WAVEOUTCAPS
The WAVEOUTCAPS structure describes the capabilities of a waveform-audio output device.
typedef struct {
WORD wMid;
WORD wPid;
MMVERSION vDriverVersion;
TCHAR szPname[MAXPNAMELEN];
DWORD dwFormats;
WORD wChannels;
WORD wReserved1;
DWORD dwSupport;
} WAVEOUTCAPS;
Members
wMid
Manufacturer identifier for the device driver for the device. Manufacturer identifiers are defined in Manufacturer and Product Identifiers.
wPid
Product identifier for the device. Product identifiers are defined in Manufacturer and Product Identifiers.
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
Product name in a null-terminated string.
dwFormats
Standard formats that are supported. Can be a combination of the following:
| Format | 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 |
| WAVE_FORMAT_48M08 | 48 kHz, mono, 8-bit |
| WAVE_FORMAT_48S08 | 48 kHz, stereo, 8-bi |
| WAVE_FORMAT_48M16 | 48 kHz, mono, 16-bit |
| WAVE_FORMAT_48S16 | 48 kHz, stereo, 16-bit |
| WAVE_FORMAT_96M08 | 96 kHz, mono, 8-bit |
| WAVE_FORMAT_96S08 | 96 kHz, stereo, 8-bit |
| WAVE_FORMAT_96M16 | 96 kHz, mono, 16-bit |
| WAVE_FORMAT_96S16 | 96 kHz, stereo, 16-bit |
wChannels
Number specifying whether the device supports mono (1) or stereo (2) output.
wReserved1
Packing.
dwSupport
Optional functionality supported by the device. The following values are defined:
| Flag | Description |
| WAVECAPS_LRVOLUME | Supports separate left and right volume control. |
| WAVECAPS_PITCH | Supports pitch control. |
| WAVECAPS_PLAYBACKRATE | Supports playback rate control. |
| WAVECAPS_SYNC | The driver is synchronous and will block while playing a buffer. |
| WAVECAPS_VOLUME | Supports volume control. |
| WAVECAPS_SAMPLEACCURATE | Returns sample-accurate position information. |
Remarks
If a device supports volume changes, the WAVECAPS_VOLUME flag will be 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 will be set for this member.
Requirements
** Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
** Windows 95/98/Me:** Included in Windows 95 and later.
** Header:** Declared in Mmsystem.h; include Windows.h.
** Unicode:** Declared as Unicode and ANSI structures.
See Also