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authorDavid Robillard <d@drobilla.net>2006-06-09 15:07:31 +0000
committerDavid Robillard <d@drobilla.net>2006-06-09 15:07:31 +0000
commitacbda29f838280ba98cf9e9e539e9d8a6e8fc6ad (patch)
treee31b37a2456e6d1e564c9a7146c88be259d338b0 /src/engine/ConnectionBase.h
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Added Om aka Graph aka god knows what
git-svn-id: http://svn.drobilla.net/lad/grauph@9 a436a847-0d15-0410-975c-d299462d15a1
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+/* This file is part of Om. Copyright (C) 2006 Dave Robillard.
+ *
+ * Om 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.
+ *
+ * Om 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef CONNECTIONBASE_H
+#define CONNECTIONBASE_H
+
+#include "util/types.h"
+#include "OutputPort.h"
+#include "Connection.h"
+
+namespace Om {
+
+class MidiMessage;
+class Port;
+template <typename T> class InputPort;
+
+
+/** A Connection with a type.
+ *
+ * \ingroup engine
+ */
+template <typename T>
+class ConnectionBase : public Connection
+{
+public:
+ ConnectionBase(OutputPort<T>* const src_port, InputPort<T>* const dst_port);
+ virtual ~ConnectionBase();
+
+ void prepare_buffers();
+
+ inline OutputPort<T>* src_port() const { return (OutputPort<T>*)m_src_port; }
+ inline InputPort<T>* dst_port() const { return (InputPort<T>*)m_dst_port; }
+
+ /** Used by some (recursive) events to prevent double disconnections */
+ bool pending_disconnection() { return m_pending_disconnection; }
+ void pending_disconnection(bool b) { m_pending_disconnection = b; }
+
+ /** Get the buffer for a particular voice.
+ * A ConnectionBase is smart - it knows the destination port respondering the
+ * buffer, and will return accordingly (ie the same buffer for every voice
+ * in a mono->poly connection).
+ */
+ inline Buffer<T>* buffer(size_t voice) const;
+
+private:
+ // Disallow copies (undefined)
+ ConnectionBase(const ConnectionBase& copy);
+ ConnectionBase& operator=(const ConnectionBase&);
+
+ Buffer<T>* m_local_buffer; ///< Only used for poly->mono connections
+ bool m_is_poly_to_mono;
+ size_t m_buffer_size;
+ bool m_pending_disconnection;
+};
+
+
+template <>
+inline Buffer<sample>*
+ConnectionBase<sample>::buffer(size_t voice) const
+{
+ PortBase<sample>* const src_port = (PortBase<sample>*)m_src_port;
+
+ if (m_is_poly_to_mono) {
+ return m_local_buffer;
+ } else {
+ if (src_port->poly() == 1)
+ return src_port->buffer(0);
+ else
+ return src_port->buffer(voice);
+ }
+}
+
+
+template <>
+inline Buffer<MidiMessage>*
+ConnectionBase<MidiMessage>::buffer(size_t voice) const
+{
+ // No such thing as polyphonic MIDI ports
+ assert(m_src_port->poly() == 1);
+ assert(m_dst_port->poly() == 1);
+
+ PortBase<MidiMessage>* const src_port = (PortBase<MidiMessage>*)m_src_port;
+ return src_port->buffer(0);
+}
+
+
+template class ConnectionBase<sample>;
+template class ConnectionBase<MidiMessage>;
+
+} // namespace Om
+
+#endif // CONNECTIONBASE_H