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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* wavfileoutputengine.cc
*
* Sat May 14 13:26:51 CEST 2016
* Copyright 2016 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.
*/
#include "wavfileoutputengine.h"
#include <iostream>
WavfileOutputEngine::WavfileOutputEngine()
: AudioOutputEngine{}
, info{}
, file{"output"}
{
info.samplerate = 44100;
info.channels = 1;
info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
}
WavfileOutputEngine::~WavfileOutputEngine()
{
sf_close(handle);
}
bool WavfileOutputEngine::init(const Channels& data)
{
info.channels = data.size();
handle = sf_open(file.c_str(), SFM_WRITE, &info);
if(handle == nullptr)
{
std::cerr << "[WavfileOutputEngine] Failed to open "
<< file << " for writing.\n";
return false;
}
return true;
}
void WavfileOutputEngine::setParm(const std::string& parm, const std::string& value)
{
if(parm == "file")
{
// apply output filename prefix
file = value;
}
else if(parm == "srate")
{
// try to apply samplerate
try
{
info.samplerate = std::stoi(value);
}
catch(...)
{
std::cerr << "[WavfileOutputEngine] Invalid samplerate " << value
<< "\n";
}
}
else
{
std::cerr << "[WavfileOutputEngine] Unsupported parameter '" << parm
<< "'\n";
}
}
bool WavfileOutputEngine::start()
{
return true;
}
void WavfileOutputEngine::stop()
{
}
void WavfileOutputEngine::pre(size_t nsamples)
{
}
void WavfileOutputEngine::run(int ch, sample_t* samples, size_t nsamples)
{
if(ch >= info.channels)
{
std::cerr << "[WavfileOutputEngine] cannot access channel #" << ch
<< " (" << info.channels << " channels available)\n";
return;
}
for(std::size_t i = 0; i < nsamples; ++i)
{
buffer[i * info.channels + ch] = samples[i];
}
}
void WavfileOutputEngine::post(size_t nsamples)
{
sf_writef_float(handle, buffer, nsamples);
}
size_t WavfileOutputEngine::getSamplerate() const
{
return info.samplerate;
}
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