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WAVEFORMAT_MIDI

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The WAVEFORMAT_MIDI structure provides the ability to play MIDI files over Windows Mobile-based devices. This structure inputs MIDI information as a special WAV format.

Syntax

typedef struct _WAVEFORMAT_MIDI {
  WAVEFORMATEX wfx;
  UINT32 USecPerQuarterNote;
  UINT32 TicksPerQuarterNote;
} WAVEFORMAT_MIDI, *LPWAVEFORMAT_MIDI;

Members

  • wfx
    A standard WAVEFORMATEX structure that most wave formats use. Within this structure, to allow MIDI playback, you must specify the values described in the following table.

    Value Description
    wFormatTag WAVE_FORMAT_MIDI
    nBlockAlign sizeof(WAVEFORMAT_MIDI_MESSAGE)
    cbSize WAVEFORMAT_MIDI_EXTRASIZE

  • USecPerQuarterNote
    Microseconds per quarter note of a MIDI file. This parameter helps set the tempo of a MIDI file during playback and works in conjunction with TicksPerQuarterNote to determine how fast a MIDI file plays. If set to 0, the member assumes a value of 500,000 milliseconds (or ½ second per quarter note).

  • TicksPerQuarterNote
    Ticks per quarter note of a MIDI file. This parameter helps set the tempo of a MIDI file during playback and works in conjunction with USecPerQuarterNote to determine how fast a MIDI file plays. If set to 0, the member assumes a value of 96 ticks per quarter note.

Requirements

Smartphone: Windows Mobile 2002 and later
OS Versions: Windows CE 3.0 and later
Header: wfmtmidi.h

See Also

WAVEFORMAT_MIDI_MESSAGE

Last updated on Friday, April 22, 2005

© 2005 Microsoft Corporation. All rights reserved.

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