/***************************************************************************
* Copyright (C) 2016 by Ilya Kotov *
* forkotov02@ya.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 <QSettings>
#include <math.h>
#include <stdlib.h>
#include <qmmp/qmmp.h>
#include "soxresampler.h"
SoXResampler::SoXResampler() : Effect()
{
m_soxr = 0;
m_out = 0;
m_out_samples = 0;
QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
m_overSamplingFs = settings.value("SOXR/sample_rate", 48000).toInt();
m_quality = soxr_quality_spec(settings.value("SOXR/quality", SOXR_HQ).toInt(), 0);
}
SoXResampler::~SoXResampler()
{
freeSoXR();
}
void SoXResampler::applyEffect(Buffer *b)
{
if(m_soxr && b->samples > 0)
{
size_t done = 0;
soxr_process(m_soxr, b->data, b->samples / channels(), 0,
m_out, m_out_samples / channels(), &done);
b->samples = done * channels();
if(b->samples > b->size)
{
delete [] b->data;
b->data = new float[b->samples];
b->size = b->samples;
}
memcpy(b->data, m_out, b->samples * sizeof(float));
}
}
void SoXResampler::configure(quint32 freq, ChannelMap map)
{
freeSoXR();
if(freq != m_overSamplingFs)
{
soxr_error_t error = 0;
m_soxr = soxr_create(freq, m_overSamplingFs, map.count(), &error, 0, &m_quality, 0);
double ratio = (double)m_overSamplingFs/freq;
m_out_samples = ratio * QMMP_BLOCK_FRAMES * map.count() * 2 + 2;
m_out = new float[m_out_samples];
}
Effect::configure(m_overSamplingFs, map);
}
void SoXResampler::freeSoXR()
{
if(m_soxr)
{
soxr_delete(m_soxr);
m_soxr = 0;
}
if(m_out)
{
delete [] m_out;
m_out = 0;
m_out_samples = 0;
}
}
