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/filesource.h>
  31 #include <ardour/sndfilesource.h>
  32
  33 #include "i18n.h"
  34
  35 using namespace std;
  36 using namespace ARDOUR;
  37 using namespace soundtouch;
  38
  39 AudioRegion*
  40 Session::tempoize_region (TimeStretchRequest& tsr)
  41 {
  42         AudioRegion::SourceList sources;
  43         AudioRegion::SourceList::iterator it;
  44         AudioRegion* r = 0;
  45         SoundTouch st;
  46         string region_name;
  47         string ident = X_("-TIMEFX-");
  48         float percentage;
  49         jack_nframes_t total_frames;
  50         jack_nframes_t done;
  51
  52         /* the soundtouch code wants a *tempo* change percentage, which is
  53            of opposite sign to the length change.
  54         */
  55
  56         percentage = -tsr.fraction;
  57
  58         st.setSampleRate (frame_rate());
  59         st.setChannels (1);
  60         st.setTempoChange (percentage);
  61         st.setPitchSemiTones (0);
  62         st.setRateChange (0);
  63
  64         st.setSetting(SETTING_USE_QUICKSEEK, tsr.quick_seek);
  65         st.setSetting(SETTING_USE_AA_FILTER, tsr.antialias);
  66
  67         vector<string> names = tsr.region->master_source_names();
  68
  69         tsr.progress = 0.0f;
  70         total_frames = tsr.region->length() * tsr.region->n_channels();
  71         done = 0;
  72
  73         for (uint32_t i = 0; i < tsr.region->n_channels(); ++i) {
  74                 string path = path_from_region_name (PBD::basename_nosuffix (names[i]), ident);
  75
  76                 if (path.length() == 0) {
  77                         error << string_compose (_("tempoize: error creating name for new audio file based on %1"), tsr.region->name())
  78                               << endmsg;
  79                         goto out;
  80                 }
  81
  82                 try {
  83                         sources.push_back(new FileSource (path, frame_rate()));
  84                 } catch (failed_constructor& err) {
  85                         error << string_compose (_("tempoize: error creating new audio file %1 (%2)"), path, strerror (errno)) << endmsg;
  86                         goto out;
  87                 }
  88         }
  89
  90         try {
  91                 const jack_nframes_t bufsize = 16384;
  92
  93                 for (uint32_t i = 0; i < sources.size(); ++i) {
  94                         gain_t gain_buffer[bufsize];
  95                         Sample buffer[bufsize];
  96                         char   workbuf[bufsize*4];
  97                         jack_nframes_t pos = 0;
  98                         jack_nframes_t this_read = 0;
  99
 100                         st.clear();
 101                         while (tsr.running && pos < tsr.region->length()) {
 102                                 jack_nframes_t this_time;
 103
 104                                 this_time = min (bufsize, tsr.region->length() - pos);
 105
 106                                 /* read from the master (original) sources for the region,
 107                                    not the ones currently in use, in case it's already been
 108                                    subject to timefx.  */
 109
 110                                 if ((this_read = tsr.region->master_read_at (buffer, buffer, gain_buffer, workbuf, pos + tsr.region->position(), this_time)) != this_time) {
 111                                         error << string_compose (_("tempoize: error reading data from %1"), sources[i]->name()) << endmsg;
 112                                         goto out;
 113                                 }
 114
 115                                 pos += this_read;
 116                                 done += this_read;
 117
 118                                 tsr.progress = (float) done / total_frames;
 119
 120                                 st.putSamples (buffer, this_read);
 121
 122                                 while ((this_read = st.receiveSamples (buffer, bufsize)) > 0 && tsr.running) {
 123                                         if (sources[i]->write (buffer, this_read, workbuf) != this_read) {
 124                                                 error << string_compose (_("error writing tempo-adjusted data to %1"), sources[i]->name()) << endmsg;
 125                                                 goto out;
 126                                         }
 127                                 }
 128                         }
 129
 130                         if (tsr.running) {
 131                                 st.flush ();
 132                         }
 133
 134                         while (tsr.running && (this_read = st.receiveSamples (buffer, bufsize)) > 0) {
 135                                 if (sources[i]->write (buffer, this_read, workbuf) != this_read) {
 136                                         error << string_compose (_("error writing tempo-adjusted data to %1"), sources[i]->name()) << endmsg;
 137                                         goto out;
 138                                 }
 139                         }
 140                 }
 141         } catch (runtime_error& err) {
 142                 error << _("timefx code failure. please notify ardour-developers.") << endmsg;
 143                 error << err.what() << endmsg;
 144                 goto out;
 145         }
 146
 147         time_t now;
 148         struct tm* xnow;
 149         time (&now);
 150         xnow = localtime (&now);
 151
 152         for (it = sources.begin(); it != sources.end(); ++it) {
 153                 dynamic_cast<FileSource*>(*it)->update_header (tsr.region->position(), *xnow, now);
 154         }
 155
 156         region_name = tsr.region->name() + X_(".t");
 157
 158         r = new AudioRegion (sources, 0, sources.front()->length(), region_name,
 159                         0, AudioRegion::Flag (AudioRegion::DefaultFlags | AudioRegion::WholeFile));
 160
 161
 162   out:
 163
 164         if (sources.size()) {
 165
 166                 /* if we failed to complete for any reason, mark the new file
 167                    for deletion.
 168                 */
 169
 170                 if ((r == 0 || !tsr.running)) {
 171                         for (it = sources.begin(); it != sources.end(); ++it) {
 172                                 (*it)->mark_for_remove ();
 173                                 delete *it;
 174                         }
 175                 }
 176         }
 177
 178         /* if the process was cancelled, delete the region */
 179
 180         if (!tsr.running) {
 181                 if (r) {
 182                         delete r;
 183                         r = 0;
 184                 }
 185         }
 186
 187         return r;
 188 }