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mpc8.c
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1 /*
2  * Musepack SV8 decoder
3  * Copyright (c) 2007 Konstantin Shishkov
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
25  * divided into 32 subbands.
26  */
27 
29 #include "libavutil/lfg.h"
30 #include "avcodec.h"
31 #include "get_bits.h"
32 #include "internal.h"
33 #include "mpegaudiodsp.h"
34 
35 #include "mpc.h"
36 #include "mpc8data.h"
37 #include "mpc8huff.h"
38 
39 static VLC band_vlc, scfi_vlc[2], dscf_vlc[2], res_vlc[2];
40 static VLC q1_vlc, q2_vlc[2], q3_vlc[2], quant_vlc[4][2], q9up_vlc;
41 
42 static const int q3_offsets[2] = { MPC8_Q3_OFFSET, MPC8_Q4_OFFSET };
44 
45 static inline int mpc8_dec_base(GetBitContext *gb, int k, int n)
46 {
47  int len = mpc8_cnk_len[k-1][n-1] - 1;
48  int code = len ? get_bits_long(gb, len) : 0;
49 
50  if (code >= mpc8_cnk_lost[k-1][n-1])
51  code = ((code << 1) | get_bits1(gb)) - mpc8_cnk_lost[k-1][n-1];
52 
53  return code;
54 }
55 
56 static inline int mpc8_dec_enum(GetBitContext *gb, int k, int n)
57 {
58  int bits = 0;
59  const uint32_t * C = mpc8_cnk[k-1];
60  int code = mpc8_dec_base(gb, k, n);
61 
62  do {
63  n--;
64  if (code >= C[n]) {
65  bits |= 1 << n;
66  code -= C[n];
67  C -= 32;
68  k--;
69  }
70  } while(k > 0);
71 
72  return bits;
73 }
74 
75 static inline int mpc8_get_mod_golomb(GetBitContext *gb, int m)
76 {
77  if(mpc8_cnk_len[0][m] < 1) return 0;
78  return mpc8_dec_base(gb, 1, m+1);
79 }
80 
81 static int mpc8_get_mask(GetBitContext *gb, int size, int t)
82 {
83  int mask = 0;
84 
85  if(t && t != size)
86  mask = mpc8_dec_enum(gb, FFMIN(t, size - t), size);
87  if((t << 1) > size) mask = ~mask;
88 
89  return mask;
90 }
91 
92 static const uint16_t vlc_offsets[13] = {
93  0, 640, 1184, 1748, 2298, 2426, 2554, 3066, 3578, 4106, 4618, 5196, 5708
94 };
95 
97 {
98  int i;
99  MPCContext *c = avctx->priv_data;
100  GetBitContext gb;
101  static int vlc_initialized = 0;
102  int channels;
103 
104  static VLC_TYPE band_table[542][2];
105  static VLC_TYPE q1_table[520][2];
106  static VLC_TYPE q9up_table[524][2];
107  static VLC_TYPE scfi0_table[1 << MPC8_SCFI0_BITS][2];
108  static VLC_TYPE scfi1_table[1 << MPC8_SCFI1_BITS][2];
109  static VLC_TYPE dscf0_table[560][2];
110  static VLC_TYPE dscf1_table[598][2];
111  static VLC_TYPE q3_0_table[512][2];
112  static VLC_TYPE q3_1_table[516][2];
113  static VLC_TYPE codes_table[5708][2];
114 
115  if(avctx->extradata_size < 2){
116  av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
117  return -1;
118  }
119  memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
120  av_lfg_init(&c->rnd, 0xDEADBEEF);
121  ff_mpadsp_init(&c->mpadsp);
122 
123  ff_mpc_init();
124 
125  init_get_bits(&gb, avctx->extradata, 16);
126 
127  skip_bits(&gb, 3);//sample rate
128  c->maxbands = get_bits(&gb, 5) + 1;
129  if (c->maxbands >= BANDS) {
130  av_log(avctx,AV_LOG_ERROR, "maxbands %d too high\n", c->maxbands);
131  return AVERROR_INVALIDDATA;
132  }
133  channels = get_bits(&gb, 4) + 1;
134  if (channels > 2) {
135  avpriv_request_sample(avctx, "Multichannel MPC SV8");
136  return AVERROR_PATCHWELCOME;
137  }
138  c->MSS = get_bits1(&gb);
139  c->frames = 1 << (get_bits(&gb, 3) * 2);
140 
142  avctx->channel_layout = (channels==2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
143  avctx->channels = channels;
144 
145  if(vlc_initialized) return 0;
146  av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
147 
148  band_vlc.table = band_table;
149  band_vlc.table_allocated = 542;
151  mpc8_bands_bits, 1, 1,
153 
154  q1_vlc.table = q1_table;
155  q1_vlc.table_allocated = 520;
157  mpc8_q1_bits, 1, 1,
159  q9up_vlc.table = q9up_table;
160  q9up_vlc.table_allocated = 524;
162  mpc8_q9up_bits, 1, 1,
164 
165  scfi_vlc[0].table = scfi0_table;
166  scfi_vlc[0].table_allocated = 1 << MPC8_SCFI0_BITS;
168  mpc8_scfi0_bits, 1, 1,
170  scfi_vlc[1].table = scfi1_table;
171  scfi_vlc[1].table_allocated = 1 << MPC8_SCFI1_BITS;
173  mpc8_scfi1_bits, 1, 1,
175 
176  dscf_vlc[0].table = dscf0_table;
177  dscf_vlc[0].table_allocated = 560;
179  mpc8_dscf0_bits, 1, 1,
181  dscf_vlc[1].table = dscf1_table;
182  dscf_vlc[1].table_allocated = 598;
184  mpc8_dscf1_bits, 1, 1,
186 
187  q3_vlc[0].table = q3_0_table;
188  q3_vlc[0].table_allocated = 512;
190  mpc8_q3_bits, 1, 1,
191  mpc8_q3_codes, 1, 1,
193  q3_vlc[1].table = q3_1_table;
194  q3_vlc[1].table_allocated = 516;
196  mpc8_q4_bits, 1, 1,
197  mpc8_q4_codes, 1, 1,
199 
200  for(i = 0; i < 2; i++){
201  res_vlc[i].table = &codes_table[vlc_offsets[0+i]];
202  res_vlc[i].table_allocated = vlc_offsets[1+i] - vlc_offsets[0+i];
203  init_vlc(&res_vlc[i], MPC8_RES_BITS, MPC8_RES_SIZE,
204  &mpc8_res_bits[i], 1, 1,
206 
207  q2_vlc[i].table = &codes_table[vlc_offsets[2+i]];
208  q2_vlc[i].table_allocated = vlc_offsets[3+i] - vlc_offsets[2+i];
209  init_vlc(&q2_vlc[i], MPC8_Q2_BITS, MPC8_Q2_SIZE,
210  &mpc8_q2_bits[i], 1, 1,
212 
213  quant_vlc[0][i].table = &codes_table[vlc_offsets[4+i]];
214  quant_vlc[0][i].table_allocated = vlc_offsets[5+i] - vlc_offsets[4+i];
215  init_vlc(&quant_vlc[0][i], MPC8_Q5_BITS, MPC8_Q5_SIZE,
216  &mpc8_q5_bits[i], 1, 1,
218  quant_vlc[1][i].table = &codes_table[vlc_offsets[6+i]];
219  quant_vlc[1][i].table_allocated = vlc_offsets[7+i] - vlc_offsets[6+i];
220  init_vlc(&quant_vlc[1][i], MPC8_Q6_BITS, MPC8_Q6_SIZE,
221  &mpc8_q6_bits[i], 1, 1,
223  quant_vlc[2][i].table = &codes_table[vlc_offsets[8+i]];
224  quant_vlc[2][i].table_allocated = vlc_offsets[9+i] - vlc_offsets[8+i];
225  init_vlc(&quant_vlc[2][i], MPC8_Q7_BITS, MPC8_Q7_SIZE,
226  &mpc8_q7_bits[i], 1, 1,
228  quant_vlc[3][i].table = &codes_table[vlc_offsets[10+i]];
229  quant_vlc[3][i].table_allocated = vlc_offsets[11+i] - vlc_offsets[10+i];
230  init_vlc(&quant_vlc[3][i], MPC8_Q8_BITS, MPC8_Q8_SIZE,
231  &mpc8_q8_bits[i], 1, 1,
233  }
234  vlc_initialized = 1;
235 
236  return 0;
237 }
238 
239 static int mpc8_decode_frame(AVCodecContext * avctx, void *data,
240  int *got_frame_ptr, AVPacket *avpkt)
241 {
242  AVFrame *frame = data;
243  const uint8_t *buf = avpkt->data;
244  int buf_size = avpkt->size;
245  MPCContext *c = avctx->priv_data;
246  GetBitContext gb2, *gb = &gb2;
247  int i, j, k, ch, cnt, res, t;
248  Band *bands = c->bands;
249  int off;
250  int maxband, keyframe;
251  int last[2];
252 
253  /* get output buffer */
254  frame->nb_samples = MPC_FRAME_SIZE;
255  if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
256  return res;
257 
258  keyframe = c->cur_frame == 0;
259 
260  if(keyframe){
261  memset(c->Q, 0, sizeof(c->Q));
262  c->last_bits_used = 0;
263  }
264  init_get_bits(gb, buf, buf_size * 8);
265  skip_bits(gb, c->last_bits_used & 7);
266 
267  if(keyframe)
268  maxband = mpc8_get_mod_golomb(gb, c->maxbands + 1);
269  else{
270  maxband = c->last_max_band + get_vlc2(gb, band_vlc.table, MPC8_BANDS_BITS, 2);
271  if(maxband > 32) maxband -= 33;
272  }
273 
274  if(maxband > c->maxbands + 1) {
275  av_log(avctx, AV_LOG_ERROR, "maxband %d too large\n",maxband);
276  return AVERROR_INVALIDDATA;
277  }
278  c->last_max_band = maxband;
279 
280  /* read subband indexes */
281  if(maxband){
282  last[0] = last[1] = 0;
283  for(i = maxband - 1; i >= 0; i--){
284  for(ch = 0; ch < 2; ch++){
285  last[ch] = get_vlc2(gb, res_vlc[last[ch] > 2].table, MPC8_RES_BITS, 2) + last[ch];
286  if(last[ch] > 15) last[ch] -= 17;
287  bands[i].res[ch] = last[ch];
288  }
289  }
290  if(c->MSS){
291  int mask;
292 
293  cnt = 0;
294  for(i = 0; i < maxband; i++)
295  if(bands[i].res[0] || bands[i].res[1])
296  cnt++;
297  t = mpc8_get_mod_golomb(gb, cnt);
298  mask = mpc8_get_mask(gb, cnt, t);
299  for(i = maxband - 1; i >= 0; i--)
300  if(bands[i].res[0] || bands[i].res[1]){
301  bands[i].msf = mask & 1;
302  mask >>= 1;
303  }
304  }
305  }
306  for(i = maxband; i < c->maxbands; i++)
307  bands[i].res[0] = bands[i].res[1] = 0;
308 
309  if(keyframe){
310  for(i = 0; i < 32; i++)
311  c->oldDSCF[0][i] = c->oldDSCF[1][i] = 1;
312  }
313 
314  for(i = 0; i < maxband; i++){
315  if(bands[i].res[0] || bands[i].res[1]){
316  cnt = !!bands[i].res[0] + !!bands[i].res[1] - 1;
317  if(cnt >= 0){
318  t = get_vlc2(gb, scfi_vlc[cnt].table, scfi_vlc[cnt].bits, 1);
319  if(bands[i].res[0]) bands[i].scfi[0] = t >> (2 * cnt);
320  if(bands[i].res[1]) bands[i].scfi[1] = t & 3;
321  }
322  }
323  }
324 
325  for(i = 0; i < maxband; i++){
326  for(ch = 0; ch < 2; ch++){
327  if(!bands[i].res[ch]) continue;
328 
329  if(c->oldDSCF[ch][i]){
330  bands[i].scf_idx[ch][0] = get_bits(gb, 7) - 6;
331  c->oldDSCF[ch][i] = 0;
332  }else{
333  t = get_vlc2(gb, dscf_vlc[1].table, MPC8_DSCF1_BITS, 2);
334  if(t == 64)
335  t += get_bits(gb, 6);
336  bands[i].scf_idx[ch][0] = ((bands[i].scf_idx[ch][2] + t - 25) & 0x7F) - 6;
337  }
338  for(j = 0; j < 2; j++){
339  if((bands[i].scfi[ch] << j) & 2)
340  bands[i].scf_idx[ch][j + 1] = bands[i].scf_idx[ch][j];
341  else{
342  t = get_vlc2(gb, dscf_vlc[0].table, MPC8_DSCF0_BITS, 2);
343  if(t == 31)
344  t = 64 + get_bits(gb, 6);
345  bands[i].scf_idx[ch][j + 1] = ((bands[i].scf_idx[ch][j] + t - 25) & 0x7F) - 6;
346  }
347  }
348  }
349  }
350 
351  for(i = 0, off = 0; i < maxband; i++, off += SAMPLES_PER_BAND){
352  for(ch = 0; ch < 2; ch++){
353  res = bands[i].res[ch];
354  switch(res){
355  case -1:
356  for(j = 0; j < SAMPLES_PER_BAND; j++)
357  c->Q[ch][off + j] = (av_lfg_get(&c->rnd) & 0x3FC) - 510;
358  break;
359  case 0:
360  break;
361  case 1:
362  for(j = 0; j < SAMPLES_PER_BAND; j += SAMPLES_PER_BAND / 2){
363  cnt = get_vlc2(gb, q1_vlc.table, MPC8_Q1_BITS, 2);
364  t = mpc8_get_mask(gb, 18, cnt);
365  for(k = 0; k < SAMPLES_PER_BAND / 2; k++, t <<= 1)
366  c->Q[ch][off + j + k] = (t & 0x20000) ? (get_bits1(gb) << 1) - 1 : 0;
367  }
368  break;
369  case 2:
370  cnt = 6;//2*mpc8_thres[res]
371  for(j = 0; j < SAMPLES_PER_BAND; j += 3){
372  t = get_vlc2(gb, q2_vlc[cnt > 3].table, MPC8_Q2_BITS, 2);
373  c->Q[ch][off + j + 0] = mpc8_idx50[t];
374  c->Q[ch][off + j + 1] = mpc8_idx51[t];
375  c->Q[ch][off + j + 2] = mpc8_idx52[t];
376  cnt = (cnt >> 1) + mpc8_huffq2[t];
377  }
378  break;
379  case 3:
380  case 4:
381  for(j = 0; j < SAMPLES_PER_BAND; j += 2){
382  t = get_vlc2(gb, q3_vlc[res - 3].table, MPC8_Q3_BITS, 2) + q3_offsets[res - 3];
383  c->Q[ch][off + j + 1] = t >> 4;
384  c->Q[ch][off + j + 0] = (t & 8) ? (t & 0xF) - 16 : (t & 0xF);
385  }
386  break;
387  case 5:
388  case 6:
389  case 7:
390  case 8:
391  cnt = 2 * mpc8_thres[res];
392  for(j = 0; j < SAMPLES_PER_BAND; j++){
393  t = get_vlc2(gb, quant_vlc[res - 5][cnt > mpc8_thres[res]].table, quant_vlc[res - 5][cnt > mpc8_thres[res]].bits, 2) + quant_offsets[res - 5];
394  c->Q[ch][off + j] = t;
395  cnt = (cnt >> 1) + FFABS(c->Q[ch][off + j]);
396  }
397  break;
398  default:
399  for(j = 0; j < SAMPLES_PER_BAND; j++){
400  c->Q[ch][off + j] = get_vlc2(gb, q9up_vlc.table, MPC8_Q9UP_BITS, 2);
401  if(res != 9){
402  c->Q[ch][off + j] <<= res - 9;
403  c->Q[ch][off + j] |= get_bits(gb, res - 9);
404  }
405  c->Q[ch][off + j] -= (1 << (res - 2)) - 1;
406  }
407  }
408  }
409  }
410 
411  ff_mpc_dequantize_and_synth(c, maxband - 1,
412  (int16_t **)frame->extended_data,
413  avctx->channels);
414 
415  c->cur_frame++;
416 
418  if(c->cur_frame >= c->frames)
419  c->cur_frame = 0;
420  if(c->cur_frame == 0 && get_bits_left(gb) < 8) {// we have only padding left
421  c->last_bits_used = buf_size << 3;
422  } else if (get_bits_left(gb) < 0) {
423  av_log(avctx, AV_LOG_ERROR, "Overread %d\n", -get_bits_left(gb));
424  c->last_bits_used = buf_size << 3;
425  }
426 
427  *got_frame_ptr = 1;
428 
429  return c->cur_frame ? c->last_bits_used >> 3 : buf_size;
430 }
431 
433 {
434  MPCContext *c = avctx->priv_data;
435  c->cur_frame = 0;
436 }
437 
439  .name = "mpc8",
440  .long_name = NULL_IF_CONFIG_SMALL("Musepack SV8"),
441  .type = AVMEDIA_TYPE_AUDIO,
442  .id = AV_CODEC_ID_MUSEPACK8,
443  .priv_data_size = sizeof(MPCContext),
447  .capabilities = AV_CODEC_CAP_DR1,
448  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
450 };
static const int quant_offsets[6]
Definition: mpc8.c:43
void ff_mpc_dequantize_and_synth(MPCContext *c, int maxband, int16_t **out, int channels)
Definition: mpc.c:61
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
static const int8_t mpc8_q5_bits[2][MPC8_Q5_SIZE]
Definition: mpc8huff.h:404
static VLC q2_vlc[2]
Definition: mpc8.c:40
#define MPC8_Q8_BITS
Definition: mpc8huff.h:498
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static void flush(AVCodecContext *avctx)
#define C
MPADSPContext mpadsp
Definition: mpc.h:54
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:247
static const int8_t mpc8_bands_bits[MPC8_BANDS_SIZE]
Definition: mpc8huff.h:37
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define MPC8_SCFI0_SIZE
Definition: mpc8huff.h:45
int msf
mid-stereo flag
Definition: mpc.h:45
int ff_init_vlc_sparse(VLC *vlc_arg, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags)
Definition: bitstream.c:275
int Q[2][MPC_FRAME_SIZE]
Definition: mpc.h:61
int size
Definition: avcodec.h:1602
int res[2]
Definition: mpc.h:46
AVLFG rnd
Definition: mpc.h:65
#define MPC8_DSCF0_SIZE
Definition: mpc8huff.h:69
int last_max_band
Definition: mpc.h:57
#define AV_CH_LAYOUT_STEREO
#define MPC8_Q8_SIZE
Definition: mpc8huff.h:497
AVCodec.
Definition: avcodec.h:3601
#define MPC8_RES_SIZE
Definition: mpc8huff.h:120
static const uint8_t mpc8_q8_codes[2][MPC8_Q8_SIZE]
Definition: mpc8huff.h:501
static const int8_t mpc8_q7_bits[2][MPC8_Q7_SIZE]
Definition: mpc8huff.h:474
#define MPC8_Q3_BITS
Definition: mpc8huff.h:315
static const int8_t mpc8_q8_bits[2][MPC8_Q8_SIZE]
Definition: mpc8huff.h:539
#define MPC8_DSCF1_SIZE
Definition: mpc8huff.h:94
static const uint32_t mpc8_cnk_lost[16][33]
Definition: mpc8data.h:101
#define MPC8_Q6_BITS
Definition: mpc8huff.h:416
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static const int8_t mpc8_dscf1_bits[MPC8_DSCF1_SIZE]
Definition: mpc8huff.h:108
uint8_t bits
Definition: crc.c:296
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2446
static const int8_t mpc8_q4_syms[MPC8_Q4_SIZE]
Definition: mpc8huff.h:376
uint8_t
#define av_cold
Definition: attributes.h:82
#define MPC8_Q7_SIZE
Definition: mpc8huff.h:448
#define MPC8_Q1_BITS
Definition: mpc8huff.h:149
static VLC q3_vlc[2]
Definition: mpc8.c:40
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1791
static const uint8_t mpc8_dscf1_codes[MPC8_DSCF1_SIZE]
Definition: mpc8huff.h:97
#define MPC8_BANDS_SIZE
Definition: mpc8huff.h:27
static AVFrame * frame
int scf_idx[2][3]
Definition: mpc.h:48
#define MPC8_DSCF1_BITS
Definition: mpc8huff.h:95
uint8_t * data
Definition: avcodec.h:1601
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
static const uint8_t mpc8_q1_codes[MPC8_Q1_SIZE]
Definition: mpc8huff.h:151
bitstream reader API header.
#define MPC8_SCFI0_BITS
Definition: mpc8huff.h:46
static const int8_t mpc8_dscf0_bits[MPC8_DSCF0_SIZE]
Definition: mpc8huff.h:82
ptrdiff_t size
Definition: opengl_enc.c:101
int last_bits_used
Definition: mpc.h:58
#define av_log(a,...)
static const int8_t mpc8_scfi1_bits[MPC8_SCFI1_SIZE]
Definition: mpc8huff.h:63
static const int8_t mpc8_huffq2[5 *5 *5]
Definition: mpc8data.h:50
#define MPC8_Q9UP_SIZE
Definition: mpc8huff.h:162
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:572
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define MPC8_Q1_SIZE
Definition: mpc8huff.h:148
static const int8_t mpc8_q1_bits[MPC8_Q1_SIZE]
Definition: mpc8huff.h:156
static const uint8_t mpc8_dscf0_codes[MPC8_DSCF0_SIZE]
Definition: mpc8huff.h:72
static const int8_t mpc8_idx50[125]
Definition: mpc8data.h:27
#define MPC8_Q5_SIZE
Definition: mpc8huff.h:390
static const uint16_t mask[17]
Definition: lzw.c:38
int cur_frame
Definition: mpc.h:62
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: vlc.h:38
static VLC dscf_vlc[2]
Definition: mpc8.c:39
static av_cold int mpc8_decode_init(AVCodecContext *avctx)
Definition: mpc8.c:96
static const struct endianess table[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
static VLC quant_vlc[4][2]
Definition: mpc8.c:40
static const int8_t mpc8_scfi0_bits[MPC8_SCFI0_SIZE]
Definition: mpc8huff.h:51
static const int8_t mpc8_q3_bits[MPC8_Q3_SIZE]
Definition: mpc8huff.h:327
const char * name
Name of the codec implementation.
Definition: avcodec.h:3608
int maxbands
Definition: mpc.h:57
#define SAMPLES_PER_BAND
Definition: mpc.h:40
#define MPC8_Q4_BITS
Definition: mpc8huff.h:347
Definition: vlc.h:26
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2489
#define MPC8_Q4_OFFSET
Definition: mpc8huff.h:348
#define MPC8_SCFI1_SIZE
Definition: mpc8huff.h:55
static const uint8_t mpc8_bands_codes[MPC8_BANDS_SIZE]
Definition: mpc8huff.h:30
static av_cold void mpc8_decode_flush(AVCodecContext *avctx)
Definition: mpc8.c:432
static const int8_t mpc8_idx51[125]
Definition: mpc8data.h:34
audio channel layout utility functions
#define MPC_FRAME_SIZE
Definition: mpc.h:41
static int mpc8_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: mpc8.c:239
#define FFMIN(a, b)
Definition: common.h:96
static int mpc8_get_mod_golomb(GetBitContext *gb, int m)
Definition: mpc8.c:75
#define MPC8_Q8_OFFSET
Definition: mpc8huff.h:499
AVCodec ff_mpc8_decoder
Definition: mpc8.c:438
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:539
#define MPC8_Q7_OFFSET
Definition: mpc8huff.h:450
int n
Definition: avisynth_c.h:684
static const uint8_t mpc8_q5_codes[2][MPC8_Q5_SIZE]
Definition: mpc8huff.h:394
static const uint8_t mpc8_cnk_len[16][33]
Definition: mpc8data.h:80
#define MPC8_Q6_SIZE
Definition: mpc8huff.h:415
static VLC q9up_vlc
Definition: mpc8.c:40
static const uint8_t mpc8_q3_codes[MPC8_Q3_SIZE]
Definition: mpc8huff.h:318
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
int table_allocated
Definition: vlc.h:29
Libavcodec external API header.
Musepack decoder MPEG Audio Layer 1/2 -like codec with frames of 1152 samples divided into 32 subband...
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
#define MPC8_Q7_BITS
Definition: mpc8huff.h:449
av_cold void ff_mpc_init(void)
Definition: mpc.c:37
int scfi[2]
Definition: mpc.h:47
main external API structure.
Definition: avcodec.h:1676
#define MPC8_Q5_OFFSET
Definition: mpc8huff.h:392
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:947
static unsigned int av_lfg_get(AVLFG *c)
Get the next random unsigned 32-bit number using an ALFG.
Definition: lfg.h:38
void * buf
Definition: avisynth_c.h:690
int extradata_size
Definition: avcodec.h:1792
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:299
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:292
int oldDSCF[2][BANDS]
Definition: mpc.h:59
static VLC scfi_vlc[2]
Definition: mpc8.c:39
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:410
static const uint32_t mpc8_cnk[16][32]
Definition: mpc8data.h:60
static int mpc8_dec_base(GetBitContext *gb, int k, int n)
Definition: mpc8.c:45
#define MPC8_Q6_OFFSET
Definition: mpc8huff.h:417
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
Definition: lfg.c:30
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:332
static const uint16_t vlc_offsets[13]
Definition: mpc8.c:92
static const unsigned int mpc8_thres[]
Definition: mpc8data.h:49
#define BANDS
Definition: imc.c:52
static const int8_t mpc8_q3_syms[MPC8_Q3_SIZE]
Definition: mpc8huff.h:336
#define MPC8_Q2_SIZE
Definition: mpc8huff.h:234
#define MPC8_SCFI1_BITS
Definition: mpc8huff.h:56
#define MPC8_Q9UP_BITS
Definition: mpc8huff.h:163
static const uint8_t mpc8_scfi1_codes[MPC8_SCFI1_SIZE]
Definition: mpc8huff.h:58
Band bands[BANDS]
Definition: mpc.h:60
static const int q3_offsets[2]
Definition: mpc8.c:42
static const int8_t mpc8_q9up_bits[MPC8_Q9UP_SIZE]
Definition: mpc8huff.h:199
common internal api header.
static const int8_t mpc8_idx52[125]
Definition: mpc8data.h:41
static const uint8_t mpc8_q9up_codes[MPC8_Q9UP_SIZE]
Definition: mpc8huff.h:165
#define MPC8_DSCF0_BITS
Definition: mpc8huff.h:70
#define INIT_VLC_USE_NEW_STATIC
Definition: vlc.h:55
#define MPC8_RES_BITS
Definition: mpc8huff.h:121
static const uint8_t mpc8_q2_codes[2][MPC8_Q2_SIZE]
Definition: mpc8huff.h:237
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(constuint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(constint16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(constint32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(constint64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(constfloat *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(constdouble *) pi *(INT64_C(1)<< 63)))#defineFMT_PAIR_FUNC(out, in) staticconv_func_type *constfmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};staticvoidcpy1(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, len);}staticvoidcpy2(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 2 *len);}staticvoidcpy4(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 4 *len);}staticvoidcpy8(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, constint *ch_map, intflags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) returnNULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) returnNULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case1:ctx->simd_f=cpy1;break;case2:ctx->simd_f=cpy2;break;case4:ctx->simd_f=cpy4;break;case8:ctx->simd_f=cpy8;break;}}if(HAVE_YASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);returnctx;}voidswri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}intswri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, intlen){intch;intoff=0;constintos=(out->planar?1:out->ch_count)*out->bps;unsignedmisaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){intplanes=in->planar?in->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){intplanes=out->planar?out->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){intplanes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
static const int8_t mpc8_q2_bits[2][MPC8_Q2_SIZE]
Definition: mpc8huff.h:275
static VLC q1_vlc
Definition: mpc8.c:40
int MSS
Definition: mpc.h:55
void * priv_data
Definition: avcodec.h:1718
static const uint8_t mpc8_res_codes[2][MPC8_RES_SIZE]
Definition: mpc8huff.h:123
int len
int channels
number of audio channels
Definition: avcodec.h:2439
static VLC res_vlc[2]
Definition: mpc8.c:39
int frames
Definition: mpc.h:62
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
static AVCodec * c
#define MPC8_Q3_OFFSET
Definition: mpc8huff.h:316
static int mpc8_get_mask(GetBitContext *gb, int size, int t)
Definition: mpc8.c:81
static const int8_t mpc8_res_bits[2][MPC8_RES_SIZE]
Definition: mpc8huff.h:135
static const uint8_t mpc8_q6_codes[2][MPC8_Q6_SIZE]
Definition: mpc8huff.h:419
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
static const int8_t mpc8_q6_bits[2][MPC8_Q6_SIZE]
Definition: mpc8huff.h:433
static const uint8_t mpc8_q4_codes[MPC8_Q4_SIZE]
Definition: mpc8huff.h:350
static VLC band_vlc
Definition: mpc8.c:39
signed 16 bits, planar
Definition: samplefmt.h:67
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: ffmpeg.c:2045
#define MPC8_Q5_BITS
Definition: mpc8huff.h:391
#define VLC_TYPE
Definition: vlc.h:24
#define MPC8_Q4_SIZE
Definition: mpc8huff.h:346
#define MPC8_BANDS_BITS
Definition: mpc8huff.h:28
#define MPC8_Q3_SIZE
Definition: mpc8huff.h:314
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:231
#define AV_CH_LAYOUT_MONO
Subband structure - hold all variables for each subband.
Definition: mpc.h:44
This structure stores compressed data.
Definition: avcodec.h:1578
av_cold void ff_mpadsp_init(MPADSPContext *s)
Definition: mpegaudiodsp.c:27
static int mpc8_dec_enum(GetBitContext *gb, int k, int n)
Definition: mpc8.c:56
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:241
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:959
static const uint8_t mpc8_q7_codes[2][MPC8_Q7_SIZE]
Definition: mpc8huff.h:452
#define MPC8_Q2_BITS
Definition: mpc8huff.h:235
static const uint8_t mpc8_scfi0_codes[MPC8_SCFI0_SIZE]
Definition: mpc8huff.h:48
Definition: mpc.h:52
static const int8_t mpc8_q4_bits[MPC8_Q4_SIZE]
Definition: mpc8huff.h:363