|
waveOutGetPlaybackRate
The waveOutGetPlaybackRate function retrieves the current playback rate for the specified waveform-audio
output device.
MMRESULT waveOutGetPlaybackRate(
HWAVEOUT hwo,
|
| LPDWORD pdwRate
|
| );
|
|
Parameters
hwo
Handle of the waveform-audio output device.
pdwRate
Address of 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.
Return Values
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error
values include the following:
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 isn't supported.
|
Remarks
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).
See Also
WAVEOUTCAPS, waveOutGetDevCaps
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
