| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../../SDL_internal.h" |
| |
| #if SDL_AUDIO_DRIVER_DSOUND |
| |
| /* Allow access to a raw mixing buffer */ |
| |
| #include "SDL_timer.h" |
| #include "SDL_loadso.h" |
| #include "SDL_audio.h" |
| #include "../SDL_audio_c.h" |
| #include "SDL_directsound.h" |
| |
| #ifndef WAVE_FORMAT_IEEE_FLOAT |
| #define WAVE_FORMAT_IEEE_FLOAT 0x0003 |
| #endif |
| |
| /* DirectX function pointers for audio */ |
| static void* DSoundDLL = NULL; |
| typedef HRESULT(WINAPI*fnDirectSoundCreate8)(LPGUID,LPDIRECTSOUND*,LPUNKNOWN); |
| typedef HRESULT(WINAPI*fnDirectSoundEnumerateW)(LPDSENUMCALLBACKW, LPVOID); |
| typedef HRESULT(WINAPI*fnDirectSoundCaptureEnumerateW)(LPDSENUMCALLBACKW,LPVOID); |
| static fnDirectSoundCreate8 pDirectSoundCreate8 = NULL; |
| static fnDirectSoundEnumerateW pDirectSoundEnumerateW = NULL; |
| static fnDirectSoundCaptureEnumerateW pDirectSoundCaptureEnumerateW = NULL; |
| |
| static void |
| DSOUND_Unload(void) |
| { |
| pDirectSoundCreate8 = NULL; |
| pDirectSoundEnumerateW = NULL; |
| pDirectSoundCaptureEnumerateW = NULL; |
| |
| if (DSoundDLL != NULL) { |
| SDL_UnloadObject(DSoundDLL); |
| DSoundDLL = NULL; |
| } |
| } |
| |
| |
| static int |
| DSOUND_Load(void) |
| { |
| int loaded = 0; |
| |
| DSOUND_Unload(); |
| |
| DSoundDLL = SDL_LoadObject("DSOUND.DLL"); |
| if (DSoundDLL == NULL) { |
| SDL_SetError("DirectSound: failed to load DSOUND.DLL"); |
| } else { |
| /* Now make sure we have DirectX 8 or better... */ |
| #define DSOUNDLOAD(f) { \ |
| p##f = (fn##f) SDL_LoadFunction(DSoundDLL, #f); \ |
| if (!p##f) loaded = 0; \ |
| } |
| loaded = 1; /* will reset if necessary. */ |
| DSOUNDLOAD(DirectSoundCreate8); |
| DSOUNDLOAD(DirectSoundEnumerateW); |
| DSOUNDLOAD(DirectSoundCaptureEnumerateW); |
| #undef DSOUNDLOAD |
| |
| if (!loaded) { |
| SDL_SetError("DirectSound: System doesn't appear to have DX8."); |
| } |
| } |
| |
| if (!loaded) { |
| DSOUND_Unload(); |
| } |
| |
| return loaded; |
| } |
| |
| static int |
| 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 -- Is DirectX 8.0 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); |
| } |
| return SDL_SetError("%s", errbuf); |
| } |
| |
| static void |
| DSOUND_FreeDeviceHandle(void *handle) |
| { |
| SDL_free(handle); |
| } |
| |
| static BOOL CALLBACK |
| FindAllDevs(LPGUID guid, LPCWSTR desc, LPCWSTR module, LPVOID data) |
| { |
| const int iscapture = (int) ((size_t) data); |
| if (guid != NULL) { /* skip default device */ |
| char *str = WIN_StringToUTF8(desc); |
| if (str != NULL) { |
| LPGUID cpyguid = (LPGUID) SDL_malloc(sizeof (GUID)); |
| SDL_memcpy(cpyguid, guid, sizeof (GUID)); |
| SDL_AddAudioDevice(iscapture, str, cpyguid); |
| SDL_free(str); /* addfn() makes a copy of this string. */ |
| } |
| } |
| return TRUE; /* keep enumerating. */ |
| } |
| |
| static void |
| DSOUND_DetectDevices(void) |
| { |
| pDirectSoundCaptureEnumerateW(FindAllDevs, (void *) ((size_t) 1)); |
| pDirectSoundEnumerateW(FindAllDevs, (void *) ((size_t) 0)); |
| } |
| |
| |
| static void |
| DSOUND_WaitDevice(_THIS) |
| { |
| DWORD status = 0; |
| DWORD cursor = 0; |
| DWORD junk = 0; |
| HRESULT result = DS_OK; |
| |
| /* 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(this->hidden->mixbuf, |
| &junk, &cursor); |
| if (result != DS_OK) { |
| if (result == DSERR_BUFFERLOST) { |
| IDirectSoundBuffer_Restore(this->hidden->mixbuf); |
| } |
| #ifdef DEBUG_SOUND |
| SetDSerror("DirectSound GetCurrentPosition", result); |
| #endif |
| return; |
| } |
| |
| while ((cursor / this->hidden->mixlen) == this->hidden->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(this->hidden->mixbuf, &status); |
| if ((status & DSBSTATUS_BUFFERLOST)) { |
| IDirectSoundBuffer_Restore(this->hidden->mixbuf); |
| IDirectSoundBuffer_GetStatus(this->hidden->mixbuf, &status); |
| if ((status & DSBSTATUS_BUFFERLOST)) { |
| break; |
| } |
| } |
| if (!(status & DSBSTATUS_PLAYING)) { |
| result = IDirectSoundBuffer_Play(this->hidden->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(this->hidden->mixbuf, |
| &junk, &cursor); |
| if (result != DS_OK) { |
| SetDSerror("DirectSound GetCurrentPosition", result); |
| return; |
| } |
| } |
| } |
| |
| static void |
| DSOUND_PlayDevice(_THIS) |
| { |
| /* Unlock the buffer, allowing it to play */ |
| if (this->hidden->locked_buf) { |
| IDirectSoundBuffer_Unlock(this->hidden->mixbuf, |
| this->hidden->locked_buf, |
| this->hidden->mixlen, NULL, 0); |
| } |
| |
| } |
| |
| static Uint8 * |
| DSOUND_GetDeviceBuf(_THIS) |
| { |
| DWORD cursor = 0; |
| DWORD junk = 0; |
| HRESULT result = DS_OK; |
| DWORD rawlen = 0; |
| |
| /* Figure out which blocks to fill next */ |
| this->hidden->locked_buf = NULL; |
| result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf, |
| &junk, &cursor); |
| if (result == DSERR_BUFFERLOST) { |
| IDirectSoundBuffer_Restore(this->hidden->mixbuf); |
| result = IDirectSoundBuffer_GetCurrentPosition(this->hidden->mixbuf, |
| &junk, &cursor); |
| } |
| if (result != DS_OK) { |
| SetDSerror("DirectSound GetCurrentPosition", result); |
| return (NULL); |
| } |
| cursor /= this->hidden->mixlen; |
| #ifdef DEBUG_SOUND |
| /* Detect audio dropouts */ |
| { |
| DWORD spot = cursor; |
| if (spot < this->hidden->lastchunk) { |
| spot += this->hidden->num_buffers; |
| } |
| if (spot > this->hidden->lastchunk + 1) { |
| fprintf(stderr, "Audio dropout, missed %d fragments\n", |
| (spot - (this->hidden->lastchunk + 1))); |
| } |
| } |
| #endif |
| this->hidden->lastchunk = cursor; |
| cursor = (cursor + 1) % this->hidden->num_buffers; |
| cursor *= this->hidden->mixlen; |
| |
| /* Lock the audio buffer */ |
| result = IDirectSoundBuffer_Lock(this->hidden->mixbuf, cursor, |
| this->hidden->mixlen, |
| (LPVOID *) & this->hidden->locked_buf, |
| &rawlen, NULL, &junk, 0); |
| if (result == DSERR_BUFFERLOST) { |
| IDirectSoundBuffer_Restore(this->hidden->mixbuf); |
| result = IDirectSoundBuffer_Lock(this->hidden->mixbuf, cursor, |
| this->hidden->mixlen, |
| (LPVOID *) & this-> |
| hidden->locked_buf, &rawlen, NULL, |
| &junk, 0); |
| } |
| if (result != DS_OK) { |
| SetDSerror("DirectSound Lock", result); |
| return (NULL); |
| } |
| return (this->hidden->locked_buf); |
| } |
| |
| static void |
| DSOUND_WaitDone(_THIS) |
| { |
| Uint8 *stream = DSOUND_GetDeviceBuf(this); |
| |
| /* Wait for the playing chunk to finish */ |
| if (stream != NULL) { |
| SDL_memset(stream, this->spec.silence, this->hidden->mixlen); |
| DSOUND_PlayDevice(this); |
| } |
| DSOUND_WaitDevice(this); |
| |
| /* Stop the looping sound buffer */ |
| IDirectSoundBuffer_Stop(this->hidden->mixbuf); |
| } |
| |
| static void |
| DSOUND_CloseDevice(_THIS) |
| { |
| if (this->hidden != NULL) { |
| if (this->hidden->sound != NULL) { |
| if (this->hidden->mixbuf != NULL) { |
| /* Clean up the audio buffer */ |
| IDirectSoundBuffer_Release(this->hidden->mixbuf); |
| this->hidden->mixbuf = NULL; |
| } |
| IDirectSound_Release(this->hidden->sound); |
| this->hidden->sound = NULL; |
| } |
| |
| SDL_free(this->hidden); |
| this->hidden = NULL; |
| } |
| } |
| |
| /* This function tries to create a secondary audio buffer, and returns the |
| number of audio chunks available in the created buffer. |
| */ |
| static int |
| CreateSecondary(_THIS, HWND focus) |
| { |
| LPDIRECTSOUND sndObj = this->hidden->sound; |
| LPDIRECTSOUNDBUFFER *sndbuf = &this->hidden->mixbuf; |
| Uint32 chunksize = this->spec.size; |
| const int numchunks = 8; |
| HRESULT result = DS_OK; |
| DSBUFFERDESC format; |
| LPVOID pvAudioPtr1, pvAudioPtr2; |
| DWORD dwAudioBytes1, dwAudioBytes2; |
| WAVEFORMATEX wfmt; |
| |
| SDL_zero(wfmt); |
| |
| if (SDL_AUDIO_ISFLOAT(this->spec.format)) { |
| wfmt.wFormatTag = WAVE_FORMAT_IEEE_FLOAT; |
| } else { |
| wfmt.wFormatTag = WAVE_FORMAT_PCM; |
| } |
| |
| wfmt.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format); |
| wfmt.nChannels = this->spec.channels; |
| wfmt.nSamplesPerSec = this->spec.freq; |
| wfmt.nBlockAlign = wfmt.nChannels * (wfmt.wBitsPerSample / 8); |
| wfmt.nAvgBytesPerSec = wfmt.nSamplesPerSec * wfmt.nBlockAlign; |
| |
| /* Update the fragment size as size in bytes */ |
| SDL_CalculateAudioSpec(&this->spec); |
| |
| /* 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) { |
| return SetDSerror("DirectSound SetCooperativeLevel", result); |
| } |
| |
| /* Try to create the secondary buffer */ |
| SDL_zero(format); |
| format.dwSize = sizeof(format); |
| format.dwFlags = DSBCAPS_GETCURRENTPOSITION2; |
| if (!focus) { |
| format.dwFlags |= DSBCAPS_GLOBALFOCUS; |
| } else { |
| format.dwFlags |= DSBCAPS_STICKYFOCUS; |
| } |
| format.dwBufferBytes = numchunks * chunksize; |
| if ((format.dwBufferBytes < DSBSIZE_MIN) || |
| (format.dwBufferBytes > DSBSIZE_MAX)) { |
| return SDL_SetError("Sound buffer size must be between %d and %d", |
| DSBSIZE_MIN / numchunks, DSBSIZE_MAX / numchunks); |
| } |
| format.dwReserved = 0; |
| format.lpwfxFormat = &wfmt; |
| result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL); |
| if (result != DS_OK) { |
| return SetDSerror("DirectSound CreateSoundBuffer", result); |
| } |
| IDirectSoundBuffer_SetFormat(*sndbuf, &wfmt); |
| |
| /* Silence the initial audio buffer */ |
| result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes, |
| (LPVOID *) & pvAudioPtr1, &dwAudioBytes1, |
| (LPVOID *) & pvAudioPtr2, &dwAudioBytes2, |
| DSBLOCK_ENTIREBUFFER); |
| if (result == DS_OK) { |
| SDL_memset(pvAudioPtr1, this->spec.silence, dwAudioBytes1); |
| IDirectSoundBuffer_Unlock(*sndbuf, |
| (LPVOID) pvAudioPtr1, dwAudioBytes1, |
| (LPVOID) pvAudioPtr2, dwAudioBytes2); |
| } |
| |
| /* We're ready to go */ |
| return (numchunks); |
| } |
| |
| static int |
| DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) |
| { |
| HRESULT result; |
| SDL_bool valid_format = SDL_FALSE; |
| SDL_bool tried_format = SDL_FALSE; |
| SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format); |
| LPGUID guid = (LPGUID) handle; |
| |
| /* Initialize all variables that we clean on shutdown */ |
| this->hidden = (struct SDL_PrivateAudioData *) |
| SDL_malloc((sizeof *this->hidden)); |
| if (this->hidden == NULL) { |
| return SDL_OutOfMemory(); |
| } |
| SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| |
| /* Open the audio device */ |
| result = pDirectSoundCreate8(guid, &this->hidden->sound, NULL); |
| if (result != DS_OK) { |
| DSOUND_CloseDevice(this); |
| return SetDSerror("DirectSoundCreate", result); |
| } |
| |
| while ((!valid_format) && (test_format)) { |
| switch (test_format) { |
| case AUDIO_U8: |
| case AUDIO_S16: |
| case AUDIO_S32: |
| case AUDIO_F32: |
| tried_format = SDL_TRUE; |
| this->spec.format = test_format; |
| this->hidden->num_buffers = CreateSecondary(this, NULL); |
| if (this->hidden->num_buffers > 0) { |
| valid_format = SDL_TRUE; |
| } |
| break; |
| } |
| test_format = SDL_NextAudioFormat(); |
| } |
| |
| if (!valid_format) { |
| DSOUND_CloseDevice(this); |
| if (tried_format) { |
| return -1; /* CreateSecondary() should have called SDL_SetError(). */ |
| } |
| return SDL_SetError("DirectSound: Unsupported audio format"); |
| } |
| |
| /* The buffer will auto-start playing in DSOUND_WaitDevice() */ |
| this->hidden->mixlen = this->spec.size; |
| |
| return 0; /* good to go. */ |
| } |
| |
| |
| static void |
| DSOUND_Deinitialize(void) |
| { |
| DSOUND_Unload(); |
| } |
| |
| |
| static int |
| DSOUND_Init(SDL_AudioDriverImpl * impl) |
| { |
| if (!DSOUND_Load()) { |
| return 0; |
| } |
| |
| /* Set the function pointers */ |
| impl->DetectDevices = DSOUND_DetectDevices; |
| impl->OpenDevice = DSOUND_OpenDevice; |
| impl->PlayDevice = DSOUND_PlayDevice; |
| impl->WaitDevice = DSOUND_WaitDevice; |
| impl->WaitDone = DSOUND_WaitDone; |
| impl->GetDeviceBuf = DSOUND_GetDeviceBuf; |
| impl->CloseDevice = DSOUND_CloseDevice; |
| impl->FreeDeviceHandle = DSOUND_FreeDeviceHandle; |
| |
| impl->Deinitialize = DSOUND_Deinitialize; |
| |
| return 1; /* this audio target is available. */ |
| } |
| |
| AudioBootStrap DSOUND_bootstrap = { |
| "directsound", "DirectSound", DSOUND_Init, 0 |
| }; |
| |
| #endif /* SDL_AUDIO_DRIVER_DSOUND */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
