1 /**
2 * @file
3 * @brief Source file for CacheBase class
4 * @author Jonathan Thomas <jonathan@openshot.org>
5 *
6 * @ref License
7 */
8
9 /* LICENSE
10 *
11 * Copyright (c) 2008-2019 OpenShot Studios, LLC
12 * <http://www.openshotstudios.com/>. This file is part of
13 * OpenShot Library (libopenshot), an open-source project dedicated to
14 * delivering high quality video editing and animation solutions to the
15 * world. For more information visit <http://www.openshot.org/>.
16 *
17 * OpenShot Library (libopenshot) is free software: you can redistribute it
18 * and/or modify it under the terms of the GNU Lesser General Public License
19 * as published by the Free Software Foundation, either version 3 of the
20 * License, or (at your option) any later version.
21 *
22 * OpenShot Library (libopenshot) is distributed in the hope that it will be
23 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU Lesser General Public License for more details.
26 *
27 * You should have received a copy of the GNU Lesser General Public License
28 * along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
29 */
30
31 #include "CacheBase.h"
32
33 using namespace std;
34 using namespace openshot;
35
36 // Default constructor, no max frames
CacheBase()37 CacheBase::CacheBase() : max_bytes(0) {
38 // Init the critical section
39 cacheCriticalSection = new CriticalSection();
40 }
41
42 // Constructor that sets the max frames to cache
CacheBase(int64_t max_bytes)43 CacheBase::CacheBase(int64_t max_bytes) : max_bytes(max_bytes) {
44 // Init the critical section
45 cacheCriticalSection = new CriticalSection();
46 }
47
48 // Set maximum bytes to a different amount based on a ReaderInfo struct
SetMaxBytesFromInfo(int64_t number_of_frames,int width,int height,int sample_rate,int channels)49 void CacheBase::SetMaxBytesFromInfo(int64_t number_of_frames, int width, int height, int sample_rate, int channels)
50 {
51 // n frames X height X width X 4 colors of chars X audio channels X 4 byte floats
52 int64_t bytes = number_of_frames * (height * width * 4 + (sample_rate * channels * 4));
53 SetMaxBytes(bytes);
54 }
55
56 // Generate Json::Value for this object
JsonValue()57 Json::Value CacheBase::JsonValue() {
58
59 // Create root json object
60 Json::Value root;
61 std::stringstream max_bytes_stream;
62 max_bytes_stream << max_bytes;
63 root["max_bytes"] = max_bytes_stream.str();
64
65 // return JsonValue
66 return root;
67 }
68
69 // Load Json::Value into this object
SetJsonValue(const Json::Value root)70 void CacheBase::SetJsonValue(const Json::Value root) {
71
72 // Set data from Json (if key is found)
73 if (!root["max_bytes"].isNull())
74 max_bytes = std::stoll(root["max_bytes"].asString());
75 }
76