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seq_midi_event.c File Reference

MIDI byte <-> sequencer event coder. More...

Data Structures
struct	extra_event_list_t
struct	status_event_list_t
Functions
int	snd_midi_event_new (size_t bufsize, snd_midi_event_t **rdev)
	Initialize MIDI event parser.
void	snd_midi_event_free (snd_midi_event_t *dev)
	Free MIDI event parser.
void	snd_midi_event_no_status (snd_midi_event_t *dev, int on)
	Enable/disable MIDI command merging.
void	snd_midi_event_reset_encode (snd_midi_event_t *dev)
	Reset MIDI encode parser.
void	snd_midi_event_reset_decode (snd_midi_event_t *dev)
	Reset MIDI decode parser.
void	snd_midi_event_init (snd_midi_event_t *dev)
	Initializes MIDI parsers.
int	snd_midi_event_resize_buffer (snd_midi_event_t *dev, size_t bufsize)
	Resize MIDI message (event) buffer.
long	snd_midi_event_encode (snd_midi_event_t *dev, unsigned char *buf, long count, snd_seq_event_t *ev)
	Read bytes and encode to sequencer event if finished.
int	snd_midi_event_encode_byte (snd_midi_event_t *dev, int c, snd_seq_event_t *ev)
	Read one byte and encode to sequencer event if finished.
long	snd_midi_event_decode (snd_midi_event_t *dev, unsigned char *buf, long count, snd_seq_event_t *ev)
	Decode sequencer event to MIDI byte stream.

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Detailed Description

MIDI byte <-> sequencer event coder.

Author:

Takashi Iwai <tiwai@suse.de> , Jaroslav Kysela <perex@suse.cz>

Date:

2000-2001

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Function Documentation

long snd_midi_event_decode (  snd_midi_event_t *    dev, unsigned char *    buf, long    count, snd_seq_event_t *    ev )

Decode sequencer event to MIDI byte stream. Parameters: dev  MIDI event parser buf  Result - MIDI byte stream count  Available bytes in MIDI byte stream ev  Event to decode Returns: count of decoded bytes otherwise a negative error code Decode sequencer event to MIDI byte stream.

long snd_midi_event_encode (  snd_midi_event_t *    dev, unsigned char *    buf, long    count, snd_seq_event_t *    ev )

Read bytes and encode to sequencer event if finished. Parameters: dev  MIDI event parser buf  MIDI byte stream count  count of bytes of MIDI byte stream to encode ev  Result - sequencer event Returns: count of encoded bytes otherwise a negative error code Read bytes and encode to sequencer event if finished. If complete sequencer event is available, ev->type is not equal to SND_SEQ_EVENT_NONE.

int snd_midi_event_encode_byte (  snd_midi_event_t *    dev, int    c, snd_seq_event_t *    ev )

Read one byte and encode to sequencer event if finished. Parameters: dev  MIDI event parser 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 Read byte and encode to sequencer event if finished.

void snd_midi_event_free (  snd_midi_event_t *    dev )

Free MIDI event parser. Parameters: rdev  MIDI event parser Returns: 0 on success otherwise a negative error code Frees MIDI event parser.

void snd_midi_event_init (  snd_midi_event_t *    dev )

Initializes MIDI parsers. Parameters: dev  MIDI event parser Returns: 0 on success otherwise a negative error code Initializes MIDI parsers (both encode and decode)

int snd_midi_event_new (  size_t    bufsize, snd_midi_event_t **    rdev )

Initialize MIDI event parser. Parameters: bufsize  buffer size for MIDI message rdev  allocated MIDI event parser Returns: 0 on success otherwise a negative error code Allocates and initializes MIDI event parser.

void snd_midi_event_no_status (  snd_midi_event_t *    dev, int    on )

Enable/disable MIDI command merging. Parameters: dev  MIDI event parser on  0 - enable MIDI command merging, 1 - always pass the command Enable/disable MIDI command merging

void snd_midi_event_reset_decode (  snd_midi_event_t *    dev )

Reset MIDI decode parser. Parameters: dev  MIDI event parser Returns: 0 on success otherwise a negative error code Resets MIDI decode parser

void snd_midi_event_reset_encode (  snd_midi_event_t *    dev )

Reset MIDI encode parser. Parameters: dev  MIDI event parser Returns: 0 on success otherwise a negative error code Resets MIDI encode parser

int snd_midi_event_resize_buffer (  snd_midi_event_t *    dev, size_t    bufsize )

Resize MIDI message (event) buffer. Parameters: dev  MIDI event parser bufsize  new requested buffer size Returns: 0 on success otherwise a negative error code Resizes MIDI message (event) buffer.

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