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
 173                boost::shared_ptr<Source> ret (new SMFSource (s, node));
 174        }
 175
 176         return boost::shared_ptr<Source>();
 177 }
 178
 179 boost::shared_ptr<Source>
 180 SourceFactory::createReadable (DataType type, Session& s, string path, int chn, AudioFileSource::Flag flags, bool announce, bool defer_peaks)
 181 {
 182         if (type == DataType::AUDIO) {
 183
 184 #ifdef HAVE_COREAUDIO
 185                 try {
 186                         boost::shared_ptr<Source> ret (new CoreAudioSource (s, path, chn, flags));
 187
 188                         if (setup_peakfile (ret, defer_peaks)) {
 189                                 return boost::shared_ptr<Source>();
 190                         }
 191
 192                         if (announce) {
 193                                 SourceCreated (ret);
 194                         }
 195                         return ret;
 196                 }
 197
 198                 catch (failed_constructor& err) {
 199                         boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 200                         if (setup_peakfile (ret, defer_peaks)) {
 201                                 return boost::shared_ptr<Source>();
 202                         }
 203                         if (announce) {
 204                                 SourceCreated (ret);
 205                         }
 206                         return ret;
 207                 }
 208 #else
 209                 boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 210
 211                 if (setup_peakfile (ret, defer_peaks)) {
 212                         return boost::shared_ptr<Source>();
 213                 }
 214
 215                 if (announce) {
 216                         SourceCreated (ret);
 217                 }
 218
 219                 return ret;
 220 #endif
 221
 222         } else if (type == DataType::MIDI) {
 223
 224                 // FIXME: flags?
 225                 boost::shared_ptr<Source> ret (new SMFSource (s, path, SMFSource::Flag(0)));
 226
 227                 if (announce) {
 228                         SourceCreated (ret);
 229                 }
 230
 231                 return ret;
 232         }
 233
 234         return boost::shared_ptr<Source>();
 235 }
 236
 237 boost::shared_ptr<Source>
 238 SourceFactory::createWritable (DataType type, Session& s, std::string path, bool destructive, nframes_t rate, bool announce, bool defer_peaks)
 239 {
 240         /* this might throw failed_constructor(), which is OK */
 241
 242         if (type == DataType::AUDIO) {
 243                 boost::shared_ptr<Source> ret (new SndFileSource
 244                                                (s, path,
 245                                                 Config->get_native_file_data_format(),
 246                                                 Config->get_native_file_header_format(),
 247                                                 rate,
 248                                                 (destructive ? AudioFileSource::Flag (SndFileSource::default_writable_flags | AudioFileSource::Destructive) :
 249                                                  SndFileSource::default_writable_flags)));
 250
 251                 if (setup_peakfile (ret, false)) {
 252                         return boost::shared_ptr<Source>();
 253                 }
 254
 255                 if (announce) {
 256                         SourceCreated (ret);
 257                 }
 258                 return ret;
 259
 260         } else if (type == DataType::MIDI) {
 261
 262                 boost::shared_ptr<Source> ret (new SMFSource (s, path));
 263
 264                 if (announce) {
 265                         SourceCreated (ret);
 266                 }
 267                 return ret;
 268
 269         }
 270
 271         return boost::shared_ptr<Source> ();
 272 }