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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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8
libs/ardour/delayline.cc
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@ -222,11 +222,13 @@ DelayLine::run (BufferSet& bufs, framepos_t /* start_frame */, framepos_t /* end
} }
} }
if (_delay != 0) {
// delay events in current-buffer, in place. // delay events in current-buffer, in place.
for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) {
MidiBuffer::TimeType *t = m.timeptr(); MidiBuffer::TimeType *t = m.timeptr();
*t += _delay; *t += _delay;
} }
}
// move events from dly-buffer into current-buffer until nsamples // move events from dly-buffer into current-buffer until nsamples
// and remove them from the dly-buffer // and remove them from the dly-buffer
@ -239,6 +241,11 @@ DelayLine::run (BufferSet& bufs, framepos_t /* start_frame */, framepos_t /* end
m = dly->erase(m); m = dly->erase(m);
} }
/* For now, this is only relevant if there is there's a positive delay.
* In the future this could also be used to delay 'too early' events
* (ie '_global_port_buffer_offset + _port_buffer_offset' - midi_port.cc)
*/
if (_delay != 0) {
// move events after nsamples from current-buffer into dly-buffer // move events after nsamples from current-buffer into dly-buffer
// and trim current-buffer after nsamples // and trim current-buffer after nsamples
for (MidiBuffer::iterator m = mb.begin(); m != mb.end();) { for (MidiBuffer::iterator m = mb.begin(); m != mb.end();) {
@ -252,6 +259,7 @@ DelayLine::run (BufferSet& bufs, framepos_t /* start_frame */, framepos_t /* end
} }
} }
} }
}
_delay = pending_delay; _delay = pending_delay;
} }