Waveform Capture: (3) "Capture device" performance

Call the Idirectsoundcapture8::getcaps method to obtain the performance of the capture device. The parameter of this method is a pointer to the DSCCAPS structure. Just like any other struct, you must initialize the dwsize member before passing this parameter. When returned, this structure contains the number of channels supported by the device, a set of formatted datasets supported by a set of devices, equivalent to the values in the WAVEINCAPS structure used in the Win32 WAV audio function.

In the absence of WDM drivers, only one application can use the capture device at the same time. If the driver supports multiple applications concurrent use of the device, the dwflags member in Dsccaps returns Dsccaps_multiplecapture. Each application can set its own format for the capture buffer.