Mercurial > sdl-ios-xcode
view src/main/macos/exports/SDL.x @ 4216:5b99971a27b4 SDL-1.2
Fixed bug #698
Hans de Goede 2009-02-13 01:10:52 PST
Since the new "glitch free" version of pulseaudio (used in Fedora 10 amongst
others), the sound of SDL using apps (like a simple playmus call) has been
crackling.
While looking in to fixing this I noticed that the current pulseaudio code in
SDL uses pa_simple. However pa_simple uses a thread to pump pulseaudio events
and ipc, given that SDL already has its own thread for audio handling this is
clearly suboptimal, leading to unnecessary context switching IPC, etc. Also
pa_simple does not allow one to implement the WaitAudio() callback for SDL
audiodrivers properly.
Given that my work is mostly a rewrite (although some original pieces remain)
I'm attaching the new .c and .h file, as that is easier to review then the huge
diff.
Let me know if you also want the diff.
This new version has the following features:
-no longer use an additional thread next to the SDL sound thread
-do not crackle with glitch free audio
-when used with a newer pulse, which does glitch free audio, the total latency
is
the same as with the alsa driver
-proper WaitAudio() implementation, saving another mixlen worth of latency
-adds a WaitDone() implementation
This patch has been written in consultancy with Lennart Poetering (the
pulseaudio author) and has been reviewed by him for correct use of the pa API.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 21 Sep 2009 09:27:08 +0000 |
| parents | 84cecd0b64b4 |
| children | 0a53c90a37f9 1e191391e68d |
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SDL_Init SDL_InitSubSystem SDL_QuitSubSystem SDL_WasInit SDL_Quit SDL_GetAppState SDL_AudioInit SDL_AudioQuit SDL_AudioDriverName SDL_OpenAudio SDL_GetAudioStatus SDL_PauseAudio SDL_LoadWAV_RW SDL_FreeWAV SDL_BuildAudioCVT SDL_ConvertAudio SDL_MixAudio SDL_LockAudio SDL_UnlockAudio SDL_CloseAudio SDL_CDNumDrives SDL_CDName SDL_CDOpen SDL_CDStatus SDL_CDPlayTracks SDL_CDPlay SDL_CDPause SDL_CDResume SDL_CDStop SDL_CDEject SDL_CDClose SDL_HasRDTSC SDL_HasMMX SDL_HasMMXExt SDL_Has3DNow SDL_Has3DNowExt SDL_HasSSE SDL_HasSSE2 SDL_HasAltiVec SDL_SetError SDL_GetError SDL_ClearError SDL_Error SDL_PumpEvents SDL_PeepEvents SDL_PollEvent SDL_WaitEvent SDL_PushEvent SDL_SetEventFilter SDL_GetEventFilter SDL_EventState SDL_NumJoysticks SDL_JoystickName SDL_JoystickOpen SDL_JoystickOpened SDL_JoystickIndex SDL_JoystickNumAxes SDL_JoystickNumBalls SDL_JoystickNumHats SDL_JoystickNumButtons SDL_JoystickUpdate SDL_JoystickEventState SDL_JoystickGetAxis SDL_JoystickGetHat SDL_JoystickGetBall SDL_JoystickGetButton SDL_JoystickClose SDL_EnableUNICODE SDL_EnableKeyRepeat SDL_GetKeyRepeat SDL_GetKeyState SDL_GetModState SDL_SetModState SDL_GetKeyName SDL_LoadObject SDL_LoadFunction SDL_UnloadObject SDL_GetMouseState SDL_GetRelativeMouseState SDL_WarpMouse SDL_CreateCursor SDL_SetCursor SDL_GetCursor SDL_FreeCursor SDL_ShowCursor SDL_CreateMutex SDL_mutexP SDL_mutexV SDL_DestroyMutex SDL_CreateSemaphore SDL_DestroySemaphore SDL_SemWait SDL_SemTryWait SDL_SemWaitTimeout SDL_SemPost SDL_SemValue SDL_CreateCond SDL_DestroyCond SDL_CondSignal SDL_CondBroadcast SDL_CondWait SDL_CondWaitTimeout SDL_RWFromFile SDL_RWFromFP SDL_RWFromMem SDL_RWFromConstMem SDL_AllocRW SDL_FreeRW SDL_ReadLE16 SDL_ReadBE16 SDL_ReadLE32 SDL_ReadBE32 SDL_ReadLE64 SDL_ReadBE64 SDL_WriteLE16 SDL_WriteBE16 SDL_WriteLE32 SDL_WriteBE32 SDL_WriteLE64 SDL_WriteBE64 SDL_GetWMInfo SDL_CreateThread SDL_CreateThread SDL_ThreadID SDL_GetThreadID SDL_WaitThread SDL_KillThread SDL_GetTicks SDL_Delay SDL_SetTimer SDL_AddTimer SDL_RemoveTimer SDL_Linked_Version SDL_VideoInit SDL_VideoQuit SDL_VideoDriverName SDL_GetVideoSurface SDL_GetVideoInfo SDL_VideoModeOK SDL_ListModes SDL_SetVideoMode SDL_UpdateRects SDL_UpdateRect SDL_Flip SDL_SetGamma SDL_SetGammaRamp SDL_GetGammaRamp SDL_SetColors SDL_SetPalette SDL_MapRGB SDL_MapRGBA SDL_GetRGB SDL_GetRGBA SDL_CreateRGBSurface SDL_CreateRGBSurfaceFrom SDL_FreeSurface SDL_LockSurface SDL_UnlockSurface SDL_LoadBMP_RW SDL_SaveBMP_RW SDL_SetColorKey SDL_SetAlpha SDL_SetClipRect SDL_GetClipRect SDL_ConvertSurface SDL_UpperBlit SDL_LowerBlit SDL_FillRect SDL_DisplayFormat SDL_DisplayFormatAlpha SDL_CreateYUVOverlay SDL_LockYUVOverlay SDL_UnlockYUVOverlay SDL_DisplayYUVOverlay SDL_FreeYUVOverlay SDL_GL_LoadLibrary SDL_GL_GetProcAddress SDL_GL_SetAttribute SDL_GL_GetAttribute SDL_GL_SwapBuffers SDL_GL_UpdateRects SDL_GL_Lock SDL_GL_Unlock SDL_WM_SetCaption SDL_WM_GetCaption SDL_WM_SetIcon SDL_WM_IconifyWindow SDL_WM_ToggleFullScreen SDL_WM_GrabInput SDL_SoftStretch SDL_putenv SDL_getenv SDL_qsort SDL_revcpy SDL_strlcpy SDL_strlcat SDL_strdup SDL_strrev SDL_strupr SDL_strlwr SDL_ltoa SDL_ultoa SDL_strcasecmp SDL_strncasecmp SDL_snprintf SDL_vsnprintf SDL_iconv SDL_iconv_string SDL_InitQuickDraw