FFmpeg: libavcodec/wmadec.c Source File

FFmpeg
wmadec.c
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1 /*
2  * WMA compatible decoder
3  * Copyright (c) 2002 The FFmpeg Project
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * WMA compatible decoder.
25  * This decoder handles Microsoft Windows Media Audio data, versions 1 & 2.
26  * WMA v1 is identified by audio format 0x160 in Microsoft media files
27  * (ASF/AVI/WAV). WMA v2 is identified by audio format 0x161.
28  *
29  * To use this decoder, a calling application must supply the extra data
30  * bytes provided with the WMA data. These are the extra, codec-specific
31  * bytes at the end of a WAVEFORMATEX data structure. Transmit these bytes
32  * to the decoder using the extradata[_size] fields in AVCodecContext. There
33  * should be 4 extra bytes for v1 data and 6 extra bytes for v2 data.
34  */
35 
36 #include "libavutil/attributes.h"
37 #include "libavutil/ffmath.h"
38 
39 #include "avcodec.h"
40 #include "internal.h"
41 #include "wma.h"
42 
43  #define EXPVLCBITS 8
44  #define EXPMAX ((19 + EXPVLCBITS - 1) / EXPVLCBITS)
45 
46  #define HGAINVLCBITS 9
47  #define HGAINMAX ((13 + HGAINVLCBITS - 1) / HGAINVLCBITS)
48 
49 static void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len);
50 
51 #ifdef TRACE
52 static void dump_floats(WMACodecContext *s, const char *name,
53  int prec, const float *tab, int n)
54 {
55  int i;
56 
57  ff_tlog(s->avctx, "%s[%d]:\n", name, n);
58  for (i = 0; i < n; i++) {
59  if ((i & 7) == 0)
60  ff_tlog(s->avctx, "%4d: ", i);
61  ff_tlog(s->avctx, " %8.*f", prec, tab[i]);
62  if ((i & 7) == 7)
63  ff_tlog(s->avctx, "\n");
64  }
65  if ((i & 7) != 0)
66  ff_tlog(s->avctx, "\n");
67 }
68 #endif /* TRACE */
69 
70  static av_cold int wma_decode_init(AVCodecContext *avctx)
71 {
72  WMACodecContext *s = avctx->priv_data;
73  int i, flags2;
74  uint8_t *extradata;
75 
76  if (!avctx->block_align) {
77  av_log(avctx, AV_LOG_ERROR, "block_align is not set\n");
78  return AVERROR(EINVAL);
79  }
80 
81  s->avctx = avctx;
82 
83  /* extract flag info */
84  flags2 = 0;
85  extradata = avctx->extradata;
86  if (avctx->codec->id == AV_CODEC_ID_WMAV1 && avctx->extradata_size >= 4)
87  flags2 = AV_RL16(extradata + 2);
88  else if (avctx->codec->id == AV_CODEC_ID_WMAV2 && avctx->extradata_size >= 6)
89  flags2 = AV_RL16(extradata + 4);
90 
91  s->use_exp_vlc = flags2 & 0x0001;
92  s->use_bit_reservoir = flags2 & 0x0002;
93  s->use_variable_block_len = flags2 & 0x0004;
94 
95  if (avctx->codec->id == AV_CODEC_ID_WMAV2 && avctx->extradata_size >= 8){
96  if (AV_RL16(extradata+4)==0xd && s->use_variable_block_len){
97  av_log(avctx, AV_LOG_WARNING, "Disabling use_variable_block_len, if this fails contact the ffmpeg developers and send us the file\n");
98  s->use_variable_block_len= 0; // this fixes issue1503
99  }
100  }
101 
102  for (i=0; i<MAX_CHANNELS; i++)
103  s->max_exponent[i] = 1.0;
104 
105  if (ff_wma_init(avctx, flags2) < 0)
106  return -1;
107 
108  /* init MDCT */
109  for (i = 0; i < s->nb_block_sizes; i++)
110  ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 1, 1.0 / 32768.0);
111 
112  if (s->use_noise_coding) {
113  init_vlc(&s->hgain_vlc, HGAINVLCBITS, sizeof(ff_wma_hgain_huffbits),
114  ff_wma_hgain_huffbits, 1, 1,
115  ff_wma_hgain_huffcodes, 2, 2, 0);
116  }
117 
118  if (s->use_exp_vlc)
119  init_vlc(&s->exp_vlc, EXPVLCBITS, sizeof(ff_aac_scalefactor_bits), // FIXME move out of context
120  ff_aac_scalefactor_bits, 1, 1,
121  ff_aac_scalefactor_code, 4, 4, 0);
122  else
123  wma_lsp_to_curve_init(s, s->frame_len);
124 
125  avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
126 
127  return 0;
128 }
129 
130 /**
131  * compute x^-0.25 with an exponent and mantissa table. We use linear
132  * interpolation to reduce the mantissa table size at a small speed
133  * expense (linear interpolation approximately doubles the number of
134  * bits of precision).
135  */
136  static inline float pow_m1_4(WMACodecContext *s, float x)
137 {
138  union {
139  float f;
140  unsigned int v;
141  } u, t;
142  unsigned int e, m;
143  float a, b;
144 
145  u.f = x;
146  e = u.v >> 23;
147  m = (u.v >> (23 - LSP_POW_BITS)) & ((1 << LSP_POW_BITS) - 1);
148  /* build interpolation scale: 1 <= t < 2. */
149  t.v = ((u.v << LSP_POW_BITS) & ((1 << 23) - 1)) | (127 << 23);
150  a = s->lsp_pow_m_table1[m];
151  b = s->lsp_pow_m_table2[m];
152  return s->lsp_pow_e_table[e] * (a + b * t.f);
153 }
154 
155  static av_cold void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len)
156 {
157  float wdel, a, b;
158  int i, e, m;
159 
160  wdel = M_PI / frame_len;
161  for (i = 0; i < frame_len; i++)
162  s->lsp_cos_table[i] = 2.0f * cos(wdel * i);
163 
164  /* tables for x^-0.25 computation */
165  for (i = 0; i < 256; i++) {
166  e = i - 126;
167  s->lsp_pow_e_table[i] = exp2f(e * -0.25);
168  }
169 
170  /* NOTE: these two tables are needed to avoid two operations in
171  * pow_m1_4 */
172  b = 1.0;
173  for (i = (1 << LSP_POW_BITS) - 1; i >= 0; i--) {
174  m = (1 << LSP_POW_BITS) + i;
175  a = (float) m * (0.5 / (1 << LSP_POW_BITS));
176  a = 1/sqrt(sqrt(a));
177  s->lsp_pow_m_table1[i] = 2 * a - b;
178  s->lsp_pow_m_table2[i] = b - a;
179  b = a;
180  }
181 }
182 
183 /**
184  * NOTE: We use the same code as Vorbis here
185  * @todo optimize it further with SSE/3Dnow
186  */
187  static void wma_lsp_to_curve(WMACodecContext *s, float *out, float *val_max_ptr,
188  int n, float *lsp)
189 {
190  int i, j;
191  float p, q, w, v, val_max;
192 
193  val_max = 0;
194  for (i = 0; i < n; i++) {
195  p = 0.5f;
196  q = 0.5f;
197  w = s->lsp_cos_table[i];
198  for (j = 1; j < NB_LSP_COEFS; j += 2) {
199  q *= w - lsp[j - 1];
200  p *= w - lsp[j];
201  }
202  p *= p * (2.0f - w);
203  q *= q * (2.0f + w);
204  v = p + q;
205  v = pow_m1_4(s, v);
206  if (v > val_max)
207  val_max = v;
208  out[i] = v;
209  }
210  *val_max_ptr = val_max;
211 }
212 
213 /**
214  * decode exponents coded with LSP coefficients (same idea as Vorbis)
215  */
216  static void decode_exp_lsp(WMACodecContext *s, int ch)
217 {
218  float lsp_coefs[NB_LSP_COEFS];
219  int val, i;
220 
221  for (i = 0; i < NB_LSP_COEFS; i++) {
222  if (i == 0 || i >= 8)
223  val = get_bits(&s->gb, 3);
224  else
225  val = get_bits(&s->gb, 4);
226  lsp_coefs[i] = ff_wma_lsp_codebook[i][val];
227  }
228 
229  wma_lsp_to_curve(s, s->exponents[ch], &s->max_exponent[ch],
230  s->block_len, lsp_coefs);
231 }
232 
233 /** pow(10, i / 16.0) for i in -60..95 */
234  static const float pow_tab[] = {
235  1.7782794100389e-04, 2.0535250264571e-04,
236  2.3713737056617e-04, 2.7384196342644e-04,
237  3.1622776601684e-04, 3.6517412725484e-04,
238  4.2169650342858e-04, 4.8696752516586e-04,
239  5.6234132519035e-04, 6.4938163157621e-04,
240  7.4989420933246e-04, 8.6596432336006e-04,
241  1.0000000000000e-03, 1.1547819846895e-03,
242  1.3335214321633e-03, 1.5399265260595e-03,
243  1.7782794100389e-03, 2.0535250264571e-03,
244  2.3713737056617e-03, 2.7384196342644e-03,
245  3.1622776601684e-03, 3.6517412725484e-03,
246  4.2169650342858e-03, 4.8696752516586e-03,
247  5.6234132519035e-03, 6.4938163157621e-03,
248  7.4989420933246e-03, 8.6596432336006e-03,
249  1.0000000000000e-02, 1.1547819846895e-02,
250  1.3335214321633e-02, 1.5399265260595e-02,
251  1.7782794100389e-02, 2.0535250264571e-02,
252  2.3713737056617e-02, 2.7384196342644e-02,
253  3.1622776601684e-02, 3.6517412725484e-02,
254  4.2169650342858e-02, 4.8696752516586e-02,
255  5.6234132519035e-02, 6.4938163157621e-02,
256  7.4989420933246e-02, 8.6596432336007e-02,
257  1.0000000000000e-01, 1.1547819846895e-01,
258  1.3335214321633e-01, 1.5399265260595e-01,
259  1.7782794100389e-01, 2.0535250264571e-01,
260  2.3713737056617e-01, 2.7384196342644e-01,
261  3.1622776601684e-01, 3.6517412725484e-01,
262  4.2169650342858e-01, 4.8696752516586e-01,
263  5.6234132519035e-01, 6.4938163157621e-01,
264  7.4989420933246e-01, 8.6596432336007e-01,
265  1.0000000000000e+00, 1.1547819846895e+00,
266  1.3335214321633e+00, 1.5399265260595e+00,
267  1.7782794100389e+00, 2.0535250264571e+00,
268  2.3713737056617e+00, 2.7384196342644e+00,
269  3.1622776601684e+00, 3.6517412725484e+00,
270  4.2169650342858e+00, 4.8696752516586e+00,
271  5.6234132519035e+00, 6.4938163157621e+00,
272  7.4989420933246e+00, 8.6596432336007e+00,
273  1.0000000000000e+01, 1.1547819846895e+01,
274  1.3335214321633e+01, 1.5399265260595e+01,
275  1.7782794100389e+01, 2.0535250264571e+01,
276  2.3713737056617e+01, 2.7384196342644e+01,
277  3.1622776601684e+01, 3.6517412725484e+01,
278  4.2169650342858e+01, 4.8696752516586e+01,
279  5.6234132519035e+01, 6.4938163157621e+01,
280  7.4989420933246e+01, 8.6596432336007e+01,
281  1.0000000000000e+02, 1.1547819846895e+02,
282  1.3335214321633e+02, 1.5399265260595e+02,
283  1.7782794100389e+02, 2.0535250264571e+02,
284  2.3713737056617e+02, 2.7384196342644e+02,
285  3.1622776601684e+02, 3.6517412725484e+02,
286  4.2169650342858e+02, 4.8696752516586e+02,
287  5.6234132519035e+02, 6.4938163157621e+02,
288  7.4989420933246e+02, 8.6596432336007e+02,
289  1.0000000000000e+03, 1.1547819846895e+03,
290  1.3335214321633e+03, 1.5399265260595e+03,
291  1.7782794100389e+03, 2.0535250264571e+03,
292  2.3713737056617e+03, 2.7384196342644e+03,
293  3.1622776601684e+03, 3.6517412725484e+03,
294  4.2169650342858e+03, 4.8696752516586e+03,
295  5.6234132519035e+03, 6.4938163157621e+03,
296  7.4989420933246e+03, 8.6596432336007e+03,
297  1.0000000000000e+04, 1.1547819846895e+04,
298  1.3335214321633e+04, 1.5399265260595e+04,
299  1.7782794100389e+04, 2.0535250264571e+04,
300  2.3713737056617e+04, 2.7384196342644e+04,
301  3.1622776601684e+04, 3.6517412725484e+04,
302  4.2169650342858e+04, 4.8696752516586e+04,
303  5.6234132519035e+04, 6.4938163157621e+04,
304  7.4989420933246e+04, 8.6596432336007e+04,
305  1.0000000000000e+05, 1.1547819846895e+05,
306  1.3335214321633e+05, 1.5399265260595e+05,
307  1.7782794100389e+05, 2.0535250264571e+05,
308  2.3713737056617e+05, 2.7384196342644e+05,
309  3.1622776601684e+05, 3.6517412725484e+05,
310  4.2169650342858e+05, 4.8696752516586e+05,
311  5.6234132519035e+05, 6.4938163157621e+05,
312  7.4989420933246e+05, 8.6596432336007e+05,
313 };
314 
315 /**
316  * decode exponents coded with VLC codes
317  */
318  static int decode_exp_vlc(WMACodecContext *s, int ch)
319 {
320  int last_exp, n, code;
321  const uint16_t *ptr;
322  float v, max_scale;
323  uint32_t *q, *q_end, iv;
324  const float *ptab = pow_tab + 60;
325  const uint32_t *iptab = (const uint32_t *) ptab;
326 
327  ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
328  q = (uint32_t *) s->exponents[ch];
329  q_end = q + s->block_len;
330  max_scale = 0;
331  if (s->version == 1) {
332  last_exp = get_bits(&s->gb, 5) + 10;
333  v = ptab[last_exp];
334  iv = iptab[last_exp];
335  max_scale = v;
336  n = *ptr++;
337  switch (n & 3) do {
338  case 0: *q++ = iv;
339  case 3: *q++ = iv;
340  case 2: *q++ = iv;
341  case 1: *q++ = iv;
342  } while ((n -= 4) > 0);
343  } else
344  last_exp = 36;
345 
346  while (q < q_end) {
347  code = get_vlc2(&s->gb, s->exp_vlc.table, EXPVLCBITS, EXPMAX);
348  if (code < 0) {
349  av_log(s->avctx, AV_LOG_ERROR, "Exponent vlc invalid\n");
350  return -1;
351  }
352  /* NOTE: this offset is the same as MPEG-4 AAC! */
353  last_exp += code - 60;
354  if ((unsigned) last_exp + 60 >= FF_ARRAY_ELEMS(pow_tab)) {
355  av_log(s->avctx, AV_LOG_ERROR, "Exponent out of range: %d\n",
356  last_exp);
357  return -1;
358  }
359  v = ptab[last_exp];
360  iv = iptab[last_exp];
361  if (v > max_scale)
362  max_scale = v;
363  n = *ptr++;
364  switch (n & 3) do {
365  case 0: *q++ = iv;
366  case 3: *q++ = iv;
367  case 2: *q++ = iv;
368  case 1: *q++ = iv;
369  } while ((n -= 4) > 0);
370  }
371  s->max_exponent[ch] = max_scale;
372  return 0;
373 }
374 
375 /**
376  * Apply MDCT window and add into output.
377  *
378  * We ensure that when the windows overlap their squared sum
379  * is always 1 (MDCT reconstruction rule).
380  */
381  static void wma_window(WMACodecContext *s, float *out)
382 {
383  float *in = s->output;
384  int block_len, bsize, n;
385 
386  /* left part */
387  if (s->block_len_bits <= s->prev_block_len_bits) {
388  block_len = s->block_len;
389  bsize = s->frame_len_bits - s->block_len_bits;
390 
391  s->fdsp->vector_fmul_add(out, in, s->windows[bsize],
392  out, block_len);
393  } else {
394  block_len = 1 << s->prev_block_len_bits;
395  n = (s->block_len - block_len) / 2;
396  bsize = s->frame_len_bits - s->prev_block_len_bits;
397 
398  s->fdsp->vector_fmul_add(out + n, in + n, s->windows[bsize],
399  out + n, block_len);
400 
401  memcpy(out + n + block_len, in + n + block_len, n * sizeof(float));
402  }
403 
404  out += s->block_len;
405  in += s->block_len;
406 
407  /* right part */
408  if (s->block_len_bits <= s->next_block_len_bits) {
409  block_len = s->block_len;
410  bsize = s->frame_len_bits - s->block_len_bits;
411 
412  s->fdsp->vector_fmul_reverse(out, in, s->windows[bsize], block_len);
413  } else {
414  block_len = 1 << s->next_block_len_bits;
415  n = (s->block_len - block_len) / 2;
416  bsize = s->frame_len_bits - s->next_block_len_bits;
417 
418  memcpy(out, in, n * sizeof(float));
419 
420  s->fdsp->vector_fmul_reverse(out + n, in + n, s->windows[bsize],
421  block_len);
422 
423  memset(out + n + block_len, 0, n * sizeof(float));
424  }
425 }
426 
427 /**
428  * @return 0 if OK. 1 if last block of frame. return -1 if
429  * unrecoverable error.
430  */
431  static int wma_decode_block(WMACodecContext *s)
432 {
433  int n, v, a, ch, bsize;
434  int coef_nb_bits, total_gain;
435  int nb_coefs[MAX_CHANNELS];
436  float mdct_norm;
437  FFTContext *mdct;
438 
439 #ifdef TRACE
440  ff_tlog(s->avctx, "***decode_block: %d:%d\n",
441  s->frame_count - 1, s->block_num);
442 #endif /* TRACE */
443 
444  /* compute current block length */
445  if (s->use_variable_block_len) {
446  n = av_log2(s->nb_block_sizes - 1) + 1;
447 
448  if (s->reset_block_lengths) {
449  s->reset_block_lengths = 0;
450  v = get_bits(&s->gb, n);
451  if (v >= s->nb_block_sizes) {
452  av_log(s->avctx, AV_LOG_ERROR,
453  "prev_block_len_bits %d out of range\n",
454  s->frame_len_bits - v);
455  return -1;
456  }
457  s->prev_block_len_bits = s->frame_len_bits - v;
458  v = get_bits(&s->gb, n);
459  if (v >= s->nb_block_sizes) {
460  av_log(s->avctx, AV_LOG_ERROR,
461  "block_len_bits %d out of range\n",
462  s->frame_len_bits - v);
463  return -1;
464  }
465  s->block_len_bits = s->frame_len_bits - v;
466  } else {
467  /* update block lengths */
468  s->prev_block_len_bits = s->block_len_bits;
469  s->block_len_bits = s->next_block_len_bits;
470  }
471  v = get_bits(&s->gb, n);
472  if (v >= s->nb_block_sizes) {
473  av_log(s->avctx, AV_LOG_ERROR,
474  "next_block_len_bits %d out of range\n",
475  s->frame_len_bits - v);
476  return -1;
477  }
478  s->next_block_len_bits = s->frame_len_bits - v;
479  } else {
480  /* fixed block len */
481  s->next_block_len_bits = s->frame_len_bits;
482  s->prev_block_len_bits = s->frame_len_bits;
483  s->block_len_bits = s->frame_len_bits;
484  }
485 
486  if (s->frame_len_bits - s->block_len_bits >= s->nb_block_sizes){
487  av_log(s->avctx, AV_LOG_ERROR, "block_len_bits not initialized to a valid value\n");
488  return -1;
489  }
490 
491  /* now check if the block length is coherent with the frame length */
492  s->block_len = 1 << s->block_len_bits;
493  if ((s->block_pos + s->block_len) > s->frame_len) {
494  av_log(s->avctx, AV_LOG_ERROR, "frame_len overflow\n");
495  return -1;
496  }
497 
498  if (s->avctx->channels == 2)
499  s->ms_stereo = get_bits1(&s->gb);
500  v = 0;
501  for (ch = 0; ch < s->avctx->channels; ch++) {
502  a = get_bits1(&s->gb);
503  s->channel_coded[ch] = a;
504  v |= a;
505  }
506 
507  bsize = s->frame_len_bits - s->block_len_bits;
508 
509  /* if no channel coded, no need to go further */
510  /* XXX: fix potential framing problems */
511  if (!v)
512  goto next;
513 
514  /* read total gain and extract corresponding number of bits for
515  * coef escape coding */
516  total_gain = 1;
517  for (;;) {
518  if (get_bits_left(&s->gb) < 7) {
519  av_log(s->avctx, AV_LOG_ERROR, "total_gain overread\n");
520  return AVERROR_INVALIDDATA;
521  }
522  a = get_bits(&s->gb, 7);
523  total_gain += a;
524  if (a != 127)
525  break;
526  }
527 
528  coef_nb_bits = ff_wma_total_gain_to_bits(total_gain);
529 
530  /* compute number of coefficients */
531  n = s->coefs_end[bsize] - s->coefs_start;
532  for (ch = 0; ch < s->avctx->channels; ch++)
533  nb_coefs[ch] = n;
534 
535  /* complex coding */
536  if (s->use_noise_coding) {
537  for (ch = 0; ch < s->avctx->channels; ch++) {
538  if (s->channel_coded[ch]) {
539  int i, n, a;
540  n = s->exponent_high_sizes[bsize];
541  for (i = 0; i < n; i++) {
542  a = get_bits1(&s->gb);
543  s->high_band_coded[ch][i] = a;
544  /* if noise coding, the coefficients are not transmitted */
545  if (a)
546  nb_coefs[ch] -= s->exponent_high_bands[bsize][i];
547  }
548  }
549  }
550  for (ch = 0; ch < s->avctx->channels; ch++) {
551  if (s->channel_coded[ch]) {
552  int i, n, val, code;
553 
554  n = s->exponent_high_sizes[bsize];
555  val = (int) 0x80000000;
556  for (i = 0; i < n; i++) {
557  if (s->high_band_coded[ch][i]) {
558  if (val == (int) 0x80000000) {
559  val = get_bits(&s->gb, 7) - 19;
560  } else {
561  code = get_vlc2(&s->gb, s->hgain_vlc.table,
562  HGAINVLCBITS, HGAINMAX);
563  if (code < 0) {
564  av_log(s->avctx, AV_LOG_ERROR,
565  "hgain vlc invalid\n");
566  return -1;
567  }
568  val += code - 18;
569  }
570  s->high_band_values[ch][i] = val;
571  }
572  }
573  }
574  }
575  }
576 
577  /* exponents can be reused in short blocks. */
578  if ((s->block_len_bits == s->frame_len_bits) || get_bits1(&s->gb)) {
579  for (ch = 0; ch < s->avctx->channels; ch++) {
580  if (s->channel_coded[ch]) {
581  if (s->use_exp_vlc) {
582  if (decode_exp_vlc(s, ch) < 0)
583  return -1;
584  } else {
585  decode_exp_lsp(s, ch);
586  }
587  s->exponents_bsize[ch] = bsize;
588  }
589  }
590  }
591 
592  /* parse spectral coefficients : just RLE encoding */
593  for (ch = 0; ch < s->avctx->channels; ch++) {
594  if (s->channel_coded[ch]) {
595  int tindex;
596  WMACoef *ptr = &s->coefs1[ch][0];
597 
598  /* special VLC tables are used for ms stereo because
599  * there is potentially less energy there */
600  tindex = (ch == 1 && s->ms_stereo);
601  memset(ptr, 0, s->block_len * sizeof(WMACoef));
602  ff_wma_run_level_decode(s->avctx, &s->gb, &s->coef_vlc[tindex],
603  s->level_table[tindex], s->run_table[tindex],
604  0, ptr, 0, nb_coefs[ch],
605  s->block_len, s->frame_len_bits, coef_nb_bits);
606  }
607  if (s->version == 1 && s->avctx->channels >= 2)
608  align_get_bits(&s->gb);
609  }
610 
611  /* normalize */
612  {
613  int n4 = s->block_len / 2;
614  mdct_norm = 1.0 / (float) n4;
615  if (s->version == 1)
616  mdct_norm *= sqrt(n4);
617  }
618 
619  /* finally compute the MDCT coefficients */
620  for (ch = 0; ch < s->avctx->channels; ch++) {
621  if (s->channel_coded[ch]) {
622  WMACoef *coefs1;
623  float *coefs, *exponents, mult, mult1, noise;
624  int i, j, n, n1, last_high_band, esize;
625  float exp_power[HIGH_BAND_MAX_SIZE];
626 
627  coefs1 = s->coefs1[ch];
628  exponents = s->exponents[ch];
629  esize = s->exponents_bsize[ch];
630  mult = ff_exp10(total_gain * 0.05) / s->max_exponent[ch];
631  mult *= mdct_norm;
632  coefs = s->coefs[ch];
633  if (s->use_noise_coding) {
634  mult1 = mult;
635  /* very low freqs : noise */
636  for (i = 0; i < s->coefs_start; i++) {
637  *coefs++ = s->noise_table[s->noise_index] *
638  exponents[i << bsize >> esize] * mult1;
639  s->noise_index = (s->noise_index + 1) &
640  (NOISE_TAB_SIZE - 1);
641  }
642 
643  n1 = s->exponent_high_sizes[bsize];
644 
645  /* compute power of high bands */
646  exponents = s->exponents[ch] +
647  (s->high_band_start[bsize] << bsize >> esize);
648  last_high_band = 0; /* avoid warning */
649  for (j = 0; j < n1; j++) {
650  n = s->exponent_high_bands[s->frame_len_bits -
651  s->block_len_bits][j];
652  if (s->high_band_coded[ch][j]) {
653  float e2, v;
654  e2 = 0;
655  for (i = 0; i < n; i++) {
656  v = exponents[i << bsize >> esize];
657  e2 += v * v;
658  }
659  exp_power[j] = e2 / n;
660  last_high_band = j;
661  ff_tlog(s->avctx, "%d: power=%f (%d)\n", j, exp_power[j], n);
662  }
663  exponents += n << bsize >> esize;
664  }
665 
666  /* main freqs and high freqs */
667  exponents = s->exponents[ch] + (s->coefs_start << bsize >> esize);
668  for (j = -1; j < n1; j++) {
669  if (j < 0)
670  n = s->high_band_start[bsize] - s->coefs_start;
671  else
672  n = s->exponent_high_bands[s->frame_len_bits -
673  s->block_len_bits][j];
674  if (j >= 0 && s->high_band_coded[ch][j]) {
675  /* use noise with specified power */
676  mult1 = sqrt(exp_power[j] / exp_power[last_high_band]);
677  /* XXX: use a table */
678  mult1 = mult1 * ff_exp10(s->high_band_values[ch][j] * 0.05);
679  mult1 = mult1 / (s->max_exponent[ch] * s->noise_mult);
680  mult1 *= mdct_norm;
681  for (i = 0; i < n; i++) {
682  noise = s->noise_table[s->noise_index];
683  s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1);
684  *coefs++ = noise * exponents[i << bsize >> esize] * mult1;
685  }
686  exponents += n << bsize >> esize;
687  } else {
688  /* coded values + small noise */
689  for (i = 0; i < n; i++) {
690  noise = s->noise_table[s->noise_index];
691  s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1);
692  *coefs++ = ((*coefs1++) + noise) *
693  exponents[i << bsize >> esize] * mult;
694  }
695  exponents += n << bsize >> esize;
696  }
697  }
698 
699  /* very high freqs : noise */
700  n = s->block_len - s->coefs_end[bsize];
701  mult1 = mult * exponents[(-(1 << bsize)) >> esize];
702  for (i = 0; i < n; i++) {
703  *coefs++ = s->noise_table[s->noise_index] * mult1;
704  s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1);
705  }
706  } else {
707  /* XXX: optimize more */
708  for (i = 0; i < s->coefs_start; i++)
709  *coefs++ = 0.0;
710  n = nb_coefs[ch];
711  for (i = 0; i < n; i++)
712  *coefs++ = coefs1[i] * exponents[i << bsize >> esize] * mult;
713  n = s->block_len - s->coefs_end[bsize];
714  for (i = 0; i < n; i++)
715  *coefs++ = 0.0;
716  }
717  }
718  }
719 
720 #ifdef TRACE
721  for (ch = 0; ch < s->avctx->channels; ch++) {
722  if (s->channel_coded[ch]) {
723  dump_floats(s, "exponents", 3, s->exponents[ch], s->block_len);
724  dump_floats(s, "coefs", 1, s->coefs[ch], s->block_len);
725  }
726  }
727 #endif /* TRACE */
728 
729  if (s->ms_stereo && s->channel_coded[1]) {
730  /* nominal case for ms stereo: we do it before mdct */
731  /* no need to optimize this case because it should almost
732  * never happen */
733  if (!s->channel_coded[0]) {
734  ff_tlog(s->avctx, "rare ms-stereo case happened\n");
735  memset(s->coefs[0], 0, sizeof(float) * s->block_len);
736  s->channel_coded[0] = 1;
737  }
738 
739  s->fdsp->butterflies_float(s->coefs[0], s->coefs[1], s->block_len);
740  }
741 
742 next:
743  mdct = &s->mdct_ctx[bsize];
744 
745  for (ch = 0; ch < s->avctx->channels; ch++) {
746  int n4, index;
747 
748  n4 = s->block_len / 2;
749  if (s->channel_coded[ch])
750  mdct->imdct_calc(mdct, s->output, s->coefs[ch]);
751  else if (!(s->ms_stereo && ch == 1))
752  memset(s->output, 0, sizeof(s->output));
753 
754  /* multiply by the window and add in the frame */
755  index = (s->frame_len / 2) + s->block_pos - n4;
756  wma_window(s, &s->frame_out[ch][index]);
757  }
758 
759  /* update block number */
760  s->block_num++;
761  s->block_pos += s->block_len;
762  if (s->block_pos >= s->frame_len)
763  return 1;
764  else
765  return 0;
766 }
767 
768 /* decode a frame of frame_len samples */
769  static int wma_decode_frame(WMACodecContext *s, float **samples,
770  int samples_offset)
771 {
772  int ret, ch;
773 
774 #ifdef TRACE
775  ff_tlog(s->avctx, "***decode_frame: %d size=%d\n",
776  s->frame_count++, s->frame_len);
777 #endif /* TRACE */
778 
779  /* read each block */
780  s->block_num = 0;
781  s->block_pos = 0;
782  for (;;) {
783  ret = wma_decode_block(s);
784  if (ret < 0)
785  return -1;
786  if (ret)
787  break;
788  }
789 
790  for (ch = 0; ch < s->avctx->channels; ch++) {
791  /* copy current block to output */
792  memcpy(samples[ch] + samples_offset, s->frame_out[ch],
793  s->frame_len * sizeof(*s->frame_out[ch]));
794  /* prepare for next block */
795  memmove(&s->frame_out[ch][0], &s->frame_out[ch][s->frame_len],
796  s->frame_len * sizeof(*s->frame_out[ch]));
797 
798 #ifdef TRACE
799  dump_floats(s, "samples", 6, samples[ch] + samples_offset,
800  s->frame_len);
801 #endif /* TRACE */
802  }
803 
804  return 0;
805 }
806 
807  static int wma_decode_superframe(AVCodecContext *avctx, void *data,
808  int *got_frame_ptr, AVPacket *avpkt)
809 {
810  AVFrame *frame = data;
811  const uint8_t *buf = avpkt->data;
812  int buf_size = avpkt->size;
813  WMACodecContext *s = avctx->priv_data;
814  int nb_frames, bit_offset, i, pos, len, ret;
815  uint8_t *q;
816  float **samples;
817  int samples_offset;
818 
819  ff_tlog(avctx, "***decode_superframe:\n");
820 
821  if (buf_size == 0) {
822  s->last_superframe_len = 0;
823  return 0;
824  }
825  if (buf_size < avctx->block_align) {
826  av_log(avctx, AV_LOG_ERROR,
827  "Input packet size too small (%d < %d)\n",
828  buf_size, avctx->block_align);
829  return AVERROR_INVALIDDATA;
830  }
831  if (avctx->block_align)
832  buf_size = avctx->block_align;
833 
834  init_get_bits(&s->gb, buf, buf_size * 8);
835 
836  if (s->use_bit_reservoir) {
837  /* read super frame header */
838  skip_bits(&s->gb, 4); /* super frame index */
839  nb_frames = get_bits(&s->gb, 4) - (s->last_superframe_len <= 0);
840  if (nb_frames <= 0) {
841  int is_error = nb_frames < 0 || get_bits_left(&s->gb) <= 8;
842  av_log(avctx, is_error ? AV_LOG_ERROR : AV_LOG_WARNING,
843  "nb_frames is %d bits left %d\n",
844  nb_frames, get_bits_left(&s->gb));
845  if (is_error)
846  return AVERROR_INVALIDDATA;
847 
848  if ((s->last_superframe_len + buf_size - 1) >
849  MAX_CODED_SUPERFRAME_SIZE)
850  goto fail;
851 
852  q = s->last_superframe + s->last_superframe_len;
853  len = buf_size - 1;
854  while (len > 0) {
855  *q++ = get_bits (&s->gb, 8);
856  len --;
857  }
858  memset(q, 0, AV_INPUT_BUFFER_PADDING_SIZE);
859 
860  s->last_superframe_len += 8*buf_size - 8;
861 // s->reset_block_lengths = 1; //XXX is this needed ?
862  *got_frame_ptr = 0;
863  return buf_size;
864  }
865  } else
866  nb_frames = 1;
867 
868  /* get output buffer */
869  frame->nb_samples = nb_frames * s->frame_len;
870  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
871  return ret;
872  samples = (float **) frame->extended_data;
873  samples_offset = 0;
874 
875  if (s->use_bit_reservoir) {
876  bit_offset = get_bits(&s->gb, s->byte_offset_bits + 3);
877  if (bit_offset > get_bits_left(&s->gb)) {
878  av_log(avctx, AV_LOG_ERROR,
879  "Invalid last frame bit offset %d > buf size %d (%d)\n",
880  bit_offset, get_bits_left(&s->gb), buf_size);
881  goto fail;
882  }
883 
884  if (s->last_superframe_len > 0) {
885  /* add bit_offset bits to last frame */
886  if ((s->last_superframe_len + ((bit_offset + 7) >> 3)) >
887  MAX_CODED_SUPERFRAME_SIZE)
888  goto fail;
889  q = s->last_superframe + s->last_superframe_len;
890  len = bit_offset;
891  while (len > 7) {
892  *q++ = (get_bits) (&s->gb, 8);
893  len -= 8;
894  }
895  if (len > 0)
896  *q++ = (get_bits) (&s->gb, len) << (8 - len);
897  memset(q, 0, AV_INPUT_BUFFER_PADDING_SIZE);
898 
899  /* XXX: bit_offset bits into last frame */
900  init_get_bits(&s->gb, s->last_superframe,
901  s->last_superframe_len * 8 + bit_offset);
902  /* skip unused bits */
903  if (s->last_bitoffset > 0)
904  skip_bits(&s->gb, s->last_bitoffset);
905  /* this frame is stored in the last superframe and in the
906  * current one */
907  if (wma_decode_frame(s, samples, samples_offset) < 0)
908  goto fail;
909  samples_offset += s->frame_len;
910  nb_frames--;
911  }
912 
913  /* read each frame starting from bit_offset */
914  pos = bit_offset + 4 + 4 + s->byte_offset_bits + 3;
915  if (pos >= MAX_CODED_SUPERFRAME_SIZE * 8 || pos > buf_size * 8)
916  return AVERROR_INVALIDDATA;
917  init_get_bits(&s->gb, buf + (pos >> 3), (buf_size - (pos >> 3)) * 8);
918  len = pos & 7;
919  if (len > 0)
920  skip_bits(&s->gb, len);
921 
922  s->reset_block_lengths = 1;
923  for (i = 0; i < nb_frames; i++) {
924  if (wma_decode_frame(s, samples, samples_offset) < 0)
925  goto fail;
926  samples_offset += s->frame_len;
927  }
928 
929  /* we copy the end of the frame in the last frame buffer */
930  pos = get_bits_count(&s->gb) +
931  ((bit_offset + 4 + 4 + s->byte_offset_bits + 3) & ~7);
932  s->last_bitoffset = pos & 7;
933  pos >>= 3;
934  len = buf_size - pos;
935  if (len > MAX_CODED_SUPERFRAME_SIZE || len < 0) {
936  av_log(s->avctx, AV_LOG_ERROR, "len %d invalid\n", len);
937  goto fail;
938  }
939  s->last_superframe_len = len;
940  memcpy(s->last_superframe, buf + pos, len);
941  } else {
942  /* single frame decode */
943  if (wma_decode_frame(s, samples, samples_offset) < 0)
944  goto fail;
945  samples_offset += s->frame_len;
946  }
947 
948  ff_dlog(s->avctx, "%d %d %d %d outbytes:%"PTRDIFF_SPECIFIER " eaten:%d\n",
949  s->frame_len_bits, s->block_len_bits, s->frame_len, s->block_len,
950  (int8_t *) samples - (int8_t *) data, avctx->block_align);
951 
952  *got_frame_ptr = 1;
953 
954  return buf_size;
955 
956 fail:
957  /* when error, we reset the bit reservoir */
958  s->last_superframe_len = 0;
959  return -1;
960 }
961 
962  static av_cold void flush(AVCodecContext *avctx)
963 {
964  WMACodecContext *s = avctx->priv_data;
965 
966  s->last_bitoffset =
967  s->last_superframe_len = 0;
968 }
969 
970 #if CONFIG_WMAV1_DECODER
971 AVCodec ff_wmav1_decoder = {
972  .name = "wmav1",
973  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"),
974  .type = AVMEDIA_TYPE_AUDIO,
975  .id = AV_CODEC_ID_WMAV1,
976  .priv_data_size = sizeof(WMACodecContext),
977  .init = wma_decode_init,
978  .close = ff_wma_end,
979  .decode = wma_decode_superframe,
980  .flush = flush,
981  .capabilities = AV_CODEC_CAP_DR1,
982  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
983  AV_SAMPLE_FMT_NONE },
984 };
985 #endif
986 #if CONFIG_WMAV2_DECODER
987 AVCodec ff_wmav2_decoder = {
988  .name = "wmav2",
989  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"),
990  .type = AVMEDIA_TYPE_AUDIO,
991  .id = AV_CODEC_ID_WMAV2,
992  .priv_data_size = sizeof(WMACodecContext),
993  .init = wma_decode_init,
994  .close = ff_wma_end,
995  .decode = wma_decode_superframe,
996  .flush = flush,
997  .capabilities = AV_CODEC_CAP_DR1,
998  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
999  AV_SAMPLE_FMT_NONE },
1000 };
1001 #endif
AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
ff_tlog
#define ff_tlog(ctx,...)
Definition: internal.h:75
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:1527
val
const char const char void * val
Definition: avisynth_c.h:771
s
const char * s
Definition: avisynth_c.h:768
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
wma_lsp_to_curve
static void wma_lsp_to_curve(WMACodecContext *s, float *out, float *val_max_ptr, int n, float *lsp)
NOTE: We use the same code as Vorbis here.
Definition: wmadec.c:187
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:269
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
WMACodecContext::next_block_len_bits
int next_block_len_bits
log2 of next block length
Definition: wma.h:105
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
pow_tab
static const float pow_tab[]
pow(10, i / 16.0) for i in -60..95
Definition: wmadec.c:234
AVPacket::size
int size
Definition: avcodec.h:1431
b
const char * b
Definition: vf_curves.c:113
AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
WMACodecContext::gb
GetBitContext gb
Definition: wma.h:69
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
ff_wma_run_level_decode
int ff_wma_run_level_decode(AVCodecContext *avctx, GetBitContext *gb, VLC *vlc, const float *level_table, const uint16_t *run_table, int version, WMACoef *ptr, int offset, int num_coefs, int block_len, int frame_len_bits, int coef_nb_bits)
Decode run level compressed coefficients.
Definition: wma.c:428
WMACodecContext::block_len
int block_len
block length in samples
Definition: wma.h:107
AVFloatDSPContext::vector_fmul_reverse
void(* vector_fmul_reverse)(float *dst, const float *src0, const float *src1, int len)
Calculate the entry wise product of two vectors of floats, and store the result in a vector of floats...
Definition: float_dsp.h:154
WMACodecContext::exponents
float exponents[MAX_CHANNELS][BLOCK_MAX_SIZE]
Definition: wma.h:113
AVCodec
AVCodec.
Definition: avcodec.h:3408
wma_window
static void wma_window(WMACodecContext *s, float *out)
Apply MDCT window and add into output.
Definition: wmadec.c:381
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
AVCodecContext::block_align
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2210
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
NOISE_TAB_SIZE
#define NOISE_TAB_SIZE
Definition: wma.h:49
WMACodecContext::lsp_pow_m_table2
float lsp_pow_m_table2[(1<< LSP_POW_BITS)]
Definition: wma.h:133
attributes.h
Macro definitions for various function/variable attributes.
wma_decode_block
static int wma_decode_block(WMACodecContext *s)
Definition: wmadec.c:431
WMACodecContext::lsp_cos_table
float lsp_cos_table[BLOCK_MAX_SIZE]
Definition: wma.h:130
WMACodecContext::high_band_start
int high_band_start[BLOCK_NB_SIZES]
index of first coef in high band
Definition: wma.h:80
HGAINVLCBITS
#define HGAINVLCBITS
Definition: wmadec.c:46
AVCodecContext::sample_fmt
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2181
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
WMACoef
float WMACoef
type for decoded coefficients, int16_t would be enough for wma 1/2
Definition: wma.h:57
ff_aac_scalefactor_bits
const uint8_t ff_aac_scalefactor_bits[121]
Definition: aactab.c:92
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1618
WMACodecContext::block_pos
int block_pos
current position in frame
Definition: wma.h:109
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:344
decode_exp_vlc
static int decode_exp_vlc(WMACodecContext *s, int ch)
decode exponents coded with VLC codes
Definition: wmadec.c:318
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
AVPacket::data
uint8_t * data
Definition: avcodec.h:1430
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:200
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
WMACodecContext::lsp_pow_m_table1
float lsp_pow_m_table1[(1<< LSP_POW_BITS)]
Definition: wma.h:132
EXPMAX
#define EXPMAX
Definition: wmadec.c:44
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
WMACodecContext::reset_block_lengths
int reset_block_lengths
Definition: wma.h:103
WMACodecContext::nb_block_sizes
int nb_block_sizes
number of block sizes
Definition: wma.h:101
ff_wma_total_gain_to_bits
int ff_wma_total_gain_to_bits(int total_gain)
Definition: wma.c:354
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:596
AVCodec::id
enum AVCodecID id
Definition: avcodec.h:3422
pow_m1_4
static float pow_m1_4(WMACodecContext *s, float x)
compute x^-0.25 with an exponent and mantissa table.
Definition: wmadec.c:136
ff_exp10
static av_always_inline double ff_exp10(double x)
Compute 10^x for floating point values.
Definition: ffmath.h:42
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
PTRDIFF_SPECIFIER
#define PTRDIFF_SPECIFIER
Definition: internal.h:261
init_vlc
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: vlc.h:38
AVERROR
#define AVERROR(e)
Definition: error.h:43
WMACodecContext::exponent_bands
uint16_t exponent_bands[BLOCK_NB_SIZES][25]
Definition: wma.h:79
WMACodecContext::channel_coded
uint8_t channel_coded[MAX_CHANNELS]
true if channel is coded
Definition: wma.h:111
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AVFloatDSPContext::butterflies_float
void(* butterflies_float)(float *av_restrict v1, float *av_restrict v2, int len)
Calculate the sum and difference of two vectors of floats.
Definition: float_dsp.h:164
WMACodecContext::last_superframe
uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE+AV_INPUT_BUFFER_PADDING_SIZE]
Definition: wma.h:123
WMACodecContext::last_superframe_len
int last_superframe_len
Definition: wma.h:125
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3415
wma_decode_superframe
static int wma_decode_superframe(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: wmadec.c:807
WMACodecContext::output
FFTSample output[BLOCK_MAX_SIZE *2]
Definition: wma.h:117
ff_mdct_init
#define ff_mdct_init
Definition: fft.h:169
ff_wma_hgain_huffbits
const uint8_t ff_wma_hgain_huffbits[37]
Definition: wmadata.h:62
WMACodecContext::noise_index
int noise_index
Definition: wma.h:127
fail
#define fail()
Definition: checkasm.h:116
wma_decode_init
static av_cold int wma_decode_init(AVCodecContext *avctx)
Definition: wmadec.c:70
FFTContext::imdct_calc
void(* imdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:107
WMACodecContext::exponent_high_bands
int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]
Definition: wma.h:84
ff_wma_end
int ff_wma_end(AVCodecContext *avctx)
Definition: wma.c:368
WMACodecContext::high_band_values
int high_band_values[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]
Definition: wma.h:89
WMACodecContext::fdsp
AVFloatDSPContext * fdsp
Definition: wma.h:134
FFTContext
Definition: fft.h:88
mult
static int16_t mult(Float11 *f1, Float11 *f2)
Definition: g726.c:55
WMACodecContext::use_bit_reservoir
int use_bit_reservoir
Definition: wma.h:72
MAX_CODED_SUPERFRAME_SIZE
#define MAX_CODED_SUPERFRAME_SIZE
Definition: wma.h:45
w
uint8_t w
Definition: llviddspenc.c:38
ff_wma_init
av_cold int ff_wma_init(AVCodecContext *avctx, int flags2)
Definition: wma.c:81
WMACodecContext::run_table
uint16_t * run_table[2]
Definition: wma.h:94
ff_wma_hgain_huffcodes
const uint16_t ff_wma_hgain_huffcodes[37]
Definition: wmadata.h:54
WMACodecContext::version
int version
1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2)
Definition: wma.h:71
get_vlc2
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:563
n
int n
Definition: avisynth_c.h:684
WMACodecContext::frame_len
int frame_len
frame length in samples
Definition: wma.h:99
AV_CODEC_ID_WMAV1
Definition: avcodec.h:558
ff_wmav2_decoder
AVCodec ff_wmav2_decoder
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
WMACodecContext::last_bitoffset
int last_bitoffset
Definition: wma.h:124
flush
static av_cold void flush(AVCodecContext *avctx)
Definition: wmadec.c:962
exp2f
#define exp2f(x)
Definition: libm.h:293
WMACodecContext::frame_len_bits
int frame_len_bits
frame_len = 1 << frame_len_bits
Definition: wma.h:100
avcodec.h
Libavcodec external API header.
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
wma_decode_frame
static int wma_decode_frame(WMACodecContext *s, float **samples, int samples_offset)
Definition: wmadec.c:769
HIGH_BAND_MAX_SIZE
#define HIGH_BAND_MAX_SIZE
Definition: wma.h:40
WMACodecContext::use_exp_vlc
int use_exp_vlc
exponent coding: 0 = lsp, 1 = vlc + delta
Definition: wma.h:74
WMACodecContext::coef_vlc
VLC coef_vlc[2]
Definition: wma.h:93
NB_LSP_COEFS
#define NB_LSP_COEFS
Definition: wma.h:42
AVCodecContext
main external API structure.
Definition: avcodec.h:1518
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1891
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
Definition: audio_convert.c:194
wma_lsp_to_curve_init
static void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len)
Definition: wmadec.c:155
WMACodecContext::avctx
AVCodecContext * avctx
Definition: wma.h:68
buf
void * buf
Definition: avisynth_c.h:690
WMACodecContext::frame_out
float frame_out[MAX_CHANNELS][BLOCK_MAX_SIZE *2]
Definition: wma.h:121
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1619
WMACodecContext::exponent_high_sizes
int exponent_high_sizes[BLOCK_NB_SIZES]
Definition: wma.h:83
AVFloatDSPContext::vector_fmul_add
void(* vector_fmul_add)(float *dst, const float *src0, const float *src1, const float *src2, int len)
Calculate the entry wise product of two vectors of floats, add a third vector of floats and store the...
Definition: float_dsp.h:137
decode_exp_lsp
static void decode_exp_lsp(WMACodecContext *s, int ch)
decode exponents coded with LSP coefficients (same idea as Vorbis)
Definition: wmadec.c:216
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:321
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:314
index
int index
Definition: gxfenc.c:89
WMACodecContext::block_num
int block_num
block number in current frame
Definition: wma.h:108
WMACodecContext::use_noise_coding
int use_noise_coding
true if perceptual noise is added
Definition: wma.h:75
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:433
WMACodecContext::level_table
float * level_table[2]
Definition: wma.h:95
LSP_POW_BITS
#define LSP_POW_BITS
Definition: wma.h:51
MAX_CHANNELS
#define MAX_CHANNELS
Definition: aac.h:47
WMACodecContext::use_variable_block_len
int use_variable_block_len
Definition: wma.h:73
WMACodecContext::ms_stereo
uint8_t ms_stereo
true if mid/side stereo mode
Definition: wma.h:110
WMACodecContext::exp_vlc
VLC exp_vlc
Definition: wma.h:77
WMACodecContext::mdct_ctx
FFTContext mdct_ctx[BLOCK_NB_SIZES]
Definition: wma.h:118
ff_aac_scalefactor_code
const uint32_t ff_aac_scalefactor_code[121]
Definition: aactab.c:73
WMACodecContext::exponents_bsize
int exponents_bsize[MAX_CHANNELS]
log2 ratio frame/exp. length
Definition: wma.h:112
noise
static int noise(AVBSFContext *ctx, AVPacket *pkt)
Definition: noise_bsf.c:38
WMACodecContext::coefs
float coefs[MAX_CHANNELS][BLOCK_MAX_SIZE]
Definition: wma.h:116
WMACodecContext::prev_block_len_bits
int prev_block_len_bits
log2 of prev block length
Definition: wma.h:106
WMACodecContext::coefs_end
int coefs_end[BLOCK_NB_SIZES]
max number of coded coefficients
Definition: wma.h:82
ffmath.h
internal math functions header
int
int
Definition: ffmpeg_filter.c:190
WMACodecContext::lsp_pow_e_table
float lsp_pow_e_table[256]
Definition: wma.h:131
ff_wma_lsp_codebook
const float ff_wma_lsp_codebook[NB_LSP_COEFS][16]
Definition: wmadata.h:68
internal.h
common internal api header.
if
if(ret< 0)
Definition: vf_mcdeint.c:279
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:773
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1545
len
int len
Definition: vorbis_enc_data.h:452
AVCodecContext::channels
int channels
number of audio channels
Definition: avcodec.h:2174
VLC::table
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
EXPVLCBITS
#define EXPVLCBITS
Definition: wmadec.c:43
AV_CODEC_ID_WMAV2
Definition: avcodec.h:559
WMACodecContext::coefs1
WMACoef coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE]
Definition: wma.h:115
align_get_bits
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:472
HGAINMAX
#define HGAINMAX
Definition: wmadec.c:47
tab
static const struct twinvq_data tab
Definition: twinvq_data.h:11135
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
WMACodecContext::max_exponent
float max_exponent[MAX_CHANNELS]
Definition: wma.h:114
out
FILE * out
Definition: movenc.c:54
WMACodecContext::hgain_vlc
VLC hgain_vlc
Definition: wma.h:85
WMACodecContext::coefs_start
int coefs_start
first coded coef
Definition: wma.h:81
M_PI
#define M_PI
Definition: mathematics.h:52
WMACodecContext::block_len_bits
int block_len_bits
log2 of current block length
Definition: wma.h:104
WMACodecContext::byte_offset_bits
int byte_offset_bits
Definition: wma.h:76
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:265
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1407
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:284
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:959
WMACodecContext::high_band_coded
int high_band_coded[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]
Definition: wma.h:88
ch
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(constuint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(constint16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(constint32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(constint64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(constfloat *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(constdouble *) pi *(INT64_C(1)<< 63)))#defineFMT_PAIR_FUNC(out, in) staticconv_func_type *constfmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};staticvoidcpy1(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, len);}staticvoidcpy2(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 2 *len);}staticvoidcpy4(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 4 *len);}staticvoidcpy8(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, constint *ch_map, intflags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) returnNULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) returnNULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case1:ctx->simd_f=cpy1;break;case2:ctx->simd_f=cpy2;break;case4:ctx->simd_f=cpy4;break;case8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);returnctx;}voidswri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}intswri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, intlen){intch;intoff=0;constintos=(out->planar?1:out->ch_count)*out->bps;unsignedmisaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){intplanes=in->planar?in->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){intplanes=out->planar?out->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){intplanes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
WMACodecContext::noise_table
float noise_table[NOISE_TAB_SIZE]
Definition: wma.h:126
a
a
Definition: h264pred_template.c:468
name
const char * name
Definition: opengl_enc.c:103
ff_wmav1_decoder
AVCodec ff_wmav1_decoder
WMACodecContext::noise_mult
float noise_mult
Definition: wma.h:128
WMACodecContext::windows
const float * windows[BLOCK_NB_SIZES]
Definition: wma.h:119
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