Shared abstract Connection interface.

Only Patch to go, now....


git-svn-id: http://svn.drobilla.net/lad/ingen@843 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 0 insertions, 171 deletions

diff --git a/src/libs/engine/Connection.cpp b/src/libs/engine/Connection.cpp
deleted file mode 100644
index 894a9db7..00000000
--- a/src/libs/engine/Connection.cpp
+++ /dev/null
@@ -1,171 +0,0 @@
-/* This file is part of Ingen.
- * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
- * 
- * Ingen 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.
- * 
- * Ingen 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 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.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <algorithm>
-#include <raul/Maid.hpp>
-#include "util.hpp"
-#include "Connection.hpp"
-#include "NodeImpl.hpp"
-#include "PortImpl.hpp"
-#include "BufferFactory.hpp"
-#include "AudioBuffer.hpp"
-#include "ProcessContext.hpp"
-
-namespace Ingen {
-
-
-/** Constructor for a connection from a node's output port.
- *
- * This handles both polyphonic and monophonic nodes, transparently to the 
- * user (InputPort).
- */
-Connection::Connection(PortImpl* src_port, PortImpl* dst_port)
-	: _src_port(src_port)
-	, _dst_port(dst_port)
-	, _local_buffer(NULL)
-	, _buffer_size(dst_port->buffer_size())
-	/*, _must_mix( (src_port->poly() != dst_port->poly())
-			|| (src_port->buffer(0)->size() < dst_port->buffer(0)->size()) )*/
-	, _must_mix( (src_port->polyphonic() && (! dst_port->polyphonic()))
-			|| (src_port->poly() != dst_port->poly() )
-			|| (src_port->buffer(0)->size() < dst_port->buffer(0)->size()) )
-	, _pending_disconnection(false)
-{
-	assert(src_port);
-	assert(dst_port);
-	assert(src_port->type() == dst_port->type());
-
-	/*assert((src_port->parent_node()->poly() == dst_port->parent_node()->poly())
-		|| (src_port->parent_node()->poly() == 1 || dst_port->parent_node()->poly() == 1));*/
-
-	if (type() == DataType::MIDI)
-		_must_mix = false; // FIXME: kludge
-
-	if (_must_mix)
-		_local_buffer = BufferFactory::create(dst_port->type(), dst_port->buffer(0)->size());
-
-	//cerr << src_port->path() << " -> " << dst_port->path() << " must mix: " << _must_mix << endl;
-}
-
-
-Connection::~Connection()
-{
-	delete _local_buffer;
-}
-	
-
-void
-Connection::set_buffer_size(size_t size)
-{
-	if (_must_mix) {
-		assert(_local_buffer);
-		delete _local_buffer;
-
-		_local_buffer = BufferFactory::create(_dst_port->type(), _dst_port->buffer(0)->size());
-	}
-	
-	_buffer_size = size;
-}
-
-
-void
-Connection::prepare_poly(uint32_t poly)
-{
-	if (type() == DataType::CONTROL || type() == DataType::AUDIO)
-		_must_mix = (poly > 1) && (
-				   (_src_port->poly() != _dst_port->poly())
-				|| (_src_port->polyphonic() && !_dst_port->polyphonic())
-				|| (_src_port->parent()->polyphonic() && !_dst_port->parent()->polyphonic()) );
-
-	/*cerr << src_port()->path() << " * " << src_port()->poly()
-			<< " -> " << dst_port()->path() << " * " << dst_port()->poly()
-			<< "\t\tmust mix: " << _must_mix << " at poly " << poly << endl;*/
-
-	if (_must_mix && ! _local_buffer)
-		_local_buffer = BufferFactory::create(_dst_port->type(), _dst_port->buffer(0)->size());
-}
-
-
-void
-Connection::apply_poly(Raul::Maid& maid, uint32_t poly)
-{
-	if (poly == 1 && _local_buffer && !_must_mix) {
-		maid.push(_local_buffer);
-		_local_buffer = NULL;
-	}
-}
-
-
-void
-Connection::process(ProcessContext& context)
-{
-	// FIXME: nframes parameter not used
-	assert(_buffer_size == 1 || _buffer_size == context.nframes());
-
-	/* Thought:  A poly output port can be connected to multiple mono input
-	 * ports, which means this mix down would have to happen many times.
-	 * Adding a method to OutputPort that mixes down all it's outputs into
-	 * a buffer (if it hasn't been done already this cycle) and returns that
-	 * would avoid having to mix multiple times.  Probably not a very common
-	 * case, but it would be faster anyway. */
-	
-	if (_must_mix && (type() == DataType::CONTROL || type() == DataType::AUDIO)) {
-
-		const AudioBuffer* const src_buffer = (AudioBuffer*)src_port()->buffer(0);
-		AudioBuffer*             mix_buf    = (AudioBuffer*)_local_buffer;
-		
-		assert(mix_buf);
-
-		const size_t copy_size = std::min(src_buffer->size(), mix_buf->size());
-
-		// Copy src buffer to start of mix buffer
-		mix_buf->copy((AudioBuffer*)src_port()->buffer(0), 0, copy_size-1);
-
-		// Write last value of src buffer to remainder of dst buffer, if necessary
-		if (copy_size < mix_buf->size())
-			mix_buf->set(src_buffer->value_at(copy_size-1), copy_size, mix_buf->size()-1);
-	
-		// Accumulate the source's voices into local buffer starting at the second
-		// voice (buffer is already set to first voice above)
-		for (uint32_t j=1; j < src_port()->poly(); ++j) {
-			mix_buf->accumulate((AudioBuffer*)src_port()->buffer(j), 0, copy_size-1);
-		}
-		
-		// Find the summed value and write it to the remainder of dst buffer
-		if (copy_size < mix_buf->size()) {
-			float src_value = src_buffer->value_at(copy_size-1);
-			for (uint32_t j=1; j < src_port()->poly(); ++j)
-				src_value += ((AudioBuffer*)src_port()->buffer(j))->value_at(copy_size-1);
-
-			mix_buf->set(src_value, copy_size, mix_buf->size()-1);
-		}
-
-		// Scale the buffer down.
-		if (src_port()->poly() > 1)
-			mix_buf->scale(1.0f/(float)src_port()->poly(), 0, _buffer_size-1);
-
-	} else if (_must_mix && type() == DataType::MIDI) {
-
-		cerr << "WARNING: No MIDI mixing." << endl;
-	
-	}
-
-}
-
-
-} // namespace Ingen
-