FFmpeg  1.2.12
wmaprodec.c
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1 /*
2  * Wmapro compatible decoder
3  * Copyright (c) 2007 Baptiste Coudurier, Benjamin Larsson, Ulion
4  * Copyright (c) 2008 - 2011 Sascha Sommer, Benjamin Larsson
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
89 #include "libavutil/float_dsp.h"
90 #include "libavutil/intfloat.h"
91 #include "libavutil/intreadwrite.h"
92 #include "avcodec.h"
93 #include "internal.h"
94 #include "get_bits.h"
95 #include "put_bits.h"
96 #include "wmaprodata.h"
97 #include "sinewin.h"
98 #include "wma.h"
99 #include "wma_common.h"
100 
102 #define WMAPRO_MAX_CHANNELS 8
103 #define MAX_SUBFRAMES 32
104 #define MAX_BANDS 29
105 #define MAX_FRAMESIZE 32768
106 
107 #define WMAPRO_BLOCK_MIN_BITS 6
108 #define WMAPRO_BLOCK_MAX_BITS 13
109 #define WMAPRO_BLOCK_MAX_SIZE (1 << WMAPRO_BLOCK_MAX_BITS)
110 #define WMAPRO_BLOCK_SIZES (WMAPRO_BLOCK_MAX_BITS - WMAPRO_BLOCK_MIN_BITS + 1)
111 
112 
113 #define VLCBITS 9
114 #define SCALEVLCBITS 8
115 #define VEC4MAXDEPTH ((HUFF_VEC4_MAXBITS+VLCBITS-1)/VLCBITS)
116 #define VEC2MAXDEPTH ((HUFF_VEC2_MAXBITS+VLCBITS-1)/VLCBITS)
117 #define VEC1MAXDEPTH ((HUFF_VEC1_MAXBITS+VLCBITS-1)/VLCBITS)
118 #define SCALEMAXDEPTH ((HUFF_SCALE_MAXBITS+SCALEVLCBITS-1)/SCALEVLCBITS)
119 #define SCALERLMAXDEPTH ((HUFF_SCALE_RL_MAXBITS+VLCBITS-1)/VLCBITS)
120 
121 static VLC sf_vlc;
122 static VLC sf_rl_vlc;
123 static VLC vec4_vlc;
124 static VLC vec2_vlc;
125 static VLC vec1_vlc;
126 static VLC coef_vlc[2];
127 static float sin64[33];
128 
132 typedef struct {
133  int16_t prev_block_len;
136  uint16_t subframe_len[MAX_SUBFRAMES];
137  uint16_t subframe_offset[MAX_SUBFRAMES];
139  uint16_t decoded_samples;
142  int8_t reuse_sf;
145  int saved_scale_factors[2][MAX_BANDS];
149  float* coeffs;
150  uint16_t num_vec_coeffs;
153 
157 typedef struct {
159  int8_t transform;
160  int8_t transform_band[MAX_BANDS];
161  float decorrelation_matrix[WMAPRO_MAX_CHANNELS*WMAPRO_MAX_CHANNELS];
162  float* channel_data[WMAPRO_MAX_CHANNELS];
164 
168 typedef struct WMAProDecodeCtx {
169  /* generic decoder variables */
178 
179  /* frame size dependent frame information (set during initialization) */
180  uint32_t decode_flags;
184  uint16_t samples_per_frame;
185  uint16_t log2_frame_size;
186  int8_t lfe_channel;
195 
196  /* packet decode state */
206 
207  /* frame decode state */
208  uint32_t frame_num;
212  int8_t skip_frame;
214 
215  /* subframe/block decode state */
216  int16_t subframe_len;
219  int8_t num_bands;
221  int16_t* cur_sfb_offsets;
223  int8_t esc_len;
224 
227 
230 
231 
237 {
238 #define PRINT(a, b) av_log(s->avctx, AV_LOG_DEBUG, " %s = %d\n", a, b);
239 #define PRINT_HEX(a, b) av_log(s->avctx, AV_LOG_DEBUG, " %s = %x\n", a, b);
240 
241  PRINT("ed sample bit depth", s->bits_per_sample);
242  PRINT_HEX("ed decode flags", s->decode_flags);
243  PRINT("samples per frame", s->samples_per_frame);
244  PRINT("log2 frame size", s->log2_frame_size);
245  PRINT("max num subframes", s->max_num_subframes);
246  PRINT("len prefix", s->len_prefix);
247  PRINT("num channels", s->avctx->channels);
248 }
249 
256 {
257  WMAProDecodeCtx *s = avctx->priv_data;
258  int i;
259 
260  for (i = 0; i < WMAPRO_BLOCK_SIZES; i++)
261  ff_mdct_end(&s->mdct_ctx[i]);
262 
263  return 0;
264 }
265 
272 {
273  WMAProDecodeCtx *s = avctx->priv_data;
274  uint8_t *edata_ptr = avctx->extradata;
275  unsigned int channel_mask;
276  int i, bits;
277  int log2_max_num_subframes;
278  int num_possible_block_sizes;
279 
280  s->avctx = avctx;
282 
284 
286 
287  if (avctx->extradata_size >= 18) {
288  s->decode_flags = AV_RL16(edata_ptr+14);
289  channel_mask = AV_RL32(edata_ptr+2);
290  s->bits_per_sample = AV_RL16(edata_ptr);
292  for (i = 0; i < avctx->extradata_size; i++)
293  av_dlog(avctx, "[%x] ", avctx->extradata[i]);
294  av_dlog(avctx, "\n");
295 
296  } else {
297  av_log_ask_for_sample(avctx, "Unknown extradata size\n");
298  return AVERROR_PATCHWELCOME;
299  }
300 
302  s->log2_frame_size = av_log2(avctx->block_align) + 4;
303 
305  s->skip_frame = 1; /* skip first frame */
306  s->packet_loss = 1;
307  s->len_prefix = (s->decode_flags & 0x40);
308 
310  bits = ff_wma_get_frame_len_bits(avctx->sample_rate, 3, s->decode_flags);
311  if (bits > WMAPRO_BLOCK_MAX_BITS) {
312  av_log_missing_feature(avctx, "14-bits block sizes", 1);
313  return AVERROR_PATCHWELCOME;
314  }
315  s->samples_per_frame = 1 << bits;
316 
318  log2_max_num_subframes = ((s->decode_flags & 0x38) >> 3);
319  s->max_num_subframes = 1 << log2_max_num_subframes;
320  if (s->max_num_subframes == 16 || s->max_num_subframes == 4)
321  s->max_subframe_len_bit = 1;
322  s->subframe_len_bits = av_log2(log2_max_num_subframes) + 1;
323 
324  num_possible_block_sizes = log2_max_num_subframes + 1;
326  s->dynamic_range_compression = (s->decode_flags & 0x80);
327 
328  if (s->max_num_subframes > MAX_SUBFRAMES) {
329  av_log(avctx, AV_LOG_ERROR, "invalid number of subframes %i\n",
330  s->max_num_subframes);
331  return AVERROR_INVALIDDATA;
332  }
333 
335  av_log(avctx, AV_LOG_ERROR, "min_samples_per_subframe of %d too small\n",
337  return AVERROR_INVALIDDATA;
338  }
339 
340  if (s->avctx->sample_rate <= 0) {
341  av_log(avctx, AV_LOG_ERROR, "invalid sample rate\n");
342  return AVERROR_INVALIDDATA;
343  }
344 
345  if (avctx->channels < 0) {
346  av_log(avctx, AV_LOG_ERROR, "invalid number of channels %d\n",
347  avctx->channels);
348  return AVERROR_INVALIDDATA;
349  } else if (avctx->channels > WMAPRO_MAX_CHANNELS) {
350  av_log_ask_for_sample(avctx, "unsupported number of channels\n");
351  return AVERROR_PATCHWELCOME;
352  }
353 
355  for (i = 0; i < avctx->channels; i++)
357 
359  s->lfe_channel = -1;
360 
361  if (channel_mask & 8) {
362  unsigned int mask;
363  for (mask = 1; mask < 16; mask <<= 1) {
364  if (channel_mask & mask)
365  ++s->lfe_channel;
366  }
367  }
368 
370  scale_huffbits, 1, 1,
371  scale_huffcodes, 2, 2, 616);
372 
374  scale_rl_huffbits, 1, 1,
375  scale_rl_huffcodes, 4, 4, 1406);
376 
377  INIT_VLC_STATIC(&coef_vlc[0], VLCBITS, HUFF_COEF0_SIZE,
378  coef0_huffbits, 1, 1,
379  coef0_huffcodes, 4, 4, 2108);
380 
381  INIT_VLC_STATIC(&coef_vlc[1], VLCBITS, HUFF_COEF1_SIZE,
382  coef1_huffbits, 1, 1,
383  coef1_huffcodes, 4, 4, 3912);
384 
386  vec4_huffbits, 1, 1,
387  vec4_huffcodes, 2, 2, 604);
388 
390  vec2_huffbits, 1, 1,
391  vec2_huffcodes, 2, 2, 562);
392 
394  vec1_huffbits, 1, 1,
395  vec1_huffcodes, 2, 2, 562);
396 
399  for (i = 0; i < num_possible_block_sizes; i++) {
400  int subframe_len = s->samples_per_frame >> i;
401  int x;
402  int band = 1;
403 
404  s->sfb_offsets[i][0] = 0;
405 
406  for (x = 0; x < MAX_BANDS-1 && s->sfb_offsets[i][band - 1] < subframe_len; x++) {
407  int offset = (subframe_len * 2 * critical_freq[x])
408  / s->avctx->sample_rate + 2;
409  offset &= ~3;
410  if (offset > s->sfb_offsets[i][band - 1])
411  s->sfb_offsets[i][band++] = offset;
412 
413  if (offset >= subframe_len)
414  break;
415  }
416  s->sfb_offsets[i][band - 1] = subframe_len;
417  s->num_sfb[i] = band - 1;
418  if (s->num_sfb[i] <= 0) {
419  av_log(avctx, AV_LOG_ERROR, "num_sfb invalid\n");
420  return AVERROR_INVALIDDATA;
421  }
422  }
423 
424 
430  for (i = 0; i < num_possible_block_sizes; i++) {
431  int b;
432  for (b = 0; b < s->num_sfb[i]; b++) {
433  int x;
434  int offset = ((s->sfb_offsets[i][b]
435  + s->sfb_offsets[i][b + 1] - 1) << i) >> 1;
436  for (x = 0; x < num_possible_block_sizes; x++) {
437  int v = 0;
438  while (s->sfb_offsets[x][v + 1] << x < offset)
439  ++v;
440  s->sf_offsets[i][x][b] = v;
441  }
442  }
443  }
444 
446  for (i = 0; i < WMAPRO_BLOCK_SIZES; i++)
448  1.0 / (1 << (WMAPRO_BLOCK_MIN_BITS + i - 1))
449  / (1 << (s->bits_per_sample - 1)));
450 
452  for (i = 0; i < WMAPRO_BLOCK_SIZES; i++) {
453  const int win_idx = WMAPRO_BLOCK_MAX_BITS - i;
454  ff_init_ff_sine_windows(win_idx);
455  s->windows[WMAPRO_BLOCK_SIZES - i - 1] = ff_sine_windows[win_idx];
456  }
457 
459  for (i = 0; i < num_possible_block_sizes; i++) {
460  int block_size = s->samples_per_frame >> i;
461  int cutoff = (440*block_size + 3 * (s->avctx->sample_rate >> 1) - 1)
462  / s->avctx->sample_rate;
463  s->subwoofer_cutoffs[i] = av_clip(cutoff, 4, block_size);
464  }
465 
467  for (i = 0; i < 33; i++)
468  sin64[i] = sin(i*M_PI / 64.0);
469 
470  if (avctx->debug & FF_DEBUG_BITSTREAM)
471  dump_context(s);
472 
473  avctx->channel_layout = channel_mask;
474 
475  return 0;
476 }
477 
485 {
486  int frame_len_shift = 0;
487  int subframe_len;
488 
490  if (offset == s->samples_per_frame - s->min_samples_per_subframe)
491  return s->min_samples_per_subframe;
492 
494  if (s->max_subframe_len_bit) {
495  if (get_bits1(&s->gb))
496  frame_len_shift = 1 + get_bits(&s->gb, s->subframe_len_bits-1);
497  } else
498  frame_len_shift = get_bits(&s->gb, s->subframe_len_bits);
499 
500  subframe_len = s->samples_per_frame >> frame_len_shift;
501 
503  if (subframe_len < s->min_samples_per_subframe ||
504  subframe_len > s->samples_per_frame) {
505  av_log(s->avctx, AV_LOG_ERROR, "broken frame: subframe_len %i\n",
506  subframe_len);
507  return AVERROR_INVALIDDATA;
508  }
509  return subframe_len;
510 }
511 
533 {
534  uint16_t num_samples[WMAPRO_MAX_CHANNELS] = { 0 };
535  uint8_t contains_subframe[WMAPRO_MAX_CHANNELS];
536  int channels_for_cur_subframe = s->avctx->channels;
537  int fixed_channel_layout = 0;
538  int min_channel_len = 0;
539  int c;
540 
541  /* Should never consume more than 3073 bits (256 iterations for the
542  * while loop when always the minimum amount of 128 samples is subtracted
543  * from missing samples in the 8 channel case).
544  * 1 + BLOCK_MAX_SIZE * MAX_CHANNELS / BLOCK_MIN_SIZE * (MAX_CHANNELS + 4)
545  */
546 
548  for (c = 0; c < s->avctx->channels; c++)
549  s->channel[c].num_subframes = 0;
550 
551  if (s->max_num_subframes == 1 || get_bits1(&s->gb))
552  fixed_channel_layout = 1;
553 
555  do {
556  int subframe_len;
557 
559  for (c = 0; c < s->avctx->channels; c++) {
560  if (num_samples[c] == min_channel_len) {
561  if (fixed_channel_layout || channels_for_cur_subframe == 1 ||
562  (min_channel_len == s->samples_per_frame - s->min_samples_per_subframe))
563  contains_subframe[c] = 1;
564  else
565  contains_subframe[c] = get_bits1(&s->gb);
566  } else
567  contains_subframe[c] = 0;
568  }
569 
571  if ((subframe_len = decode_subframe_length(s, min_channel_len)) <= 0)
572  return AVERROR_INVALIDDATA;
573 
575  min_channel_len += subframe_len;
576  for (c = 0; c < s->avctx->channels; c++) {
577  WMAProChannelCtx* chan = &s->channel[c];
578 
579  if (contains_subframe[c]) {
580  if (chan->num_subframes >= MAX_SUBFRAMES) {
582  "broken frame: num subframes > 31\n");
583  return AVERROR_INVALIDDATA;
584  }
585  chan->subframe_len[chan->num_subframes] = subframe_len;
586  num_samples[c] += subframe_len;
587  ++chan->num_subframes;
588  if (num_samples[c] > s->samples_per_frame) {
589  av_log(s->avctx, AV_LOG_ERROR, "broken frame: "
590  "channel len > samples_per_frame\n");
591  return AVERROR_INVALIDDATA;
592  }
593  } else if (num_samples[c] <= min_channel_len) {
594  if (num_samples[c] < min_channel_len) {
595  channels_for_cur_subframe = 0;
596  min_channel_len = num_samples[c];
597  }
598  ++channels_for_cur_subframe;
599  }
600  }
601  } while (min_channel_len < s->samples_per_frame);
602 
603  for (c = 0; c < s->avctx->channels; c++) {
604  int i;
605  int offset = 0;
606  for (i = 0; i < s->channel[c].num_subframes; i++) {
607  av_dlog(s->avctx, "frame[%i] channel[%i] subframe[%i]"
608  " len %i\n", s->frame_num, c, i,
609  s->channel[c].subframe_len[i]);
610  s->channel[c].subframe_offset[i] = offset;
611  offset += s->channel[c].subframe_len[i];
612  }
613  }
614 
615  return 0;
616 }
617 
624  WMAProChannelGrp *chgroup)
625 {
626  int i;
627  int offset = 0;
628  int8_t rotation_offset[WMAPRO_MAX_CHANNELS * WMAPRO_MAX_CHANNELS];
629  memset(chgroup->decorrelation_matrix, 0, s->avctx->channels *
630  s->avctx->channels * sizeof(*chgroup->decorrelation_matrix));
631 
632  for (i = 0; i < chgroup->num_channels * (chgroup->num_channels - 1) >> 1; i++)
633  rotation_offset[i] = get_bits(&s->gb, 6);
634 
635  for (i = 0; i < chgroup->num_channels; i++)
636  chgroup->decorrelation_matrix[chgroup->num_channels * i + i] =
637  get_bits1(&s->gb) ? 1.0 : -1.0;
638 
639  for (i = 1; i < chgroup->num_channels; i++) {
640  int x;
641  for (x = 0; x < i; x++) {
642  int y;
643  for (y = 0; y < i + 1; y++) {
644  float v1 = chgroup->decorrelation_matrix[x * chgroup->num_channels + y];
645  float v2 = chgroup->decorrelation_matrix[i * chgroup->num_channels + y];
646  int n = rotation_offset[offset + x];
647  float sinv;
648  float cosv;
649 
650  if (n < 32) {
651  sinv = sin64[n];
652  cosv = sin64[32 - n];
653  } else {
654  sinv = sin64[64 - n];
655  cosv = -sin64[n - 32];
656  }
657 
658  chgroup->decorrelation_matrix[y + x * chgroup->num_channels] =
659  (v1 * sinv) - (v2 * cosv);
660  chgroup->decorrelation_matrix[y + i * chgroup->num_channels] =
661  (v1 * cosv) + (v2 * sinv);
662  }
663  }
664  offset += i;
665  }
666 }
667 
674 {
675  int i;
676  /* should never consume more than 1921 bits for the 8 channel case
677  * 1 + MAX_CHANNELS * (MAX_CHANNELS + 2 + 3 * MAX_CHANNELS * MAX_CHANNELS
678  * + MAX_CHANNELS + MAX_BANDS + 1)
679  */
680 
682  s->num_chgroups = 0;
683  if (s->avctx->channels > 1) {
684  int remaining_channels = s->channels_for_cur_subframe;
685 
686  if (get_bits1(&s->gb)) {
688  "unsupported channel transform bit\n");
689  return AVERROR_PATCHWELCOME;
690  }
691 
692  for (s->num_chgroups = 0; remaining_channels &&
694  WMAProChannelGrp* chgroup = &s->chgroup[s->num_chgroups];
695  float** channel_data = chgroup->channel_data;
696  chgroup->num_channels = 0;
697  chgroup->transform = 0;
698 
700  if (remaining_channels > 2) {
701  for (i = 0; i < s->channels_for_cur_subframe; i++) {
702  int channel_idx = s->channel_indexes_for_cur_subframe[i];
703  if (!s->channel[channel_idx].grouped
704  && get_bits1(&s->gb)) {
705  ++chgroup->num_channels;
706  s->channel[channel_idx].grouped = 1;
707  *channel_data++ = s->channel[channel_idx].coeffs;
708  }
709  }
710  } else {
711  chgroup->num_channels = remaining_channels;
712  for (i = 0; i < s->channels_for_cur_subframe; i++) {
713  int channel_idx = s->channel_indexes_for_cur_subframe[i];
714  if (!s->channel[channel_idx].grouped)
715  *channel_data++ = s->channel[channel_idx].coeffs;
716  s->channel[channel_idx].grouped = 1;
717  }
718  }
719 
721  if (chgroup->num_channels == 2) {
722  if (get_bits1(&s->gb)) {
723  if (get_bits1(&s->gb)) {
725  "unsupported channel transform type\n");
726  }
727  } else {
728  chgroup->transform = 1;
729  if (s->avctx->channels == 2) {
730  chgroup->decorrelation_matrix[0] = 1.0;
731  chgroup->decorrelation_matrix[1] = -1.0;
732  chgroup->decorrelation_matrix[2] = 1.0;
733  chgroup->decorrelation_matrix[3] = 1.0;
734  } else {
736  chgroup->decorrelation_matrix[0] = 0.70703125;
737  chgroup->decorrelation_matrix[1] = -0.70703125;
738  chgroup->decorrelation_matrix[2] = 0.70703125;
739  chgroup->decorrelation_matrix[3] = 0.70703125;
740  }
741  }
742  } else if (chgroup->num_channels > 2) {
743  if (get_bits1(&s->gb)) {
744  chgroup->transform = 1;
745  if (get_bits1(&s->gb)) {
746  decode_decorrelation_matrix(s, chgroup);
747  } else {
749  if (chgroup->num_channels > 6) {
751  "coupled channels > 6\n");
752  } else {
753  memcpy(chgroup->decorrelation_matrix,
755  chgroup->num_channels * chgroup->num_channels *
756  sizeof(*chgroup->decorrelation_matrix));
757  }
758  }
759  }
760  }
761 
763  if (chgroup->transform) {
764  if (!get_bits1(&s->gb)) {
765  int i;
767  for (i = 0; i < s->num_bands; i++) {
768  chgroup->transform_band[i] = get_bits1(&s->gb);
769  }
770  } else {
771  memset(chgroup->transform_band, 1, s->num_bands);
772  }
773  }
774  remaining_channels -= chgroup->num_channels;
775  }
776  }
777  return 0;
778 }
779 
786 static int decode_coeffs(WMAProDecodeCtx *s, int c)
787 {
788  /* Integers 0..15 as single-precision floats. The table saves a
789  costly int to float conversion, and storing the values as
790  integers allows fast sign-flipping. */
791  static const uint32_t fval_tab[16] = {
792  0x00000000, 0x3f800000, 0x40000000, 0x40400000,
793  0x40800000, 0x40a00000, 0x40c00000, 0x40e00000,
794  0x41000000, 0x41100000, 0x41200000, 0x41300000,
795  0x41400000, 0x41500000, 0x41600000, 0x41700000,
796  };
797  int vlctable;
798  VLC* vlc;
799  WMAProChannelCtx* ci = &s->channel[c];
800  int rl_mode = 0;
801  int cur_coeff = 0;
802  int num_zeros = 0;
803  const uint16_t* run;
804  const float* level;
805 
806  av_dlog(s->avctx, "decode coefficients for channel %i\n", c);
807 
808  vlctable = get_bits1(&s->gb);
809  vlc = &coef_vlc[vlctable];
810 
811  if (vlctable) {
812  run = coef1_run;
813  level = coef1_level;
814  } else {
815  run = coef0_run;
816  level = coef0_level;
817  }
818 
821  while ((s->transmit_num_vec_coeffs || !rl_mode) &&
822  (cur_coeff + 3 < ci->num_vec_coeffs)) {
823  uint32_t vals[4];
824  int i;
825  unsigned int idx;
826 
827  idx = get_vlc2(&s->gb, vec4_vlc.table, VLCBITS, VEC4MAXDEPTH);
828 
829  if (idx == HUFF_VEC4_SIZE - 1) {
830  for (i = 0; i < 4; i += 2) {
831  idx = get_vlc2(&s->gb, vec2_vlc.table, VLCBITS, VEC2MAXDEPTH);
832  if (idx == HUFF_VEC2_SIZE - 1) {
833  uint32_t v0, v1;
834  v0 = get_vlc2(&s->gb, vec1_vlc.table, VLCBITS, VEC1MAXDEPTH);
835  if (v0 == HUFF_VEC1_SIZE - 1)
836  v0 += ff_wma_get_large_val(&s->gb);
837  v1 = get_vlc2(&s->gb, vec1_vlc.table, VLCBITS, VEC1MAXDEPTH);
838  if (v1 == HUFF_VEC1_SIZE - 1)
839  v1 += ff_wma_get_large_val(&s->gb);
840  vals[i ] = av_float2int(v0);
841  vals[i+1] = av_float2int(v1);
842  } else {
843  vals[i] = fval_tab[symbol_to_vec2[idx] >> 4 ];
844  vals[i+1] = fval_tab[symbol_to_vec2[idx] & 0xF];
845  }
846  }
847  } else {
848  vals[0] = fval_tab[ symbol_to_vec4[idx] >> 12 ];
849  vals[1] = fval_tab[(symbol_to_vec4[idx] >> 8) & 0xF];
850  vals[2] = fval_tab[(symbol_to_vec4[idx] >> 4) & 0xF];
851  vals[3] = fval_tab[ symbol_to_vec4[idx] & 0xF];
852  }
853 
855  for (i = 0; i < 4; i++) {
856  if (vals[i]) {
857  uint32_t sign = get_bits1(&s->gb) - 1;
858  AV_WN32A(&ci->coeffs[cur_coeff], vals[i] ^ sign << 31);
859  num_zeros = 0;
860  } else {
861  ci->coeffs[cur_coeff] = 0;
864  rl_mode |= (++num_zeros > s->subframe_len >> 8);
865  }
866  ++cur_coeff;
867  }
868  }
869 
871  if (cur_coeff < s->subframe_len) {
872  memset(&ci->coeffs[cur_coeff], 0,
873  sizeof(*ci->coeffs) * (s->subframe_len - cur_coeff));
874  if (ff_wma_run_level_decode(s->avctx, &s->gb, vlc,
875  level, run, 1, ci->coeffs,
876  cur_coeff, s->subframe_len,
877  s->subframe_len, s->esc_len, 0))
878  return AVERROR_INVALIDDATA;
879  }
880 
881  return 0;
882 }
883 
890 {
891  int i;
892 
897  for (i = 0; i < s->channels_for_cur_subframe; i++) {
899  int* sf;
900  int* sf_end;
902  sf_end = s->channel[c].scale_factors + s->num_bands;
903 
909  if (s->channel[c].reuse_sf) {
910  const int8_t* sf_offsets = s->sf_offsets[s->table_idx][s->channel[c].table_idx];
911  int b;
912  for (b = 0; b < s->num_bands; b++)
913  s->channel[c].scale_factors[b] =
914  s->channel[c].saved_scale_factors[s->channel[c].scale_factor_idx][*sf_offsets++];
915  }
916 
917  if (!s->channel[c].cur_subframe || get_bits1(&s->gb)) {
918 
919  if (!s->channel[c].reuse_sf) {
920  int val;
922  s->channel[c].scale_factor_step = get_bits(&s->gb, 2) + 1;
923  val = 45 / s->channel[c].scale_factor_step;
924  for (sf = s->channel[c].scale_factors; sf < sf_end; sf++) {
925  val += get_vlc2(&s->gb, sf_vlc.table, SCALEVLCBITS, SCALEMAXDEPTH) - 60;
926  *sf = val;
927  }
928  } else {
929  int i;
931  for (i = 0; i < s->num_bands; i++) {
932  int idx;
933  int skip;
934  int val;
935  int sign;
936 
937  idx = get_vlc2(&s->gb, sf_rl_vlc.table, VLCBITS, SCALERLMAXDEPTH);
938 
939  if (!idx) {
940  uint32_t code = get_bits(&s->gb, 14);
941  val = code >> 6;
942  sign = (code & 1) - 1;
943  skip = (code & 0x3f) >> 1;
944  } else if (idx == 1) {
945  break;
946  } else {
947  skip = scale_rl_run[idx];
948  val = scale_rl_level[idx];
949  sign = get_bits1(&s->gb)-1;
950  }
951 
952  i += skip;
953  if (i >= s->num_bands) {
955  "invalid scale factor coding\n");
956  return AVERROR_INVALIDDATA;
957  }
958  s->channel[c].scale_factors[i] += (val ^ sign) - sign;
959  }
960  }
963  s->channel[c].table_idx = s->table_idx;
964  s->channel[c].reuse_sf = 1;
965  }
966 
969  for (sf = s->channel[c].scale_factors + 1; sf < sf_end; sf++) {
971  FFMAX(s->channel[c].max_scale_factor, *sf);
972  }
973 
974  }
975  return 0;
976 }
977 
983 {
984  int i;
985 
986  for (i = 0; i < s->num_chgroups; i++) {
987  if (s->chgroup[i].transform) {
988  float data[WMAPRO_MAX_CHANNELS];
989  const int num_channels = s->chgroup[i].num_channels;
990  float** ch_data = s->chgroup[i].channel_data;
991  float** ch_end = ch_data + num_channels;
992  const int8_t* tb = s->chgroup[i].transform_band;
993  int16_t* sfb;
994 
996  for (sfb = s->cur_sfb_offsets;
997  sfb < s->cur_sfb_offsets + s->num_bands; sfb++) {
998  int y;
999  if (*tb++ == 1) {
1001  for (y = sfb[0]; y < FFMIN(sfb[1], s->subframe_len); y++) {
1002  const float* mat = s->chgroup[i].decorrelation_matrix;
1003  const float* data_end = data + num_channels;
1004  float* data_ptr = data;
1005  float** ch;
1006 
1007  for (ch = ch_data; ch < ch_end; ch++)
1008  *data_ptr++ = (*ch)[y];
1009 
1010  for (ch = ch_data; ch < ch_end; ch++) {
1011  float sum = 0;
1012  data_ptr = data;
1013  while (data_ptr < data_end)
1014  sum += *data_ptr++ * *mat++;
1015 
1016  (*ch)[y] = sum;
1017  }
1018  }
1019  } else if (s->avctx->channels == 2) {
1020  int len = FFMIN(sfb[1], s->subframe_len) - sfb[0];
1021  s->fdsp.vector_fmul_scalar(ch_data[0] + sfb[0],
1022  ch_data[0] + sfb[0],
1023  181.0 / 128, len);
1024  s->fdsp.vector_fmul_scalar(ch_data[1] + sfb[0],
1025  ch_data[1] + sfb[0],
1026  181.0 / 128, len);
1027  }
1028  }
1029  }
1030  }
1031 }
1032 
1038 {
1039  int i;
1040  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1041  int c = s->channel_indexes_for_cur_subframe[i];
1042  float* window;
1043  int winlen = s->channel[c].prev_block_len;
1044  float* start = s->channel[c].coeffs - (winlen >> 1);
1045 
1046  if (s->subframe_len < winlen) {
1047  start += (winlen - s->subframe_len) >> 1;
1048  winlen = s->subframe_len;
1049  }
1050 
1051  window = s->windows[av_log2(winlen) - WMAPRO_BLOCK_MIN_BITS];
1052 
1053  winlen >>= 1;
1054 
1055  s->fdsp.vector_fmul_window(start, start, start + winlen,
1056  window, winlen);
1057 
1059  }
1060 }
1061 
1068 {
1069  int offset = s->samples_per_frame;
1070  int subframe_len = s->samples_per_frame;
1071  int i;
1072  int total_samples = s->samples_per_frame * s->avctx->channels;
1073  int transmit_coeffs = 0;
1074  int cur_subwoofer_cutoff;
1075 
1076  s->subframe_offset = get_bits_count(&s->gb);
1077 
1082  for (i = 0; i < s->avctx->channels; i++) {
1083  s->channel[i].grouped = 0;
1084  if (offset > s->channel[i].decoded_samples) {
1085  offset = s->channel[i].decoded_samples;
1086  subframe_len =
1088  }
1089  }
1090 
1091  av_dlog(s->avctx,
1092  "processing subframe with offset %i len %i\n", offset, subframe_len);
1093 
1096  for (i = 0; i < s->avctx->channels; i++) {
1097  const int cur_subframe = s->channel[i].cur_subframe;
1099  total_samples -= s->channel[i].decoded_samples;
1100 
1102  if (offset == s->channel[i].decoded_samples &&
1103  subframe_len == s->channel[i].subframe_len[cur_subframe]) {
1104  total_samples -= s->channel[i].subframe_len[cur_subframe];
1105  s->channel[i].decoded_samples +=
1106  s->channel[i].subframe_len[cur_subframe];
1109  }
1110  }
1111 
1114  if (!total_samples)
1115  s->parsed_all_subframes = 1;
1116 
1117 
1118  av_dlog(s->avctx, "subframe is part of %i channels\n",
1120 
1122  s->table_idx = av_log2(s->samples_per_frame/subframe_len);
1123  s->num_bands = s->num_sfb[s->table_idx];
1125  cur_subwoofer_cutoff = s->subwoofer_cutoffs[s->table_idx];
1126 
1128  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1129  int c = s->channel_indexes_for_cur_subframe[i];
1130 
1131  s->channel[c].coeffs = &s->channel[c].out[(s->samples_per_frame >> 1)
1132  + offset];
1133  }
1134 
1135  s->subframe_len = subframe_len;
1136  s->esc_len = av_log2(s->subframe_len - 1) + 1;
1137 
1139  if (get_bits1(&s->gb)) {
1140  int num_fill_bits;
1141  if (!(num_fill_bits = get_bits(&s->gb, 2))) {
1142  int len = get_bits(&s->gb, 4);
1143  num_fill_bits = (len ? get_bits(&s->gb, len) : 0) + 1;
1144  }
1145 
1146  if (num_fill_bits >= 0) {
1147  if (get_bits_count(&s->gb) + num_fill_bits > s->num_saved_bits) {
1148  av_log(s->avctx, AV_LOG_ERROR, "invalid number of fill bits\n");
1149  return AVERROR_INVALIDDATA;
1150  }
1151 
1152  skip_bits_long(&s->gb, num_fill_bits);
1153  }
1154  }
1155 
1157  if (get_bits1(&s->gb)) {
1158  av_log_ask_for_sample(s->avctx, "reserved bit set\n");
1159  return AVERROR_PATCHWELCOME;
1160  }
1161 
1162 
1163  if (decode_channel_transform(s) < 0)
1164  return AVERROR_INVALIDDATA;
1165 
1166 
1167  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1168  int c = s->channel_indexes_for_cur_subframe[i];
1169  if ((s->channel[c].transmit_coefs = get_bits1(&s->gb)))
1170  transmit_coeffs = 1;
1171  }
1172 
1174  if (transmit_coeffs) {
1175  int step;
1176  int quant_step = 90 * s->bits_per_sample >> 4;
1177 
1179  if ((s->transmit_num_vec_coeffs = get_bits1(&s->gb))) {
1180  int num_bits = av_log2((s->subframe_len + 3)/4) + 1;
1181  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1182  int c = s->channel_indexes_for_cur_subframe[i];
1183  int num_vec_coeffs = get_bits(&s->gb, num_bits) << 2;
1184  if (num_vec_coeffs > s->subframe_len) {
1185  av_log(s->avctx, AV_LOG_ERROR, "num_vec_coeffs %d is too large\n", num_vec_coeffs);
1186  return AVERROR_INVALIDDATA;
1187  }
1188  s->channel[c].num_vec_coeffs = num_vec_coeffs;
1189  }
1190  } else {
1191  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1192  int c = s->channel_indexes_for_cur_subframe[i];
1194  }
1195  }
1197  step = get_sbits(&s->gb, 6);
1198  quant_step += step;
1199  if (step == -32 || step == 31) {
1200  const int sign = (step == 31) - 1;
1201  int quant = 0;
1202  while (get_bits_count(&s->gb) + 5 < s->num_saved_bits &&
1203  (step = get_bits(&s->gb, 5)) == 31) {
1204  quant += 31;
1205  }
1206  quant_step += ((quant + step) ^ sign) - sign;
1207  }
1208  if (quant_step < 0) {
1209  av_log(s->avctx, AV_LOG_DEBUG, "negative quant step\n");
1210  }
1211 
1214  if (s->channels_for_cur_subframe == 1) {
1215  s->channel[s->channel_indexes_for_cur_subframe[0]].quant_step = quant_step;
1216  } else {
1217  int modifier_len = get_bits(&s->gb, 3);
1218  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1219  int c = s->channel_indexes_for_cur_subframe[i];
1220  s->channel[c].quant_step = quant_step;
1221  if (get_bits1(&s->gb)) {
1222  if (modifier_len) {
1223  s->channel[c].quant_step += get_bits(&s->gb, modifier_len) + 1;
1224  } else
1225  ++s->channel[c].quant_step;
1226  }
1227  }
1228  }
1229 
1231  if (decode_scale_factors(s) < 0)
1232  return AVERROR_INVALIDDATA;
1233  }
1234 
1235  av_dlog(s->avctx, "BITSTREAM: subframe header length was %i\n",
1236  get_bits_count(&s->gb) - s->subframe_offset);
1237 
1239  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1240  int c = s->channel_indexes_for_cur_subframe[i];
1241  if (s->channel[c].transmit_coefs &&
1242  get_bits_count(&s->gb) < s->num_saved_bits) {
1243  decode_coeffs(s, c);
1244  } else
1245  memset(s->channel[c].coeffs, 0,
1246  sizeof(*s->channel[c].coeffs) * subframe_len);
1247  }
1248 
1249  av_dlog(s->avctx, "BITSTREAM: subframe length was %i\n",
1250  get_bits_count(&s->gb) - s->subframe_offset);
1251 
1252  if (transmit_coeffs) {
1253  FFTContext *mdct = &s->mdct_ctx[av_log2(subframe_len) - WMAPRO_BLOCK_MIN_BITS];
1256  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1257  int c = s->channel_indexes_for_cur_subframe[i];
1258  const int* sf = s->channel[c].scale_factors;
1259  int b;
1260 
1261  if (c == s->lfe_channel)
1262  memset(&s->tmp[cur_subwoofer_cutoff], 0, sizeof(*s->tmp) *
1263  (subframe_len - cur_subwoofer_cutoff));
1264 
1266  for (b = 0; b < s->num_bands; b++) {
1267  const int end = FFMIN(s->cur_sfb_offsets[b+1], s->subframe_len);
1268  const int exp = s->channel[c].quant_step -
1269  (s->channel[c].max_scale_factor - *sf++) *
1270  s->channel[c].scale_factor_step;
1271  const float quant = pow(10.0, exp / 20.0);
1272  int start = s->cur_sfb_offsets[b];
1273  s->fdsp.vector_fmul_scalar(s->tmp + start,
1274  s->channel[c].coeffs + start,
1275  quant, end - start);
1276  }
1277 
1279  mdct->imdct_half(mdct, s->channel[c].coeffs, s->tmp);
1280  }
1281  }
1282 
1284  wmapro_window(s);
1285 
1287  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1288  int c = s->channel_indexes_for_cur_subframe[i];
1289  if (s->channel[c].cur_subframe >= s->channel[c].num_subframes) {
1290  av_log(s->avctx, AV_LOG_ERROR, "broken subframe\n");
1291  return AVERROR_INVALIDDATA;
1292  }
1293  ++s->channel[c].cur_subframe;
1294  }
1295 
1296  return 0;
1297 }
1298 
1305 static int decode_frame(WMAProDecodeCtx *s, AVFrame *frame, int *got_frame_ptr)
1306 {
1307  AVCodecContext *avctx = s->avctx;
1308  GetBitContext* gb = &s->gb;
1309  int more_frames = 0;
1310  int len = 0;
1311  int i, ret;
1312 
1314  if (s->len_prefix)
1315  len = get_bits(gb, s->log2_frame_size);
1316 
1317  av_dlog(s->avctx, "decoding frame with length %x\n", len);
1318 
1320  if (decode_tilehdr(s)) {
1321  s->packet_loss = 1;
1322  return 0;
1323  }
1324 
1326  if (s->avctx->channels > 1 && get_bits1(gb)) {
1327  if (get_bits1(gb)) {
1328  for (i = 0; i < avctx->channels * avctx->channels; i++)
1329  skip_bits(gb, 4);
1330  }
1331  }
1332 
1334  if (s->dynamic_range_compression) {
1335  s->drc_gain = get_bits(gb, 8);
1336  av_dlog(s->avctx, "drc_gain %i\n", s->drc_gain);
1337  }
1338 
1341  if (get_bits1(gb)) {
1342  int av_unused skip;
1343 
1345  if (get_bits1(gb)) {
1346  skip = get_bits(gb, av_log2(s->samples_per_frame * 2));
1347  av_dlog(s->avctx, "start skip: %i\n", skip);
1348  }
1349 
1351  if (get_bits1(gb)) {
1352  skip = get_bits(gb, av_log2(s->samples_per_frame * 2));
1353  av_dlog(s->avctx, "end skip: %i\n", skip);
1354  }
1355 
1356  }
1357 
1358  av_dlog(s->avctx, "BITSTREAM: frame header length was %i\n",
1359  get_bits_count(gb) - s->frame_offset);
1360 
1362  s->parsed_all_subframes = 0;
1363  for (i = 0; i < avctx->channels; i++) {
1364  s->channel[i].decoded_samples = 0;
1365  s->channel[i].cur_subframe = 0;
1366  s->channel[i].reuse_sf = 0;
1367  }
1368 
1370  while (!s->parsed_all_subframes) {
1371  if (decode_subframe(s) < 0) {
1372  s->packet_loss = 1;
1373  return 0;
1374  }
1375  }
1376 
1377  /* get output buffer */
1378  frame->nb_samples = s->samples_per_frame;
1379  if ((ret = ff_get_buffer(avctx, frame)) < 0) {
1380  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1381  s->packet_loss = 1;
1382  return 0;
1383  }
1384 
1386  for (i = 0; i < avctx->channels; i++)
1387  memcpy(frame->extended_data[i], s->channel[i].out,
1388  s->samples_per_frame * sizeof(*s->channel[i].out));
1389 
1390  for (i = 0; i < avctx->channels; i++) {
1392  memcpy(&s->channel[i].out[0],
1393  &s->channel[i].out[s->samples_per_frame],
1394  s->samples_per_frame * sizeof(*s->channel[i].out) >> 1);
1395  }
1396 
1397  if (s->skip_frame) {
1398  s->skip_frame = 0;
1399  *got_frame_ptr = 0;
1400  } else {
1401  *got_frame_ptr = 1;
1402  }
1403 
1404  if (s->len_prefix) {
1405  if (len != (get_bits_count(gb) - s->frame_offset) + 2) {
1408  "frame[%i] would have to skip %i bits\n", s->frame_num,
1409  len - (get_bits_count(gb) - s->frame_offset) - 1);
1410  s->packet_loss = 1;
1411  return 0;
1412  }
1413 
1415  skip_bits_long(gb, len - (get_bits_count(gb) - s->frame_offset) - 1);
1416  } else {
1417  while (get_bits_count(gb) < s->num_saved_bits && get_bits1(gb) == 0) {
1418  }
1419  }
1420 
1422  more_frames = get_bits1(gb);
1423 
1424  ++s->frame_num;
1425  return more_frames;
1426 }
1427 
1435 {
1436  return s->buf_bit_size - get_bits_count(gb);
1437 }
1438 
1446 static void save_bits(WMAProDecodeCtx *s, GetBitContext* gb, int len,
1447  int append)
1448 {
1449  int buflen;
1450 
1455  if (!append) {
1456  s->frame_offset = get_bits_count(gb) & 7;
1457  s->num_saved_bits = s->frame_offset;
1459  }
1460 
1461  buflen = (put_bits_count(&s->pb) + len + 8) >> 3;
1462 
1463  if (len <= 0 || buflen > MAX_FRAMESIZE) {
1464  av_log_ask_for_sample(s->avctx, "input buffer too small\n");
1465  s->packet_loss = 1;
1466  return;
1467  }
1468 
1469  s->num_saved_bits += len;
1470  if (!append) {
1471  avpriv_copy_bits(&s->pb, gb->buffer + (get_bits_count(gb) >> 3),
1472  s->num_saved_bits);
1473  } else {
1474  int align = 8 - (get_bits_count(gb) & 7);
1475  align = FFMIN(align, len);
1476  put_bits(&s->pb, align, get_bits(gb, align));
1477  len -= align;
1478  avpriv_copy_bits(&s->pb, gb->buffer + (get_bits_count(gb) >> 3), len);
1479  }
1480  skip_bits_long(gb, len);
1481 
1482  {
1483  PutBitContext tmp = s->pb;
1484  flush_put_bits(&tmp);
1485  }
1486 
1488  skip_bits(&s->gb, s->frame_offset);
1489 }
1490 
1498 static int decode_packet(AVCodecContext *avctx, void *data,
1499  int *got_frame_ptr, AVPacket* avpkt)
1500 {
1501  WMAProDecodeCtx *s = avctx->priv_data;
1502  GetBitContext* gb = &s->pgb;
1503  const uint8_t* buf = avpkt->data;
1504  int buf_size = avpkt->size;
1505  int num_bits_prev_frame;
1506  int packet_sequence_number;
1507 
1508  *got_frame_ptr = 0;
1509 
1510  if (s->packet_done || s->packet_loss) {
1511  s->packet_done = 0;
1512 
1514  if (buf_size < avctx->block_align)
1515  return 0;
1516 
1517  s->next_packet_start = buf_size - avctx->block_align;
1518  buf_size = avctx->block_align;
1519  s->buf_bit_size = buf_size << 3;
1520 
1522  init_get_bits(gb, buf, s->buf_bit_size);
1523  packet_sequence_number = get_bits(gb, 4);
1524  skip_bits(gb, 2);
1525 
1527  num_bits_prev_frame = get_bits(gb, s->log2_frame_size);
1528  av_dlog(avctx, "packet[%d]: nbpf %x\n", avctx->frame_number,
1529  num_bits_prev_frame);
1530 
1532  if (!s->packet_loss &&
1533  ((s->packet_sequence_number + 1) & 0xF) != packet_sequence_number) {
1534  s->packet_loss = 1;
1535  av_log(avctx, AV_LOG_ERROR, "Packet loss detected! seq %x vs %x\n",
1536  s->packet_sequence_number, packet_sequence_number);
1537  }
1538  s->packet_sequence_number = packet_sequence_number;
1539 
1540  if (num_bits_prev_frame > 0) {
1541  int remaining_packet_bits = s->buf_bit_size - get_bits_count(gb);
1542  if (num_bits_prev_frame >= remaining_packet_bits) {
1543  num_bits_prev_frame = remaining_packet_bits;
1544  s->packet_done = 1;
1545  }
1546 
1549  save_bits(s, gb, num_bits_prev_frame, 1);
1550  av_dlog(avctx, "accumulated %x bits of frame data\n",
1551  s->num_saved_bits - s->frame_offset);
1552 
1554  if (!s->packet_loss)
1555  decode_frame(s, data, got_frame_ptr);
1556  } else if (s->num_saved_bits - s->frame_offset) {
1557  av_dlog(avctx, "ignoring %x previously saved bits\n",
1558  s->num_saved_bits - s->frame_offset);
1559  }
1560 
1561  if (s->packet_loss) {
1565  s->num_saved_bits = 0;
1566  s->packet_loss = 0;
1567  }
1568 
1569  } else {
1570  int frame_size;
1571  s->buf_bit_size = (avpkt->size - s->next_packet_start) << 3;
1572  init_get_bits(gb, avpkt->data, s->buf_bit_size);
1573  skip_bits(gb, s->packet_offset);
1574  if (s->len_prefix && remaining_bits(s, gb) > s->log2_frame_size &&
1575  (frame_size = show_bits(gb, s->log2_frame_size)) &&
1576  frame_size <= remaining_bits(s, gb)) {
1577  save_bits(s, gb, frame_size, 0);
1578  if (!s->packet_loss)
1579  s->packet_done = !decode_frame(s, data, got_frame_ptr);
1580  } else if (!s->len_prefix
1581  && s->num_saved_bits > get_bits_count(&s->gb)) {
1589  s->packet_done = !decode_frame(s, data, got_frame_ptr);
1590  } else
1591  s->packet_done = 1;
1592  }
1593 
1594  if (s->packet_done && !s->packet_loss &&
1595  remaining_bits(s, gb) > 0) {
1598  save_bits(s, gb, remaining_bits(s, gb), 0);
1599  }
1600 
1601  s->packet_offset = get_bits_count(gb) & 7;
1602  if (s->packet_loss)
1603  return AVERROR_INVALIDDATA;
1604 
1605  return get_bits_count(gb) >> 3;
1606 }
1607 
1612 static void flush(AVCodecContext *avctx)
1613 {
1614  WMAProDecodeCtx *s = avctx->priv_data;
1615  int i;
1618  for (i = 0; i < avctx->channels; i++)
1619  memset(s->channel[i].out, 0, s->samples_per_frame *
1620  sizeof(*s->channel[i].out));
1621  s->packet_loss = 1;
1622 }
1623 
1624 
1629  .name = "wmapro",
1630  .type = AVMEDIA_TYPE_AUDIO,
1631  .id = AV_CODEC_ID_WMAPRO,
1632  .priv_data_size = sizeof(WMAProDecodeCtx),
1633  .init = decode_init,
1634  .close = decode_end,
1635  .decode = decode_packet,
1636  .capabilities = CODEC_CAP_SUBFRAMES | CODEC_CAP_DR1,
1637  .flush = flush,
1638  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 9 Professional"),
1639  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1641 };