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 <glibmm/thread.h>
  22
  23 #include <pbd/error.h>
  24 #include <pbd/convert.h>
  25 #include <pbd/pthread_utils.h>
  26 #include <pbd/stacktrace.h>
  27
  28 #include <ardour/source_factory.h>
  29 #include <ardour/sndfilesource.h>
  30 #include <ardour/silentfilesource.h>
  31 #include <ardour/configuration.h>
  32
  33 #ifdef  HAVE_COREAUDIO
  34 #define USE_COREAUDIO_FOR_FILES
  35 #endif
  36
  37 #ifdef USE_COREAUDIO_FOR_FILES
  38 #include <ardour/coreaudiosource.h>
  39 #endif
  40
  41
  42 #include "i18n.h"
  43
  44 using namespace ARDOUR;
  45 using namespace std;
  46 using namespace PBD;
  47 using namespace sigc;
  48
  49 sigc::signal<void,boost::shared_ptr<Source> > SourceFactory::SourceCreated;
  50 Glib::Cond* SourceFactory::PeaksToBuild;
  51 Glib::StaticMutex SourceFactory::peak_building_lock = GLIBMM_STATIC_MUTEX_INIT;
  52 std::list<boost::weak_ptr<AudioSource> > SourceFactory::files_with_peaks;
  53
  54 static void
  55 peak_thread_work ()
  56 {
  57         PBD::ThreadCreated (pthread_self(), string ("peakbuilder-") + to_string (pthread_self(), std::dec));
  58
  59         while (true) {
  60
  61                 SourceFactory::peak_building_lock.lock ();
  62
  63           wait:
  64                 if (SourceFactory::files_with_peaks.empty()) {
  65                         SourceFactory::PeaksToBuild->wait (SourceFactory::peak_building_lock);
  66                 }
  67
  68                 if (SourceFactory::files_with_peaks.empty()) {
  69                         goto wait;
  70                 }
  71
  72                 boost::shared_ptr<AudioSource> as (SourceFactory::files_with_peaks.front().lock());
  73                 SourceFactory::files_with_peaks.pop_front ();
  74                 SourceFactory::peak_building_lock.unlock ();
  75
  76                 if (!as) {
  77                         continue;
  78                 }
  79
  80                 as->setup_peakfile ();
  81         }
  82 }
  83
  84 void
  85 SourceFactory::init ()
  86 {
  87         PeaksToBuild = new Glib::Cond();
  88
  89         for (int n = 0; n < 2; ++n) {
  90                 Glib::Thread::create (sigc::ptr_fun (::peak_thread_work), false);
  91         }
  92 }
  93
  94 int
  95 SourceFactory::setup_peakfile (boost::shared_ptr<Source> s, bool async)
  96 {
  97         boost::shared_ptr<AudioSource> as (boost::dynamic_pointer_cast<AudioSource> (s));
  98
  99         if (as) {
 100
 101                 if (async) {
 102
 103                         Glib::Mutex::Lock lm (peak_building_lock);
 104                         files_with_peaks.push_back (boost::weak_ptr<AudioSource> (as));
 105                         PeaksToBuild->broadcast ();
 106
 107                 } else {
 108
 109                         if (as->setup_peakfile ()) {
 110                                 error << string_compose("SourceFactory: could not set up peakfile for %1", as->name()) << endmsg;
 111                                 return -1;
 112                         }
 113                 }
 114         }
 115
 116         return 0;
 117 }
 118
 119 boost::shared_ptr<Source>
 120 SourceFactory::createSilent (Session& s, const XMLNode& node, nframes_t nframes, float sr)
 121 {
 122         boost::shared_ptr<Source> ret (new SilentFileSource (s, node, nframes, sr));
 123         // no analysis data - the file is non-existent
 124         SourceCreated (ret);
 125         return ret;
 126 }
 127
 128 boost::shared_ptr<Source>
 129 SourceFactory::create (Session& s, const XMLNode& node, bool defer_peaks)
 130 {
 131         try {
 132
 133                 boost::shared_ptr<Source> ret (new SndFileSource (s, node));
 134                 if (setup_peakfile (ret, defer_peaks)) {
 135                         return boost::shared_ptr<Source>();
 136                 }
 137                 ret->check_for_analysis_data_on_disk ();
 138                 SourceCreated (ret);
 139                 return ret;
 140         }
 141
 142
 143         catch (failed_constructor& err) {
 144
 145 #ifdef USE_COREAUDIO_FOR_FILES
 146
 147                 /* this is allowed to throw */
 148
 149                 boost::shared_ptr<Source> ret (new CoreAudioSource (s, node));
 150                 if (setup_peakfile (ret, defer_peaks)) {
 151                         return boost::shared_ptr<Source>();
 152                 }
 153                 ret->check_for_analysis_data_on_disk ();
 154                 SourceCreated (ret);
 155                 return ret;
 156 #else
 157                 throw; // rethrow
 158 #endif
 159
 160         }
 161
 162         return boost::shared_ptr<Source>(); // keep stupid gcc happy
 163 }
 164
 165 boost::shared_ptr<Source>
 166 SourceFactory::createReadable (Session& s, string path, int chn, AudioFileSource::Flag flags, bool announce, bool defer_peaks)
 167 {
 168         if (!(flags & Destructive)) {
 169
 170                 try {
 171
 172                         boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
 173                         if (setup_peakfile (ret, defer_peaks)) {
 174                                 return boost::shared_ptr<Source>();
 175                         }
 176                         ret->check_for_analysis_data_on_disk ();
 177                         if (announce) {
 178                                 SourceCreated (ret);
 179                         }
 180                         return ret;
 181                 }
 182
 183                 catch (failed_constructor& err) {
 184
 185                         /* this is allowed to throw */
 186
 187 #ifdef USE_COREAUDIO_FOR_FILES
 188
 189                         boost::shared_ptr<Source> ret (new CoreAudioSource (s, path, chn, flags));
 190                         if (setup_peakfile (ret, defer_peaks)) {
 191                                 return boost::shared_ptr<Source>();
 192                         }
 193                         ret->check_for_analysis_data_on_disk ();
 194                         if (announce) {
 195                                 SourceCreated (ret);
 196                         }
 197                         return ret;
 198
 199 #else
 200                         throw; // rethrow
 201 #endif
 202                 }
 203
 204         } else {
 205
 206         }
 207
 208         return boost::shared_ptr<Source>();
 209 }
 210
 211 boost::shared_ptr<Source>
 212 SourceFactory::createWritable (Session& s, std::string path, bool destructive, nframes_t rate, bool announce, bool defer_peaks)
 213 {
 214         /* this might throw failed_constructor(), which is OK */
 215
 216         boost::shared_ptr<Source> ret (new SndFileSource
 217                                        (s, path,
 218                                         Config->get_native_file_data_format(),
 219                                         Config->get_native_file_header_format(),
 220                                         rate,
 221                                         (destructive ? AudioFileSource::Flag (SndFileSource::default_writable_flags | AudioFileSource::Destructive) :
 222                                          SndFileSource::default_writable_flags)));
 223
 224         if (setup_peakfile (ret, defer_peaks)) {
 225                 return boost::shared_ptr<Source>();
 226         }
 227
 228         // no analysis data - this is a new file
 229
 230         if (announce) {
 231                 SourceCreated (ret);
 232         }
 233         return ret;
 234 }