122 lines
3.0 KiB
C++
122 lines
3.0 KiB
C++
/*
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Copyright (C) 2010 Devin Anderson
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "JackEngineControl.h"
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#include "JackFrameTimer.h"
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#include "JackGlobals.h"
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#include "JackMidiUtil.h"
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#include "JackTime.h"
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jack_midi_data_t
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Jack::ApplyRunningStatus(size_t *size, jack_midi_data_t **buffer,
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jack_midi_data_t running_status)
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{
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// Stolen and modified from alsa/midi_pack.h
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jack_midi_data_t status = **buffer;
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if ((status >= 0x80) && (status < 0xf0)) {
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if (status == running_status) {
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(*buffer)++;
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(*size)--;
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} else {
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running_status = status;
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}
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} else if (status < 0xf8) {
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running_status = 0;
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}
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return running_status;
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}
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jack_midi_data_t
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Jack::ApplyRunningStatus(jack_midi_event_t *event,
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jack_midi_data_t running_status)
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{
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return ApplyRunningStatus(&(event->size), &(event->buffer),
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running_status);
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}
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jack_nframes_t
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Jack::GetCurrentFrame()
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{
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jack_time_t time = GetMicroSeconds();
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JackEngineControl *control = GetEngineControl();
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JackTimer timer;
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control->ReadFrameTime(&timer);
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return timer.Time2Frames(time, control->fBufferSize);
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}
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jack_nframes_t
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Jack::GetFramesFromTime(jack_time_t time)
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{
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JackEngineControl* control = GetEngineControl();
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JackTimer timer;
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control->ReadFrameTime(&timer);
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return timer.Time2Frames(time, control->fBufferSize);
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}
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jack_nframes_t
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Jack::GetLastFrame()
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{
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return GetEngineControl()->fFrameTimer.ReadCurrentState()->CurFrame();
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}
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int
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Jack::GetMessageLength(jack_midi_data_t status_byte)
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{
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switch (status_byte & 0xf0) {
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case 0x80:
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case 0x90:
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case 0xa0:
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case 0xb0:
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case 0xe0:
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return 3;
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case 0xc0:
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case 0xd0:
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return 2;
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case 0xf0:
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switch (status_byte) {
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case 0xf0:
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return 0;
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case 0xf1:
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case 0xf3:
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return 2;
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case 0xf2:
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return 3;
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case 0xf4:
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case 0xf5:
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case 0xf7:
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case 0xfd:
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break;
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default:
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return 1;
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}
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}
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return -1;
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}
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jack_time_t
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Jack::GetTimeFromFrames(jack_nframes_t frames)
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{
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JackEngineControl* control = GetEngineControl();
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JackTimer timer;
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control->ReadFrameTime(&timer);
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return timer.Frames2Time(frames, control->fBufferSize);
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}
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