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1/*
2 * PGS subtitle decoder
3 * Copyright (c) 2009 Stephen Backway
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 * PGS subtitle decoder
25 */
26
27#include "avcodec.h"
28#include "bytestream.h"
29#include "internal.h"
30#include "mathops.h"
31
32#include "libavutil/colorspace.h"
33#include "libavutil/imgutils.h"
34#include "libavutil/opt.h"
35
36#define RGBA(r,g,b,a) (((unsigned)(a) << 24) | ((r) << 16) | ((g) << 8) | (b))
37#define MAX_EPOCH_PALETTES 8 // Max 8 allowed per PGS epoch
38#define MAX_EPOCH_OBJECTS 64 // Max 64 allowed per PGS epoch
39#define MAX_OBJECT_REFS 2 // Max objects per display set
40
41enum SegmentType {
42 PALETTE_SEGMENT = 0x14,
43 OBJECT_SEGMENT = 0x15,
44 PRESENTATION_SEGMENT = 0x16,
45 WINDOW_SEGMENT = 0x17,
46 DISPLAY_SEGMENT = 0x80,
47};
48
49typedef struct PGSSubObjectRef {
50 int id;
51 int window_id;
52 uint8_t composition_flag;
53 int x;
54 int y;
55 int crop_x;
56 int crop_y;
57 int crop_w;
58 int crop_h;
59} PGSSubObjectRef;
60
61typedef struct PGSSubPresentation {
62 int id_number;
63 int palette_id;
64 int object_count;
65 PGSSubObjectRef objects[MAX_OBJECT_REFS];
66 int64_t pts;
67} PGSSubPresentation;
68
69typedef struct PGSSubObject {
70 int id;
71 int w;
72 int h;
73 uint8_t *rle;
74 unsigned int rle_buffer_size, rle_data_len;
75 unsigned int rle_remaining_len;
76} PGSSubObject;
77
78typedef struct PGSSubObjects {
79 int count;
80 PGSSubObject object[MAX_EPOCH_OBJECTS];
81} PGSSubObjects;
82
83typedef struct PGSSubPalette {
84 int id;
85 uint32_t clut[256];
86} PGSSubPalette;
87
88typedef struct PGSSubPalettes {
89 int count;
90 PGSSubPalette palette[MAX_EPOCH_PALETTES];
91} PGSSubPalettes;
92
93typedef struct PGSSubContext {
94 AVClass *class;
95 PGSSubPresentation presentation;
96 PGSSubPalettes palettes;
97 PGSSubObjects objects;
98 int forced_subs_only;
99} PGSSubContext;
100
101static void flush_cache(AVCodecContext *avctx)
102{
103 PGSSubContext *ctx = avctx->priv_data;
104 int i;
105
106 for (i = 0; i < ctx->objects.count; i++) {
107 av_freep(&ctx->objects.object[i].rle);
108 ctx->objects.object[i].rle_buffer_size = 0;
109 ctx->objects.object[i].rle_remaining_len = 0;
110 }
111 ctx->objects.count = 0;
112 ctx->palettes.count = 0;
113}
114
115static PGSSubObject * find_object(int id, PGSSubObjects *objects)
116{
117 int i;
118
119 for (i = 0; i < objects->count; i++) {
120 if (objects->object[i].id == id)
121 return &objects->object[i];
122 }
123 return NULL;
124}
125
126static PGSSubPalette * find_palette(int id, PGSSubPalettes *palettes)
127{
128 int i;
129
130 for (i = 0; i < palettes->count; i++) {
131 if (palettes->palette[i].id == id)
132 return &palettes->palette[i];
133 }
134 return NULL;
135}
136
137static av_cold int init_decoder(AVCodecContext *avctx)
138{
139 avctx->pix_fmt = AV_PIX_FMT_PAL8;
140
141 return 0;
142}
143
144static av_cold int close_decoder(AVCodecContext *avctx)
145{
146 flush_cache(avctx);
147
148 return 0;
149}
150
151/**
152 * Decode the RLE data.
153 *
154 * The subtitle is stored as a Run Length Encoded image.
155 *
156 * @param avctx contains the current codec context
157 * @param sub pointer to the processed subtitle data
158 * @param buf pointer to the RLE data to process
159 * @param buf_size size of the RLE data to process
160 */
161static int decode_rle(AVCodecContext *avctx, AVSubtitleRect *rect,
162 const uint8_t *buf, unsigned int buf_size)
163{
164 const uint8_t *rle_bitmap_end;
165 int pixel_count, line_count;
166
167 rle_bitmap_end = buf + buf_size;
168
169 rect->data[0] = av_malloc_array(rect->w, rect->h);
170
171 if (!rect->data[0])
172 return AVERROR(ENOMEM);
173
174 pixel_count = 0;
175 line_count = 0;
176
177 while (buf < rle_bitmap_end && line_count < rect->h) {
178 uint8_t flags, color;
179 int run;
180
181 color = bytestream_get_byte(&buf);
182 run = 1;
183
184 if (color == 0x00) {
185 flags = bytestream_get_byte(&buf);
186 run = flags & 0x3f;
187 if (flags & 0x40)
188 run = (run << 8) + bytestream_get_byte(&buf);
189 color = flags & 0x80 ? bytestream_get_byte(&buf) : 0;
190 }
191
192 if (run > 0 && pixel_count + run <= rect->w * rect->h) {
193 memset(rect->data[0] + pixel_count, color, run);
194 pixel_count += run;
195 } else if (!run) {
196 /*
197 * New Line. Check if correct pixels decoded, if not display warning
198 * and adjust bitmap pointer to correct new line position.
199 */
200 if (pixel_count % rect->w > 0) {
201 av_log(avctx, AV_LOG_ERROR, "Decoded %d pixels, when line should be %d pixels\n",
202 pixel_count % rect->w, rect->w);
203 if (avctx->err_recognition & AV_EF_EXPLODE) {
204 return AVERROR_INVALIDDATA;
205 }
206 }
207 line_count++;
208 }
209 }
210
211 if (pixel_count < rect->w * rect->h) {
212 av_log(avctx, AV_LOG_ERROR, "Insufficient RLE data for subtitle\n");
213 return AVERROR_INVALIDDATA;
214 }
215
216 ff_dlog(avctx, "Pixel Count = %d, Area = %d\n", pixel_count, rect->w * rect->h);
217
218 return 0;
219}
220
221/**
222 * Parse the picture segment packet.
223 *
224 * The picture segment contains details on the sequence id,
225 * width, height and Run Length Encoded (RLE) bitmap data.
226 *
227 * @param avctx contains the current codec context
228 * @param buf pointer to the packet to process
229 * @param buf_size size of packet to process
230 */
231static int parse_object_segment(AVCodecContext *avctx,
232 const uint8_t *buf, int buf_size)
233{
234 PGSSubContext *ctx = avctx->priv_data;
235 PGSSubObject *object;
236
237 uint8_t sequence_desc;
238 unsigned int rle_bitmap_len, width, height;
239 int id;
240
241 if (buf_size <= 4)
242 return AVERROR_INVALIDDATA;
243 buf_size -= 4;
244
245 id = bytestream_get_be16(&buf);
246 object = find_object(id, &ctx->objects);
247 if (!object) {
248 if (ctx->objects.count >= MAX_EPOCH_OBJECTS) {
249 av_log(avctx, AV_LOG_ERROR, "Too many objects in epoch\n");
250 return AVERROR_INVALIDDATA;
251 }
252 object = &ctx->objects.object[ctx->objects.count++];
253 object->id = id;
254 }
255
256 /* skip object version number */
257 buf += 1;
258
259 /* Read the Sequence Description to determine if start of RLE data or appended to previous RLE */
260 sequence_desc = bytestream_get_byte(&buf);
261
262 if (!(sequence_desc & 0x80)) {
263 /* Additional RLE data */
264 if (buf_size > object->rle_remaining_len)
265 return AVERROR_INVALIDDATA;
266
267 memcpy(object->rle + object->rle_data_len, buf, buf_size);
268 object->rle_data_len += buf_size;
269 object->rle_remaining_len -= buf_size;
270
271 return 0;
272 }
273
274 if (buf_size <= 7)
275 return AVERROR_INVALIDDATA;
276 buf_size -= 7;
277
278 /* Decode rle bitmap length, stored size includes width/height data */
279 rle_bitmap_len = bytestream_get_be24(&buf) - 2*2;
280
281 if (buf_size > rle_bitmap_len) {
282 av_log(avctx, AV_LOG_ERROR,
283 "Buffer dimension %d larger than the expected RLE data %d\n",
284 buf_size, rle_bitmap_len);
285 return AVERROR_INVALIDDATA;
286 }
287
288 /* Get bitmap dimensions from data */
289 width = bytestream_get_be16(&buf);
290 height = bytestream_get_be16(&buf);
291
292 /* Make sure the bitmap is not too large */
293 if (avctx->width < width || avctx->height < height || !width || !height) {
294 av_log(avctx, AV_LOG_ERROR, "Bitmap dimensions (%dx%d) invalid.\n", width, height);
295 return AVERROR_INVALIDDATA;
296 }
297
298 object->w = width;
299 object->h = height;
300
301 av_fast_padded_malloc(&object->rle, &object->rle_buffer_size, rle_bitmap_len);
302
303 if (!object->rle) {
304 object->rle_data_len = 0;
305 object->rle_remaining_len = 0;
306 return AVERROR(ENOMEM);
307 }
308
309 memcpy(object->rle, buf, buf_size);
310 object->rle_data_len = buf_size;
311 object->rle_remaining_len = rle_bitmap_len - buf_size;
312
313 return 0;
314}
315
316/**
317 * Parse the palette segment packet.
318 *
319 * The palette segment contains details of the palette,
320 * a maximum of 256 colors can be defined.
321 *
322 * @param avctx contains the current codec context
323 * @param buf pointer to the packet to process
324 * @param buf_size size of packet to process
325 */
326static int parse_palette_segment(AVCodecContext *avctx,
327 const uint8_t *buf, int buf_size)
328{
329 PGSSubContext *ctx = avctx->priv_data;
330 PGSSubPalette *palette;
331
332 const uint8_t *buf_end = buf + buf_size;
333 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
334 int color_id;
335 int y, cb, cr, alpha;
336 int r, g, b, r_add, g_add, b_add;
337 int id;
338
339 id = bytestream_get_byte(&buf);
340 palette = find_palette(id, &ctx->palettes);
341 if (!palette) {
342 if (ctx->palettes.count >= MAX_EPOCH_PALETTES) {
343 av_log(avctx, AV_LOG_ERROR, "Too many palettes in epoch\n");
344 return AVERROR_INVALIDDATA;
345 }
346 palette = &ctx->palettes.palette[ctx->palettes.count++];
347 palette->id = id;
348 }
349
350 /* Skip palette version */
351 buf += 1;
352
353 while (buf < buf_end) {
354 color_id = bytestream_get_byte(&buf);
355 y = bytestream_get_byte(&buf);
356 cr = bytestream_get_byte(&buf);
357 cb = bytestream_get_byte(&buf);
358 alpha = bytestream_get_byte(&buf);
359
360 /* Default to BT.709 colorspace. In case of <= 576 height use BT.601 */
361 if (avctx->height <= 0 || avctx->height > 576) {
362 YUV_TO_RGB1_CCIR_BT709(cb, cr);
363 } else {
364 YUV_TO_RGB1_CCIR(cb, cr);
365 }
366
367 YUV_TO_RGB2_CCIR(r, g, b, y);
368
369 ff_dlog(avctx, "Color %d := (%d,%d,%d,%d)\n", color_id, r, g, b, alpha);
370
371 /* Store color in palette */
372 palette->clut[color_id] = RGBA(r,g,b,alpha);
373 }
374 return 0;
375}
376
377/**
378 * Parse the presentation segment packet.
379 *
380 * The presentation segment contains details on the video
381 * width, video height, x & y subtitle position.
382 *
383 * @param avctx contains the current codec context
384 * @param buf pointer to the packet to process
385 * @param buf_size size of packet to process
386 * @todo TODO: Implement cropping
387 */
388static int parse_presentation_segment(AVCodecContext *avctx,
389 const uint8_t *buf, int buf_size,
390 int64_t pts)
391{
392 PGSSubContext *ctx = avctx->priv_data;
393 int i, state, ret;
394 const uint8_t *buf_end = buf + buf_size;
395
396 // Video descriptor
397 int w = bytestream_get_be16(&buf);
398 int h = bytestream_get_be16(&buf);
399
400 ctx->presentation.pts = pts;
401
402 ff_dlog(avctx, "Video Dimensions %dx%d\n",
403 w, h);
404 ret = ff_set_dimensions(avctx, w, h);
405 if (ret < 0)
406 return ret;
407
408 /* Skip 1 bytes of unknown, frame rate */
409 buf++;
410
411 // Composition descriptor
412 ctx->presentation.id_number = bytestream_get_be16(&buf);
413 /*
414 * state is a 2 bit field that defines pgs epoch boundaries
415 * 00 - Normal, previously defined objects and palettes are still valid
416 * 01 - Acquisition point, previous objects and palettes can be released
417 * 10 - Epoch start, previous objects and palettes can be released
418 * 11 - Epoch continue, previous objects and palettes can be released
419 *
420 * reserved 6 bits discarded
421 */
422 state = bytestream_get_byte(&buf) >> 6;
423 if (state != 0) {
424 flush_cache(avctx);
425 }
426
427 /*
428 * skip palette_update_flag (0x80),
429 */
430 buf += 1;
431 ctx->presentation.palette_id = bytestream_get_byte(&buf);
432 ctx->presentation.object_count = bytestream_get_byte(&buf);
433 if (ctx->presentation.object_count > MAX_OBJECT_REFS) {
434 av_log(avctx, AV_LOG_ERROR,
435 "Invalid number of presentation objects %d\n",
436 ctx->presentation.object_count);
437 ctx->presentation.object_count = 2;
438 if (avctx->err_recognition & AV_EF_EXPLODE) {
439 return AVERROR_INVALIDDATA;
440 }
441 }
442
443
444 for (i = 0; i < ctx->presentation.object_count; i++)
445 {
446
447 if (buf_end - buf < 8) {
448 av_log(avctx, AV_LOG_ERROR, "Insufficent space for object\n");
449 ctx->presentation.object_count = i;
450 return AVERROR_INVALIDDATA;
451 }
452
453 ctx->presentation.objects[i].id = bytestream_get_be16(&buf);
454 ctx->presentation.objects[i].window_id = bytestream_get_byte(&buf);
455 ctx->presentation.objects[i].composition_flag = bytestream_get_byte(&buf);
456
457 ctx->presentation.objects[i].x = bytestream_get_be16(&buf);
458 ctx->presentation.objects[i].y = bytestream_get_be16(&buf);
459
460 // If cropping
461 if (ctx->presentation.objects[i].composition_flag & 0x80) {
462 ctx->presentation.objects[i].crop_x = bytestream_get_be16(&buf);
463 ctx->presentation.objects[i].crop_y = bytestream_get_be16(&buf);
464 ctx->presentation.objects[i].crop_w = bytestream_get_be16(&buf);
465 ctx->presentation.objects[i].crop_h = bytestream_get_be16(&buf);
466 }
467
468 ff_dlog(avctx, "Subtitle Placement x=%d, y=%d\n",
469 ctx->presentation.objects[i].x, ctx->presentation.objects[i].y);
470
471 if (ctx->presentation.objects[i].x > avctx->width ||
472 ctx->presentation.objects[i].y > avctx->height) {
473 av_log(avctx, AV_LOG_ERROR, "Subtitle out of video bounds. x = %d, y = %d, video width = %d, video height = %d.\n",
474 ctx->presentation.objects[i].x,
475 ctx->presentation.objects[i].y,
476 avctx->width, avctx->height);
477 ctx->presentation.objects[i].x = 0;
478 ctx->presentation.objects[i].y = 0;
479 if (avctx->err_recognition & AV_EF_EXPLODE) {
480 return AVERROR_INVALIDDATA;
481 }
482 }
483 }
484
485 return 0;
486}
487
488/**
489 * Parse the display segment packet.
490 *
491 * The display segment controls the updating of the display.
492 *
493 * @param avctx contains the current codec context
494 * @param data pointer to the data pertaining the subtitle to display
495 * @param buf pointer to the packet to process
496 * @param buf_size size of packet to process
497 */
498static int display_end_segment(AVCodecContext *avctx, void *data,
499 const uint8_t *buf, int buf_size)
500{
501 AVSubtitle *sub = data;
502 PGSSubContext *ctx = avctx->priv_data;
503 int64_t pts;
504 PGSSubPalette *palette;
505 int i, ret;
506
507 pts = ctx->presentation.pts != AV_NOPTS_VALUE ? ctx->presentation.pts : sub->pts;
508 memset(sub, 0, sizeof(*sub));
509 sub->pts = pts;
510 ctx->presentation.pts = AV_NOPTS_VALUE;
511 sub->start_display_time = 0;
512 // There is no explicit end time for PGS subtitles. The end time
513 // is defined by the start of the next sub which may contain no
514 // objects (i.e. clears the previous sub)
515 sub->end_display_time = UINT32_MAX;
516 sub->format = 0;
517
518 // Blank if last object_count was 0.
519 if (!ctx->presentation.object_count)
520 return 1;
521 sub->rects = av_mallocz_array(ctx->presentation.object_count, sizeof(*sub->rects));
522 if (!sub->rects) {
523 return AVERROR(ENOMEM);
524 }
525 palette = find_palette(ctx->presentation.palette_id, &ctx->palettes);
526 if (!palette) {
527 // Missing palette. Should only happen with damaged streams.
528 av_log(avctx, AV_LOG_ERROR, "Invalid palette id %d\n",
529 ctx->presentation.palette_id);
530 avsubtitle_free(sub);
531 return AVERROR_INVALIDDATA;
532 }
533 for (i = 0; i < ctx->presentation.object_count; i++) {
534 PGSSubObject *object;
535
536 sub->rects[i] = av_mallocz(sizeof(*sub->rects[0]));
537 if (!sub->rects[i]) {
538 avsubtitle_free(sub);
539 return AVERROR(ENOMEM);
540 }
541 sub->num_rects++;
542 sub->rects[i]->type = SUBTITLE_BITMAP;
543
544 /* Process bitmap */
545 object = find_object(ctx->presentation.objects[i].id, &ctx->objects);
546 if (!object) {
547 // Missing object. Should only happen with damaged streams.
548 av_log(avctx, AV_LOG_ERROR, "Invalid object id %d\n",
549 ctx->presentation.objects[i].id);
550 if (avctx->err_recognition & AV_EF_EXPLODE) {
551 avsubtitle_free(sub);
552 return AVERROR_INVALIDDATA;
553 }
554 // Leaves rect empty with 0 width and height.
555 continue;
556 }
557 if (ctx->presentation.objects[i].composition_flag & 0x40)
558 sub->rects[i]->flags |= AV_SUBTITLE_FLAG_FORCED;
559
560 sub->rects[i]->x = ctx->presentation.objects[i].x;
561 sub->rects[i]->y = ctx->presentation.objects[i].y;
562
563 if (object->rle) {
564 sub->rects[i]->w = object->w;
565 sub->rects[i]->h = object->h;
566
567 sub->rects[i]->linesize[0] = object->w;
568
569 if (object->rle_remaining_len) {
570 av_log(avctx, AV_LOG_ERROR, "RLE data length %u is %u bytes shorter than expected\n",
571 object->rle_data_len, object->rle_remaining_len);
572 if (avctx->err_recognition & AV_EF_EXPLODE) {
573 avsubtitle_free(sub);
574 return AVERROR_INVALIDDATA;
575 }
576 }
577 ret = decode_rle(avctx, sub->rects[i], object->rle, object->rle_data_len);
578 if (ret < 0) {
579 if ((avctx->err_recognition & AV_EF_EXPLODE) ||
580 ret == AVERROR(ENOMEM)) {
581 avsubtitle_free(sub);
582 return ret;
583 }
584 sub->rects[i]->w = 0;
585 sub->rects[i]->h = 0;
586 continue;
587 }
588 }
589 /* Allocate memory for colors */
590 sub->rects[i]->nb_colors = 256;
591 sub->rects[i]->data[1] = av_mallocz(AVPALETTE_SIZE);
592 if (!sub->rects[i]->data[1]) {
593 avsubtitle_free(sub);
594 return AVERROR(ENOMEM);
595 }
596
597 if (!ctx->forced_subs_only || ctx->presentation.objects[i].composition_flag & 0x40)
598 memcpy(sub->rects[i]->data[1], palette->clut, sub->rects[i]->nb_colors * sizeof(uint32_t));
599
600#if FF_API_AVPICTURE
601FF_DISABLE_DEPRECATION_WARNINGS
602{
603 AVSubtitleRect *rect;
604 int j;
605 rect = sub->rects[i];
606 for (j = 0; j < 4; j++) {
607 rect->pict.data[j] = rect->data[j];
608 rect->pict.linesize[j] = rect->linesize[j];
609 }
610}
611FF_ENABLE_DEPRECATION_WARNINGS
612#endif
613 }
614 return 1;
615}
616
617static int decode(AVCodecContext *avctx, void *data, int *data_size,
618 AVPacket *avpkt)
619{
620 const uint8_t *buf = avpkt->data;
621 int buf_size = avpkt->size;
622
623 const uint8_t *buf_end;
624 uint8_t segment_type;
625 int segment_length;
626 int i, ret;
627
628 ff_dlog(avctx, "PGS sub packet:\n");
629
630 for (i = 0; i < buf_size; i++) {
631 ff_dlog(avctx, "%02x ", buf[i]);
632 if (i % 16 == 15)
633 ff_dlog(avctx, "\n");
634 }
635
636 if (i & 15)
637 ff_dlog(avctx, "\n");
638
639 *data_size = 0;
640
641 /* Ensure that we have received at a least a segment code and segment length */
642 if (buf_size < 3)
643 return -1;
644
645 buf_end = buf + buf_size;
646
647 /* Step through buffer to identify segments */
648 while (buf < buf_end) {
649 segment_type = bytestream_get_byte(&buf);
650 segment_length = bytestream_get_be16(&buf);
651
652 ff_dlog(avctx, "Segment Length %d, Segment Type %x\n", segment_length, segment_type);
653
654 if (segment_type != DISPLAY_SEGMENT && segment_length > buf_end - buf)
655 break;
656
657 ret = 0;
658 switch (segment_type) {
659 case PALETTE_SEGMENT:
660 ret = parse_palette_segment(avctx, buf, segment_length);
661 break;
662 case OBJECT_SEGMENT:
663 ret = parse_object_segment(avctx, buf, segment_length);
664 break;
665 case PRESENTATION_SEGMENT:
666 ret = parse_presentation_segment(avctx, buf, segment_length, ((AVSubtitle*)(data))->pts);
667 break;
668 case WINDOW_SEGMENT:
669 /*
670 * Window Segment Structure (No new information provided):
671 * 2 bytes: Unknown,
672 * 2 bytes: X position of subtitle,
673 * 2 bytes: Y position of subtitle,
674 * 2 bytes: Width of subtitle,
675 * 2 bytes: Height of subtitle.
676 */
677 break;
678 case DISPLAY_SEGMENT:
679 ret = display_end_segment(avctx, data, buf, segment_length);
680 if (ret >= 0)
681 *data_size = ret;
682 break;
683 default:
684 av_log(avctx, AV_LOG_ERROR, "Unknown subtitle segment type 0x%x, length %d\n",
685 segment_type, segment_length);
686 ret = AVERROR_INVALIDDATA;
687 break;
688 }
689 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
690 return ret;
691
692 buf += segment_length;
693 }
694
695 return buf_size;
696}
697
698#define OFFSET(x) offsetof(PGSSubContext, x)
699#define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM
700static const AVOption options[] = {
701 {"forced_subs_only", "Only show forced subtitles", OFFSET(forced_subs_only), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, SD},
702 { NULL },
703};
704
705static const AVClass pgsdec_class = {
706 .class_name = "PGS subtitle decoder",
707 .item_name = av_default_item_name,
708 .option = options,
709 .version = LIBAVUTIL_VERSION_INT,
710};
711
712AVCodec ff_pgssub_decoder = {
713 .name = "pgssub",
714 .long_name = NULL_IF_CONFIG_SMALL("HDMV Presentation Graphic Stream subtitles"),
715 .type = AVMEDIA_TYPE_SUBTITLE,
716 .id = AV_CODEC_ID_HDMV_PGS_SUBTITLE,
717 .priv_data_size = sizeof(PGSSubContext),
718 .init = init_decoder,
719 .close = close_decoder,
720 .decode = decode,
721 .priv_class = &pgsdec_class,
722};
723
generated by cgit at 2024-05-17 02:11:03 (GMT)