2 * On2 Audio for Video Codec decoder
4 * Copyright (c) 2013 Konstantin Shishkov
6 * This file is part of Libav.
8 * Libav 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.
13 * Libav 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.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/float_dsp.h"
27 #include "bitstream.h"
28 #include "bytestream.h"
33 #include "on2avcdata.h"
35 #define ON2AVC_SUBFRAME_SIZE 1024
39 WINDOW_TYPE_LONG_STOP,
40 WINDOW_TYPE_LONG_START,
41 WINDOW_TYPE_8SHORT = 3,
48 typedef struct On2AVCContext {
49 AVCodecContext *avctx;
50 AVFloatDSPContext fdsp;
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);
57 const On2AVCMode *modes;
58 int window_type, prev_window_type;
59 int num_windows, num_bands;
61 const int *band_start;
65 int ms_info[ON2AVC_MAX_BANDS];
69 uint8_t band_type[ON2AVC_MAX_BANDS];
70 uint8_t band_run_end[ON2AVC_MAX_BANDS];
73 float band_scales[ON2AVC_MAX_BANDS];
80 DECLARE_ALIGNED(32, float, coeffs)[2][ON2AVC_SUBFRAME_SIZE];
81 DECLARE_ALIGNED(32, float, delay) [2][ON2AVC_SUBFRAME_SIZE];
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];
89 static void on2avc_read_ms_info(On2AVCContext *c, BitstreamContext *bc)
91 int w, b, band_off = 0;
93 c->ms_present = bitstream_read_bit(bc);
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;
104 for (b = 0; b < c->num_bands; b++)
105 c->ms_info[band_off++] = bitstream_read_bit(bc);
109 // do not see Table 17 in ISO/IEC 13818-7
110 static int on2avc_decode_band_types(On2AVCContext *c, BitstreamContext *bc)
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;
117 while (band < num_bands) {
118 band_type = bitstream_read(bc, 4);
121 run = bitstream_read(bc, bits_per_sect);
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;
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;
138 // completely not like Table 18 in ISO/IEC 13818-7
139 // (no intensity stereo, different coding for the first coefficient)
140 static int on2avc_decode_band_scales(On2AVCContext *c, BitstreamContext *bc)
142 int w, w2, b, scale, first = 1;
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;
153 for (b = 0; b < c->num_bands; b++) {
154 if (!c->band_type[band_off]) {
156 for (w2 = w + 1; w2 < c->num_windows; w2++) {
159 if (c->band_type[w2 * c->num_bands + b]) {
165 c->band_scales[band_off++] = 0;
170 scale = bitstream_read(bc, 7);
173 scale += bitstream_read_vlc(bc, c->scale_diff.table, 9, 3) - 60;
175 if (scale < 0 || scale > 127) {
176 av_log(c->avctx, AV_LOG_ERROR, "Invalid scale value %d\n",
178 return AVERROR_INVALIDDATA;
180 c->band_scales[band_off++] = c->scale_tab[scale];
187 static inline float on2avc_scale(int v, float scale)
189 return v * sqrtf(abs(v)) * scale;
192 // spectral data is coded completely differently - there are no unsigned codebooks
193 static int on2avc_decode_quads(On2AVCContext *c, BitstreamContext *bc, float *dst,
194 int dst_size, int type, float band_scale)
198 for (i = 0; i < dst_size; i += 4) {
199 val = bitstream_read_vlc(bc, c->cb_vlc[type].table, 9, 3);
201 for (j = 0; j < 4; j++) {
202 val1 = sign_extend((val >> (12 - j * 4)) & 0xF, 4);
203 *dst++ = on2avc_scale(val1, band_scale);
210 static inline int get_egolomb(BitstreamContext *bc)
214 while (bitstream_read_bit(bc)) {
217 av_log(NULL, AV_LOG_WARNING, "Too large golomb code in get_egolomb.\n");
223 return (1 << v) + bitstream_read(bc, v);
226 static int on2avc_decode_pairs(On2AVCContext *c, BitstreamContext *bc, float *dst,
227 int dst_size, int type, float band_scale)
229 int i, val, val1, val2, sign;
231 for (i = 0; i < dst_size; i += 2) {
232 val = bitstream_read_vlc(bc, c->cb_vlc[type].table, 9, 3);
234 val1 = sign_extend(val >> 8, 8);
235 val2 = sign_extend(val & 0xFF, 8);
236 if (type == ON2AVC_ESC_CB) {
237 if (val1 <= -16 || val1 >= 16) {
238 sign = 1 - (val1 < 0) * 2;
239 val1 = sign * get_egolomb(bc);
241 if (val2 <= -16 || val2 >= 16) {
242 sign = 1 - (val2 < 0) * 2;
243 val2 = sign * get_egolomb(bc);
247 *dst++ = on2avc_scale(val1, band_scale);
248 *dst++ = on2avc_scale(val2, band_scale);
254 static int on2avc_read_channel_data(On2AVCContext *c, BitstreamContext *bc, int ch)
260 if ((ret = on2avc_decode_band_types(c, bc)) < 0)
262 if ((ret = on2avc_decode_band_scales(c, bc)) < 0)
265 coeff_ptr = c->coeffs[ch];
267 memset(coeff_ptr, 0, ON2AVC_SUBFRAME_SIZE * sizeof(*coeff_ptr));
268 for (w = 0; w < c->num_windows; w++) {
269 for (b = 0; b < c->num_bands; b++) {
270 int band_size = c->band_start[b + 1] - c->band_start[b];
271 int band_type = c->band_type[band_idx + b];
274 coeff_ptr += band_size;
278 on2avc_decode_quads(c, bc, coeff_ptr, band_size, band_type,
279 c->band_scales[band_idx + b]);
281 on2avc_decode_pairs(c, bc, coeff_ptr, band_size, band_type,
282 c->band_scales[band_idx + b]);
283 coeff_ptr += band_size;
285 band_idx += c->num_bands;
291 static int on2avc_apply_ms(On2AVCContext *c)
295 float *ch0 = c->coeffs[0];
296 float *ch1 = c->coeffs[1];
298 for (w = 0; w < c->num_windows; w++) {
299 for (b = 0; b < c->num_bands; b++) {
300 if (c->ms_info[band_off + b]) {
301 for (i = c->band_start[b]; i < c->band_start[b + 1]; i++) {
302 float l = *ch0, r = *ch1;
307 ch0 += c->band_start[b + 1] - c->band_start[b];
308 ch1 += c->band_start[b + 1] - c->band_start[b];
311 band_off += c->num_bands;
316 static void zero_head_and_tail(float *src, int len, int order0, int order1)
318 memset(src, 0, sizeof(*src) * order0);
319 memset(src + len - order1, 0, sizeof(*src) * order1);
322 static void pretwiddle(float *src, float *dst, int dst_len, int tab_step,
323 int step, int order0, int order1, const double **tabs)
331 for (i = 0; i < tab_step; i++) {
333 for (j = 0; j < order0; j++)
334 sum += src[j] * tab[j * tab_step + i];
338 out = dst + dst_len - tab_step;
340 src2 = src + (dst_len - tab_step) / step + 1 + order0;
341 for (i = 0; i < tab_step; i++) {
343 for (j = 0; j < order1; j++)
344 sum += src2[j] * tab[j * tab_step + i];
349 static void twiddle(float *src1, float *src2, int src2_len,
350 const double *tab, int tab_len, int step,
351 int order0, int order1, const double **tabs)
357 steps = (src2_len - tab_len) / step + 1;
358 pretwiddle(src1, src2, src2_len, tab_len, step, order0, order1, tabs);
361 for (i = 0; i < steps; i++) {
362 float in0 = src1[order0 + i];
363 int pos = (src2_len - 1) & mask;
366 const double *t = tab;
367 for (j = pos; j >= 0; j--)
368 src2[j] += in0 * *t++;
369 for (j = 0; j < tab_len - pos - 1; j++)
370 src2[src2_len - j - 1] += in0 * tab[pos + 1 + j];
372 for (j = 0; j < tab_len; j++)
373 src2[pos - j] += in0 * tab[j];
379 #define CMUL1_R(s, t, is, it) \
380 s[is + 0] * t[it + 0] - s[is + 1] * t[it + 1]
381 #define CMUL1_I(s, t, is, it) \
382 s[is + 0] * t[it + 1] + s[is + 1] * t[it + 0]
383 #define CMUL2_R(s, t, is, it) \
384 s[is + 0] * t[it + 0] + s[is + 1] * t[it + 1]
385 #define CMUL2_I(s, t, is, it) \
386 s[is + 0] * t[it + 1] - s[is + 1] * t[it + 0]
388 #define CMUL0(dst, id, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
389 dst[id] = s0[is] * t0[it] + s1[is] * t1[it] \
390 + s2[is] * t2[it] + s3[is] * t3[it]; \
391 dst[id + 1] = s0[is] * t0[it + 1] + s1[is] * t1[it + 1] \
392 + s2[is] * t2[it + 1] + s3[is] * t3[it + 1];
394 #define CMUL1(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
395 *dst++ = CMUL1_R(s0, t0, is, it) \
396 + CMUL1_R(s1, t1, is, it) \
397 + CMUL1_R(s2, t2, is, it) \
398 + CMUL1_R(s3, t3, is, it); \
399 *dst++ = CMUL1_I(s0, t0, is, it) \
400 + CMUL1_I(s1, t1, is, it) \
401 + CMUL1_I(s2, t2, is, it) \
402 + CMUL1_I(s3, t3, is, it);
404 #define CMUL2(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \
405 *dst++ = CMUL2_R(s0, t0, is, it) \
406 + CMUL2_R(s1, t1, is, it) \
407 + CMUL2_R(s2, t2, is, it) \
408 + CMUL2_R(s3, t3, is, it); \
409 *dst++ = CMUL2_I(s0, t0, is, it) \
410 + CMUL2_I(s1, t1, is, it) \
411 + CMUL2_I(s2, t2, is, it) \
412 + CMUL2_I(s3, t3, is, it);
414 static void combine_fft(float *s0, float *s1, float *s2, float *s3, float *dst,
415 const float *t0, const float *t1,
416 const float *t2, const float *t3, int len, int step)
418 const float *h0, *h1, *h2, *h3;
421 int len2 = len >> 1, len4 = len >> 2;
426 for (half = len2; tmp > 1; half <<= 1, tmp >>= 1);
433 CMUL0(dst, 0, s0, s1, s2, s3, t0, t1, t2, t3, 0, 0);
435 hoff = 2 * step * (len4 >> 1);
440 d2 = dst + 2 + (len >> 1);
441 for (i = 0; i < (len4 - 1) >> 1; i++) {
442 CMUL1(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k);
443 CMUL1(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k);
447 CMUL0(dst, len4, s0, s1, s2, s3, t0, t1, t2, t3, 1, hoff);
448 CMUL0(dst, len4 + len2, s0, s1, s2, s3, h0, h1, h2, h3, 1, hoff);
451 k = hoff + 2 * step * len4;
453 d2 = dst + len4 + 2 + len2;
454 for (i = 0; i < (len4 - 2) >> 1; i++) {
455 CMUL2(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k);
456 CMUL2(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k);
460 CMUL0(dst, len2 + 4, s0, s1, s2, s3, t0, t1, t2, t3, 0, k);
463 static void wtf_end_512(On2AVCContext *c, float *out, float *src,
464 float *tmp0, float *tmp1)
466 memcpy(src, tmp0, 384 * sizeof(*tmp0));
467 memcpy(tmp0 + 384, src + 384, 128 * sizeof(*tmp0));
469 zero_head_and_tail(src, 128, 16, 4);
470 zero_head_and_tail(src + 128, 128, 16, 4);
471 zero_head_and_tail(src + 256, 128, 13, 7);
472 zero_head_and_tail(src + 384, 128, 15, 5);
474 c->fft128.fft_permute(&c->fft128, (FFTComplex*)src);
475 c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 128));
476 c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 256));
477 c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 384));
478 c->fft128.fft_calc(&c->fft128, (FFTComplex*)src);
479 c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 128));
480 c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 256));
481 c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 384));
482 combine_fft(src, src + 128, src + 256, src + 384, tmp1,
483 ff_on2avc_ctab_1, ff_on2avc_ctab_2,
484 ff_on2avc_ctab_3, ff_on2avc_ctab_4, 512, 2);
485 c->fft512.fft_permute(&c->fft512, (FFTComplex*)tmp1);
486 c->fft512.fft_calc(&c->fft512, (FFTComplex*)tmp1);
488 pretwiddle(&tmp0[ 0], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
489 pretwiddle(&tmp0[128], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
490 pretwiddle(&tmp0[256], tmp1, 512, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
491 pretwiddle(&tmp0[384], tmp1, 512, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
493 memcpy(src, tmp1, 512 * sizeof(float));
496 static void wtf_end_1024(On2AVCContext *c, float *out, float *src,
497 float *tmp0, float *tmp1)
499 memcpy(src, tmp0, 768 * sizeof(*tmp0));
500 memcpy(tmp0 + 768, src + 768, 256 * sizeof(*tmp0));
502 zero_head_and_tail(src, 256, 16, 4);
503 zero_head_and_tail(src + 256, 256, 16, 4);
504 zero_head_and_tail(src + 512, 256, 13, 7);
505 zero_head_and_tail(src + 768, 256, 15, 5);
507 c->fft256.fft_permute(&c->fft256, (FFTComplex*)src);
508 c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 256));
509 c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 512));
510 c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 768));
511 c->fft256.fft_calc(&c->fft256, (FFTComplex*)src);
512 c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 256));
513 c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 512));
514 c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 768));
515 combine_fft(src, src + 256, src + 512, src + 768, tmp1,
516 ff_on2avc_ctab_1, ff_on2avc_ctab_2,
517 ff_on2avc_ctab_3, ff_on2avc_ctab_4, 1024, 1);
518 c->fft1024.fft_permute(&c->fft1024, (FFTComplex*)tmp1);
519 c->fft1024.fft_calc(&c->fft1024, (FFTComplex*)tmp1);
521 pretwiddle(&tmp0[ 0], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
522 pretwiddle(&tmp0[256], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
523 pretwiddle(&tmp0[512], tmp1, 1024, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
524 pretwiddle(&tmp0[768], tmp1, 1024, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
526 memcpy(src, tmp1, 1024 * sizeof(float));
529 static void wtf_40(On2AVCContext *c, float *out, float *src, int size)
531 float *tmp0 = c->temp, *tmp1 = c->temp + 1024;
533 memset(tmp0, 0, sizeof(*tmp0) * 1024);
534 memset(tmp1, 0, sizeof(*tmp1) * 1024);
537 twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
538 twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
539 twiddle(src + 16, &tmp0[ 16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
540 twiddle(src + 24, &tmp0[ 16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
541 twiddle(src + 32, &tmp0[ 32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
542 twiddle(src + 40, &tmp0[ 32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
543 twiddle(src + 48, &tmp0[ 48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
544 twiddle(src + 56, &tmp0[ 48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
545 twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
546 twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
547 twiddle(&tmp0[32], &tmp1[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
548 twiddle(&tmp0[48], &tmp1[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
549 twiddle(src + 64, &tmp1[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
550 twiddle(src + 80, &tmp1[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
551 twiddle(src + 96, &tmp1[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
552 twiddle(src + 112, &tmp1[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
553 twiddle(src + 128, &tmp1[128], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
554 twiddle(src + 144, &tmp1[128], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
555 twiddle(src + 160, &tmp1[160], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
556 twiddle(src + 176, &tmp1[160], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
558 memset(tmp0, 0, 64 * sizeof(*tmp0));
560 twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
561 twiddle(&tmp1[ 32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
562 twiddle(&tmp1[ 64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
563 twiddle(&tmp1[ 96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
564 twiddle(&tmp1[128], &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
565 twiddle(&tmp1[160], &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
566 twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
567 twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
568 twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
569 twiddle(src + 288, &tmp0[256], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
570 twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
571 twiddle(src + 352, &tmp0[256], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
573 wtf_end_512(c, out, src, tmp0, tmp1);
575 twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
576 twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
577 twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
578 twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
579 twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
580 twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
581 twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
582 twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
583 twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
584 twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
585 twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
586 twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
587 twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
588 twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
589 twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
590 twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
591 twiddle(src + 256, &tmp1[256], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
592 twiddle(src + 288, &tmp1[256], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
593 twiddle(src + 320, &tmp1[320], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
594 twiddle(src + 352, &tmp1[320], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
596 memset(tmp0, 0, 128 * sizeof(*tmp0));
598 twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
599 twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
600 twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
601 twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
602 twiddle(&tmp1[256], &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
603 twiddle(&tmp1[320], &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
604 twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
605 twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
606 twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
607 twiddle(src + 576, &tmp0[512], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
608 twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
609 twiddle(src + 704, &tmp0[512], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
611 wtf_end_1024(c, out, src, tmp0, tmp1);
615 static void wtf_44(On2AVCContext *c, float *out, float *src, int size)
617 float *tmp0 = c->temp, *tmp1 = c->temp + 1024;
619 memset(tmp0, 0, sizeof(*tmp0) * 1024);
620 memset(tmp1, 0, sizeof(*tmp1) * 1024);
623 twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
624 twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
625 twiddle(src + 16, &tmp0[16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
626 twiddle(src + 24, &tmp0[16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
627 twiddle(src + 32, &tmp0[32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
628 twiddle(src + 40, &tmp0[32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
629 twiddle(src + 48, &tmp0[48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2);
630 twiddle(src + 56, &tmp0[48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1);
631 twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
632 twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
633 twiddle(&tmp0[32], &tmp1[32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
634 twiddle(&tmp0[48], &tmp1[32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
635 twiddle(src + 64, &tmp1[64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
636 twiddle(src + 80, &tmp1[64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
637 twiddle(src + 96, &tmp1[96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
638 twiddle(src + 112, &tmp1[96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
640 memset(tmp0, 0, 64 * sizeof(*tmp0));
642 twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
643 twiddle(&tmp1[32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
644 twiddle(&tmp1[64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
645 twiddle(&tmp1[96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
646 twiddle(src + 128, &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
647 twiddle(src + 160, &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
648 twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
649 twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
650 twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
651 twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
653 wtf_end_512(c, out, src, tmp0, tmp1);
655 twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
656 twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
657 twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
658 twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
659 twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
660 twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
661 twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2);
662 twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1);
663 twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
664 twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
665 twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
666 twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
667 twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
668 twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
669 twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
670 twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
672 memset(tmp0, 0, 128 * sizeof(*tmp0));
674 twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
675 twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
676 twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
677 twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
678 twiddle(src + 256, &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4);
679 twiddle(src + 320, &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3);
680 twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2);
681 twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1);
682 twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1);
683 twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2);
685 wtf_end_1024(c, out, src, tmp0, tmp1);
689 static int on2avc_reconstruct_stereo(On2AVCContext *c, AVFrame *dst, int offset)
693 for (ch = 0; ch < 2; ch++) {
694 float *out = (float*)dst->extended_data[ch] + offset;
695 float *in = c->coeffs[ch];
696 float *saved = c->delay[ch];
697 float *buf = c->mdct_buf;
698 float *wout = out + 448;
700 switch (c->window_type) {
701 case WINDOW_TYPE_EXT7:
702 c->mdct.imdct_half(&c->mdct, buf, in);
704 case WINDOW_TYPE_EXT4:
705 c->wtf(c, buf, in, 1024);
707 case WINDOW_TYPE_EXT5:
708 c->wtf(c, buf, in, 512);
709 c->mdct.imdct_half(&c->mdct_half, buf + 512, in + 512);
710 for (i = 0; i < 256; i++) {
711 FFSWAP(float, buf[i + 512], buf[1023 - i]);
714 case WINDOW_TYPE_EXT6:
715 c->mdct.imdct_half(&c->mdct_half, buf, in);
716 for (i = 0; i < 256; i++) {
717 FFSWAP(float, buf[i], buf[511 - i]);
719 c->wtf(c, buf + 512, in + 512, 512);
723 memcpy(out, saved, 448 * sizeof(float));
724 c->fdsp.vector_fmul_window(wout, saved + 448, buf, c->short_win, 64);
725 memcpy(wout + 128, buf + 64, 448 * sizeof(float));
726 memcpy(saved, buf + 512, 448 * sizeof(float));
727 memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
733 // not borrowed from aacdec.c - the codec has original design after all
734 static int on2avc_reconstruct_channel(On2AVCContext *c, int channel,
735 AVFrame *dst, int offset)
738 float *out = (float*)dst->extended_data[channel] + offset;
739 float *in = c->coeffs[channel];
740 float *saved = c->delay[channel];
741 float *buf = c->mdct_buf;
742 float *temp = c->temp;
744 switch (c->window_type) {
745 case WINDOW_TYPE_LONG_START:
746 case WINDOW_TYPE_LONG_STOP:
747 case WINDOW_TYPE_LONG:
748 c->mdct.imdct_half(&c->mdct, buf, in);
750 case WINDOW_TYPE_8SHORT:
751 for (i = 0; i < ON2AVC_SUBFRAME_SIZE; i += ON2AVC_SUBFRAME_SIZE / 8)
752 c->mdct_small.imdct_half(&c->mdct_small, buf + i, in + i);
756 if ((c->prev_window_type == WINDOW_TYPE_LONG ||
757 c->prev_window_type == WINDOW_TYPE_LONG_STOP) &&
758 (c->window_type == WINDOW_TYPE_LONG ||
759 c->window_type == WINDOW_TYPE_LONG_START)) {
760 c->fdsp.vector_fmul_window(out, saved, buf, c->long_win, 512);
762 float *wout = out + 448;
763 memcpy(out, saved, 448 * sizeof(float));
765 if (c->window_type == WINDOW_TYPE_8SHORT) {
766 c->fdsp.vector_fmul_window(wout + 0*128, saved + 448, buf + 0*128, c->short_win, 64);
767 c->fdsp.vector_fmul_window(wout + 1*128, buf + 0*128 + 64, buf + 1*128, c->short_win, 64);
768 c->fdsp.vector_fmul_window(wout + 2*128, buf + 1*128 + 64, buf + 2*128, c->short_win, 64);
769 c->fdsp.vector_fmul_window(wout + 3*128, buf + 2*128 + 64, buf + 3*128, c->short_win, 64);
770 c->fdsp.vector_fmul_window(temp, buf + 3*128 + 64, buf + 4*128, c->short_win, 64);
771 memcpy(wout + 4*128, temp, 64 * sizeof(float));
773 c->fdsp.vector_fmul_window(wout, saved + 448, buf, c->short_win, 64);
774 memcpy(wout + 128, buf + 64, 448 * sizeof(float));
779 switch (c->window_type) {
780 case WINDOW_TYPE_8SHORT:
781 memcpy(saved, temp + 64, 64 * sizeof(float));
782 c->fdsp.vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, c->short_win, 64);
783 c->fdsp.vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, c->short_win, 64);
784 c->fdsp.vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, c->short_win, 64);
785 memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
787 case WINDOW_TYPE_LONG_START:
788 memcpy(saved, buf + 512, 448 * sizeof(float));
789 memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
791 case WINDOW_TYPE_LONG_STOP:
792 case WINDOW_TYPE_LONG:
793 memcpy(saved, buf + 512, 512 * sizeof(float));
799 static int on2avc_decode_subframe(On2AVCContext *c, const uint8_t *buf,
800 int buf_size, AVFrame *dst, int offset)
805 bitstream_init8(&bc, buf, buf_size);
806 if (bitstream_read_bit(&bc)) {
807 av_log(c->avctx, AV_LOG_ERROR, "enh bit set\n");
808 return AVERROR_INVALIDDATA;
810 c->prev_window_type = c->window_type;
811 c->window_type = bitstream_read(&bc, 3);
812 if (c->window_type >= WINDOW_TYPE_EXT4 && c->avctx->channels == 1) {
813 av_log(c->avctx, AV_LOG_ERROR, "stereo mode window for mono audio\n");
814 return AVERROR_INVALIDDATA;
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);
823 for (i = 1; i < c->num_windows; i++)
824 c->grouping[i] = !bitstream_read_bit(&bc);
826 on2avc_read_ms_info(c, &bc);
827 for (i = 0; i < c->avctx->channels; i++)
828 if ((ret = on2avc_read_channel_data(c, &bc, i)) < 0)
829 return AVERROR_INVALIDDATA;
830 if (c->avctx->channels == 2 && c->ms_present)
832 if (c->window_type < WINDOW_TYPE_EXT4) {
833 for (i = 0; i < c->avctx->channels; i++)
834 on2avc_reconstruct_channel(c, i, dst, offset);
836 on2avc_reconstruct_stereo(c, dst, offset);
842 static int on2avc_decode_frame(AVCodecContext * avctx, void *data,
843 int *got_frame_ptr, AVPacket *avpkt)
845 AVFrame *frame = data;
846 const uint8_t *buf = avpkt->data;
847 int buf_size = avpkt->size;
848 On2AVCContext *c = avctx->priv_data;
850 int num_frames = 0, frame_size, audio_off;
854 /* get output buffer */
855 frame->nb_samples = ON2AVC_SUBFRAME_SIZE;
856 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
857 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
861 if ((ret = on2avc_decode_subframe(c, buf, buf_size, frame, 0)) < 0)
864 bytestream2_init(&gb, buf, buf_size);
865 while (bytestream2_get_bytes_left(&gb) > 2) {
866 frame_size = bytestream2_get_le16(&gb);
867 if (!frame_size || frame_size > bytestream2_get_bytes_left(&gb)) {
868 av_log(avctx, AV_LOG_ERROR, "Invalid subframe size %d\n",
870 return AVERROR_INVALIDDATA;
873 bytestream2_skip(&gb, frame_size);
876 av_log(avctx, AV_LOG_ERROR, "No subframes present\n");
877 return AVERROR_INVALIDDATA;
880 /* get output buffer */
881 frame->nb_samples = ON2AVC_SUBFRAME_SIZE * num_frames;
882 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
883 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
888 bytestream2_init(&gb, buf, buf_size);
889 while (bytestream2_get_bytes_left(&gb) > 2) {
890 frame_size = bytestream2_get_le16(&gb);
891 if ((ret = on2avc_decode_subframe(c, gb.buffer, frame_size,
892 frame, audio_off)) < 0)
894 audio_off += ON2AVC_SUBFRAME_SIZE;
895 bytestream2_skip(&gb, frame_size);
904 static av_cold void on2avc_free_vlcs(On2AVCContext *c)
908 ff_free_vlc(&c->scale_diff);
909 for (i = 1; i < 16; i++)
910 ff_free_vlc(&c->cb_vlc[i]);
913 static av_cold int on2avc_decode_init(AVCodecContext *avctx)
915 On2AVCContext *c = avctx->priv_data;
919 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
920 avctx->channel_layout = (avctx->channels == 2) ? AV_CH_LAYOUT_STEREO
923 c->is_av500 = (avctx->codec_tag == 0x500);
924 if (c->is_av500 && avctx->channels == 2) {
925 av_log(avctx, AV_LOG_ERROR, "0x500 version should be mono\n");
926 return AVERROR_INVALIDDATA;
928 if (avctx->channels > 2) {
929 av_log(avctx, AV_LOG_ERROR, "Only 1 or 2 channels are supported.\n");
930 return AVERROR(EINVAL);
932 if (avctx->channels == 2)
933 av_log(avctx, AV_LOG_WARNING,
934 "Stereo mode support is not good, patch is welcome\n");
936 for (i = 0; i < 20; i++)
937 c->scale_tab[i] = ceil(pow(10.0, i * 0.1) * 16) / 32;
939 c->scale_tab[i] = ceil(pow(10.0, i * 0.1) * 0.5);
941 if (avctx->sample_rate < 32000 || avctx->channels == 1)
942 memcpy(c->long_win, ff_on2avc_window_long_24000,
943 1024 * sizeof(*c->long_win));
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));
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
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 avpriv_float_dsp_init(&c->fdsp, avctx->flags & AV_CODEC_FLAG_BITEXACT);
963 if (init_vlc(&c->scale_diff, 9, ON2AVC_SCALE_DIFFS,
964 ff_on2avc_scale_diff_bits, 1, 1,
965 ff_on2avc_scale_diff_codes, 4, 4, 0)) {
966 av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n");
967 return AVERROR(ENOMEM);
969 for (i = 1; i < 9; i++) {
971 if (ff_init_vlc_sparse(&c->cb_vlc[i], 9, ff_on2avc_quad_cb_elems[idx],
972 ff_on2avc_quad_cb_bits[idx], 1, 1,
973 ff_on2avc_quad_cb_codes[idx], 4, 4,
974 ff_on2avc_quad_cb_syms[idx], 2, 2, 0)) {
975 av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n");
977 return AVERROR(ENOMEM);
980 for (i = 9; i < 16; i++) {
982 if (ff_init_vlc_sparse(&c->cb_vlc[i], 9, ff_on2avc_pair_cb_elems[idx],
983 ff_on2avc_pair_cb_bits[idx], 1, 1,
984 ff_on2avc_pair_cb_codes[idx], 2, 2,
985 ff_on2avc_pair_cb_syms[idx], 2, 2, 0)) {
986 av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n");
988 return AVERROR(ENOMEM);
995 static av_cold int on2avc_decode_close(AVCodecContext *avctx)
997 On2AVCContext *c = avctx->priv_data;
999 ff_mdct_end(&c->mdct);
1000 ff_mdct_end(&c->mdct_half);
1001 ff_mdct_end(&c->mdct_small);
1002 ff_fft_end(&c->fft128);
1003 ff_fft_end(&c->fft256);
1004 ff_fft_end(&c->fft512);
1005 ff_fft_end(&c->fft1024);
1007 on2avc_free_vlcs(c);
1013 AVCodec ff_on2avc_decoder = {
1015 .long_name = NULL_IF_CONFIG_SMALL("On2 Audio for Video Codec"),
1016 .type = AVMEDIA_TYPE_AUDIO,
1017 .id = AV_CODEC_ID_ON2AVC,
1018 .priv_data_size = sizeof(On2AVCContext),
1019 .init = on2avc_decode_init,
1020 .decode = on2avc_decode_frame,
1021 .close = on2avc_decode_close,
1022 .capabilities = AV_CODEC_CAP_DR1,
1023 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1024 AV_SAMPLE_FMT_NONE },