Clean up DirectSound driver in audiolib

This includes a small patch from Nuke.YKT as well.

git-svn-id: https://svn.eduke32.com/eduke32@7361 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
terminx 2019-03-02 23:21:01 +00:00
parent c757725e65
commit 425c183c67
2 changed files with 308 additions and 338 deletions

View File

@ -24,75 +24,58 @@
#define NEED_MMSYSTEM_H
#define NEED_DSOUND_H
#include "windows_inc.h"
#include "compat.h"
#include "driver_directsound.h"
#include "multivoc.h"
#include "windows_inc.h"
enum {
DSErr_Warning = -2,
DSErr_Error = -1,
DSErr_Ok = 0,
DSErr_Uninitialised,
DSErr_DirectSoundCreate,
DSErr_SetCooperativeLevel,
DSErr_CreateSoundBuffer,
DSErr_CreateSoundBufferSecondary,
DSErr_SetFormat,
DSErr_SetFormatSecondary,
DSErr_Notify,
DSErr_NotifyEvents,
DSErr_SetNotificationPositions,
DSErr_Play,
DSErr_PlaySecondary,
DSErr_CreateThread,
DSErr_CreateMutex
};
#define MIXBUFFERPOSITIONS 8
static int32_t ErrorCode = DSErr_Ok;
static int32_t Initialised = 0;
static int32_t Playing = 0;
static int32_t Initialised;
static int32_t Playing;
static char *MixBuffer = NULL;
static int32_t MixBufferSize = 0;
static int32_t MixBufferCount = 0;
static int32_t MixBufferCurrent = 0;
static int32_t MixBufferUsed = 0;
static void ( *MixCallBack )( void ) = NULL;
static char * MixBuffer = NULL;
static int32_t MixBufferSize;
static int32_t MixBufferCount;
static int32_t MixBufferCurrent;
static int32_t MixBufferUsed;
static void (*MixCallBack)(void) = NULL;
static LPDIRECTSOUND lpds = NULL;
static LPDIRECTSOUNDBUFFER lpdsbprimary = NULL, lpdsbsec = NULL;
static LPDIRECTSOUNDNOTIFY lpdsnotify = NULL;
static DSBPOSITIONNOTIFY notifyPositions[3] = { { 0,0 }, { 0,0 }, { 0,0 } };
static HANDLE mixThread = NULL;
static HANDLE mutex = NULL;
static HANDLE mutex = NULL;
static DSBPOSITIONNOTIFY notifyPositions[MIXBUFFERPOSITIONS + 1] = {};
static void FillBufferPortion(char * ptr, int32_t remaining)
static void FillBufferPosition(char * ptr, int32_t remaining)
{
int32_t len = 0;
char *sptr;
while (remaining >= len) {
if (MixBufferUsed == MixBufferSize) {
do
{
if (MixBufferUsed == MixBufferSize)
{
MixCallBack();
MixBufferUsed = 0;
MixBufferCurrent++;
if (MixBufferCurrent >= MixBufferCount) {
if (++MixBufferCurrent >= MixBufferCount)
MixBufferCurrent -= MixBufferCount;
}
}
while (remaining >= len && MixBufferUsed < MixBufferSize) {
sptr = MixBuffer + (MixBufferCurrent * MixBufferSize) + MixBufferUsed;
do
{
char *sptr = MixBuffer + (MixBufferCurrent * MixBufferSize) + MixBufferUsed;
len = MixBufferSize - MixBufferUsed;
if (remaining < len) {
if (remaining < len)
len = remaining;
}
memcpy(ptr, sptr, len);
@ -100,110 +83,301 @@ static void FillBufferPortion(char * ptr, int32_t remaining)
MixBufferUsed += len;
remaining -= len;
}
while (remaining >= len && MixBufferUsed < MixBufferSize);
}
while (remaining >= len);
}
static void FillBuffer(int32_t bufnum)
{
HRESULT err;
LPVOID ptr, ptr2;
DWORD remaining, remaining2;
int32_t retries = 1;
//initprintf( "DirectSound FillBuffer: filling %d\n", bufnum);
do {
err = IDirectSoundBuffer_Lock(lpdsbsec,
notifyPositions[bufnum].dwOffset,
notifyPositions[1].dwOffset,
&ptr, &remaining,
&ptr2, &remaining2,
0);
if (FAILED(err)) {
if (err == DSERR_BUFFERLOST) {
err = IDirectSoundBuffer_Restore(lpdsbsec);
if (FAILED(err)) {
do
{
HRESULT err = IDirectSoundBuffer_Lock(lpdsbsec, notifyPositions[bufnum].dwOffset, notifyPositions[1].dwOffset,
&ptr, &remaining, &ptr2, &remaining2, 0);
if (FAILED(err))
{
if (err == DSERR_BUFFERLOST)
{
if (FAILED(err = IDirectSoundBuffer_Restore(lpdsbsec)))
return;
}
if (retries-- > 0) {
if (retries-- > 0)
continue;
}
}
if (MV_Printf)
MV_Printf("DirectSound FillBuffer: err %x\n", (uint32_t) err);
MV_Printf("DirectSound FillBuffer: err %x\n", (uint32_t)err);
return;
}
break;
} while (1);
}
while (1);
if (ptr) {
FillBufferPortion((char *) ptr, remaining);
}
if (ptr2) {
FillBufferPortion((char *) ptr2, remaining2);
}
if (ptr && remaining)
FillBufferPosition((char *)ptr, remaining);
if (ptr2 && remaining2)
FillBufferPosition((char *)ptr2, remaining2);
IDirectSoundBuffer_Unlock(lpdsbsec, ptr, remaining, ptr2, remaining2);
}
static DWORD WINAPI fillDataThread(LPVOID lpParameter)
{
DWORD waitret, waitret2;
HANDLE handles[] = { handles[0] = notifyPositions[0].hEventNotify,
handles[1] = notifyPositions[1].hEventNotify,
handles[2] = notifyPositions[2].hEventNotify };
UNREFERENCED_PARAMETER(lpParameter);
do {
waitret = WaitForMultipleObjects(3, handles, FALSE, INFINITE);
switch (waitret) {
case WAIT_OBJECT_0:
case WAIT_OBJECT_0+1:
waitret2 = WaitForSingleObject(mutex, INFINITE);
if (waitret2 == WAIT_OBJECT_0) {
FillBuffer(WAIT_OBJECT_0 + 1 - waitret);
ReleaseMutex(mutex);
} else {
if (MV_Printf)
MV_Printf( "DirectSound fillDataThread: wfso err %d\n", (int32_t) waitret2);
}
break;
case WAIT_OBJECT_0+2:
// initprintf( "DirectSound fillDataThread: exiting\n");
ExitThread(0);
break;
default:
if (MV_Printf)
MV_Printf( "DirectSound fillDataThread: wfmo err %d\n", (int32_t) waitret);
break;
HANDLE handles[MIXBUFFERPOSITIONS+1];
for (int i = 0; i < ARRAY_SSIZE(handles); i++)
handles[i] = notifyPositions[i].hEventNotify;
do
{
DWORD const waitret = WaitForMultipleObjects(MIXBUFFERPOSITIONS, handles, FALSE, INFINITE);
if (waitret >= WAIT_OBJECT_0 && waitret < WAIT_OBJECT_0+MIXBUFFERPOSITIONS)
{
DWORD const waitret2 = WaitForSingleObject(mutex, INFINITE);
if (waitret2 == WAIT_OBJECT_0)
{
FillBuffer((waitret + MIXBUFFERPOSITIONS - 1 - WAIT_OBJECT_0) % MIXBUFFERPOSITIONS);
ReleaseMutex(mutex);
}
else if (MV_Printf)
MV_Printf("DirectSound fillDataThread: wfso err %d\n", (int32_t)waitret2);
}
} while (1);
else
{
switch (waitret)
{
case WAIT_OBJECT_0 + MIXBUFFERPOSITIONS:
ExitThread(0);
break;
default:
if (MV_Printf)
MV_Printf("DirectSound fillDataThread: wfmo err %d\n", (int32_t)waitret);
break;
}
}
}
while (1);
return 0;
}
static void TeardownDSound(HRESULT err)
{
if (FAILED(err))
{
if (MV_Printf)
MV_Printf("Dying error: %x\n", (uint32_t)err);
}
if (lpdsnotify)
IDirectSoundNotify_Release(lpdsnotify), lpdsnotify = NULL;
for (int i = 0; i < MIXBUFFERPOSITIONS + 1; i++)
{
if (notifyPositions[i].hEventNotify)
CloseHandle(notifyPositions[i].hEventNotify);
notifyPositions[i].hEventNotify = 0;
}
if (mutex)
CloseHandle(mutex), mutex = NULL;
if (lpdsbsec)
IDirectSoundBuffer_Release(lpdsbsec), lpdsbsec = NULL;
if (lpdsbprimary)
IDirectSoundBuffer_Release(lpdsbprimary), lpdsbprimary = NULL;
if (lpds)
IDirectSound_Release(lpds), lpds = NULL;
}
#define DIRECTSOUND_ERROR(err, code) \
do \
{ \
TeardownDSound(err); \
ErrorCode = code; \
return DSErr_Error; \
} while (0)
int32_t DirectSoundDrv_PCM_Init(int32_t *mixrate, int32_t *numchannels, void * initdata)
{
HRESULT err;
DSBUFFERDESC bufdesc = {};
WAVEFORMATEX wfex = {};
if (Initialised)
DirectSoundDrv_PCM_Shutdown();
if (FAILED(err = DirectSoundCreate(0, &lpds, 0)))
DIRECTSOUND_ERROR(err, DSErr_DirectSoundCreate);
if (FAILED(err = IDirectSound_SetCooperativeLevel(lpds, (HWND) initdata, DSSCL_PRIORITY)))
DIRECTSOUND_ERROR(err, DSErr_SetCooperativeLevel);
bufdesc.dwSize = sizeof(DSBUFFERDESC);
bufdesc.dwFlags = DSBCAPS_LOCSOFTWARE | DSBCAPS_PRIMARYBUFFER | DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_STICKYFOCUS;
if (FAILED(err = IDirectSound_CreateSoundBuffer(lpds, &bufdesc, &lpdsbprimary, 0)))
DIRECTSOUND_ERROR(err, DSErr_CreateSoundBuffer);
wfex.wFormatTag = WAVE_FORMAT_PCM;
wfex.nChannels = *numchannels;
wfex.nSamplesPerSec = *mixrate;
wfex.wBitsPerSample = 16;
wfex.nBlockAlign = wfex.nChannels * wfex.wBitsPerSample / 8;
wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
if (FAILED(err = IDirectSoundBuffer_SetFormat(lpdsbprimary, &wfex)))
DIRECTSOUND_ERROR(err, DSErr_SetFormat);
bufdesc.dwFlags = DSBCAPS_LOCSOFTWARE | DSBCAPS_CTRLPOSITIONNOTIFY | DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_STICKYFOCUS;
bufdesc.dwBufferBytes = wfex.nBlockAlign * 2048 * 2;
bufdesc.lpwfxFormat = &wfex;
if (FAILED(err = IDirectSound_CreateSoundBuffer(lpds, &bufdesc, &lpdsbsec, 0)))
DIRECTSOUND_ERROR(err, DSErr_CreateSoundBufferSecondary);
if (FAILED(err = IDirectSoundBuffer_QueryInterface(lpdsbsec, &IID_IDirectSoundNotify, (LPVOID *)&lpdsnotify)))
DIRECTSOUND_ERROR(err, DSErr_Notify);
for (int i = 0; i < MIXBUFFERPOSITIONS; i++)
{
notifyPositions[i].dwOffset = (bufdesc.dwBufferBytes/MIXBUFFERPOSITIONS)*i;
notifyPositions[i].hEventNotify = CreateEvent(NULL, FALSE, FALSE, NULL);
if (!notifyPositions[i].hEventNotify)
DIRECTSOUND_ERROR(DS_OK, DSErr_NotifyEvents);
}
notifyPositions[MIXBUFFERPOSITIONS].dwOffset = DSBPN_OFFSETSTOP;
notifyPositions[MIXBUFFERPOSITIONS].hEventNotify = CreateEvent(NULL, FALSE, FALSE, NULL);
if (FAILED(err = IDirectSoundNotify_SetNotificationPositions(lpdsnotify, MIXBUFFERPOSITIONS+1, notifyPositions)))
DIRECTSOUND_ERROR(err, DSErr_SetNotificationPositions);
if (FAILED(err = IDirectSoundBuffer_Play(lpdsbprimary, 0, 0, DSBPLAY_LOOPING)))
DIRECTSOUND_ERROR(err, DSErr_Play);
if ((mutex = CreateMutex(0, FALSE, 0)) == NULL)
DIRECTSOUND_ERROR(DS_OK, DSErr_CreateMutex);
Initialised = 1;
return DSErr_Ok;
}
#undef DIRECTSOUND_ERROR
void DirectSoundDrv_PCM_Shutdown(void)
{
if (!Initialised)
return;
DirectSoundDrv_PCM_StopPlayback();
TeardownDSound(DS_OK);
Initialised = 0;
}
int32_t DirectSoundDrv_PCM_BeginPlayback(char *BufferStart, int32_t BufferSize, int32_t NumDivisions, void (*CallBackFunc)(void))
{
if (!Initialised)
{
ErrorCode = DSErr_Uninitialised;
return DSErr_Error;
}
DirectSoundDrv_PCM_StopPlayback();
MixBuffer = BufferStart;
MixBufferSize = BufferSize;
MixBufferCount = NumDivisions;
MixBufferCurrent = 0;
MixBufferUsed = 0;
MixCallBack = CallBackFunc;
// prime the buffer
FillBuffer(0);
if ((mixThread = CreateThread(NULL, 0, fillDataThread, 0, 0, 0)) == NULL)
{
ErrorCode = DSErr_CreateThread;
return DSErr_Error;
}
SetThreadPriority(mixThread, THREAD_PRIORITY_ABOVE_NORMAL);
HRESULT err = IDirectSoundBuffer_Play(lpdsbsec, 0, 0, DSBPLAY_LOOPING);
if (FAILED(err))
{
ErrorCode = DSErr_PlaySecondary;
return DSErr_Error;
}
Playing = 1;
return DSErr_Ok;
}
void DirectSoundDrv_PCM_StopPlayback(void)
{
if (!Playing)
return;
IDirectSoundBuffer_Stop(lpdsbsec);
IDirectSoundBuffer_SetCurrentPosition(lpdsbsec, 0);
Playing = 0;
}
void DirectSoundDrv_PCM_Lock(void)
{
DWORD const err = WaitForSingleObject(mutex, INFINITE);
if (err != WAIT_OBJECT_0)
{
if (MV_Printf)
MV_Printf("DirectSound lock: wfso %d\n", (int32_t)err);
}
}
void DirectSoundDrv_PCM_Unlock(void)
{
ReleaseMutex(mutex);
}
int32_t DirectSoundDrv_GetError(void)
{
return ErrorCode;
}
const char *DirectSoundDrv_ErrorString( int32_t ErrorNumber )
const char *DirectSoundDrv_ErrorString(int32_t ErrorNumber)
{
const char *ErrorString;
switch( ErrorNumber )
switch (ErrorNumber)
{
case DSErr_Warning :
case DSErr_Error :
ErrorString = DirectSoundDrv_ErrorString( ErrorCode );
break;
case DSErr_Warning:
case DSErr_Error:
ErrorString = DirectSoundDrv_ErrorString(ErrorCode);
break;
case DSErr_Ok :
ErrorString = "DirectSound ok.";
break;
case DSErr_Ok:
ErrorString = "DirectSound ok.";
break;
case DSErr_Uninitialised:
ErrorString = "DirectSound uninitialised.";
@ -267,229 +441,4 @@ const char *DirectSoundDrv_ErrorString( int32_t ErrorNumber )
}
return ErrorString;
}
static void TeardownDSound(HRESULT err)
{
if (FAILED(err)) {
if (MV_Printf)
MV_Printf( "Dying error: %x\n", (uint32_t) err);
}
if (lpdsnotify) IDirectSoundNotify_Release(lpdsnotify);
if (notifyPositions[0].hEventNotify) CloseHandle(notifyPositions[0].hEventNotify);
if (notifyPositions[1].hEventNotify) CloseHandle(notifyPositions[1].hEventNotify);
if (notifyPositions[2].hEventNotify) CloseHandle(notifyPositions[2].hEventNotify);
if (mutex) CloseHandle(mutex);
if (lpdsbsec) IDirectSoundBuffer_Release(lpdsbsec);
if (lpdsbprimary) IDirectSoundBuffer_Release(lpdsbprimary);
if (lpds) IDirectSound_Release(lpds);
notifyPositions[0].hEventNotify =
notifyPositions[1].hEventNotify =
notifyPositions[2].hEventNotify = 0;
mutex = NULL;
lpdsnotify = NULL;
lpdsbsec = NULL;
lpdsbprimary = NULL;
lpds = NULL;
}
int32_t DirectSoundDrv_PCM_Init(int32_t *mixrate, int32_t *numchannels, void * initdata)
{
HRESULT err;
DSBUFFERDESC bufdesc;
WAVEFORMATEX wfex;
if (Initialised) {
DirectSoundDrv_PCM_Shutdown();
}
err = DirectSoundCreate(0, &lpds, 0);
if (FAILED( err )) {
ErrorCode = DSErr_DirectSoundCreate;
return DSErr_Error;
}
err = IDirectSound_SetCooperativeLevel(lpds, (HWND) initdata, DSSCL_PRIORITY);
if (FAILED( err )) {
TeardownDSound(err);
ErrorCode = DSErr_SetCooperativeLevel;
return DSErr_Error;
}
memset(&bufdesc, 0, sizeof(DSBUFFERDESC));
bufdesc.dwSize = sizeof(DSBUFFERDESC);
bufdesc.dwFlags = DSBCAPS_LOCSOFTWARE |
DSBCAPS_PRIMARYBUFFER |
DSBCAPS_GETCURRENTPOSITION2 |
DSBCAPS_STICKYFOCUS ;
err = IDirectSound_CreateSoundBuffer(lpds, &bufdesc, &lpdsbprimary, 0);
if (FAILED( err )) {
TeardownDSound(err);
ErrorCode = DSErr_CreateSoundBuffer;
return DSErr_Error;
}
memset(&wfex, 0, sizeof(WAVEFORMATEX));
wfex.wFormatTag = WAVE_FORMAT_PCM;
wfex.nChannels = *numchannels;
wfex.nSamplesPerSec = *mixrate;
wfex.wBitsPerSample = 16;
wfex.nBlockAlign = wfex.nChannels * wfex.wBitsPerSample / 8;
wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
err = IDirectSoundBuffer_SetFormat(lpdsbprimary, &wfex);
if (FAILED( err )) {
TeardownDSound(err);
ErrorCode = DSErr_SetFormat;
return DSErr_Error;
}
bufdesc.dwFlags = DSBCAPS_LOCSOFTWARE |
DSBCAPS_CTRLPOSITIONNOTIFY |
DSBCAPS_GETCURRENTPOSITION2 |
DSBCAPS_STICKYFOCUS ;
bufdesc.dwBufferBytes = wfex.nBlockAlign * 2560 * 2;
bufdesc.lpwfxFormat = &wfex;
err = IDirectSound_CreateSoundBuffer(lpds, &bufdesc, &lpdsbsec, 0);
if (FAILED( err )) {
TeardownDSound(err);
ErrorCode = DSErr_SetFormatSecondary;
return DSErr_Error;
}
err = IDirectSoundBuffer_QueryInterface(lpdsbsec, &IID_IDirectSoundNotify,
(LPVOID *) &lpdsnotify);
if (FAILED( err )) {
TeardownDSound(err);
ErrorCode = DSErr_Notify;
return DSErr_Error;
}
notifyPositions[0].dwOffset = 0;
notifyPositions[0].hEventNotify = CreateEvent(NULL, FALSE, FALSE, NULL);
notifyPositions[1].dwOffset = bufdesc.dwBufferBytes / 2;
notifyPositions[1].hEventNotify = CreateEvent(NULL, FALSE, FALSE, NULL);
notifyPositions[2].dwOffset = DSBPN_OFFSETSTOP;
notifyPositions[2].hEventNotify = CreateEvent(NULL, FALSE, FALSE, NULL);
if (!notifyPositions[0].hEventNotify ||
!notifyPositions[1].hEventNotify ||
!notifyPositions[2].hEventNotify) {
TeardownDSound(DS_OK);
ErrorCode = DSErr_NotifyEvents;
return DSErr_Error;
}
err = IDirectSoundNotify_SetNotificationPositions(lpdsnotify, 3, notifyPositions);
if (FAILED( err )) {
TeardownDSound(err);
ErrorCode = DSErr_SetNotificationPositions;
return DSErr_Error;
}
err = IDirectSoundBuffer_Play(lpdsbprimary, 0, 0, DSBPLAY_LOOPING);
if (FAILED( err )) {
TeardownDSound(err);
ErrorCode = DSErr_Play;
return DSErr_Error;
}
mutex = CreateMutex(0, FALSE, 0);
if (!mutex) {
TeardownDSound(DS_OK);
ErrorCode = DSErr_CreateMutex;
return DSErr_Error;
}
Initialised = 1;
// initprintf("DirectSound Init: yay\n");
return DSErr_Ok;
}
void DirectSoundDrv_PCM_Shutdown(void)
{
if (!Initialised) {
return;
}
DirectSoundDrv_PCM_StopPlayback();
TeardownDSound(DS_OK);
Initialised = 0;
}
int32_t DirectSoundDrv_PCM_BeginPlayback(char *BufferStart, int32_t BufferSize,
int32_t NumDivisions, void ( *CallBackFunc )( void ) )
{
HRESULT err;
if (!Initialised) {
ErrorCode = DSErr_Uninitialised;
return DSErr_Error;
}
DirectSoundDrv_PCM_StopPlayback();
MixBuffer = BufferStart;
MixBufferSize = BufferSize;
MixBufferCount = NumDivisions;
MixBufferCurrent = 0;
MixBufferUsed = 0;
MixCallBack = CallBackFunc;
// prime the buffer
FillBuffer(0);
mixThread = CreateThread(NULL, 0, fillDataThread, 0, 0, 0);
if (!mixThread) {
ErrorCode = DSErr_CreateThread;
return DSErr_Error;
}
SetThreadPriority(mixThread, THREAD_PRIORITY_ABOVE_NORMAL);
err = IDirectSoundBuffer_Play(lpdsbsec, 0, 0, DSBPLAY_LOOPING);
if (FAILED( err )) {
ErrorCode = DSErr_PlaySecondary;
return DSErr_Error;
}
Playing = 1;
return DSErr_Ok;
}
void DirectSoundDrv_PCM_StopPlayback(void)
{
if (!Playing) {
return;
}
IDirectSoundBuffer_Stop(lpdsbsec);
IDirectSoundBuffer_SetCurrentPosition(lpdsbsec, 0);
Playing = 0;
}
void DirectSoundDrv_PCM_Lock(void)
{
DWORD err;
err = WaitForSingleObject(mutex, INFINITE);
if (err != WAIT_OBJECT_0) {
if (MV_Printf)
MV_Printf( "DirectSound lock: wfso %d\n", (int32_t) err);
}
}
void DirectSoundDrv_PCM_Unlock(void)
{
ReleaseMutex(mutex);
}

View File

@ -20,12 +20,33 @@
#include "inttypes.h"
enum
{
DSErr_Warning = -2,
DSErr_Error = -1,
DSErr_Ok = 0,
DSErr_Uninitialised,
DSErr_DirectSoundCreate,
DSErr_SetCooperativeLevel,
DSErr_CreateSoundBuffer,
DSErr_CreateSoundBufferSecondary,
DSErr_SetFormat,
DSErr_SetFormatSecondary,
DSErr_Notify,
DSErr_NotifyEvents,
DSErr_SetNotificationPositions,
DSErr_Play,
DSErr_PlaySecondary,
DSErr_CreateThread,
DSErr_CreateMutex
};
int32_t DirectSoundDrv_GetError(void);
const char *DirectSoundDrv_ErrorString( int32_t ErrorNumber );
int32_t DirectSoundDrv_PCM_Init(int32_t *mixrate, int32_t *numchannels, void * initdata);
void DirectSoundDrv_PCM_Shutdown(void);
int32_t DirectSoundDrv_PCM_BeginPlayback(char *BufferStart, int32_t BufferSize,
int32_t NumDivisions, void ( *CallBackFunc )( void ) );
void DirectSoundDrv_PCM_StopPlayback(void);
void DirectSoundDrv_PCM_Lock(void);
void DirectSoundDrv_PCM_Unlock(void);
const char *DirectSoundDrv_ErrorString(int32_t ErrorNumber);
int32_t DirectSoundDrv_PCM_Init(int32_t *mixrate, int32_t *numchannels, void *initdata);
int32_t DirectSoundDrv_PCM_BeginPlayback(char *BufferStart, int32_t BufferSize, int32_t NumDivisions, void (*CallBackFunc)(void));
void DirectSoundDrv_PCM_StopPlayback(void);
void DirectSoundDrv_PCM_Lock(void);
void DirectSoundDrv_PCM_Unlock(void);
void DirectSoundDrv_PCM_Shutdown(void);