diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/windx5/SDL_dx5audio.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/audio/windx5/SDL_dx5audio.c | 705 |
1 files changed, 0 insertions, 705 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/windx5/SDL_dx5audio.c b/distrib/sdl-1.2.12/src/audio/windx5/SDL_dx5audio.c deleted file mode 100644 index 26bd2e8..0000000 --- a/distrib/sdl-1.2.12/src/audio/windx5/SDL_dx5audio.c +++ /dev/null @@ -1,705 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2006 Sam Lantinga - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, write to the Free Software - Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - Sam Lantinga - slouken@libsdl.org -*/ -#include "SDL_config.h" - -/* Allow access to a raw mixing buffer */ - -#include "SDL_timer.h" -#include "SDL_audio.h" -#include "../SDL_audio_c.h" -#include "SDL_dx5audio.h" - -/* Define this if you want to use DirectX 6 DirectSoundNotify interface */ -//#define USE_POSITION_NOTIFY - -/* DirectX function pointers for audio */ -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); -#ifdef USE_POSITION_NOTIFY -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); - -/* Audio driver bootstrap functions */ - -static int Audio_Available(void) -{ - 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; - - } - /* Clean up.. */ - FreeLibrary(DSoundDLL); - } - return(dsound_ok); -} - -/* Functions for loading the DirectX functions dynamically */ -static HINSTANCE DSoundDLL = NULL; - -static void DX5_Unload(void) -{ - if ( DSoundDLL != NULL ) { - FreeLibrary(DSoundDLL); - DSoundCreate = NULL; - DSoundDLL = NULL; - } -} -static int DX5_Load(void) -{ - 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; -} - -static void Audio_DeleteDevice(SDL_AudioDevice *device) -{ - DX5_Unload(); - SDL_free(device->hidden); - SDL_free(device); -} - -static SDL_AudioDevice *Audio_CreateDevice(int devindex) -{ - SDL_AudioDevice *this; - - /* 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)); - - /* 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; - - return this; -} - -AudioBootStrap DSOUND_bootstrap = { - "dsound", "Win95/98/2000 DirectSound", - Audio_Available, Audio_CreateDevice -}; - -static void SetDSerror(const char *function, int code) -{ - 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; -} - -/* DirectSound needs to be associated with a window */ -static HWND mainwin = NULL; -/* */ -void DX5_SoundFocus(HWND hwnd) -{ - mainwin = hwnd; -} - -static void DX5_ThreadInit(_THIS) -{ - SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST); -} - -static void DX5_WaitAudio_BusyWait(_THIS) -{ - 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); - } -#ifdef DEBUG_SOUND - SetDSerror("DirectSound GetCurrentPosition", result); -#endif - return; - } - - 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; - } -#ifdef DEBUG_SOUND - SetDSerror("DirectSound Play", result); -#endif - 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) -{ - 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 ) { -#ifdef DEBUG_SOUND - SetDSerror("DirectSound Play", result); -#endif - return; - } - } - WaitForSingleObject(audio_event, INFINITE); -} -#endif /* USE_POSITION_NOTIFY */ - -static void DX5_PlayAudio(_THIS) -{ - /* Unlock the buffer, allowing it to play */ - if ( locked_buf ) { - IDirectSoundBuffer_Unlock(mixbuf, locked_buf, mixlen, NULL, 0); - } - -} - -static Uint8 *DX5_GetAudioBuf(_THIS) -{ - 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; -#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))); - } - } -#endif - 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); -} - -static void DX5_WaitDone(_THIS) -{ - 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); - - /* Stop the looping sound buffer */ - IDirectSoundBuffer_Stop(mixbuf); -} - -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; - } -} - -#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) -{ - 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 ) { -#ifdef DEBUG_SOUND - SetDSerror("DirectSound SetCooperativeLevel", result); -#endif - 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; -#ifdef USE_POSITION_NOTIFY - format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY; -#endif - result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL); - if ( result != DS_OK ) { -#ifdef DEBUG_SOUND - SetDSerror("DirectSound CreateSoundBuffer", result); -#endif - 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 ) { -#ifdef DEBUG_SOUND - 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); - - /* Set the primary audio format */ - result = IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt); - if ( result != DS_OK ) { -#ifdef DEBUG_SOUND - SetDSerror("DirectSound SetFormat", result); -#endif - 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) -{ - 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 ) { -#ifdef DEBUG_SOUND - SetDSerror("DirectSound SetCooperativeLevel", result); -#endif - return(-1); - } - - /* 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; -#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); - - /* 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); -} - -/* This function tries to set position notify events on the mixing buffer */ -#ifdef USE_POSITION_NOTIFY -static int CreateAudioEvent(_THIS) -{ - LPDIRECTSOUNDNOTIFY notify; - DSBPOSITIONNOTIFY *notify_positions; - int i, retval; - HRESULT result; - - /* 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; - } - - /* 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; - } - - /* 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) -{ - HRESULT result; - WAVEFORMATEX waveformat; - - /* 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; - - /* 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); - } - - /* 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); - } -#endif /* USE_PRIMARY_BUFFER */ - 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"); -#endif - } -#ifdef DEBUG_SOUND - else - fprintf(stderr, "Using primary audio buffer\n"); -#endif - - /* 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; - } -#endif - return(0); -} - |