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Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavcodec / on2avc.c
CommitLineData
2ba45a60
DM		 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/float_dsp.h"
25#include "avcodec.h"
26#include "bytestream.h"
27#include "fft.h"
28#include "get_bits.h"
29#include "golomb.h"
30#include "internal.h"
31#include "unary.h"
32
33#include "on2avcdata.h"
34
35#define ON2AVC_SUBFRAME_SIZE 1024
36
37enum WindowTypes {
38 WINDOW_TYPE_LONG = 0,
39 WINDOW_TYPE_LONG_STOP,
40 WINDOW_TYPE_LONG_START,
41 WINDOW_TYPE_8SHORT = 3,
42 WINDOW_TYPE_EXT4,
43 WINDOW_TYPE_EXT5,
44 WINDOW_TYPE_EXT6,
45 WINDOW_TYPE_EXT7,
46};
47
48typedef struct On2AVCContext {
49 AVCodecContext *avctx;
f6fa7814 50 AVFloatDSPContext *fdsp;
2ba45a60
DM		 51 FFTContext mdct, mdct_half, mdct_small;
52 FFTContext fft128, fft256, fft512, fft1024;
53 void (*wtf)(struct On2AVCContext *ctx, float *out, float *in, int size);
54
55 int is_av500;
56
57 const On2AVCMode *modes;
58 int window_type, prev_window_type;
59 int num_windows, num_bands;
60 int bits_per_section;
61 const int *band_start;
62
63 int grouping[8];
64 int ms_present;
65 int ms_info[ON2AVC_MAX_BANDS];
66
67 int is_long;
68
69 uint8_t band_type[ON2AVC_MAX_BANDS];
70 uint8_t band_run_end[ON2AVC_MAX_BANDS];
71 int num_sections;
72
73 float band_scales[ON2AVC_MAX_BANDS];
74
75 VLC scale_diff;
76 VLC cb_vlc[16];
77
78 float scale_tab[128];
79
80 DECLARE_ALIGNED(32, float, coeffs)[2][ON2AVC_SUBFRAME_SIZE];
81 DECLARE_ALIGNED(32, float, delay) [2][ON2AVC_SUBFRAME_SIZE];
82
83 DECLARE_ALIGNED(32, float, temp) [ON2AVC_SUBFRAME_SIZE * 2];
84 DECLARE_ALIGNED(32, float, mdct_buf) [ON2AVC_SUBFRAME_SIZE];
85 DECLARE_ALIGNED(32, float, long_win) [ON2AVC_SUBFRAME_SIZE];
86 DECLARE_ALIGNED(32, float, short_win)[ON2AVC_SUBFRAME_SIZE / 8];
87} On2AVCContext;
88
89static void on2avc_read_ms_info(On2AVCContext *c, GetBitContext *gb)
90{
91 int w, b, band_off = 0;
92
93 c->ms_present = get_bits1(gb);
94 if (!c->ms_present)
95 return;
96 for (w = 0; w < c->num_windows; w++) {
97 if (!c->grouping[w]) {
98 memcpy(c->ms_info + band_off,
99 c->ms_info + band_off - c->num_bands,
100 c->num_bands * sizeof(*c->ms_info));
101 band_off += c->num_bands;
102 continue;
103 }
104 for (b = 0; b < c->num_bands; b++)
105 c->ms_info[band_off++] = get_bits1(gb);
106 }
107}
108
109// do not see Table 17 in ISO/IEC 13818-7
110static int on2avc_decode_band_types(On2AVCContext *c, GetBitContext *gb)
111{
112 int bits_per_sect = c->is_long ? 5 : 3;
113 int esc_val = (1 << bits_per_sect) - 1;
114 int num_bands = c->num_bands * c->num_windows;
115 int band = 0, i, band_type, run_len, run;
116
117 while (band < num_bands) {
118 band_type = get_bits(gb, 4);
119 run_len = 1;
120 do {
121 run = get_bits(gb, bits_per_sect);
122 run_len += run;
123 } while (run == esc_val);
124 if (band + run_len > num_bands) {
125 av_log(c->avctx, AV_LOG_ERROR, "Invalid band type run\n");
126 return AVERROR_INVALIDDATA;
127 }
128 for (i = band; i < band + run_len; i++) {
129 c->band_type[i] = band_type;
130 c->band_run_end[i] = band + run_len;
131 }
132 band += run_len;
133 }
134
135 return 0;
136}
137
138// completely not like Table 18 in ISO/IEC 13818-7
139// (no intensity stereo, different coding for the first coefficient)
140static int on2avc_decode_band_scales(On2AVCContext *c, GetBitContext *gb)
141{
142 int w, w2, b, scale, first = 1;
143 int band_off = 0;
144
145 for (w = 0; w < c->num_windows; w++) {
146 if (!c->grouping[w]) {
147 memcpy(c->band_scales + band_off,
148 c->band_scales + band_off - c->num_bands,
149 c->num_bands * sizeof(*c->band_scales));
150 band_off += c->num_bands;
151 continue;
152 }
153 for (b = 0; b < c->num_bands; b++) {
154 if (!c->band_type[band_off]) {
155 int all_zero = 1;
156 for (w2 = w + 1; w2 < c->num_windows; w2++) {
157 if (c->grouping[w2])
158 break;
159 if (c->band_type[w2 * c->num_bands + b]) {
160 all_zero = 0;
161 break;
162 }
163 }
164 if (all_zero) {
165 c->band_scales[band_off++] = 0;
166 continue;
167 }
168 }
169 if (first) {
170 scale = get_bits(gb, 7);
171 first = 0;
172 } else {
173 scale += get_vlc2(gb, c->scale_diff.table, 9, 3) - 60;
174 }
175 if (scale < 0 || scale > 127) {
176 av_log(c->avctx, AV_LOG_ERROR, "Invalid scale value %d\n",
177 scale);
178 return AVERROR_INVALIDDATA;
179 }
180 c->band_scales[band_off++] = c->scale_tab[scale];
181 }
182 }
183
184 return 0;
185}
186
187static inline float on2avc_scale(int v, float scale)
188{
189 return v * sqrtf(fabsf(v)) * scale;
190}
191
192// spectral data is coded completely differently - there are no unsigned codebooks
193static int on2avc_decode_quads(On2AVCContext *c, GetBitContext *gb, float *dst,
194 int dst_size, int type, float band_scale)
195{
196 int i, j, val, val1;
197
198 for (i = 0; i < dst_size; i += 4) {
199 val = get_vlc2(gb, c->cb_vlc[type].table, 9, 3);
200
201 for (j = 0; j < 4; j++) {
202 val1 = sign_extend((val >> (12 - j * 4)) & 0xF, 4);
203 *dst++ = on2avc_scale(val1, band_scale);
204 }
205 }
206
207 return 0;
208}
209
210static inline int get_egolomb(GetBitContext *gb)
211{
212 int v = 4;
213
214 while (get_bits1(gb)) v++;
215
216 return (1 << v) + get_bits(gb, v);
217}
218
219static int on2avc_decode_pairs(On2AVCContext *c, GetBitContext *gb, float *dst,
220 int dst_size, int type, float band_scale)
221{
222 int i, val, val1, val2, sign;
223
224 for (i = 0; i < dst_size; i += 2) {
225 val = get_vlc2(gb, c->cb_vlc[type].table, 9, 3);
226
227 val1 = sign_extend(val >> 8, 8);
228 val2 = sign_extend(val & 0xFF, 8);
229 if (type == ON2AVC_ESC_CB) {
230 if (val1 <= -16 || val1 >= 16) {
231 sign = 1 - (val1 < 0) * 2;
232 val1 = sign * get_egolomb(gb);
233 }
234 if (val2 <= -16 || val2 >= 16) {
235 sign = 1 - (val2 < 0) * 2;
236 val2 = sign * get_egolomb(gb);
237 }
238 }
239
240 *dst++ = on2avc_scale(val1, band_scale);
241 *dst++ = on2avc_scale(val2, band_scale);
242 }
243
244 return 0;
245}
246
247static int on2avc_read_channel_data(On2AVCContext *c, GetBitContext *gb, int ch)
248{
249 int ret;
250 int w, b, band_idx;
251 float *coeff_ptr;
252
253 if ((ret = on2avc_decode_band_types(c, gb)) < 0)
254 return ret;
255 if ((ret = on2avc_decode_band_scales(c, gb)) < 0)
256 return ret;
257
258 coeff_ptr = c->coeffs[ch];
259 band_idx = 0;
260 memset(coeff_ptr, 0, ON2AVC_SUBFRAME_SIZE * sizeof(*coeff_ptr));
261 for (w = 0; w < c->num_windows; w++) {
262 for (b = 0; b < c->num_bands; b++) {
263 int band_size = c->band_start[b + 1] - c->band_start[b];
264 int band_type = c->band_type[band_idx + b];
265
266 if (!band_type) {
267 coeff_ptr += band_size;
268 continue;
269 }
270 if (band_type < 9)
271 on2avc_decode_quads(c, gb, coeff_ptr, band_size, band_type,
272 c->band_scales[band_idx + b]);
273 else
274 on2avc_decode_pairs(c, gb, coeff_ptr, band_size, band_type,
275 c->band_scales[band_idx + b]);
276 coeff_ptr += band_size;
277 }
278 band_idx += c->num_bands;
279 }
280
281 return 0;
282}
283
284static int on2avc_apply_ms(On2AVCContext *c)
285{
286 int w, b, i;
287 int band_off = 0;
288 float *ch0 = c->coeffs[0];
289 float *ch1 = c->coeffs[1];
290
291 for (w = 0; w < c->num_windows; w++) {
292 for (b = 0; b < c->num_bands; b++) {
293 if (c->ms_info[band_off + b]) {
294 for (i = c->band_start[b]; i < c->band_start[b + 1]; i++) {
295 float l = *ch0, r = *ch1;
296 *ch0++ = l + r;
297 *ch1++ = l - r;
298 }
299 } else {
300 ch0 += c->band_start[b + 1] - c->band_start[b];
301 ch1 += c->band_start[b + 1] - c->band_start[b];
302 }
303 }
304 band_off += c->num_bands;
305 }
306 return 0;
307}
308
309static void zero_head_and_tail(float *src, int len, int order0, int order1)
310{
311 memset(src, 0, sizeof(*src) * order0);
312 memset(src + len - order1, 0, sizeof(*src) * order1);
313}
314
315static void pretwiddle(float *src, float *dst, int dst_len, int tab_step,
316 int step, int order0, int order1, const double * const *tabs)
317{
318 float *src2, *out;
319 const double *tab;
320 int i, j;
321
322 out = dst;
323 tab = tabs[0];
324 for (i = 0; i < tab_step; i++) {
325 double sum = 0;
326 for (j = 0; j < order0; j++)
327 sum += src[j] * tab[j * tab_step + i];
328 out[i] += sum;
329 }
330
331 out = dst + dst_len - tab_step;
332 tab = tabs[order0];
333 src2 = src + (dst_len - tab_step) / step + 1 + order0;
334 for (i = 0; i < tab_step; i++) {
335 double sum = 0;
336 for (j = 0; j < order1; j++)
337 sum += src2[j] * tab[j * tab_step + i];
338 out[i] += sum;
339 }
340}
341
342static void twiddle(float *src1, float *src2, int src2_len,
343 const double *tab, int tab_len, int step,
344 int order0, int order1, const double * const *tabs)
345{
346 int steps;
347 int mask;
348 int i, j;
349
350 steps = (src2_len - tab_len) / step + 1;
351 pretwiddle(src1, src2, src2_len, tab_len, step, order0, order1, tabs);
352 mask = tab_len - 1;
353
354 for (i = 0; i < steps; i++) {
355 float in0 = src1[order0 + i];
356 int pos = (src2_len - 1) & mask;
357
358 if (pos < tab_len) {
359 const double *t = tab;
360 for (j = pos; j >= 0; j--)
361 src2[j] += in0 * *t++;
362 for (j = 0; j < tab_len - pos - 1; j++)
363 src2[src2_len - j - 1] += in0 * tab[pos + 1 + j];
364 } else {
365 for (j = 0; j < tab_len; j++)
366 src2[pos - j] += in0 * tab[j];
367 }
368 mask = pos + step;
369 }
370}
371
372#define CMUL1_R(s, t, is, it) \
373 s[is + 0] * t[it + 0] - s[is + 1] * t[it + 1]
374#define CMUL1_I(s, t, is, it) \
375 s[is + 0] * t[it + 1] + s[is + 1] * t[it + 0]
376#define CMUL2_R(s, t, is, it) \
377 s[is + 0] * t[it + 0] + s[is + 1] * t[it + 1]
378#define CMUL2_I(s, t, is, it) \
379 s[is + 0] * t[it + 1] - s[is + 1] * t[it + 0]
380
381#define CMUL0(dst, id, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
382 dst[id] = s0[is] * t0[it] + s1[is] * t1[it] \
383 + s2[is] * t2[it] + s3[is] * t3[it]; \
384 dst[id + 1] = s0[is] * t0[it + 1] + s1[is] * t1[it + 1] \
385 + s2[is] * t2[it + 1] + s3[is] * t3[it + 1];
386
387#define CMUL1(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
388 *dst++ = CMUL1_R(s0, t0, is, it) \
389 + CMUL1_R(s1, t1, is, it) \
390 + CMUL1_R(s2, t2, is, it) \
391 + CMUL1_R(s3, t3, is, it); \
392 *dst++ = CMUL1_I(s0, t0, is, it) \
393 + CMUL1_I(s1, t1, is, it) \
394 + CMUL1_I(s2, t2, is, it) \
395 + CMUL1_I(s3, t3, is, it);
396
397#define CMUL2(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
398 *dst++ = CMUL2_R(s0, t0, is, it) \
399 + CMUL2_R(s1, t1, is, it) \
400 + CMUL2_R(s2, t2, is, it) \
401 + CMUL2_R(s3, t3, is, it); \
402 *dst++ = CMUL2_I(s0, t0, is, it) \
403 + CMUL2_I(s1, t1, is, it) \
404 + CMUL2_I(s2, t2, is, it) \
405 + CMUL2_I(s3, t3, is, it);
406
407static void combine_fft(float *s0, float *s1, float *s2, float *s3, float *dst,
408 const float *t0, const float *t1,
409 const float *t2, const float *t3, int len, int step)
410{
411 const float *h0, *h1, *h2, *h3;
412 float *d1, *d2;
413 int tmp, half;
414 int len2 = len >> 1, len4 = len >> 2;
415 int hoff;
416 int i, j, k;
417
418 tmp = step;
419 for (half = len2; tmp > 1; half <<= 1, tmp >>= 1);
420
421 h0 = t0 + half;
422 h1 = t1 + half;
423 h2 = t2 + half;
424 h3 = t3 + half;
425
426 CMUL0(dst, 0, s0, s1, s2, s3, t0, t1, t2, t3, 0, 0);
427
428 hoff = 2 * step * (len4 >> 1);
429
430 j = 2;
431 k = 2 * step;
432 d1 = dst + 2;
433 d2 = dst + 2 + (len >> 1);
434 for (i = 0; i < (len4 - 1) >> 1; i++) {
435 CMUL1(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k);
436 CMUL1(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k);
437 j += 2;
438 k += 2 * step;
439 }
440 CMUL0(dst, len4, s0, s1, s2, s3, t0, t1, t2, t3, 1, hoff);
441 CMUL0(dst, len4 + len2, s0, s1, s2, s3, h0, h1, h2, h3, 1, hoff);
442
443 j = len4;
444 k = hoff + 2 * step * len4;
445 d1 = dst + len4 + 2;
446 d2 = dst + len4 + 2 + len2;
447 for (i = 0; i < (len4 - 2) >> 1; i++) {
448 CMUL2(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k);
449 CMUL2(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k);
450 j -= 2;
451 k += 2 * step;
452 }
453 CMUL0(dst, len2 + 4, s0, s1, s2, s3, t0, t1, t2, t3, 0, k);
454}
455
456static void wtf_end_512(On2AVCContext *c, float *out, float *src,
457 float *tmp0, float *tmp1)
458{
459 memcpy(src, tmp0, 384 * sizeof(*tmp0));
460 memcpy(tmp0 + 384, src + 384, 128 * sizeof(*tmp0));
461
462 zero_head_and_tail(src, 128, 16, 4);
463 zero_head_and_tail(src + 128, 128, 16, 4);
464 zero_head_and_tail(src + 256, 128, 13, 7);
465 zero_head_and_tail(src + 384, 128, 15, 5);
466
467 c->fft128.fft_permute(&c->fft128, (FFTComplex*)src);
468 c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 128));
469 c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 256));
470 c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 384));
471 c->fft128.fft_calc(&c->fft128, (FFTComplex*)src);
472 c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 128));
473 c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 256));
474 c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 384));
475 combine_fft(src, src + 128, src + 256, src + 384, tmp1,
476 ff_on2avc_ctab_1, ff_on2avc_ctab_2,
477 ff_on2avc_ctab_3, ff_on2avc_ctab_4, 512, 2);
478 c->fft512.fft_permute(&c->fft512, (FFTComplex*)tmp1);
479 c->fft512.fft_calc(&c->fft512, (FFTComplex*)tmp1);
480
481 pretwiddle(&tmp0[ 0], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
482 pretwiddle(&tmp0[128], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
483 pretwiddle(&tmp0[256], tmp1, 512, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
484 pretwiddle(&tmp0[384], tmp1, 512, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
485
486 memcpy(src, tmp1, 512 * sizeof(float));
487}
488
489static void wtf_end_1024(On2AVCContext *c, float *out, float *src,
490 float *tmp0, float *tmp1)
491{
492 memcpy(src, tmp0, 768 * sizeof(*tmp0));
493 memcpy(tmp0 + 768, src + 768, 256 * sizeof(*tmp0));
494
495 zero_head_and_tail(src, 256, 16, 4);
496 zero_head_and_tail(src + 256, 256, 16, 4);
497 zero_head_and_tail(src + 512, 256, 13, 7);
498 zero_head_and_tail(src + 768, 256, 15, 5);
499
500 c->fft256.fft_permute(&c->fft256, (FFTComplex*)src);
501 c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 256));
502 c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 512));
503 c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 768));
504 c->fft256.fft_calc(&c->fft256, (FFTComplex*)src);
505 c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 256));
506 c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 512));
507 c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 768));
508 combine_fft(src, src + 256, src + 512, src + 768, tmp1,
509 ff_on2avc_ctab_1, ff_on2avc_ctab_2,
510 ff_on2avc_ctab_3, ff_on2avc_ctab_4, 1024, 1);
511 c->fft1024.fft_permute(&c->fft1024, (FFTComplex*)tmp1);
512 c->fft1024.fft_calc(&c->fft1024, (FFTComplex*)tmp1);
513
514 pretwiddle(&tmp0[ 0], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
515 pretwiddle(&tmp0[256], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
516 pretwiddle(&tmp0[512], tmp1, 1024, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
517 pretwiddle(&tmp0[768], tmp1, 1024, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
518
519 memcpy(src, tmp1, 1024 * sizeof(float));
520}
521
522static void wtf_40(On2AVCContext *c, float *out, float *src, int size)
523{
524 float *tmp0 = c->temp, *tmp1 = c->temp + 1024;
525
526 memset(tmp0, 0, sizeof(*tmp0) * 1024);
527 memset(tmp1, 0, sizeof(*tmp1) * 1024);
528
529 if (size == 512) {
530 twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
531 twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
532 twiddle(src + 16, &tmp0[ 16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
533 twiddle(src + 24, &tmp0[ 16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
534 twiddle(src + 32, &tmp0[ 32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
535 twiddle(src + 40, &tmp0[ 32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
536 twiddle(src + 48, &tmp0[ 48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
537 twiddle(src + 56, &tmp0[ 48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
538 twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
539 twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
540 twiddle(&tmp0[32], &tmp1[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
541 twiddle(&tmp0[48], &tmp1[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
542 twiddle(src + 64, &tmp1[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
543 twiddle(src + 80, &tmp1[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
544 twiddle(src + 96, &tmp1[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
545 twiddle(src + 112, &tmp1[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
546 twiddle(src + 128, &tmp1[128], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
547 twiddle(src + 144, &tmp1[128], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
548 twiddle(src + 160, &tmp1[160], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
549 twiddle(src + 176, &tmp1[160], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
550
551 memset(tmp0, 0, 64 * sizeof(*tmp0));
552
553 twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
554 twiddle(&tmp1[ 32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
555 twiddle(&tmp1[ 64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
556 twiddle(&tmp1[ 96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
557 twiddle(&tmp1[128], &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
558 twiddle(&tmp1[160], &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
559 twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
560 twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
561 twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
562 twiddle(src + 288, &tmp0[256], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
563 twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
564 twiddle(src + 352, &tmp0[256], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
565
566 wtf_end_512(c, out, src, tmp0, tmp1);
567 } else {
568 twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
569 twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
570 twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
571 twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
572 twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
573 twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
574 twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
575 twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
576 twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
577 twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
578 twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
579 twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
580 twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
581 twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
582 twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
583 twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
584 twiddle(src + 256, &tmp1[256], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
585 twiddle(src + 288, &tmp1[256], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
586 twiddle(src + 320, &tmp1[320], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
587 twiddle(src + 352, &tmp1[320], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
588
589 memset(tmp0, 0, 128 * sizeof(*tmp0));
590
591 twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
592 twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
593 twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
594 twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
595 twiddle(&tmp1[256], &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
596 twiddle(&tmp1[320], &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
597 twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
598 twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
599 twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
600 twiddle(src + 576, &tmp0[512], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
601 twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
602 twiddle(src + 704, &tmp0[512], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
603
604 wtf_end_1024(c, out, src, tmp0, tmp1);
605 }
606}
607
608static void wtf_44(On2AVCContext *c, float *out, float *src, int size)
609{
610 float *tmp0 = c->temp, *tmp1 = c->temp + 1024;
611
612 memset(tmp0, 0, sizeof(*tmp0) * 1024);
613 memset(tmp1, 0, sizeof(*tmp1) * 1024);
614
615 if (size == 512) {
616 twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
617 twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
618 twiddle(src + 16, &tmp0[16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
619 twiddle(src + 24, &tmp0[16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
620 twiddle(src + 32, &tmp0[32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
621 twiddle(src + 40, &tmp0[32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
622 twiddle(src + 48, &tmp0[48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
623 twiddle(src + 56, &tmp0[48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
624 twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
625 twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
626 twiddle(&tmp0[32], &tmp1[32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
627 twiddle(&tmp0[48], &tmp1[32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
628 twiddle(src + 64, &tmp1[64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
629 twiddle(src + 80, &tmp1[64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
630 twiddle(src + 96, &tmp1[96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
631 twiddle(src + 112, &tmp1[96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
632
633 memset(tmp0, 0, 64 * sizeof(*tmp0));
634
635 twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
636 twiddle(&tmp1[32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
637 twiddle(&tmp1[64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
638 twiddle(&tmp1[96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
639 twiddle(src + 128, &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
640 twiddle(src + 160, &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
641 twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
642 twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
643 twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
644 twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
645
646 wtf_end_512(c, out, src, tmp0, tmp1);
647 } else {
648 twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
649 twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
650 twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
651 twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
652 twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
653 twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
654 twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
655 twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
656 twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
657 twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
658 twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
659 twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
660 twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
661 twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
662 twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
663 twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
664
665 memset(tmp0, 0, 128 * sizeof(*tmp0));
666
667 twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
668 twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
669 twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
670 twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
671 twiddle(src + 256, &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
672 twiddle(src + 320, &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
673 twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
674 twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
675 twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
676 twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
677
678 wtf_end_1024(c, out, src, tmp0, tmp1);
679 }
680}
681
682static int on2avc_reconstruct_stereo(On2AVCContext *c, AVFrame *dst, int offset)
683{
684 int ch, i;
685
686 for (ch = 0; ch < 2; ch++) {
687 float *out = (float*)dst->extended_data[ch] + offset;
688 float *in = c->coeffs[ch];
689 float *saved = c->delay[ch];
690 float *buf = c->mdct_buf;
691 float *wout = out + 448;
692
693 switch (c->window_type) {
694 case WINDOW_TYPE_EXT7:
695 c->mdct.imdct_half(&c->mdct, buf, in);
696 break;
697 case WINDOW_TYPE_EXT4:
698 c->wtf(c, buf, in, 1024);
699 break;
700 case WINDOW_TYPE_EXT5:
701 c->wtf(c, buf, in, 512);
702 c->mdct.imdct_half(&c->mdct_half, buf + 512, in + 512);
703 for (i = 0; i < 256; i++) {
704 FFSWAP(float, buf[i + 512], buf[1023 - i]);
705 }
706 break;
707 case WINDOW_TYPE_EXT6:
708 c->mdct.imdct_half(&c->mdct_half, buf, in);
709 for (i = 0; i < 256; i++) {
710 FFSWAP(float, buf[i], buf[511 - i]);
711 }
712 c->wtf(c, buf + 512, in + 512, 512);
713 break;
714 }
715
716 memcpy(out, saved, 448 * sizeof(float));
f6fa7814 717 c->fdsp->vector_fmul_window(wout, saved + 448, buf, c->short_win, 64);
2ba45a60
DM		 718 memcpy(wout + 128, buf + 64, 448 * sizeof(float));
719 memcpy(saved, buf + 512, 448 * sizeof(float));
720 memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
721 }
722
723 return 0;
724}
725
726// not borrowed from aacdec.c - the codec has original design after all
727static int on2avc_reconstruct_channel(On2AVCContext *c, int channel,
728 AVFrame *dst, int offset)
729{
730 int i;
731 float *out = (float*)dst->extended_data[channel] + offset;
732 float *in = c->coeffs[channel];
733 float *saved = c->delay[channel];
734 float *buf = c->mdct_buf;
735 float *temp = c->temp;
736
737 switch (c->window_type) {
738 case WINDOW_TYPE_LONG_START:
739 case WINDOW_TYPE_LONG_STOP:
740 case WINDOW_TYPE_LONG:
741 c->mdct.imdct_half(&c->mdct, buf, in);
742 break;
743 case WINDOW_TYPE_8SHORT:
744 for (i = 0; i < ON2AVC_SUBFRAME_SIZE; i += ON2AVC_SUBFRAME_SIZE / 8)
745 c->mdct_small.imdct_half(&c->mdct_small, buf + i, in + i);
746 break;
747 }
748
749 if ((c->prev_window_type == WINDOW_TYPE_LONG ||
750 c->prev_window_type == WINDOW_TYPE_LONG_STOP) &&
751 (c->window_type == WINDOW_TYPE_LONG ||
752 c->window_type == WINDOW_TYPE_LONG_START)) {
f6fa7814 753 c->fdsp->vector_fmul_window(out, saved, buf, c->long_win, 512);
2ba45a60
DM		 754 } else {
755 float *wout = out + 448;
756 memcpy(out, saved, 448 * sizeof(float));
757
758 if (c->window_type == WINDOW_TYPE_8SHORT) {
f6fa7814
DM		 759 c->fdsp->vector_fmul_window(wout + 0*128, saved + 448, buf + 0*128, c->short_win, 64);
760 c->fdsp->vector_fmul_window(wout + 1*128, buf + 0*128 + 64, buf + 1*128, c->short_win, 64);
761 c->fdsp->vector_fmul_window(wout + 2*128, buf + 1*128 + 64, buf + 2*128, c->short_win, 64);
762 c->fdsp->vector_fmul_window(wout + 3*128, buf + 2*128 + 64, buf + 3*128, c->short_win, 64);
763 c->fdsp->vector_fmul_window(temp, buf + 3*128 + 64, buf + 4*128, c->short_win, 64);
2ba45a60
DM		 764 memcpy(wout + 4*128, temp, 64 * sizeof(float));
765 } else {
f6fa7814 766 c->fdsp->vector_fmul_window(wout, saved + 448, buf, c->short_win, 64);
2ba45a60
DM		 767 memcpy(wout + 128, buf + 64, 448 * sizeof(float));
768 }
769 }
770
771 // buffer update
772 switch (c->window_type) {
773 case WINDOW_TYPE_8SHORT:
774 memcpy(saved, temp + 64, 64 * sizeof(float));
f6fa7814
DM		 775 c->fdsp->vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, c->short_win, 64);
776 c->fdsp->vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, c->short_win, 64);
777 c->fdsp->vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, c->short_win, 64);
2ba45a60
DM		 778 memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
779 break;
780 case WINDOW_TYPE_LONG_START:
781 memcpy(saved, buf + 512, 448 * sizeof(float));
782 memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
783 break;
784 case WINDOW_TYPE_LONG_STOP:
785 case WINDOW_TYPE_LONG:
786 memcpy(saved, buf + 512, 512 * sizeof(float));
787 break;
788 }
789 return 0;
790}
791
792static int on2avc_decode_subframe(On2AVCContext *c, const uint8_t *buf,
793 int buf_size, AVFrame *dst, int offset)
794{
795 GetBitContext gb;
796 int i, ret;
797
798 init_get_bits(&gb, buf, buf_size * 8);
799 if (get_bits1(&gb)) {
800 av_log(c->avctx, AV_LOG_ERROR, "enh bit set\n");
801 return AVERROR_INVALIDDATA;
802 }
803 c->prev_window_type = c->window_type;
804 c->window_type = get_bits(&gb, 3);
805 if (c->window_type >= WINDOW_TYPE_EXT4 && c->avctx->channels == 1) {
806 av_log(c->avctx, AV_LOG_ERROR, "stereo mode window for mono audio\n");
807 return AVERROR_INVALIDDATA;
808 }
809
810 c->band_start = c->modes[c->window_type].band_start;
811 c->num_windows = c->modes[c->window_type].num_windows;
812 c->num_bands = c->modes[c->window_type].num_bands;
813 c->is_long = (c->window_type != WINDOW_TYPE_8SHORT);
814
815 c->grouping[0] = 1;
816 for (i = 1; i < c->num_windows; i++)
817 c->grouping[i] = !get_bits1(&gb);
818
819 on2avc_read_ms_info(c, &gb);
820 for (i = 0; i < c->avctx->channels; i++)
821 if ((ret = on2avc_read_channel_data(c, &gb, i)) < 0)
822 return AVERROR_INVALIDDATA;
823 if (c->avctx->channels == 2 && c->ms_present)
824 on2avc_apply_ms(c);
825 if (c->window_type < WINDOW_TYPE_EXT4) {
826 for (i = 0; i < c->avctx->channels; i++)
827 on2avc_reconstruct_channel(c, i, dst, offset);
828 } else {
829 on2avc_reconstruct_stereo(c, dst, offset);
830 }
831
832 return 0;
833}
834
835static int on2avc_decode_frame(AVCodecContext * avctx, void *data,
836 int *got_frame_ptr, AVPacket *avpkt)
837{
838 AVFrame *frame = data;
839 const uint8_t *buf = avpkt->data;
840 int buf_size = avpkt->size;
841 On2AVCContext *c = avctx->priv_data;
842 GetByteContext gb;
843 int num_frames = 0, frame_size, audio_off;
844 int ret;
845
846 if (c->is_av500) {
847 /* get output buffer */
848 frame->nb_samples = ON2AVC_SUBFRAME_SIZE;
849 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
850 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
851 return ret;
852 }
853
854 if ((ret = on2avc_decode_subframe(c, buf, buf_size, frame, 0)) < 0)
855 return ret;
856 } else {
857 bytestream2_init(&gb, buf, buf_size);
858 while (bytestream2_get_bytes_left(&gb) > 2) {
859 frame_size = bytestream2_get_le16(&gb);
860 if (!frame_size || frame_size > bytestream2_get_bytes_left(&gb)) {
861 av_log(avctx, AV_LOG_ERROR, "Invalid subframe size %d\n",
862 frame_size);
863 return AVERROR_INVALIDDATA;
864 }
865 num_frames++;
866 bytestream2_skip(&gb, frame_size);
867 }
868 if (!num_frames) {
869 av_log(avctx, AV_LOG_ERROR, "No subframes present\n");
870 return AVERROR_INVALIDDATA;
871 }
872
873 /* get output buffer */
874 frame->nb_samples = ON2AVC_SUBFRAME_SIZE * num_frames;
875 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
876 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
877 return ret;
878 }
879
880 audio_off = 0;
881 bytestream2_init(&gb, buf, buf_size);
882 while (bytestream2_get_bytes_left(&gb) > 2) {
883 frame_size = bytestream2_get_le16(&gb);
884 if ((ret = on2avc_decode_subframe(c, gb.buffer, frame_size,
885 frame, audio_off)) < 0)
886 return ret;
887 audio_off += ON2AVC_SUBFRAME_SIZE;
888 bytestream2_skip(&gb, frame_size);
889 }
890 }
891
892 *got_frame_ptr = 1;
893
894 return buf_size;
895}
896
897static av_cold void on2avc_free_vlcs(On2AVCContext *c)
898{
899 int i;
900
901 ff_free_vlc(&c->scale_diff);
902 for (i = 1; i < 16; i++)
903 ff_free_vlc(&c->cb_vlc[i]);
904}
905
906static av_cold int on2avc_decode_init(AVCodecContext *avctx)
907{
908 On2AVCContext *c = avctx->priv_data;
909 int i;
910
911 if (avctx->channels > 2U) {
912 avpriv_request_sample(avctx, "Decoding more than 2 channels");
913 return AVERROR_PATCHWELCOME;
914 }
915
916 c->avctx = avctx;
917 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
918 avctx->channel_layout = (avctx->channels == 2) ? AV_CH_LAYOUT_STEREO
919 : AV_CH_LAYOUT_MONO;
920
921 c->is_av500 = (avctx->codec_tag == 0x500);
922 if (c->is_av500 && avctx->channels == 2) {
923 av_log(avctx, AV_LOG_ERROR, "0x500 version should be mono\n");
924 return AVERROR_INVALIDDATA;
925 }
926 if (avctx->channels == 2)
927 av_log(avctx, AV_LOG_WARNING,
928 "Stereo mode support is not good, patch is welcome\n");
929
930 for (i = 0; i < 20; i++)
931 c->scale_tab[i] = ceil(pow(10.0, i * 0.1) * 16) / 32;
932 for (; i < 128; i++)
933 c->scale_tab[i] = ceil(pow(10.0, i * 0.1) * 0.5);
934
935 if (avctx->sample_rate < 32000 || avctx->channels == 1)
936 memcpy(c->long_win, ff_on2avc_window_long_24000,
937 1024 * sizeof(*c->long_win));
938 else
939 memcpy(c->long_win, ff_on2avc_window_long_32000,
940 1024 * sizeof(*c->long_win));
941 memcpy(c->short_win, ff_on2avc_window_short, 128 * sizeof(*c->short_win));
942
943 c->modes = (avctx->sample_rate <= 40000) ? ff_on2avc_modes_40
944 : ff_on2avc_modes_44;
945 c->wtf = (avctx->sample_rate <= 40000) ? wtf_40
946 : wtf_44;
947
948 ff_mdct_init(&c->mdct, 11, 1, 1.0 / (32768.0 * 1024.0));
949 ff_mdct_init(&c->mdct_half, 10, 1, 1.0 / (32768.0 * 512.0));
950 ff_mdct_init(&c->mdct_small, 8, 1, 1.0 / (32768.0 * 128.0));
951 ff_fft_init(&c->fft128, 6, 0);
952 ff_fft_init(&c->fft256, 7, 0);
953 ff_fft_init(&c->fft512, 8, 1);
954 ff_fft_init(&c->fft1024, 9, 1);
f6fa7814
DM		 955 c->fdsp = avpriv_float_dsp_alloc(avctx->flags & CODEC_FLAG_BITEXACT);
956 if (!c->fdsp)
957 return AVERROR(ENOMEM);
2ba45a60
DM		 958
959 if (init_vlc(&c->scale_diff, 9, ON2AVC_SCALE_DIFFS,
960 ff_on2avc_scale_diff_bits, 1, 1,
961 ff_on2avc_scale_diff_codes, 4, 4, 0)) {
f6fa7814 962 goto vlc_fail;
2ba45a60
DM		 963 }
964 for (i = 1; i < 9; i++) {
965 int idx = i - 1;
966 if (ff_init_vlc_sparse(&c->cb_vlc[i], 9, ff_on2avc_quad_cb_elems[idx],
967 ff_on2avc_quad_cb_bits[idx], 1, 1,
968 ff_on2avc_quad_cb_codes[idx], 4, 4,
969 ff_on2avc_quad_cb_syms[idx], 2, 2, 0)) {
f6fa7814 970 goto vlc_fail;
2ba45a60
DM		 971 }
972 }
973 for (i = 9; i < 16; i++) {
974 int idx = i - 9;
975 if (ff_init_vlc_sparse(&c->cb_vlc[i], 9, ff_on2avc_pair_cb_elems[idx],
976 ff_on2avc_pair_cb_bits[idx], 1, 1,
977 ff_on2avc_pair_cb_codes[idx], 2, 2,
978 ff_on2avc_pair_cb_syms[idx], 2, 2, 0)) {
f6fa7814 979 goto vlc_fail;
2ba45a60
DM		 980 }
981 }
982
983 return 0;
f6fa7814
DM		 984vlc_fail:
985 av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n");
986 on2avc_free_vlcs(c);
987 av_freep(&c->fdsp);
988 return AVERROR(ENOMEM);
2ba45a60
DM		 989}
990
991static av_cold int on2avc_decode_close(AVCodecContext *avctx)
992{
993 On2AVCContext *c = avctx->priv_data;
994
995 ff_mdct_end(&c->mdct);
996 ff_mdct_end(&c->mdct_half);
997 ff_mdct_end(&c->mdct_small);
998 ff_fft_end(&c->fft128);
999 ff_fft_end(&c->fft256);
1000 ff_fft_end(&c->fft512);
1001 ff_fft_end(&c->fft1024);
1002
f6fa7814
DM		 1003 av_freep(&c->fdsp);
1004
2ba45a60
DM		 1005 on2avc_free_vlcs(c);
1006
1007 return 0;
1008}
1009
1010
1011AVCodec ff_on2avc_decoder = {
1012 .name = "on2avc",
1013 .long_name = NULL_IF_CONFIG_SMALL("On2 Audio for Video Codec"),
1014 .type = AVMEDIA_TYPE_AUDIO,
1015 .id = AV_CODEC_ID_ON2AVC,
1016 .priv_data_size = sizeof(On2AVCContext),
1017 .init = on2avc_decode_init,
1018 .decode = on2avc_decode_frame,
1019 .close = on2avc_decode_close,
1020 .capabilities = CODEC_CAP_DR1,
1021 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1022 AV_SAMPLE_FMT_NONE },
1023};
ffmpeg Piment Noir Debian package repository