pa_win_wasapi.c File Reference

WASAPI implementation of support for a host API. More...

#include <windows.h>
#include <stddef.h>
#include <stdio.h>
#include <process.h>
#include <assert.h>
#include <mmreg.h>
#include <malloc.h>
#include <memory.h>
#include <mmsystem.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 "pa_debugprint.h"
#include "pa_ringbuffer.h"
#include "pa_win_version.h"
#include "pa_win_coinitialize.h"
#include "pa_win_wasapi.h"
#include <basetyps.h>
#include <rpcsal.h>
#include <sal.h>
#include <sdkddkver.h>
#include <propkeydef.h>
#include <audioclient.h>
#include <mmdeviceapi.h>
#include <endpointvolume.h>
#include <functiondiscoverykeys.h>
#include <devicetopology.h>

Data Structures
struct	_tagpropertykey
struct	_BYTE_BLOB
struct	WAVEFORMATEXTENSIBLE_IEC61937
union	_WAVEFORMATEXTENSIBLE_UNION
struct	SystemTimer
struct	PaWasapiDeviceInfo
struct	PaWasapiHostApiRepresentation
struct	PaWasapiAudioClientParams
struct	PaWasapiSubStream
struct	PaWasapiHostProcessor
struct	PaWasapiStream
struct	ThreadIdleScheduler

Macros
#define	PA_WASAPI_MAX_CONST_DEVICE_COUNT   0
#define	WINVER   0x0600
	Poll mode time slots logging. More...
#define	_WIN32_WINNT   WINVER
#define	WINAPI   __stdcall
#define	__unaligned
#define	__C89_NAMELESS
#define	__LPCGUID_DEFINED__
#define	PROPERTYKEY_DEFINED
#define	__MIDL_CONST   const
#define	NONAMELESSUNION
#define	WAVE_FORMAT_IEEE_FLOAT   0x0003
#define	__MINGW_EXTENSION
#define	COBJMACROS
#define	INITGUID
#define	GUID_SECT
#define	__DEFINE_GUID(n, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)   static const GUID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}
#define	__DEFINE_IID(n, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)   static const IID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}
#define	__DEFINE_CLSID(n, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)   static const CLSID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}
#define	PA_DEFINE_CLSID(className, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)   __DEFINE_CLSID(pa_CLSID_##className, 0x##l, 0x##w1, 0x##w2, 0x##b1, 0x##b2, 0x##b3, 0x##b4, 0x##b5, 0x##b6, 0x##b7, 0x##b8)
#define	PA_DEFINE_IID(interfaceName, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8)   __DEFINE_IID(pa_IID_##interfaceName, 0x##l, 0x##w1, 0x##w2, 0x##b1, 0x##b2, 0x##b3, 0x##b4, 0x##b5, 0x##b6, 0x##b7, 0x##b8)
#define	_WAVEFORMATEXTENSIBLE_IEC61937_
#define	CREATE_THREAD(PROC)   (HANDLE)_beginthreadex( NULL, 0, (PROC), stream, 0, &stream->dwThreadId )
#define	PA_THREAD_FUNC   static unsigned WINAPI
#define	PA_THREAD_ID   unsigned
#define	AUDCLNT_E_BUFFER_ERROR   AUDCLNT_ERR(0x018)
#define	AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED   AUDCLNT_ERR(0x019)
#define	AUDCLNT_E_INVALID_DEVICE_PERIOD   AUDCLNT_ERR(0x020)
#define	AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY   0x08000000
#define	AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM   0x80000000
#define	PA_WASAPI_DEVICE_ID_LEN   256
#define	PA_WASAPI_DEVICE_NAME_LEN   128
#define	STATIC_ARRAY_SIZE(array)   (sizeof(array)/sizeof(array[0]))
#define	PRINT(x)   PA_DEBUG(x);
#define	PA_SKELETON_SET_LAST_HOST_ERROR(errorCode, errorText)   PaUtil_SetLastHostErrorInfo( paWASAPI, errorCode, errorText )
#define	PA_WASAPI__IS_FULLDUPLEX(STREAM)   ((STREAM)->in.clientProc && (STREAM)->out.clientProc)
#define	IF_FAILED_JUMP(hr, label)   if(FAILED(hr)) goto label;
#define	IF_FAILED_INTERNAL_ERROR_JUMP(hr, error, label)   if(FAILED(hr)) { error = paInternalError; goto label; }
#define	SAFE_CLOSE(h)   if ((h) != NULL) { CloseHandle((h)); (h) = NULL; }
#define	SAFE_RELEASE(punk)   if ((punk) != NULL) { (punk)->lpVtbl->Release((punk)); (punk) = NULL; }
#define	SAFE_ADDREF(punk)   if ((punk) != NULL) { (punk)->lpVtbl->AddRef((punk)); }
#define	_GetProc(fun, type, name)
#define	LogHostError(HRES)   __LogHostError(HRES, __FUNCTION__, __FILE__, __LINE__)
#define	LogPaError(PAERR)   __LogPaError(PAERR, __FUNCTION__, __FILE__, __LINE__)
#define	HDA_PACKET_SIZE   (128)
#define	REFTIMES_PER_SEC   10000000LL
#define	REFTIMES_PER_MILLISEC   10000LL
#define	REFTIMES_PER_SEC   10000000LL
#define	REFTIMES_PER_MILLISEC   10000LL
#define	_WASAPI_MONO_TO_STEREO_MIXER_1_TO_2(TYPE)
#define	_WASAPI_MONO_TO_STEREO_MIXER_2_TO_1_FLT32(TYPE)
#define	_WASAPI_MONO_TO_STEREO_MIXER_2_TO_1_INT32(TYPE)
#define	_WASAPI_MONO_TO_STEREO_MIXER_2_TO_1_INT64(TYPE)
#define	_WASAPI_MONO_TO_STEREO_MIXER_2_TO_1_L(TYPE)
#define	PA_WASAPI_LOOPBACK_NAME_IDENTIFICATOR   "[Loopback]"

Typedefs
typedef enum _AVRT_PRIORITY	AVRT_PRIORITY
typedef enum _AVRT_PRIORITY *	PAVRT_PRIORITY
typedef const GUID *	LPCGUID
typedef GUID	IID
typedef GUID	CLSID
typedef struct _tagpropertykey	PROPERTYKEY
typedef struct _BYTE_BLOB	BYTE_BLOB
typedef __RPC_unique_pointer BYTE_BLOB *	UP_BYTE_BLOB
typedef LONGLONG	REFERENCE_TIME
typedef LONG	NTSTATUS
typedef struct WAVEFORMATEXTENSIBLE_IEC61937 *	PWAVEFORMATEXTENSIBLE_IEC61937
typedef union _WAVEFORMATEXTENSIBLE_UNION	WAVEFORMATEXTENSIBLE_UNION
typedef struct SystemTimer	SystemTimer
typedef void(*	MixMonoToStereoF )(void *__to, const void *__from, UINT32 count)
typedef GUID	PLARGE_INTEGER
typedef BOOL(WINAPI *	FAvRevertMmThreadCharacteristics )(HANDLE)
typedef struct PaWasapiDeviceInfo	PaWasapiDeviceInfo
typedef struct PaWasapiHostApiRepresentation	PaWasapiHostApiRepresentation
typedef struct PaWasapiAudioClientParams	PaWasapiAudioClientParams
typedef struct PaWasapiSubStream	PaWasapiSubStream
typedef struct PaWasapiHostProcessor	PaWasapiHostProcessor
typedef struct PaWasapiStream	PaWasapiStream
typedef struct ThreadIdleScheduler	ThreadIdleScheduler
typedef UINT32(*	ALIGN_FUNC )(UINT32 v, UINT32 align)
typedef enum EMixDirection	EMixDirection

Enumerations
enum	_AVRT_PRIORITY { AVRT_PRIORITY_LOW = -1, AVRT_PRIORITY_NORMAL, AVRT_PRIORITY_HIGH, AVRT_PRIORITY_CRITICAL }
enum	{ S_INPUT = 0, S_OUTPUT = 1, S_COUNT = 2, S_FULLDUPLEX = 0 }
enum	{ WASAPI_PACKETS_PER_INPUT_BUFFER = 6 }
enum	EMixDirection { MIX_DIR__1TO2, MIX_DIR__2TO1, MIX_DIR__2TO1_L }

Functions
	PA_DEFINE_IID (IAudioClient, 1cb9ad4c, dbfa, 4c32, b1, 78, c2, f5, 68, a7, 03, b2)
	PA_DEFINE_IID (IAudioClient2, 726778cd, f60a, 4eda, 82, de, e4, 76, 10, cd, 78, aa)
	PA_DEFINE_IID (IAudioClient3, 7ed4ee07, 8e67, 4cd4, 8c, 1a, 2b, 7a, 59, 87, ad, 42)
	PA_DEFINE_IID (IMMEndpoint, 1be09788, 6894, 4089, 85, 86, 9a, 2a, 6c, 26, 5a, c5)
	PA_DEFINE_IID (IMMDeviceEnumerator, a95664d2, 9614, 4f35, a7, 46, de, 8d, b6, 36, 17, e6)
	PA_DEFINE_CLSID (IMMDeviceEnumerator, bcde0395, e52f, 467c, 8e, 3d, c4, 57, 92, 91, 69, 2e)
	PA_DEFINE_IID (IAudioRenderClient, f294acfc, 3146, 4483, a7, bf, ad, dc, a7, c2, 60, e2)
	PA_DEFINE_IID (IAudioCaptureClient, c8adbd64, e71e, 48a0, a4, de, 18, 5c, 39, 5c, d3, 17)
	PA_DEFINE_IID (IDeviceTopology, 2A07407E, 6497, 4A18, 97, 87, 32, f7, 9b, d0, d9, 8f)
	PA_DEFINE_IID (IPart, AE2DE0E4, 5BCA, 4F2D, aa, 46, 5d, 13, f8, fd, b3, a9)
	PA_DEFINE_IID (IKsJackDescription, 4509F757, 2D46, 4637, 8e, 62, ce, 7d, b9, 44, f5, 7b)
	__DEFINE_GUID (pa_KSDATAFORMAT_SUBTYPE_PCM, 0x00000001, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71)
	__DEFINE_GUID (pa_KSDATAFORMAT_SUBTYPE_ADPCM, 0x00000002, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71)
	__DEFINE_GUID (pa_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, 0x00000003, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71)
	__DEFINE_GUID (pa_KSDATAFORMAT_SUBTYPE_IEC61937_PCM, 0x00000000, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71)
PA_THREAD_FUNC	ProcThreadEvent (void *param)
PA_THREAD_FUNC	ProcThreadPoll (void *param)
typedef	BOOL (WINAPI *FAvRtCreateThreadOrderingGroup)(PHANDLE
typedef	HANDLE (WINAPI *FAvSetMmThreadCharacteristics)(LPCSTR
PaError	PaWasapi_Initialize (PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index)
PaError	PaWasapi_UpdateDeviceList ()
int	PaWasapi_GetDeviceCurrentFormat (PaStream *pStream, void *pFormat, unsigned int formatSize, int bOutput)
int	PaWasapi_GetDeviceDefaultFormat (void *pFormat, unsigned int formatSize, PaDeviceIndex device)
int	PaWasapi_GetDeviceMixFormat (void *pFormat, unsigned int formatSize, PaDeviceIndex device)
int	PaWasapi_GetDeviceRole (PaDeviceIndex device)
PaError	PaWasapi_GetIMMDevice (PaDeviceIndex device, void **pIMMDevice)
int	PaWasapi_IsLoopback (PaDeviceIndex device)
PaError	PaWasapi_GetFramesPerHostBuffer (PaStream *pStream, unsigned int *pInput, unsigned int *pOutput)
unsigned long	PaUtil_GetOutputFrameCount (PaUtilBufferProcessor *bp)
PaError	PaWasapi_ThreadPriorityBoost (void **pTask, PaWasapiThreadPriority priorityClass)
PaError	PaWasapi_ThreadPriorityRevert (void *pTask)
PaError	PaWasapi_GetJackCount (PaDeviceIndex device, int *pJackCount)
PaError	PaWasapi_GetJackDescription (PaDeviceIndex device, int jackIndex, PaWasapiJackDescription *pJackDescription)
PaError	PaWasapi_GetAudioClient (PaStream *pStream, void **pAudioClient, int bOutput)
PaError	PaWasapiWinrt_SetDefaultDeviceId (const unsigned short *pId, int bOutput)
PaError	PaWasapiWinrt_PopulateDeviceList (const unsigned short **pId, const unsigned short **pName, const PaWasapiDeviceRole *pRole, unsigned int count, int bOutput)
PaError	PaWasapi_SetStreamStateHandler (PaStream *pStream, PaWasapiStreamStateCallback fnStateHandler, void *pUserData)

Variables
typedef	LPDWORD
FAvRtCreateThreadOrderingGroup	pAvRtCreateThreadOrderingGroup = NULL
FAvRtDeleteThreadOrderingGroup	pAvRtDeleteThreadOrderingGroup = NULL
FAvRtWaitOnThreadOrderingGroup	pAvRtWaitOnThreadOrderingGroup = NULL
FAvSetMmThreadCharacteristics	pAvSetMmThreadCharacteristics = NULL
FAvRevertMmThreadCharacteristics	pAvRevertMmThreadCharacteristics = NULL
FAvSetMmThreadPriority	pAvSetMmThreadPriority = NULL

Detailed Description

WASAPI implementation of support for a host API.

Note

pa_wasapi currently requires minimum VC 2005, and the latest Vista SDK

Macro Definition Documentation

#define __C89_NAMELESS

#define __DEFINE_CLSID	(		n,
			l,
			w1,
			w2,
			b1,
			b2,
			b3,
			b4,
			b5,
			b6,
			b7,
			b8
	)		static const CLSID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}

#define __DEFINE_GUID	(		n,
			l,
			w1,
			w2,
			b1,
			b2,
			b3,
			b4,
			b5,
			b6,
			b7,
			b8
	)		static const GUID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}

#define __DEFINE_IID	(		n,
			l,
			w1,
			w2,
			b1,
			b2,
			b3,
			b4,
			b5,
			b6,
			b7,
			b8
	)		static const IID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}

#define __LPCGUID_DEFINED__

#define __MIDL_CONST   const

#define __MINGW_EXTENSION

#define __unaligned

#define _GetProc	(		fun,
			type,
			name
	)

Value:

{                                                        \
                                        fun = (type) GetProcAddress(hDInputDLL,name);       \
                                        if (fun == NULL) {                                  \
                                            PRINT(("GetProcAddr failed for %s" ,name));     \
                                            return FALSE;                                   \
                                        }                                                   \
                                    }                                                       \

#define _WASAPI_MONO_TO_STEREO_MIXER_1_TO_2

(

TYPE

)

Value:

TYPE * __restrict to = (TYPE *)__to;\
    const TYPE * __restrict from = (const TYPE *)__from;\
    const TYPE * __restrict end = from + count;\
    while (from != end)\
    {\
        to[0] = to[1] = *from ++;\
        to += 2;\
    }

#define _WASAPI_MONO_TO_STEREO_MIXER_2_TO_1_FLT32

(

TYPE

)

Value:

TYPE * __restrict to = (TYPE *)__to;\
    const TYPE * __restrict from = (const TYPE *)__from;\
    const TYPE * __restrict end = to + count;\
    while (to != end)\
    {\
        *to ++ = (TYPE)((float)(from[0] + from[1]) * 0.5f);\
        from += 2;\
    }

#define _WASAPI_MONO_TO_STEREO_MIXER_2_TO_1_INT32

(

TYPE

)

Value:

TYPE * __restrict to = (TYPE *)__to;\
    const TYPE * __restrict from = (const TYPE *)__from;\
    const TYPE * __restrict end = to + count;\
    while (to != end)\
    {\
        *to ++ = (TYPE)(((INT32)from[0] + (INT32)from[1]) >> 1);\
        from += 2;\
    }

#define _WASAPI_MONO_TO_STEREO_MIXER_2_TO_1_INT64

(

TYPE

)

Value:

TYPE * __restrict to = (TYPE *)__to;\
    const TYPE * __restrict from = (const TYPE *)__from;\
    const TYPE * __restrict end = to + count;\
    while (to != end)\
    {\
        *to ++ = (TYPE)(((INT64)from[0] + (INT64)from[1]) >> 1);\
        from += 2;\
    }

#define _WASAPI_MONO_TO_STEREO_MIXER_2_TO_1_L

(

TYPE

)

Value:

TYPE * __restrict to = (TYPE *)__to;\
    const TYPE * __restrict from = (const TYPE *)__from;\
    const TYPE * __restrict end = to + count;\
    while (to != end)\
    {\
        *to ++ = from[0];\
        from += 2;\
    }

#define _WAVEFORMATEXTENSIBLE_IEC61937_

#define _WIN32_WINNT   WINVER

#define AUDCLNT_E_BUFFER_ERROR   AUDCLNT_ERR(0x018)

#define AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED   AUDCLNT_ERR(0x019)

#define AUDCLNT_E_INVALID_DEVICE_PERIOD   AUDCLNT_ERR(0x020)

#define AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM   0x80000000

#define AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY   0x08000000

#define COBJMACROS

#define CREATE_THREAD

(

PROC

)

(HANDLE)_beginthreadex( NULL, 0, (PROC), stream, 0, &stream->dwThreadId )

#define GUID_SECT

#define HDA_PACKET_SIZE   (128)

#define IF_FAILED_INTERNAL_ERROR_JUMP	(		hr,
			error,
			label
	)		if(FAILED(hr)) { error = paInternalError; goto label; }

#define IF_FAILED_JUMP	(		hr,
			label
	)		if(FAILED(hr)) goto label;

Referenced by PaWasapi_GetJackCount(), and PaWasapi_GetJackDescription().

#define INITGUID

#define LogHostError

(

HRES

)

__LogHostError(HRES, __FUNCTION__, __FILE__, __LINE__)

Referenced by PaWasapi_GetJackCount(), PaWasapi_GetJackDescription(), ProcThreadEvent(), and ProcThreadPoll().

#define LogPaError

(

PAERR

)

__LogPaError(PAERR, __FUNCTION__, __FILE__, __LINE__)

#define NONAMELESSUNION

#define PA_DEFINE_CLSID	(		className,
			l,
			w1,
			w2,
			b1,
			b2,
			b3,
			b4,
			b5,
			b6,
			b7,
			b8
	)		__DEFINE_CLSID(pa_CLSID_##className, 0x##l, 0x##w1, 0x##w2, 0x##b1, 0x##b2, 0x##b3, 0x##b4, 0x##b5, 0x##b6, 0x##b7, 0x##b8)

#define PA_DEFINE_IID	(		interfaceName,
			l,
			w1,
			w2,
			b1,
			b2,
			b3,
			b4,
			b5,
			b6,
			b7,
			b8
	)		__DEFINE_IID(pa_IID_##interfaceName, 0x##l, 0x##w1, 0x##w2, 0x##b1, 0x##b2, 0x##b3, 0x##b4, 0x##b5, 0x##b6, 0x##b7, 0x##b8)

#define PA_SKELETON_SET_LAST_HOST_ERROR	(		errorCode,
			errorText
	)		PaUtil_SetLastHostErrorInfo( paWASAPI, errorCode, errorText )

#define PA_THREAD_FUNC   static unsigned WINAPI

#define PA_THREAD_ID   unsigned

#define PA_WASAPI__IS_FULLDUPLEX

(

STREAM

)

((STREAM)->in.clientProc && (STREAM)->out.clientProc)

Referenced by ProcThreadPoll().

#define PA_WASAPI_DEVICE_ID_LEN   256

Referenced by PaWasapiWinrt_PopulateDeviceList(), and PaWasapiWinrt_SetDefaultDeviceId().

#define PA_WASAPI_DEVICE_NAME_LEN   128

Referenced by PaWasapiWinrt_PopulateDeviceList().

#define PA_WASAPI_LOOPBACK_NAME_IDENTIFICATOR   "[Loopback]"

#define PA_WASAPI_MAX_CONST_DEVICE_COUNT   0

#define PRINT

(

x

)

PA_DEBUG(x);

Referenced by PaWasapi_Initialize(), and ProcThreadEvent().

#define PROPERTYKEY_DEFINED

#define REFTIMES_PER_MILLISEC   10000LL

#define REFTIMES_PER_MILLISEC   10000LL

#define REFTIMES_PER_SEC   10000000LL

#define REFTIMES_PER_SEC   10000000LL

#define SAFE_ADDREF

(

punk

)

if ((punk) != NULL) { (punk)->lpVtbl->AddRef((punk)); }

#define SAFE_CLOSE

(

h

)

if ((h) != NULL) { CloseHandle((h)); (h) = NULL; }

#define SAFE_RELEASE

(

punk

)

if ((punk) != NULL) { (punk)->lpVtbl->Release((punk)); (punk) = NULL; }

Referenced by PaWasapi_GetJackCount(), and PaWasapi_GetJackDescription().

#define STATIC_ARRAY_SIZE

(

array

)

(sizeof(array)/sizeof(array[0]))

Referenced by PaWasapiWinrt_PopulateDeviceList(), and PaWasapiWinrt_SetDefaultDeviceId().

#define WAVE_FORMAT_IEEE_FLOAT   0x0003

#define WINAPI   __stdcall

Referenced by PaWinDs_InitializeDSoundEntryPoints(), and PaWinWdm_Initialize().

#define WINVER   0x0600

Poll mode time slots logging.

Typedef Documentation

typedef UINT32(* ALIGN_FUNC)(UINT32 v, UINT32 align)

typedef AVRT_PRIORITY

typedef struct _BYTE_BLOB BYTE_BLOB

typedef GUID CLSID

typedef enum EMixDirection EMixDirection

typedef BOOL(WINAPI * FAvRevertMmThreadCharacteristics)(HANDLE)

typedef GUID IID

typedef const GUID* LPCGUID

typedef void(* MixMonoToStereoF)(void *__to, const void *__from, UINT32 count)

typedef LONG NTSTATUS

typedef enum _AVRT_PRIORITY * PAVRT_PRIORITY

typedef struct PaWasapiAudioClientParams PaWasapiAudioClientParams

typedef struct PaWasapiDeviceInfo PaWasapiDeviceInfo

typedef struct PaWasapiHostApiRepresentation PaWasapiHostApiRepresentation

typedef struct PaWasapiHostProcessor PaWasapiHostProcessor

typedef struct PaWasapiStream PaWasapiStream

typedef struct PaWasapiSubStream PaWasapiSubStream

typedef PLARGE_INTEGER

typedef struct _tagpropertykey PROPERTYKEY

typedef struct WAVEFORMATEXTENSIBLE_IEC61937 * PWAVEFORMATEXTENSIBLE_IEC61937

typedef LONGLONG REFERENCE_TIME

typedef struct SystemTimer SystemTimer

typedef struct ThreadIdleScheduler ThreadIdleScheduler

typedef __RPC_unique_pointer BYTE_BLOB* UP_BYTE_BLOB

typedef union _WAVEFORMATEXTENSIBLE_UNION WAVEFORMATEXTENSIBLE_UNION

Enumeration Type Documentation

anonymous enum

Enumerator
S_INPUT
S_OUTPUT
S_COUNT
S_FULLDUPLEX

anonymous enum

Enumerator
WASAPI_PACKETS_PER_INPUT_BUFFER

enum _AVRT_PRIORITY

Enumerator
AVRT_PRIORITY_LOW
AVRT_PRIORITY_NORMAL
AVRT_PRIORITY_HIGH
AVRT_PRIORITY_CRITICAL

enum EMixDirection

Enumerator
MIX_DIR__1TO2	mix one channel to L and R
MIX_DIR__2TO1	mix L and R channels to one channel
MIX_DIR__2TO1_L	mix only L channel (of total 2 channels) to one channel

Function Documentation

__DEFINE_GUID	(	pa_KSDATAFORMAT_SUBTYPE_PCM	,
		0x00000001	,
		0x0000	,
		0x0010	,
		0x80	,
		0x00	,
		0x00	,
		0xaa	,
		0x00	,
		0x38	,
		0x9b	,
		0x71
	)

__DEFINE_GUID	(	pa_KSDATAFORMAT_SUBTYPE_ADPCM	,
		0x00000002	,
		0x0000	,
		0x0010	,
		0x80	,
		0x00	,
		0x00	,
		0xaa	,
		0x00	,
		0x38	,
		0x9b	,
		0x71
	)

__DEFINE_GUID	(	pa_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT	,
		0x00000003	,
		0x0000	,
		0x0010	,
		0x80	,
		0x00	,
		0x00	,
		0xaa	,
		0x00	,
		0x38	,
		0x9b	,
		0x71
	)

__DEFINE_GUID	(	pa_KSDATAFORMAT_SUBTYPE_IEC61937_PCM	,
		0x00000000	,
		0x0000	,
		0x0010	,
		0x80	,
		0x00	,
		0x00	,
		0xaa	,
		0x00	,
		0x38	,
		0x9b	,
		0x71
	)

typedef BOOL

(

WINAPI *

FAvRtCreateThreadOrderingGroup

)

Referenced by PaWinWdm_Initialize(), ProcThreadEvent(), and ProcThreadPoll().

typedef HANDLE

(

WINAPI *

FAvSetMmThreadCharacteristics

)

Referenced by PaWasapi_ThreadPriorityBoost(), PaWin_WDMKS_QueryFilterMaximumChannelCount(), PaWinWdm_Initialize(), ProcessingThread(), and ProcessingThreadProc().

PA_DEFINE_CLSID	(	IMMDeviceEnumerator	,
		bcde0395	,
		e52f	,
		467c	,
		8e	,
		3d	,
		c4	,
		57	,
		92	,
		91	,
		69	,
		2e
	)

PA_DEFINE_IID	(	IAudioClient	,
		1cb9ad4c	,
		dbfa	,
		4c32	,
		b1	,
		78	,
		c2	,
		f5	,
		68	,
		a7	,
		03	,
		b2
	)

PA_DEFINE_IID	(	IAudioClient2	,
		726778cd	,
		f60a	,
		4eda	,
		82	,
		de	,
		e4	,
		76	,
		10	,
		cd	,
		78	,
		aa
	)

PA_DEFINE_IID	(	IAudioClient3	,
		7ed4ee07	,
		8e67	,
		4cd4	,
		8c	,
		1a	,
		2b	,
		7a	,
		59	,
		87	,
		ad	,
		42
	)

PA_DEFINE_IID	(	IMMEndpoint	,
		1be09788	,
		6894	,
		4089	,
		85	,
		86	,
		9a	,
		2a	,
		6c	,
		26	,
		5a	,
		c5
	)

PA_DEFINE_IID	(	IMMDeviceEnumerator	,
		a95664d2	,
		9614	,
		4f35	,
		a7	,
		46	,
		de	,
		8d	,
		b6	,
		36	,
		17	,
		e6
	)

PA_DEFINE_IID	(	IAudioRenderClient	,
		f294acfc	,
		3146	,
		4483	,
		a7	,
		bf	,
		ad	,
		dc	,
		a7	,
		c2	,
		60	,
		e2
	)

PA_DEFINE_IID	(	IAudioCaptureClient	,
		c8adbd64	,
		e71e	,
		48a0	,
		a4	,
		de	,
		18	,
		5c	,
		39	,
		5c	,
		d3	,
		17
	)

PA_DEFINE_IID	(	IDeviceTopology	,
		2A07407E	,
		6497	,
		4A18	,
		97	,
		87	,
		32	,
		f7	,
		9b	,
		d0	,
		d9	,
		8f
	)

PA_DEFINE_IID	(	IPart	,
		AE2DE0E4	,
		5BCA	,
		4F2D	,
		aa	,
		46	,
		5d	,
		13	,
		f8	,
		fd	,
		b3	,
		a9
	)

PA_DEFINE_IID	(	IKsJackDescription	,
		4509F757	,
		2D46	,
		4637	,
		8e	,
		62	,
		ce	,
		7d	,
		b9	,
		44	,
		f5	,
		7b
	)

unsigned long PaUtil_GetOutputFrameCount

(

PaUtilBufferProcessor *

bp

)

References PaUtilBufferProcessor::hostOutputFrameCount.

PaError PaWasapi_GetAudioClient	(	PaStream *	pStream,
		void **	pAudioClient,
		int	bOutput
	)

Returns pointer to WASAPI's IAudioClient object of the stream.

Parameters

pStream	Pointer to PaStream object.
pAudioClient	Pointer to pointer of IAudioClient.
bOutput	TRUE (1) for output stream, FALSE (0) for input stream.

Returns

Error code indicating success or failure.

References PaWasapiSubStream::clientParent, PaWasapiStream::in, PaWasapiStream::out, paBadStreamPtr, paNoError, paUnanticipatedHostError, and TRUE.

int PaWasapi_GetDeviceCurrentFormat	(	PaStream *	pStream,
		void *	pFormat,
		unsigned int	formatSize,
		int	bOutput
	)

Get current audio format of the device assigned to the opened stream.

Format is represented by PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure. Use this function to reconfirm format if PA's processor is overridden and paWinWasapiRedirectHostProcessor flag is specified.

Parameters

pStream	Pointer to PaStream object.
pFormat	Pointer to PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure.
formatSize	Size of PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure in bytes.
bOutput	TRUE (1) for output stream, FALSE (0) for input stream.

Returns

Non-negative value indicating the number of bytes copied into format descriptor or, a PaErrorCode (which is always negative) if PortAudio is not initialized or an error is encountered.

References _WAVEFORMATEXTENSIBLE_UNION::ext, PaWasapiStream::in, PaWasapiStream::out, paBadStreamPtr, TRUE, and PaWasapiSubStream::wavexu.

int PaWasapi_GetDeviceDefaultFormat	(	void *	pFormat,
		unsigned int	formatSize,
		PaDeviceIndex	device
	)

Get default audio format for the device in Shared Mode.

Format is represented by PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure and obtained by getting the device property with a PKEY_AudioEngine_DeviceFormat key.

Parameters

pFormat	Pointer to PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure.
formatSize	Size of PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure in bytes.
device	Device index.

Returns

Non-negative value indicating the number of bytes copied into format descriptor or, a PaErrorCode (which is always negative) if PortAudio is not initialized or an error is encountered.

References PaWasapiDeviceInfo::DefaultFormat, paBadBufferPtr, paBufferTooSmall, and paNoError.

int PaWasapi_GetDeviceMixFormat	(	void *	pFormat,
		unsigned int	formatSize,
		PaDeviceIndex	device
	)

Get mix audio format for the device in Shared Mode.

Format is represented by PaWinWaveFormat or WAVEFORMATEXTENSIBLE structureand obtained by IAudioClient::GetMixFormat.

Parameters

pFormat	Pointer to PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure.
formatSize	Size of PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure in bytes.
device	Device index.

Returns

Non-negative value indicating the number of bytes copied into format descriptor or, a PaErrorCode (which is always negative) if PortAudio is not initialized or an error is encountered.

References PaWasapiDeviceInfo::MixFormat, paBadBufferPtr, paBufferTooSmall, and paNoError.

int PaWasapi_GetDeviceRole

(

PaDeviceIndex

device

)

Get device role (PaWasapiDeviceRole enum).

Parameters

device

Device index.

Returns

Non-negative value indicating device role or, a PaErrorCode (which is always negative) if PortAudio is not initialized or an error is encountered.

References PaWasapiDeviceInfo::formFactor, and paNoError.

PaError PaWasapi_GetFramesPerHostBuffer	(	PaStream *	pStream,
		unsigned int *	pInput,
		unsigned int *	pOutput
	)

Get number of frames per host buffer.

It is max value of frames of WASAPI buffer which can be locked for operations. Use this method as helper to find out max values of inputFrames/outputFrames of PaWasapiHostProcessorCallback.

Parameters

pStream	Pointer to PaStream object.
pInput	Pointer to variable to receive number of input frames. Can be NULL.
pOutput	Pointer to variable to receive number of output frames. Can be NULL.

Returns

Error code indicating success or failure.

See Also

PaWasapiHostProcessorCallback

References PaWasapiSubStream::framesPerHostCallback, PaWasapiStream::in, PaWasapiStream::out, paBadStreamPtr, and paNoError.

PaError PaWasapi_GetIMMDevice	(	PaDeviceIndex	device,
		void **	pIMMDevice
	)

Get device IMMDevice pointer.

Parameters

device	Device index.
pAudioClient	Pointer to pointer of IMMDevice.

Returns

Error code indicating success or failure.

References PaWasapiDeviceInfo::device, paBadBufferPtr, paIncompatibleStreamHostApi, and paNoError.

PaError PaWasapi_GetJackCount	(	PaDeviceIndex	device,
		int *	pJackCount
	)

Get number of jacks associated with a WASAPI device.

Use this method to determine if there are any jacks associated with the provided WASAPI device. Not all audio devices will support this capability. This is valid for both input and output devices.

Note

Not available on UWP platform.

Parameters

device	Device index.
pJackCount	Pointer to variable to receive number of jacks.

Returns

Error code indicating success or failure.

See Also

PaWasapi_GetJackDescription

References PaWasapiDeviceInfo::device, IF_FAILED_JUMP, LogHostError, paNoError, paUnanticipatedHostError, and SAFE_RELEASE.

PaError PaWasapi_GetJackDescription	(	PaDeviceIndex	device,
		int	jackIndex,
		PaWasapiJackDescription *	pJackDescription
	)

Get the jack description associated with a WASAPI device and jack number.

Before this function is called, use PaWasapi_GetJackCount to determine the number of jacks associated with device. If jcount is greater than zero, then each jack from 0 to jcount can be queried with this function to get the jack description.

Note

Not available on UWP platform.

Parameters

device	Device index.
jackIndex	Jack index.
pJackDescription	Pointer to PaWasapiJackDescription.

Returns

Error code indicating success or failure.

See Also

PaWasapi_GetJackCount

References PaWasapiJackDescription::channelMapping, PaWasapiJackDescription::color, PaWasapiJackDescription::connectionType, PaWasapiDeviceInfo::device, PaWasapiJackDescription::genLocation, PaWasapiJackDescription::geoLocation, IF_FAILED_JUMP, PaWasapiJackDescription::isConnected, LogHostError, paNoError, paUnanticipatedHostError, PaWasapiJackDescription::portConnection, and SAFE_RELEASE.

PaError PaWasapi_Initialize	(	PaUtilHostApiRepresentation **	hostApi,
		PaHostApiIndex	index
	)

References PaWasapiHostApiRepresentation::allocations, PaWasapiHostApiRepresentation::blockingStreamInterface, PaWasapiHostApiRepresentation::callbackStreamInterface, PaWasapiHostApiRepresentation::comInitializationResult, GetStreamCpuLoad(), GetStreamReadAvailable(), GetStreamTime(), GetStreamWriteAvailable(), PaUtilHostApiRepresentation::info, PaWasapiHostApiRepresentation::inheritedHostApiRep, IsFormatSupported(), IsStreamActive(), IsStreamStopped(), OpenStream(), Pa_GetErrorText(), paInsufficientMemory, paNoDevice, paNoError, paOsVersionWindowsVistaServer2008, PaUtil_AllocateZeroInitializedMemory(), PaUtil_CreateAllocationGroup(), PaUtil_DummyGetCpuLoad(), PaUtil_DummyGetReadAvailable(), PaUtil_DummyGetWriteAvailable(), PaUtil_DummyRead(), PaUtil_DummyWrite(), PaUtil_InitializeStreamInterface(), paWASAPI, PaWinUtil_CoInitialize(), PaWinUtil_GetOsVersion(), PRINT, ReadStream(), PaHostApiInfo::structVersion, Terminate(), PaWasapiHostApiRepresentation::useWOW64Workaround, and WriteStream().

int PaWasapi_IsLoopback

(

PaDeviceIndex

device

)

Get device loopback state:

0 - Not loopback, 1 - Loopback, negative - PaErrorCode.

Parameters

device

Device index.

Returns

Non-negative value indicating loopback state or, a PaErrorCode (which is always negative) if PortAudio is not initialized or an error is encountered.

References PaWasapiHostApiRepresentation::deviceCount, PaWasapiHostApiRepresentation::devInfo, PaWasapiHostApiRepresentation::inheritedHostApiRep, PaWasapiDeviceInfo::loopBack, paInvalidDevice, paNoError, paNotInitialized, and PaUtil_DeviceIndexToHostApiDeviceIndex().

PaError PaWasapi_SetStreamStateHandler	(	PaStream *	pStream,
		PaWasapiStreamStateCallback	fnStateHandler,
		void *	pUserData
	)

Set stream state handler.

Parameters

pStream	Pointer to PaStream object.
fnStateHandler	Pointer to state handling function.
pUserData	Pointer to user data.

Returns

Error code indicating success or failure.

References PaWasapiStream::fnStateHandler, paBadStreamPtr, paNoError, and PaWasapiStream::pStateHandlerUserData.

PaError PaWasapi_ThreadPriorityBoost	(	void **	pTask,
		PaWasapiThreadPriority	priorityClass
	)

Boost thread priority of calling thread (MMCSS).

Use it for Blocking Interface only inside the thread which makes calls to Pa_WriteStream/Pa_ReadStream.

Parameters

pTask	Handle to pointer to priority task. Must be used with PaWasapi_RevertThreadPriority method to revert thread priority to initial state.
priorityClass	Id of thread priority of PaWasapiThreadPriority type. Specifying eThreadPriorityNone does nothing.

Returns

Error code indicating success or failure.

See Also

PaWasapi_RevertThreadPriority

References eThreadPriorityAudio, eThreadPriorityProAudio, FALSE, HANDLE(), paNoError, and paUnanticipatedHostError.

Referenced by ProcThreadEvent(), and ProcThreadPoll().

PaError PaWasapi_ThreadPriorityRevert

(

void *

pTask

)

Boost thread priority of calling thread (MMCSS).

Use it for Blocking Interface only inside the thread which makes calls to Pa_WriteStream/Pa_ReadStream.

Parameters

pTask

Task handle obtained by PaWasapi_BoostThreadPriority method.

Returns

Error code indicating success or failure.

See Also

PaWasapi_BoostThreadPriority

References FALSE, paNoError, and paUnanticipatedHostError.

PaError PaWasapi_UpdateDeviceList

(

)

Update device list.

This function is available if PA_WASAPI_MAX_CONST_DEVICE_COUNT is defined during compile time with maximum constant WASAPI device count (recommended value - 32). If PA_WASAPI_MAX_CONST_DEVICE_COUNT is set to 0 (or not defined) during compile time the implementation will not define PaWasapi_UpdateDeviceList() and thus updating device list can only be possible by calling Pa_Terminate() and then Pa_Initialize().

Returns

Error code indicating success or failure.

References paInternalError.

PaError PaWasapiWinrt_PopulateDeviceList	(	const unsigned short **	pId,
		const unsigned short **	pName,
		const PaWasapiDeviceRole *	pRole,
		unsigned int	count,
		int	bOutput
	)

Populate the device list.

By default the implementation will rely on DEVINTERFACE_AUDIO_RENDER and DEVINTERFACE_AUDIO_CAPTURE as default devices. If device Id is provided by PaWasapiWinrt_SetDefaultDeviceId() then those device Ids will be used as default and only devices for the device list.

By populating the device list you can provide an additional available audio devices of the system to PA which are obtainable by: Windows::Devices::Enumeration::DeviceInformation::FindAllAsync(selector) where selector is obtainable by Windows::Media::Devices::MediaDevice::GetAudioRenderSelector() or Windows::Media::Devices::MediaDevice::GetAudioCaptureSelector() API.

After the call completes, memory referenced by pointers can be freed, as implementation keeps its own copy.

You must call PaWasapi_UpdateDeviceList() to update the internal device list of the implementation after calling this function.

See an example in the IMPORTANT notes.

Note

UWP/WinRT platform only.

Parameters

pId	Array of device Ids, pointer to the array of pointers of 16-bit Unicode string (WCHAR). If NULL and count is also 0 then device Ids will be reset to the default. Required.
pName	Array of device Names, pointer to the array of pointers of 16-bit Unicode string (WCHAR). Optional.
pRole	Array of device Roles, see PaWasapiDeviceRole and PaWasapi_GetDeviceRole() for more details. Optional.
count	Number of devices, the number of array elements (pId, pName, pRole). Maximum count of devices is limited by PA_WASAPI_DEVICE_MAX_COUNT.
bOutput	TRUE (1) for output (render), FALSE (0) for input (capture).

Returns

Error code indicating success or failure. Will return paIncompatibleStreamHostApi if library is not compiled for UWP/WinRT platform. If Id is longer than PA_WASAPI_DEVICE_ID_LEN characters paBufferTooBig will be returned. If Name is longer than PA_WASAPI_DEVICE_NAME_LEN characters paBufferTooBig will be returned.

References PA_WASAPI_DEVICE_ID_LEN, PA_WASAPI_DEVICE_NAME_LEN, paBufferTooBig, paIncompatibleStreamHostApi, paInsufficientMemory, paNoError, and STATIC_ARRAY_SIZE.

PaError PaWasapiWinrt_SetDefaultDeviceId	(	const unsigned short *	pId,
		int	bOutput
	)

Set default device Id.

By default implementation will use the DEVINTERFACE_AUDIO_RENDER and DEVINTERFACE_AUDIO_CAPTURE Ids if device Id is not provided explicitly. These default Ids will not allow to use Exclusive mode on UWP/WinRT platform and thus you must provide device Id explicitly via this API before calling the Pa_OpenStream().

Device Ids on UWP platform are obtainable via: Windows::Media::Devices::MediaDevice::GetDefaultAudioRenderId() or Windows::Media::Devices::MediaDevice::GetDefaultAudioCaptureId() API.

After the call completes, memory referenced by pointers can be freed, as implementation keeps its own copy.

Call this function before calling Pa_IsFormatSupported() when Exclusive mode is requested.

See an example in the IMPORTANT notes.

Note

UWP/WinRT platform only.

Parameters

pId	Device Id, pointer to the 16-bit Unicode string (WCHAR). If NULL then device Id will be reset to the default, e.g. DEVINTERFACE_AUDIO_RENDER or DEVINTERFACE_AUDIO_CAPTURE.
bOutput	TRUE (1) for output (render), FALSE (0) for input (capture).

Returns

Error code indicating success or failure. Will return paIncompatibleStreamHostApi if library is not compiled for UWP/WinRT platform. If Id is longer than PA_WASAPI_DEVICE_ID_LEN characters paBufferTooBig will be returned.

References PA_WASAPI_DEVICE_ID_LEN, paBufferTooBig, paIncompatibleStreamHostApi, paNoError, and STATIC_ARRAY_SIZE.

PA_THREAD_FUNC ProcThreadEvent

(

void *

param

)

References BOOL(), PaWasapiStream::captureClient, PaWasapiSubStream::clientProc, PaWasapiStream::event, FALSE, PaWasapiSubStream::framesPerBuffer, PaWasapiStream::hAvTask, PaWasapiStream::hostProcessOverrideInput, PaWasapiStream::hostProcessOverrideOutput, PaWasapiStream::hThreadExit, PaWasapiStream::hThreadStart, PaWasapiStream::in, PaWasapiStream::isActive, LogHostError, PaWasapiStream::nThreadPriority, PaWasapiStream::out, paUnanticipatedHostError, PaWasapi_ThreadPriorityBoost(), paWasapiStreamStateThreadPrepare, paWasapiStreamStateThreadStart, paWasapiStreamStateThreadStop, PRINT, PaWasapiHostProcessor::processor, PaWasapiStream::renderClient, S_COUNT, S_INPUT, S_OUTPUT, PaWasapiSubStream::shareMode, TRUE, and PaWasapiHostProcessor::userData.

PA_THREAD_FUNC ProcThreadPoll

(

void *

param

)

Do first loop without waiting as time could be spent when calling other APIs before ProcessXXXBuffer.

References BOOL(), PaWasapiStream::bufferMode, PaWasapiStream::captureClient, PaWasapiSubStream::clientProc, FALSE, PaWasapiSubStream::framesPerBuffer, PaWasapiStream::hAvTask, PaWasapiStream::hostProcessOverrideInput, PaWasapiStream::hostProcessOverrideOutput, PaWasapiStream::hThreadExit, PaWasapiStream::hThreadStart, PaWasapiStream::in, PaWasapiStream::isActive, LogHostError, PaWasapiSubStream::monoBuffer, PaWasapiSubStream::monoMixer, PaWasapiStream::nThreadPriority, PaWasapiStream::out, PA_WASAPI__IS_FULLDUPLEX, paUnanticipatedHostError, paUtilFixedHostBufferSize, PaWasapi_ThreadPriorityBoost(), paWasapiStreamStateThreadPrepare, paWasapiStreamStateThreadStart, paWasapiStreamStateThreadStop, PaWasapiHostProcessor::processor, PaWasapiStream::renderClient, S_COUNT, S_FULLDUPLEX, S_INPUT, S_OUTPUT, PaWasapiSubStream::shareMode, PaWasapiStream::timer, TRUE, and PaWasapiHostProcessor::userData.

Variable Documentation

typedef LPDWORD

Referenced by PaWinWdm_Initialize().

FAvRevertMmThreadCharacteristics pAvRevertMmThreadCharacteristics = NULL

FAvRtCreateThreadOrderingGroup pAvRtCreateThreadOrderingGroup = NULL

FAvRtDeleteThreadOrderingGroup pAvRtDeleteThreadOrderingGroup = NULL

FAvRtWaitOnThreadOrderingGroup pAvRtWaitOnThreadOrderingGroup = NULL

FAvSetMmThreadCharacteristics pAvSetMmThreadCharacteristics = NULL

FAvSetMmThreadPriority pAvSetMmThreadPriority = NULL