diff options
Diffstat (limited to 'libs/ardour/internal_audio_port.cc')
-rw-r--r-- | libs/ardour/internal_audio_port.cc | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/libs/ardour/internal_audio_port.cc b/libs/ardour/internal_audio_port.cc new file mode 100644 index 0000000000..e5362cde95 --- /dev/null +++ b/libs/ardour/internal_audio_port.cc @@ -0,0 +1,71 @@ +/* + Copyright (C) 2006 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 <cassert> +#include <ardour/internal_audio_port.h> +#include <ardour/audioengine.h> + +using namespace ARDOUR; +using namespace std; + +void +InternalAudioPort::default_mixdown (const list<InternalPort*>& ports, AudioBuffer& dest, nframes_t cnt, nframes_t offset) +{ + list<InternalPort*>::const_iterator p = ports.begin(); + + dest.read_from ((dynamic_cast<AudioPort*>(*p))->get_audio_buffer(), cnt, offset); + + for (; p != ports.end(); ++p) { + dest.accumulate_from ((dynamic_cast<AudioPort*>(*p))->get_audio_buffer(), cnt, offset); + } +} + +InternalAudioPort::InternalAudioPort(const string& name, Flags flags) + : Port (DataType::AUDIO, flags) + , AudioPort (flags, engine->frames_per_cycle()) + , InternalPort (name, DataType::AUDIO, flags) +{ + _mixdown = default_mixdown; +} + +void +InternalAudioPort::set_mixdown_function (void (*func)(const list<InternalPort*>&, AudioBuffer&, nframes_t, nframes_t)) +{ + _mixdown = func; +} + +void +InternalAudioPort::reset () +{ + _buffer.resize (engine->frames_per_cycle()); + _buffer.silence (_buffer.size()); +} + +AudioBuffer& +InternalAudioPort::get_audio_buffer () +{ + if (_connections.empty()) { + return AudioPort::get_audio_buffer(); + } + + /* XXX what about offset/size being more dynamic ? */ + + (*_mixdown) (_connections, _buffer, _buffer.size(), 0); + + return _buffer; +} |