Portaudio WDM-KS host API. More...

#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <wchar.h>
#include "pa_util.h"
#include "pa_allocation.h"
#include "pa_hostapi.h"
#include "pa_stream.h"
#include "pa_cpuload.h"
#include "pa_process.h"
#include "portaudio.h"
#include "pa_debugprint.h"
#include "pa_memorybarrier.h"
#include "pa_ringbuffer.h"
#include "pa_trace.h"
#include "pa_win_waveformat.h"
#include "pa_win_version.h"
#include "pa_win_wdmks.h"
#include <windows.h>
#include <winioctl.h>
#include <process.h>
#include <math.h>
#include <setupapi.h>
#include <mmreg.h>
#include <ks.h>
#include <ksmedia.h>

Data Structures
struct	PaWinWDMKSAvRtEntryPoints

struct	__PaWinWdmMuxedInput

struct	__PaWinWdmPin

struct	__PaWinWdmFilter

struct	__PaWinWdmDeviceInfo

struct	__PaWinWdmHostApiRepresentation

struct	__DATAPACKET

struct	__PaIOPacket

struct	__PaWinWdmIOInfo

struct	__PaWinWdmStream

struct	__PaProcessThreadInfo

struct	__PaWinWDMScanDeviceInfosResults

struct	__PaUsbTerminalGUIDToName

struct	PaNameHashIndex

struct	PaNameHashObject

Macros
#define	PA_LOGE_

#define	PA_LOGL_

#define	DRV_QUERYDEVICEINTERFACE (DRV_RESERVED + 12)

#define	DRV_QUERYDEVICEINTERFACESIZE (DRV_RESERVED + 13)

#define	PA_HP_TRACE(x)

#define	PA_WDMKS_USE_CATEGORY_FOR_PIN_NAMES 1

#define	CREATE_THREAD_FUNCTION (HANDLE)_beginthreadex

#define	PA_THREAD_FUNC static unsigned WINAPI

#define	EXTERN_C extern

#define	MAXIMUM_NUMBER_OF_CHANNELS 256

Typedefs
typedef DWORD WINAPI	KSCREATEPIN(HANDLE, PKSPIN_CONNECT, ACCESS_MASK, PHANDLE)

typedef enum _PA_AVRT_PRIORITY	PA_AVRT_PRIORITY

typedef enum _PA_AVRT_PRIORITY *	PPA_AVRT_PRIORITY

typedef struct __PaWinWdmFilter	PaWinWdmFilter

typedef struct __PaWinWdmPin	PaWinWdmPin

typedef struct __PaWinWdmStream	PaWinWdmStream

typedef PaError(*	FunctionGetPinAudioPosition) (PaWinWdmPin , unsigned long )

typedef void(*	FunctionMemoryBarrier) (void)

typedef struct __PaProcessThreadInfo	PaProcessThreadInfo

typedef PaError(*	FunctionPinHandler) (PaProcessThreadInfo *pInfo, unsigned eventIndex)

typedef enum __PaStreamStartEnum	PaStreamStartEnum

typedef struct __PaWinWdmMuxedInput	PaWinWdmMuxedInput

typedef struct __PaWinWdmDeviceInfo	PaWinWdmDeviceInfo

typedef struct __PaWinWdmHostApiRepresentation	PaWinWdmHostApiRepresentation

typedef struct __DATAPACKET	DATAPACKET

typedef struct __PaIOPacket	PaIOPacket

typedef struct __PaWinWdmIOInfo	PaWinWdmIOInfo

typedef struct __PaWinWDMScanDeviceInfosResults	PaWinWDMScanDeviceInfosResults

typedef const KSTOPOLOGY_CONNECTION (	TFnGetConnection) (const KSTOPOLOGY_CONNECTION , PaWinWdmFilter , int)

typedef struct __PaUsbTerminalGUIDToName	PaUsbTerminalGUIDToName

typedef enum _tag_EAlias	EAlias

typedef struct PaNameHashIndex	PaNameHashIndex

typedef struct PaNameHashObject	PaNameHashObject

typedef void(*	TSetInputFrameCount) (PaUtilBufferProcessor *, unsigned long)

typedef void(*	TSetInputChannel) (PaUtilBufferProcessor , unsigned int, void , unsigned int)

Enumerations
enum	_PA_AVRT_PRIORITY { PA_AVRT_PRIORITY_LOW = -1 , PA_AVRT_PRIORITY_NORMAL , PA_AVRT_PRIORITY_HIGH , PA_AVRT_PRIORITY_CRITICAL }

enum	__PaStreamStartEnum { StreamStart_kOk , StreamStart_kFailed , StreamStart_kCnt }

enum	_tag_EAlias { Alias_kRender = (1<<0) , Alias_kCapture = (1<<1) , Alias_kRealtime = (1<<2) }

Functions
PaError	PaWinWdm_Initialize (PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index)

PA_THREAD_FUNC	ProcessingThread (void *)

Variables
HMODULE	DllKsUser = NULL

KSCREATEPIN *	FunctionKsCreatePin = NULL

Detailed Description

Portaudio WDM-KS host API.

Note: This is the implementation of the Portaudio host API using the Windows WDM/Kernel Streaming API in order to enable very low latency playback and recording on all modern Windows platforms (e.g. 2K, XP, Vista, Win7) Note: This API accesses the device drivers below the usual KMIXER component which is normally used to enable multi-client mixing and format conversion. That means that it will lock out all other users of a device for the duration of active stream using those devices