Mercurial > sdl-ios-xcode
diff src/audio/windx5/SDL_dx5audio.c @ 1895:c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 10 Jul 2006 21:04:37 +0000 |
parents | 9b02a5b97f79 |
children | 4ad1e863d100 |
line wrap: on
line diff
--- a/src/audio/windx5/SDL_dx5audio.c Thu Jul 06 18:01:37 2006 +0000 +++ b/src/audio/windx5/SDL_dx5audio.c Mon Jul 10 21:04:37 2006 +0000 @@ -32,10 +32,10 @@ //#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 int DX5_OpenAudio(_THIS, SDL_AudioSpec * spec); static void DX5_ThreadInit(_THIS); static void DX5_WaitAudio_BusyWait(_THIS); #ifdef USE_POSITION_NOTIFY @@ -48,658 +48,686 @@ /* 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, &junk, &cursor); - 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, &junk, &cursor); + if (result != DS_OK) { + if (result == DSERR_BUFFERLOST) { + IDirectSoundBuffer_Restore(mixbuf); + } #ifdef DEBUG_SOUND - SetDSerror("DirectSound GetCurrentPosition", result); + SetDSerror("DirectSound GetCurrentPosition", result); #endif - return; - } + return; + } - while ( (cursor/mixlen) == lastchunk ) { - /* FIXME: find out how much time is left and sleep that long */ - SDL_Delay(1); + while ((cursor / mixlen) == lastchunk) { + /* FIXME: find out how much time is left and sleep that long */ + SDL_Delay(1); - /* 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, - &junk, &cursor); - if ( result != DS_OK ) { - SetDSerror("DirectSound GetCurrentPosition", result); - return; - } - } + /* Find out where we are playing */ + result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, + &junk, &cursor); + if (result != DS_OK) { + SetDSerror("DirectSound GetCurrentPosition", result); + return; + } + } } #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, &junk, &cursor); - if ( result == DSERR_BUFFERLOST ) { - IDirectSoundBuffer_Restore(mixbuf); - result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, - &junk, &cursor); - } - if ( result != DS_OK ) { - SetDSerror("DirectSound GetCurrentPosition", result); - return(NULL); - } - cursor /= mixlen; + /* Figure out which blocks to fill next */ + locked_buf = NULL; + result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &junk, &cursor); + if (result == DSERR_BUFFERLOST) { + IDirectSoundBuffer_Restore(mixbuf); + result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, + &junk, &cursor); + } + if (result != DS_OK) { + SetDSerror("DirectSound GetCurrentPosition", result); + return (NULL); + } + cursor /= mixlen; #ifdef DEBUG_SOUND - /* Detect audio dropouts */ - { DWORD spot = cursor; - if ( spot < lastchunk ) { - spot += NUM_BUFFERS; - } - if ( spot > lastchunk+1 ) { - fprintf(stderr, "Audio dropout, missed %d fragments\n", - (spot - (lastchunk+1))); - } - } + /* Detect audio dropouts */ + { + DWORD spot = cursor; + if (spot < lastchunk) { + spot += NUM_BUFFERS; + } + if (spot > lastchunk + 1) { + fprintf(stderr, "Audio dropout, missed %d fragments\n", + (spot - (lastchunk + 1))); + } + } #endif - lastchunk = cursor; - cursor = (cursor+1)%NUM_BUFFERS; - cursor *= mixlen; + lastchunk = 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 = 8; - HRESULT result; - DSBUFFERDESC format; - LPVOID pvAudioPtr1, pvAudioPtr2; - DWORD dwAudioBytes1, dwAudioBytes2; + const int numchunks = 8; + 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 *)¬ify); - if ( result != DS_OK ) { - goto done; - } + /* Query for the interface */ + result = IDirectSoundBuffer_QueryInterface(mixbuf, + &IID_IDirectSoundNotify, + (void *) ¬ify); + 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() */ - lastchunk = 0; - mixlen = spec->size; + /* The buffer will auto-start playing in DX5_WaitAudio() */ + lastchunk = 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: */