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+/* This file is part of Ingen.
+ * Copyright (C) 2007-2009 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
+ */
+
+#ifndef MIX_HPP
+#define MIX_HPP
+
+#include <iostream>
+#include "interface/PortType.hpp"
+#include "Buffer.hpp"
+#include "Context.hpp"
+
+namespace Ingen {
+
+inline void
+mix(Context& context, Buffer* dst, const Buffer*const* srcs, uint32_t num_srcs)
+{
+ using Shared::PortType;
+ switch (dst->type().symbol()) {
+ case PortType::AUDIO:
+ case PortType::CONTROL:
+ // Copy the first source
+ dst->copy(context, srcs[0]);
+
+ // Mix in the rest
+ for (uint32_t i = 1; i < num_srcs; ++i) {
+ assert(srcs[i]->type() == PortType::AUDIO || srcs[i]->type() == PortType::CONTROL);
+ ((AudioBuffer*)dst)->accumulate(context, (AudioBuffer*)srcs[i]);
+ }
+
+ break;
+
+ case PortType::EVENTS:
+ dst->clear();
+ for (uint32_t i = 0; i < num_srcs; ++i) {
+ assert(srcs[i]->type() == PortType::EVENTS);
+ srcs[i]->rewind();
+ }
+
+ while (true) {
+ const EventBuffer* first = NULL;
+ for (uint32_t i = 0; i < num_srcs; ++i) {
+ const EventBuffer* const src = (const EventBuffer*)srcs[i];
+ if (src->is_valid()) {
+ if (!first || src->get_event()->frames < first->get_event()->frames)
+ first = src;
+ }
+ }
+ if (first) {
+ const LV2_Event* const ev = first->get_event();
+ ((EventBuffer*)dst)->append(
+ ev->frames, ev->subframes, ev->type, ev->size,
+ (const uint8_t*)ev + sizeof(LV2_Event));
+ first->increment();
+ } else {
+ break;
+ }
+ }
+
+ dst->rewind();
+ break;
+
+ default:
+ std::cerr << "ERROR: Mix of unsupported buffer types" << std::endl;
+ return;
+ }
+}
+
+} // namespace Ingen
+
+#endif // MIX_HPP