MidiCodec Class Reference

Auxiliary class to translate between raw MIDI streams and ALSA events. More...

#include <alsaevent.h>

Inheritance diagram for MidiCodec:

Public Member Functions
	MidiCodec (int bufsize, QObject *parent=nullptr)
	MidiCodec constructor. More...
	~MidiCodec ()
	Destructor.
void	init ()
	CODEC initialization.
long	decode (unsigned char *buf, long count, const snd_seq_event_t *ev)
	Decode from event to bytes. More...
long	encode (const unsigned char *buf, long count, snd_seq_event_t *ev)
	Encode from byte stream. More...
long	encode (int c, snd_seq_event_t *ev)
	Read one byte and encode to sequencer event if finished. More...
void	enableRunningStatus (bool enable)
	Enable MIDI running status (command merge) More...
void	resetEncoder ()
	Reset MIDI encode parser.
void	resetDecoder ()
	Reset MIDI decode parser.
void	resizeBuffer (int bufsize)
	Resize the CODEC buffer. More...

Detailed Description

Auxiliary class to translate between raw MIDI streams and ALSA events.

Definition at line 787 of file alsaevent.h.

Constructor & Destructor Documentation

MidiCodec()

MidiCodec ( int  bufsize, QObject *  parent = nullptr  )

explicit

MidiCodec constructor.

Parameters

bufsize	The buffer size of the CODEC
parent	The optional parent object

Definition at line 1163 of file alsaevent.cpp.

References DRUMSTICK_ALSA_CHECK_ERROR.

Member Function Documentation

decode()

long decode	(	unsigned char *	buf,
		long	count,
		const snd_seq_event_t *	ev
	)

Decode from event to bytes.

Parameters

buf	A buffer to get the results
count	Available bytes in MIDI byte stream
ev	The input event

Returns

The number of written bytes if success.

Definition at line 1193 of file alsaevent.cpp.

References DRUMSTICK_ALSA_CHECK_WARNING.

enableRunningStatus()

void enableRunningStatus

(

bool

enable

)

Enable MIDI running status (command merge)

Parameters

enable

True to enable, false to disable.

Definition at line 1233 of file alsaevent.cpp.

encode() [1/2]

long encode	(	const unsigned char *	buf,
		long	count,
		snd_seq_event_t *	ev
	)

Encode from byte stream.

Parameters

buf	MIDI byte stream
count	Bytes of MIDI byte stream to encode
ev	Result - sequencer event

Returns

Number of written bytes if success.

Definition at line 1208 of file alsaevent.cpp.

References DRUMSTICK_ALSA_CHECK_WARNING.

encode() [2/2]

long encode	(	int	c,
		snd_seq_event_t *	ev
	)

Read one byte and encode to sequencer event if finished.

Parameters

c	A byte of MIDI stream
ev	Result - sequencer event

Returns

1 - sequencer event is completed, 0 - next byte is required for completion, otherwise a negative error code

Definition at line 1222 of file alsaevent.cpp.

References DRUMSTICK_ALSA_CHECK_WARNING.

resizeBuffer()

void resizeBuffer

(

int

bufsize

)

Resize the CODEC buffer.

Parameters

bufsize

New buffer size.

Definition at line 1261 of file alsaevent.cpp.

References DRUMSTICK_ALSA_CHECK_WARNING.

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The documentation for this class was generated from the following files:

• alsaevent.h
• alsaevent.cpp