Merge with 2.0-ongoing R2988

git-svn-id: svn://localhost/ardour2/branches/3.0@2991 d708f5d6-7413-0410-9779-e7cbd77b26cf

39 files changed, 1056 insertions, 270 deletions

diff --git a/libs/ardour/SConscript b/libs/ardour/SConscript
index c407917263..a4ffa4034e 100644
--- a/libs/ardour/SConscript
+++ b/libs/ardour/SConscript
@@ -31,6 +31,7 @@ amp.cc
 audio_buffer.cc
 auto_bundle.cc
 user_bundle.cc
+analyser.cc
 audioanalyser.cc
 audio_diskstream.cc
 audio_library.cc
diff --git a/libs/ardour/analyser.cc b/libs/ardour/analyser.cc
new file mode 100644
index 0000000000..7ddb5428e9
--- /dev/null
+++ b/libs/ardour/analyser.cc
@@ -0,0 +1,119 @@
+/*
+    Copyright (C) 2008 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.
+
+*/
+
+#include <ardour/analyser.h>
+#include <ardour/audiofilesource.h>
+#include <ardour/transient_detector.h>
+
+#include <pbd/pthread_utils.h>
+#include <pbd/convert.h>
+
+using namespace std;
+using namespace sigc;
+using namespace ARDOUR;
+using namespace PBD;
+
+Analyser* Analyser::the_analyser = 0;
+Glib::StaticMutex Analyser::analysis_queue_lock = GLIBMM_STATIC_MUTEX_INIT;
+Glib::Cond* Analyser::SourcesToAnalyse = 0;
+list<boost::weak_ptr<Source> > Analyser::analysis_queue;
+
+Analyser::Analyser ()
+{
+	
+}
+
+Analyser::~Analyser ()
+{
+}
+
+static void
+analyser_work ()
+{
+	Analyser::work ();
+}
+
+void
+Analyser::init ()
+{
+	SourcesToAnalyse = new Glib::Cond();
+	Glib::Thread::create (sigc::ptr_fun (analyser_work), false);
+}
+
+void
+Analyser::queue_source_for_analysis (boost::shared_ptr<Source> src, bool force)
+{
+	if (!src->can_be_analysed()) {
+		return;
+	}
+
+	if (!force && src->has_been_analysed()) {
+		return;
+	}
+
+	Glib::Mutex::Lock lm (analysis_queue_lock);
+	analysis_queue.push_back (boost::weak_ptr<Source>(src));
+	SourcesToAnalyse->broadcast ();
+}
+
+void
+Analyser::work ()
+{
+	PBD::ThreadCreated (pthread_self(), string ("analyser-") + to_string (pthread_self(), std::dec));
+
+	while (true) {
+		analysis_queue_lock.lock ();
+
+	  wait:
+		if (analysis_queue.empty()) {
+			SourcesToAnalyse->wait (analysis_queue_lock);
+		}
+
+		if (analysis_queue.empty()) {
+			goto wait;
+		}
+
+		boost::shared_ptr<Source> src (analysis_queue.front().lock());
+		analysis_queue.pop_front();
+		analysis_queue_lock.unlock ();
+
+		boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (src);
+
+		if (afs) {
+			analyse_audio_file_source (afs);
+		}
+	}
+}
+
+void
+Analyser::analyse_audio_file_source (boost::shared_ptr<AudioFileSource> src)
+{
+	AnalysisFeatureList results;
+
+	TransientDetector td (src->sample_rate());
+
+	if (td.run (src->get_transients_path(), src.get(), 0, results) == 0) {
+		src->set_been_analysed (true);
+	} else {
+		src->set_been_analysed (false);
+	}
+
+}
+
+		
diff --git a/libs/ardour/ardour/analyser.h b/libs/ardour/ardour/analyser.h
new file mode 100644
index 0000000000..8771cab6b0
--- /dev/null
+++ b/libs/ardour/ardour/analyser.h
@@ -0,0 +1,35 @@
+#ifndef __ardour_analyser_h__
+#define __ardour_analyser_h__
+
+#include <glibmm/thread.h>
+#include <boost/shared_ptr.hpp>
+
+namespace ARDOUR {
+
+class AudioFileSource;
+class Source;
+class TransientDetector;
+
+class Analyser {
+
+  public:
+	Analyser();
+	~Analyser ();
+
+	static void init ();
+	static void queue_source_for_analysis (boost::shared_ptr<Source>, bool force);
+	static void work ();
+	
+  private:
+	static Analyser* the_analyser;
+	static Glib::StaticMutex analysis_queue_lock;
+	static Glib::Cond* SourcesToAnalyse;
+	static std::list<boost::weak_ptr<Source> > analysis_queue;
+	
+	static void analyse_audio_file_source (boost::shared_ptr<AudioFileSource>);
+};
+
+
+}
+
+#endif /* __ardour_analyser_h__ */
diff --git a/libs/ardour/ardour/audioanalyser.h b/libs/ardour/ardour/audioanalyser.h
index dbd8a52d5a..06b841990a 100644
--- a/libs/ardour/ardour/audioanalyser.h
+++ b/libs/ardour/ardour/audioanalyser.h
@@ -40,7 +40,7 @@ class AudioAnalyser {
 
 	AudioAnalyser (float sample_rate, AnalysisPluginKey key);
 	virtual ~AudioAnalyser();
-
+	
 	/* analysis object should provide a run method
 	   that accepts a path to write the results to (optionally empty)
 	   a Readable* to read data from
diff --git a/libs/ardour/ardour/audiofilesource.h b/libs/ardour/ardour/audiofilesource.h
index 4d80c8ddf5..0e8b6e4fde 100644
--- a/libs/ardour/ardour/audiofilesource.h
+++ b/libs/ardour/ardour/audiofilesource.h
@@ -125,6 +125,8 @@ class AudioFileSource : public AudioSource {
 
 	virtual void handle_header_position_change () {}
 
+	bool can_be_analysed() const { return _length > 0; } 
+
   protected:
 	
 	/* constructor to be called for existing external-to-session files */
diff --git a/libs/ardour/ardour/audioregion.h b/libs/ardour/ardour/audioregion.h
index 2c5630aec0..3fddfc55b4 100644
--- a/libs/ardour/ardour/audioregion.h
+++ b/libs/ardour/ardour/audioregion.h
@@ -134,7 +134,7 @@ class AudioRegion : public Region
 	void resume_fade_in ();
 	void resume_fade_out ();
 
-	int get_transients (std::vector<nframes64_t>&, bool force_new = false);
+	int get_transients (AnalysisFeatureList&, bool force_new = false);
 
   private:
 	friend class RegionFactory;
@@ -170,6 +170,7 @@ class AudioRegion : public Region
 	void fade_out_changed ();
 	void source_offset_changed ();
 	void listen_to_my_curves ();
+	void listen_to_my_sources ();
 
 	boost::shared_ptr<AutomationList> _fade_in;
 	FadeShape                         _fade_in_shape;
@@ -187,11 +188,6 @@ class AudioRegion : public Region
 	AudioRegion (boost::shared_ptr<const AudioRegion>);
 
 	int set_live_state (const XMLNode&, Change&, bool send);
-
-	std::vector<nframes64_t> _transients;
-	bool valid_transients;
-	void invalidate_transients ();
-	void cleanup_transients (std::vector<nframes64_t>&);
 };
 
 } /* namespace ARDOUR */
diff --git a/libs/ardour/ardour/audiosource.h b/libs/ardour/ardour/audiosource.h
index b11174abe8..1589841baa 100644
--- a/libs/ardour/ardour/audiosource.h
+++ b/libs/ardour/ardour/audiosource.h
@@ -111,14 +111,12 @@ class AudioSource : public Source, public boost::enable_shared_from_this<ARDOUR:
 	int prepare_for_peakfile_writes ();
 	void done_with_peakfile_writes (bool done = true);
 
-	std::vector<nframes64_t> transients;
-	std::string get_transients_path() const;
-
   protected:
 	static bool _build_missing_peakfiles;
 	static bool _build_peakfiles;
 
 	bool                 _peaks_built;
+	bool                 _analysed;
 	mutable Glib::Mutex  _lock;
 	mutable Glib::Mutex  _peaks_ready_lock;
 	Glib::ustring         peakpath;
@@ -145,9 +143,7 @@ class AudioSource : public Source, public boost::enable_shared_from_this<ARDOUR:
 					 double samples_per_visual_peak, nframes_t fpp) const;
 
 	int compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframes_t cnt, bool force, 
-				     bool intermediate_peaks_ready_signal, nframes_t frames_per_peak);
-
-	int load_transients (const std::string&);
+				     bool intermediate_peaks_ready_signal, nframes_t frames_per_peak);	
 
   private:
 	int peakfile;
diff --git a/libs/ardour/ardour/configuration_vars.h b/libs/ardour/ardour/configuration_vars.h
index 99776929a4..134557daeb 100644
--- a/libs/ardour/ardour/configuration_vars.h
+++ b/libs/ardour/ardour/configuration_vars.h
@@ -53,6 +53,7 @@ CONFIG_VARIABLE (float, track_buffer_seconds, "track-buffer-seconds", 5.0)
 CONFIG_VARIABLE (uint32_t, disk_choice_space_threshold,  "disk-choice-space-threshold", 57600000)
 CONFIG_VARIABLE (SampleFormat, native_file_data_format,  "native-file-data-format", ARDOUR::FormatFloat)
 CONFIG_VARIABLE (HeaderFormat, native_file_header_format,  "native-file-header-format", ARDOUR::WAVE)
+CONFIG_VARIABLE (bool, auto_analyse_audio, "auto-analyse-audio", true)
 
 /* OSC */
 
diff --git a/libs/ardour/ardour/playlist.h b/libs/ardour/ardour/playlist.h
index 3f328de005..d8a38841f8 100644
--- a/libs/ardour/ardour/playlist.h
+++ b/libs/ardour/ardour/playlist.h
@@ -96,6 +96,7 @@ class Playlist : public SessionObject, public boost::enable_shared_from_this<Pla
 	void duplicate (boost::shared_ptr<Region>, nframes_t position, float times);
 	void nudge_after (nframes_t start, nframes_t distance, bool forwards);
 	void shuffle (boost::shared_ptr<Region>, int dir);
+	void update_after_tempo_map_change ();
 
 	boost::shared_ptr<Playlist> cut  (list<AudioRange>&, bool result_is_hidden = true);
 	boost::shared_ptr<Playlist> copy (list<AudioRange>&, bool result_is_hidden = true);
@@ -110,6 +111,8 @@ class Playlist : public SessionObject, public boost::enable_shared_from_this<Pla
 	nframes64_t                find_next_region_boundary (nframes64_t frame, int dir);
 	bool                       region_is_shuffle_constrained (boost::shared_ptr<Region>);
 
+	nframes64_t find_next_transient (nframes64_t position, int dir);
+
 	template<class T> void foreach_region (T *t, void (T::*func)(boost::shared_ptr<Region>, void *), void *arg);
 	template<class T> void foreach_region (T *t, void (T::*func)(boost::shared_ptr<Region>));
 
diff --git a/libs/ardour/ardour/region.h b/libs/ardour/ardour/region.h
index da07c580b4..d793e8ca23 100644
--- a/libs/ardour/ardour/region.h
+++ b/libs/ardour/ardour/region.h
@@ -73,6 +73,11 @@ class Region : public Automatable, public boost::enable_shared_from_this<Region>
 		range_guarantoor = USHRT_MAX
 	};
 
+	enum PositionLockStyle {
+		AudioTime,
+		MusicTime
+	};
+
  	static const Flag DefaultFlags = Flag (Opaque|DefaultFadeIn|DefaultFadeOut|FadeIn|FadeOut);
 
 	static Change FadeChanged;
@@ -130,6 +135,9 @@ class Region : public Automatable, public boost::enable_shared_from_this<Region>
 	bool captured()   const { return !(_flags & (Region::Flag (Region::Import|Region::External))); }
 	bool can_move()   const { return !(_flags & (Locked|PositionLocked)); }
 
+	PositionLockStyle positional_lock_style() const { return _positional_lock_style; }
+	void set_position_lock_style (PositionLockStyle ps);
+
 	virtual bool should_save_state () const { return !(_flags & DoNotSaveState); };
 
 	void freeze ();
@@ -156,6 +164,7 @@ class Region : public Automatable, public boost::enable_shared_from_this<Region>
 	void set_position (nframes_t, void *src);
 	void set_position_on_top (nframes_t, void *src);
 	void special_set_position (nframes_t);
+	void update_position_after_tempo_map_change ();
 	void nudge_position (nframes64_t, void *src);
 
 	bool at_natural_position () const;
@@ -213,6 +222,13 @@ class Region : public Automatable, public boost::enable_shared_from_this<Region>
 	virtual bool is_dependent() const { return false; }
 	virtual bool depends_on (boost::shared_ptr<Region> other) const { return false; }
 
+	virtual int get_transients (AnalysisFeatureList&, bool force_new = false) { 
+		// no transients, but its OK
+		return 0;
+	}
+
+	void invalidate_transients ();	
+
   protected:
 	friend class RegionFactory;
 
@@ -226,8 +242,6 @@ class Region : public Automatable, public boost::enable_shared_from_this<Region>
 	Region (boost::shared_ptr<Source> src, const XMLNode&);
 	Region (const SourceList& srcs, const XMLNode&);
 
-	/* this one is for derived types of derived types */
-
 	Region (Session& s, nframes_t start, nframes_t length, const string& name, DataType, layer_t = 0, Flag flags = DefaultFlags);
 
   protected:
@@ -236,6 +250,7 @@ class Region : public Automatable, public boost::enable_shared_from_this<Region>
 	void send_change (Change);
 
 	void trim_to_internal (nframes_t position, nframes_t length, void *src);
+	void set_position_internal (nframes_t pos, bool allow_bbt_recompute);
 
 	bool copied() const { return _flags & Copied; }
 	void maybe_uncopy ();
@@ -256,6 +271,7 @@ class Region : public Automatable, public boost::enable_shared_from_this<Region>
 	nframes_t               _last_length;
 	nframes_t               _position;
 	nframes_t               _last_position;
+	PositionLockStyle       _positional_lock_style;
 	nframes_t               _sync_position;
 	layer_t                 _layer;
 	mutable RegionEditState _first_edit;
@@ -264,6 +280,9 @@ class Region : public Automatable, public boost::enable_shared_from_this<Region>
 	nframes64_t             _ancestral_length;
 	float                   _stretch;
 	float                   _shift;
+	BBT_Time                _bbt_time;
+	AnalysisFeatureList     _transients;
+	bool                    _valid_transients;
 	mutable uint32_t        _read_data_count;  ///< modified in read()
 	Change                  _pending_changed;
 	uint64_t                _last_layer_op;  ///< timestamp
diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index d27df2f7ea..c0c178eb02 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -389,7 +389,10 @@ class Session : public PBD::StatefulDestructible
 	nframes_t get_maximum_extent () const;
 	nframes_t current_end_frame() const { return end_location->start(); }
 	nframes_t current_start_frame() const { return start_location->start(); }
+	// "actual" sample rate of session, set by current audioengine rate, pullup/down etc.
 	nframes_t frame_rate() const   { return _current_frame_rate; }
+	// "native" sample rate of session, regardless of current audioengine rate, pullup/down etc
+	nframes_t nominal_frame_rate() const   { return _nominal_frame_rate; }
 	nframes_t frames_per_hour() const { return _frames_per_hour; }
 
 	double frames_per_smpte_frame() const { return _frames_per_smpte_frame; }
@@ -432,6 +435,9 @@ class Session : public PBD::StatefulDestructible
 	
 	sigc::signal<void,string> StateSaved;
 	sigc::signal<void> StateReady;
+	
+	vector<string*>* possible_states() const;
+	static vector<string*>* possible_states(string path);
 
 	XMLNode& get_state();
 	int      set_state(const XMLNode& node); // not idempotent
@@ -624,6 +630,12 @@ class Session : public PBD::StatefulDestructible
 	
 	sigc::signal<int,boost::shared_ptr<ARDOUR::Playlist> > AskAboutPlaylistDeletion;
 
+	/* handlers should return 0 for "ignore the rate mismatch"
+	   and !0 for "do not use this session"
+	*/
+
+	static sigc::signal<int,nframes_t, nframes_t> AskAboutSampleRateMismatch;
+
 	/* handlers should return !0 for use pending state, 0 for
 	   ignore it.
 	*/
@@ -981,6 +993,7 @@ class Session : public PBD::StatefulDestructible
 	bool                     waiting_for_sync_offset;
 	nframes_t               _base_frame_rate;
 	nframes_t               _current_frame_rate;  //this includes video pullup offset
+	nframes_t               _nominal_frame_rate;  //ignores audioengine setting, "native" SR
 	int                      transport_sub_state;
 	mutable gint            _record_status;
 	volatile nframes_t      _transport_frame;
diff --git a/libs/ardour/ardour/silentfilesource.h b/libs/ardour/ardour/silentfilesource.h
index e0103185c2..87065c1cd0 100644
--- a/libs/ardour/ardour/silentfilesource.h
+++ b/libs/ardour/ardour/silentfilesource.h
@@ -35,6 +35,7 @@ class SilentFileSource : public AudioFileSource {
 	void set_length (nframes_t len);
 	
 	bool destructive() const { return false; }
+	bool can_be_analysed() const { return false; } 
 
   protected:
 
diff --git a/libs/ardour/ardour/source.h b/libs/ardour/ardour/source.h
index 174e58c61b..3109cb00ff 100644
--- a/libs/ardour/ardour/source.h
+++ b/libs/ardour/ardour/source.h
@@ -78,14 +78,27 @@ class Source : public SessionObject, public ARDOUR::Readable
 	static sigc::signal<void,Source*>             SourceCreated;
 	sigc::signal<void,boost::shared_ptr<Source> > Switched;
 
+	bool has_been_analysed() const;
+	virtual bool can_be_analysed() const { return false; } 
+	virtual void set_been_analysed (bool yn);
+	virtual bool check_for_analysis_data_on_disk();
+
+	sigc::signal<void> AnalysisChanged;
+	
+	AnalysisFeatureList transients;
+	std::string get_transients_path() const;
+	int load_transients (const std::string&);
+
   protected:
 	void update_length (nframes_t pos, nframes_t cnt);
 	
-	DataType  _type;
-	time_t    _timestamp;
-	nframes_t _length;
-
-	Glib::Mutex playlist_lock;
+	DataType            _type;
+	time_t              _timestamp;
+	nframes_t           _length;
+	bool                _analysed;
+	mutable Glib::Mutex _analysis_lock;
+	Glib::Mutex         _playlist_lock;
+	
 	typedef std::map<boost::shared_ptr<ARDOUR::Playlist>, uint32_t > PlaylistMap;
 	PlaylistMap _playlists;
 
diff --git a/libs/ardour/ardour/tempo.h b/libs/ardour/ardour/tempo.h
index dc49f5cdef..c4915072c5 100644
--- a/libs/ardour/ardour/tempo.h
+++ b/libs/ardour/ardour/tempo.h
@@ -279,6 +279,10 @@ class TempoMap : public PBD::StatefulDestructible
         void bbt_time_with_metric (nframes_t, BBT_Time&, const Metric&) const;
 
 	void change_existing_tempo_at (nframes_t, double bpm, double note_type);
+	void change_initial_tempo (double bpm, double note_type);
+
+	int n_tempos () const;
+	int n_meters () const;
 
 	sigc::signal<void,ARDOUR::Change> StateChanged;
 
@@ -286,12 +290,12 @@ class TempoMap : public PBD::StatefulDestructible
 	static Tempo    _default_tempo;
 	static Meter    _default_meter;
 
-	Metrics            *metrics;
-	nframes_t     _frame_rate;
-	nframes_t      last_bbt_when;
-	bool                last_bbt_valid;
-	BBT_Time            last_bbt;
-	mutable Glib::RWLock    lock;
+	Metrics*             metrics;
+	nframes_t           _frame_rate;
+	nframes_t            last_bbt_when;
+	bool                 last_bbt_valid;
+	BBT_Time             last_bbt;
+	mutable Glib::RWLock lock;
 	
 	void timestamp_metrics (bool use_bbt);
 
diff --git a/libs/ardour/ardour/transient_detector.h b/libs/ardour/ardour/transient_detector.h
index c65bae3ed5..259b79176f 100644
--- a/libs/ardour/ardour/transient_detector.h
+++ b/libs/ardour/ardour/transient_detector.h
@@ -34,17 +34,23 @@ class TransientDetector : public AudioAnalyser
     TransientDetector (float sample_rate);
     ~TransientDetector();
 
+    static std::string operational_identifier();
+
     void set_threshold (float);
     void set_sensitivity (float);
 
     float get_threshold () const;
     float get_sensitivity () const;
     
-    int run (const std::string& path, Readable*, uint32_t channel, std::vector<nframes64_t>& results);
+    int run (const std::string& path, Readable*, uint32_t channel, AnalysisFeatureList& results);
 
- protected:
-    std::vector<nframes64_t>* current_results;
+    static void cleanup_transients (AnalysisFeatureList&, float sr, float gap_msecs);
+    
+  protected:
+    AnalysisFeatureList* current_results;
     int use_features (Vamp::Plugin::FeatureSet&, std::ostream*);
+
+    static std::string _op_id;
 };
 
 } /* namespace */
diff --git a/libs/ardour/ardour/types.h b/libs/ardour/ardour/types.h
index cc756b0ec6..fdf8d0b439 100644
--- a/libs/ardour/ardour/types.h
+++ b/libs/ardour/ardour/types.h
@@ -392,6 +392,8 @@ namespace ARDOUR {
 	    int   opts; // really RubberBandStretcher::Options
 	};
 
+	typedef std::list<nframes64_t> AnalysisFeatureList;
+
 } // namespace ARDOUR
 
 std::istream& operator>>(std::istream& o, ARDOUR::SampleFormat& sf);
diff --git a/libs/ardour/audio_buffer.cc b/libs/ardour/audio_buffer.cc
index 8444304832..915fdeb948 100644
--- a/libs/ardour/audio_buffer.cc
+++ b/libs/ardour/audio_buffer.cc
@@ -17,6 +17,10 @@
 */
 
 #include <ardour/audio_buffer.h>
+#include <pbd/error.h>
+#include <errno.h>
+
+#include "i18n.h"
 
 #ifdef __x86_64__
 static const int CPU_CACHE_ALIGN = 64;
@@ -24,6 +28,8 @@ static const int CPU_CACHE_ALIGN = 64;
 static const int CPU_CACHE_ALIGN = 16; /* arguably 32 on most arches, but it matters less */
 #endif
 
+using namespace PBD;
+
 namespace ARDOUR {
 
 
@@ -63,7 +69,10 @@ AudioBuffer::resize (size_t size)
 #ifdef NO_POSIX_MEMALIGN
 	_data =  (Sample *) malloc(sizeof(Sample) * _capacity);
 #else
-	posix_memalign((void**)&_data, CPU_CACHE_ALIGN, sizeof(Sample) * _capacity);
+	if (posix_memalign((void**)&_data, CPU_CACHE_ALIGN, sizeof(Sample) * _capacity)) {
+		fatal << string_compose (_("Memory allocation error: posix_memalign (%1 * %2) failed (%3)"),
+				CPU_CACHE_ALIGN, sizeof (Sample) * _capacity, strerror (errno)) << endmsg;
+	}
 #endif	
 	
 	_owns_data = true;
diff --git a/libs/ardour/audio_diskstream.cc b/libs/ardour/audio_diskstream.cc
index d65183a84f..71ff814900 100644
--- a/libs/ardour/audio_diskstream.cc
+++ b/libs/ardour/audio_diskstream.cc
@@ -39,6 +39,7 @@
 
 #include <ardour/ardour.h>
 #include <ardour/audioengine.h>
+#include <ardour/analyser.h>
 #include <ardour/audio_diskstream.h>
 #include <ardour/utils.h>
 #include <ardour/configuration.h>
@@ -1569,6 +1570,7 @@ AudioDiskstream::transport_stopped (struct tm& when, time_t twhen, bool abort_ca
 			s->update_header (capture_info.front()->start, when, twhen);
 			s->set_captured_for (_name);
 			s->mark_immutable ();
+			Analyser::queue_source_for_analysis (s, true);
 		}
 	}
 
diff --git a/libs/ardour/audioanalyser.cc b/libs/ardour/audioanalyser.cc
index 4cc99a5d5e..9da404e5bf 100644
--- a/libs/ardour/audioanalyser.cc
+++ b/libs/ardour/audioanalyser.cc
@@ -18,13 +18,19 @@ using namespace ARDOUR;
 
 AudioAnalyser::AudioAnalyser (float sr, AnalysisPluginKey key)
 	: sample_rate (sr)
-	, plugin (0)
 	, plugin_key (key)
 {
+	/* create VAMP plugin and initialize */
+	
+	if (initialize_plugin (plugin_key, sample_rate)) {
+		error << string_compose (_("cannot load VAMP plugin \"%1\""), key) << endmsg;
+		throw failed_constructor();
+	} 
 }
 
 AudioAnalyser::~AudioAnalyser ()
 {
+	delete plugin;
 }
 
 int
@@ -73,29 +79,28 @@ int
 AudioAnalyser::analyse (const string& path, Readable* src, uint32_t channel)
 {
 	ofstream ofile;
-	Plugin::FeatureSet onsets;
+	Plugin::FeatureSet features;
 	int ret = -1;
 	bool done = false;
 	Sample* data = 0;
 	nframes64_t len = src->readable_length();
 	nframes64_t pos = 0;
 	float* bufs[1] = { 0 };
+	string tmp_path;
 
 	if (!path.empty()) {
-		ofile.open (path.c_str());
+
+		/* store data in tmp file, not the real one */
+		
+		tmp_path = path;
+		tmp_path += ".tmp";
+
+		ofile.open (tmp_path.c_str());
 		if (!ofile) {
 			goto out;
 		}
 	}
 
-	/* create VAMP percussion onset plugin and initialize */
-	
-	if (plugin == 0) {
-		if (initialize_plugin (plugin_key, sample_rate)) {
-			goto out;
-		} 
-	} 
-
 	data = new Sample[bufsize];
 	bufs[0] = data;
 
@@ -108,7 +113,6 @@ AudioAnalyser::analyse (const string& path, Readable* src, uint32_t channel)
 		to_read = min ((len - pos), bufsize);
 		
 		if (src->read (data, pos, to_read, channel) != to_read) {
-			cerr << "bad read\n";
 			goto out;
 		}
 
@@ -118,14 +122,14 @@ AudioAnalyser::analyse (const string& path, Readable* src, uint32_t channel)
 			memset (data + to_read, 0, (bufsize - to_read));
 		}
 		
-		onsets = plugin->process (bufs, RealTime::fromSeconds ((double) pos / sample_rate));
+		features = plugin->process (bufs, RealTime::fromSeconds ((double) pos / sample_rate));
 
-		if (use_features (onsets, (path.empty() ? &ofile : 0))) {
+		if (use_features (features, (path.empty() ? 0 : &ofile))) {
 			goto out;
 		}
 
 		pos += stepsize;
-		
+
 		if (pos >= len) {
 			done = true;
 		}
@@ -133,9 +137,9 @@ AudioAnalyser::analyse (const string& path, Readable* src, uint32_t channel)
 
 	/* finish up VAMP plugin */
 
-	onsets = plugin->getRemainingFeatures ();
+	features = plugin->getRemainingFeatures ();
 
-	if (use_features (onsets, (path.empty() ? &ofile : 0))) {
+	if (use_features (features, (path.empty() ? &ofile : 0))) {
 		goto out;
 	}
 
@@ -146,10 +150,14 @@ AudioAnalyser::analyse (const string& path, Readable* src, uint32_t channel)
 	ofile.close ();
 
 	if (ret) {
-		g_remove (path.c_str());
+		g_remove (tmp_path.c_str());
+	} else if (!path.empty()) {
+		/* move the data file to the requested path */
+		g_rename (tmp_path.c_str(), path.c_str());
 	}
+
 	if (data) {
-		delete data;
+		delete [] data;
 	}
 
 	return ret;
diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc
index 69502f9922..da4f8a642c 100644
--- a/libs/ardour/audioengine.cc
+++ b/libs/ardour/audioengine.cc
@@ -857,13 +857,16 @@ void
 AudioEngine::halted (void *arg)
 {
 	AudioEngine* ae = static_cast<AudioEngine *> (arg);
+	bool was_running = ae->_running;
 
 	ae->_running = false;
 	ae->_buffer_size = 0;
 	ae->_frame_rate = 0;
 	ae->_jack = 0;
 
-	ae->Halted(); /* EMIT SIGNAL */
+	if (was_running) {
+		ae->Halted(); /* EMIT SIGNAL */
+	}
 }
 
 uint32_t
diff --git a/libs/ardour/audioregion.cc b/libs/ardour/audioregion.cc
index 822fe2cb72..20115ff944 100644
--- a/libs/ardour/audioregion.cc
+++ b/libs/ardour/audioregion.cc
@@ -66,12 +66,12 @@ void
 AudioRegion::init ()
 {
 	_scale_amplitude = 1.0;
-	valid_transients = false;
 
 	set_default_fades ();
 	set_default_envelope ();
 
 	listen_to_my_curves ();
+	listen_to_my_sources ();
 }
 
 /* constructor for use by derived types only */
@@ -122,6 +122,7 @@ AudioRegion::AudioRegion (const SourceList& srcs, nframes_t start, nframes_t len
 	, _envelope (new AutomationList(Parameter(EnvelopeAutomation), 0.0, 2.0, 1.0))
 {
 	init ();
+	listen_to_my_sources ();
 }
 
 /** Create a new AudioRegion, that is part of an existing one */
@@ -172,9 +173,9 @@ AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other, nframes_t
 	}
 
 	_scale_amplitude = other->_scale_amplitude;
-	valid_transients = false;
 
 	assert(_type == DataType::AUDIO);
+	listen_to_my_sources ();
 }
 
 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other)
@@ -183,15 +184,14 @@ AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other)
 	, _fade_out (new AutomationList(Parameter(FadeOutAutomation), 0.0, 2.0, 1.0))
 	, _envelope (new AutomationList(Parameter(EnvelopeAutomation), 0.0, 2.0, 1.0))
 {
+	assert(_type == DataType::AUDIO);
 	_scale_amplitude = other->_scale_amplitude;
-	valid_transients = false;
 	_envelope = other->_envelope;
 
 	set_default_fades ();
 	
 	listen_to_my_curves ();
-
-	assert(_type == DataType::AUDIO);
+	listen_to_my_sources ();
 }
 
 AudioRegion::AudioRegion (boost::shared_ptr<AudioSource> src, const XMLNode& node)
@@ -206,13 +206,13 @@ AudioRegion::AudioRegion (boost::shared_ptr<AudioSource> src, const XMLNode& nod
 	}
 
 	init ();
-	valid_transients = false;
 
 	if (set_state (node)) {
 		throw failed_constructor();
 	}
 
 	assert(_type == DataType::AUDIO);
+	listen_to_my_sources ();
 }
 
 AudioRegion::AudioRegion (SourceList& srcs, const XMLNode& node)
@@ -228,6 +228,7 @@ AudioRegion::AudioRegion (SourceList& srcs, const XMLNode& node)
 	}
 
 	assert(_type == DataType::AUDIO);
+	listen_to_my_sources ();
 }
 
 AudioRegion::~AudioRegion ()
@@ -235,10 +236,11 @@ AudioRegion::~AudioRegion ()
 }
 
 void
-AudioRegion::invalidate_transients ()
+AudioRegion::listen_to_my_sources ()
 {
-	valid_transients = false;
-	_transients.clear ();
+	for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
+		(*i)->AnalysisChanged.connect (mem_fun (*this, &AudioRegion::invalidate_transients));
+	}
 }
 
 void
@@ -1256,53 +1258,73 @@ AudioRegion::audio_source (uint32_t n) const
 	return boost::dynamic_pointer_cast<AudioSource>(source(n));
 }
 
-void
-AudioRegion::cleanup_transients (vector<nframes64_t>& t)
-{
-	sort (t.begin(), t.end());
-	
-	/* remove duplicates or other things that are too close */
-	
-	vector<nframes64_t>::iterator i = t.begin();
-	nframes64_t curr = (*i);
-	
-	/* XXX force a 3msec gap - use a config variable */
-	
-	nframes64_t gap_frames = (nframes64_t) floor (3.0 * (playlist()->session().frame_rate() / 1000.0));
-	
-	++i;
-	
-	while (i != t.end()) {
-		if (((*i) == curr) || (((*i) - curr) < gap_frames)) {
-				    i = t.erase (i);
-		} else {
-			++i;
-			curr = *i;
-		}
-	}
-}
-
 int
-AudioRegion::get_transients (vector<nframes64_t>& results, bool force_new)
+AudioRegion::get_transients (AnalysisFeatureList& results, bool force_new)
 {
-	if (!playlist()) {
+	boost::shared_ptr<Playlist> pl = playlist();
+
+	if (!pl) {
 		return -1;
 	}
 
-	if (valid_transients && !force_new) {
+	if (_valid_transients && !force_new) {
 		results = _transients;
 		return 0;
 	}
 
-	TransientDetector t (playlist()->session().frame_rate());
+	SourceList::iterator s;
+	
+	for (s = _sources.begin() ; s != _sources.end(); ++s) {
+		if (!(*s)->has_been_analysed()) {
+			cerr << "For " << name() << " source " << (*s)->name() << " has not been analyzed\n";
+			break;
+		}
+	}
+	
+	if (s == _sources.end()) {
+		/* all sources are analyzed, merge data from each one */
+
+		for (s = _sources.begin() ; s != _sources.end(); ++s) {
+
+			/* find the set of transients within the bounds of this region */
+
+			AnalysisFeatureList::iterator low = lower_bound ((*s)->transients.begin(),
+									 (*s)->transients.end(),
+									 _start);
+
+			AnalysisFeatureList::iterator high = upper_bound ((*s)->transients.begin(),
+									  (*s)->transients.end(),
+									  _start + _length);
+									 
+			/* and add them */
+
+			results.insert (results.end(), low, high);
+		}
+
+		TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
+		
+		/* translate all transients to current position */
+
+		for (AnalysisFeatureList::iterator x = results.begin(); x != results.end(); ++x) {
+			(*x) -= _start;
+			(*x) += _position;
+		}
+
+		_transients = results;
+		_valid_transients = true;
+
+		return 0;
+	}
+
+	TransientDetector t (pl->session().frame_rate());
 	bool existing_results = !results.empty();
 
 	_transients.clear ();
-	valid_transients = false;
+	_valid_transients = false;
 
 	for (uint32_t i = 0; i < n_channels(); ++i) {
 
-		vector<nframes64_t> these_results;
+		AnalysisFeatureList these_results;
 
 		t.reset ();
 
@@ -1312,7 +1334,7 @@ AudioRegion::get_transients (vector<nframes64_t>& results, bool force_new)
 
 		/* translate all transients to give absolute position */
 		
-		for (vector<nframes64_t>::iterator i = these_results.begin(); i != these_results.end(); ++i) {
+		for (AnalysisFeatureList::iterator i = these_results.begin(); i != these_results.end(); ++i) {
 			(*i) += _position;
 		}
 
@@ -1329,20 +1351,19 @@ AudioRegion::get_transients (vector<nframes64_t>& results, bool force_new)
 			*/
 
 			results.insert (results.end(), _transients.begin(), _transients.end());
-			cleanup_transients (results);
+			TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
 		}
 
 		/* make sure ours are clean too */
 
-		cleanup_transients (_transients);
+		TransientDetector::cleanup_transients (_transients, pl->session().frame_rate(), 3.0);
 	}
 
-	valid_transients = true;
+	_valid_transients = true;
 
 	return 0;
 }
 
-
 extern "C" {
 
 	int region_read_peaks_from_c (void *arg, uint32_t npeaks, uint32_t start, uint32_t cnt, intptr_t data, uint32_t n_chan, double samples_per_unit) 
diff --git a/libs/ardour/audiosource.cc b/libs/ardour/audiosource.cc
index 80116988d5..cd71dd21e4 100644
--- a/libs/ardour/audiosource.cc
+++ b/libs/ardour/audiosource.cc
@@ -919,50 +919,3 @@ AudioSource::update_length (nframes_t pos, nframes_t cnt)
 	}
 }
 
-int
-AudioSource::load_transients (const string& path)
-{
-	ifstream file (path.c_str());
-
-	if (!file) {
-		return -1;
-	}
-	
-	transients.clear ();
-
-	stringstream strstr;
-	double val;
-
-	while (file.good()) {
-		file >> val;
-
-		if (!file.fail()) {
-			nframes64_t frame = (nframes64_t) floor (val * _session.frame_rate());
-			transients.push_back (frame);
-		}
-	}
-
-	return 0;
-}
-
-string 
-AudioSource::get_transients_path () const
-{
-	vector<string> parts;
-	string s;
-
-	/* old sessions may not have the analysis directory */
-	
-	_session.ensure_subdirs ();
-
-	s = _session.analysis_dir ();
-	parts.push_back (s);
-
-	s = _id.to_s();
-	s += '.';
-	s += X_("transients");
-	parts.push_back (s);
-	
-	return Glib::build_filename (parts);
-}
-
diff --git a/libs/ardour/enums.cc b/libs/ardour/enums.cc
index 9f2ce4fab9..d64d3a2f99 100644
--- a/libs/ardour/enums.cc
+++ b/libs/ardour/enums.cc
@@ -82,6 +82,7 @@ setup_enum_writer ()
 	Location::Flags _Location_Flags;
 	RouteGroup::Flag _RouteGroup_Flag;
 	Region::Flag _Region_Flag;
+	Region::PositionLockStyle _Region_PositionLockStyle;
 	Track::FreezeState _Track_FreezeState;
 	AutomationList::InterpolationStyle _AutomationList_InterpolationStyle;
 
@@ -364,6 +365,10 @@ setup_enum_writer ()
 	REGISTER_CLASS_ENUM (Region, DoNotSaveState);
 	REGISTER_BITS (_Region_Flag);
 
+	REGISTER_CLASS_ENUM (Region, AudioTime);
+	REGISTER_CLASS_ENUM (Region, MusicTime);
+	REGISTER_BITS (_Region_PositionLockStyle);
+
 	REGISTER_CLASS_ENUM (Track, NoFreeze);
 	REGISTER_CLASS_ENUM (Track, Frozen);
 	REGISTER_CLASS_ENUM (Track, UnFrozen);
diff --git a/libs/ardour/globals.cc b/libs/ardour/globals.cc
index 6bb21a419c..6aba688cae 100644
--- a/libs/ardour/globals.cc
+++ b/libs/ardour/globals.cc
@@ -43,6 +43,7 @@
 #include <midi++/mmc.h>
 
 #include <ardour/ardour.h>
+#include <ardour/analyser.h>
 #include <ardour/audio_library.h>
 #include <ardour/configuration.h>
 #include <ardour/profile.h>
@@ -300,6 +301,7 @@ ARDOUR::init (bool use_vst, bool try_optimization)
 	setup_hardware_optimization (try_optimization);
 
 	SourceFactory::init ();
+	Analyser::init ();
 
 	/* singleton - first object is "it" */
 	new PluginManager ();
diff --git a/libs/ardour/playlist.cc b/libs/ardour/playlist.cc
index 04649a56fe..da3a812123 100644
--- a/libs/ardour/playlist.cc
+++ b/libs/ardour/playlist.cc
@@ -37,6 +37,7 @@
 #include <ardour/region.h>
 #include <ardour/region_factory.h>
 #include <ardour/playlist_factory.h>
+#include <ardour/transient_detector.h>
 
 #include "i18n.h"
 
@@ -1428,6 +1429,65 @@ Playlist::regions_touched (nframes_t start, nframes_t end)
 	return rlist;
 }
 
+nframes64_t
+Playlist::find_next_transient (nframes64_t from, int dir)
+{
+	RegionLock rlock (this);
+	AnalysisFeatureList points;
+	AnalysisFeatureList these_points;
+
+	for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
+		if (dir > 0) {
+			if ((*i)->last_frame() < from) {
+				continue;
+			}
+		} else {
+			if ((*i)->first_frame() > from) {
+				continue;
+			}
+		}
+
+		(*i)->get_transients (these_points);
+
+		/* add first frame, just, err, because */
+		
+		these_points.push_back ((*i)->first_frame());
+		
+		points.insert (points.end(), these_points.begin(), these_points.end());
+		these_points.clear ();
+	}
+	
+	if (points.empty()) {
+		return -1;
+	}
+
+	TransientDetector::cleanup_transients (points, _session.frame_rate(), 3.0);
+	bool reached = false;
+	
+	if (dir > 0) {
+		for (AnalysisFeatureList::iterator x = points.begin(); x != points.end(); ++x) {
+			if ((*x) >= from) {
+				reached = true;
+			}
+			
+			if (reached && (*x) > from) {
+				return *x;
+			}
+		}
+	} else {
+		for (AnalysisFeatureList::reverse_iterator x = points.rbegin(); x != points.rend(); ++x) {
+			if ((*x) <= from) {
+				reached = true;
+			}
+			
+			if (reached && (*x) < from) {
+				return *x;
+			}
+		}
+	}
+
+	return -1;
+}
 
 boost::shared_ptr<Region>
 Playlist::find_next_region (nframes_t frame, RegionPoint point, int dir)
@@ -2259,3 +2319,18 @@ Playlist::region_is_shuffle_constrained (boost::shared_ptr<Region>)
 
 	return false;
 }
+
+void
+Playlist::update_after_tempo_map_change ()
+{
+	RegionLock rlock (const_cast<Playlist*> (this));
+	RegionList copy (regions);
+
+	freeze ();
+	
+	for (RegionList::iterator i = copy.begin(); i != copy.end(); ++i) {	
+		(*i)->update_position_after_tempo_map_change ();
+	}
+
+	thaw ();
+}
diff --git a/libs/ardour/recent_sessions.cc b/libs/ardour/recent_sessions.cc
index cfb8d5bf2e..ebc5499f89 100644
--- a/libs/ardour/recent_sessions.cc
+++ b/libs/ardour/recent_sessions.cc
@@ -75,14 +75,9 @@ ARDOUR::read_recent_sessions (RecentSessions& rs)
 			break;
 		}
 
-		if (!access(newpair.second.c_str(), R_OK)) {
-			rs.push_back (newpair);
-		}
+		rs.push_back (newpair);
 	}
 
-	// This deletes any missing sessions
-	ARDOUR::write_recent_sessions (rs);
-
 	/* display sorting should be done in the GUI, otherwise the
 	 * natural order will be broken
 	 */
diff --git a/libs/ardour/region.cc b/libs/ardour/region.cc
index 054e85cd2f..2193a69908 100644
--- a/libs/ardour/region.cc
+++ b/libs/ardour/region.cc
@@ -21,6 +21,7 @@
 #include <cmath>
 #include <climits>
 #include <algorithm>
+#include <sstream>
 
 #include <sigc++/bind.h>
 #include <sigc++/class_slot.h>
@@ -28,11 +29,13 @@
 #include <glibmm/thread.h>
 #include <pbd/xml++.h>
 #include <pbd/stacktrace.h>
+#include <pbd/enumwriter.h>
 
 #include <ardour/region.h>
 #include <ardour/playlist.h>
 #include <ardour/session.h>
 #include <ardour/source.h>
+#include <ardour/tempo.h>
 #include <ardour/region_factory.h>
 #include <ardour/filter.h>
 
@@ -59,6 +62,8 @@ Region::Region (Session& s, nframes_t start, nframes_t length, const string& nam
 	, _start(start) 
 	, _length(length) 
 	, _position(0) 
+	, _last_position(0) 
+	, _positional_lock_style(AudioTime)
 	, _sync_position(_start)
 	, _layer(layer)
 	, _first_edit(EditChangesNothing)
@@ -70,7 +75,6 @@ Region::Region (Session& s, nframes_t start, nframes_t length, const string& nam
 	/* no sources at this point */
 }
 
-
 /** Basic Region constructor (single source) */
 Region::Region (boost::shared_ptr<Source> src, nframes_t start, nframes_t length, const string& name, DataType type, layer_t layer, Region::Flag flags)
 	: Automatable(src->session(), name)
@@ -79,6 +83,8 @@ Region::Region (boost::shared_ptr<Source> src, nframes_t start, nframes_t length
 	, _start(start) 
 	, _length(length) 
 	, _position(0) 
+	, _last_position(0) 
+	, _positional_lock_style(AudioTime)
 	, _sync_position(_start)
 	, _layer(layer)
 	, _first_edit(EditChangesNothing)
@@ -86,6 +92,8 @@ Region::Region (boost::shared_ptr<Source> src, nframes_t start, nframes_t length
 	, _ancestral_start (start)
 	, _ancestral_length (length)
 	, _stretch (1.0)
+	, _shift (0.0)
+	, _valid_transients(false)
 	, _read_data_count(0)
 	, _pending_changed(Change (0))
 	, _last_layer_op(0)
@@ -96,6 +104,7 @@ Region::Region (boost::shared_ptr<Source> src, nframes_t start, nframes_t length
 	src->GoingAway.connect (bind (mem_fun (*this, &Region::source_deleted), src));
 
 	assert(_sources.size() > 0);
+	_positional_lock_style = AudioTime;
 }
 
 /** Basic Region constructor (many sources) */
@@ -106,6 +115,8 @@ Region::Region (const SourceList& srcs, nframes_t start, nframes_t length, const
 	, _start(start) 
 	, _length(length) 
 	, _position(0) 
+	, _last_position(0) 
+	, _positional_lock_style(AudioTime)
 	, _sync_position(_start)
 	, _layer(layer)
 	, _first_edit(EditChangesNothing)
@@ -141,6 +152,8 @@ Region::Region (boost::shared_ptr<const Region> other, nframes_t offset, nframes
 	, _start(other->_start + offset) 
 	, _length(length) 
 	, _position(0) 
+	, _last_position(0) 
+	, _positional_lock_style(other->_positional_lock_style)
 	, _sync_position(_start)
 	, _layer(layer)
 	, _first_edit(EditChangesNothing)
@@ -148,6 +161,8 @@ Region::Region (boost::shared_ptr<const Region> other, nframes_t offset, nframes
 	, _ancestral_start (other->_ancestral_start + offset)
 	, _ancestral_length (length)
 	, _stretch (1.0)
+	, _shift (0.0)
+	, _valid_transients(false)
 	, _read_data_count(0)
 	, _pending_changed(Change (0))
 	, _last_layer_op(0)
@@ -185,6 +200,8 @@ Region::Region (boost::shared_ptr<const Region> other)
 	, _start(other->_start) 
 	, _length(other->_length) 
 	, _position(other->_position) 
+	, _last_position(other->_last_position) 
+	, _positional_lock_style(other->_positional_lock_style)
 	, _sync_position(other->_sync_position)
 	, _layer(other->_layer)
 	, _first_edit(EditChangesID)
@@ -192,6 +209,8 @@ Region::Region (boost::shared_ptr<const Region> other)
 	, _ancestral_start (_start)
 	, _ancestral_length (_length)
 	, _stretch (1.0)
+	, _shift (0.0)
+	, _valid_transients(false)
 	, _read_data_count(0)
 	, _pending_changed(Change(0))
 	, _last_layer_op(other->_last_layer_op)
@@ -229,6 +248,8 @@ Region::Region (const SourceList& srcs, const XMLNode& node)
 	, _start(0) 
 	, _length(0) 
 	, _position(0) 
+	, _last_position(0) 
+	, _positional_lock_style(AudioTime)
 	, _sync_position(_start)
 	, _layer(0)
 	, _first_edit(EditChangesNothing)
@@ -267,6 +288,8 @@ Region::Region (boost::shared_ptr<Source> src, const XMLNode& node)
 	, _start(0) 
 	, _length(0) 
 	, _position(0) 
+	, _last_position(0) 
+	, _positional_lock_style(AudioTime)
 	, _sync_position(_start)
 	, _layer(0)
 	, _first_edit(EditChangesNothing)
@@ -373,6 +396,7 @@ Region::set_length (nframes_t len, void *src)
 
 		first_edit ();
 		maybe_uncopy ();
+		invalidate_transients ();
 
 		if (!_frozen) {
 			recompute_at_end ();
@@ -450,12 +474,49 @@ Region::special_set_position (nframes_t pos)
 }
 
 void
+Region::set_position_lock_style (PositionLockStyle ps)
+{
+	boost::shared_ptr<Playlist> pl (playlist());
+
+	if (!pl) {
+		return;
+	}
+
+	_positional_lock_style = ps;
+
+	if (_positional_lock_style == MusicTime) {
+		pl->session().tempo_map().bbt_time (_position, _bbt_time);
+	}
+	
+}
+
+void
+Region::update_position_after_tempo_map_change ()
+{
+	boost::shared_ptr<Playlist> pl (playlist());
+	
+	if (!pl || _positional_lock_style != MusicTime) {
+		return;
+	}
+
+	TempoMap& map (pl->session().tempo_map());
+	nframes_t pos = map.frame_time (_bbt_time);
+	set_position_internal (pos, false);
+}
+
+void
 Region::set_position (nframes_t pos, void *src)
 {
 	if (!can_move()) {
 		return;
 	}
 
+	set_position_internal (pos, true);
+}
+
+void
+Region::set_position_internal (nframes_t pos, bool allow_bbt_recompute)
+{
 	if (_position != pos) {
 		_last_position = _position;
 		_position = pos;
@@ -470,6 +531,15 @@ Region::set_position (nframes_t pos, void *src)
 			_last_length = _length;
 			_length = max_frames - _position;
 		}
+
+		if (allow_bbt_recompute && _positional_lock_style == MusicTime) {
+			boost::shared_ptr<Playlist> pl (playlist());
+			if (pl) {
+				pl->session().tempo_map().bbt_time (_position, _bbt_time);
+			}
+		}
+
+		invalidate_transients ();
 	}
 
 	/* do this even if the position is the same. this helps out
@@ -563,6 +633,7 @@ Region::set_start (nframes_t pos, void *src)
 		_start = pos;
 		_flags = Region::Flag (_flags & ~WholeFile);
 		first_edit ();
+		invalidate_transients ();
 
 		send_change (StartChanged);
 	}
@@ -974,9 +1045,9 @@ Region::state (bool full_state)
 	node->add_property ("length", buf);
 	snprintf (buf, sizeof (buf), "%u", _position);
 	node->add_property ("position", buf);
-	snprintf (buf, sizeof (buf), "%Ld", _ancestral_start);
+	snprintf (buf, sizeof (buf), "%" PRIi64, _ancestral_start);
 	node->add_property ("ancestral-start", buf);
-	snprintf (buf, sizeof (buf), "%Ld", _ancestral_length);
+	snprintf (buf, sizeof (buf), "%" PRIi64, _ancestral_length);
 	node->add_property ("ancestral-length", buf);
 	snprintf (buf, sizeof (buf), "%.12g", _stretch);
 	node->add_property ("stretch", buf);
@@ -1007,6 +1078,13 @@ Region::state (bool full_state)
 	snprintf (buf, sizeof (buf), "%" PRIu32, _sync_position);
 	node->add_property ("sync-position", buf);
 
+	if (_positional_lock_style != AudioTime) {
+		node->add_property ("positional-lock-style", enum_2_string (_positional_lock_style));
+		stringstream str;
+		str << _bbt_time;
+		node->add_property ("bbt-position", str.str());
+	}
+
 	return *node;
 }
 
@@ -1095,6 +1173,27 @@ Region::set_live_state (const XMLNode& node, Change& what_changed, bool send)
 		_sync_position = _start;
 	}
 
+	if ((prop = node.property ("positional-lock-style")) != 0) {
+		_positional_lock_style = PositionLockStyle (string_2_enum (prop->value(), _positional_lock_style));
+
+		if (_positional_lock_style == MusicTime) {
+			if ((prop = node.property ("bbt-position")) == 0) {
+				/* missing BBT info, revert to audio time locking */
+				_positional_lock_style = AudioTime;
+			} else {
+				if (sscanf (prop->value().c_str(), "%d|%d|%d", 
+					    &_bbt_time.bars,
+					    &_bbt_time.beats,
+					    &_bbt_time.ticks) != 3) {
+					_positional_lock_style = AudioTime;
+				}
+			}
+		}
+			
+	} else {
+		_positional_lock_style = AudioTime;
+	}
+
 	/* XXX FIRST EDIT !!! */
 	
 	/* these 3 properties never change as a result of any editing */
@@ -1261,7 +1360,8 @@ Region::region_list_equivalent (boost::shared_ptr<const Region> other) const
 void
 Region::source_deleted (boost::shared_ptr<Source>)
 {
-	delete this;
+	_sources.clear ();
+	drop_references ();
 }
 
 vector<string>
@@ -1397,3 +1497,10 @@ Region::apply (Filter& filter)
 }
 
 
+void
+Region::invalidate_transients ()
+{
+	_valid_transients = false;
+	_transients.clear ();
+}
+
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index c6ace87b73..5a3144b828 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -80,6 +80,7 @@
 #include <ardour/filename_extensions.h>
 #include <ardour/session_directory.h>
 #include <ardour/tape_file_matcher.h>
+#include <ardour/analyser.h>
 
 #ifdef HAVE_LIBLO
 #include <ardour/osc.h>
@@ -107,6 +108,7 @@ Session::mix_buffers_with_gain_t Session::mix_buffers_with_gain = 0;
 Session::mix_buffers_no_gain_t   Session::mix_buffers_no_gain   = 0;
 
 sigc::signal<int> Session::AskAboutPendingState;
+sigc::signal<int,nframes_t,nframes_t> Session::AskAboutSampleRateMismatch;
 sigc::signal<void> Session::SendFeedback;
 
 sigc::signal<void> Session::SMPTEOffsetChanged;
@@ -2771,6 +2773,14 @@ Session::add_source (boost::shared_ptr<Source> source)
 		source->GoingAway.connect (sigc::bind (mem_fun (this, &Session::remove_source), boost::weak_ptr<Source> (source)));
 		set_dirty();
 	}
+	
+	boost::shared_ptr<AudioFileSource> afs;
+
+	if ((afs = boost::dynamic_pointer_cast<AudioFileSource>(source)) != 0) {
+		if (Config->get_auto_analyse_audio()) {
+			Analyser::queue_source_for_analysis (source, false);
+		}
+	} 
 }
 
 void
@@ -3726,6 +3736,15 @@ void
 Session::tempo_map_changed (Change ignored)
 {
 	clear_clicks ();
+	
+	for (PlaylistList::iterator i = playlists.begin(); i != playlists.end(); ++i) {
+		(*i)->update_after_tempo_map_change ();
+	}
+
+	for (PlaylistList::iterator i = unused_playlists.begin(); i != unused_playlists.end(); ++i) {
+		(*i)->update_after_tempo_map_change ();
+	}
+
 	set_dirty ();
 }
 
@@ -3737,7 +3756,7 @@ Session::ensure_buffers (ChanCount howmany)
 {
 	if (current_block_size == 0)
 		return; // too early? (is this ok?)
-
+	
 	// We need at least 2 MIDI scratch buffers to mix/merge
 	if (howmany.n_midi() < 2)
 		howmany.set_midi(2);
diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index d18b9cedd7..af4be07dc4 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -141,6 +141,9 @@ Session::first_stage_init (string fullpath, string snapshot_name)
 	set_history_depth (Config->get_history_depth());
 
 	_current_frame_rate = _engine.frame_rate ();
+	_nominal_frame_rate = _current_frame_rate;
+	_base_frame_rate = _current_frame_rate;
+
 	_tempo_map = new TempoMap (_current_frame_rate);
 	_tempo_map->StateChanged.connect (mem_fun (*this, &Session::tempo_map_changed));
 
@@ -236,9 +239,6 @@ Session::first_stage_init (string fullpath, string snapshot_name)
 		waiting_for_sync_offset = false;
 	}
 
-	_current_frame_rate = 48000;
-	_base_frame_rate = 48000;
-
 	last_smpte_when = 0;
 	_smpte_offset = 0;
 	_smpte_offset_negative = true;
@@ -920,16 +920,16 @@ Session::state(bool full_state)
 
 	// store libardour version, just in case
 	char buf[16];
-	snprintf(buf, sizeof(buf)-1, "%d.%d.%d", 
-		 libardour_major_version, libardour_minor_version, libardour_micro_version);
+	snprintf(buf, sizeof(buf), "%d.%d.%d", libardour3_major_version, libardour3_minor_version, libardour3_micro_version);
 	node->add_property("version", string(buf));
 		
 	/* store configuration settings */
 
 	if (full_state) {
 	
-		/* store the name */
 		node->add_property ("name", _name);
+		snprintf (buf, sizeof (buf), "%" PRId32, _nominal_frame_rate);
+		node->add_property ("sample-rate", buf);
 
 		if (session_dirs.size() > 1) {
 
@@ -1148,7 +1148,6 @@ Session::set_state (const XMLNode& node)
 	int ret = -1;
 
 	_state_of_the_state = StateOfTheState (_state_of_the_state|CannotSave);
-
 	
 	if (node.name() != X_("Session")){
 		fatal << _("programming error: Session: incorrect XML node sent to set_state()") << endmsg;
@@ -1159,6 +1158,17 @@ Session::set_state (const XMLNode& node)
 		_name = prop->value ();
 	}
 
+	if ((prop = node.property (X_("sample-rate"))) != 0) {
+
+		_nominal_frame_rate = atoi (prop->value());
+
+		if (_nominal_frame_rate != _current_frame_rate) {
+			if (AskAboutSampleRateMismatch (_nominal_frame_rate, _current_frame_rate)) {
+				return -1;
+			}
+		}
+	}
+
 	setup_raid_path(_session_dir->root_path().to_string());
 
 	if ((prop = node.property (X_("id-counter"))) != 0) {
@@ -2067,6 +2077,56 @@ Session::auto_save()
 	save_state (_current_snapshot_name);
 }
 
+static bool
+state_file_filter (const string &str, void *arg)
+{
+	return (str.length() > strlen(statefile_suffix) &&
+		str.find (statefile_suffix) == (str.length() - strlen (statefile_suffix)));
+}
+
+struct string_cmp {
+	bool operator()(const string* a, const string* b) {
+		return *a < *b;
+	}
+};
+
+static string*
+remove_end(string* state)
+{
+	string statename(*state);
+	
+	string::size_type start,end;
+	if ((start = statename.find_last_of ('/')) != string::npos) {
+		statename = statename.substr (start+1);
+	}
+		
+	if ((end = statename.rfind(".ardour")) == string::npos) {
+		end = statename.length();
+	}
+
+	return new string(statename.substr (0, end));
+}
+
+vector<string *> *
+Session::possible_states (string path) 
+{
+	PathScanner scanner;
+	vector<string*>* states = scanner (path, state_file_filter, 0, false, false);
+	
+	transform(states->begin(), states->end(), states->begin(), remove_end);
+	
+	string_cmp cmp;
+	sort (states->begin(), states->end(), cmp);
+	
+	return states;
+}
+
+vector<string *> *
+Session::possible_states () const
+{
+	return possible_states(_path);
+}
+
 RouteGroup *
 Session::add_edit_group (string name)
 {
diff --git a/libs/ardour/source.cc b/libs/ardour/source.cc
index a11e82f1e8..7941eb693b 100644
--- a/libs/ardour/source.cc
+++ b/libs/ardour/source.cc
@@ -27,19 +27,22 @@
 #include <cmath>
 #include <iomanip>
 #include <algorithm>
+#include <fstream>
 
 #include <glibmm/thread.h>
+#include <glibmm/miscutils.h>
+#include <glibmm/fileutils.h>
 #include <pbd/xml++.h>
 #include <pbd/pthread_utils.h>
 
 #include <ardour/source.h>
 #include <ardour/playlist.h>
+#include <ardour/session.h>
+#include <ardour/transient_detector.h>
 
 #include "i18n.h"
 
-using std::min;
-using std::max;
-
+using namespace std;
 using namespace ARDOUR;
 
 Source::Source (Session& s, const string& name, DataType type)
@@ -49,6 +52,7 @@ Source::Source (Session& s, const string& name, DataType type)
 	// not true.. is this supposed to be an assertion?
 	//assert(_name.find("/") == string::npos);
 
+	_analysed = false;
 	_timestamp = 0;
 	_length = 0;
 	_in_use = 0;
@@ -60,6 +64,7 @@ Source::Source (Session& s, const XMLNode& node)
 {
 	_timestamp = 0;
 	_length = 0;
+	_analysed = false;
 	_in_use = 0;
 
 	if (set_state (node) || _type == DataType::NIL) {
@@ -135,7 +140,7 @@ Source::add_playlist (boost::shared_ptr<Playlist> pl)
 {
 	std::pair<PlaylistMap::iterator,bool> res;
 	std::pair<boost::shared_ptr<Playlist>, uint32_t> newpair (pl, 1);
-	Glib::Mutex::Lock lm (playlist_lock);
+	Glib::Mutex::Lock lm (_playlist_lock);
 
 	res = _playlists.insert (newpair);
 
@@ -157,7 +162,7 @@ Source::remove_playlist (boost::weak_ptr<Playlist> wpl)
 	}
 
 	PlaylistMap::iterator x;
-	Glib::Mutex::Lock lm (playlist_lock);
+	Glib::Mutex::Lock lm (_playlist_lock);
 
 	if ((x = _playlists.find (pl)) != _playlists.end()) {
 		if (x->second > 1) {
@@ -173,3 +178,90 @@ Source::used () const
 {
 	return _playlists.size();
 }
+
+bool
+Source::has_been_analysed() const
+{
+	Glib::Mutex::Lock lm (_analysis_lock);
+	return _analysed;
+}
+
+void
+Source::set_been_analysed (bool yn)
+{
+	{
+		Glib::Mutex::Lock lm (_analysis_lock);
+		_analysed = yn;
+	}
+	
+	if (yn) {
+		AnalysisChanged(); // EMIT SIGNAL
+	}
+}
+
+int
+Source::load_transients (const string& path)
+{
+	ifstream file (path.c_str());
+
+	if (!file) {
+		return -1;
+	}
+	
+	transients.clear ();
+
+	stringstream strstr;
+	double val;
+
+	while (file.good()) {
+		file >> val;
+
+		if (!file.fail()) {
+			nframes64_t frame = (nframes64_t) floor (val * _session.frame_rate());
+			transients.push_back (frame);
+		}
+	}
+
+	return 0;
+}
+
+string 
+Source::get_transients_path () const
+{
+	vector<string> parts;
+	string s;
+
+	/* old sessions may not have the analysis directory */
+	
+	_session.ensure_subdirs ();
+
+	s = _session.analysis_dir ();
+	parts.push_back (s);
+
+	s = _id.to_s();
+	s += '.';
+	s += TransientDetector::operational_identifier();
+	parts.push_back (s);
+	
+	return Glib::build_filename (parts);
+}
+
+bool
+Source::check_for_analysis_data_on_disk () 
+{
+	/* looks to see if the analysis files for this source are on disk.
+	   if so, mark us already analysed.
+	*/
+
+	string path = get_transients_path ();
+	bool ok = true;
+
+	if (!Glib::file_test (path, Glib::FILE_TEST_EXISTS)) {
+		ok = false;
+	}
+
+	// XXX add other tests here as appropriate
+
+	set_been_analysed (ok);
+	return ok;
+}
diff --git a/libs/ardour/source_factory.cc b/libs/ardour/source_factory.cc
index 02c35d2188..804d4a4d47 100644
--- a/libs/ardour/source_factory.cc
+++ b/libs/ardour/source_factory.cc
@@ -111,6 +111,7 @@ 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;
 }
@@ -118,61 +119,64 @@ SourceFactory::createSilent (Session& s, const XMLNode& node, nframes_t nframes,
 boost::shared_ptr<Source>
 SourceFactory::create (Session& s, const XMLNode& node, bool defer_peaks)
 {
-       DataType type = DataType::AUDIO;
-       const XMLProperty* prop = node.property("type");
+	DataType type = DataType::AUDIO;
+	const XMLProperty* prop = node.property("type");
 
-       if (prop) {
-               type = DataType(prop->value());
-       }
+	if (prop) {
+		type = DataType(prop->value());
+	}
 
-       if (type == DataType::AUDIO) {
+	if (type == DataType::AUDIO) {
 
 #ifdef HAVE_COREAUDIO
 
-	       try {
-		       boost::shared_ptr<Source> ret (new CoreAudioSource (s, node));
-		       
-		       if (setup_peakfile (ret, defer_peaks)) {
-			       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, defer_peaks)) {
-			       return boost::shared_ptr<Source>();
-		       }
-		       
-		       SourceCreated (ret);
-		       return ret;
-	       }
+		try {
+			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;
+		} 
+
+
+		catch (failed_constructor& err) {
+
+			/* this is allowed to throw */
+
+			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;
+		}
 #else
-	       /* this is allowed to throw */
-
-	       boost::shared_ptr<Source> ret (new SndFileSource (s, node));
-	       
-	       if (setup_peakfile (ret, defer_peaks)) {
-		       return boost::shared_ptr<Source>();
-	       }
-	       
-	       SourceCreated (ret);
-	       return ret;
+		/* this is allowed to throw */
+
+		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;
 #endif
-	
-       } else if (type == DataType::MIDI) {
-		   boost::shared_ptr<Source> ret (new SMFSource (s, node));
-		       
-		   SourceCreated (ret);
-		   return ret;
-       }
+
+	} 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>();
 }
@@ -190,6 +194,7 @@ SourceFactory::createReadable (DataType type, Session& s, string path, int chn,
 				return boost::shared_ptr<Source>();
 			}
 
+			ret->check_for_analysis_data_on_disk ();
 			if (announce) {
 				SourceCreated (ret);
 			}
@@ -201,6 +206,7 @@ SourceFactory::createReadable (DataType type, Session& s, string path, int chn,
 			if (setup_peakfile (ret, defer_peaks)) {
 				return boost::shared_ptr<Source>();
 			}
+			ret->check_for_analysis_data_on_disk ();
 			if (announce) {
 				SourceCreated (ret);
 			}
@@ -213,6 +219,7 @@ SourceFactory::createReadable (DataType type, Session& s, string path, int chn,
 			return boost::shared_ptr<Source>();
 		}
 
+		ret->check_for_analysis_data_on_disk ();
 		if (announce) {
 			SourceCreated (ret);
 		}
@@ -225,6 +232,7 @@ SourceFactory::createReadable (DataType type, Session& s, string path, int chn,
 		// FIXME: flags?
 		boost::shared_ptr<Source> ret (new SMFSource (s, path, SMFSource::Flag(0)));
 
+		ret->check_for_analysis_data_on_disk ();
 		if (announce) {
 			SourceCreated (ret);
 		}
@@ -252,6 +260,8 @@ SourceFactory::createWritable (DataType type, Session& s, std::string path, bool
 		if (setup_peakfile (ret, defer_peaks)) {
 			return boost::shared_ptr<Source>();
 		}
+		
+		// no analysis data - this is a new file
 
 		if (announce) {
 			SourceCreated (ret);
@@ -261,6 +271,8 @@ SourceFactory::createWritable (DataType type, Session& s, std::string path, bool
 	} 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);
diff --git a/libs/ardour/tempo.cc b/libs/ardour/tempo.cc
index b2865fc399..3170d588a1 100644
--- a/libs/ardour/tempo.cc
+++ b/libs/ardour/tempo.cc
@@ -246,29 +246,49 @@ TempoMap::~TempoMap ()
 int
 TempoMap::move_metric_section (MetricSection& section, const BBT_Time& when)
 {
-	if (when == section.start()) {
+	if (when == section.start() || !section.movable()) {
 		return -1;
 	}
 
-	if (!section.movable()) {
-		return 1;
-	}
-
 	Glib::RWLock::WriterLock  lm (lock);
 	MetricSectionSorter cmp;
-	BBT_Time corrected (when);
-	
-	if (dynamic_cast<MeterSection*>(&section) != 0) {
-		if (corrected.beats > 1) {
-			corrected.beats = 1;
-			corrected.bars++;
+
+	if (when.beats != 1) {
+
+		/* position by audio frame, then recompute BBT timestamps from the audio ones */
+
+		nframes_t frame = frame_time (when);
+		// cerr << "nominal frame time = " << frame << endl;
+
+		nframes_t prev_frame = round_to_type (frame, -1, Beat);
+		nframes_t next_frame = round_to_type (frame, 1, Beat);
+		
+		// cerr << "previous beat at " << prev_frame << " next at " << next_frame << endl;
+
+		/* use the closest beat */
+
+		if ((frame - prev_frame) < (next_frame - frame)) {
+			frame = prev_frame;
+		} else {
+			frame = next_frame;
 		}
+		
+		// cerr << "actual frame time = " << frame << endl;
+		section.set_frame (frame);
+		// cerr << "frame time = " << section.frame() << endl;
+		timestamp_metrics (false);
+		// cerr << "new BBT time = " << section.start() << endl;
+		metrics->sort (cmp);
+
+	} else {
+
+		/* positioned at bar start already, so just put it there */
+
+		section.set_start (when);
+		metrics->sort (cmp);
+		timestamp_metrics (true);
 	}
-	corrected.ticks = 0;
 
-	section.set_start (corrected);
-	metrics->sort (cmp);
-	timestamp_metrics (true);
 
 	return 0;
 }
@@ -288,7 +308,6 @@ TempoMap::move_meter (MeterSection& meter, const BBT_Time& when)
 		StateChanged (Change (0));
 	}
 }
-		
 
 void
 TempoMap::remove_tempo (const TempoSection& tempo)
@@ -412,11 +431,12 @@ TempoMap::replace_tempo (TempoSection& existing, const Tempo& replacement)
 			TempoSection *ts;
 
 			if ((ts = dynamic_cast<TempoSection*>(*i)) != 0 && ts == &existing) {
-				
-				*((Tempo *) ts) = replacement;
+
+				 *((Tempo *) ts) = replacement;
 
 				replaced = true;
 				timestamp_metrics (true);
+
 				break;
 			}
 		}
@@ -494,6 +514,21 @@ TempoMap::replace_meter (MeterSection& existing, const Meter& replacement)
 }
 
 void
+TempoMap::change_initial_tempo (double beats_per_minute, double note_type)
+{
+	Tempo newtempo (beats_per_minute, note_type);
+	TempoSection* t;
+
+	for (Metrics::iterator i = metrics->begin(); i != metrics->end(); ++i) {
+		if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
+			*((Tempo*) t) = newtempo;
+			StateChanged (Change (0));
+			break;
+		}
+	}
+}
+
+void
 TempoMap::change_existing_tempo_at (nframes_t where, double beats_per_minute, double note_type)
 {
 	Tempo newtempo (beats_per_minute, note_type);
@@ -582,6 +617,8 @@ TempoMap::timestamp_metrics (bool use_bbt)
 
 	if (use_bbt) {
 
+		// cerr << "\n\n\n ######################\nTIMESTAMP via BBT ##############\n" << endl;
+
 		nframes_t current = 0;
 		nframes_t section_frames;
 		BBT_Time start;
@@ -611,42 +648,68 @@ TempoMap::timestamp_metrics (bool use_bbt)
 
 	} else {
 
+		// cerr << "\n\n\n ######################\nTIMESTAMP via AUDIO ##############\n" << endl;
+
 		bool first = true;
+		MetricSection* prev = 0;
 
 		for (i = metrics->begin(); i != metrics->end(); ++i) {
 
 			BBT_Time bbt;
-
-			bbt_time_with_metric ((*i)->frame(), bbt, Metric (*meter, *tempo));
+			Metric metric (*meter, *tempo);
+			
+			if (prev) {
+				metric.set_start (prev->start());
+			} else {
+				// metric will be at frames=0 bbt=1|1|0 by default
+				// which is correct for our purpose
+			}
+		
+			bbt_time_with_metric ((*i)->frame(), bbt, metric);
 
 			// cerr << "timestamp @ " << (*i)->frame() << " with " << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << " => ";
+			
 
 			if (first) {
 				first = false;
 			} else {
-				if (bbt.beats != 1 || bbt.ticks != 0) {
+				
+				if (bbt.ticks > Meter::ticks_per_beat/2) {
+					/* round up to next beat */
+					bbt.beats += 1;
+				} 
+
+				bbt.ticks = 0;
+
+				if (bbt.beats != 1) {
+					/* round up to next bar */
 					bbt.bars += 1;
 					bbt.beats = 1;
-					bbt.ticks = 0;
 				}
 			}
-
-			// cerr << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << endl;
-
+			
+			//s cerr << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << endl;
+			
 			(*i)->set_start (bbt);
 
 			if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
 				tempo = t;
+				// cerr << "NEW TEMPO, frame = " << (*i)->frame() << " start = " << (*i)->start() <<endl;
 			} else if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
 				meter = m;
+				// cerr << "NEW METER, frame = " << (*i)->frame() << " start = " << (*i)->start() <<endl;
 			} else {
 				fatal << _("programming error: unhandled MetricSection type") << endmsg;
 				/*NOTREACHED*/
 			}
+
+			prev = (*i);
 		}
 	}
 
 	// dump (cerr);
+	// cerr << "###############################################\n\n\n" << endl;
+
 }
 
 TempoMap::Metric
@@ -741,6 +804,8 @@ TempoMap::bbt_time_with_metric (nframes_t frame, BBT_Time& bbt, const Metric& me
 	double xtra_beats = 0;
 	double beats = 0;
 
+	// cerr << "---- BBT time for " << frame << " using metric @ " << metric.frame() << " BBT " << metric.start() << endl;
+
 	const double beats_per_bar = metric.meter().beats_per_bar();
 	const double frames_per_bar = metric.meter().frames_per_bar (metric.tempo(), _frame_rate);
 	const double beat_frames = metric.tempo().frames_per_beat (_frame_rate, metric.meter());
@@ -748,11 +813,14 @@ TempoMap::bbt_time_with_metric (nframes_t frame, BBT_Time& bbt, const Metric& me
 	/* now compute how far beyond that point we actually are. */
 
 	frame_diff = frame - metric.frame();
+	
+	// cerr << "----\tdelta = " << frame_diff << endl;
 
 	xtra_bars = (uint32_t) floor (frame_diff / frames_per_bar);
 	frame_diff -= (uint32_t) floor (xtra_bars * frames_per_bar);
 	xtra_beats = (double) frame_diff / beat_frames;
 
+	// cerr << "---\tmeaning " << xtra_bars << " xtra bars and " << xtra_beats << " xtra beats\n";
 
 	/* and set the returned value */
 
@@ -765,21 +833,21 @@ TempoMap::bbt_time_with_metric (nframes_t frame, BBT_Time& bbt, const Metric& me
 	bbt.bars = metric.start().bars + xtra_bars; 
 
 	beats = (double) metric.start().beats + xtra_beats;
-
+	
 	bbt.bars += (uint32_t) floor(beats/ (beats_per_bar+1) );
 
 	beats = fmod(beats - 1, beats_per_bar )+ 1.0;
 	bbt.ticks = (uint32_t)( round((beats - floor(beats)) *(double) Meter::ticks_per_beat));
 	bbt.beats = (uint32_t) floor(beats);
-
+	
+	// cerr << "-----\t RETURN " << bbt << endl;
 }
 
-
 nframes_t 
 TempoMap::count_frames_between ( const BBT_Time& start, const BBT_Time& end) const
 {
         /* for this to work with fractional measure types, start and end have to be "legal" BBT types, 
-        that means that the beats and ticks should be inside a bar
+	   that means that the beats and ticks should be inside a bar
 	*/
 
 	nframes_t frames = 0;
@@ -814,7 +882,7 @@ TempoMap::count_frames_between ( const BBT_Time& start, const BBT_Time& end) con
 nframes_t 
 TempoMap::count_frames_between_metrics (const Meter& meter, const Tempo& tempo, const BBT_Time& start, const BBT_Time& end) const
 {
-        /*this is used in timestamping the metrics by actually counting the beats */ 
+        /* this is used in timestamping the metrics by actually counting the beats */ 
 
 	nframes_t frames = 0;
 	uint32_t bar = start.bars;
@@ -834,16 +902,26 @@ TempoMap::count_frames_between_metrics (const Meter& meter, const Tempo& tempo,
 			beat = 1;
 			++bar;
 			++beats_counted;
-		} else {
-			++beat;
-			++beats_counted;
+
 			if (beat > beats_per_bar) {
+
 				/* this is a fractional beat at the end of a fractional bar
-				   so it should only count for the fraction */
+				   so it should only count for the fraction 
+				*/
+
 				beats_counted -= (ceil(beats_per_bar) - beats_per_bar);
 			}
+
+		} else {
+			++beat;
+			++beats_counted;
 		}
 	}
+
+	// cerr << "Counted " << beats_counted << " from " << start << " to " << end 
+	// << " bpb were " << beats_per_bar 
+	// << " fpb was " << beat_frames
+	// << endl;
 	
 	frames = (nframes_t) floor (beats_counted * beat_frames);
 
@@ -1052,7 +1130,6 @@ TempoMap::round_to_beat_subdivision (nframes_t fr, int sub_num)
 }
 
 nframes_t
-
 TempoMap::round_to_type (nframes_t frame, int dir, BBTPointType type)
 {
 	Metric metric = metric_at (frame);
@@ -1191,7 +1268,9 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const
 
 		if (i == metrics->end()) {
 			limit = upper;
+			// cerr << "== limit set to end of request @ " << limit << endl;
 		} else {
+ 			// cerr << "== limit set to next metric @ " << (*i)->frame() << endl;
 			limit = (*i)->frame();
 		}
 
@@ -1224,6 +1303,10 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const
 				beat++;
 			}
 
+			//  cerr << "out of beats, @ end ? " << (i == metrics->end()) << " out of bpb ? "
+			// << (beat > ceil(beats_per_bar))
+			// << endl;
+
 			if (beat > ceil(beats_per_bar) || i != metrics->end()) {
 
 				/* we walked an entire bar. its
@@ -1245,9 +1328,11 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const
 				if (beat > ceil (beats_per_bar)) {
 					/* next bar goes where the numbers suggest */
 					current -=  beat_frames * (ceil(beats_per_bar)-beats_per_bar);
+					// cerr << "++ next bar from numbers\n";
 				} else {
 					/* next bar goes where the next metric is */
 					current = limit;
+					// cerr << "++ next bar at next metric\n";
 				}
 				bar++;
 				beat = 1;
@@ -1275,6 +1360,9 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const
 				beat = 1;
 			}
 
+			current = (*i)->frame ();
+			// cerr << "loop around with current @ " << current << endl;
+
 			beats_per_bar = meter->beats_per_bar ();
 			frames_per_bar = meter->frames_per_bar (*tempo, _frame_rate);
 			beat_frames = tempo->frames_per_beat (_frame_rate, *meter);
@@ -1419,3 +1507,32 @@ TempoMap::dump (std::ostream& o) const
 	}
 }
 
+int
+TempoMap::n_tempos() const
+{
+	Glib::RWLock::ReaderLock lm (lock);
+	int cnt = 0;
+
+	for (Metrics::const_iterator i = metrics->begin(); i != metrics->end(); ++i) {
+		if (dynamic_cast<const TempoSection*>(*i) != 0) {
+			cnt++;
+		}
+	}
+
+	return cnt;
+}
+
+int
+TempoMap::n_meters() const
+{
+	Glib::RWLock::ReaderLock lm (lock);
+	int cnt = 0;
+
+	for (Metrics::const_iterator i = metrics->begin(); i != metrics->end(); ++i) {
+		if (dynamic_cast<const MeterSection*>(*i) != 0) {
+			cnt++;
+		}
+	}
+
+	return cnt;
+}
diff --git a/libs/ardour/transient_detector.cc b/libs/ardour/transient_detector.cc
index b85700dd90..b92bf5fb2d 100644
--- a/libs/ardour/transient_detector.cc
+++ b/libs/ardour/transient_detector.cc
@@ -6,20 +6,36 @@ using namespace Vamp;
 using namespace ARDOUR;
 using namespace std;
 
+string TransientDetector::_op_id;
+
 TransientDetector::TransientDetector (float sr)
 	: AudioAnalyser (sr, X_("libardourvampplugins:percussiononsets"))
 {
+	if (_op_id.empty()) {
+		_op_id = X_("libardourvampplugins:percussiononsets");
+
+		// XXX this should load the above-named plugin and get the current version
+
+		_op_id += ":2";
+	}
 }
 
 TransientDetector::~TransientDetector()
 {
 }
 
+string
+TransientDetector::operational_identifier()
+{
+	return _op_id;
+}
+
 int
-TransientDetector::run (const std::string& path, Readable* src, uint32_t channel, vector<nframes64_t>& results)
+TransientDetector::run (const std::string& path, Readable* src, uint32_t channel, AnalysisFeatureList& results)
 {
 	current_results = &results;
 	int ret = analyse (path, src, channel);
+
 	current_results = 0;
 	return ret;
 }
@@ -59,3 +75,42 @@ TransientDetector::set_sensitivity (float val)
 		plugin->setParameter ("sensitivity", val);
 	}
 }
+
+void
+TransientDetector::cleanup_transients (AnalysisFeatureList& t, float sr, float gap_msecs)
+{
+	if (t.empty()) {
+		return;
+	}
+
+	t.sort ();
+	
+	/* remove duplicates or other things that are too close */
+	
+	AnalysisFeatureList::iterator i = t.begin();
+	AnalysisFeatureList::iterator f, b;
+	const nframes64_t gap_frames = (nframes64_t) floor (gap_msecs * (sr / 1000.0));
+	
+	while (i != t.end()) {
+
+		// move front iterator to just past i, and back iterator the same place
+		
+		f = i;
+		++f;
+		b = f;
+
+		// move f until we find a new value that is far enough away
+		
+		while ((f != t.end()) && (((*f) - (*i)) < gap_frames)) {
+			++f;
+		}
+
+		i = f;
+
+		// if f moved forward from b, we had duplicates/too-close points: get rid of them
+
+		if (b != f) {
+			t.erase (b, f);
+		}
+	}
+}
diff --git a/libs/libgnomecanvasmm/SConscript b/libs/libgnomecanvasmm/SConscript
index cc0aff0bd8..40967cc8d2 100644
--- a/libs/libgnomecanvasmm/SConscript
+++ b/libs/libgnomecanvasmm/SConscript
@@ -18,7 +18,8 @@ gnomecanvasmm.Merge([libraries['glibmm2'],
                      libraries['libgnomecanvas2'],
                      libraries['cairomm']])
 
-gnomecanvasmm.Append(CXXFLAGS = ["-DGLIBMM_PROPERTIES_ENABLED", "-DGLIBMM_EXCEPTIONS_ENABLED"])
+if gnomecanvasmm['IS_OSX']:
+	gnomecanvasmm.Append (LINKFLAGS="-Xlinker -headerpad -Xlinker 2048")
 
 libgnomecanvasmm = gnomecanvasmm.SharedLibrary('libgnomecanvasmm', gnomecanvasmm_files)
 Default(libgnomecanvasmm)
diff --git a/libs/midi++2/SConscript b/libs/midi++2/SConscript
index 769d888903..9d2ce5c95e 100644
--- a/libs/midi++2/SConscript
+++ b/libs/midi++2/SConscript
@@ -9,6 +9,9 @@ Import('env libraries install_prefix')
 midi2 = env.Copy()
 midi2.Merge([ libraries['sigc2'], libraries['xml'], libraries['glibmm2'], libraries['glib2'], libraries['pbd'], libraries['jack'] ])
 
+if midi2['IS_OSX']:
+	midi2.Append (LINKFLAGS="-Xlinker -headerpad -Xlinker 2048")
+
 domain = 'midipp'
 
 midi2.Append(DOMAIN=domain,MAJOR=2,MINOR=1,MICRO=1)
diff --git a/libs/vamp-sdk/vamp-sdk/hostext/PluginBufferingAdapter.cpp b/libs/vamp-sdk/vamp-sdk/hostext/PluginBufferingAdapter.cpp
index 406d4978c4..cbe179fb6b 100644
--- a/libs/vamp-sdk/vamp-sdk/hostext/PluginBufferingAdapter.cpp
+++ b/libs/vamp-sdk/vamp-sdk/hostext/PluginBufferingAdapter.cpp
@@ -57,6 +57,8 @@ public:
 
     OutputList getOutputDescriptors() const;
 
+    void reset();
+
     FeatureSet process(const float *const *inputBuffers, RealTime timestamp);
 		
     FeatureSet getRemainingFeatures();
@@ -225,7 +227,8 @@ protected:
     vector<RingBuffer *> m_queue;
     float **m_buffers;
     float m_inputSampleRate;
-    RealTime m_timestamp;	
+    RealTime m_timestamp;
+    bool m_unrun;
     OutputList m_outputs;
 		
     void processBlock(FeatureSet& allFeatureSets, RealTime timestamp);
@@ -253,6 +256,12 @@ PluginBufferingAdapter::getOutputDescriptors() const
 {
     return m_impl->getOutputDescriptors();
 }
+
+void
+PluginBufferingAdapter::reset()
+{
+    m_impl->reset();
+}
 		
 PluginBufferingAdapter::FeatureSet
 PluginBufferingAdapter::process(const float *const *inputBuffers,
@@ -277,7 +286,8 @@ PluginBufferingAdapter::Impl::Impl(Plugin *plugin, float inputSampleRate) :
     m_queue(0),
     m_buffers(0),
     m_inputSampleRate(inputSampleRate),
-    m_timestamp()
+    m_timestamp(RealTime::zeroTime),
+    m_unrun(true)
 {
     m_outputs = plugin->getOutputDescriptors();
 }
@@ -333,8 +343,8 @@ PluginBufferingAdapter::Impl::initialise(size_t channels, size_t stepSize, size_
         }
     }
     
-    std::cerr << "PluginBufferingAdapter::initialise: stepSize " << m_inputStepSize << " -> " << m_stepSize 
-              << ", blockSize " << m_inputBlockSize << " -> " << m_blockSize << std::endl;			
+    // std::cerr << "PluginBufferingAdapter::initialise: stepSize " << m_inputStepSize << " -> " << m_stepSize 
+    // << ", blockSize " << m_inputBlockSize << " -> " << m_blockSize << std::endl;			
     
     // current implementation breaks if step is greater than block
     if (m_stepSize > m_blockSize) {
@@ -365,11 +375,27 @@ PluginBufferingAdapter::Impl::getOutputDescriptors() const
     return outs;
 }
 
+void
+PluginBufferingAdapter::Impl::reset()
+{
+    m_timestamp = RealTime::zeroTime;
+    m_unrun = true;
+
+    for (size_t i = 0; i < m_queue.size(); ++i) {
+        m_queue[i]->reset();
+    }
+}
+
 PluginBufferingAdapter::FeatureSet
 PluginBufferingAdapter::Impl::process(const float *const *inputBuffers,
                                       RealTime timestamp)
 {
     FeatureSet allFeatureSets;
+
+    if (m_unrun) {
+        m_timestamp = timestamp;
+        m_unrun = false;
+    }
 			
     // queue the new input
     
diff --git a/libs/vamp-sdk/vamp-sdk/hostext/PluginBufferingAdapter.h b/libs/vamp-sdk/vamp-sdk/hostext/PluginBufferingAdapter.h
index 96a958b9e5..24ca6f8db8 100644
--- a/libs/vamp-sdk/vamp-sdk/hostext/PluginBufferingAdapter.h
+++ b/libs/vamp-sdk/vamp-sdk/hostext/PluginBufferingAdapter.h
@@ -81,6 +81,8 @@ public:
     
     OutputList getOutputDescriptors() const;
 
+    void reset();
+
     FeatureSet process(const float *const *inputBuffers, RealTime timestamp);
     
     FeatureSet getRemainingFeatures();
diff --git a/libs/vamp-sdk/vamp-sdk/hostext/PluginChannelAdapter.cpp b/libs/vamp-sdk/vamp-sdk/hostext/PluginChannelAdapter.cpp
index 3ce51cedd2..fe676bcafd 100644
--- a/libs/vamp-sdk/vamp-sdk/hostext/PluginChannelAdapter.cpp
+++ b/libs/vamp-sdk/vamp-sdk/hostext/PluginChannelAdapter.cpp
@@ -143,7 +143,7 @@ PluginChannelAdapter::Impl::initialise(size_t channels, size_t stepSize, size_t
 
         m_pluginChannels = minch;
 
-        std::cerr << "PluginChannelAdapter::initialise: expanding " << m_inputChannels << " to " << m_pluginChannels << " for plugin" << std::endl;
+        // std::cerr << "PluginChannelAdapter::initialise: expanding " << m_inputChannels << " to " << m_pluginChannels << " for plugin" << std::endl;
 
     } else if (m_inputChannels > maxch) {
 
@@ -155,18 +155,18 @@ PluginChannelAdapter::Impl::initialise(size_t channels, size_t stepSize, size_t
             m_buffer = new float *[1];
             m_buffer[0] = new float[blockSize];
 
-            std::cerr << "PluginChannelAdapter::initialise: mixing " << m_inputChannels << " to mono for plugin" << std::endl;
+            // std::cerr << "PluginChannelAdapter::initialise: mixing " << m_inputChannels << " to mono for plugin" << std::endl;
 
         } else {
             
-            std::cerr << "PluginChannelAdapter::initialise: reducing " << m_inputChannels << " to " << m_pluginChannels << " for plugin" << std::endl;
+            // std::cerr << "PluginChannelAdapter::initialise: reducing " << m_inputChannels << " to " << m_pluginChannels << " for plugin" << std::endl;
         }
 
         m_pluginChannels = maxch;
 
     } else {
  
-        std::cerr << "PluginChannelAdapter::initialise: accepting given number of channels (" << m_inputChannels << ")" << std::endl;
+        // std::cerr << "PluginChannelAdapter::initialise: accepting given number of channels (" << m_inputChannels << ")" << std::endl;
         m_pluginChannels = m_inputChannels;
     }
 
diff --git a/libs/vamp-sdk/vamp-sdk/hostext/PluginInputDomainAdapter.cpp b/libs/vamp-sdk/vamp-sdk/hostext/PluginInputDomainAdapter.cpp
index e706414ae2..273925f96d 100644
--- a/libs/vamp-sdk/vamp-sdk/hostext/PluginInputDomainAdapter.cpp
+++ b/libs/vamp-sdk/vamp-sdk/hostext/PluginInputDomainAdapter.cpp
@@ -8,6 +8,9 @@
     Centre for Digital Music, Queen Mary, University of London.
     Copyright 2006-2007 Chris Cannam and QMUL.
   
+    This file is based in part on Don Cross's public domain FFT
+    implementation.
+
     Permission is hereby granted, free of charge, to any person
     obtaining a copy of this software and associated documentation
     files (the "Software"), to deal in the Software without
@@ -38,28 +41,33 @@
 
 #include <cmath>
 
-
 /**
  * If you want to compile using FFTW instead of the built-in FFT
  * implementation for the PluginInputDomainAdapter, define HAVE_FFTW3
  * in the Makefile.
  *
- * Remember that FFTW is licensed under the GPL (unlike this SDK, which
- * is licensed liberally in order to permit closed-source usage), so
- * you should not define this symbol unless your code is also under the
- * GPL.  Also, parties redistributing this SDK for use in other
- * programs should be careful _not_ to define this symbol in order not
- * to affect the stated license of this SDK.
+ * Be aware that FFTW is licensed under the GPL -- unlike this SDK,
+ * which is provided under a more liberal BSD license in order to
+ * permit use in closed source applications.  The use of FFTW would
+ * mean that your code would need to be licensed under the GPL as
+ * well.  Do not define this symbol unless you understand and accept
+ * the implications of this.
+ *
+ * Parties such as Linux distribution packagers who redistribute this
+ * SDK for use in other programs should _not_ define this symbol, as
+ * it would change the effective licensing terms under which the SDK
+ * was available to third party developers.
+ *
+ * The default is not to use FFTW, and to use the built-in FFT instead.
  * 
- * Note: This code uses FFTW_MEASURE, and will perform badly on its
- * first invocation unless the host has saved and restored FFTW wisdom
- * (see the FFTW documentation).
+ * Note: The FFTW code uses FFTW_MEASURE, and so will perform badly on
+ * its first invocation unless the host has saved and restored FFTW
+ * wisdom (see the FFTW documentation).
  */
 #ifdef HAVE_FFTW3
 #include <fftw3.h>
 #endif
 
-
 namespace Vamp {
 
 namespace HostExt {