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author | David Robillard <d@drobilla.net> | 2010-01-05 02:31:33 +0000 |
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committer | David Robillard <d@drobilla.net> | 2010-01-05 02:31:33 +0000 |
commit | f1a8e02f49de5545b69af7afeaff376a1c47f1f8 (patch) | |
tree | 721e3f53786c7dd1579c1f72b396cf11e62bcc5e /src/engine/mix.hpp | |
parent | 13eaacac207abce0b99159b29ea06df47c4c0e15 (diff) | |
download | ingen-f1a8e02f49de5545b69af7afeaff376a1c47f1f8.tar.gz ingen-f1a8e02f49de5545b69af7afeaff376a1c47f1f8.tar.bz2 ingen-f1a8e02f49de5545b69af7afeaff376a1c47f1f8.zip |
Event mixing.
git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@2337 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'src/engine/mix.hpp')
-rw-r--r-- | src/engine/mix.hpp | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/engine/mix.hpp b/src/engine/mix.hpp new file mode 100644 index 00000000..a4cd16d8 --- /dev/null +++ b/src/engine/mix.hpp @@ -0,0 +1,84 @@ +/* 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 |