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/*
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.
*/
#ifndef __JackMidiUtil__
#define __JackMidiUtil__
#include "JackMidiPort.h"
namespace Jack {
/**
* Use this function to optimize MIDI output by omitting unnecessary status
* bytes. This can't be used with all MIDI APIs, so before using this
* function, make sure that your MIDI API doesn't require complete MIDI
* messages to be sent.
*
* To start using this function, call this method with pointers to the
* `size` and `buffer` arguments of the MIDI message you want to send, and
* set the `running_status` argument to '0'. For each subsequent MIDI
* message, call this method with pointers to its `size` and `buffer`
* arguments, and set the `running_status` argument to the return value of
* the previous call to this function.
*
* Note: This function will alter the `size` and `buffer` of your MIDI
* message for each message that can be optimized.
*/
SERVER_EXPORT jack_midi_data_t
ApplyRunningStatus(size_t *size, jack_midi_data_t **buffer,
jack_midi_data_t running_status=0);
/**
* A wrapper function for the above `ApplyRunningStatus` function.
*/
SERVER_EXPORT jack_midi_data_t
ApplyRunningStatus(jack_midi_event_t *event,
jack_midi_data_t running_status);
/**
* Gets the estimated current time in frames. This function has the same
* functionality as the JACK client API function `jack_frame_time`.
*/
SERVER_EXPORT jack_nframes_t
GetCurrentFrame();
/**
* Gets the estimated frame that will be occurring at the given time. This
* function has the same functionality as the JACK client API function
* `jack_time_to_frames`.
*/
SERVER_EXPORT jack_nframes_t
GetFramesFromTime(jack_time_t time);
/**
* Gets the precise time at the start of the current process cycle. This
* function has the same functionality as the JACK client API function
* `jack_last_frame_time`.
*/
SERVER_EXPORT jack_nframes_t
GetLastFrame();
/**
* Returns the expected message length for the status byte. Returns 0 if
* the status byte is a system exclusive status byte, or -1 if the status
* byte is invalid.
*/
SERVER_EXPORT int
GetMessageLength(jack_midi_data_t status_byte);
/**
* Gets the estimated time at which the given frame will occur. This
* function has the same functionality as the JACK client API function
* `jack_frames_to_time`.
*/
SERVER_EXPORT jack_time_t
GetTimeFromFrames(jack_nframes_t frames);
};
#endif
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