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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 Lesser General Public License as published by
* the Free Software Foundation; either version 3 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 <cassert>
#include <sndfile.h>
#include <config.h>
#include <hugin.hpp>
#include "channel.h"
AudioFile::AudioFile(const std::string& filename, std::size_t filechannel,
InstrumentChannel* instrument_channel)
: filename(filename)
, filechannel(filechannel)
, magic{this}
, instrument_channel(instrument_channel)
{
}
AudioFile::~AudioFile()
{
magic = nullptr;
unload();
}
bool AudioFile::isValid() const
{
//assert(this == magic);
return this == magic;
}
void AudioFile::unload()
{
// Make sure we don't unload the object while loading it...
std::lock_guard<std::mutex> guard(mutex);
is_loaded = false;
preloadedsize = 0;
size = 0;
delete[] data;
data = nullptr;
}
#define BUFFER_SIZE 4096
void AudioFile::load(LogFunction logger, std::size_t sample_limit)
{
// Make sure we don't unload the object while loading it...
std::lock_guard<std::mutex> guard(mutex);
if(this->data) // already loaded
{
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));
if(logger)
{
logger(LogLevel::Warning, "Could not load '" + filename +
"': " + sf_strerror(fh));
}
return;
}
if(sf_info.channels < 1)
{
// This should never happen but lets check just in case.
if(logger)
{
logger(LogLevel::Warning, "Could not load '" + filename +
"': no audio channels available.");
}
return;
}
std::size_t size = sf_info.frames;
std::size_t preloadedsize = sf_info.frames;
if(preloadedsize > sample_limit)
{
preloadedsize = sample_limit;
}
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 >= (std::size_t)sf_info.channels)
{
if(logger)
{
logger(LogLevel::Warning, "Audio file '" + filename +
"' does no have " + std::to_string(filechannel + 1) + " channels.");
}
filechannel = sf_info.channels - 1;
}
sample_t buffer[BUFFER_SIZE];
std::size_t frame_count = BUFFER_SIZE / sf_info.channels;
std::size_t total_frames_read = 0;
int frames_read;
do
{
frames_read = sf_readf_float(fh, buffer, frame_count);
for(int i = 0;
(i < frames_read) && (total_frames_read < sample_limit);
++i)
{
data[total_frames_read++] = buffer[i * sf_info.channels + filechannel];
}
}
while( (frames_read > 0) &&
(total_frames_read < preloadedsize) &&
(total_frames_read < sample_limit) );
// set data size to total bytes read
preloadedsize = total_frames_read;
}
sf_close(fh);
this->data = data;
this->size = size;
this->preloadedsize = preloadedsize;
is_loaded = true;
}
bool AudioFile::isLoaded() const
{
return is_loaded;
}
main_state_t AudioFile::mainState() const
{
if(instrument_channel == nullptr)
{
DEBUG(audiofile, "no instrument_channel!");
return main_state_t::unset;
}
return instrument_channel->main;
}
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