FFmpeg
ac3dsp_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: Branimir Vasic (bvasic@mips.com)
30  * Nedeljko Babic (nbabic@mips.com)
31  *
32  * Various AC-3 DSP Utils optimized for MIPS
33  *
34  * This file is part of FFmpeg.
35  *
36  * FFmpeg is free software; you can redistribute it and/or
37  * modify it under the terms of the GNU Lesser General Public
38  * License as published by the Free Software Foundation; either
39  * version 2.1 of the License, or (at your option) any later version.
40  *
41  * FFmpeg is distributed in the hope that it will be useful,
42  * but WITHOUT ANY WARRANTY; without even the implied warranty of
43  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
44  * Lesser General Public License for more details.
45  *
46  * You should have received a copy of the GNU Lesser General Public
47  * License along with FFmpeg; if not, write to the Free Software
48  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
49  */
50 
51 /**
52  * @file
53  * Reference: libavcodec/ac3dsp.c
54  */
55 
56 #include "config.h"
57 #include "libavcodec/ac3dsp.h"
58 #include "libavcodec/ac3.h"
59 #include "libavcodec/ac3tab.h"
60 #include "libavutil/mips/asmdefs.h"
61 
62 #if HAVE_INLINE_ASM
63 #if HAVE_MIPSDSP
64 static void ac3_bit_alloc_calc_bap_mips(int16_t *mask, int16_t *psd,
65  int start, int end,
66  int snr_offset, int floor,
67  const uint8_t *bap_tab, uint8_t *bap)
68 {
69  int band, band_end, cond;
70  int m, address1, address2;
71  int16_t *psd1, *psd_end;
72  uint8_t *bap1;
73 
74  if (snr_offset == -960) {
75  memset(bap, 0, AC3_MAX_COEFS);
76  return;
77  }
78 
79  psd1 = &psd[start];
80  bap1 = &bap[start];
81  band = ff_ac3_bin_to_band_tab[start];
82 
83  do {
84  m = (FFMAX(mask[band] - snr_offset - floor, 0) & 0x1FE0) + floor;
85  band_end = ff_ac3_band_start_tab[++band];
86  band_end = FFMIN(band_end, end);
87  psd_end = psd + band_end - 1;
88 
89  __asm__ volatile (
90  "slt %[cond], %[psd1], %[psd_end] \n\t"
91  "beqz %[cond], 1f \n\t"
92  "2: \n\t"
93  "lh %[address1], 0(%[psd1]) \n\t"
94  "lh %[address2], 2(%[psd1]) \n\t"
95  PTR_ADDIU " %[psd1], %[psd1], 4 \n\t"
96  "subu %[address1], %[address1], %[m] \n\t"
97  "sra %[address1], %[address1], 5 \n\t"
98  "addiu %[address1], %[address1], -32 \n\t"
99  "shll_s.w %[address1], %[address1], 26 \n\t"
100  "subu %[address2], %[address2], %[m] \n\t"
101  "sra %[address2], %[address2], 5 \n\t"
102  "sra %[address1], %[address1], 26 \n\t"
103  "addiu %[address1], %[address1], 32 \n\t"
104  "lbux %[address1], %[address1](%[bap_tab]) \n\t"
105  "addiu %[address2], %[address2], -32 \n\t"
106  "shll_s.w %[address2], %[address2], 26 \n\t"
107  "sb %[address1], 0(%[bap1]) \n\t"
108  "slt %[cond], %[psd1], %[psd_end] \n\t"
109  "sra %[address2], %[address2], 26 \n\t"
110  "addiu %[address2], %[address2], 32 \n\t"
111  "lbux %[address2], %[address2](%[bap_tab]) \n\t"
112  "sb %[address2], 1(%[bap1]) \n\t"
113  PTR_ADDIU " %[bap1], %[bap1], 2 \n\t"
114  "bnez %[cond], 2b \n\t"
115  PTR_ADDIU " %[psd_end], %[psd_end], 2 \n\t"
116  "slt %[cond], %[psd1], %[psd_end] \n\t"
117  "beqz %[cond], 3f \n\t"
118  "1: \n\t"
119  "lh %[address1], 0(%[psd1]) \n\t"
120  PTR_ADDIU " %[psd1], %[psd1], 2 \n\t"
121  "subu %[address1], %[address1], %[m] \n\t"
122  "sra %[address1], %[address1], 5 \n\t"
123  "addiu %[address1], %[address1], -32 \n\t"
124  "shll_s.w %[address1], %[address1], 26 \n\t"
125  "sra %[address1], %[address1], 26 \n\t"
126  "addiu %[address1], %[address1], 32 \n\t"
127  "lbux %[address1], %[address1](%[bap_tab]) \n\t"
128  "sb %[address1], 0(%[bap1]) \n\t"
129  PTR_ADDIU " %[bap1], %[bap1], 1 \n\t"
130  "3: \n\t"
131 
132  : [address1]"=&r"(address1), [address2]"=&r"(address2),
133  [cond]"=&r"(cond), [bap1]"+r"(bap1),
134  [psd1]"+r"(psd1), [psd_end]"+r"(psd_end)
135  : [m]"r"(m), [bap_tab]"r"(bap_tab)
136  : "memory"
137  );
138  } while (end > band_end);
139 }
140 
141 static void ac3_update_bap_counts_mips(uint16_t mant_cnt[16], uint8_t *bap,
142  int len)
143 {
144  void *temp0, *temp2, *temp4, *temp5, *temp6, *temp7;
145  int temp1, temp3;
146 
147  __asm__ volatile (
148  "andi %[temp3], %[len], 3 \n\t"
149  PTR_ADDU "%[temp2], %[bap], %[len] \n\t"
150  PTR_ADDU "%[temp4], %[bap], %[temp3] \n\t"
151  "beq %[temp2], %[temp4], 4f \n\t"
152  "1: \n\t"
153  "lbu %[temp0], -1(%[temp2]) \n\t"
154  "lbu %[temp5], -2(%[temp2]) \n\t"
155  "lbu %[temp6], -3(%[temp2]) \n\t"
156  "sll %[temp0], %[temp0], 1 \n\t"
157  PTR_ADDU "%[temp0], %[mant_cnt], %[temp0] \n\t"
158  "sll %[temp5], %[temp5], 1 \n\t"
159  PTR_ADDU "%[temp5], %[mant_cnt], %[temp5] \n\t"
160  "lhu %[temp1], 0(%[temp0]) \n\t"
161  "sll %[temp6], %[temp6], 1 \n\t"
162  PTR_ADDU "%[temp6], %[mant_cnt], %[temp6] \n\t"
163  "addiu %[temp1], %[temp1], 1 \n\t"
164  "sh %[temp1], 0(%[temp0]) \n\t"
165  "lhu %[temp1], 0(%[temp5]) \n\t"
166  "lbu %[temp7], -4(%[temp2]) \n\t"
167  PTR_ADDIU "%[temp2],%[temp2], -4 \n\t"
168  "addiu %[temp1], %[temp1], 1 \n\t"
169  "sh %[temp1], 0(%[temp5]) \n\t"
170  "lhu %[temp1], 0(%[temp6]) \n\t"
171  "sll %[temp7], %[temp7], 1 \n\t"
172  PTR_ADDU "%[temp7], %[mant_cnt], %[temp7] \n\t"
173  "addiu %[temp1], %[temp1],1 \n\t"
174  "sh %[temp1], 0(%[temp6]) \n\t"
175  "lhu %[temp1], 0(%[temp7]) \n\t"
176  "addiu %[temp1], %[temp1], 1 \n\t"
177  "sh %[temp1], 0(%[temp7]) \n\t"
178  "bne %[temp2], %[temp4], 1b \n\t"
179  "4: \n\t"
180  "beqz %[temp3], 2f \n\t"
181  "3: \n\t"
182  "addiu %[temp3], %[temp3], -1 \n\t"
183  "lbu %[temp0], -1(%[temp2]) \n\t"
184  PTR_ADDIU "%[temp2],%[temp2], -1 \n\t"
185  "sll %[temp0], %[temp0], 1 \n\t"
186  PTR_ADDU "%[temp0], %[mant_cnt], %[temp0] \n\t"
187  "lhu %[temp1], 0(%[temp0]) \n\t"
188  "addiu %[temp1], %[temp1], 1 \n\t"
189  "sh %[temp1], 0(%[temp0]) \n\t"
190  "bgtz %[temp3], 3b \n\t"
191  "2: \n\t"
192 
193  : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
194  [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
195  [temp4] "=&r" (temp4), [temp5] "=&r" (temp5),
196  [temp6] "=&r" (temp6), [temp7] "=&r" (temp7)
197  : [len] "r" (len), [bap] "r" (bap),
198  [mant_cnt] "r" (mant_cnt)
199  : "memory"
200  );
201 }
202 #endif
203 
204 #if HAVE_MIPSFPU
205 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
206 static void float_to_fixed24_mips(int32_t *dst, const float *src, unsigned int len)
207 {
208  const float scale = 1 << 24;
209  float src0, src1, src2, src3, src4, src5, src6, src7;
210  int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
211 
212  do {
213  __asm__ volatile (
214  "lwc1 %[src0], 0(%[src]) \n\t"
215  "lwc1 %[src1], 4(%[src]) \n\t"
216  "lwc1 %[src2], 8(%[src]) \n\t"
217  "lwc1 %[src3], 12(%[src]) \n\t"
218  "lwc1 %[src4], 16(%[src]) \n\t"
219  "lwc1 %[src5], 20(%[src]) \n\t"
220  "lwc1 %[src6], 24(%[src]) \n\t"
221  "lwc1 %[src7], 28(%[src]) \n\t"
222  "mul.s %[src0], %[src0], %[scale] \n\t"
223  "mul.s %[src1], %[src1], %[scale] \n\t"
224  "mul.s %[src2], %[src2], %[scale] \n\t"
225  "mul.s %[src3], %[src3], %[scale] \n\t"
226  "mul.s %[src4], %[src4], %[scale] \n\t"
227  "mul.s %[src5], %[src5], %[scale] \n\t"
228  "mul.s %[src6], %[src6], %[scale] \n\t"
229  "mul.s %[src7], %[src7], %[scale] \n\t"
230  "cvt.w.s %[src0], %[src0] \n\t"
231  "cvt.w.s %[src1], %[src1] \n\t"
232  "cvt.w.s %[src2], %[src2] \n\t"
233  "cvt.w.s %[src3], %[src3] \n\t"
234  "cvt.w.s %[src4], %[src4] \n\t"
235  "cvt.w.s %[src5], %[src5] \n\t"
236  "cvt.w.s %[src6], %[src6] \n\t"
237  "cvt.w.s %[src7], %[src7] \n\t"
238  "mfc1 %[temp0], %[src0] \n\t"
239  "mfc1 %[temp1], %[src1] \n\t"
240  "mfc1 %[temp2], %[src2] \n\t"
241  "mfc1 %[temp3], %[src3] \n\t"
242  "mfc1 %[temp4], %[src4] \n\t"
243  "mfc1 %[temp5], %[src5] \n\t"
244  "mfc1 %[temp6], %[src6] \n\t"
245  "mfc1 %[temp7], %[src7] \n\t"
246  "sw %[temp0], 0(%[dst]) \n\t"
247  "sw %[temp1], 4(%[dst]) \n\t"
248  "sw %[temp2], 8(%[dst]) \n\t"
249  "sw %[temp3], 12(%[dst]) \n\t"
250  "sw %[temp4], 16(%[dst]) \n\t"
251  "sw %[temp5], 20(%[dst]) \n\t"
252  "sw %[temp6], 24(%[dst]) \n\t"
253  "sw %[temp7], 28(%[dst]) \n\t"
254 
255  : [dst] "+r" (dst), [src] "+r" (src),
256  [src0] "=&f" (src0), [src1] "=&f" (src1),
257  [src2] "=&f" (src2), [src3] "=&f" (src3),
258  [src4] "=&f" (src4), [src5] "=&f" (src5),
259  [src6] "=&f" (src6), [src7] "=&f" (src7),
260  [temp0] "=r" (temp0), [temp1] "=r" (temp1),
261  [temp2] "=r" (temp2), [temp3] "=r" (temp3),
262  [temp4] "=r" (temp4), [temp5] "=r" (temp5),
263  [temp6] "=r" (temp6), [temp7] "=r" (temp7)
264  : [scale] "f" (scale)
265  : "memory"
266  );
267  src = src + 8;
268  dst = dst + 8;
269  len -= 8;
270  } while (len > 0);
271 }
272 
273 static void ac3_downmix_mips(float **samples, float (*matrix)[2],
274  int out_ch, int in_ch, int len)
275 {
276  int i, j, i1, i2, i3;
277  float v0, v1, v2, v3;
278  float v4, v5, v6, v7;
279  float samples0, samples1, samples2, samples3, matrix_j, matrix_j2;
280  float *samples_p, *samples_sw, *matrix_p, **samples_x, **samples_end;
281 
282  __asm__ volatile(
283  ".set push \n\t"
284  ".set noreorder \n\t"
285 
286  "li %[i1], 2 \n\t"
287  "sll %[len], 2 \n\t"
288  "move %[i], $zero \n\t"
289  "sll %[j], %[in_ch], " PTRLOG " \n\t"
290 
291  "bne %[out_ch], %[i1], 3f \n\t" // if (out_ch == 2)
292  " li %[i2], 1 \n\t"
293 
294  "2: \n\t" // start of the for loop (for (i = 0; i < len; i+=4))
295  "move %[matrix_p], %[matrix] \n\t"
296  "move %[samples_x], %[samples] \n\t"
297  "mtc1 $zero, %[v0] \n\t"
298  "mtc1 $zero, %[v1] \n\t"
299  "mtc1 $zero, %[v2] \n\t"
300  "mtc1 $zero, %[v3] \n\t"
301  "mtc1 $zero, %[v4] \n\t"
302  "mtc1 $zero, %[v5] \n\t"
303  "mtc1 $zero, %[v6] \n\t"
304  "mtc1 $zero, %[v7] \n\t"
305  "addiu %[i1], %[i], 4 \n\t"
306  "addiu %[i2], %[i], 8 \n\t"
307  PTR_L " %[samples_p], 0(%[samples_x]) \n\t"
308  "addiu %[i3], %[i], 12 \n\t"
309  PTR_ADDU "%[samples_end],%[samples_x], %[j] \n\t"
310  "move %[samples_sw], %[samples_p] \n\t"
311 
312  "1: \n\t" // start of the inner for loop (for (j = 0; j < in_ch; j++))
313  "lwc1 %[matrix_j], 0(%[matrix_p]) \n\t"
314  "lwc1 %[matrix_j2], 4(%[matrix_p]) \n\t"
315  "lwxc1 %[samples0], %[i](%[samples_p]) \n\t"
316  "lwxc1 %[samples1], %[i1](%[samples_p]) \n\t"
317  "lwxc1 %[samples2], %[i2](%[samples_p]) \n\t"
318  "lwxc1 %[samples3], %[i3](%[samples_p]) \n\t"
319  PTR_ADDIU "%[matrix_p], 8 \n\t"
320  PTR_ADDIU "%[samples_x]," PTRSIZE " \n\t"
321  "madd.s %[v0], %[v0], %[samples0], %[matrix_j] \n\t"
322  "madd.s %[v1], %[v1], %[samples1], %[matrix_j] \n\t"
323  "madd.s %[v2], %[v2], %[samples2], %[matrix_j] \n\t"
324  "madd.s %[v3], %[v3], %[samples3], %[matrix_j] \n\t"
325  "madd.s %[v4], %[v4], %[samples0], %[matrix_j2]\n\t"
326  "madd.s %[v5], %[v5], %[samples1], %[matrix_j2]\n\t"
327  "madd.s %[v6], %[v6], %[samples2], %[matrix_j2]\n\t"
328  "madd.s %[v7], %[v7], %[samples3], %[matrix_j2]\n\t"
329  "bne %[samples_x], %[samples_end], 1b \n\t"
330  PTR_L " %[samples_p], 0(%[samples_x]) \n\t"
331 
332  PTR_L " %[samples_p], " PTRSIZE "(%[samples]) \n\t"
333  "swxc1 %[v0], %[i](%[samples_sw]) \n\t"
334  "swxc1 %[v1], %[i1](%[samples_sw]) \n\t"
335  "swxc1 %[v2], %[i2](%[samples_sw]) \n\t"
336  "swxc1 %[v3], %[i3](%[samples_sw]) \n\t"
337  "swxc1 %[v4], %[i](%[samples_p]) \n\t"
338  "addiu %[i], 16 \n\t"
339  "swxc1 %[v5], %[i1](%[samples_p]) \n\t"
340  "swxc1 %[v6], %[i2](%[samples_p]) \n\t"
341  "bne %[i], %[len], 2b \n\t"
342  " swxc1 %[v7], %[i3](%[samples_p]) \n\t"
343 
344  "3: \n\t"
345  "bne %[out_ch], %[i2], 6f \n\t" // if (out_ch == 1)
346  " nop \n\t"
347 
348  "5: \n\t" // start of the outer for loop (for (i = 0; i < len; i+=4))
349  "move %[matrix_p], %[matrix] \n\t"
350  "move %[samples_x], %[samples] \n\t"
351  "mtc1 $zero, %[v0] \n\t"
352  "mtc1 $zero, %[v1] \n\t"
353  "mtc1 $zero, %[v2] \n\t"
354  "mtc1 $zero, %[v3] \n\t"
355  "addiu %[i1], %[i], 4 \n\t"
356  "addiu %[i2], %[i], 8 \n\t"
357  PTR_L " %[samples_p], 0(%[samples_x]) \n\t"
358  "addiu %[i3], %[i], 12 \n\t"
359  PTR_ADDU "%[samples_end],%[samples_x], %[j] \n\t"
360  "move %[samples_sw], %[samples_p] \n\t"
361 
362  "4: \n\t" // start of the inner for loop (for (j = 0; j < in_ch; j++))
363  "lwc1 %[matrix_j], 0(%[matrix_p]) \n\t"
364  "lwxc1 %[samples0], %[i](%[samples_p]) \n\t"
365  "lwxc1 %[samples1], %[i1](%[samples_p]) \n\t"
366  "lwxc1 %[samples2], %[i2](%[samples_p]) \n\t"
367  "lwxc1 %[samples3], %[i3](%[samples_p]) \n\t"
368  PTR_ADDIU "%[matrix_p], 8 \n\t"
369  PTR_ADDIU "%[samples_x]," PTRSIZE " \n\t"
370  "madd.s %[v0], %[v0], %[samples0], %[matrix_j] \n\t"
371  "madd.s %[v1], %[v1], %[samples1], %[matrix_j] \n\t"
372  "madd.s %[v2], %[v2], %[samples2], %[matrix_j] \n\t"
373  "madd.s %[v3], %[v3], %[samples3], %[matrix_j] \n\t"
374  "bne %[samples_x], %[samples_end], 4b \n\t"
375  PTR_L " %[samples_p], 0(%[samples_x]) \n\t"
376 
377  "swxc1 %[v0], %[i](%[samples_sw]) \n\t"
378  "addiu %[i], 16 \n\t"
379  "swxc1 %[v1], %[i1](%[samples_sw]) \n\t"
380  "swxc1 %[v2], %[i2](%[samples_sw]) \n\t"
381  "bne %[i], %[len], 5b \n\t"
382  " swxc1 %[v3], %[i3](%[samples_sw]) \n\t"
383  "6: \n\t"
384 
385  ".set pop"
386  :[samples_p]"=&r"(samples_p), [matrix_j]"=&f"(matrix_j), [matrix_j2]"=&f"(matrix_j2),
387  [samples0]"=&f"(samples0), [samples1]"=&f"(samples1),
388  [samples2]"=&f"(samples2), [samples3]"=&f"(samples3),
389  [v0]"=&f"(v0), [v1]"=&f"(v1), [v2]"=&f"(v2), [v3]"=&f"(v3),
390  [v4]"=&f"(v4), [v5]"=&f"(v5), [v6]"=&f"(v6), [v7]"=&f"(v7),
391  [samples_x]"=&r"(samples_x), [matrix_p]"=&r"(matrix_p),
392  [samples_end]"=&r"(samples_end), [samples_sw]"=&r"(samples_sw),
393  [i1]"=&r"(i1), [i2]"=&r"(i2), [i3]"=&r"(i3), [i]"=&r"(i),
394  [j]"=&r"(j), [len]"+r"(len)
395  :[samples]"r"(samples), [matrix]"r"(matrix),
396  [in_ch]"r"(in_ch), [out_ch]"r"(out_ch)
397  :"memory"
398  );
399 }
400 #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
401 #endif /* HAVE_MIPSFPU */
402 #endif /* HAVE_INLINE_ASM */
403 
404 void ff_ac3dsp_init_mips(AC3DSPContext *c, int bit_exact) {
405 #if HAVE_INLINE_ASM
406 #if HAVE_MIPSDSP
407  c->bit_alloc_calc_bap = ac3_bit_alloc_calc_bap_mips;
408  c->update_bap_counts = ac3_update_bap_counts_mips;
409 #endif
410 #if HAVE_MIPSFPU
411 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
412  c->float_to_fixed24 = float_to_fixed24_mips;
413  //c->downmix = ac3_downmix_mips;
414 #endif
415 #endif
416 
417 #endif
418 }
ff_ac3_bin_to_band_tab
const uint8_t ff_ac3_bin_to_band_tab[253]
Map each frequency coefficient bin to the critical band that contains it.
Definition: ac3.c:47
matrix
Definition: vc1dsp.c:42
src1
const pixel * src1
Definition: h264pred_template.c:421
AC3DSPContext
Definition: ac3dsp.h:33
asmdefs.h
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
PTRSIZE
#define PTRSIZE
Definition: asmdefs.h:47
v0
#define v0
Definition: regdef.h:26
scale
static av_always_inline float scale(float x, float s)
Definition: vf_v360.c:1389
PTRLOG
#define PTRLOG
Definition: asmdefs.h:48
mask
static const uint16_t mask[17]
Definition: lzw.c:38
floor
static __device__ float floor(float a)
Definition: cuda_runtime.h:173
AC3_MAX_COEFS
#define AC3_MAX_COEFS
Definition: ac3defs.h:29
ff_ac3_band_start_tab
const uint8_t ff_ac3_band_start_tab[AC3_CRITICAL_BANDS+1]
Starting frequency coefficient bin for each critical band.
Definition: ac3.c:36
bap_tab
static const uint8_t bap_tab[64]
Definition: dolby_e.c:598
ac3dsp.h
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
src2
const pixel * src2
Definition: h264pred_template.c:422
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
len
int len
Definition: vorbis_enc_data.h:426
__asm__
__asm__(".macro parse_r var r\n\t" "\\var = -1\n\t" _IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3) _IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7) _IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11) _IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15) _IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19) _IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23) _IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27) _IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31) ".iflt \\var\n\t" ".error \"Unable to parse register name \\r\"\n\t" ".endif\n\t" ".endm")
PTR_ADDU
#define PTR_ADDU
Definition: asmdefs.h:49
ff_ac3dsp_init_mips
void ff_ac3dsp_init_mips(AC3DSPContext *c, int bit_exact)
Definition: ac3dsp_mips.c:404
PTR_ADDIU
#define PTR_ADDIU
Definition: asmdefs.h:50
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition: filter_design.txt:8
src0
const pixel *const src0
Definition: h264pred_template.c:420
PTR_L
#define PTR_L
Definition: asmdefs.h:53
ac3.h
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
int32_t
int32_t
Definition: audioconvert.c:56
ac3tab.h
cond
int(* cond)(enum AVPixelFormat pix_fmt)
Definition: pixdesc_query.c:28
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