add seeking to sfdb auditioner

3 files changed, 57 insertions, 4 deletions

diff --git a/libs/ardour/ardour/auditioner.h b/libs/ardour/ardour/auditioner.h
index 5ce3ddaddf..7e772fe194 100644
--- a/libs/ardour/ardour/auditioner.h
+++ b/libs/ardour/ardour/auditioner.h
@@ -44,6 +44,9 @@ class Auditioner : public AudioTrack
 
 	void audition_region (boost::shared_ptr<Region>);
 
+	void seek_to_frame (frameoffset_t pos) { if (_seek_frame < 0 && !_seeking) { _seek_frame = pos; }}
+	void seek_to_percent (float const pos) { if (_seek_frame < 0 && !_seeking) { _seek_frame = floorf(length * pos / 100.0); }}
+
 	ARDOUR::AudioPlaylist& prepare_playlist ();
 
 	int play_audition (framecnt_t nframes);
@@ -59,12 +62,19 @@ class Auditioner : public AudioTrack
 
 	virtual ChanCount input_streams () const;
 
+	frameoffset_t seek_frame() const { return _seeking ? _seek_frame : -1;}
+	void seek_response(frameoffset_t pos) { _seek_complete = true; if (_seeking) { current_frame = pos; _seek_complete = true;} }
+	PBD::Signal2<void, ARDOUR::framecnt_t, ARDOUR::framecnt_t> AuditionProgress;
+
   private:
 	boost::shared_ptr<AudioRegion> the_region;
 	framepos_t current_frame;
 	mutable gint _auditioning;
 	Glib::Threads::Mutex lock;
 	framecnt_t length;
+	frameoffset_t _seek_frame;
+	bool _seeking;
+	bool _seek_complete;
 	bool via_monitor;
 
 	void drop_ports ();
diff --git a/libs/ardour/auditioner.cc b/libs/ardour/auditioner.cc
index 73670798d8..75a40f142d 100644
--- a/libs/ardour/auditioner.cc
+++ b/libs/ardour/auditioner.cc
@@ -44,6 +44,9 @@ Auditioner::Auditioner (Session& s)
         , current_frame (0)
         , _auditioning (0)
         , length (0)
+        , _seek_frame (-1)
+        , _seeking (false)
+        , _seek_complete (false)
         , via_monitor (false)
 {
 }
@@ -203,6 +206,8 @@ Auditioner::audition_region (boost::shared_ptr<Region> region)
 
 	_main_outs->reset_panner();
 
+	_seek_frame = -1;
+	_seeking = false;
 	length = the_region->length();
 
 	int dir;
@@ -232,14 +237,44 @@ Auditioner::play_audition (framecnt_t nframes)
 		return 0;
 	}
 
-	this_nframes = min (nframes, length - current_frame);
+#if 0 // TODO
+	if (_seeking && _seek_complete) {
+		// set FADE-IN
+	} else if (_seek_frame >= 0 && _seek_frame < length && !_seeking) {
+		// set FADE-OUT -- use/override amp? || use region-gain ?
+	}
+#endif
+
+	if (_seeking && _seek_complete) {
+		_seek_complete = false;
+		_seeking = false;
+		_seek_frame = -1;
+	}
+
+	if(!_seeking) {
+		/* process audio */
+		this_nframes = min (nframes, length - current_frame);
+
+		if ((ret = roll (this_nframes, current_frame, current_frame + nframes, false, need_butler)) != 0) {
+			silence (nframes);
+			return ret;
+		}
 
-	if ((ret = roll (this_nframes, current_frame, current_frame + nframes, false, need_butler)) != 0) {
+		current_frame += this_nframes;
+
+	} else {
 		silence (nframes);
-		return ret;
 	}
 
-	current_frame += this_nframes;
+	if (_seek_frame >= 0 && _seek_frame < length && !_seeking) {
+		_seek_complete = false;
+		_seeking = true;
+		need_butler = true;
+	}
+
+	if (!_seeking) {
+		AuditionProgress(current_frame, length); /* emit */
+	}
 
 	if (current_frame >= length) {
 		_session.cancel_audition ();
diff --git a/libs/ardour/butler.cc b/libs/ardour/butler.cc
index 89b2cc1303..e37734f261 100644
--- a/libs/ardour/butler.cc
+++ b/libs/ardour/butler.cc
@@ -212,6 +212,14 @@ restart:
 			_session.butler_transport_work ();
 		}
 
+		frameoffset_t audition_seek;
+		if (should_run && _session.is_auditioning()
+				&& (audition_seek = _session.the_auditioner()->seek_frame()) > 0) {
+			boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (_session.the_auditioner());
+			tr->seek(audition_seek);
+			_session.the_auditioner()->seek_response(audition_seek);
+		}
+
 		boost::shared_ptr<RouteList> rl = _session.get_routes();
 
 		RouteList rl_with_auditioner = *rl;