MMTIME

The MMTIME structure contains timing information for different types of multimedia data.

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. It can be one of the following values:

Format	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		SMPTE (Society of Motion Picture and Television Engineers) 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.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in mmsystem.h.

See Also

Multimedia Timers Overview, Multimedia Timer Structures