FFmpeg
on2avc.c
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1 /*
2  * On2 Audio for Video Codec decoder
3  *
4  * Copyright (c) 2013 Konstantin Shishkov
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/ffmath.h"
25 #include "libavutil/float_dsp.h"
26 #include "libavutil/mem_internal.h"
27 
28 #include "avcodec.h"
29 #include "bytestream.h"
30 #include "codec_internal.h"
31 #include "fft.h"
32 #include "get_bits.h"
33 #include "internal.h"
34 
35 #include "on2avcdata.h"
36 
37 #define ON2AVC_SUBFRAME_SIZE 1024
38 
39 enum WindowTypes {
40  WINDOW_TYPE_LONG = 0,
41  WINDOW_TYPE_LONG_STOP,
42  WINDOW_TYPE_LONG_START,
43  WINDOW_TYPE_8SHORT = 3,
44  WINDOW_TYPE_EXT4,
45  WINDOW_TYPE_EXT5,
46  WINDOW_TYPE_EXT6,
47  WINDOW_TYPE_EXT7,
48 };
49 
50 typedef struct On2AVCContext {
51  AVCodecContext *avctx;
52  AVFloatDSPContext *fdsp;
53  FFTContext mdct, mdct_half, mdct_small;
54  FFTContext fft128, fft256, fft512, fft1024;
55  void (*wtf)(struct On2AVCContext *ctx, float *out, float *in, int size);
56 
57  int is_av500;
58 
59  const On2AVCMode *modes;
60  int window_type, prev_window_type;
61  int num_windows, num_bands;
62  int bits_per_section;
63  const int *band_start;
64 
65  int grouping[8];
66  int ms_present;
67  int ms_info[ON2AVC_MAX_BANDS];
68 
69  int is_long;
70 
71  uint8_t band_type[ON2AVC_MAX_BANDS];
72  uint8_t band_run_end[ON2AVC_MAX_BANDS];
73  int num_sections;
74 
75  float band_scales[ON2AVC_MAX_BANDS];
76 
77  VLC scale_diff;
78  VLC cb_vlc[16];
79 
80  float scale_tab[128];
81 
82  DECLARE_ALIGNED(32, float, coeffs)[2][ON2AVC_SUBFRAME_SIZE];
83  DECLARE_ALIGNED(32, float, delay) [2][ON2AVC_SUBFRAME_SIZE];
84 
85  DECLARE_ALIGNED(32, float, temp) [ON2AVC_SUBFRAME_SIZE * 2];
86  DECLARE_ALIGNED(32, float, mdct_buf) [ON2AVC_SUBFRAME_SIZE];
87  DECLARE_ALIGNED(32, float, long_win) [ON2AVC_SUBFRAME_SIZE];
88  DECLARE_ALIGNED(32, float, short_win)[ON2AVC_SUBFRAME_SIZE / 8];
89 } On2AVCContext;
90 
91 static void on2avc_read_ms_info(On2AVCContext *c, GetBitContext *gb)
92 {
93  int w, b, band_off = 0;
94 
95  c->ms_present = get_bits1(gb);
96  if (!c->ms_present)
97  return;
98  for (w = 0; w < c->num_windows; w++) {
99  if (!c->grouping[w]) {
100  memcpy(c->ms_info + band_off,
101  c->ms_info + band_off - c->num_bands,
102  c->num_bands * sizeof(*c->ms_info));
103  band_off += c->num_bands;
104  continue;
105  }
106  for (b = 0; b < c->num_bands; b++)
107  c->ms_info[band_off++] = get_bits1(gb);
108  }
109 }
110 
111 // do not see Table 17 in ISO/IEC 13818-7
112 static int on2avc_decode_band_types(On2AVCContext *c, GetBitContext *gb)
113 {
114  int bits_per_sect = c->is_long ? 5 : 3;
115  int esc_val = (1 << bits_per_sect) - 1;
116  int num_bands = c->num_bands * c->num_windows;
117  int band = 0, i, band_type, run_len, run;
118 
119  while (band < num_bands) {
120  band_type = get_bits(gb, 4);
121  run_len = 1;
122  do {
123  run = get_bits(gb, bits_per_sect);
124  if (run > num_bands - band - run_len) {
125  av_log(c->avctx, AV_LOG_ERROR, "Invalid band type run\n");
126  return AVERROR_INVALIDDATA;
127  }
128  run_len += run;
129  } while (run == esc_val);
130  for (i = band; i < band + run_len; i++) {
131  c->band_type[i] = band_type;
132  c->band_run_end[i] = band + run_len;
133  }
134  band += run_len;
135  }
136 
137  return 0;
138 }
139 
140 // completely not like Table 18 in ISO/IEC 13818-7
141 // (no intensity stereo, different coding for the first coefficient)
142 static int on2avc_decode_band_scales(On2AVCContext *c, GetBitContext *gb)
143 {
144  int w, w2, b, scale, first = 1;
145  int band_off = 0;
146 
147  for (w = 0; w < c->num_windows; w++) {
148  if (!c->grouping[w]) {
149  memcpy(c->band_scales + band_off,
150  c->band_scales + band_off - c->num_bands,
151  c->num_bands * sizeof(*c->band_scales));
152  band_off += c->num_bands;
153  continue;
154  }
155  for (b = 0; b < c->num_bands; b++) {
156  if (!c->band_type[band_off]) {
157  int all_zero = 1;
158  for (w2 = w + 1; w2 < c->num_windows; w2++) {
159  if (c->grouping[w2])
160  break;
161  if (c->band_type[w2 * c->num_bands + b]) {
162  all_zero = 0;
163  break;
164  }
165  }
166  if (all_zero) {
167  c->band_scales[band_off++] = 0;
168  continue;
169  }
170  }
171  if (first) {
172  scale = get_bits(gb, 7);
173  first = 0;
174  } else {
175  scale += get_vlc2(gb, c->scale_diff.table, 9, 3);
176  }
177  if (scale < 0 || scale > 127) {
178  av_log(c->avctx, AV_LOG_ERROR, "Invalid scale value %d\n",
179  scale);
180  return AVERROR_INVALIDDATA;
181  }
182  c->band_scales[band_off++] = c->scale_tab[scale];
183  }
184  }
185 
186  return 0;
187 }
188 
189 static inline float on2avc_scale(int v, float scale)
190 {
191  return v * sqrtf(abs(v)) * scale;
192 }
193 
194 // spectral data is coded completely differently - there are no unsigned codebooks
195 static int on2avc_decode_quads(On2AVCContext *c, GetBitContext *gb, float *dst,
196  int dst_size, int type, float band_scale)
197 {
198  int i, j, val, val1;
199 
200  for (i = 0; i < dst_size; i += 4) {
201  val = get_vlc2(gb, c->cb_vlc[type].table, 9, 2);
202 
203  for (j = 0; j < 4; j++) {
204  val1 = sign_extend((val >> (12 - j * 4)) & 0xF, 4);
205  *dst++ = on2avc_scale(val1, band_scale);
206  }
207  }
208 
209  return 0;
210 }
211 
212 static inline int get_egolomb(GetBitContext *gb)
213 {
214  int v = 4;
215 
216  while (get_bits1(gb)) {
217  v++;
218  if (v > 30) {
219  av_log(NULL, AV_LOG_WARNING, "Too large golomb code in get_egolomb.\n");
220  v = 30;
221  break;
222  }
223  }
224 
225  return (1 << v) + get_bits_long(gb, v);
226 }
227 
228 static int on2avc_decode_pairs(On2AVCContext *c, GetBitContext *gb, float *dst,
229  int dst_size, int type, float band_scale)
230 {
231  int i, val, val1, val2, sign;
232 
233  for (i = 0; i < dst_size; i += 2) {
234  val = get_vlc2(gb, c->cb_vlc[type].table, 9, 2);
235 
236  val1 = sign_extend(val >> 8, 8);
237  val2 = sign_extend(val & 0xFF, 8);
238  if (type == ON2AVC_ESC_CB) {
239  if (val1 <= -16 || val1 >= 16) {
240  sign = 1 - (val1 < 0) * 2;
241  val1 = sign * get_egolomb(gb);
242  }
243  if (val2 <= -16 || val2 >= 16) {
244  sign = 1 - (val2 < 0) * 2;
245  val2 = sign * get_egolomb(gb);
246  }
247  }
248 
249  *dst++ = on2avc_scale(val1, band_scale);
250  *dst++ = on2avc_scale(val2, band_scale);
251  }
252 
253  return 0;
254 }
255 
256 static int on2avc_read_channel_data(On2AVCContext *c, GetBitContext *gb, int ch)
257 {
258  int ret;
259  int w, b, band_idx;
260  float *coeff_ptr;
261 
262  if ((ret = on2avc_decode_band_types(c, gb)) < 0)
263  return ret;
264  if ((ret = on2avc_decode_band_scales(c, gb)) < 0)
265  return ret;
266 
267  coeff_ptr = c->coeffs[ch];
268  band_idx = 0;
269  memset(coeff_ptr, 0, ON2AVC_SUBFRAME_SIZE * sizeof(*coeff_ptr));
270  for (w = 0; w < c->num_windows; w++) {
271  for (b = 0; b < c->num_bands; b++) {
272  int band_size = c->band_start[b + 1] - c->band_start[b];
273  int band_type = c->band_type[band_idx + b];
274 
275  if (!band_type) {
276  coeff_ptr += band_size;
277  continue;
278  }
279  if (band_type < 9)
280  on2avc_decode_quads(c, gb, coeff_ptr, band_size, band_type,
281  c->band_scales[band_idx + b]);
282  else
283  on2avc_decode_pairs(c, gb, coeff_ptr, band_size, band_type,
284  c->band_scales[band_idx + b]);
285  coeff_ptr += band_size;
286  }
287  band_idx += c->num_bands;
288  }
289 
290  return 0;
291 }
292 
293 static int on2avc_apply_ms(On2AVCContext *c)
294 {
295  int w, b, i;
296  int band_off = 0;
297  float *ch0 = c->coeffs[0];
298  float *ch1 = c->coeffs[1];
299 
300  for (w = 0; w < c->num_windows; w++) {
301  for (b = 0; b < c->num_bands; b++) {
302  if (c->ms_info[band_off + b]) {
303  for (i = c->band_start[b]; i < c->band_start[b + 1]; i++) {
304  float l = *ch0, r = *ch1;
305  *ch0++ = l + r;
306  *ch1++ = l - r;
307  }
308  } else {
309  ch0 += c->band_start[b + 1] - c->band_start[b];
310  ch1 += c->band_start[b + 1] - c->band_start[b];
311  }
312  }
313  band_off += c->num_bands;
314  }
315  return 0;
316 }
317 
318 static void zero_head_and_tail(float *src, int len, int order0, int order1)
319 {
320  memset(src, 0, sizeof(*src) * order0);
321  memset(src + len - order1, 0, sizeof(*src) * order1);
322 }
323 
324 static void pretwiddle(float *src, float *dst, int dst_len, int tab_step,
325  int step, int order0, int order1, const double * const *tabs)
326 {
327  float *src2, *out;
328  const double *tab;
329  int i, j;
330 
331  out = dst;
332  tab = tabs[0];
333  for (i = 0; i < tab_step; i++) {
334  double sum = 0;
335  for (j = 0; j < order0; j++)
336  sum += src[j] * tab[j * tab_step + i];
337  out[i] += sum;
338  }
339 
340  out = dst + dst_len - tab_step;
341  tab = tabs[order0];
342  src2 = src + (dst_len - tab_step) / step + 1 + order0;
343  for (i = 0; i < tab_step; i++) {
344  double sum = 0;
345  for (j = 0; j < order1; j++)
346  sum += src2[j] * tab[j * tab_step + i];
347  out[i] += sum;
348  }
349 }
350 
351 static void twiddle(float *src1, float *src2, int src2_len,
352  const double *tab, int tab_len, int step,
353  int order0, int order1, const double * const *tabs)
354 {
355  int steps;
356  int mask;
357  int i, j;
358 
359  steps = (src2_len - tab_len) / step + 1;
360  pretwiddle(src1, src2, src2_len, tab_len, step, order0, order1, tabs);
361  mask = tab_len - 1;
362 
363  for (i = 0; i < steps; i++) {
364  float in0 = src1[order0 + i];
365  int pos = (src2_len - 1) & mask;
366 
367  if (pos < tab_len) {
368  const double *t = tab;
369  for (j = pos; j >= 0; j--)
370  src2[j] += in0 * *t++;
371  for (j = 0; j < tab_len - pos - 1; j++)
372  src2[src2_len - j - 1] += in0 * tab[pos + 1 + j];
373  } else {
374  for (j = 0; j < tab_len; j++)
375  src2[pos - j] += in0 * tab[j];
376  }
377  mask = pos + step;
378  }
379 }
380 
381 #define CMUL1_R(s, t, is, it) \
382  s[is + 0] * t[it + 0] - s[is + 1] * t[it + 1]
383 #define CMUL1_I(s, t, is, it) \
384  s[is + 0] * t[it + 1] + s[is + 1] * t[it + 0]
385 #define CMUL2_R(s, t, is, it) \
386  s[is + 0] * t[it + 0] + s[is + 1] * t[it + 1]
387 #define CMUL2_I(s, t, is, it) \
388  s[is + 0] * t[it + 1] - s[is + 1] * t[it + 0]
389 
390 #define CMUL0(dst, id, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
391  dst[id] = s0[is] * t0[it] + s1[is] * t1[it] \
392  + s2[is] * t2[it] + s3[is] * t3[it]; \
393  dst[id + 1] = s0[is] * t0[it + 1] + s1[is] * t1[it + 1] \
394  + s2[is] * t2[it + 1] + s3[is] * t3[it + 1];
395 
396 #define CMUL1(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
397  *dst++ = CMUL1_R(s0, t0, is, it) \
398  + CMUL1_R(s1, t1, is, it) \
399  + CMUL1_R(s2, t2, is, it) \
400  + CMUL1_R(s3, t3, is, it); \
401  *dst++ = CMUL1_I(s0, t0, is, it) \
402  + CMUL1_I(s1, t1, is, it) \
403  + CMUL1_I(s2, t2, is, it) \
404  + CMUL1_I(s3, t3, is, it);
405 
406 #define CMUL2(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
407  *dst++ = CMUL2_R(s0, t0, is, it) \
408  + CMUL2_R(s1, t1, is, it) \
409  + CMUL2_R(s2, t2, is, it) \
410  + CMUL2_R(s3, t3, is, it); \
411  *dst++ = CMUL2_I(s0, t0, is, it) \
412  + CMUL2_I(s1, t1, is, it) \
413  + CMUL2_I(s2, t2, is, it) \
414  + CMUL2_I(s3, t3, is, it);
415 
416 static void combine_fft(float *s0, float *s1, float *s2, float *s3, float *dst,
417  const float *t0, const float *t1,
418  const float *t2, const float *t3, int len, int step)
419 {
420  const float *h0, *h1, *h2, *h3;
421  float *d1, *d2;
422  int tmp, half;
423  int len2 = len >> 1, len4 = len >> 2;
424  int hoff;
425  int i, j, k;
426 
427  tmp = step;
428  for (half = len2; tmp > 1; half <<= 1, tmp >>= 1);
429 
430  h0 = t0 + half;
431  h1 = t1 + half;
432  h2 = t2 + half;
433  h3 = t3 + half;
434 
435  CMUL0(dst, 0, s0, s1, s2, s3, t0, t1, t2, t3, 0, 0);
436 
437  hoff = 2 * step * (len4 >> 1);
438 
439  j = 2;
440  k = 2 * step;
441  d1 = dst + 2;
442  d2 = dst + 2 + (len >> 1);
443  for (i = 0; i < (len4 - 1) >> 1; i++) {
444  CMUL1(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k);
445  CMUL1(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k);
446  j += 2;
447  k += 2 * step;
448  }
449  CMUL0(dst, len4, s0, s1, s2, s3, t0, t1, t2, t3, 1, hoff);
450  CMUL0(dst, len4 + len2, s0, s1, s2, s3, h0, h1, h2, h3, 1, hoff);
451 
452  j = len4;
453  k = hoff + 2 * step * len4;
454  d1 = dst + len4 + 2;
455  d2 = dst + len4 + 2 + len2;
456  for (i = 0; i < (len4 - 2) >> 1; i++) {
457  CMUL2(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k);
458  CMUL2(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k);
459  j -= 2;
460  k += 2 * step;
461  }
462  CMUL0(dst, len2 + 4, s0, s1, s2, s3, t0, t1, t2, t3, 0, k);
463 }
464 
465 static void wtf_end_512(On2AVCContext *c, float *out, float *src,
466  float *tmp0, float *tmp1)
467 {
468  memcpy(src, tmp0, 384 * sizeof(*tmp0));
469  memcpy(tmp0 + 384, src + 384, 128 * sizeof(*tmp0));
470 
471  zero_head_and_tail(src, 128, 16, 4);
472  zero_head_and_tail(src + 128, 128, 16, 4);
473  zero_head_and_tail(src + 256, 128, 13, 7);
474  zero_head_and_tail(src + 384, 128, 15, 5);
475 
476  c->fft128.fft_permute(&c->fft128, (FFTComplex*)src);
477  c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 128));
478  c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 256));
479  c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 384));
480  c->fft128.fft_calc(&c->fft128, (FFTComplex*)src);
481  c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 128));
482  c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 256));
483  c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 384));
484  combine_fft(src, src + 128, src + 256, src + 384, tmp1,
485  ff_on2avc_ctab_1, ff_on2avc_ctab_2,
486  ff_on2avc_ctab_3, ff_on2avc_ctab_4, 512, 2);
487  c->fft512.fft_permute(&c->fft512, (FFTComplex*)tmp1);
488  c->fft512.fft_calc(&c->fft512, (FFTComplex*)tmp1);
489 
490  pretwiddle(&tmp0[ 0], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
491  pretwiddle(&tmp0[128], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
492  pretwiddle(&tmp0[256], tmp1, 512, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
493  pretwiddle(&tmp0[384], tmp1, 512, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
494 
495  memcpy(src, tmp1, 512 * sizeof(float));
496 }
497 
498 static void wtf_end_1024(On2AVCContext *c, float *out, float *src,
499  float *tmp0, float *tmp1)
500 {
501  memcpy(src, tmp0, 768 * sizeof(*tmp0));
502  memcpy(tmp0 + 768, src + 768, 256 * sizeof(*tmp0));
503 
504  zero_head_and_tail(src, 256, 16, 4);
505  zero_head_and_tail(src + 256, 256, 16, 4);
506  zero_head_and_tail(src + 512, 256, 13, 7);
507  zero_head_and_tail(src + 768, 256, 15, 5);
508 
509  c->fft256.fft_permute(&c->fft256, (FFTComplex*)src);
510  c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 256));
511  c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 512));
512  c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 768));
513  c->fft256.fft_calc(&c->fft256, (FFTComplex*)src);
514  c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 256));
515  c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 512));
516  c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 768));
517  combine_fft(src, src + 256, src + 512, src + 768, tmp1,
518  ff_on2avc_ctab_1, ff_on2avc_ctab_2,
519  ff_on2avc_ctab_3, ff_on2avc_ctab_4, 1024, 1);
520  c->fft1024.fft_permute(&c->fft1024, (FFTComplex*)tmp1);
521  c->fft1024.fft_calc(&c->fft1024, (FFTComplex*)tmp1);
522 
523  pretwiddle(&tmp0[ 0], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
524  pretwiddle(&tmp0[256], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
525  pretwiddle(&tmp0[512], tmp1, 1024, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
526  pretwiddle(&tmp0[768], tmp1, 1024, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
527 
528  memcpy(src, tmp1, 1024 * sizeof(float));
529 }
530 
531 static void wtf_40(On2AVCContext *c, float *out, float *src, int size)
532 {
533  float *tmp0 = c->temp, *tmp1 = c->temp + 1024;
534 
535  memset(tmp0, 0, sizeof(*tmp0) * 1024);
536  memset(tmp1, 0, sizeof(*tmp1) * 1024);
537 
538  if (size == 512) {
539  twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
540  twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
541  twiddle(src + 16, &tmp0[ 16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
542  twiddle(src + 24, &tmp0[ 16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
543  twiddle(src + 32, &tmp0[ 32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
544  twiddle(src + 40, &tmp0[ 32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
545  twiddle(src + 48, &tmp0[ 48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
546  twiddle(src + 56, &tmp0[ 48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
547  twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
548  twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
549  twiddle(&tmp0[32], &tmp1[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
550  twiddle(&tmp0[48], &tmp1[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
551  twiddle(src + 64, &tmp1[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
552  twiddle(src + 80, &tmp1[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
553  twiddle(src + 96, &tmp1[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
554  twiddle(src + 112, &tmp1[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
555  twiddle(src + 128, &tmp1[128], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
556  twiddle(src + 144, &tmp1[128], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
557  twiddle(src + 160, &tmp1[160], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
558  twiddle(src + 176, &tmp1[160], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
559 
560  memset(tmp0, 0, 64 * sizeof(*tmp0));
561 
562  twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
563  twiddle(&tmp1[ 32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
564  twiddle(&tmp1[ 64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
565  twiddle(&tmp1[ 96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
566  twiddle(&tmp1[128], &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
567  twiddle(&tmp1[160], &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
568  twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
569  twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
570  twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
571  twiddle(src + 288, &tmp0[256], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
572  twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
573  twiddle(src + 352, &tmp0[256], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
574 
575  wtf_end_512(c, out, src, tmp0, tmp1);
576  } else {
577  twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
578  twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
579  twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
580  twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
581  twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
582  twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
583  twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
584  twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
585  twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
586  twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
587  twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
588  twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
589  twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
590  twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
591  twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
592  twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
593  twiddle(src + 256, &tmp1[256], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
594  twiddle(src + 288, &tmp1[256], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
595  twiddle(src + 320, &tmp1[320], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
596  twiddle(src + 352, &tmp1[320], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
597 
598  memset(tmp0, 0, 128 * sizeof(*tmp0));
599 
600  twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
601  twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
602  twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
603  twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
604  twiddle(&tmp1[256], &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
605  twiddle(&tmp1[320], &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
606  twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
607  twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
608  twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
609  twiddle(src + 576, &tmp0[512], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
610  twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
611  twiddle(src + 704, &tmp0[512], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
612 
613  wtf_end_1024(c, out, src, tmp0, tmp1);
614  }
615 }
616 
617 static void wtf_44(On2AVCContext *c, float *out, float *src, int size)
618 {
619  float *tmp0 = c->temp, *tmp1 = c->temp + 1024;
620 
621  memset(tmp0, 0, sizeof(*tmp0) * 1024);
622  memset(tmp1, 0, sizeof(*tmp1) * 1024);
623 
624  if (size == 512) {
625  twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
626  twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
627  twiddle(src + 16, &tmp0[16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
628  twiddle(src + 24, &tmp0[16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
629  twiddle(src + 32, &tmp0[32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
630  twiddle(src + 40, &tmp0[32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
631  twiddle(src + 48, &tmp0[48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
632  twiddle(src + 56, &tmp0[48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
633  twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
634  twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
635  twiddle(&tmp0[32], &tmp1[32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
636  twiddle(&tmp0[48], &tmp1[32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
637  twiddle(src + 64, &tmp1[64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
638  twiddle(src + 80, &tmp1[64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
639  twiddle(src + 96, &tmp1[96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
640  twiddle(src + 112, &tmp1[96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
641 
642  memset(tmp0, 0, 64 * sizeof(*tmp0));
643 
644  twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
645  twiddle(&tmp1[32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
646  twiddle(&tmp1[64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
647  twiddle(&tmp1[96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
648  twiddle(src + 128, &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
649  twiddle(src + 160, &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
650  twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
651  twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
652  twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
653  twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
654 
655  wtf_end_512(c, out, src, tmp0, tmp1);
656  } else {
657  twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
658  twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
659  twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
660  twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
661  twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
662  twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
663  twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
664  twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
665  twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
666  twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
667  twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
668  twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
669  twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
670  twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
671  twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
672  twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
673 
674  memset(tmp0, 0, 128 * sizeof(*tmp0));
675 
676  twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
677  twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
678  twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
679  twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
680  twiddle(src + 256, &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
681  twiddle(src + 320, &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
682  twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
683  twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
684  twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
685  twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
686 
687  wtf_end_1024(c, out, src, tmp0, tmp1);
688  }
689 }
690 
691 static int on2avc_reconstruct_channel_ext(On2AVCContext *c, AVFrame *dst, int offset)
692 {
693  int ch, i;
694 
695  for (ch = 0; ch < c->avctx->ch_layout.nb_channels; ch++) {
696  float *out = (float*)dst->extended_data[ch] + offset;
697  float *in = c->coeffs[ch];
698  float *saved = c->delay[ch];
699  float *buf = c->mdct_buf;
700  float *wout = out + 448;
701 
702  switch (c->window_type) {
703  case WINDOW_TYPE_EXT7:
704  c->mdct.imdct_half(&c->mdct, buf, in);
705  break;
706  case WINDOW_TYPE_EXT4:
707  c->wtf(c, buf, in, 1024);
708  break;
709  case WINDOW_TYPE_EXT5:
710  c->wtf(c, buf, in, 512);
711  c->mdct.imdct_half(&c->mdct_half, buf + 512, in + 512);
712  for (i = 0; i < 256; i++) {
713  FFSWAP(float, buf[i + 512], buf[1023 - i]);
714  }
715  break;
716  case WINDOW_TYPE_EXT6:
717  c->mdct.imdct_half(&c->mdct_half, buf, in);
718  for (i = 0; i < 256; i++) {
719  FFSWAP(float, buf[i], buf[511 - i]);
720  }
721  c->wtf(c, buf + 512, in + 512, 512);
722  break;
723  }
724 
725  memcpy(out, saved, 448 * sizeof(float));
726  c->fdsp->vector_fmul_window(wout, saved + 448, buf, c->short_win, 64);
727  memcpy(wout + 128, buf + 64, 448 * sizeof(float));
728  memcpy(saved, buf + 512, 448 * sizeof(float));
729  memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
730  }
731 
732  return 0;
733 }
734 
735 // not borrowed from aacdec.c - the codec has original design after all
736 static int on2avc_reconstruct_channel(On2AVCContext *c, int channel,
737  AVFrame *dst, int offset)
738 {
739  int i;
740  float *out = (float*)dst->extended_data[channel] + offset;
741  float *in = c->coeffs[channel];
742  float *saved = c->delay[channel];
743  float *buf = c->mdct_buf;
744  float *temp = c->temp;
745 
746  switch (c->window_type) {
747  case WINDOW_TYPE_LONG_START:
748  case WINDOW_TYPE_LONG_STOP:
749  case WINDOW_TYPE_LONG:
750  c->mdct.imdct_half(&c->mdct, buf, in);
751  break;
752  case WINDOW_TYPE_8SHORT:
753  for (i = 0; i < ON2AVC_SUBFRAME_SIZE; i += ON2AVC_SUBFRAME_SIZE / 8)
754  c->mdct_small.imdct_half(&c->mdct_small, buf + i, in + i);
755  break;
756  }
757 
758  if ((c->prev_window_type == WINDOW_TYPE_LONG ||
759  c->prev_window_type == WINDOW_TYPE_LONG_STOP) &&
760  (c->window_type == WINDOW_TYPE_LONG ||
761  c->window_type == WINDOW_TYPE_LONG_START)) {
762  c->fdsp->vector_fmul_window(out, saved, buf, c->long_win, 512);
763  } else {
764  float *wout = out + 448;
765  memcpy(out, saved, 448 * sizeof(float));
766 
767  if (c->window_type == WINDOW_TYPE_8SHORT) {
768  c->fdsp->vector_fmul_window(wout + 0*128, saved + 448, buf + 0*128, c->short_win, 64);
769  c->fdsp->vector_fmul_window(wout + 1*128, buf + 0*128 + 64, buf + 1*128, c->short_win, 64);
770  c->fdsp->vector_fmul_window(wout + 2*128, buf + 1*128 + 64, buf + 2*128, c->short_win, 64);
771  c->fdsp->vector_fmul_window(wout + 3*128, buf + 2*128 + 64, buf + 3*128, c->short_win, 64);
772  c->fdsp->vector_fmul_window(temp, buf + 3*128 + 64, buf + 4*128, c->short_win, 64);
773  memcpy(wout + 4*128, temp, 64 * sizeof(float));
774  } else {
775  c->fdsp->vector_fmul_window(wout, saved + 448, buf, c->short_win, 64);
776  memcpy(wout + 128, buf + 64, 448 * sizeof(float));
777  }
778  }
779 
780  // buffer update
781  switch (c->window_type) {
782  case WINDOW_TYPE_8SHORT:
783  memcpy(saved, temp + 64, 64 * sizeof(float));
784  c->fdsp->vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, c->short_win, 64);
785  c->fdsp->vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, c->short_win, 64);
786  c->fdsp->vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, c->short_win, 64);
787  memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
788  break;
789  case WINDOW_TYPE_LONG_START:
790  memcpy(saved, buf + 512, 448 * sizeof(float));
791  memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
792  break;
793  case WINDOW_TYPE_LONG_STOP:
794  case WINDOW_TYPE_LONG:
795  memcpy(saved, buf + 512, 512 * sizeof(float));
796  break;
797  }
798  return 0;
799 }
800 
801 static int on2avc_decode_subframe(On2AVCContext *c, const uint8_t *buf,
802  int buf_size, AVFrame *dst, int offset)
803 {
804  GetBitContext gb;
805  int i, ret;
806 
807  if ((ret = init_get_bits8(&gb, buf, buf_size)) < 0)
808  return ret;
809 
810  if (get_bits1(&gb)) {
811  av_log(c->avctx, AV_LOG_ERROR, "enh bit set\n");
812  return AVERROR_INVALIDDATA;
813  }
814  c->prev_window_type = c->window_type;
815  c->window_type = get_bits(&gb, 3);
816 
817  c->band_start = c->modes[c->window_type].band_start;
818  c->num_windows = c->modes[c->window_type].num_windows;
819  c->num_bands = c->modes[c->window_type].num_bands;
820  c->is_long = (c->window_type != WINDOW_TYPE_8SHORT);
821 
822  c->grouping[0] = 1;
823  for (i = 1; i < c->num_windows; i++)
824  c->grouping[i] = !get_bits1(&gb);
825 
826  on2avc_read_ms_info(c, &gb);
827  for (i = 0; i < c->avctx->ch_layout.nb_channels; i++)
828  if ((ret = on2avc_read_channel_data(c, &gb, i)) < 0)
829  return AVERROR_INVALIDDATA;
830  if (c->avctx->ch_layout.nb_channels == 2 && c->ms_present)
831  on2avc_apply_ms(c);
832  if (c->window_type < WINDOW_TYPE_EXT4) {
833  for (i = 0; i < c->avctx->ch_layout.nb_channels; i++)
834  on2avc_reconstruct_channel(c, i, dst, offset);
835  } else {
836  on2avc_reconstruct_channel_ext(c, dst, offset);
837  }
838 
839  return 0;
840 }
841 
842 static int on2avc_decode_frame(AVCodecContext * avctx, AVFrame *frame,
843  int *got_frame_ptr, AVPacket *avpkt)
844 {
845  const uint8_t *buf = avpkt->data;
846  int buf_size = avpkt->size;
847  On2AVCContext *c = avctx->priv_data;
848  GetByteContext gb;
849  int num_frames = 0, frame_size, audio_off;
850  int ret;
851 
852  if (c->is_av500) {
853  /* get output buffer */
854  frame->nb_samples = ON2AVC_SUBFRAME_SIZE;
855  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
856  return ret;
857 
858  if ((ret = on2avc_decode_subframe(c, buf, buf_size, frame, 0)) < 0)
859  return ret;
860  } else {
861  bytestream2_init(&gb, buf, buf_size);
862  while (bytestream2_get_bytes_left(&gb) > 2) {
863  frame_size = bytestream2_get_le16(&gb);
864  if (!frame_size || frame_size > bytestream2_get_bytes_left(&gb)) {
865  av_log(avctx, AV_LOG_ERROR, "Invalid subframe size %d\n",
866  frame_size);
867  return AVERROR_INVALIDDATA;
868  }
869  num_frames++;
870  bytestream2_skip(&gb, frame_size);
871  }
872  if (!num_frames) {
873  av_log(avctx, AV_LOG_ERROR, "No subframes present\n");
874  return AVERROR_INVALIDDATA;
875  }
876 
877  /* get output buffer */
878  frame->nb_samples = ON2AVC_SUBFRAME_SIZE * num_frames;
879  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
880  return ret;
881 
882  audio_off = 0;
883  bytestream2_init(&gb, buf, buf_size);
884  while (bytestream2_get_bytes_left(&gb) > 2) {
885  frame_size = bytestream2_get_le16(&gb);
886  if ((ret = on2avc_decode_subframe(c, gb.buffer, frame_size,
887  frame, audio_off)) < 0)
888  return ret;
889  audio_off += ON2AVC_SUBFRAME_SIZE;
890  bytestream2_skip(&gb, frame_size);
891  }
892  }
893 
894  *got_frame_ptr = 1;
895 
896  return buf_size;
897 }
898 
899 static av_cold void on2avc_free_vlcs(On2AVCContext *c)
900 {
901  int i;
902 
903  ff_free_vlc(&c->scale_diff);
904  for (i = 1; i < 16; i++)
905  ff_free_vlc(&c->cb_vlc[i]);
906 }
907 
908 static av_cold int on2avc_decode_init(AVCodecContext *avctx)
909 {
910  On2AVCContext *c = avctx->priv_data;
911  const uint8_t *lens = ff_on2avc_cb_lens;
912  const uint16_t *syms = ff_on2avc_cb_syms;
913  int channels = avctx->ch_layout.nb_channels;
914  int i, ret;
915 
916  if (channels > 2U) {
917  avpriv_request_sample(avctx, "Decoding more than 2 channels");
918  return AVERROR_PATCHWELCOME;
919  }
920 
921  c->avctx = avctx;
922  avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
923  av_channel_layout_uninit(&avctx->ch_layout);
924  avctx->ch_layout = (channels == 2) ? (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO :
925  (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
926 
927  c->is_av500 = (avctx->codec_tag == 0x500);
928 
929  if (channels == 2)
930  av_log(avctx, AV_LOG_WARNING,
931  "Stereo mode support is not good, patch is welcome\n");
932 
933  // We add -0.01 before ceil() to avoid any values to fall at exactly the
934  // midpoint between different ceil values. The results are identical to
935  // using pow(10, i / 10.0) without such bias
936  for (i = 0; i < 20; i++)
937  c->scale_tab[i] = ceil(ff_exp10(i * 0.1) * 16 - 0.01) / 32;
938  for (; i < 128; i++)
939  c->scale_tab[i] = ceil(ff_exp10(i * 0.1) * 0.5 - 0.01);
940 
941  if (avctx->sample_rate < 32000 || channels == 1)
942  memcpy(c->long_win, ff_on2avc_window_long_24000,
943  1024 * sizeof(*c->long_win));
944  else
945  memcpy(c->long_win, ff_on2avc_window_long_32000,
946  1024 * sizeof(*c->long_win));
947  memcpy(c->short_win, ff_on2avc_window_short, 128 * sizeof(*c->short_win));
948 
949  c->modes = (avctx->sample_rate <= 40000) ? ff_on2avc_modes_40
950  : ff_on2avc_modes_44;
951  c->wtf = (avctx->sample_rate <= 40000) ? wtf_40
952  : wtf_44;
953 
954  ff_mdct_init(&c->mdct, 11, 1, 1.0 / (32768.0 * 1024.0));
955  ff_mdct_init(&c->mdct_half, 10, 1, 1.0 / (32768.0 * 512.0));
956  ff_mdct_init(&c->mdct_small, 8, 1, 1.0 / (32768.0 * 128.0));
957  ff_fft_init(&c->fft128, 6, 0);
958  ff_fft_init(&c->fft256, 7, 0);
959  ff_fft_init(&c->fft512, 8, 1);
960  ff_fft_init(&c->fft1024, 9, 1);
961  c->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
962  if (!c->fdsp)
963  return AVERROR(ENOMEM);
964 
965  ret = ff_init_vlc_from_lengths(&c->scale_diff, 9, ON2AVC_SCALE_DIFFS,
966  ff_on2avc_scale_diff_bits, 1,
967  ff_on2avc_scale_diff_syms, 1, 1, -60, 0, avctx);
968  if (ret < 0)
969  goto vlc_fail;
970  for (i = 1; i < 16; i++) {
971  int idx = i - 1;
972  ret = ff_init_vlc_from_lengths(&c->cb_vlc[i], 9, ff_on2avc_cb_elems[idx],
973  lens, 1,
974  syms, 2, 2, 0, 0, avctx);
975  if (ret < 0)
976  goto vlc_fail;
977  lens += ff_on2avc_cb_elems[idx];
978  syms += ff_on2avc_cb_elems[idx];
979  }
980 
981  return 0;
982 vlc_fail:
983  av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n");
984  return ret;
985 }
986 
987 static av_cold int on2avc_decode_close(AVCodecContext *avctx)
988 {
989  On2AVCContext *c = avctx->priv_data;
990 
991  ff_mdct_end(&c->mdct);
992  ff_mdct_end(&c->mdct_half);
993  ff_mdct_end(&c->mdct_small);
994  ff_fft_end(&c->fft128);
995  ff_fft_end(&c->fft256);
996  ff_fft_end(&c->fft512);
997  ff_fft_end(&c->fft1024);
998 
999  av_freep(&c->fdsp);
1000 
1001  on2avc_free_vlcs(c);
1002 
1003  return 0;
1004 }
1005 
1006 
1007 const FFCodec ff_on2avc_decoder = {
1008  .p.name = "on2avc",
1009  .p.long_name = NULL_IF_CONFIG_SMALL("On2 Audio for Video Codec"),
1010  .p.type = AVMEDIA_TYPE_AUDIO,
1011  .p.id = AV_CODEC_ID_ON2AVC,
1012  .priv_data_size = sizeof(On2AVCContext),
1013  .init = on2avc_decode_init,
1014  FF_CODEC_DECODE_CB(on2avc_decode_frame),
1015  .close = on2avc_decode_close,
1016  .p.capabilities = AV_CODEC_CAP_DR1,
1017  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1018  .p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1019  AV_SAMPLE_FMT_NONE },
1020 };
on2avc_decode_quads
static int on2avc_decode_quads(On2AVCContext *c, GetBitContext *gb, float *dst, int dst_size, int type, float band_scale)
Definition: on2avc.c:195
ff_fft_init
#define ff_fft_init
Definition: fft.h:135
get_egolomb
static int get_egolomb(GetBitContext *gb)
Definition: on2avc.c:212
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:66
on2avc_decode_init
static av_cold int on2avc_decode_init(AVCodecContext *avctx)
Definition: on2avc.c:908
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
h0
static const float h0[64]
Definition: speexdata.h:741
on2avc_apply_ms
static int on2avc_apply_ms(On2AVCContext *c)
Definition: on2avc.c:293
ff_on2avc_decoder
const FFCodec ff_on2avc_decoder
Definition: on2avc.c:1007
ff_exp10
static av_always_inline double ff_exp10(double x)
Compute 10^x for floating point values.
Definition: ffmath.h:42
on2avc_scale
static float on2avc_scale(int v, float scale)
Definition: on2avc.c:189
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: codec_internal.h:39
r
const char * r
Definition: vf_curves.c:116
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
WINDOW_TYPE_EXT4
@ WINDOW_TYPE_EXT4
Definition: on2avc.c:44
mem_internal.h
ff_on2avc_cb_lens
const uint8_t ff_on2avc_cb_lens[]
Definition: on2avcdata.c:146
out
FILE * out
Definition: movenc.c:54
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:998
GetByteContext
Definition: bytestream.h:33
On2AVCContext::cb_vlc
VLC cb_vlc[16]
Definition: on2avc.c:78
twiddle
static void twiddle(float *src1, float *src2, int src2_len, const double *tab, int tab_len, int step, int order0, int order1, const double *const *tabs)
Definition: on2avc.c:351
On2AVCContext::fdsp
AVFloatDSPContext * fdsp
Definition: on2avc.c:52
ON2AVC_ESC_CB
#define ON2AVC_ESC_CB
Definition: on2avcdata.h:29
ff_on2avc_tabs_19_40_2
const double *const ff_on2avc_tabs_19_40_2[19]
Definition: on2avcdata.c:3386
On2AVCContext::ms_present
int ms_present
Definition: on2avc.c:66
src1
const pixel * src1
Definition: h264pred_template.c:421
On2AVCContext::delay
float delay[2][ON2AVC_SUBFRAME_SIZE]
Definition: on2avc.c:83
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
wtf_44
static void wtf_44(On2AVCContext *c, float *out, float *src, int size)
Definition: on2avc.c:617
ON2AVC_SCALE_DIFFS
#define ON2AVC_SCALE_DIFFS
Definition: on2avcdata.h:40
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:58
w
uint8_t w
Definition: llviddspenc.c:38
On2AVCContext::ms_info
int ms_info[ON2AVC_MAX_BANDS]
Definition: on2avc.c:67
On2AVCContext::short_win
float short_win[ON2AVC_SUBFRAME_SIZE/8]
Definition: on2avc.c:88
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
t0
#define t0
Definition: regdef.h:28
b
#define b
Definition: input.c:34
on2avc_reconstruct_channel
static int on2avc_reconstruct_channel(On2AVCContext *c, int channel, AVFrame *dst, int offset)
Definition: on2avc.c:736
ff_mdct_init
#define ff_mdct_init
Definition: fft.h:153
half
static uint8_t half(int a, int b)
Definition: mobiclip.c:541
on2avc_decode_pairs
static int on2avc_decode_pairs(On2AVCContext *c, GetBitContext *gb, float *dst, int dst_size, int type, float band_scale)
Definition: on2avc.c:228
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:353
FFCodec
Definition: codec_internal.h:112
On2AVCContext::band_run_end
uint8_t band_run_end[ON2AVC_MAX_BANDS]
Definition: on2avc.c:72
AV_CODEC_ID_ON2AVC
@ AV_CODEC_ID_ON2AVC
Definition: codec_id.h:492
t1
#define t1
Definition: regdef.h:29
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:354
WINDOW_TYPE_EXT7
@ WINDOW_TYPE_EXT7
Definition: on2avc.c:47
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:300
ff_on2avc_tab_84_1
const double ff_on2avc_tab_84_1[]
Definition: on2avcdata.c:2949
combine_fft
static void combine_fft(float *s0, float *s1, float *s2, float *s3, float *dst, const float *t0, const float *t1, const float *t2, const float *t3, int len, int step)
Definition: on2avc.c:416
On2AVCContext::grouping
int grouping[8]
Definition: on2avc.c:65
ff_on2avc_window_long_32000
const float ff_on2avc_window_long_32000[1024]
Definition: on2avcdata.c:2336
init
static int init
Definition: av_tx.c:47
ff_on2avc_tabs_9_20_2
const double *const ff_on2avc_tabs_9_20_2[9]
Definition: on2avcdata.c:3180
bytestream2_skip
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
On2AVCContext::wtf
void(* wtf)(struct On2AVCContext *ctx, float *out, float *in, int size)
Definition: on2avc.c:55
s3
#define s3
Definition: regdef.h:40
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:116
U
#define U(x)
Definition: vp56_arith.h:37
wtf_end_512
static void wtf_end_512(On2AVCContext *c, float *out, float *src, float *tmp0, float *tmp1)
Definition: on2avc.c:465
AVCodecContext::ch_layout
AVChannelLayout ch_layout
Audio channel layout.
Definition: avcodec.h:2056
GetBitContext
Definition: get_bits.h:61
On2AVCContext::prev_window_type
int prev_window_type
Definition: on2avc.c:60
tab
static const struct twinvq_data tab
Definition: twinvq_data.h:10345
ff_on2avc_tabs_20_84_2
const double *const ff_on2avc_tabs_20_84_2[20]
Definition: on2avcdata.c:4285
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:469
val
static double val(void *priv, double ch)
Definition: aeval.c:77
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
on2avc_reconstruct_channel_ext
static int on2avc_reconstruct_channel_ext(On2AVCContext *c, AVFrame *dst, int offset)
Definition: on2avc.c:691
scale
static av_always_inline float scale(float x, float s)
Definition: vf_v360.c:1389
On2AVCContext::fft512
FFTContext fft512
Definition: on2avc.c:54
pretwiddle
static void pretwiddle(float *src, float *dst, int dst_len, int tab_step, int step, int order0, int order1, const double *const *tabs)
Definition: on2avc.c:324
ff_on2avc_modes_44
const On2AVCMode ff_on2avc_modes_44[8]
Definition: on2avcdata.c:102
ff_on2avc_cb_elems
const int ff_on2avc_cb_elems[]
Definition: on2avcdata.c:2328
On2AVCContext::mdct_small
FFTContext mdct_small
Definition: on2avc.c:53
first
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But first
Definition: rate_distortion.txt:12
ceil
static __device__ float ceil(float a)
Definition: cuda_runtime.h:176
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
init_get_bits8
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:667
mask
static const uint16_t mask[17]
Definition: lzw.c:38
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:254
ON2AVC_SUBFRAME_SIZE
#define ON2AVC_SUBFRAME_SIZE
Definition: on2avc.c:37
frame_size
int frame_size
Definition: mxfenc.c:2201
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
s1
#define s1
Definition: regdef.h:38
On2AVCContext::band_scales
float band_scales[ON2AVC_MAX_BANDS]
Definition: on2avc.c:75
GetByteContext::buffer
const uint8_t * buffer
Definition: bytestream.h:34
ff_fft_end
#define ff_fft_end
Definition: fft.h:136
ctx
AVFormatContext * ctx
Definition: movenc.c:48
channels
channels
Definition: aptx.h:32
get_bits.h
ff_on2avc_tab_10_1
const double ff_on2avc_tab_10_1[]
Definition: on2avcdata.c:2889
ff_on2avc_tab_84_3
const double ff_on2avc_tab_84_3[]
Definition: on2avcdata.c:3011
ff_on2avc_tabs_20_84_3
const double *const ff_on2avc_tabs_20_84_3[20]
Definition: on2avcdata.c:4293
ff_on2avc_scale_diff_bits
const uint8_t ff_on2avc_scale_diff_bits[ON2AVC_SCALE_DIFFS]
Definition: on2avcdata.c:125
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
run
uint8_t run
Definition: svq3.c:205
WINDOW_TYPE_EXT6
@ WINDOW_TYPE_EXT6
Definition: on2avc.c:46
On2AVCContext::coeffs
float coeffs[2][ON2AVC_SUBFRAME_SIZE]
Definition: on2avc.c:82
ff_on2avc_tabs_20_84_4
const double *const ff_on2avc_tabs_20_84_4[20]
Definition: on2avcdata.c:4301
ff_on2avc_tabs_19_40_1
const double *const ff_on2avc_tabs_19_40_1[19]
Definition: on2avcdata.c:3378
On2AVCContext::mdct_buf
float mdct_buf[ON2AVC_SUBFRAME_SIZE]
Definition: on2avc.c:86
WINDOW_TYPE_LONG
@ WINDOW_TYPE_LONG
Definition: on2avc.c:40
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
ff_init_vlc_from_lengths
int ff_init_vlc_from_lengths(VLC *vlc, int nb_bits, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx)
Build VLC decoding tables suitable for use with get_vlc2()
Definition: vlc.c:328
ff_on2avc_tabs_20_84_1
const double *const ff_on2avc_tabs_20_84_1[20]
Definition: on2avcdata.c:4277
ff_on2avc_cb_syms
const uint16_t ff_on2avc_cb_syms[]
Definition: on2avcdata.c:858
sqrtf
static __device__ float sqrtf(float a)
Definition: cuda_runtime.h:184
ff_on2avc_ctab_4
const float ff_on2avc_ctab_4[2048]
Definition: on2avcdata.c:4702
On2AVCContext::fft256
FFTContext fft256
Definition: on2avc.c:54
abs
#define abs(x)
Definition: cuda_runtime.h:35
get_vlc2
static av_always_inline int get_vlc2(GetBitContext *s, const VLCElem *table, int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:787
ff_on2avc_tab_84_4
const double ff_on2avc_tab_84_4[]
Definition: on2avcdata.c:3042
On2AVCContext::num_sections
int num_sections
Definition: on2avc.c:73
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
On2AVCContext::modes
const On2AVCMode * modes
Definition: on2avc.c:59
ff_on2avc_scale_diff_syms
const uint8_t ff_on2avc_scale_diff_syms[ON2AVC_SCALE_DIFFS]
Definition: on2avcdata.c:113
bytestream2_get_bytes_left
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
float_dsp.h
av_channel_layout_uninit
void av_channel_layout_uninit(AVChannelLayout *channel_layout)
Free any allocated data in the channel layout and reset the channel count to 0.
Definition: channel_layout.c:630
s2
#define s2
Definition: regdef.h:39
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1403
On2AVCContext::avctx
AVCodecContext * avctx
Definition: on2avc.c:51
on2avc_decode_close
static av_cold int on2avc_decode_close(AVCodecContext *avctx)
Definition: on2avc.c:987
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
CMUL2
#define CMUL2(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it)
Definition: on2avc.c:406
CMUL1
#define CMUL1(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it)
Definition: on2avc.c:396
wtf_40
static void wtf_40(On2AVCContext *c, float *out, float *src, int size)
Definition: on2avc.c:531
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:290
codec_internal.h
On2AVCContext::is_av500
int is_av500
Definition: on2avc.c:57
CMUL0
#define CMUL0(dst, id, s0, s1, s2, s3, t0, t1, t2, t3, is, it)
Definition: on2avc.c:390
AVCodecContext::sample_fmt
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1014
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
On2AVCContext::mdct
FFTContext mdct
Definition: on2avc.c:53
size
int size
Definition: twinvq_data.h:10344
ff_mdct_end
#define ff_mdct_end
Definition: fft.h:154
On2AVCContext::num_bands
int num_bands
Definition: on2avc.c:61
AVFloatDSPContext
Definition: float_dsp.h:24
ff_on2avc_ctab_3
const float ff_on2avc_ctab_3[2048]
Definition: on2avcdata.c:4571
on2avc_decode_frame
static int on2avc_decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
Definition: on2avc.c:842
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
ON2AVC_MAX_BANDS
#define ON2AVC_MAX_BANDS
Definition: on2avcdata.h:28
ff_on2avc_tab_40_2
const double ff_on2avc_tab_40_2[]
Definition: on2avcdata.c:2932
ff_on2avc_tab_20_2
const double ff_on2avc_tab_20_2[]
Definition: on2avcdata.c:2909
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:116
on2avc_read_channel_data
static int on2avc_read_channel_data(On2AVCContext *c, GetBitContext *gb, int ch)
Definition: on2avc.c:256
FFTContext
Definition: fft.h:75
On2AVCContext::fft128
FFTContext fft128
Definition: on2avc.c:54
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
zero_head_and_tail
static void zero_head_and_tail(float *src, int len, int order0, int order1)
Definition: on2avc.c:318
t3
#define t3
Definition: regdef.h:31
On2AVCContext::band_start
const int * band_start
Definition: on2avc.c:63
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:386
src2
const pixel * src2
Definition: h264pred_template.c:422
On2AVCContext::long_win
float long_win[ON2AVC_SUBFRAME_SIZE]
Definition: on2avc.c:87
On2AVCContext::window_type
int window_type
Definition: on2avc.c:60
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: codec_internal.h:31
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:203
WindowTypes
WindowTypes
Definition: on2avc.c:39
len
int len
Definition: vorbis_enc_data.h:426
ff_free_vlc
void ff_free_vlc(VLC *vlc)
Definition: vlc.c:375
tabs
static const struct @93 tabs[]
WINDOW_TYPE_LONG_START
@ WINDOW_TYPE_LONG_START
Definition: on2avc.c:42
on2avc_read_ms_info
static void on2avc_read_ms_info(On2AVCContext *c, GetBitContext *gb)
Definition: on2avc.c:91
on2avc_free_vlcs
static av_cold void on2avc_free_vlcs(On2AVCContext *c)
Definition: on2avc.c:899
avcodec.h
on2avc_decode_band_scales
static int on2avc_decode_band_scales(On2AVCContext *c, GetBitContext *gb)
Definition: on2avc.c:142
On2AVCMode
Definition: on2avcdata.h:31
ret
ret
Definition: filter_design.txt:187
FFSWAP
#define FFSWAP(type, a, b)
Definition: macros.h:52
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
on2avc_decode_band_types
static int on2avc_decode_band_types(On2AVCContext *c, GetBitContext *gb)
Definition: on2avc.c:112
On2AVCContext::fft1024
FFTContext fft1024
Definition: on2avc.c:54
ff_on2avc_modes_40
const On2AVCMode ff_on2avc_modes_40[8]
Definition: on2avcdata.c:91
pos
unsigned int pos
Definition: spdifenc.c:412
On2AVCContext::is_long
int is_long
Definition: on2avc.c:69
On2AVCContext::bits_per_section
int bits_per_section
Definition: on2avc.c:62
ff_on2avc_tabs_9_20_1
const double *const ff_on2avc_tabs_9_20_1[9]
Definition: on2avcdata.c:3175
run_len
static const uint8_t run_len[7][16]
Definition: h264_cavlc.c:217
fft.h
AVCodecContext
main external API structure.
Definition: avcodec.h:389
on2avc_decode_subframe
static int on2avc_decode_subframe(On2AVCContext *c, const uint8_t *buf, int buf_size, AVFrame *dst, int offset)
Definition: on2avc.c:801
On2AVCContext::scale_tab
float scale_tab[128]
Definition: on2avc.c:80
channel_layout.h
t2
#define t2
Definition: regdef.h:30
VLC
Definition: vlc.h:31
On2AVCContext::scale_diff
VLC scale_diff
Definition: on2avc.c:77
ff_on2avc_tab_20_1
const double ff_on2avc_tab_20_1[]
Definition: on2avcdata.c:2902
ff_on2avc_tabs_4_10_2
const double *const ff_on2avc_tabs_4_10_2[4]
Definition: on2avcdata.c:3096
sign_extend
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:132
ff_on2avc_window_long_24000
const float ff_on2avc_window_long_24000[1024]
Definition: on2avcdata.c:2595
temp
else temp
Definition: vf_mcdeint.c:248
WINDOW_TYPE_LONG_STOP
@ WINDOW_TYPE_LONG_STOP
Definition: on2avc.c:41
ff_on2avc_tabs_4_10_1
const double *const ff_on2avc_tabs_4_10_1[4]
Definition: on2avcdata.c:3092
ffmath.h
On2AVCContext::mdct_half
FFTContext mdct_half
Definition: on2avc.c:53
ff_on2avc_ctab_1
const float ff_on2avc_ctab_1[2048]
Definition: on2avcdata.c:4309
on2avcdata.h
AV_CODEC_FLAG_BITEXACT
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:278
s0
#define s0
Definition: regdef.h:37
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
ff_on2avc_tab_10_2
const double ff_on2avc_tab_10_2[]
Definition: on2avcdata.c:2894
ff_on2avc_ctab_2
const float ff_on2avc_ctab_2[2048]
Definition: on2avcdata.c:4440
ff_on2avc_tab_40_1
const double ff_on2avc_tab_40_1[]
Definition: on2avcdata.c:2919
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:414
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:416
AVPacket
This structure stores compressed data.
Definition: packet.h:351
WINDOW_TYPE_EXT5
@ WINDOW_TYPE_EXT5
Definition: on2avc.c:45
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
wtf_end_1024
static void wtf_end_1024(On2AVCContext *c, float *out, float *src, float *tmp0, float *tmp1)
Definition: on2avc.c:498
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
avpriv_float_dsp_alloc
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
Definition: float_dsp.c:135
ff_on2avc_tab_84_2
const double ff_on2avc_tab_84_2[]
Definition: on2avcdata.c:2980
ff_on2avc_window_short
const float ff_on2avc_window_short[128]
Definition: on2avcdata.c:2854
bytestream.h
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
On2AVCContext::num_windows
int num_windows
Definition: on2avc.c:61
WINDOW_TYPE_8SHORT
@ WINDOW_TYPE_8SHORT
Definition: on2avc.c:43
On2AVCContext::band_type
uint8_t band_type[ON2AVC_MAX_BANDS]
Definition: on2avc.c:71
On2AVCContext::temp
float temp[ON2AVC_SUBFRAME_SIZE *2]
Definition: on2avc.c:85
channel
channel
Definition: ebur128.h:39
FFTComplex
Definition: avfft.h:37
On2AVCContext
Definition: on2avc.c:50
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