waveOutGetPlaybackRate (Windows CE 5.0)
This function queries the current playback rate setting of a waveform output device.
MMRESULT waveOutGetPlaybackRate(HWAVEOUThwo,LPDWORDpdwRate );
Handle to the waveform-audio output device.
Pointer to a variable to be filled with the current playback rate. The playback rate setting is a multiplier indicating the current change in playback rate from the original authored setting. The playback rate multiplier must be a positive value.
The rate is specified as a fixed-point value. The high-order word of the variable contains the signed integer part of the number, and the low-order word contains the fractional part. A value of 0x8000 in the low-order word represents one-half, and 0x4000 represents one-quarter. For example, the value 0x00010000 specifies a multiplier of 1.0 (no playback rate change), and a value of 0x000F8000 specifies a multiplier of 15.5.
One of the values described in the following table is returned.
|MMSYSERR_INVALHANDLE||Specified device handle is invalid.|
|MMSYSERR_NODRIVER||No device driver is present.|
|MMSYSERR_NOMEM||Unable to allocate or lock memory.|
|MMSYSERR_NOTSUPPORTED||Function is not supported.|
Changing the playback rate does not change the sample rate but does change the playback time. Not all devices support playback rate changes. To determine whether a device supports playback rate changes, use the WAVECAPS_PLAYBACKRATE flag to test the dwSupport member of the WAVEOUTCAPS structure (filled by the waveOutGetDevCaps function).
OS Versions: Windows CE 2.0 and later.
Link Library: Coredll.lib.
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