libardour added.

git-svn-id: svn://localhost/trunk/ardour2@17 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 181 insertions, 0 deletions

diff --git a/libs/ardour/auditioner.cc b/libs/ardour/auditioner.cc
new file mode 100644
index 0000000000..ed97cf7b39
--- /dev/null
+++ b/libs/ardour/auditioner.cc
@@ -0,0 +1,181 @@
+/*
+    Copyright (C) 2001 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/lockmonitor.h>
+
+#include <ardour/diskstream.h>
+#include <ardour/audioregion.h>
+#include <ardour/route.h>
+#include <ardour/session.h>
+#include <ardour/auditioner.h>
+#include <ardour/audioplaylist.h>
+#include <ardour/panner.h>
+
+using namespace std;
+using namespace ARDOUR;
+
+Auditioner::Auditioner (Session& s)
+	: AudioTrack (s, "auditioner", Route::Hidden)
+{
+	string left = Config->get_auditioner_output_left();
+	string right = Config->get_auditioner_output_right();
+	
+	if ((left.length() == 0) && (right.length() == 0)) {
+		return;
+	}
+
+	defer_pan_reset ();
+
+	if (left.length()) {
+		add_output_port (left, this);
+	}
+
+	if (right.length()) {
+		disk_stream().add_channel();
+		add_output_port (right, this);
+	}
+
+	allow_pan_reset ();
+	
+	IO::output_changed.connect (mem_fun (*this, &Auditioner::output_changed));
+
+	the_region = 0;
+	atomic_set (&_active, 0);
+}
+
+Auditioner::~Auditioner ()
+{
+}
+
+AudioPlaylist&
+Auditioner::prepare_playlist ()
+{
+	diskstream->playlist()->clear (false, false);
+	return *diskstream->playlist();
+}
+
+void
+Auditioner::audition_current_playlist ()
+{
+	if (atomic_read (&_active)) {
+		/* don't go via session for this, because we are going
+		   to remain active.
+		*/
+		cancel_audition ();
+	}
+
+	LockMonitor lm (lock, __LINE__, __FILE__);
+	diskstream->seek (0);
+	length = diskstream->playlist()->get_maximum_extent();
+	current_frame = 0;
+
+	/* force a panner reset now that we have all channels */
+
+	_panner->reset (n_outputs(), diskstream->n_channels());
+
+	atomic_set (&_active, 1);
+}
+
+void
+Auditioner::audition_region (AudioRegion& region)
+{
+	if (atomic_read (&_active)) {
+		/* don't go via session for this, because we are going
+		   to remain active.
+		*/
+		cancel_audition ();
+	}
+
+	LockMonitor lm (lock, __LINE__, __FILE__);
+
+	the_region = new AudioRegion (region);
+	the_region->set_position (0, this);
+
+	diskstream->playlist()->clear (true, false);
+	diskstream->playlist()->add_region (*the_region, 0, 1, false);
+
+	while (diskstream->n_channels() < the_region->n_channels()) {
+		diskstream->add_channel ();
+	}
+
+	while (diskstream->n_channels() > the_region->n_channels()) {
+		diskstream->remove_channel ();
+	}
+
+	/* force a panner reset now that we have all channels */
+
+	_panner->reset (n_outputs(), diskstream->n_channels());
+
+	length = the_region->length();
+	diskstream->seek (0);
+	current_frame = 0;
+	atomic_set (&_active, 1);
+}
+
+int
+Auditioner::play_audition (jack_nframes_t nframes)
+{
+	bool need_butler;
+	jack_nframes_t this_nframes;
+	int ret;
+
+	if (atomic_read (&_active) == 0) {
+		silence (nframes, 0);
+		return 0;
+	}
+
+	this_nframes = min (nframes, length - current_frame);
+
+	diskstream->prepare ();
+
+	if ((ret = roll (this_nframes, current_frame, current_frame + nframes, 0, false, false, false)) != 0) {
+		silence (nframes, 0);
+		return ret;
+	}
+
+	need_butler = diskstream->commit (this_nframes);
+	current_frame += this_nframes;
+
+	if (current_frame >= length) {
+		_session.cancel_audition ();
+		return 0;
+	} else {
+		return need_butler ? 1 : 0;
+	}
+}
+
+void
+Auditioner::output_changed (IOChange change, void* src)
+{
+	if (change & ConnectionsChanged) {
+		const char ** connections;
+		connections =  output (0)->get_connections ();
+		if (connections) {
+			Config->set_auditioner_output_left (connections[0]);
+			free (connections);
+		}
+		
+		connections = output (1)->get_connections ();
+		if (connections) {
+			Config->set_auditioner_output_right (connections[0]);
+			free (connections);
+		}
+	}
+}