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1/*
2 * Copyright (c) 2012 Konstantin Shishkov
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * Common functions for Microsoft Screen 1 and 2
24 */
25
26#include <inttypes.h>
27
28#include "libavutil/intfloat.h"
29#include "libavutil/intreadwrite.h"
30#include "avcodec.h"
31#include "mss12.h"
32
33enum SplitMode {
34 SPLIT_VERT = 0,
35 SPLIT_HOR,
36 SPLIT_NONE
37};
38
39static const int sec_order_sizes[4] = { 1, 7, 6, 1 };
40
41enum ContextDirection {
42 TOP_LEFT = 0,
43 TOP,
44 TOP_RIGHT,
45 LEFT
46};
47
48static int model_calc_threshold(Model *m)
49{
50 int thr;
51
52 thr = 2 * m->weights[m->num_syms] - 1;
53 thr = ((thr >> 1) + 4 * m->cum_prob[0]) / thr;
54
55 return FFMIN(thr, 0x3FFF);
56}
57
58static void model_reset(Model *m)
59{
60 int i;
61
62 for (i = 0; i <= m->num_syms; i++) {
63 m->weights[i] = 1;
64 m->cum_prob[i] = m->num_syms - i;
65 }
66 m->weights[0] = 0;
67 for (i = 0; i < m->num_syms; i++)
68 m->idx2sym[i + 1] = i;
69}
70
71static av_cold void model_init(Model *m, int num_syms, int thr_weight)
72{
73 m->num_syms = num_syms;
74 m->thr_weight = thr_weight;
75 m->threshold = num_syms * thr_weight;
76}
77
78static void model_rescale_weights(Model *m)
79{
80 int i;
81 int cum_prob;
82
83 if (m->thr_weight == THRESH_ADAPTIVE)
84 m->threshold = model_calc_threshold(m);
85 while (m->cum_prob[0] > m->threshold) {
86 cum_prob = 0;
87 for (i = m->num_syms; i >= 0; i--) {
88 m->cum_prob[i] = cum_prob;
89 m->weights[i] = (m->weights[i] + 1) >> 1;
90 cum_prob += m->weights[i];
91 }
92 }
93}
94
95void ff_mss12_model_update(Model *m, int val)
96{
97 int i;
98
99 if (m->weights[val] == m->weights[val - 1]) {
100 for (i = val; m->weights[i - 1] == m->weights[val]; i--);
101 if (i != val) {
102 int sym1, sym2;
103
104 sym1 = m->idx2sym[val];
105 sym2 = m->idx2sym[i];
106
107 m->idx2sym[val] = sym2;
108 m->idx2sym[i] = sym1;
109
110 val = i;
111 }
112 }
113 m->weights[val]++;
114 for (i = val - 1; i >= 0; i--)
115 m->cum_prob[i]++;
116 model_rescale_weights(m);
117}
118
119static void pixctx_reset(PixContext *ctx)
120{
121 int i, j;
122
123 if (!ctx->special_initial_cache)
124 for (i = 0; i < ctx->cache_size; i++)
125 ctx->cache[i] = i;
126 else {
127 ctx->cache[0] = 1;
128 ctx->cache[1] = 2;
129 ctx->cache[2] = 4;
130 }
131
132 model_reset(&ctx->cache_model);
133 model_reset(&ctx->full_model);
134
135 for (i = 0; i < 15; i++)
136 for (j = 0; j < 4; j++)
137 model_reset(&ctx->sec_models[i][j]);
138}
139
140static av_cold void pixctx_init(PixContext *ctx, int cache_size,
141 int full_model_syms, int special_initial_cache)
142{
143 int i, j, k, idx;
144
145 ctx->cache_size = cache_size + 4;
146 ctx->num_syms = cache_size;
147 ctx->special_initial_cache = special_initial_cache;
148
149 model_init(&ctx->cache_model, ctx->num_syms + 1, THRESH_LOW);
150 model_init(&ctx->full_model, full_model_syms, THRESH_HIGH);
151
152 for (i = 0, idx = 0; i < 4; i++)
153 for (j = 0; j < sec_order_sizes[i]; j++, idx++)
154 for (k = 0; k < 4; k++)
155 model_init(&ctx->sec_models[idx][k], 2 + i,
156 i ? THRESH_LOW : THRESH_ADAPTIVE);
157}
158
159static av_always_inline int decode_pixel(ArithCoder *acoder, PixContext *pctx,
160 uint8_t *ngb, int num_ngb, int any_ngb)
161{
162 int i, val, pix;
163
164 val = acoder->get_model_sym(acoder, &pctx->cache_model);
165 if (val < pctx->num_syms) {
166 if (any_ngb) {
167 int idx, j;
168
169 idx = 0;
170 for (i = 0; i < pctx->cache_size; i++) {
171 for (j = 0; j < num_ngb; j++)
172 if (pctx->cache[i] == ngb[j])
173 break;
174 if (j == num_ngb) {
175 if (idx == val)
176 break;
177 idx++;
178 }
179 }
180 val = FFMIN(i, pctx->cache_size - 1);
181 }
182 pix = pctx->cache[val];
183 } else {
184 pix = acoder->get_model_sym(acoder, &pctx->full_model);
185 for (i = 0; i < pctx->cache_size - 1; i++)
186 if (pctx->cache[i] == pix)
187 break;
188 val = i;
189 }
190 if (val) {
191 for (i = val; i > 0; i--)
192 pctx->cache[i] = pctx->cache[i - 1];
193 pctx->cache[0] = pix;
194 }
195
196 return pix;
197}
198
199static int decode_pixel_in_context(ArithCoder *acoder, PixContext *pctx,
200 uint8_t *src, ptrdiff_t stride, int x, int y,
201 int has_right)
202{
203 uint8_t neighbours[4];
204 uint8_t ref_pix[4];
205 int nlen;
206 int layer = 0, sub;
207 int pix;
208 int i, j;
209
210 if (!y) {
211 memset(neighbours, src[-1], 4);
212 } else {
213 neighbours[TOP] = src[-stride];
214 if (!x) {
215 neighbours[TOP_LEFT] = neighbours[LEFT] = neighbours[TOP];
216 } else {
217 neighbours[TOP_LEFT] = src[-stride - 1];
218 neighbours[ LEFT] = src[-1];
219 }
220 if (has_right)
221 neighbours[TOP_RIGHT] = src[-stride + 1];
222 else
223 neighbours[TOP_RIGHT] = neighbours[TOP];
224 }
225
226 sub = 0;
227 if (x >= 2 && src[-2] == neighbours[LEFT])
228 sub = 1;
229 if (y >= 2 && src[-2 * stride] == neighbours[TOP])
230 sub |= 2;
231
232 nlen = 1;
233 ref_pix[0] = neighbours[0];
234 for (i = 1; i < 4; i++) {
235 for (j = 0; j < nlen; j++)
236 if (ref_pix[j] == neighbours[i])
237 break;
238 if (j == nlen)
239 ref_pix[nlen++] = neighbours[i];
240 }
241
242 switch (nlen) {
243 case 1:
244 layer = 0;
245 break;
246 case 2:
247 if (neighbours[TOP] == neighbours[TOP_LEFT]) {
248 if (neighbours[TOP_RIGHT] == neighbours[TOP_LEFT])
249 layer = 1;
250 else if (neighbours[LEFT] == neighbours[TOP_LEFT])
251 layer = 2;
252 else
253 layer = 3;
254 } else if (neighbours[TOP_RIGHT] == neighbours[TOP_LEFT]) {
255 if (neighbours[LEFT] == neighbours[TOP_LEFT])
256 layer = 4;
257 else
258 layer = 5;
259 } else if (neighbours[LEFT] == neighbours[TOP_LEFT]) {
260 layer = 6;
261 } else {
262 layer = 7;
263 }
264 break;
265 case 3:
266 if (neighbours[TOP] == neighbours[TOP_LEFT])
267 layer = 8;
268 else if (neighbours[TOP_RIGHT] == neighbours[TOP_LEFT])
269 layer = 9;
270 else if (neighbours[LEFT] == neighbours[TOP_LEFT])
271 layer = 10;
272 else if (neighbours[TOP_RIGHT] == neighbours[TOP])
273 layer = 11;
274 else if (neighbours[TOP] == neighbours[LEFT])
275 layer = 12;
276 else
277 layer = 13;
278 break;
279 case 4:
280 layer = 14;
281 break;
282 }
283
284 pix = acoder->get_model_sym(acoder,
285 &pctx->sec_models[layer][sub]);
286 if (pix < nlen)
287 return ref_pix[pix];
288 else
289 return decode_pixel(acoder, pctx, ref_pix, nlen, 1);
290}
291
292static int decode_region(ArithCoder *acoder, uint8_t *dst, uint8_t *rgb_pic,
293 int x, int y, int width, int height, ptrdiff_t stride,
294 ptrdiff_t rgb_stride, PixContext *pctx,
295 const uint32_t *pal)
296{
297 int i, j, p;
298 uint8_t *rgb_dst = rgb_pic + x * 3 + y * rgb_stride;
299
300 dst += x + y * stride;
301
302 for (j = 0; j < height; j++) {
303 for (i = 0; i < width; i++) {
304 if (!i && !j)
305 p = decode_pixel(acoder, pctx, NULL, 0, 0);
306 else
307 p = decode_pixel_in_context(acoder, pctx, dst + i, stride,
308 i, j, width - i - 1);
309 dst[i] = p;
310
311 if (rgb_pic)
312 AV_WB24(rgb_dst + i * 3, pal[p]);
313 }
314 dst += stride;
315 rgb_dst += rgb_stride;
316 }
317
318 return 0;
319}
320
321static void copy_rectangles(MSS12Context const *c,
322 int x, int y, int width, int height)
323{
324 int j;
325
326 if (c->last_rgb_pic)
327 for (j = y; j < y + height; j++) {
328 memcpy(c->rgb_pic + j * c->rgb_stride + x * 3,
329 c->last_rgb_pic + j * c->rgb_stride + x * 3,
330 width * 3);
331 memcpy(c->pal_pic + j * c->pal_stride + x,
332 c->last_pal_pic + j * c->pal_stride + x,
333 width);
334 }
335}
336
337static int motion_compensation(MSS12Context const *c,
338 int x, int y, int width, int height)
339{
340 if (x + c->mvX < 0 || x + c->mvX + width > c->avctx->width ||
341 y + c->mvY < 0 || y + c->mvY + height > c->avctx->height ||
342 !c->rgb_pic)
343 return -1;
344 else {
345 uint8_t *dst = c->pal_pic + x + y * c->pal_stride;
346 uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * c->rgb_stride;
347 uint8_t *src;
348 uint8_t *rgb_src;
349 int j;
350 x += c->mvX;
351 y += c->mvY;
352 if (c->last_rgb_pic) {
353 src = c->last_pal_pic + x + y * c->pal_stride;
354 rgb_src = c->last_rgb_pic + x * 3 + y * c->rgb_stride;
355 } else {
356 src = c->pal_pic + x + y * c->pal_stride;
357 rgb_src = c->rgb_pic + x * 3 + y * c->rgb_stride;
358 }
359 for (j = 0; j < height; j++) {
360 memmove(dst, src, width);
361 memmove(rgb_dst, rgb_src, width * 3);
362 dst += c->pal_stride;
363 src += c->pal_stride;
364 rgb_dst += c->rgb_stride;
365 rgb_src += c->rgb_stride;
366 }
367 }
368 return 0;
369}
370
371static int decode_region_masked(MSS12Context const *c, ArithCoder *acoder,
372 uint8_t *dst, ptrdiff_t stride, uint8_t *mask,
373 ptrdiff_t mask_stride, int x, int y,
374 int width, int height,
375 PixContext *pctx)
376{
377 int i, j, p;
378 uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * c->rgb_stride;
379
380 dst += x + y * stride;
381 mask += x + y * mask_stride;
382
383 for (j = 0; j < height; j++) {
384 for (i = 0; i < width; i++) {
385 if (c->avctx->err_recognition & AV_EF_EXPLODE &&
386 ( c->rgb_pic && mask[i] != 0x01 && mask[i] != 0x02 && mask[i] != 0x04 ||
387 !c->rgb_pic && mask[i] != 0x80 && mask[i] != 0xFF))
388 return -1;
389
390 if (mask[i] == 0x02) {
391 copy_rectangles(c, x + i, y + j, 1, 1);
392 } else if (mask[i] == 0x04) {
393 if (motion_compensation(c, x + i, y + j, 1, 1))
394 return -1;
395 } else if (mask[i] != 0x80) {
396 if (!i && !j)
397 p = decode_pixel(acoder, pctx, NULL, 0, 0);
398 else
399 p = decode_pixel_in_context(acoder, pctx, dst + i, stride,
400 i, j, width - i - 1);
401 dst[i] = p;
402 if (c->rgb_pic)
403 AV_WB24(rgb_dst + i * 3, c->pal[p]);
404 }
405 }
406 dst += stride;
407 mask += mask_stride;
408 rgb_dst += c->rgb_stride;
409 }
410
411 return 0;
412}
413
414static av_cold void slicecontext_init(SliceContext *sc,
415 int version, int full_model_syms)
416{
417 model_init(&sc->intra_region, 2, THRESH_ADAPTIVE);
418 model_init(&sc->inter_region, 2, THRESH_ADAPTIVE);
419 model_init(&sc->split_mode, 3, THRESH_HIGH);
420 model_init(&sc->edge_mode, 2, THRESH_HIGH);
421 model_init(&sc->pivot, 3, THRESH_LOW);
422
423 pixctx_init(&sc->intra_pix_ctx, 8, full_model_syms, 0);
424
425 pixctx_init(&sc->inter_pix_ctx, version ? 3 : 2,
426 full_model_syms, version ? 1 : 0);
427}
428
429void ff_mss12_slicecontext_reset(SliceContext *sc)
430{
431 model_reset(&sc->intra_region);
432 model_reset(&sc->inter_region);
433 model_reset(&sc->split_mode);
434 model_reset(&sc->edge_mode);
435 model_reset(&sc->pivot);
436 pixctx_reset(&sc->intra_pix_ctx);
437 pixctx_reset(&sc->inter_pix_ctx);
438}
439
440static int decode_pivot(SliceContext *sc, ArithCoder *acoder, int base)
441{
442 int val, inv;
443
444 inv = acoder->get_model_sym(acoder, &sc->edge_mode);
445 val = acoder->get_model_sym(acoder, &sc->pivot) + 1;
446
447 if (val > 2) {
448 if ((base + 1) / 2 - 2 <= 0)
449 return -1;
450
451 val = acoder->get_number(acoder, (base + 1) / 2 - 2) + 3;
452 }
453
454 if ((unsigned)val >= base)
455 return -1;
456
457 return inv ? base - val : val;
458}
459
460static int decode_region_intra(SliceContext *sc, ArithCoder *acoder,
461 int x, int y, int width, int height)
462{
463 MSS12Context const *c = sc->c;
464 int mode;
465
466 mode = acoder->get_model_sym(acoder, &sc->intra_region);
467
468 if (!mode) {
469 int i, j, pix, rgb_pix;
470 ptrdiff_t stride = c->pal_stride;
471 ptrdiff_t rgb_stride = c->rgb_stride;
472 uint8_t *dst = c->pal_pic + x + y * stride;
473 uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * rgb_stride;
474
475 pix = decode_pixel(acoder, &sc->intra_pix_ctx, NULL, 0, 0);
476 rgb_pix = c->pal[pix];
477 for (i = 0; i < height; i++, dst += stride, rgb_dst += rgb_stride) {
478 memset(dst, pix, width);
479 if (c->rgb_pic)
480 for (j = 0; j < width * 3; j += 3)
481 AV_WB24(rgb_dst + j, rgb_pix);
482 }
483 } else {
484 return decode_region(acoder, c->pal_pic, c->rgb_pic,
485 x, y, width, height, c->pal_stride, c->rgb_stride,
486 &sc->intra_pix_ctx, &c->pal[0]);
487 }
488
489 return 0;
490}
491
492static int decode_region_inter(SliceContext *sc, ArithCoder *acoder,
493 int x, int y, int width, int height)
494{
495 MSS12Context const *c = sc->c;
496 int mode;
497
498 mode = acoder->get_model_sym(acoder, &sc->inter_region);
499
500 if (!mode) {
501 mode = decode_pixel(acoder, &sc->inter_pix_ctx, NULL, 0, 0);
502
503 if (c->avctx->err_recognition & AV_EF_EXPLODE &&
504 ( c->rgb_pic && mode != 0x01 && mode != 0x02 && mode != 0x04 ||
505 !c->rgb_pic && mode != 0x80 && mode != 0xFF))
506 return -1;
507
508 if (mode == 0x02)
509 copy_rectangles(c, x, y, width, height);
510 else if (mode == 0x04)
511 return motion_compensation(c, x, y, width, height);
512 else if (mode != 0x80)
513 return decode_region_intra(sc, acoder, x, y, width, height);
514 } else {
515 if (decode_region(acoder, c->mask, NULL,
516 x, y, width, height, c->mask_stride, 0,
517 &sc->inter_pix_ctx, &c->pal[0]) < 0)
518 return -1;
519 return decode_region_masked(c, acoder, c->pal_pic,
520 c->pal_stride, c->mask,
521 c->mask_stride,
522 x, y, width, height,
523 &sc->intra_pix_ctx);
524 }
525
526 return 0;
527}
528
529int ff_mss12_decode_rect(SliceContext *sc, ArithCoder *acoder,
530 int x, int y, int width, int height)
531{
532 int mode, pivot;
533
534 mode = acoder->get_model_sym(acoder, &sc->split_mode);
535
536 switch (mode) {
537 case SPLIT_VERT:
538 if ((pivot = decode_pivot(sc, acoder, height)) < 1)
539 return -1;
540 if (ff_mss12_decode_rect(sc, acoder, x, y, width, pivot))
541 return -1;
542 if (ff_mss12_decode_rect(sc, acoder, x, y + pivot, width, height - pivot))
543 return -1;
544 break;
545 case SPLIT_HOR:
546 if ((pivot = decode_pivot(sc, acoder, width)) < 1)
547 return -1;
548 if (ff_mss12_decode_rect(sc, acoder, x, y, pivot, height))
549 return -1;
550 if (ff_mss12_decode_rect(sc, acoder, x + pivot, y, width - pivot, height))
551 return -1;
552 break;
553 case SPLIT_NONE:
554 if (sc->c->keyframe)
555 return decode_region_intra(sc, acoder, x, y, width, height);
556 else
557 return decode_region_inter(sc, acoder, x, y, width, height);
558 default:
559 return -1;
560 }
561
562 return 0;
563}
564
565av_cold int ff_mss12_decode_init(MSS12Context *c, int version,
566 SliceContext* sc1, SliceContext *sc2)
567{
568 AVCodecContext *avctx = c->avctx;
569 int i;
570
571 if (avctx->extradata_size < 52 + 256 * 3) {
572 av_log(avctx, AV_LOG_ERROR, "Insufficient extradata size %d\n",
573 avctx->extradata_size);
574 return AVERROR_INVALIDDATA;
575 }
576
577 if (AV_RB32(avctx->extradata) < avctx->extradata_size) {
578 av_log(avctx, AV_LOG_ERROR,
579 "Insufficient extradata size: expected %"PRIu32" got %d\n",
580 AV_RB32(avctx->extradata),
581 avctx->extradata_size);
582 return AVERROR_INVALIDDATA;
583 }
584
585 avctx->coded_width = FFMAX(AV_RB32(avctx->extradata + 20), avctx->width);
586 avctx->coded_height = FFMAX(AV_RB32(avctx->extradata + 24), avctx->height);
587 if (avctx->coded_width > 4096 || avctx->coded_height > 4096) {
588 av_log(avctx, AV_LOG_ERROR, "Frame dimensions %dx%d too large",
589 avctx->coded_width, avctx->coded_height);
590 return AVERROR_INVALIDDATA;
591 }
592 if (avctx->coded_width < 1 || avctx->coded_height < 1) {
593 av_log(avctx, AV_LOG_ERROR, "Frame dimensions %dx%d too small",
594 avctx->coded_width, avctx->coded_height);
595 return AVERROR_INVALIDDATA;
596 }
597
598 av_log(avctx, AV_LOG_DEBUG, "Encoder version %"PRIu32".%"PRIu32"\n",
599 AV_RB32(avctx->extradata + 4), AV_RB32(avctx->extradata + 8));
600 if (version != AV_RB32(avctx->extradata + 4) > 1) {
601 av_log(avctx, AV_LOG_ERROR,
602 "Header version doesn't match codec tag\n");
603 return -1;
604 }
605
606 c->free_colours = AV_RB32(avctx->extradata + 48);
607 if ((unsigned)c->free_colours > 256) {
608 av_log(avctx, AV_LOG_ERROR,
609 "Incorrect number of changeable palette entries: %d\n",
610 c->free_colours);
611 return AVERROR_INVALIDDATA;
612 }
613 av_log(avctx, AV_LOG_DEBUG, "%d free colour(s)\n", c->free_colours);
614
615 av_log(avctx, AV_LOG_DEBUG, "Display dimensions %"PRIu32"x%"PRIu32"\n",
616 AV_RB32(avctx->extradata + 12), AV_RB32(avctx->extradata + 16));
617 av_log(avctx, AV_LOG_DEBUG, "Coded dimensions %dx%d\n",
618 avctx->coded_width, avctx->coded_height);
619 av_log(avctx, AV_LOG_DEBUG, "%g frames per second\n",
620 av_int2float(AV_RB32(avctx->extradata + 28)));
621 av_log(avctx, AV_LOG_DEBUG, "Bitrate %"PRIu32" bps\n",
622 AV_RB32(avctx->extradata + 32));
623 av_log(avctx, AV_LOG_DEBUG, "Max. lead time %g ms\n",
624 av_int2float(AV_RB32(avctx->extradata + 36)));
625 av_log(avctx, AV_LOG_DEBUG, "Max. lag time %g ms\n",
626 av_int2float(AV_RB32(avctx->extradata + 40)));
627 av_log(avctx, AV_LOG_DEBUG, "Max. seek time %g ms\n",
628 av_int2float(AV_RB32(avctx->extradata + 44)));
629
630 if (version) {
631 if (avctx->extradata_size < 60 + 256 * 3) {
632 av_log(avctx, AV_LOG_ERROR,
633 "Insufficient extradata size %d for v2\n",
634 avctx->extradata_size);
635 return AVERROR_INVALIDDATA;
636 }
637
638 c->slice_split = AV_RB32(avctx->extradata + 52);
639 av_log(avctx, AV_LOG_DEBUG, "Slice split %d\n", c->slice_split);
640
641 c->full_model_syms = AV_RB32(avctx->extradata + 56);
642 if (c->full_model_syms < 2 || c->full_model_syms > 256) {
643 av_log(avctx, AV_LOG_ERROR,
644 "Incorrect number of used colours %d\n",
645 c->full_model_syms);
646 return AVERROR_INVALIDDATA;
647 }
648 av_log(avctx, AV_LOG_DEBUG, "Used colours %d\n",
649 c->full_model_syms);
650 } else {
651 c->slice_split = 0;
652 c->full_model_syms = 256;
653 }
654
655 for (i = 0; i < 256; i++)
656 c->pal[i] = 0xFFU << 24 | AV_RB24(avctx->extradata + 52 +
657 (version ? 8 : 0) + i * 3);
658
659 c->mask_stride = FFALIGN(avctx->width, 16);
660 c->mask = av_malloc_array(c->mask_stride, avctx->height);
661 if (!c->mask) {
662 av_log(avctx, AV_LOG_ERROR, "Cannot allocate mask plane\n");
663 return AVERROR(ENOMEM);
664 }
665
666 sc1->c = c;
667 slicecontext_init(sc1, version, c->full_model_syms);
668 if (c->slice_split) {
669 sc2->c = c;
670 slicecontext_init(sc2, version, c->full_model_syms);
671 }
672 c->corrupted = 1;
673
674 return 0;
675}
676
677av_cold int ff_mss12_decode_end(MSS12Context *c)
678{
679 av_freep(&c->mask);
680
681 return 0;
682}
683
generated by cgit at 2024-05-17 06:10:14 (GMT)