rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 278 insertions, 0 deletions

diff --git a/libs/ardour/source_factory.cc b/libs/ardour/source_factory.cc
new file mode 100644
index 0000000000..5338997659
--- /dev/null
+++ b/libs/ardour/source_factory.cc
@@ -0,0 +1,278 @@
+/*
+    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 <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>
+#include <ardour/smf_source.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;
+
+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)
+{
+	DataType type = DataType::AUDIO;
+	const XMLProperty* prop = node.property("type");
+
+	if (prop) {
+		type = DataType(prop->value());
+	}
+
+	if (type == DataType::AUDIO) {
+
+		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
+		}
+
+	} else if (type == DataType::MIDI) {
+		boost::shared_ptr<Source> ret (new SMFSource (s, node));
+		ret->check_for_analysis_data_on_disk ();
+		SourceCreated (ret);
+		return ret;
+	}
+
+	return boost::shared_ptr<Source>();
+}
+
+boost::shared_ptr<Source>
+SourceFactory::createReadable (DataType type, Session& s, string path, int chn, AudioFileSource::Flag flags, bool announce, bool defer_peaks)
+{
+	if (type == DataType::AUDIO) {
+
+		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) {
+#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 {
+			// eh?
+		}
+	
+	} else if (type == DataType::MIDI) {
+		
+		// FIXME: flags?
+		boost::shared_ptr<Source> ret (new SMFSource (s, path, SMFSource::Flag(0)));
+		
+		if (announce) {
+			SourceCreated (ret);
+		}
+
+		return ret;
+
+	}
+
+	return boost::shared_ptr<Source>();
+}
+
+boost::shared_ptr<Source>
+SourceFactory::createWritable (DataType type, Session& s, std::string path, bool destructive, nframes_t rate, bool announce, bool defer_peaks)
+{
+	/* this might throw failed_constructor(), which is OK */
+	
+	if (type == DataType::AUDIO) {
+		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;
+
+	} else if (type == DataType::MIDI) {
+
+		boost::shared_ptr<Source> ret (new SMFSource (s, path));
+	
+		// no analysis data - this is a new file
+		
+		if (announce) {
+			SourceCreated (ret);
+		}
+		return ret;
+
+	}
+
+	return boost::shared_ptr<Source> ();
+}