2 Copyright (C) 2004-2007 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include "pbd/error.h"
25 #include "ardour/types.h"
26 #include "ardour/stretch.h"
27 #include "ardour/audiofilesource.h"
28 #include "ardour/session.h"
29 #include "ardour/audioregion.h"
34 using namespace ARDOUR;
36 using namespace soundtouch;
38 STStretch::STStretch (Session& s, TimeFXRequest& req)
44 /* the soundtouch code wants a *tempo* change percentage, which is
45 of opposite sign to the length change.
48 percentage = -tsr.time_fraction;
50 st.setSampleRate (s.frame_rate());
52 st.setTempoChange (percentage);
53 st.setPitchSemiTones (0);
56 st.setSetting(SETTING_USE_QUICKSEEK, tsr.quick_seek);
57 st.setSetting(SETTING_USE_AA_FILTER, tsr.antialias);
61 STStretch::~STStretch ()
66 STStretch::run (boost::shared_ptr<Region> a_region, Progress* progress)
69 framecnt_t total_frames;
72 const framecnt_t bufsize = 16384;
73 gain_t *gain_buffer = 0;
79 progress->set_progress (0);
82 boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion>(a_region);
84 total_frames = region->length() * region->n_channels();
87 /* the name doesn't need to be super-precise, but allow for 2 fractional
88 digits just to disambiguate close but not identical stretches.
91 snprintf (suffix, sizeof (suffix), "@%d", (int) floor (tsr.time_fraction * 100.0f));
93 /* create new sources */
95 if (make_new_sources (region, nsrcs, suffix)) {
99 gain_buffer = new gain_t[bufsize];
100 buffer = new Sample[bufsize];
102 // soundtouch throws runtime_error on error
105 for (uint32_t i = 0; i < nsrcs.size(); ++i) {
107 boost::shared_ptr<AudioSource> asrc
108 = boost::dynamic_pointer_cast<AudioSource>(nsrcs[i]);
111 framecnt_t this_read = 0;
115 while (!tsr.cancel && pos < region->length()) {
116 framecnt_t this_time;
118 this_time = min (bufsize, region->length() - pos);
120 /* read from the master (original) sources for the region,
121 not the ones currently in use, in case it's already been
125 if ((this_read = region->master_read_at (buffer, buffer, gain_buffer, pos + region->position(), this_time)) != this_time) {
126 error << string_compose (_("tempoize: error reading data from %1"), asrc->name()) << endmsg;
133 progress->set_progress ((float) done / total_frames);
135 st.putSamples (buffer, this_read);
137 while ((this_read = st.receiveSamples (buffer, bufsize)) > 0 && !tsr.cancel) {
138 if (asrc->write (buffer, this_read) != this_read) {
139 error << string_compose (_("error writing tempo-adjusted data to %1"), asrc->name()) << endmsg;
149 while (!tsr.cancel && (this_read = st.receiveSamples (buffer, bufsize)) > 0) {
150 if (asrc->write (buffer, this_read) != this_read) {
151 error << string_compose (_("error writing tempo-adjusted data to %1"), asrc->name()) << endmsg;
157 } catch (runtime_error& err) {
158 error << _("timefx code failure. please notify ardour-developers.") << endmsg;
159 error << err.what() << endmsg;
163 new_name = region->name();
164 at = new_name.find ('@');
166 // remove any existing stretch indicator
168 if (at != string::npos && at > 2) {
169 new_name = new_name.substr (0, at - 1);
174 ret = finish (region, nsrcs, new_name);
176 /* now reset ancestral data for each new region */
178 for (vector<boost::shared_ptr<Region> >::iterator x = results.begin(); x != results.end(); ++x) {
179 framepos_t astart = (*x)->ancestral_start();
180 framepos_t alength = (*x)->ancestral_length();
184 // note: tsr.fraction is a percentage of original length. 100 = no change,
185 // 50 is half as long, 200 is twice as long, etc.
187 float stretch = (*x)->stretch() * (tsr.time_fraction/100.0);
189 start = (framepos_t) floor (astart + ((astart - (*x)->start()) / stretch));
190 length = (framecnt_t) floor (alength / stretch);
192 (*x)->set_ancestral_data (start, length, stretch, (*x)->shift());
197 delete [] gain_buffer;
200 if (ret || tsr.cancel) {
201 for (SourceList::iterator si = nsrcs.begin(); si != nsrcs.end(); ++si) {
202 (*si)->mark_for_remove ();