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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* wavfile.cc
*
* Mi 20. Jan 16:57:16 CET 2016
* Copyright 2016 Christian Glöckner
* cgloeckner@freenet.de
****************************************************************************/
/*
* 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.
*/
#include <iostream>
#include "wavfile.h"
WavfileOutputEngine::WavfileOutputEngine()
: info{}
, channels{}
, file{"output"} {
info.frames = 0;
info.samplerate = 44100;
info.channels = 1;
info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
info.sections = 0;
info.seekable = 0;
}
WavfileOutputEngine::~WavfileOutputEngine() {
for (auto& ptr: channels) {
if (ptr != nullptr) {
sf_close(ptr);
}
}
}
bool WavfileOutputEngine::init(Channels data) {
channels.clear(),
channels.resize(data.size()); // value-initialized with null
for (auto i = 0u; i < data.size(); ++i) {
// write channel to file
auto fname = file + data[i].name + "-" + std::to_string(i) + ".wav";
channels[i] = sf_open(fname.c_str(), SFM_WRITE, &info);
if (channels[i] == nullptr) {
std::cerr << "[WaffileOutputEngine] Failed to initialize "
<< "channel #" << i << "\n";
return false;
}
}
return true;
}
void WavfileOutputEngine::setParm(std::string parm, 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 (static_cast<unsigned int>(ch) >= channels.size()) {
std::cerr << "[WavfileOutputEngine] cannot access channel #"
<< ch << " (" << channels.size() << " channels available)\n";
return;
}
sf_writef_float(channels[ch], samples, nsamples);
}
void WavfileOutputEngine::post(size_t nsamples) {
}
size_t WavfileOutputEngine::samplerate() {
return info.samplerate;
}
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