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 #include <pbd/convert.h>
  23 #include <pbd/pthread_utils.h>
  24
  25 #include <ardour/source_factory.h>
  26 #include <ardour/sndfilesource.h>
  27 #include <ardour/silentfilesource.h>
  28 #include <ardour/configuration.h>
  29 #include <ardour/smf_source.h>
  30
  31 #ifdef HAVE_COREAUDIO
  32 #include <ardour/coreaudiosource.h>
  33 #endif
  34
  35 #include "i18n.h"
  36
  37 using namespace ARDOUR;
  38 using namespace std;
  39 using namespace PBD;
  40
  41 sigc::signal<void,boost::shared_ptr<Source> > SourceFactory::SourceCreated;
  42 Glib::Cond* SourceFactory::PeaksToBuild;
  43 Glib::StaticMutex SourceFactory::peak_building_lock = GLIBMM_STATIC_MUTEX_INIT;
  44 std::list<boost::weak_ptr<AudioSource> > SourceFactory::files_with_peaks;
  45
  46 static void
  47 peak_thread_work ()
  48 {
  49         PBD::ThreadCreated (pthread_self(), string ("peakbuilder-") + to_string (pthread_self(), std::dec));
  50
  51         while (true) {
  52
  53                 SourceFactory::peak_building_lock.lock ();
  54
  55           wait:
  56                 if (SourceFactory::files_with_peaks.empty()) {
  57                         SourceFactory::PeaksToBuild->wait (SourceFactory::peak_building_lock);
  58                 }
  59
  60                 if (SourceFactory::files_with_peaks.empty()) {
  61                         goto wait;
  62                 }
  63
  64                 boost::shared_ptr<AudioSource> as (SourceFactory::files_with_peaks.front().lock());
  65                 SourceFactory::files_with_peaks.pop_front ();
  66                 SourceFactory::peak_building_lock.unlock ();
  67
  68                 if (!as) {
  69                         continue;
  70                 }
  71                 as->setup_peakfile ();
  72         }
  73 }
  74
  75 void
  76 SourceFactory::init ()
  77 {
  78         PeaksToBuild = new Glib::Cond();
  79
  80         for (int n = 0; n < 2; ++n) {
  81                 Glib::Thread::create (sigc::ptr_fun (::peak_thread_work), false);
  82         }
  83 }
  84
  85 int
  86 SourceFactory::setup_peakfile (boost::shared_ptr<Source> s, bool async)
  87 {
  88         boost::shared_ptr<AudioSource> as (boost::dynamic_pointer_cast<AudioSource> (s));
  89
  90         if (as) {
  91
  92                 if (async) {
  93
  94                         Glib::Mutex::Lock lm (peak_building_lock);
  95                         files_with_peaks.push_back (boost::weak_ptr<AudioSource> (as));
  96                         PeaksToBuild->broadcast ();
  97
  98                 } else {
  99
 100                         if (as->setup_peakfile ()) {
 101                                 error << string_compose("SourceFactory: could not set up peakfile for %1", as->name()) << endmsg;
 102                                 return -1;
 103                         }
 104                 }
 105         }
 106
 107         return 0;
 108 }
 109
 110 boost::shared_ptr<Source>
 111 SourceFactory::createSilent (Session& s, const XMLNode& node, nframes_t nframes, float sr)
 112 {
 113         boost::shared_ptr<Source> ret (new SilentFileSource (s, node, nframes, sr));
 114         SourceCreated (ret);
 115         return ret;
 116 }
 117
 118 boost::shared_ptr<Source>
 119 SourceFactory::create (Session& s, const XMLNode& node, bool defer_peaks)
 120 {
 121        DataType type = DataType::AUDIO;
 122        const XMLProperty* prop = node.property("type");
 123
 124        if (prop) {
 125                type = DataType(prop->value());
 126        }
 127
 128        if (type == DataType::AUDIO) {
 129
 130 #ifdef HAVE_COREAUDIO
 131
 132                try {
 133                        boost::shared_ptr<Source> ret (new CoreAudioSource (s, node));
 134
 135                        if (setup_peakfile (ret, defer_peaks)) {
 136                                return boost::shared_ptr<Source>();
 137                        }
 138
 139                        SourceCreated (ret);
 140                        return ret;
 141                }
 142
 143
 144                catch (failed_constructor& err) {
 145
 146                        /* this is allowed to throw */
 147
 148                        boost::shared_ptr<Source> ret (new SndFileSource (s, node));
 149
 150                        if (setup_peakfile (ret, defer_peaks)) {
 151                                return boost::shared_ptr<Source>();
 152                        }
 153
 154                        SourceCreated (ret);
 155                        return ret;
 156                }
 157 #else
 158                /* this is allowed to throw */
 159
 160                boost::shared_ptr<Source> ret (new SndFileSource (s, node));
 161
 162                if (setup_peakfile (ret, defer_peaks)) {
 163                        return boost::shared_ptr<Source>();
 164                }
 165
 166                SourceCreated (ret);
 167                return ret;
 168 #endif
 169
 170        } else if (type == DataType::MIDI) {
 171                    boost::shared_ptr<Source> ret (new SMFSource (s, node));
 172
 173                    SourceCreated (ret);
 174                    return ret;
 175        }
 176
 177         return boost::shared_ptr<Source>();
 178 }
 179
 180 boost::shared_ptr<Source>
 181 SourceFactory::createReadable (DataType type, Session& s, string path, int chn, AudioFileSource::Flag flags, bool announce, bool defer_peaks)
 182 {
 183         if (type == DataType::AUDIO) {
 184
 185 #ifdef HAVE_COREAUDIO
 186                 try {
 187                         boost::shared_ptr<Source> ret (new CoreAudioSource (s, path, chn, flags));
 188
 189                         if (setup_peakfile (ret, defer_peaks)) {
 190                                 return boost::shared_ptr<Source>();
 191                         }
 192
 193                         if (announce) {
 194                                 SourceCreated (ret);
 195                         }
 196                         return ret;
 197                 }
 198
 199                 catch (failed_constructor& err) {
 200                         boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 201                         if (setup_peakfile (ret, defer_peaks)) {
 202                                 return boost::shared_ptr<Source>();
 203                         }
 204                         if (announce) {
 205                                 SourceCreated (ret);
 206                         }
 207                         return ret;
 208                 }
 209 #else
 210                 boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 211
 212                 if (setup_peakfile (ret, defer_peaks)) {
 213                         return boost::shared_ptr<Source>();
 214                 }
 215
 216                 if (announce) {
 217                         SourceCreated (ret);
 218                 }
 219
 220                 return ret;
 221 #endif
 222
 223         } else if (type == DataType::MIDI) {
 224
 225                 // FIXME: flags?
 226                 boost::shared_ptr<Source> ret (new SMFSource (s, path, SMFSource::Flag(0)));
 227
 228                 if (announce) {
 229                         SourceCreated (ret);
 230                 }
 231
 232                 return ret;
 233         }
 234
 235         return boost::shared_ptr<Source>();
 236 }
 237
 238 boost::shared_ptr<Source>
 239 SourceFactory::createWritable (DataType type, Session& s, std::string path, bool destructive, nframes_t rate, bool announce, bool defer_peaks)
 240 {
 241         /* this might throw failed_constructor(), which is OK */
 242
 243         if (type == DataType::AUDIO) {
 244                 boost::shared_ptr<Source> ret (new SndFileSource
 245                                                (s, path,
 246                                                 Config->get_native_file_data_format(),
 247                                                 Config->get_native_file_header_format(),
 248                                                 rate,
 249                                                 (destructive ? AudioFileSource::Flag (SndFileSource::default_writable_flags | AudioFileSource::Destructive) :
 250                                                  SndFileSource::default_writable_flags)));
 251
 252                 if (setup_peakfile (ret, defer_peaks)) {
 253                         return boost::shared_ptr<Source>();
 254                 }
 255
 256                 if (announce) {
 257                         SourceCreated (ret);
 258                 }
 259                 return ret;
 260
 261         } else if (type == DataType::MIDI) {
 262
 263                 boost::shared_ptr<Source> ret (new SMFSource (s, path));
 264
 265                 if (announce) {
 266                         SourceCreated (ret);
 267                 }
 268                 return ret;
 269
 270         }
 271
 272         return boost::shared_ptr<Source> ();
 273 }