Libav
mpc8.c
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1 /*
2  * Musepack SV8 decoder
3  * Copyright (c) 2007 Konstantin Shishkov
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
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  channels = get_bits(&gb, 4) + 1;
130  if (channels > 2) {
131  avpriv_request_sample(avctx, "Multichannel MPC SV8");
132  return AVERROR_PATCHWELCOME;
133  }
134  c->MSS = get_bits1(&gb);
135  c->frames = 1 << (get_bits(&gb, 3) * 2);
136 
139 
140  if(vlc_initialized) return 0;
141  av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
142 
143  band_vlc.table = band_table;
144  band_vlc.table_allocated = 542;
146  mpc8_bands_bits, 1, 1,
148 
149  q1_vlc.table = q1_table;
150  q1_vlc.table_allocated = 520;
152  mpc8_q1_bits, 1, 1,
154  q9up_vlc.table = q9up_table;
155  q9up_vlc.table_allocated = 524;
157  mpc8_q9up_bits, 1, 1,
159 
160  scfi_vlc[0].table = scfi0_table;
161  scfi_vlc[0].table_allocated = 1 << MPC8_SCFI0_BITS;
163  mpc8_scfi0_bits, 1, 1,
165  scfi_vlc[1].table = scfi1_table;
166  scfi_vlc[1].table_allocated = 1 << MPC8_SCFI1_BITS;
168  mpc8_scfi1_bits, 1, 1,
170 
171  dscf_vlc[0].table = dscf0_table;
172  dscf_vlc[0].table_allocated = 560;
174  mpc8_dscf0_bits, 1, 1,
176  dscf_vlc[1].table = dscf1_table;
177  dscf_vlc[1].table_allocated = 598;
179  mpc8_dscf1_bits, 1, 1,
181 
182  q3_vlc[0].table = q3_0_table;
183  q3_vlc[0].table_allocated = 512;
185  mpc8_q3_bits, 1, 1,
186  mpc8_q3_codes, 1, 1,
188  q3_vlc[1].table = q3_1_table;
189  q3_vlc[1].table_allocated = 516;
191  mpc8_q4_bits, 1, 1,
192  mpc8_q4_codes, 1, 1,
194 
195  for(i = 0; i < 2; i++){
196  res_vlc[i].table = &codes_table[vlc_offsets[0+i]];
197  res_vlc[i].table_allocated = vlc_offsets[1+i] - vlc_offsets[0+i];
198  init_vlc(&res_vlc[i], MPC8_RES_BITS, MPC8_RES_SIZE,
199  &mpc8_res_bits[i], 1, 1,
201 
202  q2_vlc[i].table = &codes_table[vlc_offsets[2+i]];
203  q2_vlc[i].table_allocated = vlc_offsets[3+i] - vlc_offsets[2+i];
204  init_vlc(&q2_vlc[i], MPC8_Q2_BITS, MPC8_Q2_SIZE,
205  &mpc8_q2_bits[i], 1, 1,
207 
208  quant_vlc[0][i].table = &codes_table[vlc_offsets[4+i]];
209  quant_vlc[0][i].table_allocated = vlc_offsets[5+i] - vlc_offsets[4+i];
210  init_vlc(&quant_vlc[0][i], MPC8_Q5_BITS, MPC8_Q5_SIZE,
211  &mpc8_q5_bits[i], 1, 1,
213  quant_vlc[1][i].table = &codes_table[vlc_offsets[6+i]];
214  quant_vlc[1][i].table_allocated = vlc_offsets[7+i] - vlc_offsets[6+i];
215  init_vlc(&quant_vlc[1][i], MPC8_Q6_BITS, MPC8_Q6_SIZE,
216  &mpc8_q6_bits[i], 1, 1,
218  quant_vlc[2][i].table = &codes_table[vlc_offsets[8+i]];
219  quant_vlc[2][i].table_allocated = vlc_offsets[9+i] - vlc_offsets[8+i];
220  init_vlc(&quant_vlc[2][i], MPC8_Q7_BITS, MPC8_Q7_SIZE,
221  &mpc8_q7_bits[i], 1, 1,
223  quant_vlc[3][i].table = &codes_table[vlc_offsets[10+i]];
224  quant_vlc[3][i].table_allocated = vlc_offsets[11+i] - vlc_offsets[10+i];
225  init_vlc(&quant_vlc[3][i], MPC8_Q8_BITS, MPC8_Q8_SIZE,
226  &mpc8_q8_bits[i], 1, 1,
228  }
229  vlc_initialized = 1;
230 
231  return 0;
232 }
233 
234 static int mpc8_decode_frame(AVCodecContext * avctx, void *data,
235  int *got_frame_ptr, AVPacket *avpkt)
236 {
237  AVFrame *frame = data;
238  const uint8_t *buf = avpkt->data;
239  int buf_size = avpkt->size;
240  MPCContext *c = avctx->priv_data;
241  GetBitContext gb2, *gb = &gb2;
242  int i, j, k, ch, cnt, res, t;
243  Band *bands = c->bands;
244  int off;
245  int maxband, keyframe;
246  int last[2];
247 
248  /* get output buffer */
249  frame->nb_samples = MPC_FRAME_SIZE;
250  if ((res = ff_get_buffer(avctx, frame, 0)) < 0) {
251  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
252  return res;
253  }
254 
255  keyframe = c->cur_frame == 0;
256 
257  if(keyframe){
258  memset(c->Q, 0, sizeof(c->Q));
259  c->last_bits_used = 0;
260  }
261  init_get_bits(gb, buf, buf_size * 8);
262  skip_bits(gb, c->last_bits_used & 7);
263 
264  if(keyframe)
265  maxband = mpc8_get_mod_golomb(gb, c->maxbands + 1);
266  else{
267  maxband = c->last_max_band + get_vlc2(gb, band_vlc.table, MPC8_BANDS_BITS, 2);
268  if(maxband > 32) maxband -= 33;
269  }
270  if(maxband > c->maxbands + 1)
271  return AVERROR_INVALIDDATA;
272  c->last_max_band = maxband;
273 
274  /* read subband indexes */
275  if(maxband){
276  last[0] = last[1] = 0;
277  for(i = maxband - 1; i >= 0; i--){
278  for(ch = 0; ch < 2; ch++){
279  last[ch] = get_vlc2(gb, res_vlc[last[ch] > 2].table, MPC8_RES_BITS, 2) + last[ch];
280  if(last[ch] > 15) last[ch] -= 17;
281  bands[i].res[ch] = last[ch];
282  }
283  }
284  if(c->MSS){
285  int mask;
286 
287  cnt = 0;
288  for(i = 0; i < maxband; i++)
289  if(bands[i].res[0] || bands[i].res[1])
290  cnt++;
291  t = mpc8_get_mod_golomb(gb, cnt);
292  mask = mpc8_get_mask(gb, cnt, t);
293  for(i = maxband - 1; i >= 0; i--)
294  if(bands[i].res[0] || bands[i].res[1]){
295  bands[i].msf = mask & 1;
296  mask >>= 1;
297  }
298  }
299  }
300  for(i = maxband; i < c->maxbands; i++)
301  bands[i].res[0] = bands[i].res[1] = 0;
302 
303  if(keyframe){
304  for(i = 0; i < 32; i++)
305  c->oldDSCF[0][i] = c->oldDSCF[1][i] = 1;
306  }
307 
308  for(i = 0; i < maxband; i++){
309  if(bands[i].res[0] || bands[i].res[1]){
310  cnt = !!bands[i].res[0] + !!bands[i].res[1] - 1;
311  if(cnt >= 0){
312  t = get_vlc2(gb, scfi_vlc[cnt].table, scfi_vlc[cnt].bits, 1);
313  if(bands[i].res[0]) bands[i].scfi[0] = t >> (2 * cnt);
314  if(bands[i].res[1]) bands[i].scfi[1] = t & 3;
315  }
316  }
317  }
318 
319  for(i = 0; i < maxband; i++){
320  for(ch = 0; ch < 2; ch++){
321  if(!bands[i].res[ch]) continue;
322 
323  if(c->oldDSCF[ch][i]){
324  bands[i].scf_idx[ch][0] = get_bits(gb, 7) - 6;
325  c->oldDSCF[ch][i] = 0;
326  }else{
327  t = get_vlc2(gb, dscf_vlc[1].table, MPC8_DSCF1_BITS, 2);
328  if(t == 64)
329  t += get_bits(gb, 6);
330  bands[i].scf_idx[ch][0] = ((bands[i].scf_idx[ch][2] + t - 25) & 0x7F) - 6;
331  }
332  for(j = 0; j < 2; j++){
333  if((bands[i].scfi[ch] << j) & 2)
334  bands[i].scf_idx[ch][j + 1] = bands[i].scf_idx[ch][j];
335  else{
336  t = get_vlc2(gb, dscf_vlc[0].table, MPC8_DSCF0_BITS, 2);
337  if(t == 31)
338  t = 64 + get_bits(gb, 6);
339  bands[i].scf_idx[ch][j + 1] = ((bands[i].scf_idx[ch][j] + t - 25) & 0x7F) - 6;
340  }
341  }
342  }
343  }
344 
345  for(i = 0, off = 0; i < maxband; i++, off += SAMPLES_PER_BAND){
346  for(ch = 0; ch < 2; ch++){
347  res = bands[i].res[ch];
348  switch(res){
349  case -1:
350  for(j = 0; j < SAMPLES_PER_BAND; j++)
351  c->Q[ch][off + j] = (av_lfg_get(&c->rnd) & 0x3FC) - 510;
352  break;
353  case 0:
354  break;
355  case 1:
356  for(j = 0; j < SAMPLES_PER_BAND; j += SAMPLES_PER_BAND / 2){
357  cnt = get_vlc2(gb, q1_vlc.table, MPC8_Q1_BITS, 2);
358  t = mpc8_get_mask(gb, 18, cnt);
359  for(k = 0; k < SAMPLES_PER_BAND / 2; k++, t <<= 1)
360  c->Q[ch][off + j + k] = (t & 0x20000) ? (get_bits1(gb) << 1) - 1 : 0;
361  }
362  break;
363  case 2:
364  cnt = 6;//2*mpc8_thres[res]
365  for(j = 0; j < SAMPLES_PER_BAND; j += 3){
366  t = get_vlc2(gb, q2_vlc[cnt > 3].table, MPC8_Q2_BITS, 2);
367  c->Q[ch][off + j + 0] = mpc8_idx50[t];
368  c->Q[ch][off + j + 1] = mpc8_idx51[t];
369  c->Q[ch][off + j + 2] = mpc8_idx52[t];
370  cnt = (cnt >> 1) + mpc8_huffq2[t];
371  }
372  break;
373  case 3:
374  case 4:
375  for(j = 0; j < SAMPLES_PER_BAND; j += 2){
376  t = get_vlc2(gb, q3_vlc[res - 3].table, MPC8_Q3_BITS, 2) + q3_offsets[res - 3];
377  c->Q[ch][off + j + 1] = t >> 4;
378  c->Q[ch][off + j + 0] = (t & 8) ? (t & 0xF) - 16 : (t & 0xF);
379  }
380  break;
381  case 5:
382  case 6:
383  case 7:
384  case 8:
385  cnt = 2 * mpc8_thres[res];
386  for(j = 0; j < SAMPLES_PER_BAND; j++){
387  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];
388  c->Q[ch][off + j] = t;
389  cnt = (cnt >> 1) + FFABS(c->Q[ch][off + j]);
390  }
391  break;
392  default:
393  for(j = 0; j < SAMPLES_PER_BAND; j++){
394  c->Q[ch][off + j] = get_vlc2(gb, q9up_vlc.table, MPC8_Q9UP_BITS, 2);
395  if(res != 9){
396  c->Q[ch][off + j] <<= res - 9;
397  c->Q[ch][off + j] |= get_bits(gb, res - 9);
398  }
399  c->Q[ch][off + j] -= (1 << (res - 2)) - 1;
400  }
401  }
402  }
403  }
404 
405  ff_mpc_dequantize_and_synth(c, maxband - 1,
406  (int16_t **)frame->extended_data,
407  avctx->channels);
408 
409  c->cur_frame++;
410 
412  if(get_bits_left(gb) < 8) // we have only padding left
413  c->last_bits_used = buf_size << 3;
414  if(c->cur_frame >= c->frames)
415  c->cur_frame = 0;
416 
417  *got_frame_ptr = 1;
418 
419  return c->cur_frame ? c->last_bits_used >> 3 : buf_size;
420 }
421 
423 {
424  MPCContext *c = avctx->priv_data;
425  c->cur_frame = 0;
426 }
427 
429  .name = "mpc8",
430  .long_name = NULL_IF_CONFIG_SMALL("Musepack SV8"),
431  .type = AVMEDIA_TYPE_AUDIO,
432  .id = AV_CODEC_ID_MUSEPACK8,
433  .priv_data_size = sizeof(MPCContext),
437  .capabilities = CODEC_CAP_DR1,
438  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
440 };
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:62
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:135
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
MPADSPContext mpadsp
Definition: mpc.h:54
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:240
static const int8_t mpc8_bands_bits[MPC8_BANDS_SIZE]
Definition: mpc8huff.h:37
#define MPC8_SCFI0_SIZE
Definition: mpc8huff.h:45
int msf
mid-stereo flag
Definition: mpc.h:45
int Q[2][MPC_FRAME_SIZE]
Definition: mpc.h:62
int size
Definition: avcodec.h:974
int res[2]
Definition: mpc.h:46
AVLFG rnd
Definition: mpc.h:66
#define MPC8_DSCF0_SIZE
Definition: mpc8huff.h:69
#define VLC_TYPE
Definition: get_bits.h:62
int last_max_band
Definition: mpc.h:58
#define AV_CH_LAYOUT_STEREO
#define MPC8_Q8_SIZE
Definition: mpc8huff.h:497
AVCodec.
Definition: avcodec.h:2796
#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
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
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
int ff_init_vlc_sparse(VLC *vlc, 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:266
uint8_t bits
Definition: crc.c:251
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1799
static const int8_t mpc8_q4_syms[MPC8_Q4_SIZE]
Definition: mpc8huff.h:376
uint8_t
#define av_cold
Definition: attributes.h:66
#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:1164
static const uint8_t mpc8_dscf1_codes[MPC8_DSCF1_SIZE]
Definition: mpc8huff.h:97
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:684
#define MPC8_BANDS_SIZE
Definition: mpc8huff.h:27
const char data[16]
Definition: mxf.c:70
int scf_idx[2][3]
Definition: mpc.h:48
#define MPC8_DSCF1_BITS
Definition: mpc8huff.h:95
uint8_t * data
Definition: avcodec.h:973
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:194
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
int last_bits_used
Definition: mpc.h:59
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:555
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
#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:63
static VLC dscf_vlc[2]
Definition: mpc8.c:39
sample_fmts
Definition: avconv_filter.c:68
static av_cold int mpc8_decode_init(AVCodecContext *avctx)
Definition: mpc8.c:96
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
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
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
const char * name
Name of the codec implementation.
Definition: avcodec.h:2803
int maxbands
Definition: mpc.h:58
#define SAMPLES_PER_BAND
Definition: mpc.h:40
#define MPC8_Q4_BITS
Definition: mpc8huff.h:347
Definition: get_bits.h:64
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1852
#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:422
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:234
#define FFMIN(a, b)
Definition: common.h:57
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:428
#define FFABS(a)
Definition: common.h:52
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:522
#define MPC8_Q7_OFFSET
Definition: mpc8huff.h:450
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
#define INIT_VLC_USE_NEW_STATIC
Definition: get_bits.h:441
static const uint8_t mpc8_q3_codes[MPC8_Q3_SIZE]
Definition: mpc8huff.h:318
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
int table_allocated
Definition: get_bits.h:67
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:61
#define MPC8_Q7_BITS
Definition: mpc8huff.h:449
AV_SAMPLE_FMT_NONE
Definition: avconv_filter.c:68
av_cold void ff_mpc_init(void)
Definition: mpc.c:38
int scfi[2]
Definition: mpc.h:47
main external API structure.
Definition: avcodec.h:1050
#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:612
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:424
static unsigned int av_lfg_get(AVLFG *c)
Get the next random unsigned 32-bit number using an ALFG.
Definition: lfg.h:38
int extradata_size
Definition: avcodec.h:1165
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:271
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:263
int oldDSCF[2][BANDS]
Definition: mpc.h:60
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:375
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:304
static const uint16_t vlc_offsets[13]
Definition: mpc8.c:92
static const unsigned int mpc8_thres[]
Definition: mpc8data.h:49
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:61
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
static av_cold void flush(AVCodecContext *avctx)
Flush (reset) the frame ID after seeking.
Definition: alsdec.c:1771
#define MPC8_RES_BITS
Definition: mpc8huff.h:121
static const uint8_t mpc8_q2_codes[2][MPC8_Q2_SIZE]
Definition: mpc8huff.h:237
static const int8_t mpc8_q2_bits[2][MPC8_Q2_SIZE]
Definition: mpc8huff.h:275
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
static VLC q1_vlc
Definition: mpc8.c:40
int MSS
Definition: mpc.h:56
void * priv_data
Definition: avcodec.h:1092
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:1792
static VLC res_vlc[2]
Definition: mpc8.c:39
int frames
Definition: mpc.h:63
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:66
#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 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:70
#define MPC8_Q5_BITS
Definition: mpc8huff.h:391
#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:169
#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:950
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:179
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