Mercurial > sdl-ios-xcode
view include/SDL_config_macosx.h @ 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 | 4250beeb5ad1 |
| children |
line wrap: on
line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 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 */ #ifndef _SDL_config_macosx_h #define _SDL_config_macosx_h #include "SDL_platform.h" /* This gets us MAC_OS_X_VERSION_MIN_REQUIRED... */ #include <AvailabilityMacros.h> /* This is a set of defines to configure the SDL features */ #define SDL_HAS_64BIT_TYPE 1 /* Useful headers */ /* If we specified an SDK or have a post-PowerPC chip, then alloca.h exists. */ #if ( (MAC_OS_X_VERSION_MIN_REQUIRED >= 1030) || (!defined(__POWERPC__)) ) #define HAVE_ALLOCA_H 1 #endif #define HAVE_SYS_TYPES_H 1 #define HAVE_STDIO_H 1 #define STDC_HEADERS 1 #define HAVE_STRING_H 1 #define HAVE_INTTYPES_H 1 #define HAVE_STDINT_H 1 #define HAVE_CTYPE_H 1 #define HAVE_MATH_H 1 #define HAVE_SIGNAL_H 1 /* C library functions */ #define HAVE_MALLOC 1 #define HAVE_CALLOC 1 #define HAVE_REALLOC 1 #define HAVE_FREE 1 #define HAVE_ALLOCA 1 #define HAVE_GETENV 1 #define HAVE_PUTENV 1 #define HAVE_UNSETENV 1 #define HAVE_QSORT 1 #define HAVE_ABS 1 #define HAVE_BCOPY 1 #define HAVE_MEMSET 1 #define HAVE_MEMCPY 1 #define HAVE_MEMMOVE 1 #define HAVE_MEMCMP 1 #define HAVE_STRLEN 1 #define HAVE_STRLCPY 1 #define HAVE_STRLCAT 1 #define HAVE_STRDUP 1 #define HAVE_STRCHR 1 #define HAVE_STRRCHR 1 #define HAVE_STRSTR 1 #define HAVE_STRTOL 1 #define HAVE_STRTOUL 1 #define HAVE_STRTOLL 1 #define HAVE_STRTOULL 1 #define HAVE_STRTOD 1 #define HAVE_ATOI 1 #define HAVE_ATOF 1 #define HAVE_STRCMP 1 #define HAVE_STRNCMP 1 #define HAVE_STRCASECMP 1 #define HAVE_STRNCASECMP 1 #define HAVE_SSCANF 1 #define HAVE_SNPRINTF 1 #define HAVE_VSNPRINTF 1 #define HAVE_SIGACTION 1 #define HAVE_SETJMP 1 #define HAVE_NANOSLEEP 1 /* Enable various audio drivers */ #define SDL_AUDIO_DRIVER_COREAUDIO 1 #define SDL_AUDIO_DRIVER_DISK 1 #define SDL_AUDIO_DRIVER_DUMMY 1 /* Enable various cdrom drivers */ #define SDL_CDROM_MACOSX 1 /* Enable various input drivers */ #define SDL_JOYSTICK_IOKIT 1 /* Enable various shared object loading systems */ #ifdef __ppc__ /* For Mac OS X 10.2 compatibility */ #define SDL_LOADSO_DLCOMPAT 1 #else #define SDL_LOADSO_DLOPEN 1 #endif /* Enable various threading systems */ #define SDL_THREAD_PTHREAD 1 #define SDL_THREAD_PTHREAD_RECURSIVE_MUTEX 1 /* Enable various timer systems */ #define SDL_TIMER_UNIX 1 /* Enable various video drivers */ #define SDL_VIDEO_DRIVER_DUMMY 1 #if ((defined TARGET_API_MAC_CARBON) && (TARGET_API_MAC_CARBON)) #define SDL_VIDEO_DRIVER_TOOLBOX 1 #else #define SDL_VIDEO_DRIVER_QUARTZ 1 #endif #define SDL_VIDEO_DRIVER_DGA 1 #define SDL_VIDEO_DRIVER_X11 1 #define SDL_VIDEO_DRIVER_X11_DGAMOUSE 1 #define SDL_VIDEO_DRIVER_X11_DYNAMIC "/usr/X11R6/lib/libX11.6.dylib" #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT "/usr/X11R6/lib/libXext.6.dylib" #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR "/usr/X11R6/lib/libXrandr.2.dylib" #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER "/usr/X11R6/lib/libXrender.1.dylib" #define SDL_VIDEO_DRIVER_X11_VIDMODE 1 #define SDL_VIDEO_DRIVER_X11_XINERAMA 1 #define SDL_VIDEO_DRIVER_X11_XME 1 #define SDL_VIDEO_DRIVER_X11_XRANDR 1 #define SDL_VIDEO_DRIVER_X11_XV 1 /* Enable OpenGL support */ #define SDL_VIDEO_OPENGL 1 #define SDL_VIDEO_OPENGL_GLX 1 /* Disable screensaver */ #define SDL_VIDEO_DISABLE_SCREENSAVER 1 /* Enable assembly routines */ #define SDL_ASSEMBLY_ROUTINES 1 #ifdef __ppc__ #define SDL_ALTIVEC_BLITTERS 1 #endif #endif /* _SDL_config_macosx_h */