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