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 */
  19
  20 #include <cerrno>
  21 #include <stdexcept>
  22
  23 #include <pbd/basename.h>
  24
  25 #include <soundtouch/SoundTouch.h>
  26
  27 #include <ardour/session.h>
  28 #include <ardour/audioregion.h>
  29 #include <ardour/sndfilesource.h>
  30 #include <ardour/region_factory.h>
  31 #include <ardour/source_factory.h>
  32
  33 #include "i18n.h"
  34
  35 using namespace std;
  36 using namespace ARDOUR;
  37 using namespace PBD;
  38 using namespace soundtouch;
  39
  40 boost::shared_ptr<AudioRegion>
  41 Session::tempoize_region (TimeStretchRequest& tsr)
  42 {
  43         SourceList sources;
  44         SourceList::iterator it;
  45         boost::shared_ptr<AudioRegion> r;
  46         SoundTouch st;
  47         string region_name;
  48         string ident = X_("-TIMEFX-");
  49         float percentage;
  50         nframes_t total_frames;
  51         nframes_t done;
  52         int c;
  53         char buf[64];
  54         string::size_type len;
  55
  56         /* the soundtouch code wants a *tempo* change percentage, which is
  57            of opposite sign to the length change.
  58         */
  59
  60         percentage = -tsr.fraction;
  61
  62         st.setSampleRate (frame_rate());
  63         st.setChannels (1);
  64         st.setTempoChange (percentage);
  65         st.setPitchSemiTones (0);
  66         st.setRateChange (0);
  67
  68         st.setSetting(SETTING_USE_QUICKSEEK, tsr.quick_seek);
  69         st.setSetting(SETTING_USE_AA_FILTER, tsr.antialias);
  70
  71         vector<string> names = tsr.region->master_source_names();
  72
  73         tsr.progress = 0.0f;
  74         total_frames = tsr.region->length() * tsr.region->n_channels();
  75         done = 0;
  76
  77         for (uint32_t i = 0; i < tsr.region->n_channels(); ++i) {
  78
  79                 string rstr;
  80                 string::size_type existing_ident;
  81
  82                 if ((existing_ident = names[i].find (ident)) != string::npos) {
  83                         rstr = names[i].substr (0, existing_ident);
  84                 } else {
  85                         rstr = names[i];
  86                 }
  87
  88                 string path = path_from_region_name (PBD::basename_nosuffix (rstr), ident);
  89
  90                 if (path.length() == 0) {
  91                         error << string_compose (_("tempoize: error creating name for new audio file based on %1"), tsr.region->name())
  92                               << endmsg;
  93                         goto out;
  94                 }
  95
  96                 try {
  97                         sources.push_back (boost::dynamic_pointer_cast<AudioFileSource> (SourceFactory::createWritable (*this, path, false, frame_rate())));
  98
  99                 } catch (failed_constructor& err) {
 100                         error << string_compose (_("tempoize: error creating new audio file %1 (%2)"), path, strerror (errno)) << endmsg;
 101                         goto out;
 102                 }
 103
 104         }
 105
 106         try {
 107                 const nframes_t bufsize = 16384;
 108
 109                 for (uint32_t i = 0; i < sources.size(); ++i) {
 110                         gain_t gain_buffer[bufsize];
 111                         Sample buffer[bufsize];
 112                         nframes_t pos = 0;
 113                         nframes_t this_read = 0;
 114
 115                         st.clear();
 116                         while (tsr.running && pos < tsr.region->length()) {
 117                                 nframes_t this_time;
 118
 119                                 this_time = min (bufsize, tsr.region->length() - pos);
 120
 121                                 /* read from the master (original) sources for the region,
 122                                    not the ones currently in use, in case it's already been
 123                                    subject to timefx.  */
 124
 125                                 if ((this_read = tsr.region->master_read_at (buffer, buffer, gain_buffer, pos + tsr.region->position(), this_time)) != this_time) {
 126                                         error << string_compose (_("tempoize: error reading data from %1"), sources[i]->name()) << endmsg;
 127                                         goto out;
 128                                 }
 129
 130                                 pos += this_read;
 131                                 done += this_read;
 132
 133                                 tsr.progress = (float) done / total_frames;
 134
 135                                 st.putSamples (buffer, this_read);
 136
 137                                 while ((this_read = st.receiveSamples (buffer, bufsize)) > 0 && tsr.running) {
 138                                         if (sources[i]->write (buffer, this_read) != this_read) {
 139                                                 error << string_compose (_("error writing tempo-adjusted data to %1"), sources[i]->name()) << endmsg;
 140                                                 goto out;
 141                                         }
 142                                 }
 143                         }
 144
 145                         if (tsr.running) {
 146                                 st.flush ();
 147                         }
 148
 149                         while (tsr.running && (this_read = st.receiveSamples (buffer, bufsize)) > 0) {
 150                                 if (sources[i]->write (buffer, this_read) != this_read) {
 151                                         error << string_compose (_("error writing tempo-adjusted data to %1"), sources[i]->name()) << endmsg;
 152                                         goto out;
 153                                 }
 154                         }
 155                 }
 156         } catch (runtime_error& err) {
 157                 error << _("timefx code failure. please notify ardour-developers.") << endmsg;
 158                 error << err.what() << endmsg;
 159                 goto out;
 160         }
 161
 162         time_t now;
 163         struct tm* xnow;
 164         time (&now);
 165         xnow = localtime (&now);
 166
 167         for (it = sources.begin(); it != sources.end(); ++it) {
 168                 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*it);
 169                 if (afs) {
 170                         afs->update_header (tsr.region->position(), *xnow, now);
 171                 }
 172         }
 173
 174         len = tsr.region->name().length();
 175
 176         while (--len) {
 177                 if (!isdigit (tsr.region->name()[len])) {
 178                         break;
 179                 }
 180         }
 181
 182         if (len == 0) {
 183
 184                 region_name = tsr.region->name() + ".t000";
 185
 186         } else {
 187
 188                 if (tsr.region->name()[len] == 't') {
 189                         c = atoi (tsr.region->name().substr(len+1));
 190
 191                         snprintf (buf, sizeof (buf), "t%03d", ++c);
 192                         region_name = tsr.region->name().substr (0, len) + buf;
 193
 194                 } else {
 195
 196                         /* not sure what this is, just tack the suffix on to it */
 197
 198                         region_name = tsr.region->name() + ".t000";
 199                 }
 200
 201         }
 202
 203         r = (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (sources, 0, sources.front()->length(), region_name,
 204                                                                               0, AudioRegion::Flag (AudioRegion::DefaultFlags | AudioRegion::WholeFile))));
 205
 206   out:
 207
 208         if (sources.size()) {
 209
 210                 /* if we failed to complete for any reason, mark the new file
 211                    for deletion.
 212                 */
 213
 214                 if ((!r || !tsr.running)) {
 215                         for (it = sources.begin(); it != sources.end(); ++it) {
 216                                 (*it)->mark_for_remove ();
 217                         }
 218                 }
 219
 220                 sources.clear ();
 221         }
 222
 223         /* if the process was cancelled, delete the region */
 224
 225         if (!tsr.running) {
 226                 r.reset ();
 227         }
 228
 229         return r;
 230 }