Mercurial > sdl-ios-xcode
view include/SDL_types.h @ 765:4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
nanosleep because nanosleep may not be portable to all systems
using SDL with the ALSA backend. This may be a moot point with
the switch to blocking writes anyway...
Date: Sat, 27 Dec 2003 21:47:36 +0100
From: Michel Daenzer
To: Debian Bug Tracking System
Subject: [SDL] Bug#225252: [PATCH] ALSA fixes
Package: libsdl1.2debian-all
Version: 1.2.6-2
Severity: normal
Tags: patch
For SDL 1.2.6, the ALSA backend was changed to call snd_pcm_open() with
SND_PCM_NONBLOCK. That's a good idea per se, however, it causes high CPU
usage, interrupted sound and stuttering in some games here. Taking a nanosleep
whenever snd_pcm_writei() returns -EAGAIN fixes this, but I think it's more
efficient to use blocking mode for the actual sound playback. Feedback from the
SDL and ALSA lists appreciated.
The patch also fixes the default ALSA device to be used.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 04 Jan 2004 15:40:50 +0000 |
parents | 04028d47b1ea |
children | b8d311d90021 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif /* General data types used by the SDL library */ #ifndef _SDL_types_h #define _SDL_types_h /* The number of elements in a table */ #define SDL_TABLESIZE(table) (sizeof(table)/sizeof(table[0])) /* Basic data types */ typedef enum { SDL_FALSE = 0, SDL_TRUE = 1 } SDL_bool; typedef unsigned char Uint8; typedef signed char Sint8; typedef unsigned short Uint16; typedef signed short Sint16; typedef unsigned int Uint32; typedef signed int Sint32; /* Figure out how to support 64-bit datatypes */ #if !defined(__STRICT_ANSI__) #if defined(__GNUC__) || defined(__MWERKS__) || defined(__SUNPRO_C) || defined(__DECC) #define SDL_HAS_64BIT_TYPE long long #elif defined(_MSC_VER) /* VC++ */ #define SDL_HAS_64BIT_TYPE __int64 #endif #endif /* !__STRICT_ANSI__ */ /* The 64-bit type isn't available on EPOC/Symbian OS */ #ifdef __SYMBIAN32__ #undef SDL_HAS_64BIT_TYPE #endif /* The 64-bit datatype isn't supported on all platforms */ #ifdef SDL_HAS_64BIT_TYPE #ifndef H_MMBASIC typedef unsigned SDL_HAS_64BIT_TYPE Uint64; #endif typedef SDL_HAS_64BIT_TYPE Sint64; #else /* This is really just a hack to prevent the compiler from complaining */ typedef struct { Uint32 hi; Uint32 lo; } Uint64, Sint64; #endif /* Make sure the types really have the right sizes */ #define SDL_COMPILE_TIME_ASSERT(name, x) \ typedef int SDL_dummy_ ## name[(x) * 2 - 1] SDL_COMPILE_TIME_ASSERT(uint8, sizeof(Uint8) == 1); SDL_COMPILE_TIME_ASSERT(sint8, sizeof(Sint8) == 1); SDL_COMPILE_TIME_ASSERT(uint16, sizeof(Uint16) == 2); SDL_COMPILE_TIME_ASSERT(sint16, sizeof(Sint16) == 2); SDL_COMPILE_TIME_ASSERT(uint32, sizeof(Uint32) == 4); SDL_COMPILE_TIME_ASSERT(sint32, sizeof(Sint32) == 4); SDL_COMPILE_TIME_ASSERT(uint64, sizeof(Uint64) == 8); SDL_COMPILE_TIME_ASSERT(sint64, sizeof(Sint64) == 8); /* Check to make sure enums are the size of ints, for structure packing. For both Watcom C/C++ and Borland C/C++ the compiler option that makes enums having the size of an int must be enabled. This is "-b" for Borland C/C++ and "-ei" for Watcom C/C++ (v11). */ /* Enable enums always int in CodeWarrior (for MPW use "-enum int") */ #ifdef __MWERKS__ #pragma enumsalwaysint on #endif typedef enum { DUMMY_ENUM_VALUE } SDL_DUMMY_ENUM; SDL_COMPILE_TIME_ASSERT(enum, sizeof(SDL_DUMMY_ENUM) == sizeof(int)); #undef SDL_COMPILE_TIME_ASSERT /* General keyboard/mouse state definitions */ enum { SDL_PRESSED = 0x01, SDL_RELEASED = 0x00 }; #endif