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path: root/libavcodec/pixlet.c (plain)
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1/*
2 * Apple Pixlet decoder
3 * Copyright (c) 2016 Paul B Mahol
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include <stdint.h>
23
24#include "libavutil/imgutils.h"
25#include "libavutil/intmath.h"
26#include "libavutil/opt.h"
27
28#include "avcodec.h"
29#include "bytestream.h"
30#include "get_bits.h"
31#include "unary.h"
32#include "internal.h"
33#include "thread.h"
34
35#define NB_LEVELS 4
36
37#define H 0
38#define V 1
39
40typedef struct SubBand {
41 unsigned width, height;
42 unsigned size;
43 unsigned x, y;
44} SubBand;
45
46typedef struct PixletContext {
47 AVClass *class;
48
49 GetByteContext gb;
50 GetBitContext gbit;
51
52 int levels;
53 int depth;
54 int h, w;
55
56 int16_t *filter[2];
57 int16_t *prediction;
58 int64_t scaling[4][2][NB_LEVELS];
59 SubBand band[4][NB_LEVELS * 3 + 1];
60} PixletContext;
61
62static int init_decoder(AVCodecContext *avctx)
63{
64 PixletContext *ctx = avctx->priv_data;
65 int i, plane;
66
67 ctx->filter[0] = av_malloc_array(ctx->h, sizeof(int16_t));
68 ctx->filter[1] = av_malloc_array(FFMAX(ctx->h, ctx->w) + 16, sizeof(int16_t));
69 ctx->prediction = av_malloc_array((ctx->w >> NB_LEVELS), sizeof(int16_t));
70 if (!ctx->filter[0] || !ctx->filter[1] || !ctx->prediction)
71 return AVERROR(ENOMEM);
72
73 for (plane = 0; plane < 3; plane++) {
74 unsigned shift = plane > 0;
75 unsigned w = ctx->w >> shift;
76 unsigned h = ctx->h >> shift;
77
78 ctx->band[plane][0].width = w >> NB_LEVELS;
79 ctx->band[plane][0].height = h >> NB_LEVELS;
80 ctx->band[plane][0].size = (w >> NB_LEVELS) * (h >> NB_LEVELS);
81
82 for (i = 0; i < NB_LEVELS * 3; i++) {
83 unsigned scale = ctx->levels - (i / 3);
84
85 ctx->band[plane][i + 1].width = w >> scale;
86 ctx->band[plane][i + 1].height = h >> scale;
87 ctx->band[plane][i + 1].size = (w >> scale) * (h >> scale);
88
89 ctx->band[plane][i + 1].x = (w >> scale) * (((i + 1) % 3) != 2);
90 ctx->band[plane][i + 1].y = (h >> scale) * (((i + 1) % 3) != 1);
91 }
92 }
93
94 return 0;
95}
96
97static void free_buffers(AVCodecContext *avctx)
98{
99 PixletContext *ctx = avctx->priv_data;
100
101 av_freep(&ctx->filter[0]);
102 av_freep(&ctx->filter[1]);
103 av_freep(&ctx->prediction);
104}
105
106static av_cold int pixlet_close(AVCodecContext *avctx)
107{
108 PixletContext *ctx = avctx->priv_data;
109 free_buffers(avctx);
110 ctx->w = 0;
111 ctx->h = 0;
112 return 0;
113}
114
115static av_cold int pixlet_init(AVCodecContext *avctx)
116{
117 avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
118 avctx->color_range = AVCOL_RANGE_JPEG;
119 return 0;
120}
121
122static int read_low_coeffs(AVCodecContext *avctx, int16_t *dst, int size, int width, ptrdiff_t stride)
123{
124 PixletContext *ctx = avctx->priv_data;
125 GetBitContext *b = &ctx->gbit;
126 unsigned cnt1, nbits, k, j = 0, i = 0;
127 int64_t value, state = 3;
128 int rlen, escape, flag = 0;
129
130 while (i < size) {
131 nbits = FFMIN(ff_clz((state >> 8) + 3) ^ 0x1F, 14);
132
133 cnt1 = get_unary(b, 0, 8);
134 if (cnt1 < 8) {
135 value = show_bits(b, nbits);
136 if (value <= 1) {
137 skip_bits(b, nbits - 1);
138 escape = ((1 << nbits) - 1) * cnt1;
139 } else {
140 skip_bits(b, nbits);
141 escape = value + ((1 << nbits) - 1) * cnt1 - 1;
142 }
143 } else {
144 escape = get_bits(b, 16);
145 }
146
147 value = -((escape + flag) & 1) | 1;
148 dst[j++] = value * ((escape + flag + 1) >> 1);
149 i++;
150 if (j == width) {
151 j = 0;
152 dst += stride;
153 }
154 state = 120 * (escape + flag) + state - (120 * state >> 8);
155 flag = 0;
156
157 if (state * 4 > 0xFF || i >= size)
158 continue;
159
160 nbits = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;
161 escape = av_mod_uintp2(16383, nbits);
162 cnt1 = get_unary(b, 0, 8);
163 if (cnt1 > 7) {
164 rlen = get_bits(b, 16);
165 } else {
166 value = show_bits(b, nbits);
167 if (value > 1) {
168 skip_bits(b, nbits);
169 rlen = value + escape * cnt1 - 1;
170 } else {
171 skip_bits(b, nbits - 1);
172 rlen = escape * cnt1;
173 }
174 }
175
176 if (rlen > size - i)
177 return AVERROR_INVALIDDATA;
178 i += rlen;
179
180 for (k = 0; k < rlen; k++) {
181 dst[j++] = 0;
182 if (j == width) {
183 j = 0;
184 dst += stride;
185 }
186 }
187
188 state = 0;
189 flag = rlen < 0xFFFF ? 1 : 0;
190 }
191
192 align_get_bits(b);
193 return get_bits_count(b) >> 3;
194}
195
196static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, int size,
197 int c, int a, int d,
198 int width, ptrdiff_t stride)
199{
200 PixletContext *ctx = avctx->priv_data;
201 GetBitContext *b = &ctx->gbit;
202 unsigned cnt1, shbits, rlen, nbits, length, i = 0, j = 0, k;
203 int ret, escape, pfx, value, yflag, xflag, flag = 0;
204 int64_t state = 3, tmp;
205
206 if ((ret = init_get_bits8(b, src, bytestream2_get_bytes_left(&ctx->gb))) < 0)
207 return ret;
208
209 if ((a >= 0) + (a ^ (a >> 31)) - (a >> 31) != 1) {
210 nbits = 33 - ff_clz((a >= 0) + (a ^ (a >> 31)) - (a >> 31) - 1);
211 if (nbits > 16)
212 return AVERROR_INVALIDDATA;
213 } else {
214 nbits = 1;
215 }
216
217 length = 25 - nbits;
218
219 while (i < size) {
220 if (state >> 8 != -3) {
221 value = ff_clz((state >> 8) + 3) ^ 0x1F;
222 } else {
223 value = -1;
224 }
225
226 cnt1 = get_unary(b, 0, length);
227
228 if (cnt1 >= length) {
229 cnt1 = get_bits(b, nbits);
230 } else {
231 pfx = 14 + ((((uint64_t)(value - 14)) >> 32) & (value - 14));
232 cnt1 *= (1 << pfx) - 1;
233 shbits = show_bits(b, pfx);
234 if (shbits <= 1) {
235 skip_bits(b, pfx - 1);
236 } else {
237 skip_bits(b, pfx);
238 cnt1 += shbits - 1;
239 }
240 }
241
242 xflag = flag + cnt1;
243 yflag = xflag;
244
245 if (flag + cnt1 == 0) {
246 value = 0;
247 } else {
248 xflag &= 1u;
249 tmp = (int64_t)c * ((yflag + 1) >> 1) + (c >> 1);
250 value = xflag + (tmp ^ -xflag);
251 }
252
253 i++;
254 dst[j++] = value;
255 if (j == width) {
256 j = 0;
257 dst += stride;
258 }
259 state += (int64_t)d * yflag - (d * state >> 8);
260
261 flag = 0;
262
263 if (state * 4 > 0xFF || i >= size)
264 continue;
265
266 pfx = ((state + 8) >> 5) + (state ? ff_clz(state): 32) - 24;
267 escape = av_mod_uintp2(16383, pfx);
268 cnt1 = get_unary(b, 0, 8);
269 if (cnt1 < 8) {
270 if (pfx < 1 || pfx > 25)
271 return AVERROR_INVALIDDATA;
272 value = show_bits(b, pfx);
273 if (value > 1) {
274 skip_bits(b, pfx);
275 rlen = value + escape * cnt1 - 1;
276 } else {
277 skip_bits(b, pfx - 1);
278 rlen = escape * cnt1;
279 }
280 } else {
281 if (get_bits1(b))
282 value = get_bits(b, 16);
283 else
284 value = get_bits(b, 8);
285
286 rlen = value + 8 * escape;
287 }
288
289 if (rlen > 0xFFFF || i + rlen > size)
290 return AVERROR_INVALIDDATA;
291 i += rlen;
292
293 for (k = 0; k < rlen; k++) {
294 dst[j++] = 0;
295 if (j == width) {
296 j = 0;
297 dst += stride;
298 }
299 }
300
301 state = 0;
302 flag = rlen < 0xFFFF ? 1 : 0;
303 }
304
305 align_get_bits(b);
306 return get_bits_count(b) >> 3;
307}
308
309static int read_highpass(AVCodecContext *avctx, uint8_t *ptr, int plane, AVFrame *frame)
310{
311 PixletContext *ctx = avctx->priv_data;
312 ptrdiff_t stride = frame->linesize[plane] / 2;
313 int i, ret;
314
315 for (i = 0; i < ctx->levels * 3; i++) {
316 int32_t a = bytestream2_get_be32(&ctx->gb);
317 int32_t b = bytestream2_get_be32(&ctx->gb);
318 int32_t c = bytestream2_get_be32(&ctx->gb);
319 int32_t d = bytestream2_get_be32(&ctx->gb);
320 int16_t *dest = (int16_t *)frame->data[plane] + ctx->band[plane][i + 1].x +
321 stride * ctx->band[plane][i + 1].y;
322 unsigned size = ctx->band[plane][i + 1].size;
323 uint32_t magic;
324
325 magic = bytestream2_get_be32(&ctx->gb);
326 if (magic != 0xDEADBEEF) {
327 av_log(avctx, AV_LOG_ERROR, "wrong magic number: 0x%08"PRIX32
328 " for plane %d, band %d\n", magic, plane, i);
329 return AVERROR_INVALIDDATA;
330 }
331
332 ret = read_high_coeffs(avctx, ptr + bytestream2_tell(&ctx->gb), dest, size,
333 c, (b >= FFABS(a)) ? b : a, d,
334 ctx->band[plane][i + 1].width, stride);
335 if (ret < 0) {
336 av_log(avctx, AV_LOG_ERROR, "error in highpass coefficients for plane %d, band %d\n", plane, i);
337 return ret;
338 }
339 bytestream2_skip(&ctx->gb, ret);
340 }
341
342 return 0;
343}
344
345static void lowpass_prediction(int16_t *dst, int16_t *pred, int width, int height, ptrdiff_t stride)
346{
347 int16_t val;
348 int i, j;
349
350 memset(pred, 0, width * sizeof(*pred));
351
352 for (i = 0; i < height; i++) {
353 val = pred[0] + dst[0];
354 dst[0] = pred[0] = val;
355 for (j = 1; j < width; j++) {
356 val = pred[j] + dst[j];
357 dst[j] = pred[j] = val;
358 dst[j] += dst[j-1];
359 }
360 dst += stride;
361 }
362}
363
364static void filterfn(int16_t *dest, int16_t *tmp, unsigned size, int64_t scale)
365{
366 int16_t *low, *high, *ll, *lh, *hl, *hh;
367 int hsize, i, j;
368 int64_t value;
369
370 hsize = size >> 1;
371 low = tmp + 4;
372 high = &low[hsize + 8];
373
374 memcpy(low, dest, size);
375 memcpy(high, dest + hsize, size);
376
377 ll = &low[hsize];
378 lh = &low[hsize];
379 hl = &high[hsize];
380 hh = hl;
381 for (i = 4, j = 2; i; i--, j++, ll--, hh++, lh++, hl--) {
382 low[i - 5] = low[j - 1];
383 lh[0] = ll[-1];
384 high[i - 5] = high[j - 2];
385 hh[0] = hl[-2];
386 }
387
388 for (i = 0; i < hsize; i++) {
389 value = (int64_t) low [i + 1] * -INT64_C(325392907) +
390 (int64_t) low [i + 0] * INT64_C(3687786320) +
391 (int64_t) low [i - 1] * -INT64_C(325392907) +
392 (int64_t) high[i + 0] * INT64_C(1518500249) +
393 (int64_t) high[i - 1] * INT64_C(1518500249);
394 dest[i * 2] = av_clip_int16(((value >> 32) * scale) >> 32);
395 }
396
397 for (i = 0; i < hsize; i++) {
398 value = (int64_t) low [i + 2] * -INT64_C(65078576) +
399 (int64_t) low [i + 1] * INT64_C(1583578880) +
400 (int64_t) low [i + 0] * INT64_C(1583578880) +
401 (int64_t) low [i - 1] * -INT64_C(65078576) +
402 (int64_t) high[i + 1] * INT64_C(303700064) +
403 (int64_t) high[i + 0] * -INT64_C(3644400640) +
404 (int64_t) high[i - 1] * INT64_C(303700064);
405 dest[i * 2 + 1] = av_clip_int16(((value >> 32) * scale) >> 32);
406 }
407}
408
409static void reconstruction(AVCodecContext *avctx,
410 int16_t *dest, unsigned width, unsigned height, ptrdiff_t stride, int nb_levels,
411 int64_t *scaling_H, int64_t *scaling_V)
412{
413 PixletContext *ctx = avctx->priv_data;
414 unsigned scaled_width, scaled_height;
415 int64_t scale_H, scale_V;
416 int16_t *ptr, *tmp;
417 int i, j, k;
418
419 scaled_height = height >> nb_levels;
420 scaled_width = width >> nb_levels;
421 tmp = ctx->filter[0];
422
423 for (i = 0; i < nb_levels; i++) {
424 scaled_width <<= 1;
425 scaled_height <<= 1;
426 scale_H = scaling_H[i];
427 scale_V = scaling_V[i];
428
429 ptr = dest;
430 for (j = 0; j < scaled_height; j++) {
431 filterfn(ptr, ctx->filter[1], scaled_width, scale_V);
432 ptr += stride;
433 }
434
435 for (j = 0; j < scaled_width; j++) {
436 ptr = dest + j;
437 for (k = 0; k < scaled_height; k++) {
438 tmp[k] = *ptr;
439 ptr += stride;
440 }
441
442 filterfn(tmp, ctx->filter[1], scaled_height, scale_H);
443
444 ptr = dest + j;
445 for (k = 0; k < scaled_height; k++) {
446 *ptr = tmp[k];
447 ptr += stride;
448 }
449 }
450 }
451}
452
453static void postprocess_luma(AVFrame *frame, int w, int h, int depth)
454{
455 uint16_t *dsty = (uint16_t *)frame->data[0];
456 int16_t *srcy = (int16_t *)frame->data[0];
457 ptrdiff_t stridey = frame->linesize[0] / 2;
458 int i, j;
459
460 for (j = 0; j < h; j++) {
461 for (i = 0; i < w; i++) {
462 if (srcy[i] <= 0)
463 dsty[i] = 0;
464 else if (srcy[i] > ((1 << depth) - 1))
465 dsty[i] = 65535;
466 else
467 dsty[i] = ((int64_t) srcy[i] * srcy[i] * 65535) /
468 ((1 << depth) - 1) / ((1 << depth) - 1);
469 }
470 dsty += stridey;
471 srcy += stridey;
472 }
473}
474
475static void postprocess_chroma(AVFrame *frame, int w, int h, int depth)
476{
477 uint16_t *dstu = (uint16_t *)frame->data[1];
478 uint16_t *dstv = (uint16_t *)frame->data[2];
479 int16_t *srcu = (int16_t *)frame->data[1];
480 int16_t *srcv = (int16_t *)frame->data[2];
481 ptrdiff_t strideu = frame->linesize[1] / 2;
482 ptrdiff_t stridev = frame->linesize[2] / 2;
483 const unsigned add = 1 << (depth - 1);
484 const unsigned shift = 16 - depth;
485 int i, j;
486
487 for (j = 0; j < h; j++) {
488 for (i = 0; i < w; i++) {
489 dstu[i] = av_clip_uintp2_c(add + srcu[i], depth) << shift;
490 dstv[i] = av_clip_uintp2_c(add + srcv[i], depth) << shift;
491 }
492 dstu += strideu;
493 dstv += stridev;
494 srcu += strideu;
495 srcv += stridev;
496 }
497}
498
499static int decode_plane(AVCodecContext *avctx, int plane, AVPacket *avpkt, AVFrame *frame)
500{
501 PixletContext *ctx = avctx->priv_data;
502 ptrdiff_t stride = frame->linesize[plane] / 2;
503 unsigned shift = plane > 0;
504 int16_t *dst;
505 int i, ret;
506
507 for (i = ctx->levels - 1; i >= 0; i--) {
508 int32_t h = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
509 int32_t v = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
510
511 if (!h || !v)
512 return AVERROR_INVALIDDATA;
513
514 ctx->scaling[plane][H][i] = (1000000ULL << 32) / h;
515 ctx->scaling[plane][V][i] = (1000000ULL << 32) / v;
516 }
517
518 bytestream2_skip(&ctx->gb, 4);
519
520 dst = (int16_t *)frame->data[plane];
521 dst[0] = sign_extend(bytestream2_get_be16(&ctx->gb), 16);
522
523 if ((ret = init_get_bits8(&ctx->gbit, avpkt->data + bytestream2_tell(&ctx->gb),
524 bytestream2_get_bytes_left(&ctx->gb))) < 0)
525 return ret;
526
527 ret = read_low_coeffs(avctx, dst + 1, ctx->band[plane][0].width - 1, ctx->band[plane][0].width - 1, 0);
528 if (ret < 0) {
529 av_log(avctx, AV_LOG_ERROR, "error in lowpass coefficients for plane %d, top row\n", plane);
530 return ret;
531 }
532
533 ret = read_low_coeffs(avctx, dst + stride, ctx->band[plane][0].height - 1, 1, stride);
534 if (ret < 0) {
535 av_log(avctx, AV_LOG_ERROR, "error in lowpass coefficients for plane %d, left column\n", plane);
536 return ret;
537 }
538
539 ret = read_low_coeffs(avctx, dst + stride + 1,
540 (ctx->band[plane][0].width - 1) * (ctx->band[plane][0].height - 1),
541 ctx->band[plane][0].width - 1, stride);
542 if (ret < 0) {
543 av_log(avctx, AV_LOG_ERROR, "error in lowpass coefficients for plane %d, rest\n", plane);
544 return ret;
545 }
546
547 bytestream2_skip(&ctx->gb, ret);
548 if (bytestream2_get_bytes_left(&ctx->gb) <= 0) {
549 av_log(avctx, AV_LOG_ERROR, "no bytes left\n");
550 return AVERROR_INVALIDDATA;
551 }
552
553 ret = read_highpass(avctx, avpkt->data, plane, frame);
554 if (ret < 0)
555 return ret;
556
557 lowpass_prediction(dst, ctx->prediction,
558 ctx->band[plane][0].width, ctx->band[plane][0].height, stride);
559
560 reconstruction(avctx, (int16_t *)frame->data[plane], ctx->w >> shift, ctx->h >> shift,
561 stride, NB_LEVELS, ctx->scaling[plane][H], ctx->scaling[plane][V]);
562
563 return 0;
564}
565
566static int pixlet_decode_frame(AVCodecContext *avctx, void *data,
567 int *got_frame, AVPacket *avpkt)
568{
569 PixletContext *ctx = avctx->priv_data;
570 int i, w, h, width, height, ret, version;
571 AVFrame *p = data;
572 ThreadFrame frame = { .f = data };
573 uint32_t pktsize;
574
575 bytestream2_init(&ctx->gb, avpkt->data, avpkt->size);
576
577 pktsize = bytestream2_get_be32(&ctx->gb);
578 if (pktsize <= 44 || pktsize - 4 > bytestream2_get_bytes_left(&ctx->gb)) {
579 av_log(avctx, AV_LOG_ERROR, "Invalid packet size %"PRIu32"\n", pktsize);
580 return AVERROR_INVALIDDATA;
581 }
582
583 version = bytestream2_get_le32(&ctx->gb);
584 if (version != 1)
585 avpriv_request_sample(avctx, "Version %d", version);
586
587 bytestream2_skip(&ctx->gb, 4);
588 if (bytestream2_get_be32(&ctx->gb) != 1)
589 return AVERROR_INVALIDDATA;
590 bytestream2_skip(&ctx->gb, 4);
591
592 width = bytestream2_get_be32(&ctx->gb);
593 height = bytestream2_get_be32(&ctx->gb);
594
595 w = FFALIGN(width, 1 << (NB_LEVELS + 1));
596 h = FFALIGN(height, 1 << (NB_LEVELS + 1));
597
598 ctx->levels = bytestream2_get_be32(&ctx->gb);
599 if (ctx->levels != NB_LEVELS)
600 return AVERROR_INVALIDDATA;
601 ctx->depth = bytestream2_get_be32(&ctx->gb);
602 if (ctx->depth < 8 || ctx->depth > 15) {
603 avpriv_request_sample(avctx, "Depth %d", ctx->depth);
604 return AVERROR_INVALIDDATA;
605 }
606
607 ret = ff_set_dimensions(avctx, w, h);
608 if (ret < 0)
609 return ret;
610 avctx->width = width;
611 avctx->height = height;
612
613 if (ctx->w != w || ctx->h != h) {
614 free_buffers(avctx);
615 ctx->w = w;
616 ctx->h = h;
617
618 ret = init_decoder(avctx);
619 if (ret < 0) {
620 free_buffers(avctx);
621 ctx->w = 0;
622 ctx->h = 0;
623 return ret;
624 }
625 }
626
627 bytestream2_skip(&ctx->gb, 8);
628
629 p->pict_type = AV_PICTURE_TYPE_I;
630 p->key_frame = 1;
631 p->color_range = AVCOL_RANGE_JPEG;
632
633 ret = ff_thread_get_buffer(avctx, &frame, 0);
634 if (ret < 0)
635 return ret;
636
637 for (i = 0; i < 3; i++) {
638 ret = decode_plane(avctx, i, avpkt, frame.f);
639 if (ret < 0)
640 return ret;
641 if (avctx->flags & AV_CODEC_FLAG_GRAY)
642 break;
643 }
644
645 postprocess_luma(frame.f, ctx->w, ctx->h, ctx->depth);
646 postprocess_chroma(frame.f, ctx->w >> 1, ctx->h >> 1, ctx->depth);
647
648 *got_frame = 1;
649
650 return pktsize;
651}
652
653#if HAVE_THREADS
654static int pixlet_init_thread_copy(AVCodecContext *avctx)
655{
656 PixletContext *ctx = avctx->priv_data;
657
658 ctx->filter[0] = NULL;
659 ctx->filter[1] = NULL;
660 ctx->prediction = NULL;
661 ctx->w = ctx->h = 0;
662
663 return 0;
664}
665#endif
666
667AVCodec ff_pixlet_decoder = {
668 .name = "pixlet",
669 .long_name = NULL_IF_CONFIG_SMALL("Apple Pixlet"),
670 .type = AVMEDIA_TYPE_VIDEO,
671 .id = AV_CODEC_ID_PIXLET,
672 .init = pixlet_init,
673 .init_thread_copy = ONLY_IF_THREADS_ENABLED(pixlet_init_thread_copy),
674 .close = pixlet_close,
675 .decode = pixlet_decode_frame,
676 .priv_data_size = sizeof(PixletContext),
677 .capabilities = AV_CODEC_CAP_DR1 |
678 AV_CODEC_CAP_FRAME_THREADS,
679 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
680 FF_CODEC_CAP_INIT_CLEANUP,
681};
682
generated by cgit at 2024-05-17 03:08:35 (GMT)