ffmpeg / libavcodec / dvbsubdec.c @ 5509bffa
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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 library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; 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 "bitstream.h" |
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|
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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_DISPLAY_SEGMENT 0x80 |
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static unsigned char *cm; |
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|
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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, 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 = 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 = 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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#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 fgcolour;
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int bgcolour;
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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 bgcolour;
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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 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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} 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 != NULL && 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 != NULL && 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 != NULL && 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 != NULL) { |
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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 != NULL) { |
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obj_disp = object->display_list; |
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obj_disp_ptr = &object->display_list; |
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while (obj_disp != NULL && obj_disp != display) { |
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obj_disp_ptr = &obj_disp->object_list_next; |
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obj_disp = obj_disp->object_list_next; |
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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 == NULL) { |
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obj2 = ctx->object_list; |
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obj2_ptr = &ctx->object_list; |
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while (obj2 != NULL && obj2 != object) { |
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obj2_ptr = &obj2->next; |
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obj2 = obj2->next; |
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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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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 != NULL) |
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{
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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 != NULL) |
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av_free(region->pbuf); |
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av_free(region); |
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} |
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while (ctx->clut_list != NULL) |
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{
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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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/* Should already be null */
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if (ctx->object_list != NULL) |
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av_log(0, AV_LOG_ERROR, "Memory deallocation error!\n"); |
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} |
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static 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 = (DVBSubContext*) avctx->priv_data; |
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cm = cropTbl + MAX_NEG_CROP; |
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memset(avctx->priv_data, 0, sizeof(DVBSubContext)); |
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ctx->composition_id = avctx->sub_id & 0xffff;
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ctx->ancillary_id = avctx->sub_id >> 16;
|
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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++) { |
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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; |
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b = (i & 4) ? 255 : 0; |
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} else {
|
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r = (i & 1) ? 127 : 0; |
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g = (i & 2) ? 127 : 0; |
| 369 |
b = (i & 4) ? 127 : 0; |
| 370 |
} |
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default_clut.clut16[i] = RGBA(r, g, b, 255);
|
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} |
| 373 |
|
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default_clut.clut256[0] = RGBA( 0, 0, 0, 0); |
| 375 |
for (i = 1; i < 256; i++) { |
| 376 |
if (i < 8) { |
| 377 |
r = (i & 1) ? 255 : 0; |
| 378 |
g = (i & 2) ? 255 : 0; |
| 379 |
b = (i & 4) ? 255 : 0; |
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a = 63;
|
| 381 |
} else {
|
| 382 |
switch (i & 0x88) { |
| 383 |
case 0x00: |
| 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); |
| 387 |
a = 255;
|
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break;
|
| 389 |
case 0x08: |
| 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); |
| 393 |
a = 127;
|
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break;
|
| 395 |
case 0x80: |
| 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); |
| 399 |
a = 255;
|
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break;
|
| 401 |
case 0x88: |
| 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); |
| 405 |
a = 255;
|
| 406 |
break;
|
| 407 |
} |
| 408 |
} |
| 409 |
default_clut.clut256[i] = RGBA(r, g, b, a); |
| 410 |
} |
| 411 |
|
| 412 |
return 0; |
| 413 |
} |
| 414 |
|
| 415 |
static int dvbsub_close_decoder(AVCodecContext *avctx) |
| 416 |
{
|
| 417 |
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
| 418 |
DVBSubRegionDisplay *display; |
| 419 |
|
| 420 |
delete_state(ctx); |
| 421 |
|
| 422 |
while (ctx->display_list != NULL) |
| 423 |
{
|
| 424 |
display = ctx->display_list; |
| 425 |
ctx->display_list = display->next; |
| 426 |
|
| 427 |
av_free(display); |
| 428 |
} |
| 429 |
|
| 430 |
return 0; |
| 431 |
} |
| 432 |
|
| 433 |
static int dvbsub_read_2bit_string(uint8_t *destbuf, int dbuf_len, |
| 434 |
uint8_t **srcbuf, int buf_size,
|
| 435 |
int non_mod, uint8_t *map_table)
|
| 436 |
{
|
| 437 |
GetBitContext gb; |
| 438 |
|
| 439 |
int bits;
|
| 440 |
int run_length;
|
| 441 |
int pixels_read = 0; |
| 442 |
|
| 443 |
init_get_bits(&gb, *srcbuf, buf_size << 8);
|
| 444 |
|
| 445 |
while (get_bits_count(&gb) < (buf_size << 8) && pixels_read < dbuf_len) { |
| 446 |
bits = get_bits(&gb, 2);
|
| 447 |
|
| 448 |
if (bits != 0) { |
| 449 |
if (non_mod != 1 || bits != 1) { |
| 450 |
if (map_table != NULL) |
| 451 |
*destbuf++ = map_table[bits]; |
| 452 |
else
|
| 453 |
*destbuf++ = bits; |
| 454 |
} |
| 455 |
pixels_read++; |
| 456 |
} else {
|
| 457 |
bits = get_bits(&gb, 1);
|
| 458 |
if (bits == 1) { |
| 459 |
run_length = get_bits(&gb, 3) + 3; |
| 460 |
bits = get_bits(&gb, 2);
|
| 461 |
|
| 462 |
if (non_mod == 1 && bits == 1) |
| 463 |
pixels_read += run_length; |
| 464 |
else {
|
| 465 |
if (map_table != NULL) |
| 466 |
bits = map_table[bits]; |
| 467 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 468 |
*destbuf++ = bits; |
| 469 |
pixels_read++; |
| 470 |
} |
| 471 |
} |
| 472 |
} else {
|
| 473 |
bits = get_bits(&gb, 1);
|
| 474 |
if (bits == 0) { |
| 475 |
bits = get_bits(&gb, 2);
|
| 476 |
if (bits == 2) { |
| 477 |
run_length = get_bits(&gb, 4) + 12; |
| 478 |
bits = get_bits(&gb, 2);
|
| 479 |
|
| 480 |
if (non_mod == 1 && bits == 1) |
| 481 |
pixels_read += run_length; |
| 482 |
else {
|
| 483 |
if (map_table != NULL) |
| 484 |
bits = map_table[bits]; |
| 485 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 486 |
*destbuf++ = bits; |
| 487 |
pixels_read++; |
| 488 |
} |
| 489 |
} |
| 490 |
} else if (bits == 3) { |
| 491 |
run_length = get_bits(&gb, 8) + 29; |
| 492 |
bits = get_bits(&gb, 2);
|
| 493 |
|
| 494 |
if (non_mod == 1 && bits == 1) |
| 495 |
pixels_read += run_length; |
| 496 |
else {
|
| 497 |
if (map_table != NULL) |
| 498 |
bits = map_table[bits]; |
| 499 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 500 |
*destbuf++ = bits; |
| 501 |
pixels_read++; |
| 502 |
} |
| 503 |
} |
| 504 |
} else if (bits == 1) { |
| 505 |
pixels_read += 2;
|
| 506 |
if (map_table != NULL) |
| 507 |
bits = map_table[0];
|
| 508 |
else
|
| 509 |
bits = 0;
|
| 510 |
if (pixels_read <= dbuf_len) {
|
| 511 |
*destbuf++ = bits; |
| 512 |
*destbuf++ = bits; |
| 513 |
} |
| 514 |
} else {
|
| 515 |
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 516 |
return pixels_read;
|
| 517 |
} |
| 518 |
} else {
|
| 519 |
if (map_table != NULL) |
| 520 |
bits = map_table[0];
|
| 521 |
else
|
| 522 |
bits = 0;
|
| 523 |
*destbuf++ = bits; |
| 524 |
pixels_read++; |
| 525 |
} |
| 526 |
} |
| 527 |
} |
| 528 |
} |
| 529 |
|
| 530 |
if (get_bits(&gb, 6) != 0) |
| 531 |
av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
| 532 |
|
| 533 |
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 534 |
|
| 535 |
return pixels_read;
|
| 536 |
} |
| 537 |
|
| 538 |
static int dvbsub_read_4bit_string(uint8_t *destbuf, int dbuf_len, |
| 539 |
uint8_t **srcbuf, int buf_size,
|
| 540 |
int non_mod, uint8_t *map_table)
|
| 541 |
{
|
| 542 |
GetBitContext gb; |
| 543 |
|
| 544 |
int bits;
|
| 545 |
int run_length;
|
| 546 |
int pixels_read = 0; |
| 547 |
|
| 548 |
init_get_bits(&gb, *srcbuf, buf_size << 8);
|
| 549 |
|
| 550 |
while (get_bits_count(&gb) < (buf_size << 8) && pixels_read < dbuf_len) { |
| 551 |
bits = get_bits(&gb, 4);
|
| 552 |
|
| 553 |
if (bits != 0) { |
| 554 |
if (non_mod != 1 || bits != 1) { |
| 555 |
if (map_table != NULL) |
| 556 |
*destbuf++ = map_table[bits]; |
| 557 |
else
|
| 558 |
*destbuf++ = bits; |
| 559 |
} |
| 560 |
pixels_read++; |
| 561 |
} else {
|
| 562 |
bits = get_bits(&gb, 1);
|
| 563 |
if (bits == 0) { |
| 564 |
run_length = get_bits(&gb, 3);
|
| 565 |
|
| 566 |
if (run_length == 0) { |
| 567 |
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 568 |
return pixels_read;
|
| 569 |
} |
| 570 |
|
| 571 |
run_length += 2;
|
| 572 |
|
| 573 |
if (map_table != NULL) |
| 574 |
bits = map_table[0];
|
| 575 |
else
|
| 576 |
bits = 0;
|
| 577 |
|
| 578 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 579 |
*destbuf++ = bits; |
| 580 |
pixels_read++; |
| 581 |
} |
| 582 |
} else {
|
| 583 |
bits = get_bits(&gb, 1);
|
| 584 |
if (bits == 0) { |
| 585 |
run_length = get_bits(&gb, 2) + 4; |
| 586 |
bits = get_bits(&gb, 4);
|
| 587 |
|
| 588 |
if (non_mod == 1 && bits == 1) |
| 589 |
pixels_read += run_length; |
| 590 |
else {
|
| 591 |
if (map_table != NULL) |
| 592 |
bits = map_table[bits]; |
| 593 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 594 |
*destbuf++ = bits; |
| 595 |
pixels_read++; |
| 596 |
} |
| 597 |
} |
| 598 |
} else {
|
| 599 |
bits = get_bits(&gb, 2);
|
| 600 |
if (bits == 2) { |
| 601 |
run_length = get_bits(&gb, 4) + 9; |
| 602 |
bits = get_bits(&gb, 4);
|
| 603 |
|
| 604 |
if (non_mod == 1 && bits == 1) |
| 605 |
pixels_read += run_length; |
| 606 |
else {
|
| 607 |
if (map_table != NULL) |
| 608 |
bits = map_table[bits]; |
| 609 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 610 |
*destbuf++ = bits; |
| 611 |
pixels_read++; |
| 612 |
} |
| 613 |
} |
| 614 |
} else if (bits == 3) { |
| 615 |
run_length = get_bits(&gb, 8) + 25; |
| 616 |
bits = get_bits(&gb, 4);
|
| 617 |
|
| 618 |
if (non_mod == 1 && bits == 1) |
| 619 |
pixels_read += run_length; |
| 620 |
else {
|
| 621 |
if (map_table != NULL) |
| 622 |
bits = map_table[bits]; |
| 623 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 624 |
*destbuf++ = bits; |
| 625 |
pixels_read++; |
| 626 |
} |
| 627 |
} |
| 628 |
} else if (bits == 1) { |
| 629 |
pixels_read += 2;
|
| 630 |
if (map_table != NULL) |
| 631 |
bits = map_table[0];
|
| 632 |
else
|
| 633 |
bits = 0;
|
| 634 |
if (pixels_read <= dbuf_len) {
|
| 635 |
*destbuf++ = bits; |
| 636 |
*destbuf++ = bits; |
| 637 |
} |
| 638 |
} else {
|
| 639 |
if (map_table != NULL) |
| 640 |
bits = map_table[0];
|
| 641 |
else
|
| 642 |
bits = 0;
|
| 643 |
*destbuf++ = bits; |
| 644 |
pixels_read ++; |
| 645 |
} |
| 646 |
} |
| 647 |
} |
| 648 |
} |
| 649 |
} |
| 650 |
|
| 651 |
if (get_bits(&gb, 8) != 0) |
| 652 |
av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
| 653 |
|
| 654 |
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3; |
| 655 |
|
| 656 |
return pixels_read;
|
| 657 |
} |
| 658 |
|
| 659 |
static int dvbsub_read_8bit_string(uint8_t *destbuf, int dbuf_len, |
| 660 |
uint8_t **srcbuf, int buf_size,
|
| 661 |
int non_mod, uint8_t *map_table)
|
| 662 |
{
|
| 663 |
uint8_t *sbuf_end = (*srcbuf) + buf_size; |
| 664 |
int bits;
|
| 665 |
int run_length;
|
| 666 |
int pixels_read = 0; |
| 667 |
|
| 668 |
while (*srcbuf < sbuf_end && pixels_read < dbuf_len) {
|
| 669 |
bits = *(*srcbuf)++; |
| 670 |
|
| 671 |
if (bits != 0) { |
| 672 |
if (non_mod != 1 || bits != 1) { |
| 673 |
if (map_table != NULL) |
| 674 |
*destbuf++ = map_table[bits]; |
| 675 |
else
|
| 676 |
*destbuf++ = bits; |
| 677 |
} |
| 678 |
pixels_read++; |
| 679 |
} else {
|
| 680 |
bits = *(*srcbuf)++; |
| 681 |
run_length = bits & 0x7f;
|
| 682 |
if ((bits & 0x80) == 0) { |
| 683 |
if (run_length == 0) { |
| 684 |
return pixels_read;
|
| 685 |
} |
| 686 |
|
| 687 |
if (map_table != NULL) |
| 688 |
bits = map_table[0];
|
| 689 |
else
|
| 690 |
bits = 0;
|
| 691 |
while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 692 |
*destbuf++ = bits; |
| 693 |
pixels_read++; |
| 694 |
} |
| 695 |
} else {
|
| 696 |
bits = *(*srcbuf)++; |
| 697 |
|
| 698 |
if (non_mod == 1 && bits == 1) |
| 699 |
pixels_read += run_length; |
| 700 |
if (map_table != NULL) |
| 701 |
bits = map_table[bits]; |
| 702 |
else while (run_length-- > 0 && pixels_read < dbuf_len) { |
| 703 |
*destbuf++ = bits; |
| 704 |
pixels_read++; |
| 705 |
} |
| 706 |
} |
| 707 |
} |
| 708 |
} |
| 709 |
|
| 710 |
if (*(*srcbuf)++ != 0) |
| 711 |
av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
| 712 |
|
| 713 |
return pixels_read;
|
| 714 |
} |
| 715 |
|
| 716 |
|
| 717 |
|
| 718 |
static void dvbsub_parse_pixel_data_block(AVCodecContext *avctx, DVBSubObjectDisplay *display, |
| 719 |
uint8_t *buf, int buf_size, int top_bottom, int non_mod) |
| 720 |
{
|
| 721 |
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
| 722 |
|
| 723 |
DVBSubRegion *region = get_region(ctx, display->region_id); |
| 724 |
uint8_t *buf_end = buf + buf_size; |
| 725 |
uint8_t *pbuf; |
| 726 |
int x_pos, y_pos;
|
| 727 |
int i;
|
| 728 |
|
| 729 |
uint8_t map2to4[] = { 0x0, 0x7, 0x8, 0xf};
|
| 730 |
uint8_t map2to8[] = {0x00, 0x77, 0x88, 0xff};
|
| 731 |
uint8_t map4to8[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
|
| 732 |
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}; |
| 733 |
uint8_t *map_table; |
| 734 |
|
| 735 |
#ifdef DEBUG
|
| 736 |
av_log(avctx, AV_LOG_INFO, "DVB pixel block size %d, %s field:\n", buf_size,
|
| 737 |
top_bottom ? "bottom" : "top"); |
| 738 |
#endif
|
| 739 |
|
| 740 |
#ifdef DEBUG_PACKET_CONTENTS
|
| 741 |
for (i = 0; i < buf_size; i++) |
| 742 |
{
|
| 743 |
if (i % 16 == 0) |
| 744 |
av_log(avctx, AV_LOG_INFO, "0x%08p: ", buf+i);
|
| 745 |
|
| 746 |
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
|
| 747 |
if (i % 16 == 15) |
| 748 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 749 |
} |
| 750 |
|
| 751 |
if (i % 16 != 0) |
| 752 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 753 |
|
| 754 |
#endif
|
| 755 |
|
| 756 |
if (region == 0) |
| 757 |
return;
|
| 758 |
|
| 759 |
pbuf = region->pbuf; |
| 760 |
|
| 761 |
x_pos = display->x_pos; |
| 762 |
y_pos = display->y_pos; |
| 763 |
|
| 764 |
if ((y_pos & 1) != top_bottom) |
| 765 |
y_pos++; |
| 766 |
|
| 767 |
while (buf < buf_end) {
|
| 768 |
if (x_pos > region->width || y_pos > region->height) {
|
| 769 |
av_log(avctx, AV_LOG_ERROR, "Invalid object location!\n");
|
| 770 |
return;
|
| 771 |
} |
| 772 |
|
| 773 |
switch (*buf++) {
|
| 774 |
case 0x10: |
| 775 |
if (region->depth == 8) |
| 776 |
map_table = map2to8; |
| 777 |
else if (region->depth == 4) |
| 778 |
map_table = map2to4; |
| 779 |
else
|
| 780 |
map_table = NULL;
|
| 781 |
|
| 782 |
x_pos += dvbsub_read_2bit_string(pbuf + (y_pos * region->width) + x_pos, |
| 783 |
region->width - x_pos, &buf, buf_size, |
| 784 |
non_mod, map_table); |
| 785 |
break;
|
| 786 |
case 0x11: |
| 787 |
if (region->depth < 4) { |
| 788 |
av_log(avctx, AV_LOG_ERROR, "4-bit pixel string in %d-bit region!\n", region->depth);
|
| 789 |
return;
|
| 790 |
} |
| 791 |
|
| 792 |
if (region->depth == 8) |
| 793 |
map_table = map4to8; |
| 794 |
else
|
| 795 |
map_table = NULL;
|
| 796 |
|
| 797 |
x_pos += dvbsub_read_4bit_string(pbuf + (y_pos * region->width) + x_pos, |
| 798 |
region->width - x_pos, &buf, buf_size, |
| 799 |
non_mod, map_table); |
| 800 |
break;
|
| 801 |
case 0x12: |
| 802 |
if (region->depth < 8) { |
| 803 |
av_log(avctx, AV_LOG_ERROR, "8-bit pixel string in %d-bit region!\n", region->depth);
|
| 804 |
return;
|
| 805 |
} |
| 806 |
|
| 807 |
x_pos += dvbsub_read_8bit_string(pbuf + (y_pos * region->width) + x_pos, |
| 808 |
region->width - x_pos, &buf, buf_size, |
| 809 |
non_mod, NULL);
|
| 810 |
break;
|
| 811 |
|
| 812 |
case 0x20: |
| 813 |
map2to4[0] = (*buf) >> 4; |
| 814 |
map2to4[1] = (*buf++) & 0xf; |
| 815 |
map2to4[2] = (*buf) >> 4; |
| 816 |
map2to4[3] = (*buf++) & 0xf; |
| 817 |
break;
|
| 818 |
case 0x21: |
| 819 |
for (i = 0; i < 4; i++) |
| 820 |
map2to8[i] = *buf++; |
| 821 |
break;
|
| 822 |
case 0x22: |
| 823 |
for (i = 0; i < 16; i++) |
| 824 |
map4to8[i] = *buf++; |
| 825 |
break;
|
| 826 |
|
| 827 |
case 0xf0: |
| 828 |
x_pos = display->x_pos; |
| 829 |
y_pos += 2;
|
| 830 |
break;
|
| 831 |
default:
|
| 832 |
av_log(avctx, AV_LOG_INFO, "Unknown/unsupported pixel block 0x%x\n", *(buf-1)); |
| 833 |
} |
| 834 |
} |
| 835 |
|
| 836 |
} |
| 837 |
|
| 838 |
static void dvbsub_parse_object_segment(AVCodecContext *avctx, |
| 839 |
uint8_t *buf, int buf_size)
|
| 840 |
{
|
| 841 |
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
| 842 |
|
| 843 |
uint8_t *buf_end = buf + buf_size; |
| 844 |
uint8_t *block; |
| 845 |
int object_id;
|
| 846 |
DVBSubObject *object; |
| 847 |
DVBSubObjectDisplay *display; |
| 848 |
int top_field_len, bottom_field_len;
|
| 849 |
|
| 850 |
int coding_method, non_modifying_colour;
|
| 851 |
|
| 852 |
object_id = BE_16(buf); |
| 853 |
buf += 2;
|
| 854 |
|
| 855 |
object = get_object(ctx, object_id); |
| 856 |
|
| 857 |
if (!object)
|
| 858 |
return;
|
| 859 |
|
| 860 |
coding_method = ((*buf) >> 2) & 3; |
| 861 |
non_modifying_colour = ((*buf++) >> 1) & 1; |
| 862 |
|
| 863 |
if (coding_method == 0) { |
| 864 |
top_field_len = BE_16(buf); |
| 865 |
buf += 2;
|
| 866 |
bottom_field_len = BE_16(buf); |
| 867 |
buf += 2;
|
| 868 |
|
| 869 |
if (buf + top_field_len + bottom_field_len > buf_end) {
|
| 870 |
av_log(avctx, AV_LOG_ERROR, "Field data size too large\n");
|
| 871 |
return;
|
| 872 |
} |
| 873 |
|
| 874 |
for (display = object->display_list; display != 0; display = display->object_list_next) { |
| 875 |
block = buf; |
| 876 |
|
| 877 |
dvbsub_parse_pixel_data_block(avctx, display, block, top_field_len, 0,
|
| 878 |
non_modifying_colour); |
| 879 |
|
| 880 |
if (bottom_field_len > 0) |
| 881 |
block = buf + top_field_len; |
| 882 |
else
|
| 883 |
bottom_field_len = top_field_len; |
| 884 |
|
| 885 |
dvbsub_parse_pixel_data_block(avctx, display, block, bottom_field_len, 1,
|
| 886 |
non_modifying_colour); |
| 887 |
} |
| 888 |
|
| 889 |
/* } else if (coding_method == 1) {*/
|
| 890 |
|
| 891 |
} else {
|
| 892 |
av_log(avctx, AV_LOG_ERROR, "Unknown object coding %d\n", coding_method);
|
| 893 |
} |
| 894 |
|
| 895 |
} |
| 896 |
|
| 897 |
#define SCALEBITS 10 |
| 898 |
#define ONE_HALF (1 << (SCALEBITS - 1)) |
| 899 |
#define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5)) |
| 900 |
|
| 901 |
#define YUV_TO_RGB1_CCIR(cb1, cr1)\
|
| 902 |
{\
|
| 903 |
cb = (cb1) - 128;\
|
| 904 |
cr = (cr1) - 128;\
|
| 905 |
r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\ |
| 906 |
g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \ |
| 907 |
ONE_HALF;\ |
| 908 |
b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\ |
| 909 |
} |
| 910 |
|
| 911 |
#define YUV_TO_RGB2_CCIR(r, g, b, y1)\
|
| 912 |
{\
|
| 913 |
y = ((y1) - 16) * FIX(255.0/219.0);\ |
| 914 |
r = cm[(y + r_add) >> SCALEBITS];\ |
| 915 |
g = cm[(y + g_add) >> SCALEBITS];\ |
| 916 |
b = cm[(y + b_add) >> SCALEBITS];\ |
| 917 |
} |
| 918 |
|
| 919 |
|
| 920 |
static void dvbsub_parse_clut_segment(AVCodecContext *avctx, |
| 921 |
uint8_t *buf, int buf_size)
|
| 922 |
{
|
| 923 |
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
| 924 |
|
| 925 |
uint8_t *buf_end = buf + buf_size; |
| 926 |
int clut_id;
|
| 927 |
DVBSubCLUT *clut; |
| 928 |
int entry_id, depth , full_range;
|
| 929 |
int y, cr, cb, alpha;
|
| 930 |
int r, g, b, r_add, g_add, b_add;
|
| 931 |
|
| 932 |
#ifdef DEBUG_PACKET_CONTENTS
|
| 933 |
int i;
|
| 934 |
|
| 935 |
av_log(avctx, AV_LOG_INFO, "DVB clut packet:\n");
|
| 936 |
|
| 937 |
for (i=0; i < buf_size; i++) |
| 938 |
{
|
| 939 |
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
|
| 940 |
if (i % 16 == 15) |
| 941 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 942 |
} |
| 943 |
|
| 944 |
if (i % 16 != 0) |
| 945 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 946 |
|
| 947 |
#endif
|
| 948 |
|
| 949 |
clut_id = *buf++; |
| 950 |
buf += 1;
|
| 951 |
|
| 952 |
clut = get_clut(ctx, clut_id); |
| 953 |
|
| 954 |
if (clut == NULL) { |
| 955 |
clut = av_malloc(sizeof(DVBSubCLUT));
|
| 956 |
|
| 957 |
memcpy(clut, &default_clut, sizeof(DVBSubCLUT));
|
| 958 |
|
| 959 |
clut->id = clut_id; |
| 960 |
|
| 961 |
clut->next = ctx->clut_list; |
| 962 |
ctx->clut_list = clut; |
| 963 |
} |
| 964 |
|
| 965 |
while (buf + 4 < buf_end) |
| 966 |
{
|
| 967 |
entry_id = *buf++; |
| 968 |
|
| 969 |
depth = (*buf) & 0xe0;
|
| 970 |
|
| 971 |
if (depth == 0) { |
| 972 |
av_log(avctx, AV_LOG_ERROR, "Invalid clut depth 0x%x!\n", *buf);
|
| 973 |
return;
|
| 974 |
} |
| 975 |
|
| 976 |
full_range = (*buf++) & 1;
|
| 977 |
|
| 978 |
if (full_range) {
|
| 979 |
y = *buf++; |
| 980 |
cr = *buf++; |
| 981 |
cb = *buf++; |
| 982 |
alpha = *buf++; |
| 983 |
} else {
|
| 984 |
y = buf[0] & 0xfc; |
| 985 |
cr = (((buf[0] & 3) << 2) | ((buf[1] >> 6) & 3)) << 4; |
| 986 |
cb = (buf[1] << 2) & 0xf0; |
| 987 |
alpha = (buf[1] << 6) & 0xc0; |
| 988 |
|
| 989 |
buf += 2;
|
| 990 |
} |
| 991 |
|
| 992 |
if (y == 0) |
| 993 |
alpha = 0xff;
|
| 994 |
|
| 995 |
YUV_TO_RGB1_CCIR(cb, cr); |
| 996 |
YUV_TO_RGB2_CCIR(r, g, b, y); |
| 997 |
|
| 998 |
#ifdef DEBUG
|
| 999 |
av_log(avctx, AV_LOG_INFO, "clut %d := (%d,%d,%d,%d)\n", entry_id, r, g, b, alpha);
|
| 1000 |
#endif
|
| 1001 |
|
| 1002 |
if (depth & 0x80) |
| 1003 |
clut->clut4[entry_id] = RGBA(r,g,b,255 - alpha);
|
| 1004 |
if (depth & 0x40) |
| 1005 |
clut->clut16[entry_id] = RGBA(r,g,b,255 - alpha);
|
| 1006 |
if (depth & 0x20) |
| 1007 |
clut->clut256[entry_id] = RGBA(r,g,b,255 - alpha);
|
| 1008 |
} |
| 1009 |
} |
| 1010 |
|
| 1011 |
|
| 1012 |
static void dvbsub_parse_region_segment(AVCodecContext *avctx, |
| 1013 |
uint8_t *buf, int buf_size)
|
| 1014 |
{
|
| 1015 |
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
| 1016 |
|
| 1017 |
uint8_t *buf_end = buf + buf_size; |
| 1018 |
int region_id, object_id;
|
| 1019 |
DVBSubRegion *region; |
| 1020 |
DVBSubObject *object; |
| 1021 |
DVBSubObjectDisplay *display; |
| 1022 |
int fill;
|
| 1023 |
|
| 1024 |
if (buf_size < 10) |
| 1025 |
return;
|
| 1026 |
|
| 1027 |
region_id = *buf++; |
| 1028 |
|
| 1029 |
region = get_region(ctx, region_id); |
| 1030 |
|
| 1031 |
if (region == NULL) |
| 1032 |
{
|
| 1033 |
region = av_mallocz(sizeof(DVBSubRegion));
|
| 1034 |
|
| 1035 |
region->id = region_id; |
| 1036 |
|
| 1037 |
region->next = ctx->region_list; |
| 1038 |
ctx->region_list = region; |
| 1039 |
} |
| 1040 |
|
| 1041 |
fill = ((*buf++) >> 3) & 1; |
| 1042 |
|
| 1043 |
region->width = BE_16(buf); |
| 1044 |
buf += 2;
|
| 1045 |
region->height = BE_16(buf); |
| 1046 |
buf += 2;
|
| 1047 |
|
| 1048 |
if (region->width * region->height != region->buf_size) {
|
| 1049 |
if (region->pbuf != 0) |
| 1050 |
av_free(region->pbuf); |
| 1051 |
|
| 1052 |
region->buf_size = region->width * region->height; |
| 1053 |
|
| 1054 |
region->pbuf = av_malloc(region->buf_size); |
| 1055 |
|
| 1056 |
fill = 1;
|
| 1057 |
} |
| 1058 |
|
| 1059 |
region->depth = 1 << (((*buf++) >> 2) & 7); |
| 1060 |
region->clut = *buf++; |
| 1061 |
|
| 1062 |
if (region->depth == 8) |
| 1063 |
region->bgcolour = *buf++; |
| 1064 |
else {
|
| 1065 |
buf += 1;
|
| 1066 |
|
| 1067 |
if (region->depth == 4) |
| 1068 |
region->bgcolour = (((*buf++) >> 4) & 15); |
| 1069 |
else
|
| 1070 |
region->bgcolour = (((*buf++) >> 2) & 3); |
| 1071 |
} |
| 1072 |
|
| 1073 |
#ifdef DEBUG
|
| 1074 |
av_log(avctx, AV_LOG_INFO, "Region %d, (%dx%d)\n", region_id, region->width, region->height);
|
| 1075 |
#endif
|
| 1076 |
|
| 1077 |
if (fill) {
|
| 1078 |
memset(region->pbuf, region->bgcolour, region->buf_size); |
| 1079 |
#ifdef DEBUG
|
| 1080 |
av_log(avctx, AV_LOG_INFO, "Fill region (%d)\n", region->bgcolour);
|
| 1081 |
#endif
|
| 1082 |
} |
| 1083 |
|
| 1084 |
delete_region_display_list(ctx, region); |
| 1085 |
|
| 1086 |
while (buf + 5 < buf_end) { |
| 1087 |
object_id = BE_16(buf); |
| 1088 |
buf += 2;
|
| 1089 |
|
| 1090 |
object = get_object(ctx, object_id); |
| 1091 |
|
| 1092 |
if (object == NULL) { |
| 1093 |
object = av_mallocz(sizeof(DVBSubObject));
|
| 1094 |
|
| 1095 |
object->id = object_id; |
| 1096 |
object->next = ctx->object_list; |
| 1097 |
ctx->object_list = object; |
| 1098 |
} |
| 1099 |
|
| 1100 |
object->type = (*buf) >> 6;
|
| 1101 |
|
| 1102 |
display = av_mallocz(sizeof(DVBSubObjectDisplay));
|
| 1103 |
|
| 1104 |
display->object_id = object_id; |
| 1105 |
display->region_id = region_id; |
| 1106 |
|
| 1107 |
display->x_pos = BE_16(buf) & 0xfff;
|
| 1108 |
buf += 2;
|
| 1109 |
display->y_pos = BE_16(buf) & 0xfff;
|
| 1110 |
buf += 2;
|
| 1111 |
|
| 1112 |
if ((object->type == 1 || object->type == 2) && buf+1 < buf_end) { |
| 1113 |
display->fgcolour = *buf++; |
| 1114 |
display->bgcolour = *buf++; |
| 1115 |
} |
| 1116 |
|
| 1117 |
display->region_list_next = region->display_list; |
| 1118 |
region->display_list = display; |
| 1119 |
|
| 1120 |
display->object_list_next = object->display_list; |
| 1121 |
object->display_list = display; |
| 1122 |
} |
| 1123 |
} |
| 1124 |
|
| 1125 |
static void dvbsub_parse_page_segment(AVCodecContext *avctx, |
| 1126 |
uint8_t *buf, int buf_size)
|
| 1127 |
{
|
| 1128 |
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
| 1129 |
DVBSubRegionDisplay *display; |
| 1130 |
DVBSubRegionDisplay *tmp_display_list, **tmp_ptr; |
| 1131 |
|
| 1132 |
uint8_t *buf_end = buf + buf_size; |
| 1133 |
int region_id;
|
| 1134 |
int page_state;
|
| 1135 |
|
| 1136 |
if (buf_size < 1) |
| 1137 |
return;
|
| 1138 |
|
| 1139 |
ctx->time_out = *buf++; |
| 1140 |
page_state = ((*buf++) >> 2) & 3; |
| 1141 |
|
| 1142 |
#ifdef DEBUG
|
| 1143 |
av_log(avctx, AV_LOG_INFO, "Page time out %ds, state %d\n", ctx->time_out, page_state);
|
| 1144 |
#endif
|
| 1145 |
|
| 1146 |
if (page_state == 2) |
| 1147 |
{
|
| 1148 |
delete_state(ctx); |
| 1149 |
} |
| 1150 |
|
| 1151 |
tmp_display_list = ctx->display_list; |
| 1152 |
ctx->display_list = NULL;
|
| 1153 |
ctx->display_list_size = 0;
|
| 1154 |
|
| 1155 |
while (buf + 5 < buf_end) { |
| 1156 |
region_id = *buf++; |
| 1157 |
buf += 1;
|
| 1158 |
|
| 1159 |
display = tmp_display_list; |
| 1160 |
tmp_ptr = &tmp_display_list; |
| 1161 |
|
| 1162 |
while (display != NULL && display->region_id != region_id) { |
| 1163 |
tmp_ptr = &display->next; |
| 1164 |
display = display->next; |
| 1165 |
} |
| 1166 |
|
| 1167 |
if (display == NULL) |
| 1168 |
display = av_mallocz(sizeof(DVBSubRegionDisplay));
|
| 1169 |
|
| 1170 |
display->region_id = region_id; |
| 1171 |
|
| 1172 |
display->x_pos = BE_16(buf); |
| 1173 |
buf += 2;
|
| 1174 |
display->y_pos = BE_16(buf); |
| 1175 |
buf += 2;
|
| 1176 |
|
| 1177 |
*tmp_ptr = display->next; |
| 1178 |
|
| 1179 |
display->next = ctx->display_list; |
| 1180 |
ctx->display_list = display; |
| 1181 |
ctx->display_list_size++; |
| 1182 |
|
| 1183 |
#ifdef DEBUG
|
| 1184 |
av_log(avctx, AV_LOG_INFO, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos);
|
| 1185 |
#endif
|
| 1186 |
} |
| 1187 |
|
| 1188 |
while (tmp_display_list != 0) { |
| 1189 |
display = tmp_display_list; |
| 1190 |
|
| 1191 |
tmp_display_list = display->next; |
| 1192 |
|
| 1193 |
av_free(display); |
| 1194 |
} |
| 1195 |
|
| 1196 |
} |
| 1197 |
|
| 1198 |
|
| 1199 |
#ifdef DEBUG_SAVE_IMAGES
|
| 1200 |
static void save_display_set(DVBSubContext *ctx) |
| 1201 |
{
|
| 1202 |
DVBSubRegion *region; |
| 1203 |
DVBSubRegionDisplay *display; |
| 1204 |
DVBSubCLUT *clut; |
| 1205 |
uint32_t *clut_table; |
| 1206 |
int x_pos, y_pos, width, height;
|
| 1207 |
int x, y, y_off, x_off;
|
| 1208 |
uint32_t *pbuf; |
| 1209 |
char filename[32]; |
| 1210 |
static int fileno_index = 0; |
| 1211 |
|
| 1212 |
x_pos = -1;
|
| 1213 |
y_pos = -1;
|
| 1214 |
width = 0;
|
| 1215 |
height = 0;
|
| 1216 |
|
| 1217 |
for (display = ctx->display_list; display != NULL; display = display->next) { |
| 1218 |
region = get_region(ctx, display->region_id); |
| 1219 |
|
| 1220 |
if (x_pos == -1) { |
| 1221 |
x_pos = display->x_pos; |
| 1222 |
y_pos = display->y_pos; |
| 1223 |
width = region->width; |
| 1224 |
height = region->height; |
| 1225 |
} else {
|
| 1226 |
if (display->x_pos < x_pos) {
|
| 1227 |
width += (x_pos - display->x_pos); |
| 1228 |
x_pos = display->x_pos; |
| 1229 |
} |
| 1230 |
|
| 1231 |
if (display->y_pos < y_pos) {
|
| 1232 |
height += (y_pos - display->y_pos); |
| 1233 |
y_pos = display->y_pos; |
| 1234 |
} |
| 1235 |
|
| 1236 |
if (display->x_pos + region->width > x_pos + width) {
|
| 1237 |
width = display->x_pos + region->width - x_pos; |
| 1238 |
} |
| 1239 |
|
| 1240 |
if (display->y_pos + region->height > y_pos + height) {
|
| 1241 |
height = display->y_pos + region->height - y_pos; |
| 1242 |
} |
| 1243 |
} |
| 1244 |
} |
| 1245 |
|
| 1246 |
if (x_pos >= 0) { |
| 1247 |
|
| 1248 |
pbuf = av_malloc(width * height * 4);
|
| 1249 |
|
| 1250 |
for (display = ctx->display_list; display != NULL; display = display->next) { |
| 1251 |
region = get_region(ctx, display->region_id); |
| 1252 |
|
| 1253 |
x_off = display->x_pos - x_pos; |
| 1254 |
y_off = display->y_pos - y_pos; |
| 1255 |
|
| 1256 |
clut = get_clut(ctx, region->clut); |
| 1257 |
|
| 1258 |
if (clut == 0) |
| 1259 |
clut = &default_clut; |
| 1260 |
|
| 1261 |
switch (region->depth) {
|
| 1262 |
case 2: |
| 1263 |
clut_table = clut->clut4; |
| 1264 |
break;
|
| 1265 |
case 8: |
| 1266 |
clut_table = clut->clut256; |
| 1267 |
break;
|
| 1268 |
case 4: |
| 1269 |
default:
|
| 1270 |
clut_table = clut->clut16; |
| 1271 |
break;
|
| 1272 |
} |
| 1273 |
|
| 1274 |
for (y = 0; y < region->height; y++) { |
| 1275 |
for (x = 0; x < region->width; x++) { |
| 1276 |
pbuf[((y + y_off) * width) + x_off + x] = |
| 1277 |
clut_table[region->pbuf[y * region->width + x]]; |
| 1278 |
} |
| 1279 |
} |
| 1280 |
|
| 1281 |
} |
| 1282 |
|
| 1283 |
snprintf(filename, 32, "dvbs.%d", fileno_index); |
| 1284 |
|
| 1285 |
png_save2(filename, pbuf, width, height); |
| 1286 |
|
| 1287 |
av_free(pbuf); |
| 1288 |
} |
| 1289 |
|
| 1290 |
fileno_index++; |
| 1291 |
} |
| 1292 |
#endif
|
| 1293 |
|
| 1294 |
static int dvbsub_display_end_segment(AVCodecContext *avctx, uint8_t *buf, |
| 1295 |
int buf_size, AVSubtitle *sub)
|
| 1296 |
{
|
| 1297 |
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
| 1298 |
|
| 1299 |
DVBSubRegion *region; |
| 1300 |
DVBSubRegionDisplay *display; |
| 1301 |
AVSubtitleRect *rect; |
| 1302 |
DVBSubCLUT *clut; |
| 1303 |
uint32_t *clut_table; |
| 1304 |
int i;
|
| 1305 |
|
| 1306 |
sub->rects = NULL;
|
| 1307 |
sub->start_display_time = 0;
|
| 1308 |
sub->end_display_time = ctx->time_out * 1000;
|
| 1309 |
sub->format = 0;
|
| 1310 |
|
| 1311 |
sub->num_rects = ctx->display_list_size; |
| 1312 |
|
| 1313 |
if (sub->num_rects > 0) |
| 1314 |
sub->rects = av_mallocz(sizeof(AVSubtitleRect) * sub->num_rects);
|
| 1315 |
|
| 1316 |
i = 0;
|
| 1317 |
|
| 1318 |
for (display = ctx->display_list; display != NULL; display = display->next) { |
| 1319 |
region = get_region(ctx, display->region_id); |
| 1320 |
rect = &sub->rects[i]; |
| 1321 |
|
| 1322 |
if (region == NULL) |
| 1323 |
continue;
|
| 1324 |
|
| 1325 |
rect->x = display->x_pos; |
| 1326 |
rect->y = display->y_pos; |
| 1327 |
rect->w = region->width; |
| 1328 |
rect->h = region->height; |
| 1329 |
rect->nb_colors = 16;
|
| 1330 |
rect->linesize = region->width; |
| 1331 |
|
| 1332 |
clut = get_clut(ctx, region->clut); |
| 1333 |
|
| 1334 |
if (clut == NULL) |
| 1335 |
clut = &default_clut; |
| 1336 |
|
| 1337 |
switch (region->depth) {
|
| 1338 |
case 2: |
| 1339 |
clut_table = clut->clut4; |
| 1340 |
break;
|
| 1341 |
case 8: |
| 1342 |
clut_table = clut->clut256; |
| 1343 |
break;
|
| 1344 |
case 4: |
| 1345 |
default:
|
| 1346 |
clut_table = clut->clut16; |
| 1347 |
break;
|
| 1348 |
} |
| 1349 |
|
| 1350 |
rect->rgba_palette = av_malloc((1 << region->depth) * sizeof(uint32_t)); |
| 1351 |
memcpy(rect->rgba_palette, clut_table, (1 << region->depth) * sizeof(uint32_t)); |
| 1352 |
|
| 1353 |
rect->bitmap = av_malloc(region->buf_size); |
| 1354 |
memcpy(rect->bitmap, region->pbuf, region->buf_size); |
| 1355 |
|
| 1356 |
i++; |
| 1357 |
} |
| 1358 |
|
| 1359 |
sub->num_rects = i; |
| 1360 |
|
| 1361 |
#ifdef DEBUG_SAVE_IMAGES
|
| 1362 |
save_display_set(ctx); |
| 1363 |
#endif
|
| 1364 |
|
| 1365 |
return 1; |
| 1366 |
} |
| 1367 |
|
| 1368 |
static int dvbsub_decode(AVCodecContext *avctx, |
| 1369 |
void *data, int *data_size, |
| 1370 |
uint8_t *buf, int buf_size)
|
| 1371 |
{
|
| 1372 |
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
| 1373 |
AVSubtitle *sub = (AVSubtitle*) data; |
| 1374 |
uint8_t *p, *p_end; |
| 1375 |
int segment_type;
|
| 1376 |
int page_id;
|
| 1377 |
int segment_length;
|
| 1378 |
|
| 1379 |
#ifdef DEBUG_PACKET_CONTENTS
|
| 1380 |
int i;
|
| 1381 |
|
| 1382 |
av_log(avctx, AV_LOG_INFO, "DVB sub packet:\n");
|
| 1383 |
|
| 1384 |
for (i=0; i < buf_size; i++) |
| 1385 |
{
|
| 1386 |
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
|
| 1387 |
if (i % 16 == 15) |
| 1388 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 1389 |
} |
| 1390 |
|
| 1391 |
if (i % 16 != 0) |
| 1392 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 1393 |
|
| 1394 |
#endif
|
| 1395 |
|
| 1396 |
if (buf_size <= 2) |
| 1397 |
return -1; |
| 1398 |
|
| 1399 |
p = buf; |
| 1400 |
p_end = buf + buf_size; |
| 1401 |
|
| 1402 |
while (p < p_end && *p == 0x0f) |
| 1403 |
{
|
| 1404 |
p += 1;
|
| 1405 |
segment_type = *p++; |
| 1406 |
page_id = BE_16(p); |
| 1407 |
p += 2;
|
| 1408 |
segment_length = BE_16(p); |
| 1409 |
p += 2;
|
| 1410 |
|
| 1411 |
if (page_id == ctx->composition_id || page_id == ctx->ancillary_id) {
|
| 1412 |
switch (segment_type) {
|
| 1413 |
case DVBSUB_PAGE_SEGMENT:
|
| 1414 |
dvbsub_parse_page_segment(avctx, p, segment_length); |
| 1415 |
break;
|
| 1416 |
case DVBSUB_REGION_SEGMENT:
|
| 1417 |
dvbsub_parse_region_segment(avctx, p, segment_length); |
| 1418 |
break;
|
| 1419 |
case DVBSUB_CLUT_SEGMENT:
|
| 1420 |
dvbsub_parse_clut_segment(avctx, p, segment_length); |
| 1421 |
break;
|
| 1422 |
case DVBSUB_OBJECT_SEGMENT:
|
| 1423 |
dvbsub_parse_object_segment(avctx, p, segment_length); |
| 1424 |
break;
|
| 1425 |
case DVBSUB_DISPLAY_SEGMENT:
|
| 1426 |
*data_size = dvbsub_display_end_segment(avctx, p, segment_length, sub); |
| 1427 |
break;
|
| 1428 |
default:
|
| 1429 |
#ifdef DEBUG
|
| 1430 |
av_log(avctx, AV_LOG_INFO, "Subtitling segment type 0x%x, page id %d, length %d\n",
|
| 1431 |
segment_type, page_id, segment_length); |
| 1432 |
#endif
|
| 1433 |
break;
|
| 1434 |
} |
| 1435 |
} |
| 1436 |
|
| 1437 |
p += segment_length; |
| 1438 |
} |
| 1439 |
|
| 1440 |
if (p != p_end)
|
| 1441 |
{
|
| 1442 |
#ifdef DEBUG
|
| 1443 |
av_log(avctx, AV_LOG_INFO, "Junk at end of packet\n");
|
| 1444 |
#endif
|
| 1445 |
return -1; |
| 1446 |
} |
| 1447 |
|
| 1448 |
return buf_size;
|
| 1449 |
} |
| 1450 |
|
| 1451 |
|
| 1452 |
AVCodec dvbsub_decoder = {
|
| 1453 |
"dvbsub",
|
| 1454 |
CODEC_TYPE_SUBTITLE, |
| 1455 |
CODEC_ID_DVB_SUBTITLE, |
| 1456 |
sizeof(DVBSubContext),
|
| 1457 |
dvbsub_init_decoder, |
| 1458 |
NULL,
|
| 1459 |
dvbsub_close_decoder, |
| 1460 |
dvbsub_decode, |
| 1461 |
}; |
| 1462 |
|
| 1463 |
/* Parser (mostly) copied from dvdsub.c */
|
| 1464 |
|
| 1465 |
#define PARSE_BUF_SIZE (65536) |
| 1466 |
|
| 1467 |
|
| 1468 |
/* parser definition */
|
| 1469 |
typedef struct DVBSubParseContext { |
| 1470 |
uint8_t *packet_buf; |
| 1471 |
int packet_start;
|
| 1472 |
int packet_index;
|
| 1473 |
int in_packet;
|
| 1474 |
} DVBSubParseContext; |
| 1475 |
|
| 1476 |
static int dvbsub_parse_init(AVCodecParserContext *s) |
| 1477 |
{
|
| 1478 |
DVBSubParseContext *pc = s->priv_data; |
| 1479 |
pc->packet_buf = av_malloc(PARSE_BUF_SIZE); |
| 1480 |
|
| 1481 |
return 0; |
| 1482 |
} |
| 1483 |
|
| 1484 |
static int dvbsub_parse(AVCodecParserContext *s, |
| 1485 |
AVCodecContext *avctx, |
| 1486 |
uint8_t **poutbuf, int *poutbuf_size,
|
| 1487 |
const uint8_t *buf, int buf_size) |
| 1488 |
{
|
| 1489 |
DVBSubParseContext *pc = s->priv_data; |
| 1490 |
uint8_t *p, *p_end; |
| 1491 |
int len, buf_pos = 0; |
| 1492 |
|
| 1493 |
#ifdef DEBUG
|
| 1494 |
av_log(avctx, AV_LOG_INFO, "DVB parse packet pts=%Lx, lpts=%Lx, cpts=%Lx:\n",
|
| 1495 |
s->pts, s->last_pts, s->cur_frame_pts[s->cur_frame_start_index]); |
| 1496 |
#endif
|
| 1497 |
|
| 1498 |
#ifdef DEBUG_PACKET_CONTENTS
|
| 1499 |
int i;
|
| 1500 |
|
| 1501 |
for (i=0; i < buf_size; i++) |
| 1502 |
{
|
| 1503 |
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
|
| 1504 |
if (i % 16 == 15) |
| 1505 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 1506 |
} |
| 1507 |
|
| 1508 |
if (i % 16 != 0) |
| 1509 |
av_log(avctx, AV_LOG_INFO, "\n");
|
| 1510 |
|
| 1511 |
#endif
|
| 1512 |
|
| 1513 |
*poutbuf = NULL;
|
| 1514 |
*poutbuf_size = 0;
|
| 1515 |
|
| 1516 |
s->fetch_timestamp = 1;
|
| 1517 |
|
| 1518 |
if (s->last_pts != s->pts && s->last_pts != AV_NOPTS_VALUE) /* Start of a new packet */ |
| 1519 |
{
|
| 1520 |
if (pc->packet_index != pc->packet_start)
|
| 1521 |
{
|
| 1522 |
#ifdef DEBUG
|
| 1523 |
av_log(avctx, AV_LOG_INFO, "Discarding %d bytes\n",
|
| 1524 |
pc->packet_index - pc->packet_start); |
| 1525 |
#endif
|
| 1526 |
} |
| 1527 |
|
| 1528 |
pc->packet_start = 0;
|
| 1529 |
pc->packet_index = 0;
|
| 1530 |
|
| 1531 |
if (buf_size < 2 || buf[0] != 0x20 || buf[1] != 0x00) { |
| 1532 |
#ifdef DEBUG
|
| 1533 |
av_log(avctx, AV_LOG_INFO, "Bad packet header\n");
|
| 1534 |
#endif
|
| 1535 |
return -1; |
| 1536 |
} |
| 1537 |
|
| 1538 |
buf_pos = 2;
|
| 1539 |
|
| 1540 |
pc->in_packet = 1;
|
| 1541 |
} else {
|
| 1542 |
if (pc->packet_start != 0) |
| 1543 |
{
|
| 1544 |
if (pc->packet_index != pc->packet_start)
|
| 1545 |
{
|
| 1546 |
memmove(pc->packet_buf, pc->packet_buf + pc->packet_start, |
| 1547 |
pc->packet_index - pc->packet_start); |
| 1548 |
|
| 1549 |
pc->packet_index -= pc->packet_start; |
| 1550 |
pc->packet_start = 0;
|
| 1551 |
} else {
|
| 1552 |
pc->packet_start = 0;
|
| 1553 |
pc->packet_index = 0;
|
| 1554 |
} |
| 1555 |
} |
| 1556 |
} |
| 1557 |
|
| 1558 |
if (buf_size - buf_pos + pc->packet_index > PARSE_BUF_SIZE)
|
| 1559 |
return -1; |
| 1560 |
|
| 1561 |
/* if not currently in a packet, discard data */
|
| 1562 |
if (pc->in_packet == 0) |
| 1563 |
return buf_size;
|
| 1564 |
|
| 1565 |
memcpy(pc->packet_buf + pc->packet_index, buf + buf_pos, buf_size - buf_pos); |
| 1566 |
pc->packet_index += buf_size - buf_pos; |
| 1567 |
|
| 1568 |
p = pc->packet_buf; |
| 1569 |
p_end = pc->packet_buf + pc->packet_index; |
| 1570 |
|
| 1571 |
while (p < p_end)
|
| 1572 |
{
|
| 1573 |
if (*p == 0x0f) |
| 1574 |
{
|
| 1575 |
if (p + 6 <= p_end) |
| 1576 |
{
|
| 1577 |
len = BE_16(p + 4);
|
| 1578 |
|
| 1579 |
if (p + len + 6 <= p_end) |
| 1580 |
{
|
| 1581 |
*poutbuf_size += len + 6;
|
| 1582 |
|
| 1583 |
p += len + 6;
|
| 1584 |
} else
|
| 1585 |
break;
|
| 1586 |
} else
|
| 1587 |
break;
|
| 1588 |
} else if (*p == 0xff) { |
| 1589 |
if (p + 1 < p_end) |
| 1590 |
{
|
| 1591 |
#ifdef DEBUG
|
| 1592 |
av_log(avctx, AV_LOG_INFO, "Junk at end of packet\n");
|
| 1593 |
#endif
|
| 1594 |
} |
| 1595 |
pc->packet_index = p - pc->packet_buf; |
| 1596 |
pc->in_packet = 0;
|
| 1597 |
break;
|
| 1598 |
} else {
|
| 1599 |
av_log(avctx, AV_LOG_ERROR, "Junk in packet\n");
|
| 1600 |
|
| 1601 |
pc->packet_index = p - pc->packet_buf; |
| 1602 |
pc->in_packet = 0;
|
| 1603 |
break;
|
| 1604 |
} |
| 1605 |
} |
| 1606 |
|
| 1607 |
if (*poutbuf_size > 0) |
| 1608 |
{
|
| 1609 |
*poutbuf = pc->packet_buf; |
| 1610 |
pc->packet_start = *poutbuf_size; |
| 1611 |
} |
| 1612 |
|
| 1613 |
if (s->last_pts == AV_NOPTS_VALUE)
|
| 1614 |
s->last_pts = s->pts; |
| 1615 |
|
| 1616 |
return buf_size;
|
| 1617 |
} |
| 1618 |
|
| 1619 |
static void dvbsub_parse_close(AVCodecParserContext *s) |
| 1620 |
{
|
| 1621 |
DVBSubParseContext *pc = s->priv_data; |
| 1622 |
av_freep(&pc->packet_buf); |
| 1623 |
} |
| 1624 |
|
| 1625 |
AVCodecParser dvbsub_parser = {
|
| 1626 |
{ CODEC_ID_DVB_SUBTITLE },
|
| 1627 |
sizeof(DVBSubParseContext),
|
| 1628 |
dvbsub_parse_init, |
| 1629 |
dvbsub_parse, |
| 1630 |
dvbsub_parse_close, |
| 1631 |
}; |