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, 228 insertions, 0 deletions

diff --git a/libs/ardour/send.cc b/libs/ardour/send.cc
new file mode 100644
index 0000000000..736a443c72
--- /dev/null
+++ b/libs/ardour/send.cc
@@ -0,0 +1,228 @@
+/*
+    Copyright (C) 2000 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 <algorithm>
+
+#include <pbd/xml++.h>
+
+#include <ardour/send.h>
+#include <ardour/session.h>
+#include <ardour/port.h>
+#include <ardour/audio_port.h>
+#include <ardour/buffer_set.h>
+#include <ardour/meter.h>
+#include "i18n.h"
+
+using namespace ARDOUR;
+using namespace PBD;
+
+Send::Send (Session& s, Placement p)
+	: IOProcessor (s, string_compose (_("send %1"), (bitslot = s.next_send_id()) + 1), p)
+{
+	_metering = false;
+	ProcessorCreated (this); /* EMIT SIGNAL */
+}
+
+Send::Send (Session& s, const XMLNode& node)
+	: IOProcessor (s,  "send", PreFader)
+{
+	_metering = false;
+
+	if (set_state (node)) {
+		throw failed_constructor();
+	}
+
+	ProcessorCreated (this); /* EMIT SIGNAL */
+}
+
+Send::Send (const Send& other)
+	: IOProcessor (other._session, string_compose (_("send %1"), (bitslot = other._session.next_send_id()) + 1), other.placement())
+{
+	_metering = false;
+	ProcessorCreated (this); /* EMIT SIGNAL */
+}
+
+Send::~Send ()
+{
+	GoingAway ();
+}
+
+XMLNode&
+Send::get_state(void)
+{
+	return state (true);
+}
+
+XMLNode&
+Send::state(bool full)
+{
+	XMLNode& node = IOProcessor::state(full);
+	char buf[32];
+	node.add_property ("type", "send");
+	snprintf (buf, sizeof (buf), "%" PRIu32, bitslot);
+	node.add_property ("bitslot", buf);
+
+	return node;
+}
+
+int
+Send::set_state(const XMLNode& node)
+{
+	XMLNodeList nlist = node.children();
+	XMLNodeIterator niter;
+	const XMLProperty* prop;
+
+	if ((prop = node.property ("bitslot")) == 0) {
+		bitslot = _session.next_send_id();
+	} else {
+		sscanf (prop->value().c_str(), "%" PRIu32, &bitslot);
+		_session.mark_send_id (bitslot);
+	}
+
+	const XMLNode* insert_node = &node;
+
+	/* Send has regular IO automation (gain, pan) */
+
+	for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
+		if ((*niter)->name() == "IOProcessor") {
+			insert_node = *niter;
+		} else if ((*niter)->name() == X_("Automation")) {
+			_io->set_automation_state (*(*niter), Parameter(GainAutomation));
+		}
+	}
+	
+	IOProcessor::set_state (*insert_node);
+
+	return 0;
+}
+
+void
+Send::run_in_place (BufferSet& bufs, nframes_t start_frame, nframes_t end_frame, nframes_t nframes, nframes_t offset)
+{
+	if (active()) {
+
+		// we have to copy the input, because IO::deliver_output may alter the buffers
+		// in-place, which a send must never do.
+
+		BufferSet& sendbufs = _session.get_mix_buffers(bufs.count());
+
+		sendbufs.read_from(bufs, nframes);
+		assert(sendbufs.count() == bufs.count());
+
+		_io->deliver_output (sendbufs, start_frame, end_frame, nframes, offset);
+
+		if (_metering) {
+			if (_io->_gain == 0) {
+				_io->_meter->reset();
+			} else {
+				_io->_meter->run_in_place(_io->output_buffers(), start_frame, end_frame, nframes, offset);
+			}
+		}
+
+	} else {
+		_io->silence (nframes, offset);
+		
+		if (_metering) {
+			_io->_meter->reset();
+		}
+	}
+}
+
+void
+Send::set_metering (bool yn)
+{
+	_metering = yn;
+
+	if (!_metering) {
+		/* XXX possible thread hazard here */
+		_io->peak_meter().reset();
+	}
+}
+
+bool
+Send::can_support_input_configuration (ChanCount in) const
+{
+	if (_io->input_maximum() == ChanCount::INFINITE && _io->output_maximum() == ChanCount::INFINITE) {
+
+		/* not configured yet */
+
+		return true; /* we can support anything the first time we're asked */
+
+	} else {
+
+		/* the "input" config for a port insert corresponds to how
+		   many output ports it will have.
+		*/
+
+		if (_io->output_maximum() == in) {
+
+			return true;
+		} 
+	}
+
+	return false;
+}
+
+ChanCount
+Send::output_for_input_configuration (ChanCount in) const
+{
+	// from the internal (Insert) perspective a Send does not modify its input whatsoever
+	return in;
+}
+
+bool
+Send::configure_io (ChanCount in, ChanCount out)
+{
+	/* we're transparent no matter what.  fight the power. */
+	if (out != in)
+		return false;
+
+	_io->set_output_maximum (in);
+	_io->set_output_minimum (in);
+	_io->set_input_maximum (ChanCount::ZERO);
+	_io->set_input_minimum (ChanCount::ZERO);
+
+	bool success = _io->ensure_io (ChanCount::ZERO, in, false, this) == 0;
+
+	if (success) {
+		Processor::configure_io(in, out);
+		_io->reset_panner();
+		return true;
+	} else {
+		return false;
+	}
+}
+
+ChanCount
+Send::output_streams() const
+{
+	// this method reflects the idea that from the perspective of the Route's ProcessorList, 
+	// a send is just a passthrough. that doesn't match what the Send actually does with its 
+	// data, but since what it does is invisible to the Route, it appears to be a passthrough.
+	
+	return _configured_input;
+}
+
+ChanCount
+Send::input_streams() const
+{
+	return _configured_input;
+}
+
+