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, 126 insertions, 0 deletions

diff --git a/libs/ardour/audio_port.cc b/libs/ardour/audio_port.cc
new file mode 100644
index 0000000000..714be28f34
--- /dev/null
+++ b/libs/ardour/audio_port.cc
@@ -0,0 +1,126 @@
+/*
+    Copyright (C) 2006 Paul Davis 
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <cassert>
+#include <ardour/audio_port.h>
+#include <ardour/jack_audio_port.h>
+#include <ardour/audioengine.h>
+#include <ardour/data_type.h>
+
+using namespace ARDOUR;
+using namespace std;
+
+AudioPort::AudioPort (const std::string& name, Flags flags, bool external, nframes_t capacity)
+	: Port (name, flags)
+	, BaseAudioPort (name, flags)
+	, PortFacade (name, flags)
+{
+	if (!external || receives_input()) {
+
+		/* internal-only and input ports need their own buffers.
+		   external output ports use the external port buffer.
+		*/
+
+		_buffer = new AudioBuffer (capacity);
+		_own_buffer = true;
+	}
+
+	if (!external) {
+
+		_ext_port = 0;
+		set_name (name);
+
+	} else {
+		
+		/* make the JackAudioPort create its own buffer. For input,
+		   we will copy from it during cycle_start(). For output,
+		   we will set up our buffer to point to its buffer, which
+		   will in turn be using the JACK port buffer for data.
+		*/
+
+		_ext_port = new JackAudioPort (name, flags, 0);
+
+		if (sends_output()) {
+			_buffer = &dynamic_cast<JackAudioPort*>(_ext_port)->get_audio_buffer();
+		} 
+
+		Port::set_name (_ext_port->name());
+	}
+
+	reset ();
+}
+
+AudioPort::~AudioPort()
+{
+	if (_ext_port) {
+		delete _ext_port;
+		_ext_port = 0;
+	}
+}
+
+void
+AudioPort::reset()
+{
+	BaseAudioPort::reset();
+
+	if (_ext_port) {
+		_ext_port->reset ();
+	}
+}
+
+
+void
+AudioPort::cycle_start (nframes_t nframes, nframes_t offset)
+{
+	/* caller must hold process lock */
+
+	if (_ext_port) {
+		_ext_port->cycle_start (nframes, offset);
+	}
+
+	if (_flags & IsInput) {
+
+		if (_ext_port) {
+			_buffer->read_from (dynamic_cast<BaseAudioPort*>(_ext_port)->get_audio_buffer(), nframes, offset);
+
+			if (!_connections.empty()) {
+				(*_mixdown) (_connections, _buffer, nframes, offset, false);
+			}
+
+		} else {
+		
+			if (_connections.empty()) {
+				_buffer->silence (nframes, offset);
+			} else {
+				(*_mixdown) (_connections, _buffer, nframes, offset, true);
+			}
+		}
+
+	} else {
+		
+		// XXX if we could get the output stage to not purely mix into, but also
+		// to initially overwrite the buffer, we could avoid this silence step.
+		
+		_buffer->silence (nframes, offset);
+	}
+}
+
+void
+AudioPort::cycle_end (nframes_t nframes, nframes_t offset)
+{
+}