FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/on2avc.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 197 587 33.6%
Branches: 82 204 40.2%

Line Branch Exec Source
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 "fft.h"
31 #include "get_bits.h"
32 #include "internal.h"
33
34 #include "on2avcdata.h"
35
36 #define ON2AVC_SUBFRAME_SIZE 1024
37
38 enum WindowTypes {
39 WINDOW_TYPE_LONG = 0,
40 WINDOW_TYPE_LONG_STOP,
41 WINDOW_TYPE_LONG_START,
42 WINDOW_TYPE_8SHORT = 3,
43 WINDOW_TYPE_EXT4,
44 WINDOW_TYPE_EXT5,
45 WINDOW_TYPE_EXT6,
46 WINDOW_TYPE_EXT7,
47 };
48
49 typedef struct On2AVCContext {
50 AVCodecContext *avctx;
51 AVFloatDSPContext *fdsp;
52 FFTContext mdct, mdct_half, mdct_small;
53 FFTContext fft128, fft256, fft512, fft1024;
54 void (*wtf)(struct On2AVCContext *ctx, float *out, float *in, int size);
55
56 int is_av500;
57
58 const On2AVCMode *modes;
59 int window_type, prev_window_type;
60 int num_windows, num_bands;
61 int bits_per_section;
62 const int *band_start;
63
64 int grouping[8];
65 int ms_present;
66 int ms_info[ON2AVC_MAX_BANDS];
67
68 int is_long;
69
70 uint8_t band_type[ON2AVC_MAX_BANDS];
71 uint8_t band_run_end[ON2AVC_MAX_BANDS];
72 int num_sections;
73
74 float band_scales[ON2AVC_MAX_BANDS];
75
76 VLC scale_diff;
77 VLC cb_vlc[16];
78
79 float scale_tab[128];
80
81 DECLARE_ALIGNED(32, float, coeffs)[2][ON2AVC_SUBFRAME_SIZE];
82 DECLARE_ALIGNED(32, float, delay) [2][ON2AVC_SUBFRAME_SIZE];
83
84 DECLARE_ALIGNED(32, float, temp) [ON2AVC_SUBFRAME_SIZE * 2];
85 DECLARE_ALIGNED(32, float, mdct_buf) [ON2AVC_SUBFRAME_SIZE];
86 DECLARE_ALIGNED(32, float, long_win) [ON2AVC_SUBFRAME_SIZE];
87 DECLARE_ALIGNED(32, float, short_win)[ON2AVC_SUBFRAME_SIZE / 8];
88 } On2AVCContext;
89
90 30 static void on2avc_read_ms_info(On2AVCContext *c, GetBitContext *gb)
91 {
92 30 int w, b, band_off = 0;
93
94 30 c->ms_present = get_bits1(gb);
95
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30 if (!c->ms_present)
96 30 return;
97 for (w = 0; w < c->num_windows; w++) {
98 if (!c->grouping[w]) {
99 memcpy(c->ms_info + band_off,
100 c->ms_info + band_off - c->num_bands,
101 c->num_bands * sizeof(*c->ms_info));
102 band_off += c->num_bands;
103 continue;
104 }
105 for (b = 0; b < c->num_bands; b++)
106 c->ms_info[band_off++] = get_bits1(gb);
107 }
108 }
109
110 // do not see Table 17 in ISO/IEC 13818-7
111 30 static int on2avc_decode_band_types(On2AVCContext *c, GetBitContext *gb)
112 {
113
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30 int bits_per_sect = c->is_long ? 5 : 3;
114 30 int esc_val = (1 << bits_per_sect) - 1;
115 30 int num_bands = c->num_bands * c->num_windows;
116 30 int band = 0, i, band_type, run_len, run;
117
118
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255 while (band < num_bands) {
119 225 band_type = get_bits(gb, 4);
120 225 run_len = 1;
121 do {
122 225 run = get_bits(gb, bits_per_sect);
123
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225 if (run > num_bands - band - run_len) {
124 av_log(c->avctx, AV_LOG_ERROR, "Invalid band type run\n");
125 return AVERROR_INVALIDDATA;
126 }
127 225 run_len += run;
128
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225 } while (run == esc_val);
129
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1695 for (i = band; i < band + run_len; i++) {
130 1470 c->band_type[i] = band_type;
131 1470 c->band_run_end[i] = band + run_len;
132 }
133 225 band += run_len;
134 }
135
136 30 return 0;
137 }
138
139 // completely not like Table 18 in ISO/IEC 13818-7
140 // (no intensity stereo, different coding for the first coefficient)
141 30 static int on2avc_decode_band_scales(On2AVCContext *c, GetBitContext *gb)
142 {
143 30 int w, w2, b, scale, first = 1;
144 30 int band_off = 0;
145
146
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60 for (w = 0; w < c->num_windows; w++) {
147
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30 if (!c->grouping[w]) {
148 memcpy(c->band_scales + band_off,
149 c->band_scales + band_off - c->num_bands,
150 c->num_bands * sizeof(*c->band_scales));
151 band_off += c->num_bands;
152 continue;
153 }
154
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1500 for (b = 0; b < c->num_bands; b++) {
155
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1470 if (!c->band_type[band_off]) {
156 211 int all_zero = 1;
157
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211 for (w2 = w + 1; w2 < c->num_windows; w2++) {
158 if (c->grouping[w2])
159 break;
160 if (c->band_type[w2 * c->num_bands + b]) {
161 all_zero = 0;
162 break;
163 }
164 }
165
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211 if (all_zero) {
166 211 c->band_scales[band_off++] = 0;
167 211 continue;
168 }
169 }
170
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1259 if (first) {
171 30 scale = get_bits(gb, 7);
172 30 first = 0;
173 } else {
174 1229 scale += get_vlc2(gb, c->scale_diff.table, 9, 3);
175 }
176
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1259 if (scale < 0 || scale > 127) {
177 av_log(c->avctx, AV_LOG_ERROR, "Invalid scale value %d\n",
178 scale);
179 return AVERROR_INVALIDDATA;
180 }
181 1259 c->band_scales[band_off++] = c->scale_tab[scale];
182 }
183 }
184
185 30 return 0;
186 }
187
188 20628 static inline float on2avc_scale(int v, float scale)
189 {
190 20628 return v * sqrtf(abs(v)) * scale;
191 }
192
193 // spectral data is coded completely differently - there are no unsigned codebooks
194 1249 static int on2avc_decode_quads(On2AVCContext *c, GetBitContext *gb, float *dst,
195 int dst_size, int type, float band_scale)
196 {
197 int i, j, val, val1;
198
199
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6396 for (i = 0; i < dst_size; i += 4) {
200 5147 val = get_vlc2(gb, c->cb_vlc[type].table, 9, 2);
201
202
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25735 for (j = 0; j < 4; j++) {
203 20588 val1 = sign_extend((val >> (12 - j * 4)) & 0xF, 4);
204 20588 *dst++ = on2avc_scale(val1, band_scale);
205 }
206 }
207
208 1249 return 0;
209 }
210
211 2 static inline int get_egolomb(GetBitContext *gb)
212 {
213 2 int v = 4;
214
215
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3 while (get_bits1(gb)) {
216 1 v++;
217
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1 if (v > 30) {
218 av_log(NULL, AV_LOG_WARNING, "Too large golomb code in get_egolomb.\n");
219 v = 30;
220 break;
221 }
222 }
223
224 2 return (1 << v) + get_bits_long(gb, v);
225 }
226
227 10 static int on2avc_decode_pairs(On2AVCContext *c, GetBitContext *gb, float *dst,
228 int dst_size, int type, float band_scale)
229 {
230 int i, val, val1, val2, sign;
231
232
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30 for (i = 0; i < dst_size; i += 2) {
233 20 val = get_vlc2(gb, c->cb_vlc[type].table, 9, 2);
234
235 20 val1 = sign_extend(val >> 8, 8);
236 20 val2 = sign_extend(val & 0xFF, 8);
237
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20 if (type == ON2AVC_ESC_CB) {
238
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6 if (val1 <= -16 || val1 >= 16) {
239 1 sign = 1 - (val1 < 0) * 2;
240 1 val1 = sign * get_egolomb(gb);
241 }
242
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6 if (val2 <= -16 || val2 >= 16) {
243 1 sign = 1 - (val2 < 0) * 2;
244 1 val2 = sign * get_egolomb(gb);
245 }
246 }
247
248 20 *dst++ = on2avc_scale(val1, band_scale);
249 20 *dst++ = on2avc_scale(val2, band_scale);
250 }
251
252 10 return 0;
253 }
254
255 30 static int on2avc_read_channel_data(On2AVCContext *c, GetBitContext *gb, int ch)
256 {
257 int ret;
258 int w, b, band_idx;
259 float *coeff_ptr;
260
261
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30 if ((ret = on2avc_decode_band_types(c, gb)) < 0)
262 return ret;
263
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30 if ((ret = on2avc_decode_band_scales(c, gb)) < 0)
264 return ret;
265
266 30 coeff_ptr = c->coeffs[ch];
267 30 band_idx = 0;
268 30 memset(coeff_ptr, 0, ON2AVC_SUBFRAME_SIZE * sizeof(*coeff_ptr));
269
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60 for (w = 0; w < c->num_windows; w++) {
270
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1500 for (b = 0; b < c->num_bands; b++) {
271 1470 int band_size = c->band_start[b + 1] - c->band_start[b];
272 1470 int band_type = c->band_type[band_idx + b];
273
274
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1470 if (!band_type) {
275 211 coeff_ptr += band_size;
276 211 continue;
277 }
278
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1259 if (band_type < 9)
279 1249 on2avc_decode_quads(c, gb, coeff_ptr, band_size, band_type,
280 1249 c->band_scales[band_idx + b]);
281 else
282 10 on2avc_decode_pairs(c, gb, coeff_ptr, band_size, band_type,
283 10 c->band_scales[band_idx + b]);
284 1259 coeff_ptr += band_size;
285 }
286 30 band_idx += c->num_bands;
287 }
288
289 30 return 0;
290 }
291
292 static int on2avc_apply_ms(On2AVCContext *c)
293 {
294 int w, b, i;
295 int band_off = 0;
296 float *ch0 = c->coeffs[0];
297 float *ch1 = c->coeffs[1];
298
299 for (w = 0; w < c->num_windows; w++) {
300 for (b = 0; b < c->num_bands; b++) {
301 if (c->ms_info[band_off + b]) {
302 for (i = c->band_start[b]; i < c->band_start[b + 1]; i++) {
303 float l = *ch0, r = *ch1;
304 *ch0++ = l + r;
305 *ch1++ = l - r;
306 }
307 } else {
308 ch0 += c->band_start[b + 1] - c->band_start[b];
309 ch1 += c->band_start[b + 1] - c->band_start[b];
310 }
311 }
312 band_off += c->num_bands;
313 }
314 return 0;
315 }
316
317 static void zero_head_and_tail(float *src, int len, int order0, int order1)
318 {
319 memset(src, 0, sizeof(*src) * order0);
320 memset(src + len - order1, 0, sizeof(*src) * order1);
321 }
322
323 static void pretwiddle(float *src, float *dst, int dst_len, int tab_step,
324 int step, int order0, int order1, const double * const *tabs)
325 {
326 float *src2, *out;
327 const double *tab;
328 int i, j;
329
330 out = dst;
331 tab = tabs[0];
332 for (i = 0; i < tab_step; i++) {
333 double sum = 0;
334 for (j = 0; j < order0; j++)
335 sum += src[j] * tab[j * tab_step + i];
336 out[i] += sum;
337 }
338
339 out = dst + dst_len - tab_step;
340 tab = tabs[order0];
341 src2 = src + (dst_len - tab_step) / step + 1 + order0;
342 for (i = 0; i < tab_step; i++) {
343 double sum = 0;
344 for (j = 0; j < order1; j++)
345 sum += src2[j] * tab[j * tab_step + i];
346 out[i] += sum;
347 }
348 }
349
350 static void twiddle(float *src1, float *src2, int src2_len,
351 const double *tab, int tab_len, int step,
352 int order0, int order1, const double * const *tabs)
353 {
354 int steps;
355 int mask;
356 int i, j;
357
358 steps = (src2_len - tab_len) / step + 1;
359 pretwiddle(src1, src2, src2_len, tab_len, step, order0, order1, tabs);
360 mask = tab_len - 1;
361
362 for (i = 0; i < steps; i++) {
363 float in0 = src1[order0 + i];
364 int pos = (src2_len - 1) & mask;
365
366 if (pos < tab_len) {
367 const double *t = tab;
368 for (j = pos; j >= 0; j--)
369 src2[j] += in0 * *t++;
370 for (j = 0; j < tab_len - pos - 1; j++)
371 src2[src2_len - j - 1] += in0 * tab[pos + 1 + j];
372 } else {
373 for (j = 0; j < tab_len; j++)
374 src2[pos - j] += in0 * tab[j];
375 }
376 mask = pos + step;
377 }
378 }
379
380 #define CMUL1_R(s, t, is, it) \
381 s[is + 0] * t[it + 0] - s[is + 1] * t[it + 1]
382 #define CMUL1_I(s, t, is, it) \
383 s[is + 0] * t[it + 1] + s[is + 1] * t[it + 0]
384 #define CMUL2_R(s, t, is, it) \
385 s[is + 0] * t[it + 0] + s[is + 1] * t[it + 1]
386 #define CMUL2_I(s, t, is, it) \
387 s[is + 0] * t[it + 1] - s[is + 1] * t[it + 0]
388
389 #define CMUL0(dst, id, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
390 dst[id] = s0[is] * t0[it] + s1[is] * t1[it] \
391 + s2[is] * t2[it] + s3[is] * t3[it]; \
392 dst[id + 1] = s0[is] * t0[it + 1] + s1[is] * t1[it + 1] \
393 + s2[is] * t2[it + 1] + s3[is] * t3[it + 1];
394
395 #define CMUL1(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
396 *dst++ = CMUL1_R(s0, t0, is, it) \
397 + CMUL1_R(s1, t1, is, it) \
398 + CMUL1_R(s2, t2, is, it) \
399 + CMUL1_R(s3, t3, is, it); \
400 *dst++ = CMUL1_I(s0, t0, is, it) \
401 + CMUL1_I(s1, t1, is, it) \
402 + CMUL1_I(s2, t2, is, it) \
403 + CMUL1_I(s3, t3, is, it);
404
405 #define CMUL2(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
406 *dst++ = CMUL2_R(s0, t0, is, it) \
407 + CMUL2_R(s1, t1, is, it) \
408 + CMUL2_R(s2, t2, is, it) \
409 + CMUL2_R(s3, t3, is, it); \
410 *dst++ = CMUL2_I(s0, t0, is, it) \
411 + CMUL2_I(s1, t1, is, it) \
412 + CMUL2_I(s2, t2, is, it) \
413 + CMUL2_I(s3, t3, is, it);
414
415 static void combine_fft(float *s0, float *s1, float *s2, float *s3, float *dst,
416 const float *t0, const float *t1,
417 const float *t2, const float *t3, int len, int step)
418 {
419 const float *h0, *h1, *h2, *h3;
420 float *d1, *d2;
421 int tmp, half;
422 int len2 = len >> 1, len4 = len >> 2;
423 int hoff;
424 int i, j, k;
425
426 tmp = step;
427 for (half = len2; tmp > 1; half <<= 1, tmp >>= 1);
428
429 h0 = t0 + half;
430 h1 = t1 + half;
431 h2 = t2 + half;
432 h3 = t3 + half;
433
434 CMUL0(dst, 0, s0, s1, s2, s3, t0, t1, t2, t3, 0, 0);
435
436 hoff = 2 * step * (len4 >> 1);
437
438 j = 2;
439 k = 2 * step;
440 d1 = dst + 2;
441 d2 = dst + 2 + (len >> 1);
442 for (i = 0; i < (len4 - 1) >> 1; i++) {
443 CMUL1(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k);
444 CMUL1(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k);
445 j += 2;
446 k += 2 * step;
447 }
448 CMUL0(dst, len4, s0, s1, s2, s3, t0, t1, t2, t3, 1, hoff);
449 CMUL0(dst, len4 + len2, s0, s1, s2, s3, h0, h1, h2, h3, 1, hoff);
450
451 j = len4;
452 k = hoff + 2 * step * len4;
453 d1 = dst + len4 + 2;
454 d2 = dst + len4 + 2 + len2;
455 for (i = 0; i < (len4 - 2) >> 1; i++) {
456 CMUL2(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k);
457 CMUL2(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k);
458 j -= 2;
459 k += 2 * step;
460 }
461 CMUL0(dst, len2 + 4, s0, s1, s2, s3, t0, t1, t2, t3, 0, k);
462 }
463
464 static void wtf_end_512(On2AVCContext *c, float *out, float *src,
465 float *tmp0, float *tmp1)
466 {
467 memcpy(src, tmp0, 384 * sizeof(*tmp0));
468 memcpy(tmp0 + 384, src + 384, 128 * sizeof(*tmp0));
469
470 zero_head_and_tail(src, 128, 16, 4);
471 zero_head_and_tail(src + 128, 128, 16, 4);
472 zero_head_and_tail(src + 256, 128, 13, 7);
473 zero_head_and_tail(src + 384, 128, 15, 5);
474
475 c->fft128.fft_permute(&c->fft128, (FFTComplex*)src);
476 c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 128));
477 c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 256));
478 c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 384));
479 c->fft128.fft_calc(&c->fft128, (FFTComplex*)src);
480 c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 128));
481 c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 256));
482 c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 384));
483 combine_fft(src, src + 128, src + 256, src + 384, tmp1,
484 ff_on2avc_ctab_1, ff_on2avc_ctab_2,
485 ff_on2avc_ctab_3, ff_on2avc_ctab_4, 512, 2);
486 c->fft512.fft_permute(&c->fft512, (FFTComplex*)tmp1);
487 c->fft512.fft_calc(&c->fft512, (FFTComplex*)tmp1);
488
489 pretwiddle(&tmp0[ 0], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
490 pretwiddle(&tmp0[128], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
491 pretwiddle(&tmp0[256], tmp1, 512, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
492 pretwiddle(&tmp0[384], tmp1, 512, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
493
494 memcpy(src, tmp1, 512 * sizeof(float));
495 }
496
497 static void wtf_end_1024(On2AVCContext *c, float *out, float *src,
498 float *tmp0, float *tmp1)
499 {
500 memcpy(src, tmp0, 768 * sizeof(*tmp0));
501 memcpy(tmp0 + 768, src + 768, 256 * sizeof(*tmp0));
502
503 zero_head_and_tail(src, 256, 16, 4);
504 zero_head_and_tail(src + 256, 256, 16, 4);
505 zero_head_and_tail(src + 512, 256, 13, 7);
506 zero_head_and_tail(src + 768, 256, 15, 5);
507
508 c->fft256.fft_permute(&c->fft256, (FFTComplex*)src);
509 c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 256));
510 c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 512));
511 c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 768));
512 c->fft256.fft_calc(&c->fft256, (FFTComplex*)src);
513 c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 256));
514 c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 512));
515 c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 768));
516 combine_fft(src, src + 256, src + 512, src + 768, tmp1,
517 ff_on2avc_ctab_1, ff_on2avc_ctab_2,
518 ff_on2avc_ctab_3, ff_on2avc_ctab_4, 1024, 1);
519 c->fft1024.fft_permute(&c->fft1024, (FFTComplex*)tmp1);
520 c->fft1024.fft_calc(&c->fft1024, (FFTComplex*)tmp1);
521
522 pretwiddle(&tmp0[ 0], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
523 pretwiddle(&tmp0[256], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
524 pretwiddle(&tmp0[512], tmp1, 1024, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
525 pretwiddle(&tmp0[768], tmp1, 1024, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
526
527 memcpy(src, tmp1, 1024 * sizeof(float));
528 }
529
530 static void wtf_40(On2AVCContext *c, float *out, float *src, int size)
531 {
532 float *tmp0 = c->temp, *tmp1 = c->temp + 1024;
533
534 memset(tmp0, 0, sizeof(*tmp0) * 1024);
535 memset(tmp1, 0, sizeof(*tmp1) * 1024);
536
537 if (size == 512) {
538 twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
539 twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
540 twiddle(src + 16, &tmp0[ 16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
541 twiddle(src + 24, &tmp0[ 16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
542 twiddle(src + 32, &tmp0[ 32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
543 twiddle(src + 40, &tmp0[ 32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
544 twiddle(src + 48, &tmp0[ 48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
545 twiddle(src + 56, &tmp0[ 48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
546 twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
547 twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
548 twiddle(&tmp0[32], &tmp1[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
549 twiddle(&tmp0[48], &tmp1[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
550 twiddle(src + 64, &tmp1[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
551 twiddle(src + 80, &tmp1[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
552 twiddle(src + 96, &tmp1[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
553 twiddle(src + 112, &tmp1[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
554 twiddle(src + 128, &tmp1[128], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
555 twiddle(src + 144, &tmp1[128], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
556 twiddle(src + 160, &tmp1[160], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
557 twiddle(src + 176, &tmp1[160], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
558
559 memset(tmp0, 0, 64 * sizeof(*tmp0));
560
561 twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
562 twiddle(&tmp1[ 32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
563 twiddle(&tmp1[ 64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
564 twiddle(&tmp1[ 96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
565 twiddle(&tmp1[128], &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
566 twiddle(&tmp1[160], &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
567 twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
568 twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
569 twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
570 twiddle(src + 288, &tmp0[256], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
571 twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
572 twiddle(src + 352, &tmp0[256], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
573
574 wtf_end_512(c, out, src, tmp0, tmp1);
575 } else {
576 twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
577 twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
578 twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
579 twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
580 twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
581 twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
582 twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
583 twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
584 twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
585 twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
586 twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
587 twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
588 twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
589 twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
590 twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
591 twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
592 twiddle(src + 256, &tmp1[256], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
593 twiddle(src + 288, &tmp1[256], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
594 twiddle(src + 320, &tmp1[320], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
595 twiddle(src + 352, &tmp1[320], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
596
597 memset(tmp0, 0, 128 * sizeof(*tmp0));
598
599 twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
600 twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
601 twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
602 twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
603 twiddle(&tmp1[256], &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
604 twiddle(&tmp1[320], &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
605 twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
606 twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
607 twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
608 twiddle(src + 576, &tmp0[512], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
609 twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
610 twiddle(src + 704, &tmp0[512], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
611
612 wtf_end_1024(c, out, src, tmp0, tmp1);
613 }
614 }
615
616 static void wtf_44(On2AVCContext *c, float *out, float *src, int size)
617 {
618 float *tmp0 = c->temp, *tmp1 = c->temp + 1024;
619
620 memset(tmp0, 0, sizeof(*tmp0) * 1024);
621 memset(tmp1, 0, sizeof(*tmp1) * 1024);
622
623 if (size == 512) {
624 twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
625 twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
626 twiddle(src + 16, &tmp0[16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
627 twiddle(src + 24, &tmp0[16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
628 twiddle(src + 32, &tmp0[32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
629 twiddle(src + 40, &tmp0[32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
630 twiddle(src + 48, &tmp0[48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
631 twiddle(src + 56, &tmp0[48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
632 twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
633 twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
634 twiddle(&tmp0[32], &tmp1[32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
635 twiddle(&tmp0[48], &tmp1[32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
636 twiddle(src + 64, &tmp1[64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
637 twiddle(src + 80, &tmp1[64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
638 twiddle(src + 96, &tmp1[96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
639 twiddle(src + 112, &tmp1[96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
640
641 memset(tmp0, 0, 64 * sizeof(*tmp0));
642
643 twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
644 twiddle(&tmp1[32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
645 twiddle(&tmp1[64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
646 twiddle(&tmp1[96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
647 twiddle(src + 128, &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
648 twiddle(src + 160, &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
649 twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
650 twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
651 twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
652 twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
653
654 wtf_end_512(c, out, src, tmp0, tmp1);
655 } else {
656 twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
657 twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
658 twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
659 twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
660 twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
661 twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
662 twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
663 twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
664 twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
665 twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
666 twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
667 twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
668 twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
669 twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
670 twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
671 twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
672
673 memset(tmp0, 0, 128 * sizeof(*tmp0));
674
675 twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
676 twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
677 twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
678 twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
679 twiddle(src + 256, &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
680 twiddle(src + 320, &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
681 twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
682 twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
683 twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
684 twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
685
686 wtf_end_1024(c, out, src, tmp0, tmp1);
687 }
688 }
689
690 static int on2avc_reconstruct_channel_ext(On2AVCContext *c, AVFrame *dst, int offset)
691 {
692 int ch, i;
693
694 for (ch = 0; ch < c->avctx->channels; ch++) {
695 float *out = (float*)dst->extended_data[ch] + offset;
696 float *in = c->coeffs[ch];
697 float *saved = c->delay[ch];
698 float *buf = c->mdct_buf;
699 float *wout = out + 448;
700
701 switch (c->window_type) {
702 case WINDOW_TYPE_EXT7:
703 c->mdct.imdct_half(&c->mdct, buf, in);
704 break;
705 case WINDOW_TYPE_EXT4:
706 c->wtf(c, buf, in, 1024);
707 break;
708 case WINDOW_TYPE_EXT5:
709 c->wtf(c, buf, in, 512);
710 c->mdct.imdct_half(&c->mdct_half, buf + 512, in + 512);
711 for (i = 0; i < 256; i++) {
712 FFSWAP(float, buf[i + 512], buf[1023 - i]);
713 }
714 break;
715 case WINDOW_TYPE_EXT6:
716 c->mdct.imdct_half(&c->mdct_half, buf, in);
717 for (i = 0; i < 256; i++) {
718 FFSWAP(float, buf[i], buf[511 - i]);
719 }
720 c->wtf(c, buf + 512, in + 512, 512);
721 break;
722 }
723
724 memcpy(out, saved, 448 * sizeof(float));
725 c->fdsp->vector_fmul_window(wout, saved + 448, buf, c->short_win, 64);
726 memcpy(wout + 128, buf + 64, 448 * sizeof(float));
727 memcpy(saved, buf + 512, 448 * sizeof(float));
728 memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
729 }
730
731 return 0;
732 }
733
734 // not borrowed from aacdec.c - the codec has original design after all
735 30 static int on2avc_reconstruct_channel(On2AVCContext *c, int channel,
736 AVFrame *dst, int offset)
737 {
738 int i;
739 30 float *out = (float*)dst->extended_data[channel] + offset;
740 30 float *in = c->coeffs[channel];
741 30 float *saved = c->delay[channel];
742 30 float *buf = c->mdct_buf;
743 30 float *temp = c->temp;
744
745
1/3
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30 switch (c->window_type) {
746 30 case WINDOW_TYPE_LONG_START:
747 case WINDOW_TYPE_LONG_STOP:
748 case WINDOW_TYPE_LONG:
749 30 c->mdct.imdct_half(&c->mdct, buf, in);
750 30 break;
751 case WINDOW_TYPE_8SHORT:
752 for (i = 0; i < ON2AVC_SUBFRAME_SIZE; i += ON2AVC_SUBFRAME_SIZE / 8)
753 c->mdct_small.imdct_half(&c->mdct_small, buf + i, in + i);
754 break;
755 }
756
757
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30 if ((c->prev_window_type == WINDOW_TYPE_LONG ||
758 c->prev_window_type == WINDOW_TYPE_LONG_STOP) &&
759
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30 (c->window_type == WINDOW_TYPE_LONG ||
760 c->window_type == WINDOW_TYPE_LONG_START)) {
761 30 c->fdsp->vector_fmul_window(out, saved, buf, c->long_win, 512);
762 } else {
763 float *wout = out + 448;
764 memcpy(out, saved, 448 * sizeof(float));
765
766 if (c->window_type == WINDOW_TYPE_8SHORT) {
767 c->fdsp->vector_fmul_window(wout + 0*128, saved + 448, buf + 0*128, c->short_win, 64);
768 c->fdsp->vector_fmul_window(wout + 1*128, buf + 0*128 + 64, buf + 1*128, c->short_win, 64);
769 c->fdsp->vector_fmul_window(wout + 2*128, buf + 1*128 + 64, buf + 2*128, c->short_win, 64);
770 c->fdsp->vector_fmul_window(wout + 3*128, buf + 2*128 + 64, buf + 3*128, c->short_win, 64);
771 c->fdsp->vector_fmul_window(temp, buf + 3*128 + 64, buf + 4*128, c->short_win, 64);
772 memcpy(wout + 4*128, temp, 64 * sizeof(float));
773 } else {
774 c->fdsp->vector_fmul_window(wout, saved + 448, buf, c->short_win, 64);
775 memcpy(wout + 128, buf + 64, 448 * sizeof(float));
776 }
777 }
778
779 // buffer update
780
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30 switch (c->window_type) {
781 case WINDOW_TYPE_8SHORT:
782 memcpy(saved, temp + 64, 64 * sizeof(float));
783 c->fdsp->vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, c->short_win, 64);
784 c->fdsp->vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, c->short_win, 64);
785 c->fdsp->vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, c->short_win, 64);
786 memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
787 break;
788 case WINDOW_TYPE_LONG_START:
789 memcpy(saved, buf + 512, 448 * sizeof(float));
790 memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
791 break;
792 30 case WINDOW_TYPE_LONG_STOP:
793 case WINDOW_TYPE_LONG:
794 30 memcpy(saved, buf + 512, 512 * sizeof(float));
795 30 break;
796 }
797 30 return 0;
798 }
799
800 30 static int on2avc_decode_subframe(On2AVCContext *c, const uint8_t *buf,
801 int buf_size, AVFrame *dst, int offset)
802 {
803 GetBitContext gb;
804 int i, ret;
805
806
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30 if ((ret = init_get_bits8(&gb, buf, buf_size)) < 0)
807 return ret;
808
809
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30 if (get_bits1(&gb)) {
810 av_log(c->avctx, AV_LOG_ERROR, "enh bit set\n");
811 return AVERROR_INVALIDDATA;
812 }
813 30 c->prev_window_type = c->window_type;
814 30 c->window_type = get_bits(&gb, 3);
815
816 30 c->band_start = c->modes[c->window_type].band_start;
817 30 c->num_windows = c->modes[c->window_type].num_windows;
818 30 c->num_bands = c->modes[c->window_type].num_bands;
819 30 c->is_long = (c->window_type != WINDOW_TYPE_8SHORT);
820
821 30 c->grouping[0] = 1;
822
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30 for (i = 1; i < c->num_windows; i++)
823 c->grouping[i] = !get_bits1(&gb);
824
825 30 on2avc_read_ms_info(c, &gb);
826
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60 for (i = 0; i < c->avctx->channels; i++)
827
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30 if ((ret = on2avc_read_channel_data(c, &gb, i)) < 0)
828 return AVERROR_INVALIDDATA;
829
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30 if (c->avctx->channels == 2 && c->ms_present)
830 on2avc_apply_ms(c);
831
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30 if (c->window_type < WINDOW_TYPE_EXT4) {
832
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60 for (i = 0; i < c->avctx->channels; i++)
833 30 on2avc_reconstruct_channel(c, i, dst, offset);
834 } else {
835 on2avc_reconstruct_channel_ext(c, dst, offset);
836 }
837
838 30 return 0;
839 }
840
841 30 static int on2avc_decode_frame(AVCodecContext * avctx, void *data,
842 int *got_frame_ptr, AVPacket *avpkt)
843 {
844 30 AVFrame *frame = data;
845 30 const uint8_t *buf = avpkt->data;
846 30 int buf_size = avpkt->size;
847 30 On2AVCContext *c = avctx->priv_data;
848 GetByteContext gb;
849 30 int num_frames = 0, frame_size, audio_off;
850 int ret;
851
852
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30 if (c->is_av500) {
853 /* get output buffer */
854 30 frame->nb_samples = ON2AVC_SUBFRAME_SIZE;
855
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30 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
856 return ret;
857
858
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30 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 30 *got_frame_ptr = 1;
895
896 30 return buf_size;
897 }
898
899 3 static av_cold void on2avc_free_vlcs(On2AVCContext *c)
900 {
901 int i;
902
903 3 ff_free_vlc(&c->scale_diff);
904
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48 for (i = 1; i < 16; i++)
905 45 ff_free_vlc(&c->cb_vlc[i]);
906 3 }
907
908 3 static av_cold int on2avc_decode_init(AVCodecContext *avctx)
909 {
910 3 On2AVCContext *c = avctx->priv_data;
911 3 const uint8_t *lens = ff_on2avc_cb_lens;
912 3 const uint16_t *syms = ff_on2avc_cb_syms;
913 int i, ret;
914
915
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3 if (avctx->channels > 2U) {
916 avpriv_request_sample(avctx, "Decoding more than 2 channels");
917 return AVERROR_PATCHWELCOME;
918 }
919
920 3 c->avctx = avctx;
921 3 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
922 6 avctx->channel_layout = (avctx->channels == 2) ? AV_CH_LAYOUT_STEREO
923
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3 : AV_CH_LAYOUT_MONO;
924
925 3 c->is_av500 = (avctx->codec_tag == 0x500);
926
927
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3 if (avctx->channels == 2)
928 av_log(avctx, AV_LOG_WARNING,
929 "Stereo mode support is not good, patch is welcome\n");
930
931 // We add -0.01 before ceil() to avoid any values to fall at exactly the
932 // midpoint between different ceil values. The results are identical to
933 // using pow(10, i / 10.0) without such bias
934
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63 for (i = 0; i < 20; i++)
935 60 c->scale_tab[i] = ceil(ff_exp10(i * 0.1) * 16 - 0.01) / 32;
936
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327 for (; i < 128; i++)
937 324 c->scale_tab[i] = ceil(ff_exp10(i * 0.1) * 0.5 - 0.01);
938
939
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3 if (avctx->sample_rate < 32000 || avctx->channels == 1)
940 3 memcpy(c->long_win, ff_on2avc_window_long_24000,
941 1024 * sizeof(*c->long_win));
942 else
943 memcpy(c->long_win, ff_on2avc_window_long_32000,
944 1024 * sizeof(*c->long_win));
945 3 memcpy(c->short_win, ff_on2avc_window_short, 128 * sizeof(*c->short_win));
946
947 6 c->modes = (avctx->sample_rate <= 40000) ? ff_on2avc_modes_40
948
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3 : ff_on2avc_modes_44;
949
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3 c->wtf = (avctx->sample_rate <= 40000) ? wtf_40
950 : wtf_44;
951
952 3 ff_mdct_init(&c->mdct, 11, 1, 1.0 / (32768.0 * 1024.0));
953 3 ff_mdct_init(&c->mdct_half, 10, 1, 1.0 / (32768.0 * 512.0));
954 3 ff_mdct_init(&c->mdct_small, 8, 1, 1.0 / (32768.0 * 128.0));
955 3 ff_fft_init(&c->fft128, 6, 0);
956 3 ff_fft_init(&c->fft256, 7, 0);
957 3 ff_fft_init(&c->fft512, 8, 1);
958 3 ff_fft_init(&c->fft1024, 9, 1);
959 3 c->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
960
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3 if (!c->fdsp)
961 return AVERROR(ENOMEM);
962
963 3 ret = ff_init_vlc_from_lengths(&c->scale_diff, 9, ON2AVC_SCALE_DIFFS,
964 ff_on2avc_scale_diff_bits, 1,
965 ff_on2avc_scale_diff_syms, 1, 1, -60, 0, avctx);
966
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3 if (ret < 0)
967 goto vlc_fail;
968
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48 for (i = 1; i < 16; i++) {
969 45 int idx = i - 1;
970 45 ret = ff_init_vlc_from_lengths(&c->cb_vlc[i], 9, ff_on2avc_cb_elems[idx],
971 lens, 1,
972 syms, 2, 2, 0, 0, avctx);
973
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45 if (ret < 0)
974 goto vlc_fail;
975 45 lens += ff_on2avc_cb_elems[idx];
976 45 syms += ff_on2avc_cb_elems[idx];
977 }
978
979 3 return 0;
980 vlc_fail:
981 av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n");
982 return ret;
983 }
984
985 3 static av_cold int on2avc_decode_close(AVCodecContext *avctx)
986 {
987 3 On2AVCContext *c = avctx->priv_data;
988
989 3 ff_mdct_end(&c->mdct);
990 3 ff_mdct_end(&c->mdct_half);
991 3 ff_mdct_end(&c->mdct_small);
992 3 ff_fft_end(&c->fft128);
993 3 ff_fft_end(&c->fft256);
994 3 ff_fft_end(&c->fft512);
995 3 ff_fft_end(&c->fft1024);
996
997 3 av_freep(&c->fdsp);
998
999 3 on2avc_free_vlcs(c);
1000
1001 3 return 0;
1002 }
1003
1004
1005 const AVCodec ff_on2avc_decoder = {
1006 .name = "on2avc",
1007 .long_name = NULL_IF_CONFIG_SMALL("On2 Audio for Video Codec"),
1008 .type = AVMEDIA_TYPE_AUDIO,
1009 .id = AV_CODEC_ID_ON2AVC,
1010 .priv_data_size = sizeof(On2AVCContext),
1011 .init = on2avc_decode_init,
1012 .decode = on2avc_decode_frame,
1013 .close = on2avc_decode_close,
1014 .capabilities = AV_CODEC_CAP_DR1,
1015 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1016 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1017 AV_SAMPLE_FMT_NONE },
1018 };
1019