MMTIME (Windows Embedded CE 6.0)

1/6/2010

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

Syntax

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

See Also

Reference

Timer Driver Structures

Other Resources

Time Reference