WAVEOUTCAPS (Windows CE 5.0)
This structure describes the capabilities of a waveform-audio output device.
typedef struct {WORD wMid; WORD wPid; MMVERSION vDriverVersion; CHAR szPname[MAXPNAMELEN]; DWORD dwFormats; WORD wChannels; WORD wReserved1; DWORD dwSupport;} WAVEOUTCAPS;
Members
wMid
Manufacturer identifier for the device driver for the device.wPid
Product identifier for the device.vDriverVersion
Version number of the device driver for the device. The high-order byte is the major version number, and the low-order byte is the minor version number.szPname
Null-terminated string that contains the product name.The length of szPname is defined by the following macro in Mmsystem.h:
#define MAXPNAMELEN 32 /* max product name length (including NULL) */dwFormats
Specifies the standard formats that are supported. It is one or a combination of the following flags.Flag Description WAVE_FORMAT_1M08 11.025 kHz, mono, 8-bit WAVE_FORMAT_1M16 11.025 kHz, mono, 16-bit WAVE_FORMAT_1S08 11.025 kHz, stereo, 8-bit WAVE_FORMAT_1S16 11.025 kHz, stereo, 16-bit WAVE_FORMAT_2M08 22.05 kHz, mono, 8-bit WAVE_FORMAT_2M16 22.05 kHz, mono, 16-bit WAVE_FORMAT_2S08 22.05 kHz, stereo, 8-bit WAVE_FORMAT_2S16 22.05 kHz, stereo, 16-bit WAVE_FORMAT_4M08 44.1 kHz, mono, 8-bit WAVE_FORMAT_4M16 44.1 kHz, mono, 16-bit WAVE_FORMAT_4S08 44.1 kHz, stereo, 8-bit WAVE_FORMAT_4S16 44.1 kHz, stereo, 16-bit wChannels
Number specifying whether the device supports mono (1) or stereo (2) output.wReserved1
Packing.dwSupport
Specifies the optional functionality supported by the device. The following table shows the possible values.Value Description WAVECAPS_LRVOLUME Supports separate left and right volume control. WAVECAPS_PITCH Supports pitch control. WAVECAPS_PLAYBACKRATE Supports playback rate control. WAVECAPS_VOLUME Supports volume control. WAVECAPS_SAMPLEACCURATE Returns sample-accurate position information.
Remarks
If a device supports volume changes, the WAVECAPS_VOLUME flag is set for the dwSupport member. If a device supports separate volume changes on the left and right channels, both the WAVECAPS_VOLUME and the WAVECAPS_LRVOLUME flags are set for this member.
Manufacturer and product identifiers are used in Windows-based desktop systems to allow applications to determine which devices are installed on a host computer. Although these identifiers are supported in Windows CE, they are rarely needed or used because embedded devices typically have built-in devices with built-in drivers.
Requirements
OS Versions: Windows CE 2.0 and later.
Header: Mmsystem.h.
See Also
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