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/*
*
* $Id: k3baudiomaxspeedjob.cpp 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2005 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* See the file "COPYING" for the exact licensing terms.
*/
#include "k3baudiomaxspeedjob.h"
#include "k3baudiotrack.h"
#include "k3baudiodatasource.h"
#include "k3baudiodoc.h"
#include "k3baudiocdtracksource.h"
#include "k3baudiodatasourceiterator.h"
#include <k3bdevice.h>
#include <k3bthread.h>
#include <kdebug.h>
#include <klocale.h>
#include <tqdatetime.h>
class K3bAudioMaxSpeedJob::WorkThread : public K3bThread
{
public:
WorkThread( K3bAudioDoc* doc );
~WorkThread();
void run();
int speedTest( K3bAudioDataSource* source );
void cancel();
int maxSpeedByMedia() const;
int maxSpeed;
private:
K3bAudioDoc* m_doc;
bool m_canceled;
char* m_buffer;
};
K3bAudioMaxSpeedJob::WorkThread::WorkThread( K3bAudioDoc* doc )
: K3bThread(),
m_doc(doc),
m_canceled(false)
{
m_buffer = new char[2352*10];
}
K3bAudioMaxSpeedJob::WorkThread::~WorkThread()
{
delete [] m_buffer;
}
void K3bAudioMaxSpeedJob::WorkThread::run()
{
kdDebug() << k_funcinfo << endl;
m_canceled = false;
emitStarted();
K3bAudioDataSourceIterator it( m_doc );
// count sources for minimal progress info
int numSources = 0;
int sourcesDone = 0;
while( it.current() ) {
++numSources;
it.next();
}
bool success = true;
maxSpeed = 175*1000;
it.first();
while( it.current() && !m_canceled ) {
if( !it.current()->seek(0) ) {
kdDebug() << "(K3bAudioMaxSpeedJob) seek failed." << endl;
success = false;
break;
}
// read some data
int speed = speedTest( it.current() );
++sourcesDone;
emitPercent( 100*numSources/sourcesDone );
if( speed < 0 ) {
success = false;
break;
}
else if( speed > 0 ) {
// update the max speed
maxSpeed = TQMIN( maxSpeed, speed );
}
it.next();
}
if( m_canceled ) {
emitCanceled();
success = false;
}
if( success )
kdDebug() << "(K3bAudioMaxSpeedJob) max speed: " << maxSpeed << endl;
emitFinished( success );
}
// returns the amount of data read from this source
int K3bAudioMaxSpeedJob::WorkThread::speedTest( K3bAudioDataSource* source )
{
//
// in case of an audio track source we only test when the cd is inserted since asking the user would
// confuse him a lot.
//
// FIXME: there is still the problem of the spin up time.
//
if( K3bAudioCdTrackSource* cdts = dynamic_cast<K3bAudioCdTrackSource*>( source ) ) {
if( K3bDevice::Device* dev = cdts->searchForAudioCD() ) {
cdts->setDevice( dev );
}
else {
kdDebug() << "(K3bAudioMaxSpeedJob) ignoring audio cd track source." << endl;
return 0;
}
}
TQTime t;
int dataRead = 0;
int r = 0;
// start the timer
t.start();
// read ten seconds of audio data. This is some value which seemed about right. :)
while( dataRead < 2352*75*10 && (r = source->read( m_buffer, 2352*10 )) > 0 ) {
dataRead += r;
}
// elapsed millisec
int usedT = t.elapsed();
if( r < 0 ) {
kdDebug() << "(K3bAudioMaxSpeedJob) read failure." << endl;
return -1;
}
// KB/sec (add 1 millisecond to avoid division by 0)
int throughput = (dataRead*1000+usedT)/(usedT+1)/1024;
kdDebug() << "(K3bAudioMaxSpeedJob) throughput: " << throughput
<< " (" << dataRead << "/" << usedT << ")" << endl;
return throughput;
}
void K3bAudioMaxSpeedJob::WorkThread::cancel()
{
kdDebug() << k_funcinfo << endl;
m_canceled = true;
}
int K3bAudioMaxSpeedJob::WorkThread::maxSpeedByMedia() const
{
int s = 0;
TQValueList<int> speeds = m_doc->burner()->determineSupportedWriteSpeeds();
// simply use what we have and let the writer decide if the speeds are empty
if( !speeds.isEmpty() ) {
// start with the highest speed and go down the list until we are below our max
TQValueListIterator<int> it = speeds.end();
--it;
while( *it > maxSpeed && it != speeds.begin() )
--it;
// this is the first valid speed or the lowest supported one
s = *it;
kdDebug() << "(K3bAudioMaxSpeedJob) using speed factor: " << (s/175) << endl;
}
return s;
}
K3bAudioMaxSpeedJob::K3bAudioMaxSpeedJob( K3bAudioDoc* doc, K3bJobHandler* jh, TQObject* tqparent, const char* name )
: K3bThreadJob( jh, tqparent, name )
{
m_thread = new WorkThread( doc );
setThread( m_thread );
}
K3bAudioMaxSpeedJob::~K3bAudioMaxSpeedJob()
{
delete m_thread;
}
int K3bAudioMaxSpeedJob::maxSpeed() const
{
return m_thread->maxSpeedByMedia();
}
#include "k3baudiomaxspeedjob.moc"
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