CacheBase.cpp
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/**
* @file
* @brief Source file for CacheBase class
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @section LICENSE
*
* Copyright (c) 2008-2014 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "../include/CacheBase.h"
using namespace std;
using namespace openshot;
// Default constructor, no max frames
CacheBase::CacheBase() : max_bytes(0) {
// Init the critical section
cacheCriticalSection = new CriticalSection();
};
// Constructor that sets the max frames to cache
CacheBase::CacheBase(int64_t max_bytes) : max_bytes(max_bytes) {
// Init the critical section
cacheCriticalSection = new CriticalSection();
};
// Set maximum bytes to a different amount based on a ReaderInfo struct
void CacheBase::SetMaxBytesFromInfo(int64_t number_of_frames, int width, int height, int sample_rate, int channels)
{
// n frames X height X width X 4 colors of chars X audio channels X 4 byte floats
int64_t bytes = number_of_frames * (height * width * 4 + (sample_rate * channels * 4));
SetMaxBytes(bytes);
}
// Generate Json::JsonValue for this object
Json::Value CacheBase::JsonValue() {
// Create root json object
Json::Value root;
stringstream max_bytes_stream;
max_bytes_stream << max_bytes;
root["max_bytes"] = max_bytes_stream.str();
// return JsonValue
return root;
}
// Load Json::JsonValue into this object
void CacheBase::SetJsonValue(Json::Value root) {
// Set data from Json (if key is found)
if (!root["max_bytes"].isNull())
max_bytes = atoll(root["max_bytes"].asString().c_str());
}
openshot::CacheBase::cacheCriticalSection
CriticalSection * cacheCriticalSection
Section lock for multiple threads.
Definition: CacheBase.h:52
std
openshot::CacheBase::SetMaxBytesFromInfo
void SetMaxBytesFromInfo(int64_t number_of_frames, int width, int height, int sample_rate, int channels)
Set maximum bytes to a different amount based on a ReaderInfo struct.
Definition: CacheBase.cpp:46
openshot::CacheBase::CacheBase
CacheBase()
Default constructor, no max bytes.
Definition: CacheBase.cpp:34
openshot::CacheBase::JsonValue
virtual Json::Value JsonValue()=0
Generate Json::JsonValue for this object.
Definition: CacheBase.cpp:54
openshot::CacheBase::SetMaxBytes
void SetMaxBytes(int64_t number_of_bytes)
Set maximum bytes to a different amount.
Definition: CacheBase.h:97
openshot
This namespace is the default namespace for all code in the openshot library.
Definition: AudioBufferSource.h:45
openshot::CacheBase::max_bytes
int64_t max_bytes
This is the max number of bytes to cache (0 = no limit)
Definition: CacheBase.h:49
openshot::CacheBase::SetJsonValue
virtual void SetJsonValue(Json::Value root)=0
Load Json::JsonValue into this object.
Definition: CacheBase.cpp:67