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1/*
2 * JPEG 2000 decoding support via OpenJPEG
3 * Copyright (c) 2009 Jaikrishnan Menon <realityman@gmx.net>
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/**
23 * @file
24 * JPEG 2000 decoder using libopenjpeg
25 */
26
27#include "libavutil/common.h"
28#include "libavutil/imgutils.h"
29#include "libavutil/intreadwrite.h"
30#include "libavutil/opt.h"
31#include "libavutil/pixfmt.h"
32
33#include "avcodec.h"
34#include "internal.h"
35#include "thread.h"
36
37#if HAVE_OPENJPEG_2_1_OPENJPEG_H
38# include <openjpeg-2.1/openjpeg.h>
39#elif HAVE_OPENJPEG_2_0_OPENJPEG_H
40# include <openjpeg-2.0/openjpeg.h>
41#elif HAVE_OPENJPEG_1_5_OPENJPEG_H
42# include <openjpeg-1.5/openjpeg.h>
43#else
44# include <openjpeg.h>
45#endif
46
47#if HAVE_OPENJPEG_2_1_OPENJPEG_H || HAVE_OPENJPEG_2_0_OPENJPEG_H
48# define OPENJPEG_MAJOR_VERSION 2
49# define OPJ(x) OPJ_##x
50#else
51# define OPENJPEG_MAJOR_VERSION 1
52# define OPJ(x) x
53#endif
54
55#define JP2_SIG_TYPE 0x6A502020
56#define JP2_SIG_VALUE 0x0D0A870A
57
58// pix_fmts with lower bpp have to be listed before
59// similar pix_fmts with higher bpp.
60#define RGB_PIXEL_FORMATS AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, \
61 AV_PIX_FMT_RGB48, AV_PIX_FMT_RGBA64
62
63#define GRAY_PIXEL_FORMATS AV_PIX_FMT_GRAY8, AV_PIX_FMT_YA8, \
64 AV_PIX_FMT_GRAY16, AV_PIX_FMT_YA16
65
66#define YUV_PIXEL_FORMATS AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVA420P, \
67 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P, \
68 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, \
69 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, \
70 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, \
71 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, \
72 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, \
73 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, \
74 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, \
75 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, \
76 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16
77
78#define XYZ_PIXEL_FORMATS AV_PIX_FMT_XYZ12
79
80static const enum AVPixelFormat libopenjpeg_rgb_pix_fmts[] = {
81 RGB_PIXEL_FORMATS
82};
83static const enum AVPixelFormat libopenjpeg_gray_pix_fmts[] = {
84 GRAY_PIXEL_FORMATS
85};
86static const enum AVPixelFormat libopenjpeg_yuv_pix_fmts[] = {
87 YUV_PIXEL_FORMATS
88};
89static const enum AVPixelFormat libopenjpeg_all_pix_fmts[] = {
90 RGB_PIXEL_FORMATS, GRAY_PIXEL_FORMATS, YUV_PIXEL_FORMATS, XYZ_PIXEL_FORMATS
91};
92
93typedef struct LibOpenJPEGContext {
94 AVClass *class;
95 opj_dparameters_t dec_params;
96#if OPENJPEG_MAJOR_VERSION == 1
97 opj_event_mgr_t event_mgr;
98#endif // OPENJPEG_MAJOR_VERSION == 1
99 int lowqual;
100} LibOpenJPEGContext;
101
102static void error_callback(const char *msg, void *data)
103{
104 av_log(data, AV_LOG_ERROR, "%s", msg);
105}
106
107static void warning_callback(const char *msg, void *data)
108{
109 av_log(data, AV_LOG_WARNING, "%s", msg);
110}
111
112static void info_callback(const char *msg, void *data)
113{
114 av_log(data, AV_LOG_DEBUG, "%s", msg);
115}
116
117#if OPENJPEG_MAJOR_VERSION == 2
118typedef struct BufferReader {
119 int pos;
120 int size;
121 const uint8_t *buffer;
122} BufferReader;
123
124static OPJ_SIZE_T stream_read(void *out_buffer, OPJ_SIZE_T nb_bytes, void *user_data)
125{
126 BufferReader *reader = user_data;
127 int remaining;
128
129 if (reader->pos == reader->size) {
130 return (OPJ_SIZE_T)-1;
131 }
132 remaining = reader->size - reader->pos;
133 if (nb_bytes > remaining) {
134 nb_bytes = remaining;
135 }
136 memcpy(out_buffer, reader->buffer + reader->pos, nb_bytes);
137 reader->pos += (int)nb_bytes;
138 return nb_bytes;
139}
140
141static OPJ_OFF_T stream_skip(OPJ_OFF_T nb_bytes, void *user_data)
142{
143 BufferReader *reader = user_data;
144 if (nb_bytes < 0) {
145 if (reader->pos == 0) {
146 return (OPJ_SIZE_T)-1;
147 }
148 if (nb_bytes + reader->pos < 0) {
149 nb_bytes = -reader->pos;
150 }
151 } else {
152 int remaining;
153
154 if (reader->pos == reader->size) {
155 return (OPJ_SIZE_T)-1;
156 }
157 remaining = reader->size - reader->pos;
158 if (nb_bytes > remaining) {
159 nb_bytes = remaining;
160 }
161 }
162 reader->pos += (int)nb_bytes;
163 return nb_bytes;
164}
165
166static OPJ_BOOL stream_seek(OPJ_OFF_T nb_bytes, void *user_data)
167{
168 BufferReader *reader = user_data;
169 if (nb_bytes < 0 || nb_bytes > reader->size) {
170 return OPJ_FALSE;
171 }
172 reader->pos = (int)nb_bytes;
173 return OPJ_TRUE;
174}
175#endif // OPENJPEG_MAJOR_VERSION == 2
176
177static inline int libopenjpeg_matches_pix_fmt(const opj_image_t *image, enum AVPixelFormat pix_fmt)
178{
179 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
180 int match = 1;
181
182 if (desc->nb_components != image->numcomps) {
183 return 0;
184 }
185
186 switch (desc->nb_components) {
187 case 4:
188 match = match &&
189 desc->comp[3].depth >= image->comps[3].prec &&
190 1 == image->comps[3].dx &&
191 1 == image->comps[3].dy;
192 case 3:
193 match = match &&
194 desc->comp[2].depth >= image->comps[2].prec &&
195 1 << desc->log2_chroma_w == image->comps[2].dx &&
196 1 << desc->log2_chroma_h == image->comps[2].dy;
197 case 2:
198 match = match &&
199 desc->comp[1].depth >= image->comps[1].prec &&
200 1 << desc->log2_chroma_w == image->comps[1].dx &&
201 1 << desc->log2_chroma_h == image->comps[1].dy;
202 case 1:
203 match = match &&
204 desc->comp[0].depth >= image->comps[0].prec &&
205 1 == image->comps[0].dx &&
206 1 == image->comps[0].dy;
207 default:
208 break;
209 }
210
211 return match;
212}
213
214static inline enum AVPixelFormat libopenjpeg_guess_pix_fmt(const opj_image_t *image) {
215 int index;
216 const enum AVPixelFormat *possible_fmts = NULL;
217 int possible_fmts_nb = 0;
218
219 switch (image->color_space) {
220 case OPJ(CLRSPC_SRGB):
221 possible_fmts = libopenjpeg_rgb_pix_fmts;
222 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_rgb_pix_fmts);
223 break;
224 case OPJ(CLRSPC_GRAY):
225 possible_fmts = libopenjpeg_gray_pix_fmts;
226 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_gray_pix_fmts);
227 break;
228 case OPJ(CLRSPC_SYCC):
229 possible_fmts = libopenjpeg_yuv_pix_fmts;
230 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_yuv_pix_fmts);
231 break;
232 default:
233 possible_fmts = libopenjpeg_all_pix_fmts;
234 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_all_pix_fmts);
235 break;
236 }
237
238 for (index = 0; index < possible_fmts_nb; ++index)
239 if (libopenjpeg_matches_pix_fmt(image, possible_fmts[index])) {
240 return possible_fmts[index];
241 }
242
243 return AV_PIX_FMT_NONE;
244}
245
246static inline int libopenjpeg_ispacked(enum AVPixelFormat pix_fmt)
247{
248 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
249 int i, component_plane;
250
251 if (pix_fmt == AV_PIX_FMT_GRAY16)
252 return 0;
253
254 component_plane = desc->comp[0].plane;
255 for (i = 1; i < desc->nb_components; i++)
256 if (component_plane != desc->comp[i].plane)
257 return 0;
258 return 1;
259}
260
261static inline void libopenjpeg_copy_to_packed8(AVFrame *picture, opj_image_t *image) {
262 uint8_t *img_ptr;
263 int index, x, y, c;
264 for (y = 0; y < picture->height; y++) {
265 index = y * picture->width;
266 img_ptr = picture->data[0] + y * picture->linesize[0];
267 for (x = 0; x < picture->width; x++, index++)
268 for (c = 0; c < image->numcomps; c++)
269 *img_ptr++ = 0x80 * image->comps[c].sgnd + image->comps[c].data[index];
270 }
271}
272
273static inline void libopenjpeg_copy_to_packed16(AVFrame *picture, opj_image_t *image) {
274 uint16_t *img_ptr;
275 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(picture->format);
276 int index, x, y, c;
277 int adjust[4];
278 for (x = 0; x < image->numcomps; x++)
279 adjust[x] = FFMAX(FFMIN(desc->comp[x].depth - image->comps[x].prec, 8), 0) + desc->comp[x].shift;
280
281 for (y = 0; y < picture->height; y++) {
282 index = y * picture->width;
283 img_ptr = (uint16_t *) (picture->data[0] + y * picture->linesize[0]);
284 for (x = 0; x < picture->width; x++, index++)
285 for (c = 0; c < image->numcomps; c++)
286 *img_ptr++ = (1 << image->comps[c].prec - 1) * image->comps[c].sgnd +
287 (unsigned)image->comps[c].data[index] << adjust[c];
288 }
289}
290
291static inline void libopenjpeg_copyto8(AVFrame *picture, opj_image_t *image) {
292 int *comp_data;
293 uint8_t *img_ptr;
294 int index, x, y;
295
296 for (index = 0; index < image->numcomps; index++) {
297 comp_data = image->comps[index].data;
298 for (y = 0; y < image->comps[index].h; y++) {
299 img_ptr = picture->data[index] + y * picture->linesize[index];
300 for (x = 0; x < image->comps[index].w; x++) {
301 *img_ptr = 0x80 * image->comps[index].sgnd + *comp_data;
302 img_ptr++;
303 comp_data++;
304 }
305 }
306 }
307}
308
309static inline void libopenjpeg_copyto16(AVFrame *picture, opj_image_t *image) {
310 int *comp_data;
311 uint16_t *img_ptr;
312 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(picture->format);
313 int index, x, y;
314 int adjust[4];
315 for (x = 0; x < image->numcomps; x++)
316 adjust[x] = FFMAX(FFMIN(desc->comp[x].depth - image->comps[x].prec, 8), 0) + desc->comp[x].shift;
317
318 for (index = 0; index < image->numcomps; index++) {
319 comp_data = image->comps[index].data;
320 for (y = 0; y < image->comps[index].h; y++) {
321 img_ptr = (uint16_t *)(picture->data[index] + y * picture->linesize[index]);
322 for (x = 0; x < image->comps[index].w; x++) {
323 *img_ptr = (1 << image->comps[index].prec - 1) * image->comps[index].sgnd +
324 (unsigned)*comp_data << adjust[index];
325 img_ptr++;
326 comp_data++;
327 }
328 }
329 }
330}
331
332static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx)
333{
334 LibOpenJPEGContext *ctx = avctx->priv_data;
335
336 opj_set_default_decoder_parameters(&ctx->dec_params);
337 return 0;
338}
339
340static int libopenjpeg_decode_frame(AVCodecContext *avctx,
341 void *data, int *got_frame,
342 AVPacket *avpkt)
343{
344 uint8_t *buf = avpkt->data;
345 int buf_size = avpkt->size;
346 LibOpenJPEGContext *ctx = avctx->priv_data;
347 ThreadFrame frame = { .f = data };
348 AVFrame *picture = data;
349 const AVPixFmtDescriptor *desc;
350 int width, height, ret;
351 int pixel_size = 0;
352 int ispacked = 0;
353 int i;
354 opj_image_t *image = NULL;
355#if OPENJPEG_MAJOR_VERSION == 1
356 opj_dinfo_t *dec = NULL;
357 opj_cio_t *stream = NULL;
358#else // OPENJPEG_MAJOR_VERSION == 2
359 BufferReader reader = {0, avpkt->size, avpkt->data};
360 opj_codec_t *dec = NULL;
361 opj_stream_t *stream = NULL;
362#endif // OPENJPEG_MAJOR_VERSION == 1
363
364 *got_frame = 0;
365
366 // Check if input is a raw jpeg2k codestream or in jp2 wrapping
367 if ((AV_RB32(buf) == 12) &&
368 (AV_RB32(buf + 4) == JP2_SIG_TYPE) &&
369 (AV_RB32(buf + 8) == JP2_SIG_VALUE)) {
370 dec = opj_create_decompress(OPJ(CODEC_JP2));
371 } else {
372 /* If the AVPacket contains a jp2c box, then skip to
373 * the starting byte of the codestream. */
374 if (AV_RB32(buf + 4) == AV_RB32("jp2c"))
375 buf += 8;
376 dec = opj_create_decompress(OPJ(CODEC_J2K));
377 }
378
379 if (!dec) {
380 av_log(avctx, AV_LOG_ERROR, "Error initializing decoder.\n");
381 ret = AVERROR_EXTERNAL;
382 goto done;
383 }
384
385#if OPENJPEG_MAJOR_VERSION == 1
386 memset(&ctx->event_mgr, 0, sizeof(ctx->event_mgr));
387 ctx->event_mgr.info_handler = info_callback;
388 ctx->event_mgr.error_handler = error_callback;
389 ctx->event_mgr.warning_handler = warning_callback;
390 opj_set_event_mgr((opj_common_ptr) dec, &ctx->event_mgr, avctx);
391 ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;
392 ctx->dec_params.cp_layer = ctx->lowqual;
393#else // OPENJPEG_MAJOR_VERSION == 2
394 if (!opj_set_error_handler(dec, error_callback, avctx) ||
395 !opj_set_warning_handler(dec, warning_callback, avctx) ||
396 !opj_set_info_handler(dec, info_callback, avctx)) {
397 av_log(avctx, AV_LOG_ERROR, "Error setting decoder handlers.\n");
398 ret = AVERROR_EXTERNAL;
399 goto done;
400 }
401
402 ctx->dec_params.cp_layer = ctx->lowqual;
403 ctx->dec_params.cp_reduce = avctx->lowres;
404#endif // OPENJPEG_MAJOR_VERSION == 1
405
406 // Tie decoder with decoding parameters
407 opj_setup_decoder(dec, &ctx->dec_params);
408
409#if OPENJPEG_MAJOR_VERSION == 1
410 stream = opj_cio_open((opj_common_ptr) dec, buf, buf_size);
411#else // OPENJPEG_MAJOR_VERSION == 2
412 stream = opj_stream_default_create(OPJ_STREAM_READ);
413#endif // OPENJPEG_MAJOR_VERSION == 1
414
415 if (!stream) {
416 av_log(avctx, AV_LOG_ERROR,
417 "Codestream could not be opened for reading.\n");
418 ret = AVERROR_EXTERNAL;
419 goto done;
420 }
421
422#if OPENJPEG_MAJOR_VERSION == 1
423 // Decode the header only.
424 image = opj_decode_with_info(dec, stream, NULL);
425 opj_cio_close(stream);
426 stream = NULL;
427 ret = !image;
428#else // OPENJPEG_MAJOR_VERSION == 2
429 opj_stream_set_read_function(stream, stream_read);
430 opj_stream_set_skip_function(stream, stream_skip);
431 opj_stream_set_seek_function(stream, stream_seek);
432#if HAVE_OPENJPEG_2_1_OPENJPEG_H
433 opj_stream_set_user_data(stream, &reader, NULL);
434#elif HAVE_OPENJPEG_2_0_OPENJPEG_H
435 opj_stream_set_user_data(stream, &reader);
436#else
437#error Missing call to opj_stream_set_user_data
438#endif
439 opj_stream_set_user_data_length(stream, avpkt->size);
440 // Decode the header only.
441 ret = !opj_read_header(stream, dec, &image);
442#endif // OPENJPEG_MAJOR_VERSION == 1
443
444 if (ret) {
445 av_log(avctx, AV_LOG_ERROR, "Error decoding codestream header.\n");
446 ret = AVERROR_EXTERNAL;
447 goto done;
448 }
449
450 width = image->x1 - image->x0;
451 height = image->y1 - image->y0;
452
453 ret = ff_set_dimensions(avctx, width, height);
454 if (ret < 0)
455 goto done;
456
457 if (avctx->pix_fmt != AV_PIX_FMT_NONE)
458 if (!libopenjpeg_matches_pix_fmt(image, avctx->pix_fmt))
459 avctx->pix_fmt = AV_PIX_FMT_NONE;
460
461 if (avctx->pix_fmt == AV_PIX_FMT_NONE)
462 avctx->pix_fmt = libopenjpeg_guess_pix_fmt(image);
463
464 if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
465 av_log(avctx, AV_LOG_ERROR, "Unable to determine pixel format.\n");
466 ret = AVERROR_UNKNOWN;
467 goto done;
468 }
469 for (i = 0; i < image->numcomps; i++)
470 if (image->comps[i].prec > avctx->bits_per_raw_sample)
471 avctx->bits_per_raw_sample = image->comps[i].prec;
472
473 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
474 goto done;
475
476#if OPENJPEG_MAJOR_VERSION == 1
477 ctx->dec_params.cp_limit_decoding = NO_LIMITATION;
478 ctx->dec_params.cp_reduce = avctx->lowres;
479 // Tie decoder with decoding parameters.
480 opj_setup_decoder(dec, &ctx->dec_params);
481 stream = opj_cio_open((opj_common_ptr) dec, buf, buf_size);
482 if (!stream) {
483 av_log(avctx, AV_LOG_ERROR,
484 "Codestream could not be opened for reading.\n");
485 ret = AVERROR_EXTERNAL;
486 goto done;
487 }
488 opj_image_destroy(image);
489 // Decode the codestream
490 image = opj_decode_with_info(dec, stream, NULL);
491 ret = !image;
492#else // OPENJPEG_MAJOR_VERSION == 2
493 ret = !opj_decode(dec, stream, image);
494#endif // OPENJPEG_MAJOR_VERSION == 1
495
496 if (ret) {
497 av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
498 ret = AVERROR_EXTERNAL;
499 goto done;
500 }
501
502 for (i = 0; i < image->numcomps; i++) {
503 if (!image->comps[i].data) {
504 av_log(avctx, AV_LOG_ERROR,
505 "Image component %d contains no data.\n", i);
506 ret = AVERROR_INVALIDDATA;
507 goto done;
508 }
509 }
510
511 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
512 pixel_size = desc->comp[0].step;
513 ispacked = libopenjpeg_ispacked(avctx->pix_fmt);
514
515 switch (pixel_size) {
516 case 1:
517 if (ispacked) {
518 libopenjpeg_copy_to_packed8(picture, image);
519 } else {
520 libopenjpeg_copyto8(picture, image);
521 }
522 break;
523 case 2:
524 if (ispacked) {
525 libopenjpeg_copy_to_packed8(picture, image);
526 } else {
527 libopenjpeg_copyto16(picture, image);
528 }
529 break;
530 case 3:
531 case 4:
532 if (ispacked) {
533 libopenjpeg_copy_to_packed8(picture, image);
534 }
535 break;
536 case 6:
537 case 8:
538 if (ispacked) {
539 libopenjpeg_copy_to_packed16(picture, image);
540 }
541 break;
542 default:
543 avpriv_report_missing_feature(avctx, "Pixel size %d", pixel_size);
544 ret = AVERROR_PATCHWELCOME;
545 goto done;
546 }
547
548 *got_frame = 1;
549 picture->pict_type = AV_PICTURE_TYPE_I;
550 picture->key_frame = 1;
551 ret = buf_size;
552
553done:
554 opj_image_destroy(image);
555#if OPENJPEG_MAJOR_VERSION == 2
556 opj_stream_destroy(stream);
557 opj_destroy_codec(dec);
558#else
559 opj_cio_close(stream);
560 opj_destroy_decompress(dec);
561#endif
562 return ret;
563}
564
565static av_cold void libopenjpeg_static_init(AVCodec *codec)
566{
567 const char *version = opj_version();
568 int major, minor;
569
570 if (sscanf(version, "%d.%d", &major, &minor) == 2 && 1000*major + minor <= 1003)
571 codec->capabilities |= AV_CODEC_CAP_EXPERIMENTAL;
572}
573
574#define OFFSET(x) offsetof(LibOpenJPEGContext, x)
575#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
576
577static const AVOption options[] = {
578 { "lowqual", "Limit the number of layers used for decoding",
579 OFFSET(lowqual), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VD },
580 { NULL },
581};
582
583static const AVClass openjpeg_class = {
584 .class_name = "libopenjpeg",
585 .item_name = av_default_item_name,
586 .option = options,
587 .version = LIBAVUTIL_VERSION_INT,
588};
589
590AVCodec ff_libopenjpeg_decoder = {
591 .name = "libopenjpeg",
592 .long_name = NULL_IF_CONFIG_SMALL("OpenJPEG JPEG 2000"),
593 .type = AVMEDIA_TYPE_VIDEO,
594 .id = AV_CODEC_ID_JPEG2000,
595 .priv_data_size = sizeof(LibOpenJPEGContext),
596 .init = libopenjpeg_decode_init,
597 .decode = libopenjpeg_decode_frame,
598 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
599 .max_lowres = 31,
600 .priv_class = &openjpeg_class,
601 .init_static_data = libopenjpeg_static_init,
602};
603
generated by cgit at 2024-05-17 06:09:52 (GMT)