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/*
Copyright (C) 2003 Paul Davis
This program 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.
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.
$Id$
*/
#include <cerrno>
#include <stdexcept>
#include <pbd/basename.h>
#include <soundtouch/SoundTouch.h>
#include <ardour/session.h>
#include <ardour/audioregion.h>
#include <ardour/filesource.h>
#include <ardour/sndfilesource.h>
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace soundtouch;
AudioRegion*
Session::tempoize_region (TimeStretchRequest& tsr)
{
AudioRegion::SourceList sources;
AudioRegion::SourceList::iterator it;
AudioRegion* r = 0;
SoundTouch st;
string region_name;
string ident = X_("-TIMEFX-");
float percentage;
jack_nframes_t total_frames;
jack_nframes_t done;
/* the soundtouch code wants a *tempo* change percentage, which is
of opposite sign to the length change.
*/
percentage = -tsr.fraction;
st.setSampleRate (frame_rate());
st.setChannels (1);
st.setTempoChange (percentage);
st.setPitchSemiTones (0);
st.setRateChange (0);
st.setSetting(SETTING_USE_QUICKSEEK, tsr.quick_seek);
st.setSetting(SETTING_USE_AA_FILTER, tsr.antialias);
vector<string> names = tsr.region->master_source_names();
tsr.progress = 0.0f;
total_frames = tsr.region->length() * tsr.region->n_channels();
done = 0;
for (uint32_t i = 0; i < tsr.region->n_channels(); ++i) {
string path = path_from_region_name (PBD::basename_nosuffix (names[i]), ident);
if (path.length() == 0) {
error << string_compose (_("tempoize: error creating name for new audio file based on %1"), tsr.region->name())
<< endmsg;
goto out;
}
try {
sources.push_back(new FileSource (path, frame_rate()));
} catch (failed_constructor& err) {
error << string_compose (_("tempoize: error creating new audio file %1 (%2)"), path, strerror (errno)) << endmsg;
goto out;
}
}
try {
const jack_nframes_t bufsize = 16384;
for (uint32_t i = 0; i < sources.size(); ++i) {
gain_t gain_buffer[bufsize];
Sample buffer[bufsize];
char workbuf[bufsize*4];
jack_nframes_t pos = 0;
jack_nframes_t this_read = 0;
st.clear();
while (tsr.running && pos < tsr.region->length()) {
jack_nframes_t this_time;
this_time = min (bufsize, tsr.region->length() - pos);
/* read from the master (original) sources for the region,
not the ones currently in use, in case it's already been
subject to timefx. */
if ((this_read = tsr.region->master_read_at (buffer, buffer, gain_buffer, workbuf, pos + tsr.region->position(), this_time)) != this_time) {
error << string_compose (_("tempoize: error reading data from %1"), sources[i]->name()) << endmsg;
goto out;
}
pos += this_read;
done += this_read;
tsr.progress = (float) done / total_frames;
st.putSamples (buffer, this_read);
while ((this_read = st.receiveSamples (buffer, bufsize)) > 0 && tsr.running) {
if (sources[i]->write (buffer, this_read, workbuf) != this_read) {
error << string_compose (_("error writing tempo-adjusted data to %1"), sources[i]->name()) << endmsg;
goto out;
}
}
}
if (tsr.running) {
st.flush ();
}
while (tsr.running && (this_read = st.receiveSamples (buffer, bufsize)) > 0) {
if (sources[i]->write (buffer, this_read, workbuf) != this_read) {
error << string_compose (_("error writing tempo-adjusted data to %1"), sources[i]->name()) << endmsg;
goto out;
}
}
}
} catch (runtime_error& err) {
error << _("timefx code failure. please notify ardour-developers.") << endmsg;
error << err.what() << endmsg;
goto out;
}
time_t now;
struct tm* xnow;
time (&now);
xnow = localtime (&now);
for (it = sources.begin(); it != sources.end(); ++it) {
dynamic_cast<FileSource*>(*it)->update_header (tsr.region->position(), *xnow, now);
}
region_name = tsr.region->name() + X_(".t");
r = new AudioRegion (sources, 0, sources.front()->length(), region_name,
0, AudioRegion::Flag (AudioRegion::DefaultFlags | AudioRegion::WholeFile));
out:
if (sources.size()) {
/* if we failed to complete for any reason, mark the new file
for deletion.
*/
if ((r == 0 || !tsr.running)) {
for (it = sources.begin(); it != sources.end(); ++it) {
(*it)->mark_for_remove ();
delete *it;
}
}
}
/* if the process was cancelled, delete the region */
if (!tsr.running) {
if (r) {
delete r;
r = 0;
}
}
return r;
}
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