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File Source plugin: auto adaptative throttling

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This commit is contained in:
Edouard Griffiths
2016-03-14 01:43:21 +01:00
parent 1a9af41ac3
commit 1393a93070
2 changed files with 44 additions and 16 deletions
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plugins/samplesource/filesource/filesourcethread.cpp
+39 -15
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@@ -22,8 +22,6 @@
#include "filesourcethread.h"
const int FileSourceThread::m_rateDivider = 1000/FILESOURCE_THROTTLE_MS;
FileSourceThread::FileSourceThread(std::ifstream *samplesStream, SampleFifo* sampleFifo, QObject* parent) :
QThread(parent),
m_running(false),
@@ -33,7 +31,9 @@ FileSourceThread::FileSourceThread(std::ifstream *samplesStream, SampleFifo* sam
m_chunksize(0),
m_sampleFifo(sampleFifo),
m_samplesCount(0),
m_samplerate(0)
m_samplerate(0),
m_throttlems(FILESOURCE_THROTTLE_MS),
m_throttleToggle(false)
{
assert(m_ifstream != 0);
}
@@ -57,6 +57,7 @@ void FileSourceThread::startWork()
{
qDebug() << "FileSourceThread::startWork: file stream open, starting...";
m_startWaitMutex.lock();
m_elapsedTimer.start();
start();
while(!m_running)
m_startWaiter.wait(&m_startWaitMutex, 100);
@@ -88,24 +89,37 @@ void FileSourceThread::setSamplerate(int samplerate)
}
m_samplerate = samplerate;
m_chunksize = (m_samplerate / m_rateDivider)*4; // TODO: implement FF and slow motion here. 4 corresponds to live. 2 is half speed, 8 is doulbe speed
m_bufsize = m_chunksize;
// TODO: implement FF and slow motion here. 4 corresponds to live. 2 is half speed, 8 is doulbe speed
m_chunksize = (m_samplerate * 4 * m_throttlems) / 1000;
if (m_buf == 0) {
qDebug() << " - Allocate buffer";
m_buf = (quint8*) malloc(m_bufsize);
} else {
qDebug() << " - Re-allocate buffer";
m_buf = (quint8*) realloc((void*) m_buf, m_bufsize);
}
qDebug() << " - size: " << m_bufsize
<< " #samples: " << (m_bufsize/4);
setBuffer(m_chunksize);
}
//m_samplerate = samplerate;
}
void FileSourceThread::setBuffer(int chunksize)
{
if (chunksize > m_bufsize)
{
m_bufsize = chunksize;
if (m_buf == 0)
{
qDebug() << "FileSourceThread::setBuffer: Allocate buffer";
m_buf = (quint8*) malloc(m_bufsize);
}
else
{
qDebug() << "FileSourceThread::setBuffer: Re-allocate buffer";
m_buf = (quint8*) realloc((void*) m_buf, m_bufsize);
}
qDebug() << "FileSourceThread::setBuffer: size: " << m_bufsize
<< " #samples: " << (m_bufsize/4);
}
}
void FileSourceThread::run()
{
int res;
@@ -131,6 +145,16 @@ void FileSourceThread::tick()
{
if (m_running)
{
qint64 throttlems = m_elapsedTimer.restart();
if (throttlems != m_throttlems)
{
m_throttlems = throttlems;
m_chunksize = (m_samplerate * 4 * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000;
m_throttleToggle = !m_throttleToggle;
setBuffer(m_chunksize);
}
// read samples directly feeding the SampleFifo (no callback)
m_ifstream->read(reinterpret_cast<char*>(m_buf), m_chunksize);