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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 <pbd/error.h>

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

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

#include "i18n.h"

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

sigc::signal<void,boost::shared_ptr<Source> > SourceFactory::SourceCreated;

int
SourceFactory::setup_peakfile (boost::shared_ptr<Source> s)
{
      boost::shared_ptr<AudioSource> as (boost::dynamic_pointer_cast<AudioSource> (s));
      if (as) {
            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));
      SourceCreated (ret);
      return ret;
}

#ifdef HAVE_COREAUDIO
boost::shared_ptr<Source>
SourceFactory::create (Session& s, const XMLNode& node)
{
      try {
            boost::shared_ptr<Source> ret (new CoreAudioSource (s, node));
            if (setup_peakfile (ret)) {
                  return boost::shared_ptr<Source>();
            }
            SourceCreated (ret);
            return ret;
      } 


      catch (failed_constructor& err) {   

            /* this is allowed to throw */

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

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

#else

boost::shared_ptr<Source>
SourceFactory::create (Session& s, const XMLNode& node)
{
      /* this is allowed to throw */

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

#endif // HAVE_COREAUDIO

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

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

                  /* this is allowed to throw */

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

      } else {

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

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

#else

boost::shared_ptr<Source>
SourceFactory::createReadable (Session& s, string path, int chn, AudioFileSource::Flag flags, bool announce)
{
      boost::shared_ptr<Source> ret (new SndFileSource (s, path, chn, flags));

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

      if (announce) {
            SourceCreated (ret);
      }

      return ret;
}

#endif // HAVE_COREAUDIO

boost::shared_ptr<Source>
SourceFactory::createWritable (Session& s, std::string path, bool destructive, nframes_t rate, bool announce)
{
      /* 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)) {
            return boost::shared_ptr<Source>();
      }
      if (announce) {
            SourceCreated (ret);
      }
      return ret;
}

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