MidiFreeBuffer

BOOL WINAPI MidiFreeBuffer
(
	LPVOID lpBuffer
);

This function deallocates a buffer created by MidiFilterTrackEvents or a buffer returned by MidiGet, MidiTrackGet and MidiEventGet when these functions are requested for buffers.

Parameters

• lpBuffer: pointer to the buffer to be deallocated.

Return values

Returns TRUE if the buffer was deallocated or FALSE if not. After the deallocation, do not make calls using that buffer.

Remarks

MidiFilterTrackEvents always requires a call to this function. Some data returned by MidiGet, MidiTrackGet and MidiEventGet require this call as well.

The following example shows common situations when MidiFreeBuffer is necessary:

Example

HANDLE Sequence;
LPBRELS_MIDI_HEADER lpbmh;
LPBRELS_TRACK_HEADER lpbth;
LPBYTE lpEventData;
LPBYTE lpTrackData;

// Open the sequence
MidiOpen("test1.mid", NO_DEVICE, &Sequence);

// Midi header
lpbmh = (LPBRELS_MIDI_HEADER) MidiGet(Sequence, MIDI_HEADER);

// Track data
lpTrackData = (LPBYTE) MidiTrackGet(Sequence, 0, TRACK_DATA);

// Track header
lpbth = (LPBRELS_TRACK_HEADER) MidiTrackGet(Sequence, 0, TRACK_HEADER);

// Event data
lpEventData = (LPBYTE) MidiEventGet(Sequence, 0, 0, EVENT_DATA);

// Deallocate the created buffers
MidiFreeBuffer(lpbmh);
MidiFreeBuffer(lpTrackData);
MidiFreeBuffer(lpbth);
MidiFreeBuffer(lpEventData);

// Close the sequence
MidiClose(Sequence);

Further information

Released in November 19th, 2003
Updated in April 29th, 2004
Property of Breno de Lima Sarmento
Home page: http://www27.brinkster.com/brels
E-mail: [email protected]
ICQ: 78977999 ()