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optimize midi delayline.

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This commit is contained in:
Robin Gareus 2014-06-15 16:36:13 +02:00 • committed by Paul Davis
parent 8cb24865d2
commit f1533a03da
1 changed files with 21 additions and 13 deletions
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34
libs/ardour/delayline.cc
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@ -222,10 +222,12 @@ DelayLine::run (BufferSet& bufs, framepos_t /* start_frame */, framepos_t /* end
} }
} }
// delay events in current-buffer, in place. if (_delay != 0) {
for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { // delay events in current-buffer, in place.
MidiBuffer::TimeType *t = m.timeptr(); for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) {
*t += _delay; MidiBuffer::TimeType *t = m.timeptr();
*t += _delay;
}
} }
// move events from dly-buffer into current-buffer until nsamples // move events from dly-buffer into current-buffer until nsamples
@ -239,16 +241,22 @@ DelayLine::run (BufferSet& bufs, framepos_t /* start_frame */, framepos_t /* end
m = dly->erase(m); m = dly->erase(m);
} }
// move events after nsamples from current-buffer into dly-buffer /* For now, this is only relevant if there is there's a positive delay.
// and trim current-buffer after nsamples * In the future this could also be used to delay 'too early' events
for (MidiBuffer::iterator m = mb.begin(); m != mb.end();) { * (ie '_global_port_buffer_offset + _port_buffer_offset' - midi_port.cc)
const Evoral::MIDIEvent<MidiBuffer::TimeType> ev (*m, false); */
if (ev.time() < nsamples) { if (_delay != 0) {
++m; // move events after nsamples from current-buffer into dly-buffer
continue; // and trim current-buffer after nsamples
for (MidiBuffer::iterator m = mb.begin(); m != mb.end();) {
const Evoral::MIDIEvent<MidiBuffer::TimeType> ev (*m, false);
if (ev.time() < nsamples) {
++m;
continue;
}
dly->insert_event(ev);
m = mb.erase(m);
} }
dly->insert_event(ev);
m = mb.erase(m);
} }
} }
} }