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, 223 insertions, 0 deletions

diff --git a/libs/ardour/session_click.cc b/libs/ardour/session_click.cc
new file mode 100644
index 0000000000..7161de6d78
--- /dev/null
+++ b/libs/ardour/session_click.cc
@@ -0,0 +1,223 @@
+/*
+    Copyright (C) 20002 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 <list>
+#include <cerrno>
+
+#include <ardour/ardour.h>
+#include <ardour/session.h>
+#include <ardour/tempo.h>
+#include <ardour/io.h>
+#include <ardour/buffer_set.h>
+
+#include <sndfile.h>
+
+#include "i18n.h"
+
+using namespace std;
+using namespace ARDOUR;
+using namespace PBD;
+
+Pool Session::Click::pool ("click", sizeof (Click), 128);
+
+void
+Session::click (nframes_t start, nframes_t nframes, nframes_t offset)
+{
+	TempoMap::BBTPointList *points;
+	Sample *buf;
+
+	if (_click_io == 0) {
+		return;
+	}
+
+	Glib::RWLock::WriterLock clickm (click_lock, Glib::TRY_LOCK);
+	
+	if (!clickm.locked() || _transport_speed != 1.0 || !_clicking || click_data == 0) {
+		_click_io->silence (nframes, offset);
+		return;
+	} 
+
+	const nframes_t end = start + (nframes_t)floor(nframes * _transport_speed);
+
+	BufferSet& bufs = get_scratch_buffers(ChanCount(DataType::AUDIO, 1));
+	buf = bufs.get_audio(0).data();
+	points = _tempo_map->get_points (start, end);
+
+	if (points == 0) {
+		goto run_clicks;
+	}
+
+	if (points->empty()) {
+		delete points;
+		goto run_clicks;
+	}
+
+	for (TempoMap::BBTPointList::iterator i = points->begin(); i != points->end(); ++i) {
+		switch ((*i).type) {
+		case TempoMap::Beat:
+			if (click_emphasis_data == 0 || (click_emphasis_data && (*i).beat != 1)) {
+				clicks.push_back (new Click ((*i).frame, click_length, click_data));
+			}
+			break;
+
+		case TempoMap::Bar:
+			if (click_emphasis_data) {
+				clicks.push_back (new Click ((*i).frame, click_emphasis_length, click_emphasis_data));
+			} 
+			break;
+		}
+	}
+	
+  run_clicks:
+	memset (buf, 0, sizeof (Sample) * nframes);
+
+	for (list<Click*>::iterator i = clicks.begin(); i != clicks.end(); ) {
+
+		nframes_t copy;
+		nframes_t internal_offset;
+		Click *clk;
+		list<Click*>::iterator next;
+
+		clk = *i;
+		next = i;
+		++next;
+	
+		if (clk->start < start) {
+			internal_offset = 0;
+		} else {
+			internal_offset = clk->start - start;
+		}
+
+		if (nframes < internal_offset) {
+		         /* we've just located or something.. 
+			    effectively going backwards.
+			    lets get the flock out of here */
+		        break;
+		}
+
+		copy = min (clk->duration - clk->offset, nframes - internal_offset);
+
+		memcpy (buf + internal_offset, &clk->data[clk->offset], copy * sizeof (Sample));
+
+		clk->offset += copy;
+
+		if (clk->offset >= clk->duration) {
+			delete clk;
+			clicks.erase (i);
+		}
+
+
+		i = next;
+	}
+	
+	_click_io->deliver_output (bufs, start, end, nframes, offset);
+}
+
+void
+Session::setup_click_sounds (int which)
+{
+	SNDFILE *sndfile;
+	SF_INFO info;
+
+	clear_clicks();
+
+	if ((which == 0 || which == 1)) {
+		
+		if (click_data && click_data != default_click) {
+			delete [] click_data;
+			click_data = 0;
+		}
+
+		string path = Config->get_click_sound();
+
+		if (path.empty()) {
+
+			click_data = const_cast<Sample*> (default_click);
+			click_length = default_click_length;
+
+		} else {
+
+			if ((sndfile = sf_open (path.c_str(), SFM_READ, &info)) == 0) {
+				char errbuf[256];
+				sf_error_str (0, errbuf, sizeof (errbuf) - 1);
+				warning << string_compose (_("cannot open click soundfile %1 (%2)"), path, errbuf) << endmsg;
+				_clicking = false;
+				return;
+			}
+			
+			click_data = new Sample[info.frames];
+			click_length = info.frames;
+			
+			if (sf_read_float (sndfile, click_data, info.frames) != info.frames) {
+				warning << _("cannot read data from click soundfile") << endmsg;			
+				delete click_data;
+				click_data = 0;
+				_clicking = false;
+			}
+			
+			sf_close (sndfile);
+
+		}
+	}
+		
+	if ((which == 0 || which == -1)) {
+
+		if (click_emphasis_data && click_emphasis_data != default_click_emphasis) {
+			delete [] click_emphasis_data;
+			click_emphasis_data = 0;
+		}
+
+		string path = Config->get_click_emphasis_sound();
+
+		if (path.empty()) {
+			click_emphasis_data = const_cast<Sample*> (default_click_emphasis);
+			click_emphasis_length = default_click_emphasis_length;
+		} else {
+			if ((sndfile = sf_open (path.c_str(), SFM_READ, &info)) == 0) {
+				char errbuf[256];
+				sf_error_str (0, errbuf, sizeof (errbuf) - 1);
+				warning << string_compose (_("cannot open click emphasis soundfile %1 (%2)"), path, errbuf) << endmsg;
+				return;
+			}
+			
+			click_emphasis_data = new Sample[info.frames];
+			click_emphasis_length = info.frames;
+			
+			if (sf_read_float (sndfile, click_emphasis_data, info.frames) != info.frames) {
+				warning << _("cannot read data from click emphasis soundfile") << endmsg;			
+				delete click_emphasis_data;
+				click_emphasis_data = 0;
+			}
+			
+			sf_close (sndfile);
+		}
+	}
+}		
+
+void
+Session::clear_clicks ()
+{
+	Glib::RWLock::WriterLock lm (click_lock);
+
+	for (Clicks::iterator i = clicks.begin(); i != clicks.end(); ++i) {
+		delete *i;
+	}
+
+	clicks.clear ();
+}