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/***************************************************************************
* Copyright (C) 2013 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* 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. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <stdio.h>
#include <stdint.h>
#include <QStringList>
#include <QThread>
#include <qmmp/inputsourcefactory.h>
#include <qmmp/decoderfactory.h>
#include "rgscaner.h"
RGScaner::RGScaner()
{
m_gain = 0.;
m_peak = 0.;
m_user_stop = false;
m_is_running = false;
m_handle = 0;
m_decoder = 0;
m_source = 0;
}
RGScaner::~RGScaner()
{
stop();
if(m_handle)
{
DeinitGainAbalysis(m_handle);
m_handle = 0;
}
if(m_decoder)
{
delete m_decoder;
m_decoder = 0;
}
if(m_source)
{
delete m_source;
m_source = 0;
}
}
bool RGScaner::prepare(const QString &url)
{
m_url = url;
InputSource *source = InputSource::create(url, 0);
if(!source->initialize())
{
delete source;
qWarning("RGScaner: Invalid url");
return false;
}
if(source->ioDevice())
{
if(!source->ioDevice()->open(QIODevice::ReadOnly))
{
delete source;
qWarning("RGScaner: unable to open input stream, error: %s",
qPrintable(m_source->ioDevice()->errorString()));
return false;
}
}
DecoderFactory *factory = Decoder::findByPath(source->url());
if(!factory)
{
qWarning("RGScaner: unsupported file format");
delete source;
return false;
}
qDebug("RGScaner: selected decoder: %s",qPrintable(factory->properties().shortName));
if(factory->properties().noInput && source->ioDevice())
source->ioDevice()->close();
Decoder *decoder = factory->create(source->url(), source->ioDevice());
if(!decoder->initialize())
{
qWarning("RGScaner: invalid file format");
delete source;
delete decoder;
return false;
}
m_decoder = decoder;
m_source = source;
return true;
}
void RGScaner::stop()
{
m_mutex.lock();
m_user_stop = true;
m_mutex.unlock();
wait();
}
bool RGScaner::isRunning()
{
return m_is_running;
}
double RGScaner::gain() const
{
return m_gain;
}
double RGScaner::peak() const
{
return m_peak;
}
GainHandle_t *RGScaner::handle()
{
return m_handle;
}
void RGScaner::run()
{
m_is_running = true;
qDebug("RGScaner: staring thread %lu", QThread::currentThreadId());
m_user_stop = false;
const int buf_size = 8192; //samples
AudioParameters ap = m_decoder->audioParameters();
//Qmmp::AudioFormat format = ap.format();
unsigned char output_buf[buf_size];
qint64 output_at = 0;
qint64 total = 0;
qint64 len = 0;
qint64 totalSize = m_decoder->totalTime() * ap.sampleRate() * ap.channels() * ap.sampleSize() / 1000;
qint32 max = 0;
double out_left[buf_size/4];
double out_right[buf_size/4];
if(m_handle)
{
DeinitGainAbalysis(m_handle);
m_handle = 0;
}
InitGainAnalysis(&m_handle, 44100);
forever
{
// decode
len = m_decoder->read((char *)(output_buf + output_at), buf_size - output_at);
if (len > 0)
{
output_at += len;
total += len;
emit progress(100 * total / totalSize);
for(int i = 0; i < len/4; ++i)
{
out_left[i] = ((short *) output_buf)[i*2];
out_right[i] = ((short *) output_buf)[i*2+1];
max = qMax(abs(out_left[i]), max);
max = qMax(abs(out_right[i]), max);
}
AnalyzeSamples(m_handle, out_left, out_right, len/4, 2);
output_at = 0;
}
else if (len <= 0)
break;
m_mutex.lock();
if(m_user_stop)
{
m_mutex.unlock();
break;
}
m_mutex.unlock();
}
m_gain = GetTitleGain(m_handle);
m_peak = max / 32768.0;
qDebug("peak = %f", m_peak);
qDebug("RGScaner: thread %ld finished", QThread::currentThreadId());
m_is_running = false;
emit progress(100);
emit finished(m_url);
}
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