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;
  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
  72                 as->setup_peakfile ();
  73         }
  74 }
  75
  76 void
  77 SourceFactory::init ()
  78 {
  79         PeaksToBuild = new Glib::Cond();
  80
  81         for (int n = 0; n < 2; ++n) {
  82                 Glib::Thread::create (sigc::ptr_fun (::peak_thread_work), false);
  83         }
  84 }
  85
  86 int
  87 SourceFactory::setup_peakfile (boost::shared_ptr<Source> s, bool async)
  88 {
  89         boost::shared_ptr<AudioSource> as (boost::dynamic_pointer_cast<AudioSource> (s));
  90
  91         if (as) {
  92
  93                 if (async) {
  94
  95                         Glib::Mutex::Lock lm (peak_building_lock);
  96                         files_with_peaks.push_back (boost::weak_ptr<AudioSource> (as));
  97                         PeaksToBuild->broadcast ();
  98
  99                 } else {
 100
 101                         if (as->setup_peakfile ()) {
 102                                 error << string_compose("SourceFactory: could not set up peakfile for %1", as->name()) << endmsg;
 103                                 return -1;
 104                         }
 105                 }
 106         }
 107
 108         return 0;
 109 }
 110
 111 boost::shared_ptr<Source>
 112 SourceFactory::createSilent (Session& s, const XMLNode& node, nframes_t nframes, float sr)
 113 {
 114         boost::shared_ptr<Source> ret (new SilentFileSource (s, node, nframes, sr));
 115         SourceCreated (ret);
 116         return ret;
 117 }
 118
 119 boost::shared_ptr<Source>
 120 SourceFactory::create (Session& s, const XMLNode& node, bool defer_peaks)
 121 {
 122        DataType type = DataType::AUDIO;
 123        const XMLProperty* prop = node.property("type");
 124
 125        if (prop) {
 126                type = DataType(prop->value());
 127        }
 128
 129        if (type == DataType::AUDIO) {
 130
 131 #ifdef HAVE_COREAUDIO
 132
 133                try {
 134                        boost::shared_ptr<Source> ret (new CoreAudioSource (s, node));
 135
 136                        if (setup_peakfile (ret, defer_peaks)) {
 137                                return boost::shared_ptr<Source>();
 138                        }
 139
 140                        SourceCreated (ret);
 141                        return ret;
 142                }
 143
 144
 145                catch (failed_constructor& err) {
 146
 147                        /* this is allowed to throw */
 148
 149                        boost::shared_ptr<Source> ret (new SndFileSource (s, node));
 150
 151                        if (setup_peakfile (ret, defer_peaks)) {
 152                                return boost::shared_ptr<Source>();
 153                        }
 154
 155                        SourceCreated (ret);
 156                        return ret;
 157                }
 158 #else
 159                /* this is allowed to throw */
 160
 161                boost::shared_ptr<Source> ret (new SndFileSource (s, node));
 162
 163                if (setup_peakfile (ret, defer_peaks)) {
 164                        return boost::shared_ptr<Source>();
 165                }
 166
 167                SourceCreated (ret);
 168                return ret;
 169 #endif
 170
 171        } else if (type == DataType::MIDI) {
 172                    boost::shared_ptr<Source> ret (new SMFSource (s, node));
 173
 174                    SourceCreated (ret);
 175                    return ret;
 176        }
 177
 178         return boost::shared_ptr<Source>();
 179 }
 180
 181 boost::shared_ptr<Source>
 182 SourceFactory::createReadable (DataType type, Session& s, string path, int chn, AudioFileSource::Flag flags, bool announce, bool defer_peaks)
 183 {
 184         if (type == DataType::AUDIO) {
 185
 186 #ifdef HAVE_COREAUDIO
 187                 try {
 188                         boost::shared_ptr<Source> ret (new CoreAudioSource (s, path, chn, flags));
 189
 190                         if (setup_peakfile (ret, defer_peaks)) {
 191                                 return boost::shared_ptr<Source>();
 192                         }
 193
 194                         if (announce) {
 195                                 SourceCreated (ret);
 196                         }
 197                         return ret;
 198                 }
 199
 200                 catch (failed_constructor& err) {
 201                         boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 202                         if (setup_peakfile (ret, defer_peaks)) {
 203                                 return boost::shared_ptr<Source>();
 204                         }
 205                         if (announce) {
 206                                 SourceCreated (ret);
 207                         }
 208                         return ret;
 209                 }
 210 #else
 211                 boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 212
 213                 if (setup_peakfile (ret, defer_peaks)) {
 214                         return boost::shared_ptr<Source>();
 215                 }
 216
 217                 if (announce) {
 218                         SourceCreated (ret);
 219                 }
 220
 221                 return ret;
 222 #endif
 223
 224         } else if (type == DataType::MIDI) {
 225
 226                 // FIXME: flags?
 227                 boost::shared_ptr<Source> ret (new SMFSource (s, path, SMFSource::Flag(0)));
 228
 229                 if (announce) {
 230                         SourceCreated (ret);
 231                 }
 232
 233                 return ret;
 234         }
 235
 236         return boost::shared_ptr<Source>();
 237 }
 238
 239 boost::shared_ptr<Source>
 240 SourceFactory::createWritable (DataType type, Session& s, std::string path, bool destructive, nframes_t rate, bool announce, bool defer_peaks)
 241 {
 242         /* this might throw failed_constructor(), which is OK */
 243
 244         if (type == DataType::AUDIO) {
 245                 boost::shared_ptr<Source> ret (new SndFileSource
 246                                                (s, path,
 247                                                 Config->get_native_file_data_format(),
 248                                                 Config->get_native_file_header_format(),
 249                                                 rate,
 250                                                 (destructive ? AudioFileSource::Flag (SndFileSource::default_writable_flags | AudioFileSource::Destructive) :
 251                                                  SndFileSource::default_writable_flags)));
 252
 253                 if (setup_peakfile (ret, false)) {
 254                         return boost::shared_ptr<Source>();
 255                 }
 256
 257                 if (announce) {
 258                         SourceCreated (ret);
 259                 }
 260                 return ret;
 261
 262         } else if (type == DataType::MIDI) {
 263
 264                 boost::shared_ptr<Source> ret (new SMFSource (s, path));
 265
 266                 if (announce) {
 267                         SourceCreated (ret);
 268                 }
 269                 return ret;
 270
 271         }
 272
 273         return boost::shared_ptr<Source> ();
 274 }