git-svn-id: svn://localhost/ardour2/branches/3.0@8166 d708f5d6-7413-0410-9779-e7cbd77b26cf
211 lines
5.2 KiB
C++
211 lines
5.2 KiB
C++
/*
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Copyright (C) 2004-2007 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <algorithm>
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#include <cmath>
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#include "pbd/error.h"
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#include "ardour/types.h"
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#include "ardour/stretch.h"
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#include "ardour/audiofilesource.h"
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#include "ardour/session.h"
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#include "ardour/audioregion.h"
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#include "i18n.h"
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using namespace std;
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using namespace ARDOUR;
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using namespace PBD;
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using namespace soundtouch;
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STStretch::STStretch (Session& s, TimeFXRequest& req)
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: Filter (s)
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, tsr (req)
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{
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float percentage;
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/* the soundtouch code wants a *tempo* change percentage, which is
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of opposite sign to the length change.
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*/
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percentage = -tsr.time_fraction;
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st.setSampleRate (s.frame_rate());
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st.setChannels (1);
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st.setTempoChange (percentage);
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st.setPitchSemiTones (0);
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st.setRateChange (0);
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st.setSetting(SETTING_USE_QUICKSEEK, tsr.quick_seek);
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st.setSetting(SETTING_USE_AA_FILTER, tsr.antialias);
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tsr.progress = 0.0f;
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}
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STStretch::~STStretch ()
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{
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}
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int
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STStretch::run (boost::shared_ptr<Region> a_region)
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{
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SourceList nsrcs;
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framecnt_t total_frames;
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framecnt_t done;
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int ret = -1;
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const framecnt_t bufsize = 16384;
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gain_t *gain_buffer = 0;
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Sample *buffer = 0;
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char suffix[32];
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string new_name;
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string::size_type at;
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tsr.progress = 0.0f;
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tsr.done = false;
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boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion>(a_region);
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total_frames = region->length() * region->n_channels();
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done = 0;
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/* the name doesn't need to be super-precise, but allow for 2 fractional
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digits just to disambiguate close but not identical stretches.
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*/
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snprintf (suffix, sizeof (suffix), "@%d", (int) floor (tsr.time_fraction * 100.0f));
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/* create new sources */
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if (make_new_sources (region, nsrcs, suffix)) {
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goto out;
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}
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gain_buffer = new gain_t[bufsize];
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buffer = new Sample[bufsize];
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// soundtouch throws runtime_error on error
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try {
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for (uint32_t i = 0; i < nsrcs.size(); ++i) {
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boost::shared_ptr<AudioSource> asrc
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= boost::dynamic_pointer_cast<AudioSource>(nsrcs[i]);
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framepos_t pos = 0;
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framecnt_t this_read = 0;
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st.clear();
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while (!tsr.cancel && pos < region->length()) {
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framecnt_t this_time;
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this_time = min (bufsize, region->length() - pos);
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/* read from the master (original) sources for the region,
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not the ones currently in use, in case it's already been
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subject to timefx.
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*/
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if ((this_read = region->master_read_at (buffer, buffer, gain_buffer, pos + region->position(), this_time)) != this_time) {
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error << string_compose (_("tempoize: error reading data from %1"), asrc->name()) << endmsg;
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goto out;
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}
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pos += this_read;
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done += this_read;
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tsr.progress = (float) done / total_frames;
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st.putSamples (buffer, this_read);
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while ((this_read = st.receiveSamples (buffer, bufsize)) > 0 && !tsr.cancel) {
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if (asrc->write (buffer, this_read) != this_read) {
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error << string_compose (_("error writing tempo-adjusted data to %1"), asrc->name()) << endmsg;
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goto out;
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}
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}
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}
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if (!tsr.cancel) {
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st.flush ();
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}
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while (!tsr.cancel && (this_read = st.receiveSamples (buffer, bufsize)) > 0) {
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if (asrc->write (buffer, this_read) != this_read) {
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error << string_compose (_("error writing tempo-adjusted data to %1"), asrc->name()) << endmsg;
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goto out;
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}
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}
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}
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} catch (runtime_error& err) {
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error << _("timefx code failure. please notify ardour-developers.") << endmsg;
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error << err.what() << endmsg;
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goto out;
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}
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new_name = region->name();
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at = new_name.find ('@');
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// remove any existing stretch indicator
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if (at != string::npos && at > 2) {
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new_name = new_name.substr (0, at - 1);
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}
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new_name += suffix;
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ret = finish (region, nsrcs, new_name);
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/* now reset ancestral data for each new region */
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for (vector<boost::shared_ptr<Region> >::iterator x = results.begin(); x != results.end(); ++x) {
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framepos_t astart = (*x)->ancestral_start();
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framepos_t alength = (*x)->ancestral_length();
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framepos_t start;
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framecnt_t length;
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// note: tsr.fraction is a percentage of original length. 100 = no change,
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// 50 is half as long, 200 is twice as long, etc.
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float stretch = (*x)->stretch() * (tsr.time_fraction/100.0);
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start = (framepos_t) floor (astart + ((astart - (*x)->start()) / stretch));
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length = (framecnt_t) floor (alength / stretch);
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(*x)->set_ancestral_data (start, length, stretch, (*x)->shift());
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}
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out:
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delete [] gain_buffer;
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delete [] buffer;
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if (ret || tsr.cancel) {
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for (SourceList::iterator si = nsrcs.begin(); si != nsrcs.end(); ++si) {
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(*si)->mark_for_remove ();
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}
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}
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tsr.done = true;
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return ret;
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}
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