diff src/audio/windx5/SDL_dx5audio.c @ 1662:782fd950bd46 SDL-1.3

Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents d910939febfa
children 4da1ee79c9af
line wrap: on
line diff
--- a/src/audio/windx5/SDL_dx5audio.c	Sun May 21 17:27:13 2006 +0000
+++ b/src/audio/windx5/SDL_dx5audio.c	Sun May 28 13:04:16 2006 +0000
@@ -32,664 +32,693 @@
 //#define USE_POSITION_NOTIFY
 
 /* DirectX function pointers for audio */
-HRESULT (WINAPI *DSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
+HRESULT (WINAPI * DSoundCreate) (LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 
 /* Audio driver functions */
-static int DX5_OpenAudio(_THIS, SDL_AudioSpec *spec);
-static void DX5_ThreadInit(_THIS);
-static void DX5_WaitAudio_BusyWait(_THIS);
+static int DX5_OpenAudio (_THIS, SDL_AudioSpec * spec);
+static void DX5_ThreadInit (_THIS);
+static void DX5_WaitAudio_BusyWait (_THIS);
 #ifdef USE_POSITION_NOTIFY
-static void DX6_WaitAudio_EventWait(_THIS);
+static void DX6_WaitAudio_EventWait (_THIS);
 #endif
-static void DX5_PlayAudio(_THIS);
-static Uint8 *DX5_GetAudioBuf(_THIS);
-static void DX5_WaitDone(_THIS);
-static void DX5_CloseAudio(_THIS);
+static void DX5_PlayAudio (_THIS);
+static Uint8 *DX5_GetAudioBuf (_THIS);
+static void DX5_WaitDone (_THIS);
+static void DX5_CloseAudio (_THIS);
 
 /* Audio driver bootstrap functions */
 
-static int Audio_Available(void)
+static int
+Audio_Available (void)
 {
-	HINSTANCE DSoundDLL;
-	int dsound_ok;
+    HINSTANCE DSoundDLL;
+    int dsound_ok;
 
-	/* Version check DSOUND.DLL (Is DirectX okay?) */
-	dsound_ok = 0;
-	DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL"));
-	if ( DSoundDLL != NULL ) {
-		/* We just use basic DirectSound, we're okay */
-		/* Yay! */
-		/* Unfortunately, the sound drivers on NT have
-		   higher latencies than the audio buffers used
-		   by many SDL applications, so there are gaps
-		   in the audio - it sounds terrible.  Punt for now.
-		 */
-		OSVERSIONINFO ver;
-		ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
-		GetVersionEx(&ver);
-		switch (ver.dwPlatformId) {
-			case VER_PLATFORM_WIN32_NT:
-				if ( ver.dwMajorVersion > 4 ) {
-					/* Win2K */
-					dsound_ok = 1;
-				} else {
-					/* WinNT */
-					dsound_ok = 0;
-				}
-				break;
-			default:
-				/* Win95 or Win98 */
-				dsound_ok = 1;
-				break;
-		}
-		/* Now check for DirectX 5 or better - otherwise
-		 * we will fail later in DX5_OpenAudio without a chance
-		 * to fall back to the DIB driver. */
-		if (dsound_ok) {
-			/* DirectSoundCaptureCreate was added in DX5 */
-			if (!GetProcAddress(DSoundDLL, TEXT("DirectSoundCaptureCreate")))
-				dsound_ok = 0;
+    /* Version check DSOUND.DLL (Is DirectX okay?) */
+    dsound_ok = 0;
+    DSoundDLL = LoadLibrary (TEXT ("DSOUND.DLL"));
+    if (DSoundDLL != NULL) {
+        /* We just use basic DirectSound, we're okay */
+        /* Yay! */
+        /* Unfortunately, the sound drivers on NT have
+           higher latencies than the audio buffers used
+           by many SDL applications, so there are gaps
+           in the audio - it sounds terrible.  Punt for now.
+         */
+        OSVERSIONINFO ver;
+        ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
+        GetVersionEx (&ver);
+        switch (ver.dwPlatformId) {
+        case VER_PLATFORM_WIN32_NT:
+            if (ver.dwMajorVersion > 4) {
+                /* Win2K */
+                dsound_ok = 1;
+            } else {
+                /* WinNT */
+                dsound_ok = 0;
+            }
+            break;
+        default:
+            /* Win95 or Win98 */
+            dsound_ok = 1;
+            break;
+        }
+        /* Now check for DirectX 5 or better - otherwise
+         * we will fail later in DX5_OpenAudio without a chance
+         * to fall back to the DIB driver. */
+        if (dsound_ok) {
+            /* DirectSoundCaptureCreate was added in DX5 */
+            if (!GetProcAddress
+                (DSoundDLL, TEXT ("DirectSoundCaptureCreate")))
+                dsound_ok = 0;
 
-		}
-		/* Clean up.. */
-		FreeLibrary(DSoundDLL);
-	}
-	return(dsound_ok);
+        }
+        /* Clean up.. */
+        FreeLibrary (DSoundDLL);
+    }
+    return (dsound_ok);
 }
 
 /* Functions for loading the DirectX functions dynamically */
 static HINSTANCE DSoundDLL = NULL;
 
-static void DX5_Unload(void)
+static void
+DX5_Unload (void)
 {
-	if ( DSoundDLL != NULL ) {
-		FreeLibrary(DSoundDLL);
-		DSoundCreate = NULL;
-		DSoundDLL = NULL;
-	}
+    if (DSoundDLL != NULL) {
+        FreeLibrary (DSoundDLL);
+        DSoundCreate = NULL;
+        DSoundDLL = NULL;
+    }
 }
-static int DX5_Load(void)
+static int
+DX5_Load (void)
 {
-	int status;
+    int status;
 
-	DX5_Unload();
-	DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL"));
-	if ( DSoundDLL != NULL ) {
-		DSoundCreate = (void *)GetProcAddress(DSoundDLL,
-					TEXT("DirectSoundCreate"));
-	}
-	if ( DSoundDLL && DSoundCreate ) {
-		status = 0;
-	} else {
-		DX5_Unload();
-		status = -1;
-	}
-	return status;
+    DX5_Unload ();
+    DSoundDLL = LoadLibrary (TEXT ("DSOUND.DLL"));
+    if (DSoundDLL != NULL) {
+        DSoundCreate = (void *) GetProcAddress (DSoundDLL,
+                                                TEXT ("DirectSoundCreate"));
+    }
+    if (DSoundDLL && DSoundCreate) {
+        status = 0;
+    } else {
+        DX5_Unload ();
+        status = -1;
+    }
+    return status;
 }
 
-static void Audio_DeleteDevice(SDL_AudioDevice *device)
+static void
+Audio_DeleteDevice (SDL_AudioDevice * device)
 {
-	DX5_Unload();
-	SDL_free(device->hidden);
-	SDL_free(device);
+    DX5_Unload ();
+    SDL_free (device->hidden);
+    SDL_free (device);
 }
 
-static SDL_AudioDevice *Audio_CreateDevice(int devindex)
+static SDL_AudioDevice *
+Audio_CreateDevice (int devindex)
 {
-	SDL_AudioDevice *this;
+    SDL_AudioDevice *this;
 
-	/* Load DirectX */
-	if ( DX5_Load() < 0 ) {
-		return(NULL);
-	}
+    /* Load DirectX */
+    if (DX5_Load () < 0) {
+        return (NULL);
+    }
 
-	/* Initialize all variables that we clean on shutdown */
-	this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
-	if ( this ) {
-		SDL_memset(this, 0, (sizeof *this));
-		this->hidden = (struct SDL_PrivateAudioData *)
-				SDL_malloc((sizeof *this->hidden));
-	}
-	if ( (this == NULL) || (this->hidden == NULL) ) {
-		SDL_OutOfMemory();
-		if ( this ) {
-			SDL_free(this);
-		}
-		return(0);
-	}
-	SDL_memset(this->hidden, 0, (sizeof *this->hidden));
+    /* Initialize all variables that we clean on shutdown */
+    this = (SDL_AudioDevice *) SDL_malloc (sizeof (SDL_AudioDevice));
+    if (this) {
+        SDL_memset (this, 0, (sizeof *this));
+        this->hidden = (struct SDL_PrivateAudioData *)
+            SDL_malloc ((sizeof *this->hidden));
+    }
+    if ((this == NULL) || (this->hidden == NULL)) {
+        SDL_OutOfMemory ();
+        if (this) {
+            SDL_free (this);
+        }
+        return (0);
+    }
+    SDL_memset (this->hidden, 0, (sizeof *this->hidden));
 
-	/* Set the function pointers */
-	this->OpenAudio = DX5_OpenAudio;
-	this->ThreadInit = DX5_ThreadInit;
-	this->WaitAudio = DX5_WaitAudio_BusyWait;
-	this->PlayAudio = DX5_PlayAudio;
-	this->GetAudioBuf = DX5_GetAudioBuf;
-	this->WaitDone = DX5_WaitDone;
-	this->CloseAudio = DX5_CloseAudio;
+    /* Set the function pointers */
+    this->OpenAudio = DX5_OpenAudio;
+    this->ThreadInit = DX5_ThreadInit;
+    this->WaitAudio = DX5_WaitAudio_BusyWait;
+    this->PlayAudio = DX5_PlayAudio;
+    this->GetAudioBuf = DX5_GetAudioBuf;
+    this->WaitDone = DX5_WaitDone;
+    this->CloseAudio = DX5_CloseAudio;
 
-	this->free = Audio_DeleteDevice;
+    this->free = Audio_DeleteDevice;
 
-	return this;
+    return this;
 }
 
 AudioBootStrap DSOUND_bootstrap = {
-	"dsound", "Win95/98/2000 DirectSound",
-	Audio_Available, Audio_CreateDevice
+    "dsound", "Win95/98/2000 DirectSound",
+    Audio_Available, Audio_CreateDevice
 };
 
-static void SetDSerror(const char *function, int code)
+static void
+SetDSerror (const char *function, int code)
 {
-	static const char *error;
-	static char  errbuf[1024];
+    static const char *error;
+    static char errbuf[1024];
 
-	errbuf[0] = 0;
-	switch (code) {
-		case E_NOINTERFACE:
-			error = 
-		"Unsupported interface\n-- Is DirectX 5.0 or later installed?";
-			break;
-		case DSERR_ALLOCATED:
-			error = "Audio device in use";
-			break;
-		case DSERR_BADFORMAT:
-			error = "Unsupported audio format";
-			break;
-		case DSERR_BUFFERLOST:
-			error = "Mixing buffer was lost";
-			break;
-		case DSERR_CONTROLUNAVAIL:
-			error = "Control requested is not available";
-			break;
-		case DSERR_INVALIDCALL:
-			error = "Invalid call for the current state";
-			break;
-		case DSERR_INVALIDPARAM:
-			error = "Invalid parameter";
-			break;
-		case DSERR_NODRIVER:
-			error = "No audio device found";
-			break;
-		case DSERR_OUTOFMEMORY:
-			error = "Out of memory";
-			break;
-		case DSERR_PRIOLEVELNEEDED:
-			error = "Caller doesn't have priority";
-			break;
-		case DSERR_UNSUPPORTED:
-			error = "Function not supported";
-			break;
-		default:
-			SDL_snprintf(errbuf, SDL_arraysize(errbuf),
-			         "%s: Unknown DirectSound error: 0x%x",
-								function, code);
-			break;
-	}
-	if ( ! errbuf[0] ) {
-		SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error);
-	}
-	SDL_SetError("%s", errbuf);
-	return;
+    errbuf[0] = 0;
+    switch (code) {
+    case E_NOINTERFACE:
+        error =
+            "Unsupported interface\n-- Is DirectX 5.0 or later installed?";
+        break;
+    case DSERR_ALLOCATED:
+        error = "Audio device in use";
+        break;
+    case DSERR_BADFORMAT:
+        error = "Unsupported audio format";
+        break;
+    case DSERR_BUFFERLOST:
+        error = "Mixing buffer was lost";
+        break;
+    case DSERR_CONTROLUNAVAIL:
+        error = "Control requested is not available";
+        break;
+    case DSERR_INVALIDCALL:
+        error = "Invalid call for the current state";
+        break;
+    case DSERR_INVALIDPARAM:
+        error = "Invalid parameter";
+        break;
+    case DSERR_NODRIVER:
+        error = "No audio device found";
+        break;
+    case DSERR_OUTOFMEMORY:
+        error = "Out of memory";
+        break;
+    case DSERR_PRIOLEVELNEEDED:
+        error = "Caller doesn't have priority";
+        break;
+    case DSERR_UNSUPPORTED:
+        error = "Function not supported";
+        break;
+    default:
+        SDL_snprintf (errbuf, SDL_arraysize (errbuf),
+                      "%s: Unknown DirectSound error: 0x%x", function, code);
+        break;
+    }
+    if (!errbuf[0]) {
+        SDL_snprintf (errbuf, SDL_arraysize (errbuf), "%s: %s", function,
+                      error);
+    }
+    SDL_SetError ("%s", errbuf);
+    return;
 }
 
 /* DirectSound needs to be associated with a window */
 static HWND mainwin = NULL;
 /* */
-void DX5_SoundFocus(HWND hwnd)
+void
+DX5_SoundFocus (HWND hwnd)
 {
-	mainwin = hwnd;
+    mainwin = hwnd;
 }
 
-static void DX5_ThreadInit(_THIS)
+static void
+DX5_ThreadInit (_THIS)
 {
-	SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
+    SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_HIGHEST);
 }
 
-static void DX5_WaitAudio_BusyWait(_THIS)
+static void
+DX5_WaitAudio_BusyWait (_THIS)
 {
-	DWORD status;
-	DWORD cursor, junk;
-	HRESULT result;
+    DWORD status;
+    DWORD cursor, junk;
+    HRESULT result;
 
-	/* Semi-busy wait, since we have no way of getting play notification
-	   on a primary mixing buffer located in hardware (DirectX 5.0)
-	*/
-	result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &cursor, &junk);
-	if ( result != DS_OK ) {
-		if ( result == DSERR_BUFFERLOST ) {
-			IDirectSoundBuffer_Restore(mixbuf);
-		}
+    /* Semi-busy wait, since we have no way of getting play notification
+       on a primary mixing buffer located in hardware (DirectX 5.0)
+     */
+    result = IDirectSoundBuffer_GetCurrentPosition (mixbuf, &cursor, &junk);
+    if (result != DS_OK) {
+        if (result == DSERR_BUFFERLOST) {
+            IDirectSoundBuffer_Restore (mixbuf);
+        }
 #ifdef DEBUG_SOUND
-		SetDSerror("DirectSound GetCurrentPosition", result);
+        SetDSerror ("DirectSound GetCurrentPosition", result);
 #endif
-		return;
-	}
-	cursor /= mixlen;
+        return;
+    }
+    cursor /= mixlen;
 
-	while ( cursor == playing ) {
-		/* FIXME: find out how much time is left and sleep that long */
-		SDL_Delay(10);
+    while (cursor == playing) {
+        /* FIXME: find out how much time is left and sleep that long */
+        SDL_Delay (10);
 
-		/* Try to restore a lost sound buffer */
-		IDirectSoundBuffer_GetStatus(mixbuf, &status);
-		if ( (status&DSBSTATUS_BUFFERLOST) ) {
-			IDirectSoundBuffer_Restore(mixbuf);
-			IDirectSoundBuffer_GetStatus(mixbuf, &status);
-			if ( (status&DSBSTATUS_BUFFERLOST) ) {
-				break;
-			}
-		}
-		if ( ! (status&DSBSTATUS_PLAYING) ) {
-			result = IDirectSoundBuffer_Play(mixbuf, 0, 0, DSBPLAY_LOOPING);
-			if ( result == DS_OK ) {
-				continue;
-			}
+        /* Try to restore a lost sound buffer */
+        IDirectSoundBuffer_GetStatus (mixbuf, &status);
+        if ((status & DSBSTATUS_BUFFERLOST)) {
+            IDirectSoundBuffer_Restore (mixbuf);
+            IDirectSoundBuffer_GetStatus (mixbuf, &status);
+            if ((status & DSBSTATUS_BUFFERLOST)) {
+                break;
+            }
+        }
+        if (!(status & DSBSTATUS_PLAYING)) {
+            result = IDirectSoundBuffer_Play (mixbuf, 0, 0, DSBPLAY_LOOPING);
+            if (result == DS_OK) {
+                continue;
+            }
 #ifdef DEBUG_SOUND
-			SetDSerror("DirectSound Play", result);
+            SetDSerror ("DirectSound Play", result);
 #endif
-			return;
-		}
+            return;
+        }
 
-		/* Find out where we are playing */
-		result = IDirectSoundBuffer_GetCurrentPosition(mixbuf,
-								&cursor, &junk);
-		if ( result != DS_OK ) {
-			SetDSerror("DirectSound GetCurrentPosition", result);
-			return;
-		}
-		cursor /= mixlen;
-	}
+        /* Find out where we are playing */
+        result = IDirectSoundBuffer_GetCurrentPosition (mixbuf,
+                                                        &cursor, &junk);
+        if (result != DS_OK) {
+            SetDSerror ("DirectSound GetCurrentPosition", result);
+            return;
+        }
+        cursor /= mixlen;
+    }
 }
 
 #ifdef USE_POSITION_NOTIFY
-static void DX6_WaitAudio_EventWait(_THIS)
+static void
+DX6_WaitAudio_EventWait (_THIS)
 {
-	DWORD status;
-	HRESULT result;
+    DWORD status;
+    HRESULT result;
 
-	/* Try to restore a lost sound buffer */
-	IDirectSoundBuffer_GetStatus(mixbuf, &status);
-	if ( (status&DSBSTATUS_BUFFERLOST) ) {
-		IDirectSoundBuffer_Restore(mixbuf);
-		IDirectSoundBuffer_GetStatus(mixbuf, &status);
-		if ( (status&DSBSTATUS_BUFFERLOST) ) {
-			return;
-		}
-	}
-	if ( ! (status&DSBSTATUS_PLAYING) ) {
-		result = IDirectSoundBuffer_Play(mixbuf, 0, 0, DSBPLAY_LOOPING);
-		if ( result != DS_OK ) {
+    /* Try to restore a lost sound buffer */
+    IDirectSoundBuffer_GetStatus (mixbuf, &status);
+    if ((status & DSBSTATUS_BUFFERLOST)) {
+        IDirectSoundBuffer_Restore (mixbuf);
+        IDirectSoundBuffer_GetStatus (mixbuf, &status);
+        if ((status & DSBSTATUS_BUFFERLOST)) {
+            return;
+        }
+    }
+    if (!(status & DSBSTATUS_PLAYING)) {
+        result = IDirectSoundBuffer_Play (mixbuf, 0, 0, DSBPLAY_LOOPING);
+        if (result != DS_OK) {
 #ifdef DEBUG_SOUND
-			SetDSerror("DirectSound Play", result);
+            SetDSerror ("DirectSound Play", result);
 #endif
-			return;
-		}
-	}
-	WaitForSingleObject(audio_event, INFINITE);
+            return;
+        }
+    }
+    WaitForSingleObject (audio_event, INFINITE);
 }
 #endif /* USE_POSITION_NOTIFY */
 
-static void DX5_PlayAudio(_THIS)
+static void
+DX5_PlayAudio (_THIS)
 {
-	/* Unlock the buffer, allowing it to play */
-	if ( locked_buf ) {
-		IDirectSoundBuffer_Unlock(mixbuf, locked_buf, mixlen, NULL, 0);
-	}
+    /* Unlock the buffer, allowing it to play */
+    if (locked_buf) {
+        IDirectSoundBuffer_Unlock (mixbuf, locked_buf, mixlen, NULL, 0);
+    }
 
 }
 
-static Uint8 *DX5_GetAudioBuf(_THIS)
+static Uint8 *
+DX5_GetAudioBuf (_THIS)
 {
-	DWORD   cursor, junk;
-	HRESULT result;
-	DWORD   rawlen;
+    DWORD cursor, junk;
+    HRESULT result;
+    DWORD rawlen;
 
-	/* Figure out which blocks to fill next */
-	locked_buf = NULL;
-	result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &cursor, &junk);
-	if ( result == DSERR_BUFFERLOST ) {
-		IDirectSoundBuffer_Restore(mixbuf);
-		result = IDirectSoundBuffer_GetCurrentPosition(mixbuf,
-								&cursor, &junk);
-	}
-	if ( result != DS_OK ) {
-		SetDSerror("DirectSound GetCurrentPosition", result);
-		return(NULL);
-	}
-	cursor /= mixlen;
-	playing = cursor;
-	cursor = (cursor+1)%NUM_BUFFERS;
-	cursor *= mixlen;
+    /* Figure out which blocks to fill next */
+    locked_buf = NULL;
+    result = IDirectSoundBuffer_GetCurrentPosition (mixbuf, &cursor, &junk);
+    if (result == DSERR_BUFFERLOST) {
+        IDirectSoundBuffer_Restore (mixbuf);
+        result = IDirectSoundBuffer_GetCurrentPosition (mixbuf,
+                                                        &cursor, &junk);
+    }
+    if (result != DS_OK) {
+        SetDSerror ("DirectSound GetCurrentPosition", result);
+        return (NULL);
+    }
+    cursor /= mixlen;
+    playing = cursor;
+    cursor = (cursor + 1) % NUM_BUFFERS;
+    cursor *= mixlen;
 
-	/* Lock the audio buffer */
-	result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen,
-				(LPVOID *)&locked_buf, &rawlen, NULL, &junk, 0);
-	if ( result == DSERR_BUFFERLOST ) {
-		IDirectSoundBuffer_Restore(mixbuf);
-		result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen,
-				(LPVOID *)&locked_buf, &rawlen, NULL, &junk, 0);
-	}
-	if ( result != DS_OK ) {
-		SetDSerror("DirectSound Lock", result);
-		return(NULL);
-	}
-	return(locked_buf);
+    /* Lock the audio buffer */
+    result = IDirectSoundBuffer_Lock (mixbuf, cursor, mixlen,
+                                      (LPVOID *) & locked_buf, &rawlen, NULL,
+                                      &junk, 0);
+    if (result == DSERR_BUFFERLOST) {
+        IDirectSoundBuffer_Restore (mixbuf);
+        result = IDirectSoundBuffer_Lock (mixbuf, cursor, mixlen,
+                                          (LPVOID *) & locked_buf, &rawlen,
+                                          NULL, &junk, 0);
+    }
+    if (result != DS_OK) {
+        SetDSerror ("DirectSound Lock", result);
+        return (NULL);
+    }
+    return (locked_buf);
 }
 
-static void DX5_WaitDone(_THIS)
+static void
+DX5_WaitDone (_THIS)
 {
-	Uint8 *stream;
+    Uint8 *stream;
 
-	/* Wait for the playing chunk to finish */
-	stream = this->GetAudioBuf(this);
-	if ( stream != NULL ) {
-		SDL_memset(stream, silence, mixlen);
-		this->PlayAudio(this);
-	}
-	this->WaitAudio(this);
+    /* Wait for the playing chunk to finish */
+    stream = this->GetAudioBuf (this);
+    if (stream != NULL) {
+        SDL_memset (stream, silence, mixlen);
+        this->PlayAudio (this);
+    }
+    this->WaitAudio (this);
 
-	/* Stop the looping sound buffer */
-	IDirectSoundBuffer_Stop(mixbuf);
+    /* Stop the looping sound buffer */
+    IDirectSoundBuffer_Stop (mixbuf);
 }
 
-static void DX5_CloseAudio(_THIS)
+static void
+DX5_CloseAudio (_THIS)
 {
-	if ( sound != NULL ) {
-		if ( mixbuf != NULL ) {
-			/* Clean up the audio buffer */
-			IDirectSoundBuffer_Release(mixbuf);
-			mixbuf = NULL;
-		}
-		if ( audio_event != NULL ) {
-			CloseHandle(audio_event);
-			audio_event = NULL;
-		}
-		IDirectSound_Release(sound);
-		sound = NULL;
-	}
+    if (sound != NULL) {
+        if (mixbuf != NULL) {
+            /* Clean up the audio buffer */
+            IDirectSoundBuffer_Release (mixbuf);
+            mixbuf = NULL;
+        }
+        if (audio_event != NULL) {
+            CloseHandle (audio_event);
+            audio_event = NULL;
+        }
+        IDirectSound_Release (sound);
+        sound = NULL;
+    }
 }
 
 #ifdef USE_PRIMARY_BUFFER
 /* This function tries to create a primary audio buffer, and returns the
    number of audio chunks available in the created buffer.
 */
-static int CreatePrimary(LPDIRECTSOUND sndObj, HWND focus, 
-	LPDIRECTSOUNDBUFFER *sndbuf, WAVEFORMATEX *wavefmt, Uint32 chunksize)
+static int
+CreatePrimary (LPDIRECTSOUND sndObj, HWND focus,
+               LPDIRECTSOUNDBUFFER * sndbuf, WAVEFORMATEX * wavefmt,
+               Uint32 chunksize)
 {
-	HRESULT result;
-	DSBUFFERDESC format;
-	DSBCAPS caps;
-	int numchunks;
+    HRESULT result;
+    DSBUFFERDESC format;
+    DSBCAPS caps;
+    int numchunks;
 
-	/* Try to set primary mixing privileges */
-	result = IDirectSound_SetCooperativeLevel(sndObj, focus,
-							DSSCL_WRITEPRIMARY);
-	if ( result != DS_OK ) {
+    /* Try to set primary mixing privileges */
+    result = IDirectSound_SetCooperativeLevel (sndObj, focus,
+                                               DSSCL_WRITEPRIMARY);
+    if (result != DS_OK) {
 #ifdef DEBUG_SOUND
-		SetDSerror("DirectSound SetCooperativeLevel", result);
+        SetDSerror ("DirectSound SetCooperativeLevel", result);
 #endif
-		return(-1);
-	}
+        return (-1);
+    }
 
-	/* Try to create the primary buffer */
-	SDL_memset(&format, 0, sizeof(format));
-	format.dwSize = sizeof(format);
-	format.dwFlags=(DSBCAPS_PRIMARYBUFFER|DSBCAPS_GETCURRENTPOSITION2);
-	format.dwFlags |= DSBCAPS_STICKYFOCUS;
+    /* Try to create the primary buffer */
+    SDL_memset (&format, 0, sizeof (format));
+    format.dwSize = sizeof (format);
+    format.dwFlags = (DSBCAPS_PRIMARYBUFFER | DSBCAPS_GETCURRENTPOSITION2);
+    format.dwFlags |= DSBCAPS_STICKYFOCUS;
 #ifdef USE_POSITION_NOTIFY
-	format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY;
+    format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY;
 #endif
-	result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
-	if ( result != DS_OK ) {
+    result = IDirectSound_CreateSoundBuffer (sndObj, &format, sndbuf, NULL);
+    if (result != DS_OK) {
 #ifdef DEBUG_SOUND
-		SetDSerror("DirectSound CreateSoundBuffer", result);
+        SetDSerror ("DirectSound CreateSoundBuffer", result);
 #endif
-		return(-1);
-	}
+        return (-1);
+    }
 
-	/* Check the size of the fragment buffer */
-	SDL_memset(&caps, 0, sizeof(caps));
-	caps.dwSize = sizeof(caps);
-	result = IDirectSoundBuffer_GetCaps(*sndbuf, &caps);
-	if ( result != DS_OK ) {
+    /* Check the size of the fragment buffer */
+    SDL_memset (&caps, 0, sizeof (caps));
+    caps.dwSize = sizeof (caps);
+    result = IDirectSoundBuffer_GetCaps (*sndbuf, &caps);
+    if (result != DS_OK) {
 #ifdef DEBUG_SOUND
-		SetDSerror("DirectSound GetCaps", result);
+        SetDSerror ("DirectSound GetCaps", result);
 #endif
-		IDirectSoundBuffer_Release(*sndbuf);
-		return(-1);
-	}
-	if ( (chunksize > caps.dwBufferBytes) ||
-				((caps.dwBufferBytes%chunksize) != 0) ) {
-		/* The primary buffer size is not a multiple of 'chunksize'
-		   -- this hopefully doesn't happen when 'chunksize' is a 
-		      power of 2.
-		*/
-		IDirectSoundBuffer_Release(*sndbuf);
-		SDL_SetError(
-"Primary buffer size is: %d, cannot break it into chunks of %d bytes\n",
-					caps.dwBufferBytes, chunksize);
-		return(-1);
-	}
-	numchunks = (caps.dwBufferBytes/chunksize);
+        IDirectSoundBuffer_Release (*sndbuf);
+        return (-1);
+    }
+    if ((chunksize > caps.dwBufferBytes) ||
+        ((caps.dwBufferBytes % chunksize) != 0)) {
+        /* The primary buffer size is not a multiple of 'chunksize'
+           -- this hopefully doesn't happen when 'chunksize' is a 
+           power of 2.
+         */
+        IDirectSoundBuffer_Release (*sndbuf);
+        SDL_SetError
+            ("Primary buffer size is: %d, cannot break it into chunks of %d bytes\n",
+             caps.dwBufferBytes, chunksize);
+        return (-1);
+    }
+    numchunks = (caps.dwBufferBytes / chunksize);
 
-	/* Set the primary audio format */
-	result = IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt);
-	if ( result != DS_OK ) {
+    /* Set the primary audio format */
+    result = IDirectSoundBuffer_SetFormat (*sndbuf, wavefmt);
+    if (result != DS_OK) {
 #ifdef DEBUG_SOUND
-		SetDSerror("DirectSound SetFormat", result);
+        SetDSerror ("DirectSound SetFormat", result);
 #endif
-		IDirectSoundBuffer_Release(*sndbuf);
-		return(-1);
-	}
-	return(numchunks);
+        IDirectSoundBuffer_Release (*sndbuf);
+        return (-1);
+    }
+    return (numchunks);
 }
 #endif /* USE_PRIMARY_BUFFER */
 
 /* This function tries to create a secondary audio buffer, and returns the
    number of audio chunks available in the created buffer.
 */
-static int CreateSecondary(LPDIRECTSOUND sndObj, HWND focus,
-	LPDIRECTSOUNDBUFFER *sndbuf, WAVEFORMATEX *wavefmt, Uint32 chunksize)
+static int
+CreateSecondary (LPDIRECTSOUND sndObj, HWND focus,
+                 LPDIRECTSOUNDBUFFER * sndbuf, WAVEFORMATEX * wavefmt,
+                 Uint32 chunksize)
 {
-	const int numchunks = 2;
-	HRESULT result;
-	DSBUFFERDESC format;
-	LPVOID pvAudioPtr1, pvAudioPtr2;
-	DWORD  dwAudioBytes1, dwAudioBytes2;
+    const int numchunks = 2;
+    HRESULT result;
+    DSBUFFERDESC format;
+    LPVOID pvAudioPtr1, pvAudioPtr2;
+    DWORD dwAudioBytes1, dwAudioBytes2;
 
-	/* Try to set primary mixing privileges */
-	if ( focus ) {
-		result = IDirectSound_SetCooperativeLevel(sndObj,
-					focus, DSSCL_PRIORITY);
-	} else {
-		result = IDirectSound_SetCooperativeLevel(sndObj,
-					GetDesktopWindow(), DSSCL_NORMAL);
-	}
-	if ( result != DS_OK ) {
+    /* Try to set primary mixing privileges */
+    if (focus) {
+        result = IDirectSound_SetCooperativeLevel (sndObj,
+                                                   focus, DSSCL_PRIORITY);
+    } else {
+        result = IDirectSound_SetCooperativeLevel (sndObj,
+                                                   GetDesktopWindow (),
+                                                   DSSCL_NORMAL);
+    }
+    if (result != DS_OK) {
 #ifdef DEBUG_SOUND
-		SetDSerror("DirectSound SetCooperativeLevel", result);
+        SetDSerror ("DirectSound SetCooperativeLevel", result);
 #endif
-		return(-1);
-	}
+        return (-1);
+    }
 
-	/* Try to create the secondary buffer */
-	SDL_memset(&format, 0, sizeof(format));
-	format.dwSize = sizeof(format);
-	format.dwFlags = DSBCAPS_GETCURRENTPOSITION2;
+    /* Try to create the secondary buffer */
+    SDL_memset (&format, 0, sizeof (format));
+    format.dwSize = sizeof (format);
+    format.dwFlags = DSBCAPS_GETCURRENTPOSITION2;
 #ifdef USE_POSITION_NOTIFY
-	format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY;
+    format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY;
 #endif
-	if ( ! focus ) {
-		format.dwFlags |= DSBCAPS_GLOBALFOCUS;
-	} else {
-		format.dwFlags |= DSBCAPS_STICKYFOCUS;
-	}
-	format.dwBufferBytes = numchunks*chunksize;
-	if ( (format.dwBufferBytes < DSBSIZE_MIN) ||
-	     (format.dwBufferBytes > DSBSIZE_MAX) ) {
-		SDL_SetError("Sound buffer size must be between %d and %d",
-				DSBSIZE_MIN/numchunks, DSBSIZE_MAX/numchunks);
-		return(-1);
-	}
-	format.dwReserved = 0;
-	format.lpwfxFormat = wavefmt;
-	result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
-	if ( result != DS_OK ) {
-		SetDSerror("DirectSound CreateSoundBuffer", result);
-		return(-1);
-	}
-	IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt);
+    if (!focus) {
+        format.dwFlags |= DSBCAPS_GLOBALFOCUS;
+    } else {
+        format.dwFlags |= DSBCAPS_STICKYFOCUS;
+    }
+    format.dwBufferBytes = numchunks * chunksize;
+    if ((format.dwBufferBytes < DSBSIZE_MIN) ||
+        (format.dwBufferBytes > DSBSIZE_MAX)) {
+        SDL_SetError ("Sound buffer size must be between %d and %d",
+                      DSBSIZE_MIN / numchunks, DSBSIZE_MAX / numchunks);
+        return (-1);
+    }
+    format.dwReserved = 0;
+    format.lpwfxFormat = wavefmt;
+    result = IDirectSound_CreateSoundBuffer (sndObj, &format, sndbuf, NULL);
+    if (result != DS_OK) {
+        SetDSerror ("DirectSound CreateSoundBuffer", result);
+        return (-1);
+    }
+    IDirectSoundBuffer_SetFormat (*sndbuf, wavefmt);
 
-	/* Silence the initial audio buffer */
-	result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes,
-	                                 (LPVOID *)&pvAudioPtr1, &dwAudioBytes1,
-	                                 (LPVOID *)&pvAudioPtr2, &dwAudioBytes2,
-	                                 DSBLOCK_ENTIREBUFFER);
-	if ( result == DS_OK ) {
-		if ( wavefmt->wBitsPerSample == 8 ) {
-			SDL_memset(pvAudioPtr1, 0x80, dwAudioBytes1);
-		} else {
-			SDL_memset(pvAudioPtr1, 0x00, dwAudioBytes1);
-		}
-		IDirectSoundBuffer_Unlock(*sndbuf,
-		                          (LPVOID)pvAudioPtr1, dwAudioBytes1,
-		                          (LPVOID)pvAudioPtr2, dwAudioBytes2);
-	}
+    /* Silence the initial audio buffer */
+    result = IDirectSoundBuffer_Lock (*sndbuf, 0, format.dwBufferBytes,
+                                      (LPVOID *) & pvAudioPtr1,
+                                      &dwAudioBytes1,
+                                      (LPVOID *) & pvAudioPtr2,
+                                      &dwAudioBytes2, DSBLOCK_ENTIREBUFFER);
+    if (result == DS_OK) {
+        if (wavefmt->wBitsPerSample == 8) {
+            SDL_memset (pvAudioPtr1, 0x80, dwAudioBytes1);
+        } else {
+            SDL_memset (pvAudioPtr1, 0x00, dwAudioBytes1);
+        }
+        IDirectSoundBuffer_Unlock (*sndbuf,
+                                   (LPVOID) pvAudioPtr1, dwAudioBytes1,
+                                   (LPVOID) pvAudioPtr2, dwAudioBytes2);
+    }
 
-	/* We're ready to go */
-	return(numchunks);
+    /* We're ready to go */
+    return (numchunks);
 }
 
 /* This function tries to set position notify events on the mixing buffer */
 #ifdef USE_POSITION_NOTIFY
-static int CreateAudioEvent(_THIS)
+static int
+CreateAudioEvent (_THIS)
 {
-	LPDIRECTSOUNDNOTIFY notify;
-	DSBPOSITIONNOTIFY *notify_positions;
-	int i, retval;
-	HRESULT result;
+    LPDIRECTSOUNDNOTIFY notify;
+    DSBPOSITIONNOTIFY *notify_positions;
+    int i, retval;
+    HRESULT result;
 
-	/* Default to fail on exit */
-	retval = -1;
-	notify = NULL;
+    /* Default to fail on exit */
+    retval = -1;
+    notify = NULL;
 
-	/* Query for the interface */
-	result = IDirectSoundBuffer_QueryInterface(mixbuf,
-			&IID_IDirectSoundNotify, (void *)&notify);
-	if ( result != DS_OK ) {
-		goto done;
-	}
+    /* Query for the interface */
+    result = IDirectSoundBuffer_QueryInterface (mixbuf,
+                                                &IID_IDirectSoundNotify,
+                                                (void *) &notify);
+    if (result != DS_OK) {
+        goto done;
+    }
 
-	/* Allocate the notify structures */
-	notify_positions = (DSBPOSITIONNOTIFY *)SDL_malloc(NUM_BUFFERS*
-					sizeof(*notify_positions));
-	if ( notify_positions == NULL ) {
-		goto done;
-	}
+    /* Allocate the notify structures */
+    notify_positions = (DSBPOSITIONNOTIFY *) SDL_malloc (NUM_BUFFERS *
+                                                         sizeof
+                                                         (*notify_positions));
+    if (notify_positions == NULL) {
+        goto done;
+    }
 
-	/* Create the notify event */
-	audio_event = CreateEvent(NULL, FALSE, FALSE, NULL);
-	if ( audio_event == NULL ) {
-		goto done;
-	}
+    /* Create the notify event */
+    audio_event = CreateEvent (NULL, FALSE, FALSE, NULL);
+    if (audio_event == NULL) {
+        goto done;
+    }
 
-	/* Set up the notify structures */
-	for ( i=0; i<NUM_BUFFERS; ++i ) {
-		notify_positions[i].dwOffset = i*mixlen;
-		notify_positions[i].hEventNotify = audio_event;
-	}
-	result = IDirectSoundNotify_SetNotificationPositions(notify,
-					NUM_BUFFERS, notify_positions);
-	if ( result == DS_OK ) {
-		retval = 0;
-	}
-done:
-	if ( notify != NULL ) {
-		IDirectSoundNotify_Release(notify);
-	}
-	return(retval);
+    /* Set up the notify structures */
+    for (i = 0; i < NUM_BUFFERS; ++i) {
+        notify_positions[i].dwOffset = i * mixlen;
+        notify_positions[i].hEventNotify = audio_event;
+    }
+    result = IDirectSoundNotify_SetNotificationPositions (notify,
+                                                          NUM_BUFFERS,
+                                                          notify_positions);
+    if (result == DS_OK) {
+        retval = 0;
+    }
+  done:
+    if (notify != NULL) {
+        IDirectSoundNotify_Release (notify);
+    }
+    return (retval);
 }
 #endif /* USE_POSITION_NOTIFY */
 
-static int DX5_OpenAudio(_THIS, SDL_AudioSpec *spec)
+static int
+DX5_OpenAudio (_THIS, SDL_AudioSpec * spec)
 {
-	HRESULT      result;
-	WAVEFORMATEX waveformat;
+    HRESULT result;
+    WAVEFORMATEX waveformat;
 
-	/* Set basic WAVE format parameters */
-	SDL_memset(&waveformat, 0, sizeof(waveformat));
-	waveformat.wFormatTag = WAVE_FORMAT_PCM;
+    /* Set basic WAVE format parameters */
+    SDL_memset (&waveformat, 0, sizeof (waveformat));
+    waveformat.wFormatTag = WAVE_FORMAT_PCM;
 
-	/* Determine the audio parameters from the AudioSpec */
-	switch ( spec->format & 0xFF ) {
-		case 8:
-			/* Unsigned 8 bit audio data */
-			spec->format = AUDIO_U8;
-			silence = 0x80;
-			waveformat.wBitsPerSample = 8;
-			break;
-		case 16:
-			/* Signed 16 bit audio data */
-			spec->format = AUDIO_S16;
-			silence = 0x00;
-			waveformat.wBitsPerSample = 16;
-			break;
-		default:
-			SDL_SetError("Unsupported audio format");
-			return(-1);
-	}
-	waveformat.nChannels = spec->channels;
-	waveformat.nSamplesPerSec = spec->freq;
-	waveformat.nBlockAlign =
-		waveformat.nChannels * (waveformat.wBitsPerSample/8);
-	waveformat.nAvgBytesPerSec = 
-		waveformat.nSamplesPerSec * waveformat.nBlockAlign;
+    /* Determine the audio parameters from the AudioSpec */
+    switch (spec->format & 0xFF) {
+    case 8:
+        /* Unsigned 8 bit audio data */
+        spec->format = AUDIO_U8;
+        silence = 0x80;
+        waveformat.wBitsPerSample = 8;
+        break;
+    case 16:
+        /* Signed 16 bit audio data */
+        spec->format = AUDIO_S16;
+        silence = 0x00;
+        waveformat.wBitsPerSample = 16;
+        break;
+    default:
+        SDL_SetError ("Unsupported audio format");
+        return (-1);
+    }
+    waveformat.nChannels = spec->channels;
+    waveformat.nSamplesPerSec = spec->freq;
+    waveformat.nBlockAlign =
+        waveformat.nChannels * (waveformat.wBitsPerSample / 8);
+    waveformat.nAvgBytesPerSec =
+        waveformat.nSamplesPerSec * waveformat.nBlockAlign;
 
-	/* Update the fragment size as size in bytes */
-	SDL_CalculateAudioSpec(spec);
+    /* Update the fragment size as size in bytes */
+    SDL_CalculateAudioSpec (spec);
 
-	/* Open the audio device */
-	result = DSoundCreate(NULL, &sound, NULL);
-	if ( result != DS_OK ) {
-		SetDSerror("DirectSoundCreate", result);
-		return(-1);
-	}
+    /* Open the audio device */
+    result = DSoundCreate (NULL, &sound, NULL);
+    if (result != DS_OK) {
+        SetDSerror ("DirectSoundCreate", result);
+        return (-1);
+    }
 
-	/* Create the audio buffer to which we write */
-	NUM_BUFFERS = -1;
+    /* Create the audio buffer to which we write */
+    NUM_BUFFERS = -1;
 #ifdef USE_PRIMARY_BUFFER
-	if ( mainwin ) {
-		NUM_BUFFERS = CreatePrimary(sound, mainwin, &mixbuf,
-						&waveformat, spec->size);
-	}
+    if (mainwin) {
+        NUM_BUFFERS = CreatePrimary (sound, mainwin, &mixbuf,
+                                     &waveformat, spec->size);
+    }
 #endif /* USE_PRIMARY_BUFFER */
-	if ( NUM_BUFFERS < 0 ) {
-		NUM_BUFFERS = CreateSecondary(sound, mainwin, &mixbuf,
-						&waveformat, spec->size);
-		if ( NUM_BUFFERS < 0 ) {
-			return(-1);
-		}
+    if (NUM_BUFFERS < 0) {
+        NUM_BUFFERS = CreateSecondary (sound, mainwin, &mixbuf,
+                                       &waveformat, spec->size);
+        if (NUM_BUFFERS < 0) {
+            return (-1);
+        }
 #ifdef DEBUG_SOUND
-		fprintf(stderr, "Using secondary audio buffer\n");
+        fprintf (stderr, "Using secondary audio buffer\n");
 #endif
-	}
+    }
 #ifdef DEBUG_SOUND
-	else
-		fprintf(stderr, "Using primary audio buffer\n");
+    else
+        fprintf (stderr, "Using primary audio buffer\n");
 #endif
 
-	/* The buffer will auto-start playing in DX5_WaitAudio() */
-	playing = 0;
-	mixlen = spec->size;
+    /* The buffer will auto-start playing in DX5_WaitAudio() */
+    playing = 0;
+    mixlen = spec->size;
 
 #ifdef USE_POSITION_NOTIFY
-	/* See if we can use DirectX 6 event notification */
-	if ( CreateAudioEvent(this) == 0 ) {
-		this->WaitAudio = DX6_WaitAudio_EventWait;
-	} else {
-		this->WaitAudio = DX5_WaitAudio_BusyWait;
-	}
+    /* See if we can use DirectX 6 event notification */
+    if (CreateAudioEvent (this) == 0) {
+        this->WaitAudio = DX6_WaitAudio_EventWait;
+    } else {
+        this->WaitAudio = DX5_WaitAudio_BusyWait;
+    }
 #endif
-	return(0);
+    return (0);
 }
 
+/* vi: set ts=4 sw=4 expandtab: */