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MMTIME

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Windows Embedded CE 6.0 R3

8/28/2008

This structure contains timing information for different types of multimedia data.

Syntax

Copy


typedef struct mmtime_tag {
  UINT wType; 
  union {
    DWORD ms; 
    DWORD sample; 
    DWORD cb; 
    DWORD ticks; 
    struct {
      BYTE hour; 
      BYTE min; 
      BYTE sec; 
      BYTE frame; 
      BYTE fps; 
      BYTE dummy; 
      BYTE pad[2]
    } smpte; 
    struct {
      DWORD songptrpos;
    } midi; 
  } u; 
} MMTIME;

Members

wType

Time format.

The following table shows the possible values for wType.

Value	Description
TIME_BYTES	Current byte offset from beginning of the file.
TIME_MIDI	MIDI time.
TIME_MS	Time in milliseconds.
TIME_SAMPLES	Number of waveform-audio samples.
TIME_SMPTE	Society of Motion Picture and Television Engineers (SMPTE) time.
TIME_TICKS	Ticks within a MIDI stream.

ms: Number of milliseconds. Used when wType is TIME_MS.

sample: Number of samples. Used when wType is TIME_SAMPLES.

cb: Byte count. Used when wType is TIME_BYTES.

ticks: Ticks in MIDI stream. Used when wType is TIME_TICKS.

smpte: SMPTE time structure. Used when wType is TIME_SMPTE.

songptrpos: Song pointer position.

midi: MIDI time structure. Used when wType is TIME_MIDI.

hour: Hours.

min: Minutes.

sec: Seconds.

frame: Frames.

fps: Frames per second: 24, 25, 29 (30 drop), or 30.

dummy: Dummy byte for alignment.

pad: Padding.

Requirements

Header	mmsystem.h
Windows Embedded CE	Windows CE 2.0 and later
Windows Mobile	Windows Mobile Version 5.0 and later

Other Resources

Time Reference

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