JackMidiUtil.cpp
/*
Copyright (C) 2010 Devin Anderson
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "JackEngineControl.h"
#include "JackFrameTimer.h"
#include "JackGlobals.h"
#include "JackMidiUtil.h"
#include "JackTime.h"
jack_midi_data_t
Jack::ApplyRunningStatus(size_t *size, jack_midi_data_t **buffer,
jack_midi_data_t running_status)
{
// Stolen and modified from alsa/midi_pack.h
jack_midi_data_t status = **buffer;
if ((status >= 0x80) && (status < 0xf0)) {
if (status == running_status) {
(*buffer)++;
(*size)--;
} else {
running_status = status;
}
} else if (status < 0xf8) {
running_status = 0;
}
return running_status;
}
jack_midi_data_t
Jack::ApplyRunningStatus(jack_midi_event_t *event,
jack_midi_data_t running_status)
{
return ApplyRunningStatus(&(event->size), &(event->buffer),
running_status);
}
jack_nframes_t
Jack::GetCurrentFrame()
{
jack_time_t time = GetMicroSeconds();
JackEngineControl *control = GetEngineControl();
JackTimer timer;
control->ReadFrameTime(&timer);
return timer.Time2Frames(time, control->fBufferSize);
}
jack_nframes_t
Jack::GetFramesFromTime(jack_time_t time)
{
JackEngineControl* control = GetEngineControl();
JackTimer timer;
control->ReadFrameTime(&timer);
return timer.Time2Frames(time, control->fBufferSize);
}
jack_nframes_t
Jack::GetLastFrame()
{
return GetEngineControl()->fFrameTimer.ReadCurrentState()->CurFrame();
}
int
Jack::GetMessageLength(jack_midi_data_t status_byte)
{
switch (status_byte & 0xf0) {
case 0x80:
case 0x90:
case 0xa0:
case 0xb0:
case 0xe0:
return 3;
case 0xc0:
case 0xd0:
return 2;
case 0xf0:
switch (status_byte) {
case 0xf0:
return 0;
case 0xf1:
case 0xf3:
return 2;
case 0xf2:
return 3;
case 0xf4:
case 0xf5:
case 0xf7:
case 0xfd:
break;
default:
return 1;
}
}
return -1;
}
jack_time_t
Jack::GetTimeFromFrames(jack_nframes_t frames)
{
JackEngineControl* control = GetEngineControl();
JackTimer timer;
control->ReadFrameTime(&timer);
return timer.Frames2Time(frames, control->fBufferSize);
}
Jack::JackAtomicState::ReadCurrentState
T * ReadCurrentState()
Returns the current state : only valid in the RT reader thread.
Definition: JackAtomicState.h:144
jack_midi_event_t::buffer
jack_midi_data_t * buffer
Definition: JackMidiPort.h:37
jack_midi_event_t::size
size_t size
Definition: JackMidiPort.h:36
jack_midi_event_t
Definition: JackMidiPort.h:33