[nyadav] 52020: [AUDSRV] Use Double Buffering to Improve latency

Author: nyadav
Date: Tue May 31 16:30:46 2011
New Revision: 52020

URL: http://svn.reactos.org/svn/reactos?rev=52020&view=rev
Log:
[AUDSRV] Use Double Buffering to Improve latency

Added:
    branches/nyadav-audio-branch/base/services/audsrv/stream.c   (with props)
Modified:
    branches/nyadav-audio-branch/base/services/audsrv/CMakeLists.txt
    branches/nyadav-audio-branch/base/services/audsrv/audsrv.c
    branches/nyadav-audio-branch/base/services/audsrv/audsrv.h
    branches/nyadav-audio-branch/base/services/audsrv/rpc.c
    branches/nyadav-audio-branch/dll/win32/audsrvapi/audsrvapi.c
    branches/nyadav-audio-branch/dll/win32/audsrvapi/dllmain.c
    branches/nyadav-audio-branch/include/reactos/idl/audsrvrpc.idl
    branches/nyadav-audio-branch/include/reactos/libs/audsrv/audsrvapi.h

Modified: branches/nyadav-audio-branch/base/services/audsrv/CMakeLists.txt
URL:
http://svn.reactos.org/svn/reactos/branches/nyadav-audio-branch/base/servic…
==============================================================================
--- branches/nyadav-audio-branch/base/services/audsrv/CMakeLists.txt [iso-8859-1]
(original)
+++ branches/nyadav-audio-branch/base/services/audsrv/CMakeLists.txt [iso-8859-1] Tue May
31 16:30:46 2011
@@ -6,7 +6,8 @@
 list(APPEND SOURCE
     audsrv.c
     audsrv.rc
-    rpc.c)
+    rpc.c
+	stream.c)
 
 add_executable(audsrv ${SOURCE})
 

Modified: branches/nyadav-audio-branch/base/services/audsrv/audsrv.c
URL:
http://svn.reactos.org/svn/reactos/branches/nyadav-audio-branch/base/servic…
==============================================================================
--- branches/nyadav-audio-branch/base/services/audsrv/audsrv.c [iso-8859-1] (original)
+++ branches/nyadav-audio-branch/base/services/audsrv/audsrv.c [iso-8859-1] Tue May 31
16:30:46 2011
@@ -153,27 +153,24 @@
 
 
 
-void fill(MixerEngine * mixer)
+void fill(MixerEngine * mixer,int buffer)
 {
 	DWORD Length;
 	UINT i = 0;
-	mixer->mastervolume = 1000;
-	mixer->masterchannels=2;
-	mixer->masterfreq=48000;
-	mixer->masterbitspersample=16;
-	mixer->masterchannelmask = KSAUDIO_SPEAKER_STEREO;
+Sleep(100);
 	Length = mixer->masterfreq * mixer->masterchannels * mixer->masterbitspersample
/ 8;
-	mixer->masterbuf = (PSHORT)HeapAlloc(GetProcessHeap(), 0, Length);
+	mixer->masterbuf[buffer] = (PSHORT)HeapAlloc(GetProcessHeap(), 0, Length);
     while (i < Length / 2)
     {
-        mixer->masterbuf[i] = 0x7FFF * sin(0.5 * (i - 1) * 500 * _2pi / 48000);
+        mixer->masterbuf[buffer][i] = 0x7FFF * sin(0.5 * (i - 1) * 500 * _2pi /
48000);
         i++;
-        mixer->masterbuf[i] = 0x7FFF * sin(0.5 * (i - 2) * 500 * _2pi / 48000);
+        mixer->masterbuf[buffer][i] = 0x7FFF * sin(0.5 * (i - 2) * 500 * _2pi /
48000);
         i++;
     }
-}
-
-void initdevice(MixerEngine * mixer)
+	mixer->bytes_to_play = Length;
+}
+
+void playbuffer(MixerEngine * mixer,int buffer)
 {
 	SP_DEVICE_INTERFACE_DATA InterfaceData;
     SP_DEVINFO_DATA DeviceData;
@@ -186,7 +183,8 @@
     DWORD Length;
     BOOL Result;
     NTSTATUS Status;
-
+if(mixer->masterbuf[buffer])
+{
     //
     // Get a handle to KS Audio Interfaces
     //
@@ -195,7 +193,7 @@
                                        NULL,
                                        DIGCF_DEVICEINTERFACE |DIGCF_PRESENT);
 
-   printf("DeviceHandle %p\n", DeviceHandle);
+   //printf("DeviceHandle %p\n", DeviceHandle);
 
     //
     // Enumerate the first interface
@@ -208,7 +206,7 @@
                                 1,
                                 &InterfaceData);
 
-   printf("SetupDiEnumDeviceInterfaces %u Error %ld\n", Result,
GetLastError());
+   //printf("SetupDiEnumDeviceInterfaces %u Error %ld\n", Result,
GetLastError());
 
     //
     // Get the interface details (namely the device path)
@@ -227,7 +225,7 @@
                                     NULL,
                                     &DeviceData);
 
-    wprintf(L"SetupDiGetDeviceInterfaceDetail %u Path DetailData %s\n", Result,
(LPWSTR)&DetailData->DevicePath[0]);
+    //wprintf(L"SetupDiGetDeviceInterfaceDetail %u Path DetailData %s\n",
Result, (LPWSTR)&DetailData->DevicePath[0]);
 
     //
     // Open a handle to the device
@@ -240,7 +238,7 @@
                               FILE_ATTRIBUTE_NORMAL,
                               NULL);
 
-    printf("Handle %p\n", mixer->FilterHandle);
+    //printf("Handle %p\n", mixer->FilterHandle);
 
     //
     // Close the interface handle and clean up
@@ -273,7 +271,7 @@
     //
     // Setup the KS Data Format Information
     //
-    printf("DataFormat %p %p\n", DataFormat,(PVOID)((((ULONG_PTR)DataFormat +
7)) & ~7));
+    //printf("DataFormat %p %p\n", DataFormat,(PVOID)((((ULONG_PTR)DataFormat +
7)) & ~7));
 
     DataFormat->Flags = 0;
     DataFormat->Reserved = 0;
@@ -294,14 +292,14 @@
     WaveFormat->Samples.wValidBitsPerSample = mixer->masterbitspersample;
     WaveFormat->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
 
-    printf("Creating pin\n");
+    //printf("Creating pin\n");
 
 	//
     // Create the pin
     //
     Status = KsCreatePin(mixer->FilterHandle, PinConnect, GENERIC_READ|GENERIC_WRITE,
&(mixer->PinHandle));
 
-    printf("PinHandle %p Status %lx\n", mixer->PinHandle, Status);
+    //printf("PinHandle %p Status %lx\n", mixer->PinHandle, Status);
 
 
     Length = mixer->masterfreq * mixer->masterchannels *
mixer->masterbitspersample / 8;
@@ -311,9 +309,9 @@
     mixer->Packet = (PKSSTREAM_HEADER)HeapAlloc(GetProcessHeap(),
                                          HEAP_ZERO_MEMORY,
                                          sizeof(KSSTREAM_HEADER));
-	mixer->Packet->Data = mixer->masterbuf;
-    mixer->Packet->FrameExtent = Length;
-    mixer->Packet->DataUsed = Length;
+	mixer->Packet->Data = mixer->masterbuf[buffer];
+    mixer->Packet->FrameExtent = mixer->bytes_to_play;
+    mixer->Packet->DataUsed = mixer->bytes_to_play;
     mixer->Packet->Size = sizeof(KSSTREAM_HEADER);
     mixer->Packet->PresentationTime.Numerator = 1;
     mixer->Packet->PresentationTime.Denominator = 1;
@@ -338,13 +336,6 @@
                     sizeof(State),
                     &Length,
                     NULL);
-}
-void playbuffer(MixerEngine * mixer)
-{
-    DWORD Length = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA) + MAX_PATH * sizeof(WCHAR);
-    //
-    // Play our 1-second buffer
-    //
 
     DeviceIoControl(mixer->PinHandle,
                     IOCTL_KS_WRITE_STREAM,
@@ -355,14 +346,6 @@
                     &Length,
                     NULL);
 
-}
-void closedevice(MixerEngine * mixer)
-{
-    KSSTATE State;
-	DWORD Length = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA) + MAX_PATH * sizeof(WCHAR);
-    //
-    // Change the state to stop
-    //
     State = KSSTATE_STOP;
     DeviceIoControl(mixer->PinHandle,
                     IOCTL_KS_PROPERTY,
@@ -375,17 +358,21 @@
 
     CloseHandle(mixer->PinHandle);
     CloseHandle(mixer->FilterHandle);
-
+}
 }
 DWORD WINAPI RunMixerThread(LPVOID param)
 {
 	MixerEngine * mixer = (MixerEngine *) param;
-	SetEvent(mixer->EventPool[0]);
+
+	SetEvent(mixer->played);
 	while(1)
 	{
-	while(WaitForSingleObject(mixer->EventPool[0],100)!=0){if(mixer->dead)goto DEAD;}
-	fill(mixer);
-	SetEvent(mixer->EventPool[1]);
+	while(WaitForSingleObject(mixer->streampresent,100)!=0){if(mixer->dead)goto DEAD;}
/*Check if there is at least one stream present.*/
+
+	while(WaitForSingleObject(mixer->played,100)!=0){if(mixer->dead)goto DEAD;}
+	fill(mixer,1-mixer->playcurrent);
+	SetEvent(mixer->filled);
+
 	}
 DEAD:
 	printf("\nMixer Thread Ended\n");
@@ -396,11 +383,11 @@
 	MixerEngine * mixer = (MixerEngine *) param;
 	while(1)
 	{
-		while(WaitForSingleObject(mixer->EventPool[1],100)!=0){if(mixer->dead)goto
DEAD;}
-	initdevice(mixer);
-		playbuffer(mixer);
-	closedevice(mixer);
-		SetEvent(mixer->EventPool[0]);
+		while(WaitForSingleObject(mixer->filled,100)!=0){if(mixer->dead)goto DEAD;}
+		SetEvent(mixer->played);
+		playbuffer(mixer,mixer->playcurrent);
+
+		mixer->playcurrent=1-mixer->playcurrent;
 	}
 
 DEAD:
@@ -481,8 +468,12 @@
 	pengine->mute=FALSE;
 
 	pengine->dead=0;
-	pengine->EventPool[0]=CreateEvent(NULL,FALSE,FALSE,NULL);
-	pengine->EventPool[1]=CreateEvent(NULL,FALSE,FALSE,NULL);
+	pengine->playcurrent=1;
+	pengine->masterbuf[0] = NULL;
+	pengine->masterbuf[1] = NULL;
+	pengine->played=CreateEvent(NULL,FALSE,FALSE,NULL);
+	pengine->filled=CreateEvent(NULL,FALSE,FALSE,NULL);
+	pengine->streampresent=CreateEvent(NULL,TRUE,FALSE,NULL);
 	SetConsoleCtrlHandler(close,TRUE);
 	SpawnMixerThread(pengine);
 	SpawnPlayerThread(pengine);
@@ -510,8 +501,12 @@
 	pengine->mute=FALSE;
 
 	pengine->dead=0;
-	pengine->EventPool[0]=CreateEvent(NULL,FALSE,FALSE,NULL);
-	pengine->EventPool[1]=CreateEvent(NULL,FALSE,FALSE,NULL);
+	pengine->playcurrent=1;
+	pengine->masterbuf[0] = NULL;
+	pengine->masterbuf[1] = NULL;
+	pengine->played=CreateEvent(NULL,FALSE,FALSE,NULL);
+	pengine->filled=CreateEvent(NULL,FALSE,FALSE,NULL);
+	pengine->streampresent=CreateEvent(NULL,TRUE,FALSE,NULL);
 	SetConsoleCtrlHandler(close,TRUE);
 	SpawnMixerThread(pengine);
 	SpawnPlayerThread(pengine);

Modified: branches/nyadav-audio-branch/base/services/audsrv/audsrv.h
URL:
http://svn.reactos.org/svn/reactos/branches/nyadav-audio-branch/base/servic…
==============================================================================
--- branches/nyadav-audio-branch/base/services/audsrv/audsrv.h [iso-8859-1] (original)
+++ branches/nyadav-audio-branch/base/services/audsrv/audsrv.h [iso-8859-1] Tue May 31
16:30:46 2011
@@ -34,6 +34,8 @@
 	int bitspersample;
 	int channels;
 	ULONG channelmask;
+	HANDLE played;
+	HANDLE streamready;
 	HANDLE thread;
 	float balance;
 	struct ServerStream * next;
@@ -43,10 +45,13 @@
 {
 /*Should be Initialized at Server Start*/
 	char dead;
-	HANDLE EventPool[2];//0=Played,1=Ready
+	HANDLE played;
+	HANDLE filled;
+	HANDLE streampresent;
 	HANDLE mixerthread;
 	HANDLE playerthread;
 	HANDLE rpcthread;
+	int playcurrent;
 /*Should be Initialized at Server Start from configuration file,Currently there is no
configuration file so initialized to a fixed value at start*/
 	int mastervolume;
 	BOOL mute;
@@ -55,8 +60,9 @@
 	int masterchannels;
 	unsigned long masterchannelmask;
 	int masterbitspersample;
-	PSHORT masterbuf;
+	PSHORT masterbuf[2];
 /*Currently don't know the future of following variables*/
+	long bytes_to_play;
 	HANDLE FilterHandle;
     HANDLE PinHandle;
 	PKSPROPERTY Property;
@@ -64,10 +70,15 @@
 	ServerStream * serverstreamlist;
 } MixerEngine;
 
-extern MixerEngine engine;
+extern MixerEngine engine,*pengine;
 
 /* rpc.c */
 DWORD WINAPI RunRPCThread(LPVOID lpParameter);
+/* audsrv.c*/
+void fill(MixerEngine * mixer,int buffer);
+void playbuffer(MixerEngine * mixer,int buffer);
+/*stream.c*/
+HANDLE addstream(LONG frequency,int channels,int bitspersample, ULONG channelmask,int
volume,int mute,float balance);
 /********************************/
 
 #endif  /* __AUDSRV_H__ */

Modified: branches/nyadav-audio-branch/base/services/audsrv/rpc.c
URL:
http://svn.reactos.org/svn/reactos/branches/nyadav-audio-branch/base/servic…
==============================================================================
--- branches/nyadav-audio-branch/base/services/audsrv/rpc.c [iso-8859-1] (original)
+++ branches/nyadav-audio-branch/base/services/audsrv/rpc.c [iso-8859-1] Tue May 31
16:30:46 2011
@@ -45,11 +45,13 @@
 
 /*************************RPC Functions**********************************/
 
-NTSTATUS AUDInitStream(	IN RPC_BINDING_HANDLE hBinding)
+int AUDInitStream(	IN RPC_BINDING_HANDLE hBinding,LONG frequency,int channels,int
bitspersample, ULONG channelmask,int volume,int mute,float balance)
 {
-    UNIMPLEMENTED;/*Coolest Macro I have ever seen*/
-	printf("Client Connected and called server's procedure\n");
-    return STATUS_NOT_IMPLEMENTED;
+	HANDLE stream;
+	printf("Client Connected and Initiated Stream Freq: %ld,Channle: %d,Bitspersample:
%d,Mask: %ld,Volume: %d,Mute: %d,Balance:
%f\n",frequency,channels,bitspersample,channelmask,volume,mute,balance);
+	stream = addstream(frequency,channels,bitspersample,channelmask,volume,mute,balance);
+	if( stream == NULL ){return 0;}else{printf("Stream added\n");}
+    return (int)stream;
 }
 /*************************************************************************/
 void __RPC_FAR *__RPC_USER midl_user_allocate(SIZE_T len)

Added: branches/nyadav-audio-branch/base/services/audsrv/stream.c
URL:
http://svn.reactos.org/svn/reactos/branches/nyadav-audio-branch/base/servic…
==============================================================================
--- branches/nyadav-audio-branch/base/services/audsrv/stream.c (added)
+++ branches/nyadav-audio-branch/base/services/audsrv/stream.c [iso-8859-1] Tue May 31
16:30:46 2011
@@ -1,0 +1,59 @@
+#include "audsrv.h"
+
+DWORD WINAPI RunStreamThread(LPVOID param)
+{
+	ServerStream * localstream = (ServerStream *) param;
+
+	SetEvent(localstream->streamready);
+	printf("Signaling Mixer Thread For First Stream\n");
+	SetEvent(pengine->streampresent);
+	while (1){OutputDebugStringA("Stream Thread Running.");Sleep(100);};
+	/*Clean Stream's data*/
+}
+
+HANDLE addstream(LONG frequency,int channels,int bitspersample, ULONG channelmask,int
volume,int mute,float balance)
+{
+	ServerStream * newstream,*localstream;
+	DWORD dwID;
+
+	/*Add Data to Linked list*/
+	localstream = pengine->serverstreamlist;
+	newstream = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(ServerStream));
+	if(newstream == NULL) {goto error;}
+	if(volume < 0) {newstream->volume = 0;}else if (volume > 1000)
{newstream->volume = 1000;}else {newstream->volume = volume;}
+	if(volume < -1.0) {newstream->volume = -1.0;}else if (volume > 1.0)
{newstream->volume = 1.0;}else {newstream->volume = volume;}
+	newstream->freq = frequency;  /*TODO frequency validation required*/
+	newstream->bitspersample = bitspersample; /*TODO bitspersample validation*/
+	newstream->channels = channels; /*TODO validation*/
+	newstream->channelmask = channelmask; /*TODO validation*/
+
+	newstream->next = NULL;
+	newstream->played = CreateEvent(NULL,FALSE,FALSE,NULL);
+	newstream->streamready = CreateEvent(NULL,FALSE,FALSE,NULL);
+
+	if(newstream->played == NULL || newstream->streamready == NULL) {goto error;}
+	newstream->thread=CreateThread(NULL,0,RunStreamThread,newstream,0,&dwID);
+	if(newstream->thread == NULL) {goto error;}
+
+	WaitForSingleObject(newstream->streamready,INFINITE);
+
+	if(localstream == NULL)
+	{
+	pengine->serverstreamlist = localstream;
+
+	pengine->masterfreq=frequency;
+	pengine->masterchannels=channels;
+	pengine->masterchannelmask=channelmask;
+	pengine->masterbitspersample=bitspersample;
+	}
+	else
+	{
+		while(localstream->next != NULL){localstream = localstream->next;}
+		localstream->next = newstream;
+	}
+	return newstream->thread;
+
+error:
+	HeapFree(GetProcessHeap(), 0, newstream);
+	return NULL;
+}

Propchange: branches/nyadav-audio-branch/base/services/audsrv/stream.c
------------------------------------------------------------------------------
    eol-style = native

Propchange: branches/nyadav-audio-branch/base/services/audsrv/stream.c
------------------------------------------------------------------------------
    mime-type = text/plain

Propchange: branches/nyadav-audio-branch/base/services/audsrv/stream.c
------------------------------------------------------------------------------
    svn:eol-style = native

Propchange: branches/nyadav-audio-branch/base/services/audsrv/stream.c
------------------------------------------------------------------------------
    svn:mime-type = text/plain

Modified: branches/nyadav-audio-branch/dll/win32/audsrvapi/audsrvapi.c
URL:
http://svn.reactos.org/svn/reactos/branches/nyadav-audio-branch/dll/win32/a…
==============================================================================
--- branches/nyadav-audio-branch/dll/win32/audsrvapi/audsrvapi.c [iso-8859-1] (original)
+++ branches/nyadav-audio-branch/dll/win32/audsrvapi/audsrvapi.c [iso-8859-1] Tue May 31
16:30:46 2011
@@ -7,38 +7,25 @@
  */
 WINAPI int initstream (ClientStream * clientstream,LONG frequency,int channels,int
bitspersample, ULONG channelmask,int volume,int mute,float balance)
 {
-	RPC_STATUS status;
-    unsigned short * pszStringBinding    = NULL;
-
-
-	if(clientstream == NULL ) return -1;
+	int streamid;
+	if (clientstream == NULL ) return -1;
 	if (clientstream->callbacks.OpenComplete == NULL ||
clientstream->callbacks.BufferCopied == NULL || clientstream->callbacks.PlayComplete
== NULL) return -2;
 	/*Validity of all other data will be checked at server*/
 	/*Check Connection Status If not connected call Connect()*/
 	/*If connected Properly call the remote audsrv_initstream() function*/
-		status =
RpcStringBindingComposeW(NULL,L"ncacn_np",NULL,L"\\pipe\\audsrv",
NULL,&pszStringBinding);
-
-		status = RpcBindingFromStringBindingW(pszStringBinding, &audsrv_v0_0_c_ifspec);
- 
-		if (status) printf("Connection Problem p %d \n",status);
-
-		status = RpcStringFree(&pszStringBinding);
- 
-		if (status) printf("Problem Freeing String : %d \n",status);
-
 
 	RpcTryExcept  
     {
-		AUDInitStream (audsrv_v0_0_c_ifspec);
+		streamid = AUDInitStream
(audsrv_v0_0_c_ifspec,frequency,channels,bitspersample,channelmask,volume,mute,balance);
+		printf("AUDInitStream Returned %d",streamid);
     }
-    RpcExcept(1) 
+    RpcExcept(1)
     {
         status = RpcExceptionCode();
         printf("Runtime reported exception 0x%lx = %ld\n", status, status);
     }
     RpcEndExcept
-		    status = RpcBindingFree(&audsrv_v0_0_c_ifspec);
- 		if (status == RPC_S_INVALID_BINDING) printf("Error : %d Invalid RPC S
HANDLE\n",status);
+
 	/*Analyse the return by the function*/
 	/*Currently Suppose the return is 0 and a valid streamid is returned*/
 	clientstream->stream = &status;

Modified: branches/nyadav-audio-branch/dll/win32/audsrvapi/dllmain.c
URL:
http://svn.reactos.org/svn/reactos/branches/nyadav-audio-branch/dll/win32/a…
==============================================================================
--- branches/nyadav-audio-branch/dll/win32/audsrvapi/dllmain.c [iso-8859-1] (original)
+++ branches/nyadav-audio-branch/dll/win32/audsrvapi/dllmain.c [iso-8859-1] Tue May 31
16:30:46 2011
@@ -7,13 +7,27 @@
                        LPVOID lpReserved
 					 )
 {   
-
+	RPC_STATUS status;
+    unsigned short * pszStringBinding    = NULL;
+	
 	switch (ul_reason_for_call)
 	{
 	case DLL_PROCESS_ATTACH:
+		status =
RpcStringBindingComposeW(NULL,L"ncacn_np",NULL,L"\\pipe\\audsrv",
NULL,&pszStringBinding);
+
+		status = RpcBindingFromStringBindingW(pszStringBinding, &audsrv_v0_0_c_ifspec);
+
+		if (status) printf("Connection Problem p %d \n",status);
+
+		status = RpcStringFree(&pszStringBinding);
+
+		if (status) printf("Problem Freeing  String : %d \n",status);
+		break;
 	case DLL_THREAD_ATTACH:
 	case DLL_THREAD_DETACH:
 	case DLL_PROCESS_DETACH:
+		status = RpcBindingFree(audsrv_v0_0_c_ifspec);
+ 		if (status == RPC_S_INVALID_BINDING) printf("Error : %d Invalid RPC S
HANDLE\n",status);
 	break;
 	}
 	return TRUE;

Modified: branches/nyadav-audio-branch/include/reactos/idl/audsrvrpc.idl
URL:
http://svn.reactos.org/svn/reactos/branches/nyadav-audio-branch/include/rea…
==============================================================================
--- branches/nyadav-audio-branch/include/reactos/idl/audsrvrpc.idl [iso-8859-1]
(original)
+++ branches/nyadav-audio-branch/include/reactos/idl/audsrvrpc.idl [iso-8859-1] Tue May 31
16:30:46 2011
@@ -3,6 +3,7 @@
  */
 
 #include <ms-dtyp.idl>
+
 
 cpp_quote("#if !defined(__AUDSRV_H__) ")
 typedef long NTSTATUS;
@@ -19,6 +20,7 @@
 typedef AUDSRV_HANDLE *PAUDSRV_HANDLE;
 typedef [handle, unique] LPWSTR AUDSRV_HANDLE_W;
 typedef [handle, unique] LPSTR AUDSRV_HANDLE_A;
+
 
 typedef struct _RPC_CLIENT_ID {
     DWORD UniqueProcess;
@@ -37,6 +39,6 @@
 interface audsrv
 {
 
-    NTSTATUS AUDInitStream([in] handle_t h1);
+    int AUDInitStream([in] handle_t h1,[in]LONG frequency,[in]int channels,[in]int
bitspersample,[in] ULONG channelmask,[in]int volume,[in]int mute,[in]float balance);
 
 }

Modified: branches/nyadav-audio-branch/include/reactos/libs/audsrv/audsrvapi.h
URL:
http://svn.reactos.org/svn/reactos/branches/nyadav-audio-branch/include/rea…
==============================================================================
--- branches/nyadav-audio-branch/include/reactos/libs/audsrv/audsrvapi.h [iso-8859-1]
(original)
+++ branches/nyadav-audio-branch/include/reactos/libs/audsrv/audsrvapi.h [iso-8859-1] Tue
May 31 16:30:46 2011
@@ -7,6 +7,7 @@
 #include <stdio.h>
 
 /********************Structures*********************/
+
 typedef struct CallBacks
 {
 	void (*OpenComplete) (int error );
@@ -18,7 +19,7 @@
 {
 HANDLE stream;
 int dead;
-HANDLE ClientEventPool[1];  /*[0]th event is for Activescheduler*/ 
+HANDLE ClientEventPool[1];  //0]th event is for Activescheduler
 struct CallBacks callbacks;
 } ClientStream;