Logo Search packages:      
Sourcecode: ardour version File versions

source_factory.cc

/*
    Copyright (C) 2000-2006 Paul Davis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id$
*/

#include <glibmm/thread.h>

#include <pbd/error.h>
#include <pbd/convert.h>
#include <pbd/pthread_utils.h>
#include <pbd/stacktrace.h>

#include <ardour/source_factory.h>
#include <ardour/sndfilesource.h>
#include <ardour/silentfilesource.h>
#include <ardour/configuration.h>

#ifdef  HAVE_COREAUDIO
#define USE_COREAUDIO_FOR_FILES
#endif

#ifdef USE_COREAUDIO_FOR_FILES
#include <ardour/coreaudiosource.h>
#endif


#include "i18n.h"

using namespace ARDOUR;
using namespace std;
using namespace PBD;
using namespace sigc;

sigc::signal<void,boost::shared_ptr<Source> > SourceFactory::SourceCreated;
Glib::Cond* SourceFactory::PeaksToBuild;
Glib::StaticMutex SourceFactory::peak_building_lock = GLIBMM_STATIC_MUTEX_INIT;
std::list<boost::weak_ptr<AudioSource> > SourceFactory::files_with_peaks;

static void 
peak_thread_work ()
{
      PBD::ThreadCreated (pthread_self(), string ("peakbuilder-") + to_string (pthread_self(), std::dec));

      while (true) {

            SourceFactory::peak_building_lock.lock ();
            
        wait:
            if (SourceFactory::files_with_peaks.empty()) {
                  SourceFactory::PeaksToBuild->wait (SourceFactory::peak_building_lock);
            }

            if (SourceFactory::files_with_peaks.empty()) {
                  goto wait;
            }

            boost::shared_ptr<AudioSource> as (SourceFactory::files_with_peaks.front().lock());
            SourceFactory::files_with_peaks.pop_front ();
            SourceFactory::peak_building_lock.unlock ();
            
            if (!as) {
                  continue;
            }

            as->setup_peakfile ();
      }
}

void
SourceFactory::init ()
{
      PeaksToBuild = new Glib::Cond();

      for (int n = 0; n < 2; ++n) {
            Glib::Thread::create (sigc::ptr_fun (::peak_thread_work), false);
      }
}

int
SourceFactory::setup_peakfile (boost::shared_ptr<Source> s, bool async)
{
      boost::shared_ptr<AudioSource> as (boost::dynamic_pointer_cast<AudioSource> (s));

      if (as) {

            if (async) {

                  Glib::Mutex::Lock lm (peak_building_lock);
                  files_with_peaks.push_back (boost::weak_ptr<AudioSource> (as));
                  PeaksToBuild->broadcast ();

            } else {

                  if (as->setup_peakfile ()) {
                        error << string_compose("SourceFactory: could not set up peakfile for %1", as->name()) << endmsg;
                        return -1;
                  }
            }
      }

      return 0;
}

boost::shared_ptr<Source>
SourceFactory::createSilent (Session& s, const XMLNode& node, nframes_t nframes, float sr)
{
      boost::shared_ptr<Source> ret (new SilentFileSource (s, node, nframes, sr));
      // no analysis data - the file is non-existent
      SourceCreated (ret);
      return ret;
}

boost::shared_ptr<Source>
SourceFactory::create (Session& s, const XMLNode& node, bool defer_peaks)
{
      try {

            boost::shared_ptr<Source> ret (new SndFileSource (s, node));
            if (setup_peakfile (ret, defer_peaks)) {
                  return boost::shared_ptr<Source>();
            }
            ret->check_for_analysis_data_on_disk ();
            SourceCreated (ret);
            return ret;
      } 


      catch (failed_constructor& err) {   

#ifdef USE_COREAUDIO_FOR_FILES

            /* this is allowed to throw */

            boost::shared_ptr<Source> ret (new CoreAudioSource (s, node));
            if (setup_peakfile (ret, defer_peaks)) {
                  return boost::shared_ptr<Source>();
            }
            ret->check_for_analysis_data_on_disk ();
            SourceCreated (ret);
            return ret;
#else
            throw; // rethrow 
#endif

      }

      return boost::shared_ptr<Source>(); // keep stupid gcc happy
}

boost::shared_ptr<Source>
SourceFactory::createReadable (Session& s, string path, int chn, AudioFileSource::Flag flags, bool announce, bool defer_peaks)
{
      if (!(flags & Destructive)) {

            try {

                  boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));
                  if (setup_peakfile (ret, defer_peaks)) {
                        return boost::shared_ptr<Source>();
                  }
                  ret->check_for_analysis_data_on_disk ();
                  if (announce) {
                        SourceCreated (ret);
                  }
                  return ret;
            }
            
            catch (failed_constructor& err) {

                  /* this is allowed to throw */

#ifdef USE_COREAUDIO_FOR_FILES

                  boost::shared_ptr<Source> ret (new CoreAudioSource (s, path, chn, flags));
                  if (setup_peakfile (ret, defer_peaks)) {
                        return boost::shared_ptr<Source>();
                  }
                  ret->check_for_analysis_data_on_disk ();
                  if (announce) {
                        SourceCreated (ret);
                  }
                  return ret;

#else
                  throw; // rethrow
#endif
            }

      } else {

      }

      return boost::shared_ptr<Source>();
}

boost::shared_ptr<Source>
SourceFactory::createWritable (Session& s, std::string path, bool destructive, nframes_t rate, bool announce, bool defer_peaks)
{
      /* this might throw failed_constructor(), which is OK */

      boost::shared_ptr<Source> ret (new SndFileSource 
                               (s, path, 
                              Config->get_native_file_data_format(),
                              Config->get_native_file_header_format(),
                              rate,
                              (destructive ? AudioFileSource::Flag (SndFileSource::default_writable_flags | AudioFileSource::Destructive) :
                               SndFileSource::default_writable_flags)));      

      if (setup_peakfile (ret, defer_peaks)) {
            return boost::shared_ptr<Source>();
      }

      // no analysis data - this is a new file

      if (announce) {
            SourceCreated (ret);
      }
      return ret;
}

Generated by  Doxygen 1.6.0   Back to index