ffmpeg / libavcodec / dvbsubdec.c @ d36beb3f
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/*
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* DVB subtitle decoding for ffmpeg
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* Copyright (c) 2005 Ian Caulfield
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h" |
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#include "dsputil.h" |
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#include "get_bits.h" |
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#include "bytestream.h" |
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#include "libavutil/colorspace.h" |
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//#define DEBUG
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//#define DEBUG_PACKET_CONTENTS
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//#define DEBUG_SAVE_IMAGES
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#define DVBSUB_PAGE_SEGMENT 0x10 |
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#define DVBSUB_REGION_SEGMENT 0x11 |
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#define DVBSUB_CLUT_SEGMENT 0x12 |
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#define DVBSUB_OBJECT_SEGMENT 0x13 |
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#define DVBSUB_DISPLAYDEFINITION_SEGMENT 0x14 |
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#define DVBSUB_DISPLAY_SEGMENT 0x80 |
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|
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#define cm (ff_cropTbl + MAX_NEG_CROP)
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#ifdef DEBUG_SAVE_IMAGES
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#undef fprintf
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#if 0
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static void png_save(const char *filename, uint8_t *bitmap, int w, int h,
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uint32_t *rgba_palette)
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{
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int x, y, v;
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FILE *f;
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char fname[40], fname2[40];
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char command[1024];
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snprintf(fname, 40, "%s.ppm", filename);
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f = fopen(fname, "w");
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if (!f) {
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perror(fname);
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exit(1);
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}
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fprintf(f, "P6\n"
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"%d %d\n"
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"%d\n",
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w, h, 255);
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for(y = 0; y < h; y++) {
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for(x = 0; x < w; x++) {
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v = rgba_palette[bitmap[y * w + x]];
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putc((v >> 16) & 0xff, f);
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putc((v >> 8) & 0xff, f);
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putc((v >> 0) & 0xff, f);
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}
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}
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fclose(f);
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snprintf(fname2, 40, "%s-a.pgm", filename);
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f = fopen(fname2, "w");
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if (!f) {
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perror(fname2);
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exit(1);
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}
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fprintf(f, "P5\n"
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"%d %d\n"
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"%d\n",
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w, h, 255);
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for(y = 0; y < h; y++) {
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for(x = 0; x < w; x++) {
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v = rgba_palette[bitmap[y * w + x]];
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putc((v >> 24) & 0xff, f);
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}
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}
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fclose(f);
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snprintf(command, 1024, "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename);
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system(command);
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snprintf(command, 1024, "rm %s %s", fname, fname2);
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system(command);
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}
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#endif
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static void png_save2(const char *filename, uint32_t *bitmap, int w, int h) |
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{
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int x, y, v;
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FILE *f; |
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char fname[40], fname2[40]; |
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char command[1024]; |
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snprintf(fname, sizeof(fname), "%s.ppm", filename); |
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f = fopen(fname, "w");
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if (!f) {
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perror(fname); |
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exit(1);
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} |
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fprintf(f, "P6\n"
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"%d %d\n"
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"%d\n",
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w, h, 255);
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for(y = 0; y < h; y++) { |
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for(x = 0; x < w; x++) { |
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v = bitmap[y * w + x]; |
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putc((v >> 16) & 0xff, f); |
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putc((v >> 8) & 0xff, f); |
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putc((v >> 0) & 0xff, f); |
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} |
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} |
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fclose(f); |
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snprintf(fname2, sizeof(fname2), "%s-a.pgm", filename); |
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f = fopen(fname2, "w");
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if (!f) {
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perror(fname2); |
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exit(1);
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} |
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fprintf(f, "P5\n"
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"%d %d\n"
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"%d\n",
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w, h, 255);
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for(y = 0; y < h; y++) { |
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for(x = 0; x < w; x++) { |
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v = bitmap[y * w + x]; |
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putc((v >> 24) & 0xff, f); |
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} |
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} |
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fclose(f); |
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snprintf(command, sizeof(command), "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename); |
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system(command); |
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snprintf(command, sizeof(command), "rm %s %s", fname, fname2); |
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system(command); |
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} |
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#endif
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#define RGBA(r,g,b,a) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b)) |
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typedef struct DVBSubCLUT { |
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int id;
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uint32_t clut4[4];
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uint32_t clut16[16];
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uint32_t clut256[256];
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struct DVBSubCLUT *next;
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} DVBSubCLUT; |
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static DVBSubCLUT default_clut;
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typedef struct DVBSubObjectDisplay { |
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int object_id;
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int region_id;
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int x_pos;
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int y_pos;
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int fgcolor;
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int bgcolor;
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struct DVBSubObjectDisplay *region_list_next;
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struct DVBSubObjectDisplay *object_list_next;
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} DVBSubObjectDisplay; |
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typedef struct DVBSubObject { |
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int id;
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int type;
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DVBSubObjectDisplay *display_list; |
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struct DVBSubObject *next;
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} DVBSubObject; |
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typedef struct DVBSubRegionDisplay { |
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int region_id;
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int x_pos;
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int y_pos;
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struct DVBSubRegionDisplay *next;
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} DVBSubRegionDisplay; |
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typedef struct DVBSubRegion { |
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int id;
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int width;
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int height;
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int depth;
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int clut;
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int bgcolor;
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uint8_t *pbuf; |
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int buf_size;
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DVBSubObjectDisplay *display_list; |
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struct DVBSubRegion *next;
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} DVBSubRegion; |
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typedef struct DVBSubDisplayDefinition { |
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int version;
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int x;
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int y;
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int width;
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int height;
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} DVBSubDisplayDefinition; |
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typedef struct DVBSubContext { |
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int composition_id;
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int ancillary_id;
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int time_out;
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DVBSubRegion *region_list; |
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DVBSubCLUT *clut_list; |
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DVBSubObject *object_list; |
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int display_list_size;
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DVBSubRegionDisplay *display_list; |
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DVBSubDisplayDefinition *display_definition; |
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} DVBSubContext; |
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static DVBSubObject* get_object(DVBSubContext *ctx, int object_id) |
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{
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DVBSubObject *ptr = ctx->object_list; |
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while (ptr && ptr->id != object_id) {
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ptr = ptr->next; |
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} |
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return ptr;
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} |
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static DVBSubCLUT* get_clut(DVBSubContext *ctx, int clut_id) |
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{
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DVBSubCLUT *ptr = ctx->clut_list; |
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while (ptr && ptr->id != clut_id) {
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ptr = ptr->next; |
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} |
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return ptr;
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} |
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static DVBSubRegion* get_region(DVBSubContext *ctx, int region_id) |
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{
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DVBSubRegion *ptr = ctx->region_list; |
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while (ptr && ptr->id != region_id) {
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ptr = ptr->next; |
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} |
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return ptr;
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} |
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static void delete_region_display_list(DVBSubContext *ctx, DVBSubRegion *region) |
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{
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DVBSubObject *object, *obj2, **obj2_ptr; |
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DVBSubObjectDisplay *display, *obj_disp, **obj_disp_ptr; |
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while (region->display_list) {
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display = region->display_list; |
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object = get_object(ctx, display->object_id); |
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if (object) {
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obj_disp_ptr = &object->display_list; |
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obj_disp = *obj_disp_ptr; |
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while (obj_disp && obj_disp != display) {
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obj_disp_ptr = &obj_disp->object_list_next; |
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obj_disp = *obj_disp_ptr; |
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} |
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if (obj_disp) {
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*obj_disp_ptr = obj_disp->object_list_next; |
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if (!object->display_list) {
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obj2_ptr = &ctx->object_list; |
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obj2 = *obj2_ptr; |
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while (obj2 != object) {
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assert(obj2); |
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obj2_ptr = &obj2->next; |
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obj2 = *obj2_ptr; |
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} |
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*obj2_ptr = obj2->next; |
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av_free(obj2); |
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} |
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} |
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} |
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region->display_list = display->region_list_next; |
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av_free(display); |
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} |
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|
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} |
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static void delete_state(DVBSubContext *ctx) |
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{
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DVBSubRegion *region; |
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DVBSubCLUT *clut; |
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while (ctx->region_list) {
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region = ctx->region_list; |
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ctx->region_list = region->next; |
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delete_region_display_list(ctx, region); |
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if (region->pbuf)
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av_free(region->pbuf); |
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av_free(region); |
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} |
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|
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while (ctx->clut_list) {
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clut = ctx->clut_list; |
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ctx->clut_list = clut->next; |
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av_free(clut); |
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} |
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av_freep(&ctx->display_definition); |
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|
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/* Should already be null */
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if (ctx->object_list)
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av_log(0, AV_LOG_ERROR, "Memory deallocation error!\n"); |
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} |
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|
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static av_cold int dvbsub_init_decoder(AVCodecContext *avctx) |
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{
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int i, r, g, b, a = 0; |
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DVBSubContext *ctx = avctx->priv_data; |
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|
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if (!avctx->extradata || avctx->extradata_size != 4) { |
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av_log(avctx, AV_LOG_WARNING, "Invalid extradata, subtitle streams may be combined!\n");
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ctx->composition_id = -1;
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ctx->ancillary_id = -1;
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} else {
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ctx->composition_id = AV_RB16(avctx->extradata); |
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ctx->ancillary_id = AV_RB16(avctx->extradata + 2);
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} |
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|
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default_clut.id = -1;
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default_clut.next = NULL;
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|
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default_clut.clut4[0] = RGBA( 0, 0, 0, 0); |
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default_clut.clut4[1] = RGBA(255, 255, 255, 255); |
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default_clut.clut4[2] = RGBA( 0, 0, 0, 255); |
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default_clut.clut4[3] = RGBA(127, 127, 127, 255); |
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|
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default_clut.clut16[0] = RGBA( 0, 0, 0, 0); |
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for (i = 1; i < 16; i++) { |
| 380 |
if (i < 8) { |
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r = (i & 1) ? 255 : 0; |
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g = (i & 2) ? 255 : 0; |
| 383 |
b = (i & 4) ? 255 : 0; |
| 384 |
} else {
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r = (i & 1) ? 127 : 0; |
| 386 |
g = (i & 2) ? 127 : 0; |
| 387 |
b = (i & 4) ? 127 : 0; |
| 388 |
} |
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default_clut.clut16[i] = RGBA(r, g, b, 255);
|
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} |
| 391 |
|
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default_clut.clut256[0] = RGBA( 0, 0, 0, 0); |
| 393 |
for (i = 1; i < 256; i++) { |
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if (i < 8) { |
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r = (i & 1) ? 255 : 0; |
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g = (i & 2) ? 255 : 0; |
| 397 |
b = (i & 4) ? 255 : 0; |
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a = 63;
|
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} else {
|
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switch (i & 0x88) { |
| 401 |
case 0x00: |
| 402 |
r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0); |
| 403 |
g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0); |
| 404 |
b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0); |
| 405 |
a = 255;
|
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break;
|
| 407 |
case 0x08: |
| 408 |
r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0); |
| 409 |
g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0); |
| 410 |
b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0); |
| 411 |
a = 127;
|
| 412 |
break;
|
| 413 |
case 0x80: |
| 414 |
r = 127 + ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0); |
| 415 |
g = 127 + ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0); |
| 416 |
b = 127 + ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0); |
| 417 |
a = 255;
|
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break;
|
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case 0x88: |
| 420 |
r = ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0); |
| 421 |
g = ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0); |
| 422 |
b = ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0); |
| 423 |
a = 255;
|
| 424 |
break;
|
| 425 |
} |
| 426 |
} |
| 427 |
default_clut.clut256[i] = RGBA(r, g, b, a); |
| 428 |
} |
| 429 |
|
| 430 |
return 0; |
| 431 |
} |
| 432 |
|
| 433 |
static av_cold int dvbsub_close_decoder(AVCodecContext *avctx) |
| 434 |
{
|
| 435 |
DVBSubContext *ctx = avctx->priv_data; |
| 436 |
DVBSubRegionDisplay *display; |
| 437 |
|
| 438 |
delete_state(ctx); |
| 439 |
|
| 440 |
while (ctx->display_list) {
|
| 441 |
display = ctx->display_list; |
| 442 |
ctx->display_list = display->next; |
| 443 |
|
| 444 |
av_free(display); |
| 445 |
} |
| 446 |
|
| 447 |
return 0; |
| 448 |
} |
| 449 |
|
| 450 |
static int dvbsub_read_2bit_string(uint8_t *destbuf, int dbuf_len, |
| 451 |
const uint8_t **srcbuf, int buf_size, |
| 452 |
int non_mod, uint8_t *map_table)
|
| 453 |
{
|
| 454 |
GetBitContext gb; |
| 455 |
|
| 456 |
int bits;
|
| 457 |
int run_length;
|
| 458 |
int pixels_read = 0; |
| 459 |
|
| 460 |
init_get_bits(&gb, *srcbuf, buf_size << 3);
|
| 461 |
|
| 462 |
while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) { |
| 463 |
bits = get_bits(&gb, 2);
|
| 464 |
|
| 465 |
if (bits) {
|
| 466 |
if (non_mod != 1 || bits != 1) { |
| 467 |
if (map_table)
|
| 468 |
*destbuf++ = map_table[bits]; |
| 469 |
else
|
| 470 |
*destbuf++ = bits; |
| 471 |
} |
| 472 |
pixels_read++; |
| 473 |
} else {
|
| 474 |
bits = get_bits1(&gb); |
| 475 |
if (bits == 1) { |
| 476 |
run_length = get_bits(&gb, 3) + 3; |
| 477 |
bits = get_bits(&gb, 2);
|
| 478 |
|
| 479 |
if (non_mod == 1 && bits == 1) |
| 480 |
pixels_read += run_length; |
| 481 |
else {
|
| 482 |
if (map_table)
|
| 483 |
bits = map_table[bits]; |
| 484 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 485 |
*destbuf++ = bits; |
| 486 |
pixels_read++; |
| 487 |
} |
| 488 |
} |
| 489 |
} else {
|
| 490 |
bits = get_bits1(&gb); |
| 491 |
if (bits == 0) { |
| 492 |
bits = get_bits(&gb, 2);
|
| 493 |
if (bits == 2) { |
| 494 |
run_length = get_bits(&gb, 4) + 12; |
| 495 |
bits = get_bits(&gb, 2);
|
| 496 |
|
| 497 |
if (non_mod == 1 && bits == 1) |
| 498 |
pixels_read += run_length; |
| 499 |
else {
|
| 500 |
if (map_table)
|
| 501 |
bits = map_table[bits]; |
| 502 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 503 |
*destbuf++ = bits; |
| 504 |
pixels_read++; |
| 505 |
} |
| 506 |
} |
| 507 |
} else if (bits == 3) { |
| 508 |
run_length = get_bits(&gb, 8) + 29; |
| 509 |
bits = get_bits(&gb, 2);
|
| 510 |
|
| 511 |
if (non_mod == 1 && bits == 1) |
| 512 |
pixels_read += run_length; |
| 513 |
else {
|
| 514 |
if (map_table)
|
| 515 |
bits = map_table[bits]; |
| 516 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 517 |
*destbuf++ = bits; |
| 518 |
pixels_read++; |
| 519 |
} |
| 520 |
} |
| 521 |
} else if (bits == 1) { |
| 522 |
pixels_read += 2;
|
| 523 |
if (map_table)
|
| 524 |
bits = map_table[0];
|
| 525 |
else
|
| 526 |
bits = 0;
|
| 527 |
if (pixels_read <= dbuf_len) {
|
| 528 |
*destbuf++ = bits; |
| 529 |
*destbuf++ = bits; |
| 530 |
} |
| 531 |
} else {
|
| 532 |
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 533 |
return pixels_read;
|
| 534 |
} |
| 535 |
} else {
|
| 536 |
if (map_table)
|
| 537 |
bits = map_table[0];
|
| 538 |
else
|
| 539 |
bits = 0;
|
| 540 |
*destbuf++ = bits; |
| 541 |
pixels_read++; |
| 542 |
} |
| 543 |
} |
| 544 |
} |
| 545 |
} |
| 546 |
|
| 547 |
if (get_bits(&gb, 6)) |
| 548 |
av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
| 549 |
|
| 550 |
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 551 |
|
| 552 |
return pixels_read;
|
| 553 |
} |
| 554 |
|
| 555 |
static int dvbsub_read_4bit_string(uint8_t *destbuf, int dbuf_len, |
| 556 |
const uint8_t **srcbuf, int buf_size, |
| 557 |
int non_mod, uint8_t *map_table)
|
| 558 |
{
|
| 559 |
GetBitContext gb; |
| 560 |
|
| 561 |
int bits;
|
| 562 |
int run_length;
|
| 563 |
int pixels_read = 0; |
| 564 |
|
| 565 |
init_get_bits(&gb, *srcbuf, buf_size << 3);
|
| 566 |
|
| 567 |
while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) { |
| 568 |
bits = get_bits(&gb, 4);
|
| 569 |
|
| 570 |
if (bits) {
|
| 571 |
if (non_mod != 1 || bits != 1) { |
| 572 |
if (map_table)
|
| 573 |
*destbuf++ = map_table[bits]; |
| 574 |
else
|
| 575 |
*destbuf++ = bits; |
| 576 |
} |
| 577 |
pixels_read++; |
| 578 |
} else {
|
| 579 |
bits = get_bits1(&gb); |
| 580 |
if (bits == 0) { |
| 581 |
run_length = get_bits(&gb, 3);
|
| 582 |
|
| 583 |
if (run_length == 0) { |
| 584 |
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 585 |
return pixels_read;
|
| 586 |
} |
| 587 |
|
| 588 |
run_length += 2;
|
| 589 |
|
| 590 |
if (map_table)
|
| 591 |
bits = map_table[0];
|
| 592 |
else
|
| 593 |
bits = 0;
|
| 594 |
|
| 595 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 596 |
*destbuf++ = bits; |
| 597 |
pixels_read++; |
| 598 |
} |
| 599 |
} else {
|
| 600 |
bits = get_bits1(&gb); |
| 601 |
if (bits == 0) { |
| 602 |
run_length = get_bits(&gb, 2) + 4; |
| 603 |
bits = get_bits(&gb, 4);
|
| 604 |
|
| 605 |
if (non_mod == 1 && bits == 1) |
| 606 |
pixels_read += run_length; |
| 607 |
else {
|
| 608 |
if (map_table)
|
| 609 |
bits = map_table[bits]; |
| 610 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 611 |
*destbuf++ = bits; |
| 612 |
pixels_read++; |
| 613 |
} |
| 614 |
} |
| 615 |
} else {
|
| 616 |
bits = get_bits(&gb, 2);
|
| 617 |
if (bits == 2) { |
| 618 |
run_length = get_bits(&gb, 4) + 9; |
| 619 |
bits = get_bits(&gb, 4);
|
| 620 |
|
| 621 |
if (non_mod == 1 && bits == 1) |
| 622 |
pixels_read += run_length; |
| 623 |
else {
|
| 624 |
if (map_table)
|
| 625 |
bits = map_table[bits]; |
| 626 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 627 |
*destbuf++ = bits; |
| 628 |
pixels_read++; |
| 629 |
} |
| 630 |
} |
| 631 |
} else if (bits == 3) { |
| 632 |
run_length = get_bits(&gb, 8) + 25; |
| 633 |
bits = get_bits(&gb, 4);
|
| 634 |
|
| 635 |
if (non_mod == 1 && bits == 1) |
| 636 |
pixels_read += run_length; |
| 637 |
else {
|
| 638 |
if (map_table)
|
| 639 |
bits = map_table[bits]; |
| 640 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 641 |
*destbuf++ = bits; |
| 642 |
pixels_read++; |
| 643 |
} |
| 644 |
} |
| 645 |
} else if (bits == 1) { |
| 646 |
pixels_read += 2;
|
| 647 |
if (map_table)
|
| 648 |
bits = map_table[0];
|
| 649 |
else
|
| 650 |
bits = 0;
|
| 651 |
if (pixels_read <= dbuf_len) {
|
| 652 |
*destbuf++ = bits; |
| 653 |
*destbuf++ = bits; |
| 654 |
} |
| 655 |
} else {
|
| 656 |
if (map_table)
|
| 657 |
bits = map_table[0];
|
| 658 |
else
|
| 659 |
bits = 0;
|
| 660 |
*destbuf++ = bits; |
| 661 |
pixels_read ++; |
| 662 |
} |
| 663 |
} |
| 664 |
} |
| 665 |
} |
| 666 |
} |
| 667 |
|
| 668 |
if (get_bits(&gb, 8)) |
| 669 |
av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
| 670 |
|
| 671 |
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 672 |
|
| 673 |
return pixels_read;
|
| 674 |
} |
| 675 |
|
| 676 |
static int dvbsub_read_8bit_string(uint8_t *destbuf, int dbuf_len, |
| 677 |
const uint8_t **srcbuf, int buf_size, |
| 678 |
int non_mod, uint8_t *map_table)
|
| 679 |
{
|
| 680 |
const uint8_t *sbuf_end = (*srcbuf) + buf_size;
|
| 681 |
int bits;
|
| 682 |
int run_length;
|
| 683 |
int pixels_read = 0; |
| 684 |
|
| 685 |
while (*srcbuf < sbuf_end && pixels_read < dbuf_len) {
|
| 686 |
bits = *(*srcbuf)++; |
| 687 |
|
| 688 |
if (bits) {
|
| 689 |
if (non_mod != 1 || bits != 1) { |
| 690 |
if (map_table)
|
| 691 |
*destbuf++ = map_table[bits]; |
| 692 |
else
|
| 693 |
*destbuf++ = bits; |
| 694 |
} |
| 695 |
pixels_read++; |
| 696 |
} else {
|
| 697 |
bits = *(*srcbuf)++; |
| 698 |
run_length = bits & 0x7f;
|
| 699 |
if ((bits & 0x80) == 0) { |
| 700 |
if (run_length == 0) { |
| 701 |
return pixels_read;
|
| 702 |
} |
| 703 |
|
| 704 |
if (map_table)
|
| 705 |
bits = map_table[0];
|
| 706 |
else
|
| 707 |
bits = 0;
|
| 708 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 709 |
*destbuf++ = bits; |
| 710 |
pixels_read++; |
| 711 |
} |
| 712 |
} else {
|
| 713 |
bits = *(*srcbuf)++; |
| 714 |
|
| 715 |
if (non_mod == 1 && bits == 1) |
| 716 |
pixels_read += run_length; |
| 717 |
if (map_table)
|
| 718 |
bits = map_table[bits]; |
| 719 |
else while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 720 |
*destbuf++ = bits; |
| 721 |
pixels_read++; |
| 722 |
} |
| 723 |
} |
| 724 |
} |
| 725 |
} |
| 726 |
|
| 727 |
if (*(*srcbuf)++)
|
| 728 |
av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
| 729 |
|
| 730 |
return pixels_read;
|
| 731 |
} |
| 732 |
|
| 733 |
|
| 734 |
|
| 735 |
static void dvbsub_parse_pixel_data_block(AVCodecContext *avctx, DVBSubObjectDisplay *display, |
| 736 |
const uint8_t *buf, int buf_size, int top_bottom, int non_mod) |
| 737 |
{
|
| 738 |
DVBSubContext *ctx = avctx->priv_data; |
| 739 |
|
| 740 |
DVBSubRegion *region = get_region(ctx, display->region_id); |
| 741 |
const uint8_t *buf_end = buf + buf_size;
|
| 742 |
uint8_t *pbuf; |
| 743 |
int x_pos, y_pos;
|
| 744 |
int i;
|
| 745 |
|
| 746 |
uint8_t map2to4[] = { 0x0, 0x7, 0x8, 0xf};
|
| 747 |
uint8_t map2to8[] = {0x00, 0x77, 0x88, 0xff};
|
| 748 |
uint8_t map4to8[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
|
| 749 |
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}; |
| 750 |
uint8_t *map_table; |
| 751 |
|
| 752 |
dprintf(avctx, "DVB pixel block size %d, %s field:\n", buf_size,
|
| 753 |
top_bottom ? "bottom" : "top"); |
| 754 |
|
| 755 |
#ifdef DEBUG_PACKET_CONTENTS
|
| 756 |
for (i = 0; i < buf_size; i++) { |
| 757 |
if (i % 16 == 0) |
| 758 |
av_log(avctx, AV_LOG_INFO, "0x%08p: ", buf+i);
|
| 759 |
|
| 760 |
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
|
| 761 |
if (i % 16 == 15) |
| 762 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 763 |
} |
| 764 |
|
| 765 |
if (i % 16) |
| 766 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 767 |
|
| 768 |
#endif
|
| 769 |
|
| 770 |
if (region == 0) |
| 771 |
return;
|
| 772 |
|
| 773 |
pbuf = region->pbuf; |
| 774 |
|
| 775 |
x_pos = display->x_pos; |
| 776 |
y_pos = display->y_pos; |
| 777 |
|
| 778 |
if ((y_pos & 1) != top_bottom) |
| 779 |
y_pos++; |
| 780 |
|
| 781 |
while (buf < buf_end) {
|
| 782 |
if (x_pos > region->width || y_pos > region->height) {
|
| 783 |
av_log(avctx, AV_LOG_ERROR, "Invalid object location!\n");
|
| 784 |
return;
|
| 785 |
} |
| 786 |
|
| 787 |
switch (*buf++) {
|
| 788 |
case 0x10: |
| 789 |
if (region->depth == 8) |
| 790 |
map_table = map2to8; |
| 791 |
else if (region->depth == 4) |
| 792 |
map_table = map2to4; |
| 793 |
else
|
| 794 |
map_table = NULL;
|
| 795 |
|
| 796 |
x_pos += dvbsub_read_2bit_string(pbuf + (y_pos * region->width) + x_pos, |
| 797 |
region->width - x_pos, &buf, buf_size, |
| 798 |
non_mod, map_table); |
| 799 |
break;
|
| 800 |
case 0x11: |
| 801 |
if (region->depth < 4) { |
| 802 |
av_log(avctx, AV_LOG_ERROR, "4-bit pixel string in %d-bit region!\n", region->depth);
|
| 803 |
return;
|
| 804 |
} |
| 805 |
|
| 806 |
if (region->depth == 8) |
| 807 |
map_table = map4to8; |
| 808 |
else
|
| 809 |
map_table = NULL;
|
| 810 |
|
| 811 |
x_pos += dvbsub_read_4bit_string(pbuf + (y_pos * region->width) + x_pos, |
| 812 |
region->width - x_pos, &buf, buf_size, |
| 813 |
non_mod, map_table); |
| 814 |
break;
|
| 815 |
case 0x12: |
| 816 |
if (region->depth < 8) { |
| 817 |
av_log(avctx, AV_LOG_ERROR, "8-bit pixel string in %d-bit region!\n", region->depth);
|
| 818 |
return;
|
| 819 |
} |
| 820 |
|
| 821 |
x_pos += dvbsub_read_8bit_string(pbuf + (y_pos * region->width) + x_pos, |
| 822 |
region->width - x_pos, &buf, buf_size, |
| 823 |
non_mod, NULL);
|
| 824 |
break;
|
| 825 |
|
| 826 |
case 0x20: |
| 827 |
map2to4[0] = (*buf) >> 4; |
| 828 |
map2to4[1] = (*buf++) & 0xf; |
| 829 |
map2to4[2] = (*buf) >> 4; |
| 830 |
map2to4[3] = (*buf++) & 0xf; |
| 831 |
break;
|
| 832 |
case 0x21: |
| 833 |
for (i = 0; i < 4; i++) |
| 834 |
map2to8[i] = *buf++; |
| 835 |
break;
|
| 836 |
case 0x22: |
| 837 |
for (i = 0; i < 16; i++) |
| 838 |
map4to8[i] = *buf++; |
| 839 |
break;
|
| 840 |
|
| 841 |
case 0xf0: |
| 842 |
x_pos = display->x_pos; |
| 843 |
y_pos += 2;
|
| 844 |
break;
|
| 845 |
default:
|
| 846 |
av_log(avctx, AV_LOG_INFO, "Unknown/unsupported pixel block 0x%x\n", *(buf-1)); |
| 847 |
} |
| 848 |
} |
| 849 |
|
| 850 |
} |
| 851 |
|
| 852 |
static void dvbsub_parse_object_segment(AVCodecContext *avctx, |
| 853 |
const uint8_t *buf, int buf_size) |
| 854 |
{
|
| 855 |
DVBSubContext *ctx = avctx->priv_data; |
| 856 |
|
| 857 |
const uint8_t *buf_end = buf + buf_size;
|
| 858 |
const uint8_t *block;
|
| 859 |
int object_id;
|
| 860 |
DVBSubObject *object; |
| 861 |
DVBSubObjectDisplay *display; |
| 862 |
int top_field_len, bottom_field_len;
|
| 863 |
|
| 864 |
int coding_method, non_modifying_color;
|
| 865 |
|
| 866 |
object_id = AV_RB16(buf); |
| 867 |
buf += 2;
|
| 868 |
|
| 869 |
object = get_object(ctx, object_id); |
| 870 |
|
| 871 |
if (!object)
|
| 872 |
return;
|
| 873 |
|
| 874 |
coding_method = ((*buf) >> 2) & 3; |
| 875 |
non_modifying_color = ((*buf++) >> 1) & 1; |
| 876 |
|
| 877 |
if (coding_method == 0) { |
| 878 |
top_field_len = AV_RB16(buf); |
| 879 |
buf += 2;
|
| 880 |
bottom_field_len = AV_RB16(buf); |
| 881 |
buf += 2;
|
| 882 |
|
| 883 |
if (buf + top_field_len + bottom_field_len > buf_end) {
|
| 884 |
av_log(avctx, AV_LOG_ERROR, "Field data size too large\n");
|
| 885 |
return;
|
| 886 |
} |
| 887 |
|
| 888 |
for (display = object->display_list; display; display = display->object_list_next) {
|
| 889 |
block = buf; |
| 890 |
|
| 891 |
dvbsub_parse_pixel_data_block(avctx, display, block, top_field_len, 0,
|
| 892 |
non_modifying_color); |
| 893 |
|
| 894 |
if (bottom_field_len > 0) |
| 895 |
block = buf + top_field_len; |
| 896 |
else
|
| 897 |
bottom_field_len = top_field_len; |
| 898 |
|
| 899 |
dvbsub_parse_pixel_data_block(avctx, display, block, bottom_field_len, 1,
|
| 900 |
non_modifying_color); |
| 901 |
} |
| 902 |
|
| 903 |
/* } else if (coding_method == 1) {*/
|
| 904 |
|
| 905 |
} else {
|
| 906 |
av_log(avctx, AV_LOG_ERROR, "Unknown object coding %d\n", coding_method);
|
| 907 |
} |
| 908 |
|
| 909 |
} |
| 910 |
|
| 911 |
static void dvbsub_parse_clut_segment(AVCodecContext *avctx, |
| 912 |
const uint8_t *buf, int buf_size) |
| 913 |
{
|
| 914 |
DVBSubContext *ctx = avctx->priv_data; |
| 915 |
|
| 916 |
const uint8_t *buf_end = buf + buf_size;
|
| 917 |
int clut_id;
|
| 918 |
DVBSubCLUT *clut; |
| 919 |
int entry_id, depth , full_range;
|
| 920 |
int y, cr, cb, alpha;
|
| 921 |
int r, g, b, r_add, g_add, b_add;
|
| 922 |
|
| 923 |
#ifdef DEBUG_PACKET_CONTENTS
|
| 924 |
int i;
|
| 925 |
|
| 926 |
av_log(avctx, AV_LOG_INFO, "DVB clut packet:\n");
|
| 927 |
|
| 928 |
for (i=0; i < buf_size; i++) { |
| 929 |
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
|
| 930 |
if (i % 16 == 15) |
| 931 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 932 |
} |
| 933 |
|
| 934 |
if (i % 16) |
| 935 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 936 |
|
| 937 |
#endif
|
| 938 |
|
| 939 |
clut_id = *buf++; |
| 940 |
buf += 1;
|
| 941 |
|
| 942 |
clut = get_clut(ctx, clut_id); |
| 943 |
|
| 944 |
if (!clut) {
|
| 945 |
clut = av_malloc(sizeof(DVBSubCLUT));
|
| 946 |
|
| 947 |
memcpy(clut, &default_clut, sizeof(DVBSubCLUT));
|
| 948 |
|
| 949 |
clut->id = clut_id; |
| 950 |
|
| 951 |
clut->next = ctx->clut_list; |
| 952 |
ctx->clut_list = clut; |
| 953 |
} |
| 954 |
|
| 955 |
while (buf + 4 < buf_end) { |
| 956 |
entry_id = *buf++; |
| 957 |
|
| 958 |
depth = (*buf) & 0xe0;
|
| 959 |
|
| 960 |
if (depth == 0) { |
| 961 |
av_log(avctx, AV_LOG_ERROR, "Invalid clut depth 0x%x!\n", *buf);
|
| 962 |
return;
|
| 963 |
} |
| 964 |
|
| 965 |
full_range = (*buf++) & 1;
|
| 966 |
|
| 967 |
if (full_range) {
|
| 968 |
y = *buf++; |
| 969 |
cr = *buf++; |
| 970 |
cb = *buf++; |
| 971 |
alpha = *buf++; |
| 972 |
} else {
|
| 973 |
y = buf[0] & 0xfc; |
| 974 |
cr = (((buf[0] & 3) << 2) | ((buf[1] >> 6) & 3)) << 4; |
| 975 |
cb = (buf[1] << 2) & 0xf0; |
| 976 |
alpha = (buf[1] << 6) & 0xc0; |
| 977 |
|
| 978 |
buf += 2;
|
| 979 |
} |
| 980 |
|
| 981 |
if (y == 0) |
| 982 |
alpha = 0xff;
|
| 983 |
|
| 984 |
YUV_TO_RGB1_CCIR(cb, cr); |
| 985 |
YUV_TO_RGB2_CCIR(r, g, b, y); |
| 986 |
|
| 987 |
dprintf(avctx, "clut %d := (%d,%d,%d,%d)\n", entry_id, r, g, b, alpha);
|
| 988 |
|
| 989 |
if (depth & 0x80) |
| 990 |
clut->clut4[entry_id] = RGBA(r,g,b,255 - alpha);
|
| 991 |
if (depth & 0x40) |
| 992 |
clut->clut16[entry_id] = RGBA(r,g,b,255 - alpha);
|
| 993 |
if (depth & 0x20) |
| 994 |
clut->clut256[entry_id] = RGBA(r,g,b,255 - alpha);
|
| 995 |
} |
| 996 |
} |
| 997 |
|
| 998 |
|
| 999 |
static void dvbsub_parse_region_segment(AVCodecContext *avctx, |
| 1000 |
const uint8_t *buf, int buf_size) |
| 1001 |
{
|
| 1002 |
DVBSubContext *ctx = avctx->priv_data; |
| 1003 |
|
| 1004 |
const uint8_t *buf_end = buf + buf_size;
|
| 1005 |
int region_id, object_id;
|
| 1006 |
DVBSubRegion *region; |
| 1007 |
DVBSubObject *object; |
| 1008 |
DVBSubObjectDisplay *display; |
| 1009 |
int fill;
|
| 1010 |
|
| 1011 |
if (buf_size < 10) |
| 1012 |
return;
|
| 1013 |
|
| 1014 |
region_id = *buf++; |
| 1015 |
|
| 1016 |
region = get_region(ctx, region_id); |
| 1017 |
|
| 1018 |
if (!region) {
|
| 1019 |
region = av_mallocz(sizeof(DVBSubRegion));
|
| 1020 |
|
| 1021 |
region->id = region_id; |
| 1022 |
|
| 1023 |
region->next = ctx->region_list; |
| 1024 |
ctx->region_list = region; |
| 1025 |
} |
| 1026 |
|
| 1027 |
fill = ((*buf++) >> 3) & 1; |
| 1028 |
|
| 1029 |
region->width = AV_RB16(buf); |
| 1030 |
buf += 2;
|
| 1031 |
region->height = AV_RB16(buf); |
| 1032 |
buf += 2;
|
| 1033 |
|
| 1034 |
if (region->width * region->height != region->buf_size) {
|
| 1035 |
if (region->pbuf)
|
| 1036 |
av_free(region->pbuf); |
| 1037 |
|
| 1038 |
region->buf_size = region->width * region->height; |
| 1039 |
|
| 1040 |
region->pbuf = av_malloc(region->buf_size); |
| 1041 |
|
| 1042 |
fill = 1;
|
| 1043 |
} |
| 1044 |
|
| 1045 |
region->depth = 1 << (((*buf++) >> 2) & 7); |
| 1046 |
if(region->depth<2 || region->depth>8){ |
| 1047 |
av_log(avctx, AV_LOG_ERROR, "region depth %d is invalid\n", region->depth);
|
| 1048 |
region->depth= 4;
|
| 1049 |
} |
| 1050 |
region->clut = *buf++; |
| 1051 |
|
| 1052 |
if (region->depth == 8) |
| 1053 |
region->bgcolor = *buf++; |
| 1054 |
else {
|
| 1055 |
buf += 1;
|
| 1056 |
|
| 1057 |
if (region->depth == 4) |
| 1058 |
region->bgcolor = (((*buf++) >> 4) & 15); |
| 1059 |
else
|
| 1060 |
region->bgcolor = (((*buf++) >> 2) & 3); |
| 1061 |
} |
| 1062 |
|
| 1063 |
dprintf(avctx, "Region %d, (%dx%d)\n", region_id, region->width, region->height);
|
| 1064 |
|
| 1065 |
if (fill) {
|
| 1066 |
memset(region->pbuf, region->bgcolor, region->buf_size); |
| 1067 |
dprintf(avctx, "Fill region (%d)\n", region->bgcolor);
|
| 1068 |
} |
| 1069 |
|
| 1070 |
delete_region_display_list(ctx, region); |
| 1071 |
|
| 1072 |
while (buf + 5 < buf_end) { |
| 1073 |
object_id = AV_RB16(buf); |
| 1074 |
buf += 2;
|
| 1075 |
|
| 1076 |
object = get_object(ctx, object_id); |
| 1077 |
|
| 1078 |
if (!object) {
|
| 1079 |
object = av_mallocz(sizeof(DVBSubObject));
|
| 1080 |
|
| 1081 |
object->id = object_id; |
| 1082 |
object->next = ctx->object_list; |
| 1083 |
ctx->object_list = object; |
| 1084 |
} |
| 1085 |
|
| 1086 |
object->type = (*buf) >> 6;
|
| 1087 |
|
| 1088 |
display = av_mallocz(sizeof(DVBSubObjectDisplay));
|
| 1089 |
|
| 1090 |
display->object_id = object_id; |
| 1091 |
display->region_id = region_id; |
| 1092 |
|
| 1093 |
display->x_pos = AV_RB16(buf) & 0xfff;
|
| 1094 |
buf += 2;
|
| 1095 |
display->y_pos = AV_RB16(buf) & 0xfff;
|
| 1096 |
buf += 2;
|
| 1097 |
|
| 1098 |
if ((object->type == 1 || object->type == 2) && buf+1 < buf_end) { |
| 1099 |
display->fgcolor = *buf++; |
| 1100 |
display->bgcolor = *buf++; |
| 1101 |
} |
| 1102 |
|
| 1103 |
display->region_list_next = region->display_list; |
| 1104 |
region->display_list = display; |
| 1105 |
|
| 1106 |
display->object_list_next = object->display_list; |
| 1107 |
object->display_list = display; |
| 1108 |
} |
| 1109 |
} |
| 1110 |
|
| 1111 |
static void dvbsub_parse_page_segment(AVCodecContext *avctx, |
| 1112 |
const uint8_t *buf, int buf_size) |
| 1113 |
{
|
| 1114 |
DVBSubContext *ctx = avctx->priv_data; |
| 1115 |
DVBSubRegionDisplay *display; |
| 1116 |
DVBSubRegionDisplay *tmp_display_list, **tmp_ptr; |
| 1117 |
|
| 1118 |
const uint8_t *buf_end = buf + buf_size;
|
| 1119 |
int region_id;
|
| 1120 |
int page_state;
|
| 1121 |
|
| 1122 |
if (buf_size < 1) |
| 1123 |
return;
|
| 1124 |
|
| 1125 |
ctx->time_out = *buf++; |
| 1126 |
page_state = ((*buf++) >> 2) & 3; |
| 1127 |
|
| 1128 |
dprintf(avctx, "Page time out %ds, state %d\n", ctx->time_out, page_state);
|
| 1129 |
|
| 1130 |
if (page_state == 2) { |
| 1131 |
delete_state(ctx); |
| 1132 |
} |
| 1133 |
|
| 1134 |
tmp_display_list = ctx->display_list; |
| 1135 |
ctx->display_list = NULL;
|
| 1136 |
ctx->display_list_size = 0;
|
| 1137 |
|
| 1138 |
while (buf + 5 < buf_end) { |
| 1139 |
region_id = *buf++; |
| 1140 |
buf += 1;
|
| 1141 |
|
| 1142 |
display = tmp_display_list; |
| 1143 |
tmp_ptr = &tmp_display_list; |
| 1144 |
|
| 1145 |
while (display && display->region_id != region_id) {
|
| 1146 |
tmp_ptr = &display->next; |
| 1147 |
display = display->next; |
| 1148 |
} |
| 1149 |
|
| 1150 |
if (!display)
|
| 1151 |
display = av_mallocz(sizeof(DVBSubRegionDisplay));
|
| 1152 |
|
| 1153 |
display->region_id = region_id; |
| 1154 |
|
| 1155 |
display->x_pos = AV_RB16(buf); |
| 1156 |
buf += 2;
|
| 1157 |
display->y_pos = AV_RB16(buf); |
| 1158 |
buf += 2;
|
| 1159 |
|
| 1160 |
*tmp_ptr = display->next; |
| 1161 |
|
| 1162 |
display->next = ctx->display_list; |
| 1163 |
ctx->display_list = display; |
| 1164 |
ctx->display_list_size++; |
| 1165 |
|
| 1166 |
dprintf(avctx, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos);
|
| 1167 |
} |
| 1168 |
|
| 1169 |
while (tmp_display_list) {
|
| 1170 |
display = tmp_display_list; |
| 1171 |
|
| 1172 |
tmp_display_list = display->next; |
| 1173 |
|
| 1174 |
av_free(display); |
| 1175 |
} |
| 1176 |
|
| 1177 |
} |
| 1178 |
|
| 1179 |
|
| 1180 |
#ifdef DEBUG_SAVE_IMAGES
|
| 1181 |
static void save_display_set(DVBSubContext *ctx) |
| 1182 |
{
|
| 1183 |
DVBSubRegion *region; |
| 1184 |
DVBSubRegionDisplay *display; |
| 1185 |
DVBSubCLUT *clut; |
| 1186 |
uint32_t *clut_table; |
| 1187 |
int x_pos, y_pos, width, height;
|
| 1188 |
int x, y, y_off, x_off;
|
| 1189 |
uint32_t *pbuf; |
| 1190 |
char filename[32]; |
| 1191 |
static int fileno_index = 0; |
| 1192 |
|
| 1193 |
x_pos = -1;
|
| 1194 |
y_pos = -1;
|
| 1195 |
width = 0;
|
| 1196 |
height = 0;
|
| 1197 |
|
| 1198 |
for (display = ctx->display_list; display; display = display->next) {
|
| 1199 |
region = get_region(ctx, display->region_id); |
| 1200 |
|
| 1201 |
if (x_pos == -1) { |
| 1202 |
x_pos = display->x_pos; |
| 1203 |
y_pos = display->y_pos; |
| 1204 |
width = region->width; |
| 1205 |
height = region->height; |
| 1206 |
} else {
|
| 1207 |
if (display->x_pos < x_pos) {
|
| 1208 |
width += (x_pos - display->x_pos); |
| 1209 |
x_pos = display->x_pos; |
| 1210 |
} |
| 1211 |
|
| 1212 |
if (display->y_pos < y_pos) {
|
| 1213 |
height += (y_pos - display->y_pos); |
| 1214 |
y_pos = display->y_pos; |
| 1215 |
} |
| 1216 |
|
| 1217 |
if (display->x_pos + region->width > x_pos + width) {
|
| 1218 |
width = display->x_pos + region->width - x_pos; |
| 1219 |
} |
| 1220 |
|
| 1221 |
if (display->y_pos + region->height > y_pos + height) {
|
| 1222 |
height = display->y_pos + region->height - y_pos; |
| 1223 |
} |
| 1224 |
} |
| 1225 |
} |
| 1226 |
|
| 1227 |
if (x_pos >= 0) { |
| 1228 |
|
| 1229 |
pbuf = av_malloc(width * height * 4);
|
| 1230 |
|
| 1231 |
for (display = ctx->display_list; display; display = display->next) {
|
| 1232 |
region = get_region(ctx, display->region_id); |
| 1233 |
|
| 1234 |
x_off = display->x_pos - x_pos; |
| 1235 |
y_off = display->y_pos - y_pos; |
| 1236 |
|
| 1237 |
clut = get_clut(ctx, region->clut); |
| 1238 |
|
| 1239 |
if (clut == 0) |
| 1240 |
clut = &default_clut; |
| 1241 |
|
| 1242 |
switch (region->depth) {
|
| 1243 |
case 2: |
| 1244 |
clut_table = clut->clut4; |
| 1245 |
break;
|
| 1246 |
case 8: |
| 1247 |
clut_table = clut->clut256; |
| 1248 |
break;
|
| 1249 |
case 4: |
| 1250 |
default:
|
| 1251 |
clut_table = clut->clut16; |
| 1252 |
break;
|
| 1253 |
} |
| 1254 |
|
| 1255 |
for (y = 0; y < region->height; y++) { |
| 1256 |
for (x = 0; x < region->width; x++) { |
| 1257 |
pbuf[((y + y_off) * width) + x_off + x] = |
| 1258 |
clut_table[region->pbuf[y * region->width + x]]; |
| 1259 |
} |
| 1260 |
} |
| 1261 |
|
| 1262 |
} |
| 1263 |
|
| 1264 |
snprintf(filename, sizeof(filename), "dvbs.%d", fileno_index); |
| 1265 |
|
| 1266 |
png_save2(filename, pbuf, width, height); |
| 1267 |
|
| 1268 |
av_free(pbuf); |
| 1269 |
} |
| 1270 |
|
| 1271 |
fileno_index++; |
| 1272 |
} |
| 1273 |
#endif
|
| 1274 |
|
| 1275 |
static void dvbsub_parse_display_definition_segment(AVCodecContext *avctx, |
| 1276 |
const uint8_t *buf,
|
| 1277 |
int buf_size)
|
| 1278 |
{
|
| 1279 |
DVBSubContext *ctx = avctx->priv_data; |
| 1280 |
DVBSubDisplayDefinition *display_def = ctx->display_definition; |
| 1281 |
int dds_version, info_byte;
|
| 1282 |
|
| 1283 |
if (buf_size < 5) |
| 1284 |
return;
|
| 1285 |
|
| 1286 |
info_byte = bytestream_get_byte(&buf); |
| 1287 |
dds_version = info_byte >> 4;
|
| 1288 |
if (display_def && display_def->version == dds_version)
|
| 1289 |
return; // already have this display definition version |
| 1290 |
|
| 1291 |
if (!display_def) {
|
| 1292 |
display_def = av_mallocz(sizeof(*display_def));
|
| 1293 |
ctx->display_definition = display_def; |
| 1294 |
} |
| 1295 |
if (!display_def)
|
| 1296 |
return;
|
| 1297 |
|
| 1298 |
display_def->version = dds_version; |
| 1299 |
display_def->x = 0;
|
| 1300 |
display_def->y = 0;
|
| 1301 |
display_def->width = bytestream_get_be16(&buf) + 1;
|
| 1302 |
display_def->height = bytestream_get_be16(&buf) + 1;
|
| 1303 |
|
| 1304 |
if (buf_size < 13) |
| 1305 |
return;
|
| 1306 |
|
| 1307 |
if (info_byte & 1<<3) { // display_window_flag |
| 1308 |
display_def->x = bytestream_get_be16(&buf); |
| 1309 |
display_def->y = bytestream_get_be16(&buf); |
| 1310 |
display_def->width = bytestream_get_be16(&buf) - display_def->x + 1;
|
| 1311 |
display_def->height = bytestream_get_be16(&buf) - display_def->y + 1;
|
| 1312 |
} |
| 1313 |
} |
| 1314 |
|
| 1315 |
static int dvbsub_display_end_segment(AVCodecContext *avctx, const uint8_t *buf, |
| 1316 |
int buf_size, AVSubtitle *sub)
|
| 1317 |
{
|
| 1318 |
DVBSubContext *ctx = avctx->priv_data; |
| 1319 |
DVBSubDisplayDefinition *display_def = ctx->display_definition; |
| 1320 |
|
| 1321 |
DVBSubRegion *region; |
| 1322 |
DVBSubRegionDisplay *display; |
| 1323 |
AVSubtitleRect *rect; |
| 1324 |
DVBSubCLUT *clut; |
| 1325 |
uint32_t *clut_table; |
| 1326 |
int i;
|
| 1327 |
int offset_x=0, offset_y=0; |
| 1328 |
|
| 1329 |
sub->rects = NULL;
|
| 1330 |
sub->start_display_time = 0;
|
| 1331 |
sub->end_display_time = ctx->time_out * 1000;
|
| 1332 |
sub->format = 0;
|
| 1333 |
|
| 1334 |
if (display_def) {
|
| 1335 |
offset_x = display_def->x; |
| 1336 |
offset_y = display_def->y; |
| 1337 |
} |
| 1338 |
|
| 1339 |
sub->num_rects = ctx->display_list_size; |
| 1340 |
|
| 1341 |
if (sub->num_rects > 0){ |
| 1342 |
sub->rects = av_mallocz(sizeof(*sub->rects) * sub->num_rects);
|
| 1343 |
for(i=0; i<sub->num_rects; i++) |
| 1344 |
sub->rects[i] = av_mallocz(sizeof(*sub->rects[i]));
|
| 1345 |
} |
| 1346 |
|
| 1347 |
i = 0;
|
| 1348 |
|
| 1349 |
for (display = ctx->display_list; display; display = display->next) {
|
| 1350 |
region = get_region(ctx, display->region_id); |
| 1351 |
rect = sub->rects[i]; |
| 1352 |
|
| 1353 |
if (!region)
|
| 1354 |
continue;
|
| 1355 |
|
| 1356 |
rect->x = display->x_pos + offset_x; |
| 1357 |
rect->y = display->y_pos + offset_y; |
| 1358 |
rect->w = region->width; |
| 1359 |
rect->h = region->height; |
| 1360 |
rect->nb_colors = 16;
|
| 1361 |
rect->type = SUBTITLE_BITMAP; |
| 1362 |
rect->pict.linesize[0] = region->width;
|
| 1363 |
|
| 1364 |
clut = get_clut(ctx, region->clut); |
| 1365 |
|
| 1366 |
if (!clut)
|
| 1367 |
clut = &default_clut; |
| 1368 |
|
| 1369 |
switch (region->depth) {
|
| 1370 |
case 2: |
| 1371 |
clut_table = clut->clut4; |
| 1372 |
break;
|
| 1373 |
case 8: |
| 1374 |
clut_table = clut->clut256; |
| 1375 |
break;
|
| 1376 |
case 4: |
| 1377 |
default:
|
| 1378 |
clut_table = clut->clut16; |
| 1379 |
break;
|
| 1380 |
} |
| 1381 |
|
| 1382 |
rect->pict.data[1] = av_mallocz(AVPALETTE_SIZE);
|
| 1383 |
memcpy(rect->pict.data[1], clut_table, (1 << region->depth) * sizeof(uint32_t)); |
| 1384 |
|
| 1385 |
rect->pict.data[0] = av_malloc(region->buf_size);
|
| 1386 |
memcpy(rect->pict.data[0], region->pbuf, region->buf_size);
|
| 1387 |
|
| 1388 |
i++; |
| 1389 |
} |
| 1390 |
|
| 1391 |
sub->num_rects = i; |
| 1392 |
|
| 1393 |
#ifdef DEBUG_SAVE_IMAGES
|
| 1394 |
save_display_set(ctx); |
| 1395 |
#endif
|
| 1396 |
|
| 1397 |
return 1; |
| 1398 |
} |
| 1399 |
|
| 1400 |
static int dvbsub_decode(AVCodecContext *avctx, |
| 1401 |
void *data, int *data_size, |
| 1402 |
AVPacket *avpkt) |
| 1403 |
{
|
| 1404 |
const uint8_t *buf = avpkt->data;
|
| 1405 |
int buf_size = avpkt->size;
|
| 1406 |
DVBSubContext *ctx = avctx->priv_data; |
| 1407 |
AVSubtitle *sub = data; |
| 1408 |
const uint8_t *p, *p_end;
|
| 1409 |
int segment_type;
|
| 1410 |
int page_id;
|
| 1411 |
int segment_length;
|
| 1412 |
|
| 1413 |
#ifdef DEBUG_PACKET_CONTENTS
|
| 1414 |
int i;
|
| 1415 |
|
| 1416 |
av_log(avctx, AV_LOG_INFO, "DVB sub packet:\n");
|
| 1417 |
|
| 1418 |
for (i=0; i < buf_size; i++) { |
| 1419 |
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
|
| 1420 |
if (i % 16 == 15) |
| 1421 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 1422 |
} |
| 1423 |
|
| 1424 |
if (i % 16) |
| 1425 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 1426 |
|
| 1427 |
#endif
|
| 1428 |
|
| 1429 |
if (buf_size <= 2) |
| 1430 |
return -1; |
| 1431 |
|
| 1432 |
p = buf; |
| 1433 |
p_end = buf + buf_size; |
| 1434 |
|
| 1435 |
while (p < p_end && *p == 0x0f) { |
| 1436 |
p += 1;
|
| 1437 |
segment_type = *p++; |
| 1438 |
page_id = AV_RB16(p); |
| 1439 |
p += 2;
|
| 1440 |
segment_length = AV_RB16(p); |
| 1441 |
p += 2;
|
| 1442 |
|
| 1443 |
if (page_id == ctx->composition_id || page_id == ctx->ancillary_id ||
|
| 1444 |
ctx->composition_id == -1 || ctx->ancillary_id == -1) { |
| 1445 |
switch (segment_type) {
|
| 1446 |
case DVBSUB_PAGE_SEGMENT:
|
| 1447 |
dvbsub_parse_page_segment(avctx, p, segment_length); |
| 1448 |
break;
|
| 1449 |
case DVBSUB_REGION_SEGMENT:
|
| 1450 |
dvbsub_parse_region_segment(avctx, p, segment_length); |
| 1451 |
break;
|
| 1452 |
case DVBSUB_CLUT_SEGMENT:
|
| 1453 |
dvbsub_parse_clut_segment(avctx, p, segment_length); |
| 1454 |
break;
|
| 1455 |
case DVBSUB_OBJECT_SEGMENT:
|
| 1456 |
dvbsub_parse_object_segment(avctx, p, segment_length); |
| 1457 |
break;
|
| 1458 |
case DVBSUB_DISPLAYDEFINITION_SEGMENT:
|
| 1459 |
dvbsub_parse_display_definition_segment(avctx, p, segment_length); |
| 1460 |
case DVBSUB_DISPLAY_SEGMENT:
|
| 1461 |
*data_size = dvbsub_display_end_segment(avctx, p, segment_length, sub); |
| 1462 |
break;
|
| 1463 |
default:
|
| 1464 |
dprintf(avctx, "Subtitling segment type 0x%x, page id %d, length %d\n",
|
| 1465 |
segment_type, page_id, segment_length); |
| 1466 |
break;
|
| 1467 |
} |
| 1468 |
} |
| 1469 |
|
| 1470 |
p += segment_length; |
| 1471 |
} |
| 1472 |
|
| 1473 |
if (p != p_end) {
|
| 1474 |
dprintf(avctx, "Junk at end of packet\n");
|
| 1475 |
return -1; |
| 1476 |
} |
| 1477 |
|
| 1478 |
return buf_size;
|
| 1479 |
} |
| 1480 |
|
| 1481 |
|
| 1482 |
AVCodec ff_dvbsub_decoder = {
|
| 1483 |
"dvbsub",
|
| 1484 |
AVMEDIA_TYPE_SUBTITLE, |
| 1485 |
CODEC_ID_DVB_SUBTITLE, |
| 1486 |
sizeof(DVBSubContext),
|
| 1487 |
dvbsub_init_decoder, |
| 1488 |
NULL,
|
| 1489 |
dvbsub_close_decoder, |
| 1490 |
dvbsub_decode, |
| 1491 |
.long_name = NULL_IF_CONFIG_SMALL("DVB subtitles"),
|
| 1492 |
}; |