pa_win_wdmks_utils.c File Reference

#include <windows.h>
#include <mmreg.h>
#include <winioctl.h>
#include <ks.h>
#include <ksmedia.h>
#include <stdio.h>
#include "portaudio.h"
#include "pa_util.h"
#include "pa_win_wdmks_utils.h"

Macros
#define	WAVE_FORMAT_IEEE_FLOAT   0x0003
#define	_WAVEFORMATEXTENSIBLE_
#define	_INC_MMREG
#define	pa_IS_VALID_WAVEFORMATEX_GUID(Guid)   (!memcmp(((PUSHORT)&pa_KSDATAFORMAT_SUBTYPE_WAVEFORMATEX) + 1, ((PUSHORT)(Guid)) + 1, sizeof(GUID) - sizeof(USHORT)))

Functions
int	PaWin_WDMKS_QueryFilterMaximumChannelCount (void *wcharDevicePath, int isInput)

Macro Definition Documentation

#define _INC_MMREG

#define _WAVEFORMATEXTENSIBLE_

#define pa_IS_VALID_WAVEFORMATEX_GUID

(

Guid

)

(!memcmp(((PUSHORT)&pa_KSDATAFORMAT_SUBTYPE_WAVEFORMATEX) + 1, ((PUSHORT)(Guid)) + 1, sizeof(GUID) - sizeof(USHORT)))

Referenced by PaWin_WDMKS_QueryFilterMaximumChannelCount().

#define WAVE_FORMAT_IEEE_FLOAT   0x0003

Function Documentation

int PaWin_WDMKS_QueryFilterMaximumChannelCount	(	void *	wcharDevicePath,
		int	isInput
	)

Query for the maximum number of channels supported by any pin of the specified device. Returns 0 if the query fails for any reason.

Parameters

wcharDevicePath	A system level PnP interface path, supplied as a WCHAR unicode string. Declared as void* to avoid introducing a dependency on wchar_t here.
isInput	A flag specifying whether to query for input (non-zero) or output (zero) channels.

References HANDLE(), pa_IS_VALID_WAVEFORMATEX_GUID, paNoError, and PaUtil_FreeMemory().