FFmpeg  1.2.4
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  s->sfb_offsets[i][band - 1] = subframe_len;
414  s->num_sfb[i] = band - 1;
415  if (s->num_sfb[i] <= 0) {
416  av_log(avctx, AV_LOG_ERROR, "num_sfb invalid\n");
417  return AVERROR_INVALIDDATA;
418  }
419  }
420 
421 
427  for (i = 0; i < num_possible_block_sizes; i++) {
428  int b;
429  for (b = 0; b < s->num_sfb[i]; b++) {
430  int x;
431  int offset = ((s->sfb_offsets[i][b]
432  + s->sfb_offsets[i][b + 1] - 1) << i) >> 1;
433  for (x = 0; x < num_possible_block_sizes; x++) {
434  int v = 0;
435  while (s->sfb_offsets[x][v + 1] << x < offset)
436  ++v;
437  s->sf_offsets[i][x][b] = v;
438  }
439  }
440  }
441 
443  for (i = 0; i < WMAPRO_BLOCK_SIZES; i++)
445  1.0 / (1 << (WMAPRO_BLOCK_MIN_BITS + i - 1))
446  / (1 << (s->bits_per_sample - 1)));
447 
449  for (i = 0; i < WMAPRO_BLOCK_SIZES; i++) {
450  const int win_idx = WMAPRO_BLOCK_MAX_BITS - i;
451  ff_init_ff_sine_windows(win_idx);
452  s->windows[WMAPRO_BLOCK_SIZES - i - 1] = ff_sine_windows[win_idx];
453  }
454 
456  for (i = 0; i < num_possible_block_sizes; i++) {
457  int block_size = s->samples_per_frame >> i;
458  int cutoff = (440*block_size + 3 * (s->avctx->sample_rate >> 1) - 1)
459  / s->avctx->sample_rate;
460  s->subwoofer_cutoffs[i] = av_clip(cutoff, 4, block_size);
461  }
462 
464  for (i = 0; i < 33; i++)
465  sin64[i] = sin(i*M_PI / 64.0);
466 
467  if (avctx->debug & FF_DEBUG_BITSTREAM)
468  dump_context(s);
469 
470  avctx->channel_layout = channel_mask;
471 
472  return 0;
473 }
474 
482 {
483  int frame_len_shift = 0;
484  int subframe_len;
485 
487  if (offset == s->samples_per_frame - s->min_samples_per_subframe)
488  return s->min_samples_per_subframe;
489 
491  if (s->max_subframe_len_bit) {
492  if (get_bits1(&s->gb))
493  frame_len_shift = 1 + get_bits(&s->gb, s->subframe_len_bits-1);
494  } else
495  frame_len_shift = get_bits(&s->gb, s->subframe_len_bits);
496 
497  subframe_len = s->samples_per_frame >> frame_len_shift;
498 
500  if (subframe_len < s->min_samples_per_subframe ||
501  subframe_len > s->samples_per_frame) {
502  av_log(s->avctx, AV_LOG_ERROR, "broken frame: subframe_len %i\n",
503  subframe_len);
504  return AVERROR_INVALIDDATA;
505  }
506  return subframe_len;
507 }
508 
530 {
531  uint16_t num_samples[WMAPRO_MAX_CHANNELS] = { 0 };
532  uint8_t contains_subframe[WMAPRO_MAX_CHANNELS];
533  int channels_for_cur_subframe = s->avctx->channels;
534  int fixed_channel_layout = 0;
535  int min_channel_len = 0;
536  int c;
537 
538  /* Should never consume more than 3073 bits (256 iterations for the
539  * while loop when always the minimum amount of 128 samples is subtracted
540  * from missing samples in the 8 channel case).
541  * 1 + BLOCK_MAX_SIZE * MAX_CHANNELS / BLOCK_MIN_SIZE * (MAX_CHANNELS + 4)
542  */
543 
545  for (c = 0; c < s->avctx->channels; c++)
546  s->channel[c].num_subframes = 0;
547 
548  if (s->max_num_subframes == 1 || get_bits1(&s->gb))
549  fixed_channel_layout = 1;
550 
552  do {
553  int subframe_len;
554 
556  for (c = 0; c < s->avctx->channels; c++) {
557  if (num_samples[c] == min_channel_len) {
558  if (fixed_channel_layout || channels_for_cur_subframe == 1 ||
559  (min_channel_len == s->samples_per_frame - s->min_samples_per_subframe))
560  contains_subframe[c] = 1;
561  else
562  contains_subframe[c] = get_bits1(&s->gb);
563  } else
564  contains_subframe[c] = 0;
565  }
566 
568  if ((subframe_len = decode_subframe_length(s, min_channel_len)) <= 0)
569  return AVERROR_INVALIDDATA;
570 
572  min_channel_len += subframe_len;
573  for (c = 0; c < s->avctx->channels; c++) {
574  WMAProChannelCtx* chan = &s->channel[c];
575 
576  if (contains_subframe[c]) {
577  if (chan->num_subframes >= MAX_SUBFRAMES) {
579  "broken frame: num subframes > 31\n");
580  return AVERROR_INVALIDDATA;
581  }
582  chan->subframe_len[chan->num_subframes] = subframe_len;
583  num_samples[c] += subframe_len;
584  ++chan->num_subframes;
585  if (num_samples[c] > s->samples_per_frame) {
586  av_log(s->avctx, AV_LOG_ERROR, "broken frame: "
587  "channel len > samples_per_frame\n");
588  return AVERROR_INVALIDDATA;
589  }
590  } else if (num_samples[c] <= min_channel_len) {
591  if (num_samples[c] < min_channel_len) {
592  channels_for_cur_subframe = 0;
593  min_channel_len = num_samples[c];
594  }
595  ++channels_for_cur_subframe;
596  }
597  }
598  } while (min_channel_len < s->samples_per_frame);
599 
600  for (c = 0; c < s->avctx->channels; c++) {
601  int i;
602  int offset = 0;
603  for (i = 0; i < s->channel[c].num_subframes; i++) {
604  av_dlog(s->avctx, "frame[%i] channel[%i] subframe[%i]"
605  " len %i\n", s->frame_num, c, i,
606  s->channel[c].subframe_len[i]);
607  s->channel[c].subframe_offset[i] = offset;
608  offset += s->channel[c].subframe_len[i];
609  }
610  }
611 
612  return 0;
613 }
614 
621  WMAProChannelGrp *chgroup)
622 {
623  int i;
624  int offset = 0;
625  int8_t rotation_offset[WMAPRO_MAX_CHANNELS * WMAPRO_MAX_CHANNELS];
626  memset(chgroup->decorrelation_matrix, 0, s->avctx->channels *
627  s->avctx->channels * sizeof(*chgroup->decorrelation_matrix));
628 
629  for (i = 0; i < chgroup->num_channels * (chgroup->num_channels - 1) >> 1; i++)
630  rotation_offset[i] = get_bits(&s->gb, 6);
631 
632  for (i = 0; i < chgroup->num_channels; i++)
633  chgroup->decorrelation_matrix[chgroup->num_channels * i + i] =
634  get_bits1(&s->gb) ? 1.0 : -1.0;
635 
636  for (i = 1; i < chgroup->num_channels; i++) {
637  int x;
638  for (x = 0; x < i; x++) {
639  int y;
640  for (y = 0; y < i + 1; y++) {
641  float v1 = chgroup->decorrelation_matrix[x * chgroup->num_channels + y];
642  float v2 = chgroup->decorrelation_matrix[i * chgroup->num_channels + y];
643  int n = rotation_offset[offset + x];
644  float sinv;
645  float cosv;
646 
647  if (n < 32) {
648  sinv = sin64[n];
649  cosv = sin64[32 - n];
650  } else {
651  sinv = sin64[64 - n];
652  cosv = -sin64[n - 32];
653  }
654 
655  chgroup->decorrelation_matrix[y + x * chgroup->num_channels] =
656  (v1 * sinv) - (v2 * cosv);
657  chgroup->decorrelation_matrix[y + i * chgroup->num_channels] =
658  (v1 * cosv) + (v2 * sinv);
659  }
660  }
661  offset += i;
662  }
663 }
664 
671 {
672  int i;
673  /* should never consume more than 1921 bits for the 8 channel case
674  * 1 + MAX_CHANNELS * (MAX_CHANNELS + 2 + 3 * MAX_CHANNELS * MAX_CHANNELS
675  * + MAX_CHANNELS + MAX_BANDS + 1)
676  */
677 
679  s->num_chgroups = 0;
680  if (s->avctx->channels > 1) {
681  int remaining_channels = s->channels_for_cur_subframe;
682 
683  if (get_bits1(&s->gb)) {
685  "unsupported channel transform bit\n");
686  return AVERROR_PATCHWELCOME;
687  }
688 
689  for (s->num_chgroups = 0; remaining_channels &&
691  WMAProChannelGrp* chgroup = &s->chgroup[s->num_chgroups];
692  float** channel_data = chgroup->channel_data;
693  chgroup->num_channels = 0;
694  chgroup->transform = 0;
695 
697  if (remaining_channels > 2) {
698  for (i = 0; i < s->channels_for_cur_subframe; i++) {
699  int channel_idx = s->channel_indexes_for_cur_subframe[i];
700  if (!s->channel[channel_idx].grouped
701  && get_bits1(&s->gb)) {
702  ++chgroup->num_channels;
703  s->channel[channel_idx].grouped = 1;
704  *channel_data++ = s->channel[channel_idx].coeffs;
705  }
706  }
707  } else {
708  chgroup->num_channels = remaining_channels;
709  for (i = 0; i < s->channels_for_cur_subframe; i++) {
710  int channel_idx = s->channel_indexes_for_cur_subframe[i];
711  if (!s->channel[channel_idx].grouped)
712  *channel_data++ = s->channel[channel_idx].coeffs;
713  s->channel[channel_idx].grouped = 1;
714  }
715  }
716 
718  if (chgroup->num_channels == 2) {
719  if (get_bits1(&s->gb)) {
720  if (get_bits1(&s->gb)) {
722  "unsupported channel transform type\n");
723  }
724  } else {
725  chgroup->transform = 1;
726  if (s->avctx->channels == 2) {
727  chgroup->decorrelation_matrix[0] = 1.0;
728  chgroup->decorrelation_matrix[1] = -1.0;
729  chgroup->decorrelation_matrix[2] = 1.0;
730  chgroup->decorrelation_matrix[3] = 1.0;
731  } else {
733  chgroup->decorrelation_matrix[0] = 0.70703125;
734  chgroup->decorrelation_matrix[1] = -0.70703125;
735  chgroup->decorrelation_matrix[2] = 0.70703125;
736  chgroup->decorrelation_matrix[3] = 0.70703125;
737  }
738  }
739  } else if (chgroup->num_channels > 2) {
740  if (get_bits1(&s->gb)) {
741  chgroup->transform = 1;
742  if (get_bits1(&s->gb)) {
743  decode_decorrelation_matrix(s, chgroup);
744  } else {
746  if (chgroup->num_channels > 6) {
748  "coupled channels > 6\n");
749  } else {
750  memcpy(chgroup->decorrelation_matrix,
752  chgroup->num_channels * chgroup->num_channels *
753  sizeof(*chgroup->decorrelation_matrix));
754  }
755  }
756  }
757  }
758 
760  if (chgroup->transform) {
761  if (!get_bits1(&s->gb)) {
762  int i;
764  for (i = 0; i < s->num_bands; i++) {
765  chgroup->transform_band[i] = get_bits1(&s->gb);
766  }
767  } else {
768  memset(chgroup->transform_band, 1, s->num_bands);
769  }
770  }
771  remaining_channels -= chgroup->num_channels;
772  }
773  }
774  return 0;
775 }
776 
783 static int decode_coeffs(WMAProDecodeCtx *s, int c)
784 {
785  /* Integers 0..15 as single-precision floats. The table saves a
786  costly int to float conversion, and storing the values as
787  integers allows fast sign-flipping. */
788  static const uint32_t fval_tab[16] = {
789  0x00000000, 0x3f800000, 0x40000000, 0x40400000,
790  0x40800000, 0x40a00000, 0x40c00000, 0x40e00000,
791  0x41000000, 0x41100000, 0x41200000, 0x41300000,
792  0x41400000, 0x41500000, 0x41600000, 0x41700000,
793  };
794  int vlctable;
795  VLC* vlc;
796  WMAProChannelCtx* ci = &s->channel[c];
797  int rl_mode = 0;
798  int cur_coeff = 0;
799  int num_zeros = 0;
800  const uint16_t* run;
801  const float* level;
802 
803  av_dlog(s->avctx, "decode coefficients for channel %i\n", c);
804 
805  vlctable = get_bits1(&s->gb);
806  vlc = &coef_vlc[vlctable];
807 
808  if (vlctable) {
809  run = coef1_run;
810  level = coef1_level;
811  } else {
812  run = coef0_run;
813  level = coef0_level;
814  }
815 
818  while ((s->transmit_num_vec_coeffs || !rl_mode) &&
819  (cur_coeff + 3 < ci->num_vec_coeffs)) {
820  uint32_t vals[4];
821  int i;
822  unsigned int idx;
823 
824  idx = get_vlc2(&s->gb, vec4_vlc.table, VLCBITS, VEC4MAXDEPTH);
825 
826  if (idx == HUFF_VEC4_SIZE - 1) {
827  for (i = 0; i < 4; i += 2) {
828  idx = get_vlc2(&s->gb, vec2_vlc.table, VLCBITS, VEC2MAXDEPTH);
829  if (idx == HUFF_VEC2_SIZE - 1) {
830  uint32_t v0, v1;
831  v0 = get_vlc2(&s->gb, vec1_vlc.table, VLCBITS, VEC1MAXDEPTH);
832  if (v0 == HUFF_VEC1_SIZE - 1)
833  v0 += ff_wma_get_large_val(&s->gb);
834  v1 = get_vlc2(&s->gb, vec1_vlc.table, VLCBITS, VEC1MAXDEPTH);
835  if (v1 == HUFF_VEC1_SIZE - 1)
836  v1 += ff_wma_get_large_val(&s->gb);
837  vals[i ] = av_float2int(v0);
838  vals[i+1] = av_float2int(v1);
839  } else {
840  vals[i] = fval_tab[symbol_to_vec2[idx] >> 4 ];
841  vals[i+1] = fval_tab[symbol_to_vec2[idx] & 0xF];
842  }
843  }
844  } else {
845  vals[0] = fval_tab[ symbol_to_vec4[idx] >> 12 ];
846  vals[1] = fval_tab[(symbol_to_vec4[idx] >> 8) & 0xF];
847  vals[2] = fval_tab[(symbol_to_vec4[idx] >> 4) & 0xF];
848  vals[3] = fval_tab[ symbol_to_vec4[idx] & 0xF];
849  }
850 
852  for (i = 0; i < 4; i++) {
853  if (vals[i]) {
854  uint32_t sign = get_bits1(&s->gb) - 1;
855  AV_WN32A(&ci->coeffs[cur_coeff], vals[i] ^ sign << 31);
856  num_zeros = 0;
857  } else {
858  ci->coeffs[cur_coeff] = 0;
861  rl_mode |= (++num_zeros > s->subframe_len >> 8);
862  }
863  ++cur_coeff;
864  }
865  }
866 
868  if (cur_coeff < s->subframe_len) {
869  memset(&ci->coeffs[cur_coeff], 0,
870  sizeof(*ci->coeffs) * (s->subframe_len - cur_coeff));
871  if (ff_wma_run_level_decode(s->avctx, &s->gb, vlc,
872  level, run, 1, ci->coeffs,
873  cur_coeff, s->subframe_len,
874  s->subframe_len, s->esc_len, 0))
875  return AVERROR_INVALIDDATA;
876  }
877 
878  return 0;
879 }
880 
887 {
888  int i;
889 
894  for (i = 0; i < s->channels_for_cur_subframe; i++) {
896  int* sf;
897  int* sf_end;
899  sf_end = s->channel[c].scale_factors + s->num_bands;
900 
906  if (s->channel[c].reuse_sf) {
907  const int8_t* sf_offsets = s->sf_offsets[s->table_idx][s->channel[c].table_idx];
908  int b;
909  for (b = 0; b < s->num_bands; b++)
910  s->channel[c].scale_factors[b] =
911  s->channel[c].saved_scale_factors[s->channel[c].scale_factor_idx][*sf_offsets++];
912  }
913 
914  if (!s->channel[c].cur_subframe || get_bits1(&s->gb)) {
915 
916  if (!s->channel[c].reuse_sf) {
917  int val;
919  s->channel[c].scale_factor_step = get_bits(&s->gb, 2) + 1;
920  val = 45 / s->channel[c].scale_factor_step;
921  for (sf = s->channel[c].scale_factors; sf < sf_end; sf++) {
922  val += get_vlc2(&s->gb, sf_vlc.table, SCALEVLCBITS, SCALEMAXDEPTH) - 60;
923  *sf = val;
924  }
925  } else {
926  int i;
928  for (i = 0; i < s->num_bands; i++) {
929  int idx;
930  int skip;
931  int val;
932  int sign;
933 
934  idx = get_vlc2(&s->gb, sf_rl_vlc.table, VLCBITS, SCALERLMAXDEPTH);
935 
936  if (!idx) {
937  uint32_t code = get_bits(&s->gb, 14);
938  val = code >> 6;
939  sign = (code & 1) - 1;
940  skip = (code & 0x3f) >> 1;
941  } else if (idx == 1) {
942  break;
943  } else {
944  skip = scale_rl_run[idx];
945  val = scale_rl_level[idx];
946  sign = get_bits1(&s->gb)-1;
947  }
948 
949  i += skip;
950  if (i >= s->num_bands) {
952  "invalid scale factor coding\n");
953  return AVERROR_INVALIDDATA;
954  }
955  s->channel[c].scale_factors[i] += (val ^ sign) - sign;
956  }
957  }
960  s->channel[c].table_idx = s->table_idx;
961  s->channel[c].reuse_sf = 1;
962  }
963 
966  for (sf = s->channel[c].scale_factors + 1; sf < sf_end; sf++) {
968  FFMAX(s->channel[c].max_scale_factor, *sf);
969  }
970 
971  }
972  return 0;
973 }
974 
980 {
981  int i;
982 
983  for (i = 0; i < s->num_chgroups; i++) {
984  if (s->chgroup[i].transform) {
985  float data[WMAPRO_MAX_CHANNELS];
986  const int num_channels = s->chgroup[i].num_channels;
987  float** ch_data = s->chgroup[i].channel_data;
988  float** ch_end = ch_data + num_channels;
989  const int8_t* tb = s->chgroup[i].transform_band;
990  int16_t* sfb;
991 
993  for (sfb = s->cur_sfb_offsets;
994  sfb < s->cur_sfb_offsets + s->num_bands; sfb++) {
995  int y;
996  if (*tb++ == 1) {
998  for (y = sfb[0]; y < FFMIN(sfb[1], s->subframe_len); y++) {
999  const float* mat = s->chgroup[i].decorrelation_matrix;
1000  const float* data_end = data + num_channels;
1001  float* data_ptr = data;
1002  float** ch;
1003 
1004  for (ch = ch_data; ch < ch_end; ch++)
1005  *data_ptr++ = (*ch)[y];
1006 
1007  for (ch = ch_data; ch < ch_end; ch++) {
1008  float sum = 0;
1009  data_ptr = data;
1010  while (data_ptr < data_end)
1011  sum += *data_ptr++ * *mat++;
1012 
1013  (*ch)[y] = sum;
1014  }
1015  }
1016  } else if (s->avctx->channels == 2) {
1017  int len = FFMIN(sfb[1], s->subframe_len) - sfb[0];
1018  s->fdsp.vector_fmul_scalar(ch_data[0] + sfb[0],
1019  ch_data[0] + sfb[0],
1020  181.0 / 128, len);
1021  s->fdsp.vector_fmul_scalar(ch_data[1] + sfb[0],
1022  ch_data[1] + sfb[0],
1023  181.0 / 128, len);
1024  }
1025  }
1026  }
1027  }
1028 }
1029 
1035 {
1036  int i;
1037  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1038  int c = s->channel_indexes_for_cur_subframe[i];
1039  float* window;
1040  int winlen = s->channel[c].prev_block_len;
1041  float* start = s->channel[c].coeffs - (winlen >> 1);
1042 
1043  if (s->subframe_len < winlen) {
1044  start += (winlen - s->subframe_len) >> 1;
1045  winlen = s->subframe_len;
1046  }
1047 
1048  window = s->windows[av_log2(winlen) - WMAPRO_BLOCK_MIN_BITS];
1049 
1050  winlen >>= 1;
1051 
1052  s->fdsp.vector_fmul_window(start, start, start + winlen,
1053  window, winlen);
1054 
1056  }
1057 }
1058 
1065 {
1066  int offset = s->samples_per_frame;
1067  int subframe_len = s->samples_per_frame;
1068  int i;
1069  int total_samples = s->samples_per_frame * s->avctx->channels;
1070  int transmit_coeffs = 0;
1071  int cur_subwoofer_cutoff;
1072 
1073  s->subframe_offset = get_bits_count(&s->gb);
1074 
1079  for (i = 0; i < s->avctx->channels; i++) {
1080  s->channel[i].grouped = 0;
1081  if (offset > s->channel[i].decoded_samples) {
1082  offset = s->channel[i].decoded_samples;
1083  subframe_len =
1085  }
1086  }
1087 
1088  av_dlog(s->avctx,
1089  "processing subframe with offset %i len %i\n", offset, subframe_len);
1090 
1093  for (i = 0; i < s->avctx->channels; i++) {
1094  const int cur_subframe = s->channel[i].cur_subframe;
1096  total_samples -= s->channel[i].decoded_samples;
1097 
1099  if (offset == s->channel[i].decoded_samples &&
1100  subframe_len == s->channel[i].subframe_len[cur_subframe]) {
1101  total_samples -= s->channel[i].subframe_len[cur_subframe];
1102  s->channel[i].decoded_samples +=
1103  s->channel[i].subframe_len[cur_subframe];
1106  }
1107  }
1108 
1111  if (!total_samples)
1112  s->parsed_all_subframes = 1;
1113 
1114 
1115  av_dlog(s->avctx, "subframe is part of %i channels\n",
1117 
1119  s->table_idx = av_log2(s->samples_per_frame/subframe_len);
1120  s->num_bands = s->num_sfb[s->table_idx];
1122  cur_subwoofer_cutoff = s->subwoofer_cutoffs[s->table_idx];
1123 
1125  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1126  int c = s->channel_indexes_for_cur_subframe[i];
1127 
1128  s->channel[c].coeffs = &s->channel[c].out[(s->samples_per_frame >> 1)
1129  + offset];
1130  }
1131 
1132  s->subframe_len = subframe_len;
1133  s->esc_len = av_log2(s->subframe_len - 1) + 1;
1134 
1136  if (get_bits1(&s->gb)) {
1137  int num_fill_bits;
1138  if (!(num_fill_bits = get_bits(&s->gb, 2))) {
1139  int len = get_bits(&s->gb, 4);
1140  num_fill_bits = (len ? get_bits(&s->gb, len) : 0) + 1;
1141  }
1142 
1143  if (num_fill_bits >= 0) {
1144  if (get_bits_count(&s->gb) + num_fill_bits > s->num_saved_bits) {
1145  av_log(s->avctx, AV_LOG_ERROR, "invalid number of fill bits\n");
1146  return AVERROR_INVALIDDATA;
1147  }
1148 
1149  skip_bits_long(&s->gb, num_fill_bits);
1150  }
1151  }
1152 
1154  if (get_bits1(&s->gb)) {
1155  av_log_ask_for_sample(s->avctx, "reserved bit set\n");
1156  return AVERROR_PATCHWELCOME;
1157  }
1158 
1159 
1160  if (decode_channel_transform(s) < 0)
1161  return AVERROR_INVALIDDATA;
1162 
1163 
1164  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1165  int c = s->channel_indexes_for_cur_subframe[i];
1166  if ((s->channel[c].transmit_coefs = get_bits1(&s->gb)))
1167  transmit_coeffs = 1;
1168  }
1169 
1171  if (transmit_coeffs) {
1172  int step;
1173  int quant_step = 90 * s->bits_per_sample >> 4;
1174 
1176  if ((s->transmit_num_vec_coeffs = get_bits1(&s->gb))) {
1177  int num_bits = av_log2((s->subframe_len + 3)/4) + 1;
1178  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1179  int c = s->channel_indexes_for_cur_subframe[i];
1180  int num_vec_coeffs = get_bits(&s->gb, num_bits) << 2;
1181  if (num_vec_coeffs > s->subframe_len) {
1182  av_log(s->avctx, AV_LOG_ERROR, "num_vec_coeffs %d is too large\n", num_vec_coeffs);
1183  return AVERROR_INVALIDDATA;
1184  }
1185  s->channel[c].num_vec_coeffs = num_vec_coeffs;
1186  }
1187  } else {
1188  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1189  int c = s->channel_indexes_for_cur_subframe[i];
1191  }
1192  }
1194  step = get_sbits(&s->gb, 6);
1195  quant_step += step;
1196  if (step == -32 || step == 31) {
1197  const int sign = (step == 31) - 1;
1198  int quant = 0;
1199  while (get_bits_count(&s->gb) + 5 < s->num_saved_bits &&
1200  (step = get_bits(&s->gb, 5)) == 31) {
1201  quant += 31;
1202  }
1203  quant_step += ((quant + step) ^ sign) - sign;
1204  }
1205  if (quant_step < 0) {
1206  av_log(s->avctx, AV_LOG_DEBUG, "negative quant step\n");
1207  }
1208 
1211  if (s->channels_for_cur_subframe == 1) {
1212  s->channel[s->channel_indexes_for_cur_subframe[0]].quant_step = quant_step;
1213  } else {
1214  int modifier_len = get_bits(&s->gb, 3);
1215  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1216  int c = s->channel_indexes_for_cur_subframe[i];
1217  s->channel[c].quant_step = quant_step;
1218  if (get_bits1(&s->gb)) {
1219  if (modifier_len) {
1220  s->channel[c].quant_step += get_bits(&s->gb, modifier_len) + 1;
1221  } else
1222  ++s->channel[c].quant_step;
1223  }
1224  }
1225  }
1226 
1228  if (decode_scale_factors(s) < 0)
1229  return AVERROR_INVALIDDATA;
1230  }
1231 
1232  av_dlog(s->avctx, "BITSTREAM: subframe header length was %i\n",
1233  get_bits_count(&s->gb) - s->subframe_offset);
1234 
1236  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1237  int c = s->channel_indexes_for_cur_subframe[i];
1238  if (s->channel[c].transmit_coefs &&
1239  get_bits_count(&s->gb) < s->num_saved_bits) {
1240  decode_coeffs(s, c);
1241  } else
1242  memset(s->channel[c].coeffs, 0,
1243  sizeof(*s->channel[c].coeffs) * subframe_len);
1244  }
1245 
1246  av_dlog(s->avctx, "BITSTREAM: subframe length was %i\n",
1247  get_bits_count(&s->gb) - s->subframe_offset);
1248 
1249  if (transmit_coeffs) {
1250  FFTContext *mdct = &s->mdct_ctx[av_log2(subframe_len) - WMAPRO_BLOCK_MIN_BITS];
1253  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1254  int c = s->channel_indexes_for_cur_subframe[i];
1255  const int* sf = s->channel[c].scale_factors;
1256  int b;
1257 
1258  if (c == s->lfe_channel)
1259  memset(&s->tmp[cur_subwoofer_cutoff], 0, sizeof(*s->tmp) *
1260  (subframe_len - cur_subwoofer_cutoff));
1261 
1263  for (b = 0; b < s->num_bands; b++) {
1264  const int end = FFMIN(s->cur_sfb_offsets[b+1], s->subframe_len);
1265  const int exp = s->channel[c].quant_step -
1266  (s->channel[c].max_scale_factor - *sf++) *
1267  s->channel[c].scale_factor_step;
1268  const float quant = pow(10.0, exp / 20.0);
1269  int start = s->cur_sfb_offsets[b];
1270  s->fdsp.vector_fmul_scalar(s->tmp + start,
1271  s->channel[c].coeffs + start,
1272  quant, end - start);
1273  }
1274 
1276  mdct->imdct_half(mdct, s->channel[c].coeffs, s->tmp);
1277  }
1278  }
1279 
1281  wmapro_window(s);
1282 
1284  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1285  int c = s->channel_indexes_for_cur_subframe[i];
1286  if (s->channel[c].cur_subframe >= s->channel[c].num_subframes) {
1287  av_log(s->avctx, AV_LOG_ERROR, "broken subframe\n");
1288  return AVERROR_INVALIDDATA;
1289  }
1290  ++s->channel[c].cur_subframe;
1291  }
1292 
1293  return 0;
1294 }
1295 
1302 static int decode_frame(WMAProDecodeCtx *s, AVFrame *frame, int *got_frame_ptr)
1303 {
1304  AVCodecContext *avctx = s->avctx;
1305  GetBitContext* gb = &s->gb;
1306  int more_frames = 0;
1307  int len = 0;
1308  int i, ret;
1309 
1311  if (s->len_prefix)
1312  len = get_bits(gb, s->log2_frame_size);
1313 
1314  av_dlog(s->avctx, "decoding frame with length %x\n", len);
1315 
1317  if (decode_tilehdr(s)) {
1318  s->packet_loss = 1;
1319  return 0;
1320  }
1321 
1323  if (s->avctx->channels > 1 && get_bits1(gb)) {
1324  if (get_bits1(gb)) {
1325  for (i = 0; i < avctx->channels * avctx->channels; i++)
1326  skip_bits(gb, 4);
1327  }
1328  }
1329 
1331  if (s->dynamic_range_compression) {
1332  s->drc_gain = get_bits(gb, 8);
1333  av_dlog(s->avctx, "drc_gain %i\n", s->drc_gain);
1334  }
1335 
1338  if (get_bits1(gb)) {
1339  int av_unused skip;
1340 
1342  if (get_bits1(gb)) {
1343  skip = get_bits(gb, av_log2(s->samples_per_frame * 2));
1344  av_dlog(s->avctx, "start skip: %i\n", skip);
1345  }
1346 
1348  if (get_bits1(gb)) {
1349  skip = get_bits(gb, av_log2(s->samples_per_frame * 2));
1350  av_dlog(s->avctx, "end skip: %i\n", skip);
1351  }
1352 
1353  }
1354 
1355  av_dlog(s->avctx, "BITSTREAM: frame header length was %i\n",
1356  get_bits_count(gb) - s->frame_offset);
1357 
1359  s->parsed_all_subframes = 0;
1360  for (i = 0; i < avctx->channels; i++) {
1361  s->channel[i].decoded_samples = 0;
1362  s->channel[i].cur_subframe = 0;
1363  s->channel[i].reuse_sf = 0;
1364  }
1365 
1367  while (!s->parsed_all_subframes) {
1368  if (decode_subframe(s) < 0) {
1369  s->packet_loss = 1;
1370  return 0;
1371  }
1372  }
1373 
1374  /* get output buffer */
1375  frame->nb_samples = s->samples_per_frame;
1376  if ((ret = ff_get_buffer(avctx, frame)) < 0) {
1377  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1378  s->packet_loss = 1;
1379  return 0;
1380  }
1381 
1383  for (i = 0; i < avctx->channels; i++)
1384  memcpy(frame->extended_data[i], s->channel[i].out,
1385  s->samples_per_frame * sizeof(*s->channel[i].out));
1386 
1387  for (i = 0; i < avctx->channels; i++) {
1389  memcpy(&s->channel[i].out[0],
1390  &s->channel[i].out[s->samples_per_frame],
1391  s->samples_per_frame * sizeof(*s->channel[i].out) >> 1);
1392  }
1393 
1394  if (s->skip_frame) {
1395  s->skip_frame = 0;
1396  *got_frame_ptr = 0;
1397  } else {
1398  *got_frame_ptr = 1;
1399  }
1400 
1401  if (s->len_prefix) {
1402  if (len != (get_bits_count(gb) - s->frame_offset) + 2) {
1405  "frame[%i] would have to skip %i bits\n", s->frame_num,
1406  len - (get_bits_count(gb) - s->frame_offset) - 1);
1407  s->packet_loss = 1;
1408  return 0;
1409  }
1410 
1412  skip_bits_long(gb, len - (get_bits_count(gb) - s->frame_offset) - 1);
1413  } else {
1414  while (get_bits_count(gb) < s->num_saved_bits && get_bits1(gb) == 0) {
1415  }
1416  }
1417 
1419  more_frames = get_bits1(gb);
1420 
1421  ++s->frame_num;
1422  return more_frames;
1423 }
1424 
1432 {
1433  return s->buf_bit_size - get_bits_count(gb);
1434 }
1435 
1443 static void save_bits(WMAProDecodeCtx *s, GetBitContext* gb, int len,
1444  int append)
1445 {
1446  int buflen;
1447 
1452  if (!append) {
1453  s->frame_offset = get_bits_count(gb) & 7;
1454  s->num_saved_bits = s->frame_offset;
1456  }
1457 
1458  buflen = (put_bits_count(&s->pb) + len + 8) >> 3;
1459 
1460  if (len <= 0 || buflen > MAX_FRAMESIZE) {
1461  av_log_ask_for_sample(s->avctx, "input buffer too small\n");
1462  s->packet_loss = 1;
1463  return;
1464  }
1465 
1466  s->num_saved_bits += len;
1467  if (!append) {
1468  avpriv_copy_bits(&s->pb, gb->buffer + (get_bits_count(gb) >> 3),
1469  s->num_saved_bits);
1470  } else {
1471  int align = 8 - (get_bits_count(gb) & 7);
1472  align = FFMIN(align, len);
1473  put_bits(&s->pb, align, get_bits(gb, align));
1474  len -= align;
1475  avpriv_copy_bits(&s->pb, gb->buffer + (get_bits_count(gb) >> 3), len);
1476  }
1477  skip_bits_long(gb, len);
1478 
1479  {
1480  PutBitContext tmp = s->pb;
1481  flush_put_bits(&tmp);
1482  }
1483 
1485  skip_bits(&s->gb, s->frame_offset);
1486 }
1487 
1495 static int decode_packet(AVCodecContext *avctx, void *data,
1496  int *got_frame_ptr, AVPacket* avpkt)
1497 {
1498  WMAProDecodeCtx *s = avctx->priv_data;
1499  GetBitContext* gb = &s->pgb;
1500  const uint8_t* buf = avpkt->data;
1501  int buf_size = avpkt->size;
1502  int num_bits_prev_frame;
1503  int packet_sequence_number;
1504 
1505  *got_frame_ptr = 0;
1506 
1507  if (s->packet_done || s->packet_loss) {
1508  s->packet_done = 0;
1509 
1511  if (buf_size < avctx->block_align)
1512  return 0;
1513 
1514  s->next_packet_start = buf_size - avctx->block_align;
1515  buf_size = avctx->block_align;
1516  s->buf_bit_size = buf_size << 3;
1517 
1519  init_get_bits(gb, buf, s->buf_bit_size);
1520  packet_sequence_number = get_bits(gb, 4);
1521  skip_bits(gb, 2);
1522 
1524  num_bits_prev_frame = get_bits(gb, s->log2_frame_size);
1525  av_dlog(avctx, "packet[%d]: nbpf %x\n", avctx->frame_number,
1526  num_bits_prev_frame);
1527 
1529  if (!s->packet_loss &&
1530  ((s->packet_sequence_number + 1) & 0xF) != packet_sequence_number) {
1531  s->packet_loss = 1;
1532  av_log(avctx, AV_LOG_ERROR, "Packet loss detected! seq %x vs %x\n",
1533  s->packet_sequence_number, packet_sequence_number);
1534  }
1535  s->packet_sequence_number = packet_sequence_number;
1536 
1537  if (num_bits_prev_frame > 0) {
1538  int remaining_packet_bits = s->buf_bit_size - get_bits_count(gb);
1539  if (num_bits_prev_frame >= remaining_packet_bits) {
1540  num_bits_prev_frame = remaining_packet_bits;
1541  s->packet_done = 1;
1542  }
1543 
1546  save_bits(s, gb, num_bits_prev_frame, 1);
1547  av_dlog(avctx, "accumulated %x bits of frame data\n",
1548  s->num_saved_bits - s->frame_offset);
1549 
1551  if (!s->packet_loss)
1552  decode_frame(s, data, got_frame_ptr);
1553  } else if (s->num_saved_bits - s->frame_offset) {
1554  av_dlog(avctx, "ignoring %x previously saved bits\n",
1555  s->num_saved_bits - s->frame_offset);
1556  }
1557 
1558  if (s->packet_loss) {
1562  s->num_saved_bits = 0;
1563  s->packet_loss = 0;
1564  }
1565 
1566  } else {
1567  int frame_size;
1568  s->buf_bit_size = (avpkt->size - s->next_packet_start) << 3;
1569  init_get_bits(gb, avpkt->data, s->buf_bit_size);
1570  skip_bits(gb, s->packet_offset);
1571  if (s->len_prefix && remaining_bits(s, gb) > s->log2_frame_size &&
1572  (frame_size = show_bits(gb, s->log2_frame_size)) &&
1573  frame_size <= remaining_bits(s, gb)) {
1574  save_bits(s, gb, frame_size, 0);
1575  s->packet_done = !decode_frame(s, data, got_frame_ptr);
1576  } else if (!s->len_prefix
1577  && s->num_saved_bits > get_bits_count(&s->gb)) {
1585  s->packet_done = !decode_frame(s, data, got_frame_ptr);
1586  } else
1587  s->packet_done = 1;
1588  }
1589 
1590  if (s->packet_done && !s->packet_loss &&
1591  remaining_bits(s, gb) > 0) {
1594  save_bits(s, gb, remaining_bits(s, gb), 0);
1595  }
1596 
1597  s->packet_offset = get_bits_count(gb) & 7;
1598  if (s->packet_loss)
1599  return AVERROR_INVALIDDATA;
1600 
1601  return get_bits_count(gb) >> 3;
1602 }
1603 
1608 static void flush(AVCodecContext *avctx)
1609 {
1610  WMAProDecodeCtx *s = avctx->priv_data;
1611  int i;
1614  for (i = 0; i < avctx->channels; i++)
1615  memset(s->channel[i].out, 0, s->samples_per_frame *
1616  sizeof(*s->channel[i].out));
1617  s->packet_loss = 1;
1618 }
1619 
1620 
1625  .name = "wmapro",
1626  .type = AVMEDIA_TYPE_AUDIO,
1627  .id = AV_CODEC_ID_WMAPRO,
1628  .priv_data_size = sizeof(WMAProDecodeCtx),
1629  .init = decode_init,
1630  .close = decode_end,
1631  .decode = decode_packet,
1632  .capabilities = CODEC_CAP_SUBFRAMES | CODEC_CAP_DR1,
1633  .flush = flush,
1634  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 9 Professional"),
1635  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1637 };