static void save_display_set(DVBSubContext *ctx) { DVBSubRegion *region; DVBSubRegionDisplay *display; DVBSubCLUT *clut; uint32_t *clut_table; int x_pos, y_pos, width, height; int x, y, y_off, x_off; uint32_t *pbuf; char filename[32]; static int fileno_index = 0; x_pos = -1; y_pos = -1; width = 0; height = 0; for (display = ctx->display_list; display; display = display->next) { region = get_region(ctx, display->region_id); if (x_pos == -1) { x_pos = display->x_pos; y_pos = display->y_pos; width = region->width; height = region->height; } else { if (display->x_pos < x_pos) { width += (x_pos - display->x_pos); x_pos = display->x_pos; } if (display->y_pos < y_pos) { height += (y_pos - display->y_pos); y_pos = display->y_pos; } if (display->x_pos + region->width > x_pos + width) { width = display->x_pos + region->width - x_pos; } if (display->y_pos + region->height > y_pos + height) { height = display->y_pos + region->height - y_pos; } } } if (x_pos >= 0) { pbuf = av_malloc(width * height * 4); for (display = ctx->display_list; display; display = display->next) { region = get_region(ctx, display->region_id); x_off = display->x_pos - x_pos; y_off = display->y_pos - y_pos; clut = get_clut(ctx, region->clut); if (!clut) clut = &default_clut; switch (region->depth) { case 2: clut_table = clut->clut4; break; case 8: clut_table = clut->clut256; break; case 4: default: clut_table = clut->clut16; break; } for (y = 0; y < region->height; y++) { for (x = 0; x < region->width; x++) { pbuf[((y + y_off) * width) + x_off + x] = clut_table[region->pbuf[y * region->width + x]]; } } } snprintf(filename, sizeof(filename), "dvbs.%d", fileno_index); png_save2(filename, pbuf, width, height); av_freep(&pbuf); } fileno_index++; }