libs/ardour/session_timefx.cc

   1 /*
   2     Copyright (C) 2003 Paul Davis
   3
   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.
   8
   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.
  13
  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.
  17
  18     $Id$
  19 */
  20
  21 #include <cerrno>
  22 #include <stdexcept>
  23
  24 #include <pbd/basename.h>
  25
  26 #include <soundtouch/SoundTouch.h>
  27
  28 #include <ardour/session.h>
  29 #include <ardour/audioregion.h>
  30 #include <ardour/sndfilesource.h>
  31 #include <ardour/region_factory.h>
  32 #include <ardour/source_factory.h>
  33
  34 #include "i18n.h"
  35
  36 using namespace std;
  37 using namespace ARDOUR;
  38 using namespace PBD;
  39 using namespace soundtouch;
  40
  41 boost::shared_ptr<AudioRegion>
  42 Session::tempoize_region (TimeStretchRequest& tsr)
  43 {
  44         SourceList sources;
  45         SourceList::iterator it;
  46         boost::shared_ptr<AudioRegion> r;
  47         SoundTouch st;
  48         string region_name;
  49         string ident = X_("-TIMEFX-");
  50         float percentage;
  51         nframes_t total_frames;
  52         nframes_t done;
  53
  54         /* the soundtouch code wants a *tempo* change percentage, which is
  55            of opposite sign to the length change.
  56         */
  57
  58         percentage = -tsr.fraction;
  59
  60         st.setSampleRate (frame_rate());
  61         st.setChannels (1);
  62         st.setTempoChange (percentage);
  63         st.setPitchSemiTones (0);
  64         st.setRateChange (0);
  65
  66         st.setSetting(SETTING_USE_QUICKSEEK, tsr.quick_seek);
  67         st.setSetting(SETTING_USE_AA_FILTER, tsr.antialias);
  68
  69         vector<string> names = tsr.region->master_source_names();
  70
  71         tsr.progress = 0.0f;
  72         total_frames = tsr.region->length() * tsr.region->n_channels();
  73         done = 0;
  74
  75         for (uint32_t i = 0; i < tsr.region->n_channels(); ++i) {
  76                 string path = path_from_region_name (PBD::basename_nosuffix (names[i]), ident);
  77
  78                 if (path.length() == 0) {
  79                         error << string_compose (_("tempoize: error creating name for new audio file based on %1"), tsr.region->name())
  80                               << endmsg;
  81                         goto out;
  82                 }
  83
  84                 try {
  85                         sources.push_back (boost::dynamic_pointer_cast<AudioFileSource> (SourceFactory::createWritable (*this, path, false, frame_rate())));
  86
  87                 } catch (failed_constructor& err) {
  88                         error << string_compose (_("tempoize: error creating new audio file %1 (%2)"), path, strerror (errno)) << endmsg;
  89                         goto out;
  90                 }
  91         }
  92
  93         try {
  94                 const nframes_t bufsize = 16384;
  95
  96                 for (uint32_t i = 0; i < sources.size(); ++i) {
  97                         gain_t gain_buffer[bufsize];
  98                         Sample buffer[bufsize];
  99                         nframes_t pos = 0;
 100                         nframes_t this_read = 0;
 101
 102                         st.clear();
 103                         while (tsr.running && pos < tsr.region->length()) {
 104                                 nframes_t this_time;
 105
 106                                 this_time = min (bufsize, tsr.region->length() - pos);
 107
 108                                 /* read from the master (original) sources for the region,
 109                                    not the ones currently in use, in case it's already been
 110                                    subject to timefx.  */
 111
 112                                 if ((this_read = tsr.region->master_read_at (buffer, buffer, gain_buffer, pos + tsr.region->position(), this_time)) != this_time) {
 113                                         error << string_compose (_("tempoize: error reading data from %1"), sources[i]->name()) << endmsg;
 114                                         goto out;
 115                                 }
 116
 117                                 pos += this_read;
 118                                 done += this_read;
 119
 120                                 tsr.progress = (float) done / total_frames;
 121
 122                                 st.putSamples (buffer, this_read);
 123
 124                                 while ((this_read = st.receiveSamples (buffer, bufsize)) > 0 && tsr.running) {
 125                                         if (sources[i]->write (buffer, this_read) != this_read) {
 126                                                 error << string_compose (_("error writing tempo-adjusted data to %1"), sources[i]->name()) << endmsg;
 127                                                 goto out;
 128                                         }
 129                                 }
 130                         }
 131
 132                         if (tsr.running) {
 133                                 st.flush ();
 134                         }
 135
 136                         while (tsr.running && (this_read = st.receiveSamples (buffer, bufsize)) > 0) {
 137                                 if (sources[i]->write (buffer, this_read) != this_read) {
 138                                         error << string_compose (_("error writing tempo-adjusted data to %1"), sources[i]->name()) << endmsg;
 139                                         goto out;
 140                                 }
 141                         }
 142                 }
 143         } catch (runtime_error& err) {
 144                 error << _("timefx code failure. please notify ardour-developers.") << endmsg;
 145                 error << err.what() << endmsg;
 146                 goto out;
 147         }
 148
 149         time_t now;
 150         struct tm* xnow;
 151         time (&now);
 152         xnow = localtime (&now);
 153
 154         for (it = sources.begin(); it != sources.end(); ++it) {
 155                 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*it);
 156                 if (afs) {
 157                         afs->update_header (tsr.region->position(), *xnow, now);
 158                 }
 159         }
 160
 161         region_name = tsr.region->name() + X_(".t");
 162
 163         r = (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (sources, 0, sources.front()->length(), region_name,
 164                                                                               0, AudioRegion::Flag (AudioRegion::DefaultFlags | AudioRegion::WholeFile))));
 165
 166   out:
 167
 168         if (sources.size()) {
 169
 170                 /* if we failed to complete for any reason, mark the new file
 171                    for deletion.
 172                 */
 173
 174                 if ((!r || !tsr.running)) {
 175                         for (it = sources.begin(); it != sources.end(); ++it) {
 176                                 (*it)->mark_for_remove ();
 177                         }
 178                 }
 179
 180                 sources.clear ();
 181         }
 182
 183         /* if the process was cancelled, delete the region */
 184
 185         if (!tsr.running) {
 186                 r.reset ();
 187         }
 188
 189         return r;
 190 }