FFmpeg  4.2.3
wmalosslessdec.c
Go to the documentation of this file.
1 /*
2  * Windows Media Audio Lossless decoder
3  * Copyright (c) 2007 Baptiste Coudurier, Benjamin Larsson, Ulion
4  * Copyright (c) 2008 - 2011 Sascha Sommer, Benjamin Larsson
5  * Copyright (c) 2011 Andreas Ă–man
6  * Copyright (c) 2011 - 2012 Mashiat Sarker Shakkhar
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #include <inttypes.h>
26 
27 #include "libavutil/attributes.h"
28 #include "libavutil/avassert.h"
29 
30 #include "avcodec.h"
31 #include "internal.h"
32 #include "get_bits.h"
33 #include "put_bits.h"
34 #include "lossless_audiodsp.h"
35 #include "wma.h"
36 #include "wma_common.h"
37 
38 /** current decoder limitations */
39 #define WMALL_MAX_CHANNELS 8 ///< max number of handled channels
40 #define MAX_SUBFRAMES 32 ///< max number of subframes per channel
41 #define MAX_BANDS 29 ///< max number of scale factor bands
42 #define MAX_FRAMESIZE 32768 ///< maximum compressed frame size
43 #define MAX_ORDER 256
44 
45 #define WMALL_BLOCK_MIN_BITS 6 ///< log2 of min block size
46 #define WMALL_BLOCK_MAX_BITS 14 ///< log2 of max block size
47 #define WMALL_BLOCK_MAX_SIZE (1 << WMALL_BLOCK_MAX_BITS) ///< maximum block size
48 #define WMALL_BLOCK_SIZES (WMALL_BLOCK_MAX_BITS - WMALL_BLOCK_MIN_BITS + 1) ///< possible block sizes
49 
50 #define WMALL_COEFF_PAD_SIZE 16 ///< pad coef buffers with 0 for use with SIMD
51 
52 /**
53  * @brief frame-specific decoder context for a single channel
54  */
55 typedef struct WmallChannelCtx {
56  int16_t prev_block_len; ///< length of the previous block
59  uint16_t subframe_len[MAX_SUBFRAMES]; ///< subframe length in samples
60  uint16_t subframe_offsets[MAX_SUBFRAMES]; ///< subframe positions in the current frame
61  uint8_t cur_subframe; ///< current subframe number
62  uint16_t decoded_samples; ///< number of already processed samples
63  int quant_step; ///< quantization step for the current subframe
64  int transient_counter; ///< number of transient samples from the beginning of the transient zone
66 
67 /**
68  * @brief main decoder context
69  */
70 typedef struct WmallDecodeCtx {
71  /* generic decoder variables */
74  LLAudDSPContext dsp; ///< accelerated DSP functions
75  uint8_t *frame_data; ///< compressed frame data
76  int max_frame_size; ///< max bitstream size
77  PutBitContext pb; ///< context for filling the frame_data buffer
78 
79  /* frame size dependent frame information (set during initialization) */
80  uint32_t decode_flags; ///< used compression features
81  int len_prefix; ///< frame is prefixed with its length
82  int dynamic_range_compression; ///< frame contains DRC data
83  uint8_t bits_per_sample; ///< integer audio sample size for the unscaled IMDCT output (used to scale to [-1.0, 1.0])
84  uint16_t samples_per_frame; ///< number of samples to output
85  uint16_t log2_frame_size;
86  int8_t num_channels; ///< number of channels in the stream (same as AVCodecContext.num_channels)
87  int8_t lfe_channel; ///< lfe channel index
89  uint8_t subframe_len_bits; ///< number of bits used for the subframe length
90  uint8_t max_subframe_len_bit; ///< flag indicating that the subframe is of maximum size when the first subframe length bit is 1
92 
93  /* packet decode state */
94  GetBitContext pgb; ///< bitstream reader context for the packet
95  int next_packet_start; ///< start offset of the next WMA packet in the demuxer packet
96  uint8_t packet_offset; ///< offset to the frame in the packet
97  uint8_t packet_sequence_number; ///< current packet number
98  int num_saved_bits; ///< saved number of bits
99  int frame_offset; ///< frame offset in the bit reservoir
100  int subframe_offset; ///< subframe offset in the bit reservoir
101  uint8_t packet_loss; ///< set in case of bitstream error
102  uint8_t packet_done; ///< set when a packet is fully decoded
103 
104  /* frame decode state */
105  uint32_t frame_num; ///< current frame number (not used for decoding)
106  GetBitContext gb; ///< bitstream reader context
107  int buf_bit_size; ///< buffer size in bits
108  int16_t *samples_16[WMALL_MAX_CHANNELS]; ///< current sample buffer pointer (16-bit)
109  int32_t *samples_32[WMALL_MAX_CHANNELS]; ///< current sample buffer pointer (24-bit)
110  uint8_t drc_gain; ///< gain for the DRC tool
111  int8_t skip_frame; ///< skip output step
112  int8_t parsed_all_subframes; ///< all subframes decoded?
113 
114  /* subframe/block decode state */
115  int16_t subframe_len; ///< current subframe length
116  int8_t channels_for_cur_subframe; ///< number of channels that contain the subframe
117  int8_t channel_indexes_for_cur_subframe[WMALL_MAX_CHANNELS];
118 
120 
121  // WMA Lossless-specific
122 
128 
131  int16_t acfilter_coeffs[16];
132  int acfilter_prevvalues[WMALL_MAX_CHANNELS][16];
133 
134  int8_t mclms_order;
136  int16_t mclms_coeffs[WMALL_MAX_CHANNELS * WMALL_MAX_CHANNELS * 32];
137  int16_t mclms_coeffs_cur[WMALL_MAX_CHANNELS * WMALL_MAX_CHANNELS];
138  int32_t mclms_prevvalues[WMALL_MAX_CHANNELS * 2 * 32];
139  int32_t mclms_updates[WMALL_MAX_CHANNELS * 2 * 32];
141 
144 
145  struct {
146  int order;
147  int scaling;
148  int coefsend;
149  int bitsend;
150  DECLARE_ALIGNED(16, int16_t, coefs)[MAX_ORDER + WMALL_COEFF_PAD_SIZE/sizeof(int16_t)];
151  DECLARE_ALIGNED(16, int32_t, lms_prevvalues)[MAX_ORDER * 2 + WMALL_COEFF_PAD_SIZE/sizeof(int16_t)];
152  DECLARE_ALIGNED(16, int16_t, lms_updates)[MAX_ORDER * 2 + WMALL_COEFF_PAD_SIZE/sizeof(int16_t)];
153  int recent;
154  } cdlms[WMALL_MAX_CHANNELS][9];
155 
156  int cdlms_ttl[WMALL_MAX_CHANNELS];
157 
158  int bV3RTM;
159 
160  int is_channel_coded[WMALL_MAX_CHANNELS];
161  int update_speed[WMALL_MAX_CHANNELS];
162 
163  int transient[WMALL_MAX_CHANNELS];
164  int transient_pos[WMALL_MAX_CHANNELS];
166 
167  unsigned ave_sum[WMALL_MAX_CHANNELS];
168 
169  int channel_residues[WMALL_MAX_CHANNELS][WMALL_BLOCK_MAX_SIZE];
170 
171  int lpc_coefs[WMALL_MAX_CHANNELS][40];
176 
177 /** Get sign of integer (1 for positive, -1 for negative and 0 for zero) */
178 #define WMASIGN(x) (((x) > 0) - ((x) < 0))
179 
181 {
182  WmallDecodeCtx *s = avctx->priv_data;
183  uint8_t *edata_ptr = avctx->extradata;
184  unsigned int channel_mask;
185  int i, log2_max_num_subframes;
186 
187  if (avctx->block_align <= 0) {
188  av_log(avctx, AV_LOG_ERROR, "block_align is not set or invalid\n");
189  return AVERROR(EINVAL);
190  }
191 
192  if (avctx->channels < 0) {
193  av_log(avctx, AV_LOG_ERROR, "invalid number of channels %d\n",
194  avctx->channels);
195  return AVERROR_INVALIDDATA;
196  } else if (avctx->channels > WMALL_MAX_CHANNELS) {
197  avpriv_request_sample(avctx,
198  "More than %d channels", WMALL_MAX_CHANNELS);
199  return AVERROR_PATCHWELCOME;
200  }
201 
202  s->max_frame_size = MAX_FRAMESIZE * avctx->channels;
204  if (!s->frame_data)
205  return AVERROR(ENOMEM);
206 
207  s->avctx = avctx;
208  ff_llauddsp_init(&s->dsp);
210 
211  if (avctx->extradata_size >= 18) {
212  s->decode_flags = AV_RL16(edata_ptr + 14);
213  channel_mask = AV_RL32(edata_ptr + 2);
214  s->bits_per_sample = AV_RL16(edata_ptr);
215  if (s->bits_per_sample == 16)
217  else if (s->bits_per_sample == 24) {
219  avctx->bits_per_raw_sample = 24;
220  } else {
221  av_log(avctx, AV_LOG_ERROR, "Unknown bit-depth: %"PRIu8"\n",
222  s->bits_per_sample);
223  return AVERROR_INVALIDDATA;
224  }
225  /* dump the extradata */
226  for (i = 0; i < avctx->extradata_size; i++)
227  ff_dlog(avctx, "[%x] ", avctx->extradata[i]);
228  ff_dlog(avctx, "\n");
229 
230  } else {
231  avpriv_request_sample(avctx, "Unsupported extradata size");
232  return AVERROR_PATCHWELCOME;
233  }
234 
235  /* generic init */
236  s->log2_frame_size = av_log2(avctx->block_align) + 4;
237 
238  /* frame info */
239  s->skip_frame = 1; /* skip first frame */
240  s->packet_loss = 1;
241  s->len_prefix = s->decode_flags & 0x40;
242 
243  /* get frame len */
245  3, s->decode_flags);
247 
248  /* init previous block len */
249  for (i = 0; i < avctx->channels; i++)
251 
252  /* subframe info */
253  log2_max_num_subframes = (s->decode_flags & 0x38) >> 3;
254  s->max_num_subframes = 1 << log2_max_num_subframes;
255  s->max_subframe_len_bit = 0;
256  s->subframe_len_bits = av_log2(log2_max_num_subframes) + 1;
257 
260  s->bV3RTM = s->decode_flags & 0x100;
261 
262  if (s->max_num_subframes > MAX_SUBFRAMES) {
263  av_log(avctx, AV_LOG_ERROR, "invalid number of subframes %"PRIu8"\n",
264  s->max_num_subframes);
265  return AVERROR_INVALIDDATA;
266  }
267 
268  s->num_channels = avctx->channels;
269 
270  /* extract lfe channel position */
271  s->lfe_channel = -1;
272 
273  if (channel_mask & 8) {
274  unsigned int mask;
275  for (mask = 1; mask < 16; mask <<= 1)
276  if (channel_mask & mask)
277  ++s->lfe_channel;
278  }
279 
280  s->frame = av_frame_alloc();
281  if (!s->frame)
282  return AVERROR(ENOMEM);
283 
284  avctx->channel_layout = channel_mask;
285  return 0;
286 }
287 
288 /**
289  * @brief Decode the subframe length.
290  * @param s context
291  * @param offset sample offset in the frame
292  * @return decoded subframe length on success, < 0 in case of an error
293  */
295 {
296  int frame_len_ratio, subframe_len, len;
297 
298  /* no need to read from the bitstream when only one length is possible */
299  if (offset == s->samples_per_frame - s->min_samples_per_subframe)
300  return s->min_samples_per_subframe;
301 
302  len = av_log2(s->max_num_subframes - 1) + 1;
303  frame_len_ratio = get_bits(&s->gb, len);
304  subframe_len = s->min_samples_per_subframe * (frame_len_ratio + 1);
305 
306  /* sanity check the length */
307  if (subframe_len < s->min_samples_per_subframe ||
308  subframe_len > s->samples_per_frame) {
309  av_log(s->avctx, AV_LOG_ERROR, "broken frame: subframe_len %i\n",
310  subframe_len);
311  return AVERROR_INVALIDDATA;
312  }
313  return subframe_len;
314 }
315 
316 /**
317  * @brief Decode how the data in the frame is split into subframes.
318  * Every WMA frame contains the encoded data for a fixed number of
319  * samples per channel. The data for every channel might be split
320  * into several subframes. This function will reconstruct the list of
321  * subframes for every channel.
322  *
323  * If the subframes are not evenly split, the algorithm estimates the
324  * channels with the lowest number of total samples.
325  * Afterwards, for each of these channels a bit is read from the
326  * bitstream that indicates if the channel contains a subframe with the
327  * next subframe size that is going to be read from the bitstream or not.
328  * If a channel contains such a subframe, the subframe size gets added to
329  * the channel's subframe list.
330  * The algorithm repeats these steps until the frame is properly divided
331  * between the individual channels.
332  *
333  * @param s context
334  * @return 0 on success, < 0 in case of an error
335  */
337 {
338  uint16_t num_samples[WMALL_MAX_CHANNELS] = { 0 }; /* sum of samples for all currently known subframes of a channel */
339  uint8_t contains_subframe[WMALL_MAX_CHANNELS]; /* flag indicating if a channel contains the current subframe */
340  int channels_for_cur_subframe = s->num_channels; /* number of channels that contain the current subframe */
341  int fixed_channel_layout = 0; /* flag indicating that all channels use the same subfra2me offsets and sizes */
342  int min_channel_len = 0; /* smallest sum of samples (channels with this length will be processed first) */
343  int c, tile_aligned;
344 
345  /* reset tiling information */
346  for (c = 0; c < s->num_channels; c++)
347  s->channel[c].num_subframes = 0;
348 
349  tile_aligned = get_bits1(&s->gb);
350  if (s->max_num_subframes == 1 || tile_aligned)
351  fixed_channel_layout = 1;
352 
353  /* loop until the frame data is split between the subframes */
354  do {
355  int subframe_len, in_use = 0;
356 
357  /* check which channels contain the subframe */
358  for (c = 0; c < s->num_channels; c++) {
359  if (num_samples[c] == min_channel_len) {
360  if (fixed_channel_layout || channels_for_cur_subframe == 1 ||
361  (min_channel_len == s->samples_per_frame - s->min_samples_per_subframe)) {
362  contains_subframe[c] = 1;
363  } else {
364  contains_subframe[c] = get_bits1(&s->gb);
365  }
366  in_use |= contains_subframe[c];
367  } else
368  contains_subframe[c] = 0;
369  }
370 
371  if (!in_use) {
373  "Found empty subframe\n");
374  return AVERROR_INVALIDDATA;
375  }
376 
377  /* get subframe length, subframe_len == 0 is not allowed */
378  if ((subframe_len = decode_subframe_length(s, min_channel_len)) <= 0)
379  return AVERROR_INVALIDDATA;
380  /* add subframes to the individual channels and find new min_channel_len */
381  min_channel_len += subframe_len;
382  for (c = 0; c < s->num_channels; c++) {
383  WmallChannelCtx *chan = &s->channel[c];
384 
385  if (contains_subframe[c]) {
386  if (chan->num_subframes >= MAX_SUBFRAMES) {
388  "broken frame: num subframes > 31\n");
389  return AVERROR_INVALIDDATA;
390  }
391  chan->subframe_len[chan->num_subframes] = subframe_len;
392  num_samples[c] += subframe_len;
393  ++chan->num_subframes;
394  if (num_samples[c] > s->samples_per_frame) {
395  av_log(s->avctx, AV_LOG_ERROR, "broken frame: "
396  "channel len(%"PRIu16") > samples_per_frame(%"PRIu16")\n",
397  num_samples[c], s->samples_per_frame);
398  return AVERROR_INVALIDDATA;
399  }
400  } else if (num_samples[c] <= min_channel_len) {
401  if (num_samples[c] < min_channel_len) {
402  channels_for_cur_subframe = 0;
403  min_channel_len = num_samples[c];
404  }
405  ++channels_for_cur_subframe;
406  }
407  }
408  } while (min_channel_len < s->samples_per_frame);
409 
410  for (c = 0; c < s->num_channels; c++) {
411  int i, offset = 0;
412  for (i = 0; i < s->channel[c].num_subframes; i++) {
414  offset += s->channel[c].subframe_len[i];
415  }
416  }
417 
418  return 0;
419 }
420 
422 {
423  int i;
424  s->acfilter_order = get_bits(&s->gb, 4) + 1;
425  s->acfilter_scaling = get_bits(&s->gb, 4);
426 
427  for (i = 0; i < s->acfilter_order; i++)
428  s->acfilter_coeffs[i] = get_bitsz(&s->gb, s->acfilter_scaling) + 1;
429 }
430 
432 {
433  s->mclms_order = (get_bits(&s->gb, 4) + 1) * 2;
434  s->mclms_scaling = get_bits(&s->gb, 4);
435  if (get_bits1(&s->gb)) {
436  int i, send_coef_bits;
437  int cbits = av_log2(s->mclms_scaling + 1);
438  if (1 << cbits < s->mclms_scaling + 1)
439  cbits++;
440 
441  send_coef_bits = get_bitsz(&s->gb, cbits) + 2;
442 
443  for (i = 0; i < s->mclms_order * s->num_channels * s->num_channels; i++)
444  s->mclms_coeffs[i] = get_bits(&s->gb, send_coef_bits);
445 
446  for (i = 0; i < s->num_channels; i++) {
447  int c;
448  for (c = 0; c < i; c++)
449  s->mclms_coeffs_cur[i * s->num_channels + c] = get_bits(&s->gb, send_coef_bits);
450  }
451  }
452 }
453 
455 {
456  int c, i;
457  int cdlms_send_coef = get_bits1(&s->gb);
458 
459  for (c = 0; c < s->num_channels; c++) {
460  s->cdlms_ttl[c] = get_bits(&s->gb, 3) + 1;
461  for (i = 0; i < s->cdlms_ttl[c]; i++) {
462  s->cdlms[c][i].order = (get_bits(&s->gb, 7) + 1) * 8;
463  if (s->cdlms[c][i].order > MAX_ORDER) {
465  "Order[%d][%d] %d > max (%d), not supported\n",
466  c, i, s->cdlms[c][i].order, MAX_ORDER);
467  s->cdlms[0][0].order = 0;
468  return AVERROR_INVALIDDATA;
469  }
470  if(s->cdlms[c][i].order & 8 && s->bits_per_sample == 16) {
471  static int warned;
472  if(!warned)
473  avpriv_request_sample(s->avctx, "CDLMS of order %d",
474  s->cdlms[c][i].order);
475  warned = 1;
476  }
477  }
478 
479  for (i = 0; i < s->cdlms_ttl[c]; i++)
480  s->cdlms[c][i].scaling = get_bits(&s->gb, 4);
481 
482  if (cdlms_send_coef) {
483  for (i = 0; i < s->cdlms_ttl[c]; i++) {
484  int cbits, shift_l, shift_r, j;
485  cbits = av_log2(s->cdlms[c][i].order);
486  if ((1 << cbits) < s->cdlms[c][i].order)
487  cbits++;
488  s->cdlms[c][i].coefsend = get_bits(&s->gb, cbits) + 1;
489 
490  cbits = av_log2(s->cdlms[c][i].scaling + 1);
491  if ((1 << cbits) < s->cdlms[c][i].scaling + 1)
492  cbits++;
493 
494  s->cdlms[c][i].bitsend = get_bitsz(&s->gb, cbits) + 2;
495  shift_l = 32 - s->cdlms[c][i].bitsend;
496  shift_r = 32 - s->cdlms[c][i].scaling - 2;
497  for (j = 0; j < s->cdlms[c][i].coefsend; j++)
498  s->cdlms[c][i].coefs[j] =
499  (get_bits(&s->gb, s->cdlms[c][i].bitsend) << shift_l) >> shift_r;
500  }
501  }
502 
503  for (i = 0; i < s->cdlms_ttl[c]; i++)
504  memset(s->cdlms[c][i].coefs + s->cdlms[c][i].order,
506  }
507 
508  return 0;
509 }
510 
511 static int decode_channel_residues(WmallDecodeCtx *s, int ch, int tile_size)
512 {
513  int i = 0;
514  unsigned int ave_mean;
515  s->transient[ch] = get_bits1(&s->gb);
516  if (s->transient[ch]) {
517  s->transient_pos[ch] = get_bits(&s->gb, av_log2(tile_size));
518  if (s->transient_pos[ch])
519  s->transient[ch] = 0;
522  } else if (s->channel[ch].transient_counter)
523  s->transient[ch] = 1;
524 
525  if (s->seekable_tile) {
526  ave_mean = get_bits(&s->gb, s->bits_per_sample);
527  s->ave_sum[ch] = ave_mean << (s->movave_scaling + 1);
528  }
529 
530  if (s->seekable_tile) {
531  if (s->do_inter_ch_decorr)
532  s->channel_residues[ch][0] = get_sbits_long(&s->gb, s->bits_per_sample + 1);
533  else
535  i++;
536  }
537  for (; i < tile_size; i++) {
538  int rem, rem_bits;
539  unsigned quo = 0, residue;
540  while(get_bits1(&s->gb)) {
541  quo++;
542  if (get_bits_left(&s->gb) <= 0)
543  return -1;
544  }
545  if (quo >= 32)
546  quo += get_bits_long(&s->gb, get_bits(&s->gb, 5) + 1);
547 
548  ave_mean = (s->ave_sum[ch] + (1 << s->movave_scaling)) >> (s->movave_scaling + 1);
549  if (ave_mean <= 1)
550  residue = quo;
551  else {
552  rem_bits = av_ceil_log2(ave_mean);
553  rem = get_bits_long(&s->gb, rem_bits);
554  residue = (quo << rem_bits) + rem;
555  }
556 
557  s->ave_sum[ch] = residue + s->ave_sum[ch] -
558  (s->ave_sum[ch] >> s->movave_scaling);
559 
560  residue = (residue >> 1) ^ -(residue & 1);
561  s->channel_residues[ch][i] = residue;
562  }
563 
564  return 0;
565 
566 }
567 
569 {
570  int ch, i, cbits;
571  s->lpc_order = get_bits(&s->gb, 5) + 1;
572  s->lpc_scaling = get_bits(&s->gb, 4);
573  s->lpc_intbits = get_bits(&s->gb, 3) + 1;
574  cbits = s->lpc_scaling + s->lpc_intbits;
575  for (ch = 0; ch < s->num_channels; ch++)
576  for (i = 0; i < s->lpc_order; i++)
577  s->lpc_coefs[ch][i] = get_sbits(&s->gb, cbits);
578 }
579 
581 {
582  int ich, ilms;
583 
584  memset(s->acfilter_coeffs, 0, sizeof(s->acfilter_coeffs));
585  memset(s->acfilter_prevvalues, 0, sizeof(s->acfilter_prevvalues));
586  memset(s->lpc_coefs, 0, sizeof(s->lpc_coefs));
587 
588  memset(s->mclms_coeffs, 0, sizeof(s->mclms_coeffs));
589  memset(s->mclms_coeffs_cur, 0, sizeof(s->mclms_coeffs_cur));
590  memset(s->mclms_prevvalues, 0, sizeof(s->mclms_prevvalues));
591  memset(s->mclms_updates, 0, sizeof(s->mclms_updates));
592 
593  for (ich = 0; ich < s->num_channels; ich++) {
594  for (ilms = 0; ilms < s->cdlms_ttl[ich]; ilms++) {
595  memset(s->cdlms[ich][ilms].coefs, 0,
596  sizeof(s->cdlms[ich][ilms].coefs));
597  memset(s->cdlms[ich][ilms].lms_prevvalues, 0,
598  sizeof(s->cdlms[ich][ilms].lms_prevvalues));
599  memset(s->cdlms[ich][ilms].lms_updates, 0,
600  sizeof(s->cdlms[ich][ilms].lms_updates));
601  }
602  s->ave_sum[ich] = 0;
603  }
604 }
605 
606 /**
607  * @brief Reset filter parameters and transient area at new seekable tile.
608  */
610 {
611  int ich, ilms;
613  for (ich = 0; ich < s->num_channels; ich++) {
614  for (ilms = 0; ilms < s->cdlms_ttl[ich]; ilms++)
615  s->cdlms[ich][ilms].recent = s->cdlms[ich][ilms].order;
616  /* first sample of a seekable subframe is considered as the starting of
617  a transient area which is samples_per_frame samples long */
619  s->transient[ich] = 1;
620  s->transient_pos[ich] = 0;
621  }
622 }
623 
624 static void mclms_update(WmallDecodeCtx *s, int icoef, int *pred)
625 {
626  int i, j, ich, pred_error;
627  int order = s->mclms_order;
628  int num_channels = s->num_channels;
629  int range = 1 << (s->bits_per_sample - 1);
630 
631  for (ich = 0; ich < num_channels; ich++) {
632  pred_error = s->channel_residues[ich][icoef] - (unsigned)pred[ich];
633  if (pred_error > 0) {
634  for (i = 0; i < order * num_channels; i++)
635  s->mclms_coeffs[i + ich * order * num_channels] +=
636  s->mclms_updates[s->mclms_recent + i];
637  for (j = 0; j < ich; j++)
638  s->mclms_coeffs_cur[ich * num_channels + j] += WMASIGN(s->channel_residues[j][icoef]);
639  } else if (pred_error < 0) {
640  for (i = 0; i < order * num_channels; i++)
641  s->mclms_coeffs[i + ich * order * num_channels] -=
642  s->mclms_updates[s->mclms_recent + i];
643  for (j = 0; j < ich; j++)
644  s->mclms_coeffs_cur[ich * num_channels + j] -= WMASIGN(s->channel_residues[j][icoef]);
645  }
646  }
647 
648  for (ich = num_channels - 1; ich >= 0; ich--) {
649  s->mclms_recent--;
650  s->mclms_prevvalues[s->mclms_recent] = av_clip(s->channel_residues[ich][icoef],
651  -range, range - 1);
652  s->mclms_updates[s->mclms_recent] = WMASIGN(s->channel_residues[ich][icoef]);
653  }
654 
655  if (s->mclms_recent == 0) {
656  memcpy(&s->mclms_prevvalues[order * num_channels],
657  s->mclms_prevvalues,
658  sizeof(int32_t) * order * num_channels);
659  memcpy(&s->mclms_updates[order * num_channels],
660  s->mclms_updates,
661  sizeof(int32_t) * order * num_channels);
662  s->mclms_recent = num_channels * order;
663  }
664 }
665 
666 static void mclms_predict(WmallDecodeCtx *s, int icoef, int *pred)
667 {
668  int ich, i;
669  int order = s->mclms_order;
670  int num_channels = s->num_channels;
671 
672  for (ich = 0; ich < num_channels; ich++) {
673  pred[ich] = 0;
674  if (!s->is_channel_coded[ich])
675  continue;
676  for (i = 0; i < order * num_channels; i++)
677  pred[ich] += (uint32_t)s->mclms_prevvalues[i + s->mclms_recent] *
678  s->mclms_coeffs[i + order * num_channels * ich];
679  for (i = 0; i < ich; i++)
680  pred[ich] += (uint32_t)s->channel_residues[i][icoef] *
681  s->mclms_coeffs_cur[i + num_channels * ich];
682  pred[ich] += (1 << s->mclms_scaling) >> 1;
683  pred[ich] >>= s->mclms_scaling;
684  s->channel_residues[ich][icoef] += (unsigned)pred[ich];
685  }
686 }
687 
688 static void revert_mclms(WmallDecodeCtx *s, int tile_size)
689 {
690  int icoef, pred[WMALL_MAX_CHANNELS] = { 0 };
691  for (icoef = 0; icoef < tile_size; icoef++) {
692  mclms_predict(s, icoef, pred);
693  mclms_update(s, icoef, pred);
694  }
695 }
696 
697 static void use_high_update_speed(WmallDecodeCtx *s, int ich)
698 {
699  int ilms, recent, icoef;
700  for (ilms = s->cdlms_ttl[ich] - 1; ilms >= 0; ilms--) {
701  recent = s->cdlms[ich][ilms].recent;
702  if (s->update_speed[ich] == 16)
703  continue;
704  if (s->bV3RTM) {
705  for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
706  s->cdlms[ich][ilms].lms_updates[icoef + recent] *= 2;
707  } else {
708  for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
709  s->cdlms[ich][ilms].lms_updates[icoef] *= 2;
710  }
711  }
712  s->update_speed[ich] = 16;
713 }
714 
716 {
717  int ilms, recent, icoef;
718  for (ilms = s->cdlms_ttl[ich] - 1; ilms >= 0; ilms--) {
719  recent = s->cdlms[ich][ilms].recent;
720  if (s->update_speed[ich] == 8)
721  continue;
722  if (s->bV3RTM)
723  for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
724  s->cdlms[ich][ilms].lms_updates[icoef + recent] /= 2;
725  else
726  for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
727  s->cdlms[ich][ilms].lms_updates[icoef] /= 2;
728  }
729  s->update_speed[ich] = 8;
730 }
731 
732 #define CD_LMS(bits, ROUND) \
733 static void lms_update ## bits (WmallDecodeCtx *s, int ich, int ilms, int input) \
734 { \
735  int recent = s->cdlms[ich][ilms].recent; \
736  int range = 1 << s->bits_per_sample - 1; \
737  int order = s->cdlms[ich][ilms].order; \
738  int ##bits##_t *prev = (int##bits##_t *)s->cdlms[ich][ilms].lms_prevvalues; \
739  \
740  if (recent) \
741  recent--; \
742  else { \
743  memcpy(prev + order, prev, (bits/8) * order); \
744  memcpy(s->cdlms[ich][ilms].lms_updates + order, \
745  s->cdlms[ich][ilms].lms_updates, \
746  sizeof(*s->cdlms[ich][ilms].lms_updates) * order); \
747  recent = order - 1; \
748  } \
749  \
750  prev[recent] = av_clip(input, -range, range - 1); \
751  s->cdlms[ich][ilms].lms_updates[recent] = WMASIGN(input) * s->update_speed[ich]; \
752  \
753  s->cdlms[ich][ilms].lms_updates[recent + (order >> 4)] >>= 2; \
754  s->cdlms[ich][ilms].lms_updates[recent + (order >> 3)] >>= 1; \
755  s->cdlms[ich][ilms].recent = recent; \
756  memset(s->cdlms[ich][ilms].lms_updates + recent + order, 0, \
757  sizeof(s->cdlms[ich][ilms].lms_updates) - \
758  sizeof(*s->cdlms[ich][ilms].lms_updates)*(recent+order)); \
759 } \
760  \
761 static void revert_cdlms ## bits (WmallDecodeCtx *s, int ch, \
762  int coef_begin, int coef_end) \
763 { \
764  int icoef, pred, ilms, num_lms, residue, input; \
765  \
766  num_lms = s->cdlms_ttl[ch]; \
767  for (ilms = num_lms - 1; ilms >= 0; ilms--) { \
768  for (icoef = coef_begin; icoef < coef_end; icoef++) { \
769  int##bits##_t *prevvalues = (int##bits##_t *)s->cdlms[ch][ilms].lms_prevvalues; \
770  pred = (1 << s->cdlms[ch][ilms].scaling) >> 1; \
771  residue = s->channel_residues[ch][icoef]; \
772  pred += s->dsp.scalarproduct_and_madd_int## bits (s->cdlms[ch][ilms].coefs, \
773  prevvalues + s->cdlms[ch][ilms].recent, \
774  s->cdlms[ch][ilms].lms_updates + \
775  s->cdlms[ch][ilms].recent, \
776  FFALIGN(s->cdlms[ch][ilms].order, ROUND), \
777  WMASIGN(residue)); \
778  input = residue + (unsigned)(pred >> s->cdlms[ch][ilms].scaling); \
779  lms_update ## bits(s, ch, ilms, input); \
780  s->channel_residues[ch][icoef] = input; \
781  } \
782  } \
783  if (bits <= 16) emms_c(); \
784 }
785 
787 CD_LMS(32, 8)
788 
789 static void revert_inter_ch_decorr(WmallDecodeCtx *s, int tile_size)
790 {
791  if (s->num_channels != 2)
792  return;
793  else if (s->is_channel_coded[0] || s->is_channel_coded[1]) {
794  int icoef;
795  for (icoef = 0; icoef < tile_size; icoef++) {
796  s->channel_residues[0][icoef] -= (unsigned)(s->channel_residues[1][icoef] >> 1);
797  s->channel_residues[1][icoef] += (unsigned) s->channel_residues[0][icoef];
798  }
799  }
800 }
801 
802 static void revert_acfilter(WmallDecodeCtx *s, int tile_size)
803 {
804  int ich, pred, i, j;
805  int16_t *filter_coeffs = s->acfilter_coeffs;
806  int scaling = s->acfilter_scaling;
807  int order = s->acfilter_order;
808 
809  for (ich = 0; ich < s->num_channels; ich++) {
810  int *prevvalues = s->acfilter_prevvalues[ich];
811  for (i = 0; i < order; i++) {
812  pred = 0;
813  for (j = 0; j < order; j++) {
814  if (i <= j)
815  pred += (uint32_t)filter_coeffs[j] * prevvalues[j - i];
816  else
817  pred += (uint32_t)s->channel_residues[ich][i - j - 1] * filter_coeffs[j];
818  }
819  pred >>= scaling;
820  s->channel_residues[ich][i] += (unsigned)pred;
821  }
822  for (i = order; i < tile_size; i++) {
823  pred = 0;
824  for (j = 0; j < order; j++)
825  pred += (uint32_t)s->channel_residues[ich][i - j - 1] * filter_coeffs[j];
826  pred >>= scaling;
827  s->channel_residues[ich][i] += (unsigned)pred;
828  }
829  for (j = order - 1; j >= 0; j--)
830  if (tile_size <= j) {
831  prevvalues[j] = prevvalues[j - tile_size];
832  }else
833  prevvalues[j] = s->channel_residues[ich][tile_size - j - 1];
834  }
835 }
836 
838 {
839  int offset = s->samples_per_frame;
841  int total_samples = s->samples_per_frame * s->num_channels;
842  int i, j, rawpcm_tile, padding_zeroes, res;
843 
845 
846  /* reset channel context and find the next block offset and size
847  == the next block of the channel with the smallest number of
848  decoded samples */
849  for (i = 0; i < s->num_channels; i++) {
850  if (offset > s->channel[i].decoded_samples) {
851  offset = s->channel[i].decoded_samples;
852  subframe_len =
854  }
855  }
856 
857  /* get a list of all channels that contain the estimated block */
859  for (i = 0; i < s->num_channels; i++) {
860  const int cur_subframe = s->channel[i].cur_subframe;
861  /* subtract already processed samples */
862  total_samples -= s->channel[i].decoded_samples;
863 
864  /* and count if there are multiple subframes that match our profile */
865  if (offset == s->channel[i].decoded_samples &&
866  subframe_len == s->channel[i].subframe_len[cur_subframe]) {
867  total_samples -= s->channel[i].subframe_len[cur_subframe];
868  s->channel[i].decoded_samples +=
872  }
873  }
874 
875  /* check if the frame will be complete after processing the
876  estimated block */
877  if (!total_samples)
878  s->parsed_all_subframes = 1;
879 
880 
881  s->seekable_tile = get_bits1(&s->gb);
882  if (s->seekable_tile) {
884 
885  s->do_arith_coding = get_bits1(&s->gb);
886  if (s->do_arith_coding) {
887  avpriv_request_sample(s->avctx, "Arithmetic coding");
888  return AVERROR_PATCHWELCOME;
889  }
890  s->do_ac_filter = get_bits1(&s->gb);
891  s->do_inter_ch_decorr = get_bits1(&s->gb);
892  s->do_mclms = get_bits1(&s->gb);
893 
894  if (s->do_ac_filter)
895  decode_ac_filter(s);
896 
897  if (s->do_mclms)
898  decode_mclms(s);
899 
900  if ((res = decode_cdlms(s)) < 0)
901  return res;
902  s->movave_scaling = get_bits(&s->gb, 3);
903  s->quant_stepsize = get_bits(&s->gb, 8) + 1;
904 
905  reset_codec(s);
906  }
907 
908  rawpcm_tile = get_bits1(&s->gb);
909 
910  if (!rawpcm_tile && !s->cdlms[0][0].order) {
912  "Waiting for seekable tile\n");
913  av_frame_unref(s->frame);
914  return -1;
915  }
916 
917 
918  for (i = 0; i < s->num_channels; i++)
919  s->is_channel_coded[i] = 1;
920 
921  if (!rawpcm_tile) {
922  for (i = 0; i < s->num_channels; i++)
923  s->is_channel_coded[i] = get_bits1(&s->gb);
924 
925  if (s->bV3RTM) {
926  // LPC
927  s->do_lpc = get_bits1(&s->gb);
928  if (s->do_lpc) {
929  decode_lpc(s);
930  avpriv_request_sample(s->avctx, "Expect wrong output since "
931  "inverse LPC filter");
932  }
933  } else
934  s->do_lpc = 0;
935  }
936 
937 
938  if (get_bits1(&s->gb))
939  padding_zeroes = get_bits(&s->gb, 5);
940  else
941  padding_zeroes = 0;
942 
943  if (rawpcm_tile) {
944  int bits = s->bits_per_sample - padding_zeroes;
945  if (bits <= 0) {
947  "Invalid number of padding bits in raw PCM tile\n");
948  return AVERROR_INVALIDDATA;
949  }
950  ff_dlog(s->avctx, "RAWPCM %d bits per sample. "
951  "total %d bits, remain=%d\n", bits,
952  bits * s->num_channels * subframe_len, get_bits_count(&s->gb));
953  for (i = 0; i < s->num_channels; i++)
954  for (j = 0; j < subframe_len; j++)
955  s->channel_residues[i][j] = get_sbits_long(&s->gb, bits);
956  } else {
957  if (s->bits_per_sample < padding_zeroes)
958  return AVERROR_INVALIDDATA;
959  for (i = 0; i < s->num_channels; i++) {
960  if (s->is_channel_coded[i]) {
961  decode_channel_residues(s, i, subframe_len);
962  if (s->seekable_tile)
963  use_high_update_speed(s, i);
964  else
966  if (s->bits_per_sample > 16)
967  revert_cdlms32(s, i, 0, subframe_len);
968  else
969  revert_cdlms16(s, i, 0, subframe_len);
970  } else {
971  memset(s->channel_residues[i], 0, sizeof(**s->channel_residues) * subframe_len);
972  }
973  }
974 
975  if (s->do_mclms)
976  revert_mclms(s, subframe_len);
977  if (s->do_inter_ch_decorr)
978  revert_inter_ch_decorr(s, subframe_len);
979  if (s->do_ac_filter)
980  revert_acfilter(s, subframe_len);
981 
982  /* Dequantize */
983  if (s->quant_stepsize != 1)
984  for (i = 0; i < s->num_channels; i++)
985  for (j = 0; j < subframe_len; j++)
986  s->channel_residues[i][j] *= (unsigned)s->quant_stepsize;
987  }
988 
989  /* Write to proper output buffer depending on bit-depth */
990  for (i = 0; i < s->channels_for_cur_subframe; i++) {
992  int subframe_len = s->channel[c].subframe_len[s->channel[c].cur_subframe];
993 
994  for (j = 0; j < subframe_len; j++) {
995  if (s->bits_per_sample == 16) {
996  *s->samples_16[c]++ = (int16_t) s->channel_residues[c][j] * (1 << padding_zeroes);
997  } else {
998  *s->samples_32[c]++ = s->channel_residues[c][j] * (256U << padding_zeroes);
999  }
1000  }
1001  }
1002 
1003  /* handled one subframe */
1004  for (i = 0; i < s->channels_for_cur_subframe; i++) {
1006  if (s->channel[c].cur_subframe >= s->channel[c].num_subframes) {
1007  av_log(s->avctx, AV_LOG_ERROR, "broken subframe\n");
1008  return AVERROR_INVALIDDATA;
1009  }
1010  ++s->channel[c].cur_subframe;
1011  }
1012  return 0;
1013 }
1014 
1015 /**
1016  * @brief Decode one WMA frame.
1017  * @param s codec context
1018  * @return 0 if the trailer bit indicates that this is the last frame,
1019  * 1 if there are additional frames
1020  */
1022 {
1023  GetBitContext* gb = &s->gb;
1024  int more_frames = 0, len = 0, i, ret;
1025 
1027  if ((ret = ff_get_buffer(s->avctx, s->frame, 0)) < 0) {
1028  /* return an error if no frame could be decoded at all */
1029  s->packet_loss = 1;
1030  s->frame->nb_samples = 0;
1031  return ret;
1032  }
1033  for (i = 0; i < s->num_channels; i++) {
1034  s->samples_16[i] = (int16_t *)s->frame->extended_data[i];
1035  s->samples_32[i] = (int32_t *)s->frame->extended_data[i];
1036  }
1037 
1038  /* get frame length */
1039  if (s->len_prefix)
1040  len = get_bits(gb, s->log2_frame_size);
1041 
1042  /* decode tile information */
1043  if ((ret = decode_tilehdr(s))) {
1044  s->packet_loss = 1;
1045  av_frame_unref(s->frame);
1046  return ret;
1047  }
1048 
1049  /* read drc info */
1051  s->drc_gain = get_bits(gb, 8);
1052 
1053  /* no idea what these are for, might be the number of samples
1054  that need to be skipped at the beginning or end of a stream */
1055  if (get_bits1(gb)) {
1056  int av_unused skip;
1057 
1058  /* usually true for the first frame */
1059  if (get_bits1(gb)) {
1060  skip = get_bits(gb, av_log2(s->samples_per_frame * 2));
1061  ff_dlog(s->avctx, "start skip: %i\n", skip);
1062  }
1063 
1064  /* sometimes true for the last frame */
1065  if (get_bits1(gb)) {
1066  skip = get_bits(gb, av_log2(s->samples_per_frame * 2));
1067  ff_dlog(s->avctx, "end skip: %i\n", skip);
1068  s->frame->nb_samples -= skip;
1069  if (s->frame->nb_samples <= 0)
1070  return AVERROR_INVALIDDATA;
1071  }
1072 
1073  }
1074 
1075  /* reset subframe states */
1076  s->parsed_all_subframes = 0;
1077  for (i = 0; i < s->num_channels; i++) {
1078  s->channel[i].decoded_samples = 0;
1079  s->channel[i].cur_subframe = 0;
1080  }
1081 
1082  /* decode all subframes */
1083  while (!s->parsed_all_subframes) {
1085  if (decode_subframe(s) < 0) {
1086  s->packet_loss = 1;
1087  if (s->frame->nb_samples)
1089  return 0;
1090  }
1091  }
1092 
1093  ff_dlog(s->avctx, "Frame done\n");
1094 
1095  s->skip_frame = 0;
1096 
1097  if (s->len_prefix) {
1098  if (len != (get_bits_count(gb) - s->frame_offset) + 2) {
1099  /* FIXME: not sure if this is always an error */
1101  "frame[%"PRIu32"] would have to skip %i bits\n",
1102  s->frame_num,
1103  len - (get_bits_count(gb) - s->frame_offset) - 1);
1104  s->packet_loss = 1;
1105  return 0;
1106  }
1107 
1108  /* skip the rest of the frame data */
1109  skip_bits_long(gb, len - (get_bits_count(gb) - s->frame_offset) - 1);
1110  }
1111 
1112  /* decode trailer bit */
1113  more_frames = get_bits1(gb);
1114  ++s->frame_num;
1115  return more_frames;
1116 }
1117 
1118 /**
1119  * @brief Calculate remaining input buffer length.
1120  * @param s codec context
1121  * @param gb bitstream reader context
1122  * @return remaining size in bits
1123  */
1125 {
1126  return s->buf_bit_size - get_bits_count(gb);
1127 }
1128 
1129 /**
1130  * @brief Fill the bit reservoir with a (partial) frame.
1131  * @param s codec context
1132  * @param gb bitstream reader context
1133  * @param len length of the partial frame
1134  * @param append decides whether to reset the buffer or not
1135  */
1136 static void save_bits(WmallDecodeCtx *s, GetBitContext* gb, int len,
1137  int append)
1138 {
1139  int buflen;
1141 
1142  /* when the frame data does not need to be concatenated, the input buffer
1143  is reset and additional bits from the previous frame are copied
1144  and skipped later so that a fast byte copy is possible */
1145 
1146  if (!append) {
1147  s->frame_offset = get_bits_count(gb) & 7;
1148  s->num_saved_bits = s->frame_offset;
1150  }
1151 
1152  buflen = (s->num_saved_bits + len + 8) >> 3;
1153 
1154  if (len <= 0 || buflen > s->max_frame_size) {
1155  avpriv_request_sample(s->avctx, "Too small input buffer");
1156  s->packet_loss = 1;
1157  s->num_saved_bits = 0;
1158  return;
1159  }
1160 
1161  s->num_saved_bits += len;
1162  if (!append) {
1163  avpriv_copy_bits(&s->pb, gb->buffer + (get_bits_count(gb) >> 3),
1164  s->num_saved_bits);
1165  } else {
1166  int align = 8 - (get_bits_count(gb) & 7);
1167  align = FFMIN(align, len);
1168  put_bits(&s->pb, align, get_bits(gb, align));
1169  len -= align;
1170  avpriv_copy_bits(&s->pb, gb->buffer + (get_bits_count(gb) >> 3), len);
1171  }
1172  skip_bits_long(gb, len);
1173 
1174  tmp = s->pb;
1175  flush_put_bits(&tmp);
1176 
1178  skip_bits(&s->gb, s->frame_offset);
1179 }
1180 
1181 static int decode_packet(AVCodecContext *avctx, void *data, int *got_frame_ptr,
1182  AVPacket* avpkt)
1183 {
1184  WmallDecodeCtx *s = avctx->priv_data;
1185  GetBitContext* gb = &s->pgb;
1186  const uint8_t* buf = avpkt->data;
1187  int buf_size = avpkt->size;
1188  int num_bits_prev_frame, packet_sequence_number, spliced_packet;
1189 
1190  s->frame->nb_samples = 0;
1191 
1192  if (!buf_size && s->num_saved_bits > get_bits_count(&s->gb)) {
1193  s->packet_done = 0;
1194  if (!decode_frame(s))
1195  s->num_saved_bits = 0;
1196  } else if (s->packet_done || s->packet_loss) {
1197  s->packet_done = 0;
1198 
1199  if (!buf_size)
1200  return 0;
1201 
1202  s->next_packet_start = buf_size - FFMIN(avctx->block_align, buf_size);
1203  buf_size = FFMIN(avctx->block_align, buf_size);
1204  s->buf_bit_size = buf_size << 3;
1205 
1206  /* parse packet header */
1207  init_get_bits(gb, buf, s->buf_bit_size);
1208  packet_sequence_number = get_bits(gb, 4);
1209  skip_bits(gb, 1); // Skip seekable_frame_in_packet, currently unused
1210  spliced_packet = get_bits1(gb);
1211  if (spliced_packet)
1212  avpriv_request_sample(avctx, "Bitstream splicing");
1213 
1214  /* get number of bits that need to be added to the previous frame */
1215  num_bits_prev_frame = get_bits(gb, s->log2_frame_size);
1216 
1217  /* check for packet loss */
1218  if (!s->packet_loss &&
1219  ((s->packet_sequence_number + 1) & 0xF) != packet_sequence_number) {
1220  s->packet_loss = 1;
1221  av_log(avctx, AV_LOG_ERROR,
1222  "Packet loss detected! seq %"PRIx8" vs %x\n",
1223  s->packet_sequence_number, packet_sequence_number);
1224  }
1225  s->packet_sequence_number = packet_sequence_number;
1226 
1227  if (num_bits_prev_frame > 0) {
1228  int remaining_packet_bits = s->buf_bit_size - get_bits_count(gb);
1229  if (num_bits_prev_frame >= remaining_packet_bits) {
1230  num_bits_prev_frame = remaining_packet_bits;
1231  s->packet_done = 1;
1232  }
1233 
1234  /* Append the previous frame data to the remaining data from the
1235  * previous packet to create a full frame. */
1236  save_bits(s, gb, num_bits_prev_frame, 1);
1237 
1238  /* decode the cross packet frame if it is valid */
1239  if (num_bits_prev_frame < remaining_packet_bits && !s->packet_loss)
1240  decode_frame(s);
1241  } else if (s->num_saved_bits - s->frame_offset) {
1242  ff_dlog(avctx, "ignoring %x previously saved bits\n",
1243  s->num_saved_bits - s->frame_offset);
1244  }
1245 
1246  if (s->packet_loss) {
1247  /* Reset number of saved bits so that the decoder does not start
1248  * to decode incomplete frames in the s->len_prefix == 0 case. */
1249  s->num_saved_bits = 0;
1250  s->packet_loss = 0;
1252  }
1253 
1254  } else {
1255  int frame_size;
1256 
1257  s->buf_bit_size = (avpkt->size - s->next_packet_start) << 3;
1258  init_get_bits(gb, avpkt->data, s->buf_bit_size);
1259  skip_bits(gb, s->packet_offset);
1260 
1261  if (s->len_prefix && remaining_bits(s, gb) > s->log2_frame_size &&
1262  (frame_size = show_bits(gb, s->log2_frame_size)) &&
1263  frame_size <= remaining_bits(s, gb)) {
1264  save_bits(s, gb, frame_size, 0);
1265 
1266  if (!s->packet_loss)
1267  s->packet_done = !decode_frame(s);
1268  } else if (!s->len_prefix
1269  && s->num_saved_bits > get_bits_count(&s->gb)) {
1270  /* when the frames do not have a length prefix, we don't know the
1271  * compressed length of the individual frames however, we know what
1272  * part of a new packet belongs to the previous frame therefore we
1273  * save the incoming packet first, then we append the "previous
1274  * frame" data from the next packet so that we get a buffer that
1275  * only contains full frames */
1276  s->packet_done = !decode_frame(s);
1277  } else {
1278  s->packet_done = 1;
1279  }
1280  }
1281 
1282  if (remaining_bits(s, gb) < 0) {
1283  av_log(avctx, AV_LOG_ERROR, "Overread %d\n", -remaining_bits(s, gb));
1284  s->packet_loss = 1;
1285  }
1286 
1287  if (s->packet_done && !s->packet_loss &&
1288  remaining_bits(s, gb) > 0) {
1289  /* save the rest of the data so that it can be decoded
1290  * with the next packet */
1291  save_bits(s, gb, remaining_bits(s, gb), 0);
1292  }
1293 
1294  *got_frame_ptr = s->frame->nb_samples > 0;
1295  av_frame_move_ref(data, s->frame);
1296 
1297  s->packet_offset = get_bits_count(gb) & 7;
1298 
1299  return (s->packet_loss) ? AVERROR_INVALIDDATA : buf_size ? get_bits_count(gb) >> 3 : 0;
1300 }
1301 
1302 static void flush(AVCodecContext *avctx)
1303 {
1304  WmallDecodeCtx *s = avctx->priv_data;
1305  s->packet_loss = 1;
1306  s->packet_done = 0;
1307  s->num_saved_bits = 0;
1308  s->frame_offset = 0;
1309  s->next_packet_start = 0;
1310  s->cdlms[0][0].order = 0;
1311  s->frame->nb_samples = 0;
1313 }
1314 
1316 {
1317  WmallDecodeCtx *s = avctx->priv_data;
1318 
1319  av_frame_free(&s->frame);
1320  av_freep(&s->frame_data);
1321 
1322  return 0;
1323 }
1324 
1326  .name = "wmalossless",
1327  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio Lossless"),
1328  .type = AVMEDIA_TYPE_AUDIO,
1330  .priv_data_size = sizeof(WmallDecodeCtx),
1331  .init = decode_init,
1332  .close = decode_close,
1333  .decode = decode_packet,
1334  .flush = flush,
1336  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
1339 };
static void decode_ac_filter(WmallDecodeCtx *s)
int16_t prev_block_len
length of the previous block
uint8_t subframe_len_bits
number of bits used for the subframe length
uint8_t bits_per_sample
integer audio sample size for the unscaled IMDCT output (used to scale to [-1.0, 1.0])
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int decode_packet(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
uint8_t max_subframe_len_bit
flag indicating that the subframe is of maximum size when the first subframe length bit is 1 ...
unsigned ave_sum[WMALL_MAX_CHANNELS]
uint8_t max_num_subframes
uint16_t subframe_offsets[MAX_SUBFRAMES]
subframe positions in the current frame
int32_t * samples_32[WMALL_MAX_CHANNELS]
current sample buffer pointer (24-bit)
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:208
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
Definition: get_bits.h:291
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint8_t drc_gain
gain for the DRC tool
#define avpriv_request_sample(...)
int acfilter_prevvalues[WMALL_MAX_CHANNELS][16]
int size
Definition: avcodec.h:1478
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(const uint8_t *) pi - 0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(const int16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(const int16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(const int32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(const int32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(const int64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64, *(const int64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64, *(const int64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(const float *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(const double *) pi *(INT64_C(1)<< 63))) #define FMT_PAIR_FUNC(out, in) static conv_func_type *const fmt_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), };static void cpy1(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, len);} static void cpy2(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, 2 *len);} static void cpy4(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, 4 *len);} static void cpy8(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, 8 *len);} AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, const int *ch_map, int flags) { 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) return NULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) return NULL;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)){ case 1:ctx->simd_f=cpy1;break;case 2:ctx->simd_f=cpy2;break;case 4:ctx->simd_f=cpy4;break;case 8:ctx->simd_f=cpy8;break;} } if(HAVE_X86ASM &&HAVE_MMX) 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);return ctx;} void swri_audio_convert_free(AudioConvert **ctx) { av_freep(ctx);} int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len) { int ch;int off=0;const int os=(out->planar ? 1 :out->ch_count) *out->bps;unsigned misaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask) { int planes=in->planar ? in->ch_count :1;unsigned m=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) { int planes=out->planar ? out->ch_count :1;unsigned m=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){ int planes=out->planar ? out->ch_count :1;for(ch=0;ch< planes;ch++){ ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
void avpriv_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
Copy the content of src to the bitstream.
Definition: bitstream.c:64
const uint8_t * buffer
Definition: get_bits.h:62
PutBitContext pb
context for filling the frame_data buffer
#define AV_RL16
Definition: intreadwrite.h:42
uint8_t cur_subframe
current subframe number
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:582
LLAudDSPContext dsp
accelerated DSP functions
static void decode_mclms(WmallDecodeCtx *s)
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2796
int cdlms_ttl[WMALL_MAX_CHANNELS]
static int decode_subframe_length(WmallDecodeCtx *s, int offset)
Decode the subframe length.
AVCodec.
Definition: avcodec.h:3481
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2262
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:359
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
#define MAX_ORDER
int8_t channels_for_cur_subframe
number of channels that contain the subframe
Macro definitions for various function/variable attributes.
static int get_sbits_long(GetBitContext *s, int n)
Read 0-32 bits as a signed integer.
Definition: get_bits.h:590
uint8_t packet_sequence_number
current packet number
int max_frame_size
max bitstream size
int32_t mclms_updates[WMALL_MAX_CHANNELS *2 *32]
int16_t subframe_len
current subframe length
uint16_t decoded_samples
number of already processed samples
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:1006
GetBitContext pgb
bitstream reader context for the packet
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int quant_step
quantization step for the current subframe
int16_t coefs[MAX_ORDER+WMALL_COEFF_PAD_SIZE/sizeof(int16_t)]
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2233
uint8_t
#define av_cold
Definition: attributes.h:82
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
int16_t acfilter_coeffs[16]
int8_t num_channels
number of channels in the stream (same as AVCodecContext.num_channels)
static void reset_codec(WmallDecodeCtx *s)
Reset filter parameters and transient area at new seekable tile.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1666
int update_speed[WMALL_MAX_CHANNELS]
int is_channel_coded[WMALL_MAX_CHANNELS]
int frame_offset
frame offset in the bit reservoir
const char data[16]
Definition: mxf.c:91
static uint8_t * append(uint8_t *buf, const uint8_t *src, int size)
#define WMASIGN(x)
Get sign of integer (1 for positive, -1 for negative and 0 for zero)
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:112
uint16_t min_samples_per_subframe
uint8_t * data
Definition: avcodec.h:1477
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
#define ff_dlog(a,...)
bitstream reader API header.
#define CD_LMS(bits, ROUND)
AVFrame * frame
#define av_log(a,...)
frame-specific decoder context for a single channel
int8_t lfe_channel
lfe channel index
uint8_t do_arith_coding
#define U(x)
Definition: vp56_arith.h:37
int buf_bit_size
buffer size in bits
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
int16_t mclms_coeffs[WMALL_MAX_CHANNELS *WMALL_MAX_CHANNELS *32]
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static const uint16_t mask[17]
Definition: lzw.c:38
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
static av_cold int decode_init(AVCodecContext *avctx)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static void mclms_update(WmallDecodeCtx *s, int icoef, int *pred)
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
simple assert() macros that are a bit more flexible than ISO C assert().
int8_t channel_indexes_for_cur_subframe[WMALL_MAX_CHANNELS]
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
const char * name
Name of the codec implementation.
Definition: avcodec.h:3488
static int decode_subframe(WmallDecodeCtx *s)
uint8_t bits
Definition: vp3data.h:202
static int decode_cdlms(WmallDecodeCtx *s)
uint8_t transmit_coefs
static void revert_acfilter(WmallDecodeCtx *s, int tile_size)
#define WMALL_BLOCK_MAX_SIZE
maximum block size
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
AVCodecContext * avctx
#define FFMAX(a, b)
Definition: common.h:94
int channel_residues[WMALL_MAX_CHANNELS][WMALL_BLOCK_MAX_SIZE]
int8_t parsed_all_subframes
all subframes decoded?
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2276
static int decode_tilehdr(WmallDecodeCtx *s)
Decode how the data in the frame is split into subframes.
int32_t lms_prevvalues[MAX_ORDER *2+WMALL_COEFF_PAD_SIZE/sizeof(int16_t)]
static void use_high_update_speed(WmallDecodeCtx *s, int ich)
#define MAX_SUBFRAMES
max number of subframes per channel
static av_cold int decode_close(AVCodecContext *avctx)
uint8_t packet_loss
set in case of bitstream error
static void mclms_predict(WmallDecodeCtx *s, int icoef, int *pred)
static void clear_codec_buffers(WmallDecodeCtx *s)
#define FFMIN(a, b)
Definition: common.h:96
uint16_t log2_frame_size
signed 32 bits, planar
Definition: samplefmt.h:68
uint32_t decode_flags
used compression features
uint8_t * frame_data
compressed frame data
int32_t
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:446
static void revert_inter_ch_decorr(WmallDecodeCtx *s, int tile_size)
int8_t skip_frame
skip output step
#define s(width, name)
Definition: cbs_vp9.c:257
uint8_t packet_offset
offset to the frame in the packet
#define AV_RL32
Definition: intreadwrite.h:146
struct WmallDecodeCtx::@201 cdlms[WMALL_MAX_CHANNELS][9]
av_cold void ff_llauddsp_init(LLAudDSPContext *c)
static int decode_channel_residues(WmallDecodeCtx *s, int ch, int tile_size)
uint8_t packet_done
set when a packet is fully decoded
if(ret< 0)
Definition: vf_mcdeint.c:279
main decoder context
uint8_t do_ac_filter
static void use_normal_update_speed(WmallDecodeCtx *s, int ich)
int16_t mclms_coeffs_cur[WMALL_MAX_CHANNELS *WMALL_MAX_CHANNELS]
#define av_log2
Definition: intmath.h:83
uint16_t samples_per_frame
number of samples to output
static const float pred[4]
Definition: siprdata.h:259
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
const AVS_VideoInfo int align
Definition: avisynth_c.h:887
int next_packet_start
start offset of the next WMA packet in the demuxer packet
int frame_size
Definition: mxfenc.c:2215
Libavcodec external API header.
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
int sample_rate
samples per second
Definition: avcodec.h:2225
#define WMALL_MAX_CHANNELS
current decoder limitations
main external API structure.
Definition: avcodec.h:1565
int16_t * samples_16[WMALL_MAX_CHANNELS]
current sample buffer pointer (16-bit)
static void decode_lpc(WmallDecodeCtx *s)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1964
void * buf
Definition: avisynth_c.h:766
int extradata_size
Definition: avcodec.h:1667
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
#define AV_CODEC_CAP_SUBFRAMES
Codec can output multiple frames per AVPacket Normally demuxers return one frame at a time...
Definition: avcodec.h:1024
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
uint8_t num_subframes
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
static int remaining_bits(WmallDecodeCtx *s, GetBitContext *gb)
Calculate remaining input buffer length.
GetBitContext gb
bitstream reader context
uint32_t frame_num
current frame number (not used for decoding)
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:553
av_cold int ff_wma_get_frame_len_bits(int sample_rate, int version, unsigned int decode_flags)
Get the samples per frame for this stream.
Definition: wma_common.c:32
uint8_t do_inter_ch_decorr
uint16_t subframe_len[MAX_SUBFRAMES]
subframe length in samples
WmallChannelCtx channel[WMALL_MAX_CHANNELS]
per channel data
#define MAX_FRAMESIZE
maximum compressed frame size
common internal api header.
#define WMALL_COEFF_PAD_SIZE
pad coef buffers with 0 for use with SIMD
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
int dynamic_range_compression
frame contains DRC data
int transient_counter
number of transient samples from the beginning of the transient zone
static double c[64]
channel
Use these values when setting the channel map with ebur128_set_channel().
Definition: ebur128.h:39
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
static void save_bits(WmallDecodeCtx *s, GetBitContext *gb, int len, int append)
Fill the bit reservoir with a (partial) frame.
int transient_pos[WMALL_MAX_CHANNELS]
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:790
void * priv_data
Definition: avcodec.h:1592
int len
int channels
number of audio channels
Definition: avcodec.h:2226
int16_t lms_updates[MAX_ORDER *2+WMALL_COEFF_PAD_SIZE/sizeof(int16_t)]
AVCodec ff_wmalossless_decoder
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
static void flush(AVCodecContext *avctx)
int8_t acfilter_scaling
int len_prefix
frame is prefixed with its length
static int decode_frame(WmallDecodeCtx *s)
Decode one WMA frame.
#define av_freep(p)
signed 16 bits, planar
Definition: samplefmt.h:67
int transient[WMALL_MAX_CHANNELS]
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:342
int32_t mclms_prevvalues[WMALL_MAX_CHANNELS *2 *32]
int num_saved_bits
saved number of bits
int subframe_offset
subframe offset in the bit reservoir
This structure stores compressed data.
Definition: avcodec.h:1454
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:361
int lpc_coefs[WMALL_MAX_CHANNELS][40]
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:981
for(j=16;j >0;--j)
static av_always_inline int get_bitsz(GetBitContext *s, int n)
Read 0-25 bits.
Definition: get_bits.h:415
#define av_unused
Definition: attributes.h:125
static void revert_mclms(WmallDecodeCtx *s, int tile_size)
static uint8_t tmp[11]
Definition: aes_ctr.c:26
bitstream writer API