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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audiofile.cc
*
* Tue Jul 22 17:14:11 CEST 2008
* Copyright 2008 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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.
*
* DrumGizmo 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 DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* Multichannel feature by John Hammen copyright 2014
*/
#include "audiofile.h"
#include <config.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sndfile.h>
#include <hugin.hpp>
#include "configuration.h"
AudioFile::AudioFile(const std::string& filename, int filechannel)
{
is_loaded = false;
this->filename = filename;
this->filechannel = filechannel;
data = nullptr;
size = 0;
magic = this;
}
AudioFile::~AudioFile()
{
magic = nullptr;
unload();
}
bool AudioFile::isValid() const
{
return this == magic;
}
void AudioFile::unload()
{
// Make sure we don't unload the object while loading it...
MutexAutolock l(mutex);
is_loaded = false;
delete[] data;
data = nullptr;
size = 0;
}
#define BUFFER_SIZE 4092
void AudioFile::load(int num_samples)
{
// Make sure we don't unload the object while loading it...
MutexAutolock l(mutex);
if(data)
{
return;
}
SF_INFO sf_info{};
SNDFILE *fh = sf_open(filename.c_str(), SFM_READ, &sf_info);
if(!fh)
{
ERR(audiofile,"SNDFILE Error (%s): %s\n",
filename.c_str(), sf_strerror(fh));
return;
}
if(num_samples == ALL_SAMPLES)
{
num_samples = sf_info.frames;
}
size = sf_info.frames;
preloadedsize = sf_info.frames;
if(preloadedsize > (size_t)num_samples)
{
preloadedsize = num_samples;
}
sample_t* data = new sample_t[preloadedsize];
if(sf_info.channels == 1)
{
preloadedsize = sf_read_float(fh, data, preloadedsize);
}
else
{
// check filechannel exists
if(filechannel >= sf_info.channels)
{
filechannel = sf_info.channels - 1;
}
sample_t buffer[BUFFER_SIZE];
int readsize = BUFFER_SIZE / sf_info.channels;
int totalread = 0;
int read;
do
{
read = sf_readf_float(fh, buffer, readsize);
for(int i = 0; (i < read) && (totalread < num_samples); ++i)
{
data[totalread++] = buffer[i * sf_info.channels + filechannel];
}
}
while( (read > 0) &&
(totalread < (int)preloadedsize) &&
(totalread < num_samples) );
// set data size to total bytes read
preloadedsize = totalread;
}
sf_close(fh);
this->data = data;
is_loaded = true;
}
bool AudioFile::isLoaded() const
{
return is_loaded;
}
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