fmul_window
void(* vector_fmul_window)(float *dst, const float *src0, const float *src1, const float *win, int len)
Overlap/add with window function.
Definition: float_dsp.h:103
AACContext::mdct_small
FFTContext mdct_small
Definition: aac.h:292
AACContext::apply_ltp
void(* apply_ltp)(AACContext *ac, SingleChannelElement *sce)
Definition: aac.h:322
IndividualChannelStream::max_sfb
uint8_t max_sfb
number of scalefactor bands per group
Definition: aac.h:158
AACContext::fdsp
AVFloatDSPContext fdsp
Definition: aac.h:295
IndividualChannelStream::window_sequence
enum WindowSequence window_sequence[2]
Definition: aac.h:159
FFMIN
#define FFMIN(a, b)
Definition: common.h:58
aac.h
AAC definitions and structures.
u
float u
Definition: avf_showspectrum.c:88
LongTermPrediction::coef
float coef
Definition: aac.h:150
k
for k
Definition: genspecsines_sin.m:6
src
AVS_Value src
Definition: avisynth_c.h:523
LongTermPrediction
Long Term Prediction.
Definition: aac.h:147
SingleChannelElement::ics
IndividualChannelStream ics
Definition: aac.h:228
buf
void * buf
Definition: avisynth_c.h:594
i
synthesis window for stochastic i
Definition: code Kat/hpsmodel.m:34
lcg_random
static av_always_inline int lcg_random(unsigned previous_val)
linear congruential pseudorandom number generator
Definition: libavcodec/aacdec.c:829
SingleChannelElement::ret
float * ret
PCM output.
Definition: aac.h:241
AACContext
main AAC context
Definition: aac.h:262
IndividualChannelStream::ltp
LongTermPrediction ltp
Definition: aac.h:163
FFTContext::imdct_half
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:82
LongTermPrediction::lag
int16_t lag
Definition: aac.h:149
SingleChannelElement
Single Channel Element - used for both SCE and LFE elements.
Definition: aac.h:227
c
static double c[64]
Definition: vsrc_mptestsrc.c:88
IndividualChannelStream
Individual Channel Stream.
Definition: aac.h:157
AACContext::update_ltp
void(* update_ltp)(AACContext *ac, SingleChannelElement *sce)
Definition: aac.h:327
dst
else dst[i][x+y *dst_stride[i]]
Definition: vf_mcdeint.c:160
AACContext::windowing_and_mdct_ltp
void(* windowing_and_mdct_ltp)(AACContext *ac, float *out, float *in, IndividualChannelStream *ics)
Definition: aac.h:325
AACContext::mdct
FFTContext mdct
Definition: aac.h:291
av_always_inline
#define av_always_inline
Definition: attributes.h:41
out
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);return NULL;}return ac;}in_planar=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> out
Definition: audio_convert.c:194
AACContext::imdct_and_windowing
void(* imdct_and_windowing)(AACContext *ac, SingleChannelElement *sce)
Definition: aac.h:321
LongTermPrediction::used
int8_t used[MAX_LTP_LONG_SFB]
Definition: aac.h:151
ff_aacdec_init_mips
void ff_aacdec_init_mips(AACContext *c)
Definition: aacdec_mips.c:822
aactab.h
AAC data declarations.
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:467
AVFloatDSPContext::vector_fmul_reverse
void(* vector_fmul_reverse)(float *dst, const float *src0, const float *src1, int len)
Calculate the product of two vectors of floats, and store the result in a vector of floats...
Definition: float_dsp.h:140
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