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//=============================================================================
// MusE Score
// Linux Music Score Editor
// $Id: exportaudio.cpp 5660 2012-05-22 14:17:39Z wschweer $
//
// Copyright (C) 2009 Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include "config.h"
#ifdef HAS_AUDIOFILE
#include <sndfile.h>
#include "libmscore/score.h"
#include "fluid/fluid.h"
// #include "libmscore/tempo.h"
#include "libmscore/note.h"
#include "musescore.h"
#include "libmscore/part.h"
#include "preferences.h"
#include "seq.h"
#include "libmscore/mscore.h"
//---------------------------------------------------------
// saveAudio
//---------------------------------------------------------
bool MuseScore::saveAudio(Score* score, const QString& name, const QString& ext)
{
int format;
if (ext == "wav")
format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
else if (ext == "ogg")
format = SF_FORMAT_OGG | SF_FORMAT_VORBIS;
else if (ext == "flac")
format = SF_FORMAT_FLAC | SF_FORMAT_PCM_16;
else {
qDebug("unknown audio file type <%s>\n", qPrintable(ext));
return false;
}
int sampleRate = preferences.exportAudioSampleRate;
MasterSynth* synti = new MasterSynth();
synti->init(sampleRate);
synti->setState(score->syntiState());
int oldSampleRate = MScore::sampleRate;
MScore::sampleRate = sampleRate;
EventMap events;
score->toEList(&events);
SF_INFO info;
memset(&info, 0, sizeof(info));
info.channels = 2;
info.samplerate = sampleRate;
info.format = format;
SNDFILE* sf = sf_open(qPrintable(name), SFM_WRITE, &info);
if (sf == 0) {
qDebug("open soundfile failed: %s\n", sf_strerror(sf));
delete synti;
MScore::sampleRate = oldSampleRate;
return false;
}
QProgressBar* pBar = showProgressBar();
pBar->reset();
float peak = 0.0;
double gain = 1.0;
EventMap::const_iterator endPos = events.constEnd();
--endPos;
const int et = (score->utick2utime(endPos.key()) + 1) * MScore::sampleRate;
for (int pass = 0; pass < 2; ++pass) {
EventMap::const_iterator playPos;
playPos = events.constBegin();
pBar->setRange(0, et);
//
// init instruments
//
foreach(const Part* part, score->parts()) {
foreach(const Channel& a, part->instr()->channel()) {
a.updateInitList();
foreach(Event e, a.init) {
if (e.type() == ME_INVALID)
continue;
e.setChannel(a.channel);
int syntiIdx= score->midiMapping(a.channel)->articulation->synti;
synti->play(e, syntiIdx);
}
}
}
static const unsigned FRAMES = 512;
float buffer[FRAMES * 2];
int playTime = 0;
synti->setGain(gain);
for (;;) {
unsigned frames = FRAMES;
//
// collect events for one segment
//
memset(buffer, 0, sizeof(float) * FRAMES * 2);
int endTime = playTime + frames;
float* p = buffer;
for (; playPos != events.constEnd(); ++playPos) {
int f = score->utick2utime(playPos.key()) * MScore::sampleRate;
if (f >= endTime)
break;
int n = f - playTime;
synti->process(n, p);
p += 2 * n;
playTime += n;
frames -= n;
const Event& e = playPos.value();
if (e.isChannelEvent()) {
int channelIdx = e.channel();
Channel* c = score->midiMapping(channelIdx)->articulation;
if (!c->mute) {
synti->play(e, c->synti);
}
}
}
if (frames) {
synti->process(frames, p);
playTime += frames;
}
if (pass == 1)
sf_writef_float(sf, buffer, FRAMES);
else {
for (unsigned i = 0; i < FRAMES * 2; ++i)
peak = qMax(peak, qAbs(buffer[i]));
}
playTime = endTime;
pBar->setValue(playTime);
if (playTime >= et)
break;
}
gain = 0.99 / peak;
}
hideProgressBar();
MScore::sampleRate = oldSampleRate;
delete synti;
if (sf_close(sf)) {
qDebug("close soundfile failed\n");
return false;
}
return true;
}
#endif // HAS_AUDIOFILE
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