libs/ardour/filter.cc

   1 /*
   2     Copyright (C) 2004-2007 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 <time.h>
  21 #include <cerrno>
  22
  23 #include "pbd/basename.h"
  24
  25 #include "ardour/analyser.h"
  26 #include "ardour/audiofilesource.h"
  27 #include "ardour/audioregion.h"
  28 #include "ardour/filter.h"
  29 #include "ardour/region.h"
  30 #include "ardour/region_factory.h"
  31 #include "ardour/session.h"
  32 #include "ardour/smf_source.h"
  33 #include "ardour/source_factory.h"
  34
  35 #include "pbd/i18n.h"
  36
  37 using namespace std;
  38 using namespace ARDOUR;
  39 using namespace PBD;
  40
  41 int
  42 Filter::make_new_sources (boost::shared_ptr<Region> region, SourceList& nsrcs, std::string suffix, bool use_session_sample_rate)
  43 {
  44         vector<string> names = region->master_source_names();
  45         assert (region->n_channels() <= names.size());
  46
  47         for (uint32_t i = 0; i < region->n_channels(); ++i) {
  48
  49                 string name = PBD::basename_nosuffix (names[i]);
  50
  51                 /* remove any existing version of suffix by assuming it starts
  52                    with some kind of "special" character.
  53                 */
  54
  55                 if (!suffix.empty()) {
  56                         string::size_type pos = name.find (suffix[0]);
  57                         if (pos != string::npos && pos > 2) {
  58                                 name = name.substr (0, pos - 1);
  59                         }
  60                 }
  61
  62                 const string path = (region->data_type() == DataType::MIDI)
  63                         ? session.new_midi_source_path (name)
  64                         : session.new_audio_source_path (name, region->n_channels(), i, false, false);
  65
  66                 if (path.empty()) {
  67                         error << string_compose (_("filter: error creating name for new file based on %1"), region->name())
  68                               << endmsg;
  69                         return -1;
  70                 }
  71
  72                 try {
  73                         samplecnt_t sample_rate;
  74                         if (use_session_sample_rate) {
  75                                 sample_rate = session.sample_rate();
  76                         } else {
  77                                 boost::shared_ptr<AudioRegion> aregion = boost::dynamic_pointer_cast<AudioRegion>(region);
  78
  79                                 if (aregion) {
  80                                         sample_rate = aregion->audio_source()->sample_rate();
  81                                 } else {
  82                                         return -1;
  83                                 }
  84                         }
  85
  86                         nsrcs.push_back (boost::dynamic_pointer_cast<Source> (
  87                                                  SourceFactory::createWritable (region->data_type(), session,
  88                                                                                 path, false, sample_rate)));
  89                 }
  90
  91                 catch (failed_constructor& err) {
  92                         error << string_compose (_("filter: error creating new file %1 (%2)"), path, strerror (errno)) << endmsg;
  93                         return -1;
  94                 }
  95         }
  96
  97         return 0;
  98 }
  99
 100 int
 101 Filter::finish (boost::shared_ptr<Region> region, SourceList& nsrcs, string region_name)
 102 {
 103         /* update headers on new sources */
 104
 105         time_t xnow;
 106         struct tm* now;
 107
 108         time (&xnow);
 109         now = localtime (&xnow);
 110
 111         /* this is ugly. */
 112         for (SourceList::iterator si = nsrcs.begin(); si != nsrcs.end(); ++si) {
 113                 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*si);
 114                 if (afs) {
 115                         afs->done_with_peakfile_writes ();
 116                         afs->update_header (region->position(), *now, xnow);
 117                         afs->mark_immutable ();
 118                 }
 119
 120                 boost::shared_ptr<SMFSource> smfs = boost::dynamic_pointer_cast<SMFSource>(*si);
 121                 if (smfs) {
 122                         smfs->set_timeline_position (region->position());
 123                         smfs->flush ();
 124                 }
 125
 126                 /* now that there is data there, requeue the file for analysis */
 127
 128                 Analyser::queue_source_for_analysis (*si, false);
 129         }
 130
 131         /* create a new region */
 132
 133         if (region_name.empty()) {
 134                 region_name = RegionFactory::new_region_name (region->name());
 135         }
 136         results.clear ();
 137
 138         PropertyList plist;
 139
 140         plist.add (Properties::start, 0);
 141         plist.add (Properties::length, region->length());
 142         plist.add (Properties::name, region_name);
 143         plist.add (Properties::whole_file, true);
 144         plist.add (Properties::position, region->position());
 145
 146         boost::shared_ptr<Region> r = RegionFactory::create (nsrcs, plist);
 147
 148         boost::shared_ptr<AudioRegion> audio_region = boost::dynamic_pointer_cast<AudioRegion> (region);
 149         boost::shared_ptr<AudioRegion> audio_r = boost::dynamic_pointer_cast<AudioRegion> (r);
 150         if (audio_region && audio_r) {
 151                 audio_r->set_scale_amplitude (audio_region->scale_amplitude());
 152                 audio_r->set_fade_in_active (audio_region->fade_in_active ());
 153                 audio_r->set_fade_in (audio_region->fade_in ());
 154                 audio_r->set_fade_out_active (audio_region->fade_out_active ());
 155                 audio_r->set_fade_out (audio_region->fade_out ());
 156                 *(audio_r->envelope()) = *(audio_region->envelope ());
 157         }
 158         results.push_back (r);
 159
 160         return 0;
 161 }
 162
 163