Mercurial > sdl-ios-xcode
annotate include/SDL_version.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 | dfc1c102e825 |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
297
f6ffac90895c
Updated copyright information for 2002
Sam Lantinga <slouken@libsdl.org>
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
251
b8688cfdc232
Updated the headers with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* This header defines the current SDL version */ | |
| 29 | |
| 30 #ifndef _SDL_version_h | |
| 31 #define _SDL_version_h | |
| 32 | |
| 33 #include "SDL_types.h" | |
| 34 | |
| 35 #include "begin_code.h" | |
| 36 /* Set up for C function definitions, even when using C++ */ | |
| 37 #ifdef __cplusplus | |
| 38 extern "C" { | |
| 39 #endif | |
| 40 | |
| 41 /* Printable format: "%d.%d.%d", MAJOR, MINOR, PATCHLEVEL | |
| 42 */ | |
| 43 #define SDL_MAJOR_VERSION 1 | |
| 44 #define SDL_MINOR_VERSION 2 | |
| 714 | 45 #define SDL_PATCHLEVEL 7 |
| 0 | 46 |
| 47 typedef struct { | |
| 48 Uint8 major; | |
| 49 Uint8 minor; | |
| 50 Uint8 patch; | |
| 51 } SDL_version; | |
| 52 | |
| 53 /* This macro can be used to fill a version structure with the compile-time | |
| 54 * version of the SDL library. | |
| 55 */ | |
| 56 #define SDL_VERSION(X) \ | |
| 57 { \ | |
| 58 (X)->major = SDL_MAJOR_VERSION; \ | |
| 59 (X)->minor = SDL_MINOR_VERSION; \ | |
| 60 (X)->patch = SDL_PATCHLEVEL; \ | |
| 61 } | |
| 62 | |
| 63 /* This macro turns the version numbers into a numeric value: | |
| 64 (1,2,3) -> (1203) | |
| 65 This assumes that there will never be more than 100 patchlevels | |
| 66 */ | |
| 67 #define SDL_VERSIONNUM(X, Y, Z) \ | |
| 68 (X)*1000 + (Y)*100 + (Z) | |
| 69 | |
| 70 /* This is the version number macro for the current SDL version */ | |
| 71 #define SDL_COMPILEDVERSION \ | |
| 72 SDL_VERSIONNUM(SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL) | |
| 73 | |
| 74 /* This macro will evaluate to true if compiled with SDL at least X.Y.Z */ | |
| 75 #define SDL_VERSION_ATLEAST(X, Y, Z) \ | |
| 76 (SDL_COMPILEDVERSION >= SDL_VERSIONNUM(X, Y, Z)) | |
| 77 | |
| 78 /* This function gets the version of the dynamically linked SDL library. | |
| 79 it should NOT be used to fill a version structure, instead you should | |
| 80 use the SDL_Version() macro. | |
| 81 */ | |
|
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Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
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82 extern DECLSPEC const SDL_version * SDLCALL SDL_Linked_Version(void); |
| 0 | 83 |
| 84 /* Ends C function definitions when using C++ */ | |
| 85 #ifdef __cplusplus | |
| 86 } | |
| 87 #endif | |
| 88 #include "close_code.h" | |
| 89 | |
| 90 #endif /* _SDL_version_h */ |