display-sync.c (1868B)
1/* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20#include "config.h" 21#include "display.h" 22#include "layer.h" 23#include "log.h" 24#include "video.h" 25 26#include <guacamole/client.h> 27#include <guacamole/timestamp.h> 28 29#include <assert.h> 30#include <stdlib.h> 31 32int guacenc_display_sync(guacenc_display* display, guac_timestamp timestamp) { 33 34 /* Verify timestamp is not decreasing */ 35 if (timestamp < display->last_sync) { 36 guacenc_log(GUAC_LOG_WARNING, "Decreasing sync timestamp"); 37 return 1; 38 } 39 40 /* Update timestamp of display */ 41 display->last_sync = timestamp; 42 43 /* Flatten display to default layer */ 44 if (guacenc_display_flatten(display)) 45 return 1; 46 47 /* Retrieve default layer (guaranteed to not be NULL) */ 48 guacenc_layer* def_layer = guacenc_display_get_layer(display, 0); 49 assert(def_layer != NULL); 50 51 /* Update video timeline */ 52 if (guacenc_video_advance_timeline(display->output, timestamp)) 53 return 1; 54 55 /* Prepare frame for write upon next flush */ 56 guacenc_video_prepare_frame(display->output, def_layer->frame); 57 return 0; 58 59} 60