2 * DVB subtitle decoding for ffmpeg
3 * Copyright (c) 2005 Ian Caulfield
5 * This file is part of FFmpeg.
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.
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.
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
24 #include "colorspace.h"
27 //#define DEBUG_PACKET_CONTENTS
28 //#define DEBUG_SAVE_IMAGES
30 #define DVBSUB_PAGE_SEGMENT 0x10
31 #define DVBSUB_REGION_SEGMENT 0x11
32 #define DVBSUB_CLUT_SEGMENT 0x12
33 #define DVBSUB_OBJECT_SEGMENT 0x13
34 #define DVBSUB_DISPLAY_SEGMENT 0x80
36 #define cm (ff_cropTbl + MAX_NEG_CROP)
38 #ifdef DEBUG_SAVE_IMAGES
41 static void png_save(const char *filename, uint8_t *bitmap, int w, int h,
42 uint32_t *rgba_palette)
46 char fname[40], fname2[40];
49 snprintf(fname, 40, "%s.ppm", filename);
51 f = fopen(fname, "w");
60 for(y = 0; y < h; y++) {
61 for(x = 0; x < w; x++) {
62 v = rgba_palette[bitmap[y * w + x]];
63 putc((v >> 16) & 0xff, f);
64 putc((v >> 8) & 0xff, f);
65 putc((v >> 0) & 0xff, f);
71 snprintf(fname2, 40, "%s-a.pgm", filename);
73 f = fopen(fname2, "w");
82 for(y = 0; y < h; y++) {
83 for(x = 0; x < w; x++) {
84 v = rgba_palette[bitmap[y * w + x]];
85 putc((v >> 24) & 0xff, f);
90 snprintf(command, 1024, "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename);
93 snprintf(command, 1024, "rm %s %s", fname, fname2);
98 static void png_save2(const char *filename, uint32_t *bitmap, int w, int h)
102 char fname[40], fname2[40];
105 snprintf(fname, sizeof(fname), "%s.ppm", filename);
107 f = fopen(fname, "w");
116 for(y = 0; y < h; y++) {
117 for(x = 0; x < w; x++) {
118 v = bitmap[y * w + x];
119 putc((v >> 16) & 0xff, f);
120 putc((v >> 8) & 0xff, f);
121 putc((v >> 0) & 0xff, f);
127 snprintf(fname2, sizeof(fname2), "%s-a.pgm", filename);
129 f = fopen(fname2, "w");
138 for(y = 0; y < h; y++) {
139 for(x = 0; x < w; x++) {
140 v = bitmap[y * w + x];
141 putc((v >> 24) & 0xff, f);
146 snprintf(command, sizeof(command), "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename);
149 snprintf(command, sizeof(command), "rm %s %s", fname, fname2);
154 #define RGBA(r,g,b,a) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b))
156 typedef struct DVBSubCLUT {
161 uint32_t clut256[256];
163 struct DVBSubCLUT *next;
166 static DVBSubCLUT default_clut;
168 typedef struct DVBSubObjectDisplay {
178 struct DVBSubObjectDisplay *region_list_next;
179 struct DVBSubObjectDisplay *object_list_next;
180 } DVBSubObjectDisplay;
182 typedef struct DVBSubObject {
187 DVBSubObjectDisplay *display_list;
189 struct DVBSubObject *next;
192 typedef struct DVBSubRegionDisplay {
198 struct DVBSubRegionDisplay *next;
199 } DVBSubRegionDisplay;
201 typedef struct DVBSubRegion {
214 DVBSubObjectDisplay *display_list;
216 struct DVBSubRegion *next;
219 typedef struct DVBSubContext {
224 DVBSubRegion *region_list;
225 DVBSubCLUT *clut_list;
226 DVBSubObject *object_list;
228 int display_list_size;
229 DVBSubRegionDisplay *display_list;
233 static DVBSubObject* get_object(DVBSubContext *ctx, int object_id)
235 DVBSubObject *ptr = ctx->object_list;
237 while (ptr && ptr->id != object_id) {
244 static DVBSubCLUT* get_clut(DVBSubContext *ctx, int clut_id)
246 DVBSubCLUT *ptr = ctx->clut_list;
248 while (ptr && ptr->id != clut_id) {
255 static DVBSubRegion* get_region(DVBSubContext *ctx, int region_id)
257 DVBSubRegion *ptr = ctx->region_list;
259 while (ptr && ptr->id != region_id) {
266 static void delete_region_display_list(DVBSubContext *ctx, DVBSubRegion *region)
268 DVBSubObject *object, *obj2, **obj2_ptr;
269 DVBSubObjectDisplay *display, *obj_disp, **obj_disp_ptr;
271 while (region->display_list) {
272 display = region->display_list;
274 object = get_object(ctx, display->object_id);
277 obj_disp_ptr = &object->display_list;
278 obj_disp = *obj_disp_ptr;
280 while (obj_disp && obj_disp != display) {
281 obj_disp_ptr = &obj_disp->object_list_next;
282 obj_disp = *obj_disp_ptr;
286 *obj_disp_ptr = obj_disp->object_list_next;
288 if (!object->display_list) {
289 obj2_ptr = &ctx->object_list;
292 while (obj2 != object) {
294 obj2_ptr = &obj2->next;
298 *obj2_ptr = obj2->next;
305 region->display_list = display->region_list_next;
312 static void delete_state(DVBSubContext *ctx)
314 DVBSubRegion *region;
317 while (ctx->region_list) {
318 region = ctx->region_list;
320 ctx->region_list = region->next;
322 delete_region_display_list(ctx, region);
324 av_free(region->pbuf);
329 while (ctx->clut_list) {
330 clut = ctx->clut_list;
332 ctx->clut_list = clut->next;
337 /* Should already be null */
338 if (ctx->object_list)
339 av_log(0, AV_LOG_ERROR, "Memory deallocation error!\n");
342 static av_cold int dvbsub_init_decoder(AVCodecContext *avctx)
344 int i, r, g, b, a = 0;
345 DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
347 memset(avctx->priv_data, 0, sizeof(DVBSubContext));
349 ctx->composition_id = avctx->sub_id & 0xffff;
350 ctx->ancillary_id = avctx->sub_id >> 16;
352 default_clut.id = -1;
353 default_clut.next = NULL;
355 default_clut.clut4[0] = RGBA( 0, 0, 0, 0);
356 default_clut.clut4[1] = RGBA(255, 255, 255, 255);
357 default_clut.clut4[2] = RGBA( 0, 0, 0, 255);
358 default_clut.clut4[3] = RGBA(127, 127, 127, 255);
360 default_clut.clut16[0] = RGBA( 0, 0, 0, 0);
361 for (i = 1; i < 16; i++) {
363 r = (i & 1) ? 255 : 0;
364 g = (i & 2) ? 255 : 0;
365 b = (i & 4) ? 255 : 0;
367 r = (i & 1) ? 127 : 0;
368 g = (i & 2) ? 127 : 0;
369 b = (i & 4) ? 127 : 0;
371 default_clut.clut16[i] = RGBA(r, g, b, 255);
374 default_clut.clut256[0] = RGBA( 0, 0, 0, 0);
375 for (i = 1; i < 256; i++) {
377 r = (i & 1) ? 255 : 0;
378 g = (i & 2) ? 255 : 0;
379 b = (i & 4) ? 255 : 0;
384 r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
385 g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
386 b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
390 r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
391 g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
392 b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
396 r = 127 + ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
397 g = 127 + ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
398 b = 127 + ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
402 r = ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
403 g = ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
404 b = ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
409 default_clut.clut256[i] = RGBA(r, g, b, a);
415 static av_cold int dvbsub_close_decoder(AVCodecContext *avctx)
417 DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
418 DVBSubRegionDisplay *display;
422 while (ctx->display_list) {
423 display = ctx->display_list;
424 ctx->display_list = display->next;
432 static int dvbsub_read_2bit_string(uint8_t *destbuf, int dbuf_len,
433 const uint8_t **srcbuf, int buf_size,
434 int non_mod, uint8_t *map_table)
442 init_get_bits(&gb, *srcbuf, buf_size << 3);
444 while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
445 bits = get_bits(&gb, 2);
448 if (non_mod != 1 || bits != 1) {
450 *destbuf++ = map_table[bits];
456 bits = get_bits1(&gb);
458 run_length = get_bits(&gb, 3) + 3;
459 bits = get_bits(&gb, 2);
461 if (non_mod == 1 && bits == 1)
462 pixels_read += run_length;
465 bits = map_table[bits];
466 while (run_length-- > 0 && pixels_read < dbuf_len) {
472 bits = get_bits1(&gb);
474 bits = get_bits(&gb, 2);
476 run_length = get_bits(&gb, 4) + 12;
477 bits = get_bits(&gb, 2);
479 if (non_mod == 1 && bits == 1)
480 pixels_read += run_length;
483 bits = map_table[bits];
484 while (run_length-- > 0 && pixels_read < dbuf_len) {
489 } else if (bits == 3) {
490 run_length = get_bits(&gb, 8) + 29;
491 bits = get_bits(&gb, 2);
493 if (non_mod == 1 && bits == 1)
494 pixels_read += run_length;
497 bits = map_table[bits];
498 while (run_length-- > 0 && pixels_read < dbuf_len) {
503 } else if (bits == 1) {
509 if (pixels_read <= dbuf_len) {
514 (*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
529 if (get_bits(&gb, 6))
530 av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n");
532 (*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
537 static int dvbsub_read_4bit_string(uint8_t *destbuf, int dbuf_len,
538 const uint8_t **srcbuf, int buf_size,
539 int non_mod, uint8_t *map_table)
547 init_get_bits(&gb, *srcbuf, buf_size << 3);
549 while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
550 bits = get_bits(&gb, 4);
553 if (non_mod != 1 || bits != 1) {
555 *destbuf++ = map_table[bits];
561 bits = get_bits1(&gb);
563 run_length = get_bits(&gb, 3);
565 if (run_length == 0) {
566 (*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
577 while (run_length-- > 0 && pixels_read < dbuf_len) {
582 bits = get_bits1(&gb);
584 run_length = get_bits(&gb, 2) + 4;
585 bits = get_bits(&gb, 4);
587 if (non_mod == 1 && bits == 1)
588 pixels_read += run_length;
591 bits = map_table[bits];
592 while (run_length-- > 0 && pixels_read < dbuf_len) {
598 bits = get_bits(&gb, 2);
600 run_length = get_bits(&gb, 4) + 9;
601 bits = get_bits(&gb, 4);
603 if (non_mod == 1 && bits == 1)
604 pixels_read += run_length;
607 bits = map_table[bits];
608 while (run_length-- > 0 && pixels_read < dbuf_len) {
613 } else if (bits == 3) {
614 run_length = get_bits(&gb, 8) + 25;
615 bits = get_bits(&gb, 4);
617 if (non_mod == 1 && bits == 1)
618 pixels_read += run_length;
621 bits = map_table[bits];
622 while (run_length-- > 0 && pixels_read < dbuf_len) {
627 } else if (bits == 1) {
633 if (pixels_read <= dbuf_len) {
650 if (get_bits(&gb, 8))
651 av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n");
653 (*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
658 static int dvbsub_read_8bit_string(uint8_t *destbuf, int dbuf_len,
659 const uint8_t **srcbuf, int buf_size,
660 int non_mod, uint8_t *map_table)
662 const uint8_t *sbuf_end = (*srcbuf) + buf_size;
667 while (*srcbuf < sbuf_end && pixels_read < dbuf_len) {
671 if (non_mod != 1 || bits != 1) {
673 *destbuf++ = map_table[bits];
680 run_length = bits & 0x7f;
681 if ((bits & 0x80) == 0) {
682 if (run_length == 0) {
690 while (run_length-- > 0 && pixels_read < dbuf_len) {
697 if (non_mod == 1 && bits == 1)
698 pixels_read += run_length;
700 bits = map_table[bits];
701 else while (run_length-- > 0 && pixels_read < dbuf_len) {
710 av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n");
717 static void dvbsub_parse_pixel_data_block(AVCodecContext *avctx, DVBSubObjectDisplay *display,
718 const uint8_t *buf, int buf_size, int top_bottom, int non_mod)
720 DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
722 DVBSubRegion *region = get_region(ctx, display->region_id);
723 const uint8_t *buf_end = buf + buf_size;
728 uint8_t map2to4[] = { 0x0, 0x7, 0x8, 0xf};
729 uint8_t map2to8[] = {0x00, 0x77, 0x88, 0xff};
730 uint8_t map4to8[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
731 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff};
734 dprintf(avctx, "DVB pixel block size %d, %s field:\n", buf_size,
735 top_bottom ? "bottom" : "top");
737 #ifdef DEBUG_PACKET_CONTENTS
738 for (i = 0; i < buf_size; i++) {
740 av_log(avctx, AV_LOG_INFO, "0x%08p: ", buf+i);
742 av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
744 av_log(avctx, AV_LOG_INFO, "\n");
748 av_log(avctx, AV_LOG_INFO, "\n");
757 x_pos = display->x_pos;
758 y_pos = display->y_pos;
760 if ((y_pos & 1) != top_bottom)
763 while (buf < buf_end) {
764 if (x_pos > region->width || y_pos > region->height) {
765 av_log(avctx, AV_LOG_ERROR, "Invalid object location!\n");
771 if (region->depth == 8)
773 else if (region->depth == 4)
778 x_pos += dvbsub_read_2bit_string(pbuf + (y_pos * region->width) + x_pos,
779 region->width - x_pos, &buf, buf_size,
783 if (region->depth < 4) {
784 av_log(avctx, AV_LOG_ERROR, "4-bit pixel string in %d-bit region!\n", region->depth);
788 if (region->depth == 8)
793 x_pos += dvbsub_read_4bit_string(pbuf + (y_pos * region->width) + x_pos,
794 region->width - x_pos, &buf, buf_size,
798 if (region->depth < 8) {
799 av_log(avctx, AV_LOG_ERROR, "8-bit pixel string in %d-bit region!\n", region->depth);
803 x_pos += dvbsub_read_8bit_string(pbuf + (y_pos * region->width) + x_pos,
804 region->width - x_pos, &buf, buf_size,
809 map2to4[0] = (*buf) >> 4;
810 map2to4[1] = (*buf++) & 0xf;
811 map2to4[2] = (*buf) >> 4;
812 map2to4[3] = (*buf++) & 0xf;
815 for (i = 0; i < 4; i++)
819 for (i = 0; i < 16; i++)
824 x_pos = display->x_pos;
828 av_log(avctx, AV_LOG_INFO, "Unknown/unsupported pixel block 0x%x\n", *(buf-1));
834 static void dvbsub_parse_object_segment(AVCodecContext *avctx,
835 const uint8_t *buf, int buf_size)
837 DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
839 const uint8_t *buf_end = buf + buf_size;
840 const uint8_t *block;
842 DVBSubObject *object;
843 DVBSubObjectDisplay *display;
844 int top_field_len, bottom_field_len;
846 int coding_method, non_modifying_color;
848 object_id = AV_RB16(buf);
851 object = get_object(ctx, object_id);
856 coding_method = ((*buf) >> 2) & 3;
857 non_modifying_color = ((*buf++) >> 1) & 1;
859 if (coding_method == 0) {
860 top_field_len = AV_RB16(buf);
862 bottom_field_len = AV_RB16(buf);
865 if (buf + top_field_len + bottom_field_len > buf_end) {
866 av_log(avctx, AV_LOG_ERROR, "Field data size too large\n");
870 for (display = object->display_list; display; display = display->object_list_next) {
873 dvbsub_parse_pixel_data_block(avctx, display, block, top_field_len, 0,
874 non_modifying_color);
876 if (bottom_field_len > 0)
877 block = buf + top_field_len;
879 bottom_field_len = top_field_len;
881 dvbsub_parse_pixel_data_block(avctx, display, block, bottom_field_len, 1,
882 non_modifying_color);
885 /* } else if (coding_method == 1) {*/
888 av_log(avctx, AV_LOG_ERROR, "Unknown object coding %d\n", coding_method);
893 static void dvbsub_parse_clut_segment(AVCodecContext *avctx,
894 const uint8_t *buf, int buf_size)
896 DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
898 const uint8_t *buf_end = buf + buf_size;
901 int entry_id, depth , full_range;
902 int y, cr, cb, alpha;
903 int r, g, b, r_add, g_add, b_add;
905 #ifdef DEBUG_PACKET_CONTENTS
908 av_log(avctx, AV_LOG_INFO, "DVB clut packet:\n");
910 for (i=0; i < buf_size; i++) {
911 av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
913 av_log(avctx, AV_LOG_INFO, "\n");
917 av_log(avctx, AV_LOG_INFO, "\n");
924 clut = get_clut(ctx, clut_id);
927 clut = av_malloc(sizeof(DVBSubCLUT));
929 memcpy(clut, &default_clut, sizeof(DVBSubCLUT));
933 clut->next = ctx->clut_list;
934 ctx->clut_list = clut;
937 while (buf + 4 < buf_end) {
940 depth = (*buf) & 0xe0;
943 av_log(avctx, AV_LOG_ERROR, "Invalid clut depth 0x%x!\n", *buf);
947 full_range = (*buf++) & 1;
956 cr = (((buf[0] & 3) << 2) | ((buf[1] >> 6) & 3)) << 4;
957 cb = (buf[1] << 2) & 0xf0;
958 alpha = (buf[1] << 6) & 0xc0;
966 YUV_TO_RGB1_CCIR(cb, cr);
967 YUV_TO_RGB2_CCIR(r, g, b, y);
969 dprintf(avctx, "clut %d := (%d,%d,%d,%d)\n", entry_id, r, g, b, alpha);
972 clut->clut4[entry_id] = RGBA(r,g,b,255 - alpha);
974 clut->clut16[entry_id] = RGBA(r,g,b,255 - alpha);
976 clut->clut256[entry_id] = RGBA(r,g,b,255 - alpha);
981 static void dvbsub_parse_region_segment(AVCodecContext *avctx,
982 const uint8_t *buf, int buf_size)
984 DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
986 const uint8_t *buf_end = buf + buf_size;
987 int region_id, object_id;
988 DVBSubRegion *region;
989 DVBSubObject *object;
990 DVBSubObjectDisplay *display;
998 region = get_region(ctx, region_id);
1001 region = av_mallocz(sizeof(DVBSubRegion));
1003 region->id = region_id;
1005 region->next = ctx->region_list;
1006 ctx->region_list = region;
1009 fill = ((*buf++) >> 3) & 1;
1011 region->width = AV_RB16(buf);
1013 region->height = AV_RB16(buf);
1016 if (region->width * region->height != region->buf_size) {
1018 av_free(region->pbuf);
1020 region->buf_size = region->width * region->height;
1022 region->pbuf = av_malloc(region->buf_size);
1027 region->depth = 1 << (((*buf++) >> 2) & 7);
1028 if(region->depth<2 || region->depth>8){
1029 av_log(avctx, AV_LOG_ERROR, "region depth %d is invalid\n", region->depth);
1032 region->clut = *buf++;
1034 if (region->depth == 8)
1035 region->bgcolor = *buf++;
1039 if (region->depth == 4)
1040 region->bgcolor = (((*buf++) >> 4) & 15);
1042 region->bgcolor = (((*buf++) >> 2) & 3);
1045 dprintf(avctx, "Region %d, (%dx%d)\n", region_id, region->width, region->height);
1048 memset(region->pbuf, region->bgcolor, region->buf_size);
1049 dprintf(avctx, "Fill region (%d)\n", region->bgcolor);
1052 delete_region_display_list(ctx, region);
1054 while (buf + 5 < buf_end) {
1055 object_id = AV_RB16(buf);
1058 object = get_object(ctx, object_id);
1061 object = av_mallocz(sizeof(DVBSubObject));
1063 object->id = object_id;
1064 object->next = ctx->object_list;
1065 ctx->object_list = object;
1068 object->type = (*buf) >> 6;
1070 display = av_mallocz(sizeof(DVBSubObjectDisplay));
1072 display->object_id = object_id;
1073 display->region_id = region_id;
1075 display->x_pos = AV_RB16(buf) & 0xfff;
1077 display->y_pos = AV_RB16(buf) & 0xfff;
1080 if ((object->type == 1 || object->type == 2) && buf+1 < buf_end) {
1081 display->fgcolor = *buf++;
1082 display->bgcolor = *buf++;
1085 display->region_list_next = region->display_list;
1086 region->display_list = display;
1088 display->object_list_next = object->display_list;
1089 object->display_list = display;
1093 static void dvbsub_parse_page_segment(AVCodecContext *avctx,
1094 const uint8_t *buf, int buf_size)
1096 DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
1097 DVBSubRegionDisplay *display;
1098 DVBSubRegionDisplay *tmp_display_list, **tmp_ptr;
1100 const uint8_t *buf_end = buf + buf_size;
1107 ctx->time_out = *buf++;
1108 page_state = ((*buf++) >> 2) & 3;
1110 dprintf(avctx, "Page time out %ds, state %d\n", ctx->time_out, page_state);
1112 if (page_state == 2) {
1116 tmp_display_list = ctx->display_list;
1117 ctx->display_list = NULL;
1118 ctx->display_list_size = 0;
1120 while (buf + 5 < buf_end) {
1124 display = tmp_display_list;
1125 tmp_ptr = &tmp_display_list;
1127 while (display && display->region_id != region_id) {
1128 tmp_ptr = &display->next;
1129 display = display->next;
1133 display = av_mallocz(sizeof(DVBSubRegionDisplay));
1135 display->region_id = region_id;
1137 display->x_pos = AV_RB16(buf);
1139 display->y_pos = AV_RB16(buf);
1142 *tmp_ptr = display->next;
1144 display->next = ctx->display_list;
1145 ctx->display_list = display;
1146 ctx->display_list_size++;
1148 dprintf(avctx, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos);
1151 while (tmp_display_list) {
1152 display = tmp_display_list;
1154 tmp_display_list = display->next;
1162 #ifdef DEBUG_SAVE_IMAGES
1163 static void save_display_set(DVBSubContext *ctx)
1165 DVBSubRegion *region;
1166 DVBSubRegionDisplay *display;
1168 uint32_t *clut_table;
1169 int x_pos, y_pos, width, height;
1170 int x, y, y_off, x_off;
1173 static int fileno_index = 0;
1180 for (display = ctx->display_list; display; display = display->next) {
1181 region = get_region(ctx, display->region_id);
1184 x_pos = display->x_pos;
1185 y_pos = display->y_pos;
1186 width = region->width;
1187 height = region->height;
1189 if (display->x_pos < x_pos) {
1190 width += (x_pos - display->x_pos);
1191 x_pos = display->x_pos;
1194 if (display->y_pos < y_pos) {
1195 height += (y_pos - display->y_pos);
1196 y_pos = display->y_pos;
1199 if (display->x_pos + region->width > x_pos + width) {
1200 width = display->x_pos + region->width - x_pos;
1203 if (display->y_pos + region->height > y_pos + height) {
1204 height = display->y_pos + region->height - y_pos;
1211 pbuf = av_malloc(width * height * 4);
1213 for (display = ctx->display_list; display; display = display->next) {
1214 region = get_region(ctx, display->region_id);
1216 x_off = display->x_pos - x_pos;
1217 y_off = display->y_pos - y_pos;
1219 clut = get_clut(ctx, region->clut);
1222 clut = &default_clut;
1224 switch (region->depth) {
1226 clut_table = clut->clut4;
1229 clut_table = clut->clut256;
1233 clut_table = clut->clut16;
1237 for (y = 0; y < region->height; y++) {
1238 for (x = 0; x < region->width; x++) {
1239 pbuf[((y + y_off) * width) + x_off + x] =
1240 clut_table[region->pbuf[y * region->width + x]];
1246 snprintf(filename, sizeof(filename), "dvbs.%d", fileno_index);
1248 png_save2(filename, pbuf, width, height);
1257 static int dvbsub_display_end_segment(AVCodecContext *avctx, const uint8_t *buf,
1258 int buf_size, AVSubtitle *sub)
1260 DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
1262 DVBSubRegion *region;
1263 DVBSubRegionDisplay *display;
1264 AVSubtitleRect *rect;
1266 uint32_t *clut_table;
1270 sub->start_display_time = 0;
1271 sub->end_display_time = ctx->time_out * 1000;
1274 sub->num_rects = ctx->display_list_size;
1276 if (sub->num_rects > 0){
1277 sub->rects = av_mallocz(sizeof(*sub->rects) * sub->num_rects);
1278 for(i=0; i<sub->num_rects; i++)
1279 sub->rects[i] = av_mallocz(sizeof(*sub->rects[i]));
1284 for (display = ctx->display_list; display; display = display->next) {
1285 region = get_region(ctx, display->region_id);
1286 rect = sub->rects[i];
1291 rect->x = display->x_pos;
1292 rect->y = display->y_pos;
1293 rect->w = region->width;
1294 rect->h = region->height;
1295 rect->nb_colors = 16;
1296 rect->type = SUBTITLE_BITMAP;
1297 rect->pict.linesize[0] = region->width;
1299 clut = get_clut(ctx, region->clut);
1302 clut = &default_clut;
1304 switch (region->depth) {
1306 clut_table = clut->clut4;
1309 clut_table = clut->clut256;
1313 clut_table = clut->clut16;
1317 rect->pict.data[1] = av_mallocz(AVPALETTE_SIZE);
1318 memcpy(rect->pict.data[1], clut_table, (1 << region->depth) * sizeof(uint32_t));
1320 rect->pict.data[0] = av_malloc(region->buf_size);
1321 memcpy(rect->pict.data[0], region->pbuf, region->buf_size);
1328 #ifdef DEBUG_SAVE_IMAGES
1329 save_display_set(ctx);
1335 static int dvbsub_decode(AVCodecContext *avctx,
1336 void *data, int *data_size,
1339 const uint8_t *buf = avpkt->data;
1340 int buf_size = avpkt->size;
1341 DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
1342 AVSubtitle *sub = (AVSubtitle*) data;
1343 const uint8_t *p, *p_end;
1348 #ifdef DEBUG_PACKET_CONTENTS
1351 av_log(avctx, AV_LOG_INFO, "DVB sub packet:\n");
1353 for (i=0; i < buf_size; i++) {
1354 av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
1356 av_log(avctx, AV_LOG_INFO, "\n");
1360 av_log(avctx, AV_LOG_INFO, "\n");
1368 p_end = buf + buf_size;
1370 while (p < p_end && *p == 0x0f) {
1372 segment_type = *p++;
1373 page_id = AV_RB16(p);
1375 segment_length = AV_RB16(p);
1378 if (page_id == ctx->composition_id || page_id == ctx->ancillary_id) {
1379 switch (segment_type) {
1380 case DVBSUB_PAGE_SEGMENT:
1381 dvbsub_parse_page_segment(avctx, p, segment_length);
1383 case DVBSUB_REGION_SEGMENT:
1384 dvbsub_parse_region_segment(avctx, p, segment_length);
1386 case DVBSUB_CLUT_SEGMENT:
1387 dvbsub_parse_clut_segment(avctx, p, segment_length);
1389 case DVBSUB_OBJECT_SEGMENT:
1390 dvbsub_parse_object_segment(avctx, p, segment_length);
1392 case DVBSUB_DISPLAY_SEGMENT:
1393 *data_size = dvbsub_display_end_segment(avctx, p, segment_length, sub);
1396 dprintf(avctx, "Subtitling segment type 0x%x, page id %d, length %d\n",
1397 segment_type, page_id, segment_length);
1402 p += segment_length;
1406 dprintf(avctx, "Junk at end of packet\n");
1414 AVCodec dvbsub_decoder = {
1416 CODEC_TYPE_SUBTITLE,
1417 CODEC_ID_DVB_SUBTITLE,
1418 sizeof(DVBSubContext),
1419 dvbsub_init_decoder,
1421 dvbsub_close_decoder,
1423 .long_name = NULL_IF_CONFIG_SMALL("DVB subtitles"),