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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ViperBuffer.h"
ViperBuffer::ViperBuffer(QObject* parent) :
QIODevice(parent)
{
readMax = 32768;
readBuffer = (uint8_t*)malloc(sizeof(uint8_t)*readMax);
pthread_mutex_init(&(this->monitorMutex), NULL);
qByteArrayVector.reserve(2);
qByteArrayVector.push_back(new QByteArray());
qByteArrayVector.push_back(new QByteArray());
indexReadBuffer = 0;
indexWriteBuffer = 0;
}
ViperBuffer::~ViperBuffer()
{
pthread_mutex_destroy(&(this->monitorMutex));
free(readBuffer);
}
bool ViperBuffer::isSequential() const
{
return true;
}
bool ViperBuffer::open(OpenMode mode)
{
setOpenMode(mode);
return true;
}
void ViperBuffer::close()
{
qByteArrayVector.clear();
setOpenMode(NotOpen);
}
void ViperBuffer::clear()
{
qByteArrayVector.at(0)->clear();
qByteArrayVector.at(1)->clear();
indexReadBuffer = 0;
indexWriteBuffer = 0;
}
qint64 ViperBuffer::readData(char* data, qint64 maxSize)
{
pthread_mutex_lock(&(this->monitorMutex));
if ((maxSize = qMin(maxSize, qint64(qByteArrayVector.at(indexReadBuffer)->size()))) <= 0)
{
pthread_mutex_unlock(&(this->monitorMutex));
return qint64(0);
}
memcpy(data, qByteArrayVector.at(indexReadBuffer)->constData(), maxSize);
qByteArrayVector.at(indexReadBuffer)->remove(0,maxSize);
pthread_mutex_unlock(&(this->monitorMutex));
return maxSize;
}
qint64 ViperBuffer::writeData(libdash::framework::input::MediaObject* media)
{
pthread_mutex_lock(&(this->monitorMutex));
int ret = 0;
int total = 0;
ret = media->ReadInitSegment(readBuffer,readMax);
total += ret;
this->writeData((const char *)readBuffer, ret);
ret = media->Read(readBuffer,readMax);
while(ret)
{
total += ret;
this->writeData((const char *)readBuffer, ret);
ret = media->Read(readBuffer,readMax);
}
pthread_mutex_unlock(&(this->monitorMutex));
return total;
}
qint64 ViperBuffer::writeData(const char* data, qint64 maxSize)
{
qByteArrayVector.at(indexWriteBuffer)->append(data, maxSize);
return maxSize;
}
void ViperBuffer::writeToNextBuffer()
{
pthread_mutex_lock(&(this->monitorMutex));
indexWriteBuffer = (indexWriteBuffer + 1 ) % 2;
pthread_mutex_unlock(&(this->monitorMutex));
}
void ViperBuffer::readFromNextBuffer()
{
pthread_mutex_lock(&(this->monitorMutex));
indexReadBuffer = (indexReadBuffer + 1 ) % 2;
pthread_mutex_unlock(&(this->monitorMutex));
}
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