static void dvbsub_parse_page_segment(AVCodecContext *avctx, const uint8_t *buf, int buf_size) { DVBSubContext *ctx = avctx->priv_data; DVBSubRegionDisplay *display; DVBSubRegionDisplay *tmp_display_list, **tmp_ptr; const uint8_t *buf_end = buf + buf_size; int region_id; int page_state; if (buf_size < 1) return; ctx->time_out = *buf++; page_state = ((*buf++) >> 2) & 3; av_dlog(avctx, "Page time out %ds, state %d\n", ctx->time_out, page_state); if (page_state == 2) { delete_state(ctx); } tmp_display_list = ctx->display_list; ctx->display_list = NULL; ctx->display_list_size = 0; while (buf + 5 < buf_end) { region_id = *buf++; buf += 1; display = tmp_display_list; tmp_ptr = &tmp_display_list; while (display && display->region_id != region_id) { tmp_ptr = &display->next; display = display->next; } if (!display) display = av_mallocz(sizeof(DVBSubRegionDisplay)); display->region_id = region_id; display->x_pos = AV_RB16(buf); buf += 2; display->y_pos = AV_RB16(buf); buf += 2; *tmp_ptr = display->next; display->next = ctx->display_list; ctx->display_list = display; ctx->display_list_size++; av_dlog(avctx, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos); } while (tmp_display_list) { display = tmp_display_list; tmp_display_list = display->next; av_free(display); } }