libs/ardour/source_factory.cc

   1 /*
   2     Copyright (C) 2000-2006 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 <pbd/error.h>
  22
  23 #include <ardour/source_factory.h>
  24 #include <ardour/sndfilesource.h>
  25 #include <ardour/silentfilesource.h>
  26 #include <ardour/configuration.h>
  27
  28 #ifdef HAVE_COREAUDIO
  29 #include <ardour/coreaudiosource.h>
  30 #endif
  31
  32 #include "i18n.h"
  33
  34 using namespace ARDOUR;
  35 using namespace std;
  36 using namespace PBD;
  37
  38 sigc::signal<void,boost::shared_ptr<Source> > SourceFactory::SourceCreated;
  39
  40 int
  41 SourceFactory::setup_peakfile (boost::shared_ptr<Source> s)
  42 {
  43         boost::shared_ptr<AudioSource> as (boost::dynamic_pointer_cast<AudioSource> (s));
  44         if (as) {
  45                 if (as->setup_peakfile ()) {
  46                         error << string_compose("SourceFactory: could not set up peakfile for %1", as->name()) << endmsg;
  47                         return -1;
  48                 }
  49         }
  50
  51         return 0;
  52 }
  53
  54 boost::shared_ptr<Source>
  55 SourceFactory::createSilent (Session& s, const XMLNode& node, nframes_t nframes, float sr)
  56 {
  57         boost::shared_ptr<Source> ret (new SilentFileSource (s, node, nframes, sr));
  58         SourceCreated (ret);
  59         return ret;
  60 }
  61
  62 #ifdef HAVE_COREAUDIO
  63 boost::shared_ptr<Source>
  64 SourceFactory::create (Session& s, const XMLNode& node)
  65 {
  66         try {
  67                 boost::shared_ptr<Source> ret (new CoreAudioSource (s, node));
  68                 if (setup_peakfile (ret)) {
  69                         return boost::shared_ptr<Source>();
  70                 }
  71                 SourceCreated (ret);
  72                 return ret;
  73         }
  74
  75
  76         catch (failed_constructor& err) {
  77
  78                 /* this is allowed to throw */
  79
  80                 boost::shared_ptr<Source> ret (new SndFileSource (s, node));
  81                 if (setup_peakfile (ret)) {
  82                         return boost::shared_ptr<Source>();
  83                 }
  84                 SourceCreated (ret);
  85                 return ret;
  86         }
  87
  88         return boost::shared_ptr<Source>();
  89 }
  90
  91 #else
  92
  93 boost::shared_ptr<Source>
  94 SourceFactory::create (Session& s, const XMLNode& node)
  95 {
  96         /* this is allowed to throw */
  97
  98         boost::shared_ptr<Source> ret (new SndFileSource (s, node));
  99
 100         if (setup_peakfile (ret)) {
 101                 return boost::shared_ptr<Source>();
 102         }
 103
 104         SourceCreated (ret);
 105         return ret;
 106 }
 107
 108 #endif // HAVE_COREAUDIO
 109
 110 #ifdef HAVE_COREAUDIO
 111 boost::shared_ptr<Source>
 112 SourceFactory::createReadable (Session& s, string path, int chn, AudioFileSource::Flag flags, bool announce)
 113 {
 114         if (!(flags & Destructive)) {
 115
 116                 try {
 117                         boost::shared_ptr<Source> ret (new CoreAudioSource (s, path, chn, flags));
 118                         if (setup_peakfile (ret)) {
 119                                 return boost::shared_ptr<Source>();
 120                         }
 121                         if (announce) {
 122                                 SourceCreated (ret);
 123                         }
 124                         return ret;
 125                 }
 126
 127                 catch (failed_constructor& err) {
 128
 129                         /* this is allowed to throw */
 130
 131                         boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 132                         if (setup_peakfile (ret)) {
 133                                 return boost::shared_ptr<Source>();
 134                         }
 135                         if (announce) {
 136                                 SourceCreated (ret);
 137                         }
 138                         return ret;
 139                 }
 140
 141         } else {
 142
 143                 boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 144                 if (setup_peakfile (ret)) {
 145                         return boost::shared_ptr<Source>();
 146                 }
 147                 if (announce) {
 148                         SourceCreated (ret);
 149                 }
 150                 return ret;
 151         }
 152
 153         return boost::shared_ptr<Source>();
 154 }
 155
 156 #else
 157
 158 boost::shared_ptr<Source>
 159 SourceFactory::createReadable (Session& s, string path, int chn, AudioFileSource::Flag flags, bool announce)
 160 {
 161         boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 162
 163         if (setup_peakfile (ret)) {
 164                 return boost::shared_ptr<Source>();
 165         }
 166
 167         if (announce) {
 168                 SourceCreated (ret);
 169         }
 170
 171         return ret;
 172 }
 173
 174 #endif // HAVE_COREAUDIO
 175
 176 boost::shared_ptr<Source>
 177 SourceFactory::createWritable (Session& s, std::string path, bool destructive, nframes_t rate, bool announce)
 178 {
 179         /* this might throw failed_constructor(), which is OK */
 180
 181         boost::shared_ptr<Source> ret (new SndFileSource
 182                                        (s, path,
 183                                         Config->get_native_file_data_format(),
 184                                         Config->get_native_file_header_format(),
 185                                         rate,
 186                                         (destructive ? AudioFileSource::Flag (SndFileSource::default_writable_flags | AudioFileSource::Destructive) :
 187                                          SndFileSource::default_writable_flags)));
 188
 189         if (setup_peakfile (ret)) {
 190                 return boost::shared_ptr<Source>();
 191         }
 192         if (announce) {
 193                 SourceCreated (ret);
 194         }
 195         return ret;
 196 }