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_KSDATAFORMAT_TYPE_AUDIO   KSDATAFORMAT_TYPE_AUDIO
#define	pa_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT   KSDATAFORMAT_SUBTYPE_IEEE_FLOAT
#define	pa_KSDATAFORMAT_SUBTYPE_PCM   KSDATAFORMAT_SUBTYPE_PCM
#define	pa_KSDATAFORMAT_SUBTYPE_WAVEFORMATEX   KSDATAFORMAT_SUBTYPE_WAVEFORMATEX
#define	pa_KSMEDIUMSETID_Standard   KSMEDIUMSETID_Standard
#define	pa_KSINTERFACESETID_Standard   KSINTERFACESETID_Standard
#define	pa_KSPROPSETID_Pin   KSPROPSETID_Pin
#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 pa_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT   KSDATAFORMAT_SUBTYPE_IEEE_FLOAT

Referenced by PaWin_WDMKS_QueryFilterMaximumChannelCount().

#define pa_KSDATAFORMAT_SUBTYPE_PCM   KSDATAFORMAT_SUBTYPE_PCM

Referenced by PaWin_WDMKS_QueryFilterMaximumChannelCount().

#define pa_KSDATAFORMAT_SUBTYPE_WAVEFORMATEX   KSDATAFORMAT_SUBTYPE_WAVEFORMATEX

#define pa_KSDATAFORMAT_TYPE_AUDIO   KSDATAFORMAT_TYPE_AUDIO

Referenced by PaWin_WDMKS_QueryFilterMaximumChannelCount().

#define pa_KSINTERFACESETID_Standard   KSINTERFACESETID_Standard

Referenced by PaWin_WDMKS_QueryFilterMaximumChannelCount().

#define pa_KSMEDIUMSETID_Standard   KSMEDIUMSETID_Standard

Referenced by PaWin_WDMKS_QueryFilterMaximumChannelCount().

#define pa_KSPROPSETID_Pin   KSPROPSETID_Pin

#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. Declard 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 KSMULTIPLE_ITEM::Count, KSDATAFORMAT::FormatSize, HANDLE(), KSDATAFORMAT_SUBTYPE_WILDCARD, KSINTERFACE_STANDARD_LOOPED_STREAMING, KSINTERFACE_STANDARD_STREAMING, KSMEDIUM_STANDARD_DEVIO, KSPIN_COMMUNICATION_BOTH, KSPIN_COMMUNICATION_SINK, KSPIN_DATAFLOW_IN, KSPIN_DATAFLOW_OUT, KSPROPERTY_PIN_DATARANGES, KSPROPERTY_PIN_INTERFACES, KSPROPERTY_PIN_MEDIUMS, KSDATAFORMAT::MajorFormat, KSDATARANGE_AUDIO::MaximumChannels, pa_IS_VALID_WAVEFORMATEX_GUID, pa_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, pa_KSDATAFORMAT_SUBTYPE_PCM, pa_KSDATAFORMAT_TYPE_AUDIO, pa_KSINTERFACESETID_Standard, pa_KSMEDIUMSETID_Standard, paNoError, PaUtil_FreeMemory(), and KSDATAFORMAT::SubFormat.