Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audiomem.c @ 641:df178851293b
Date: 28 Jun 2003 22:42:52 +0100
From: Alan Swanson
Subject: Re: [SDL] New XFree 4.3 Video Mode Patch
I have a wee amendment that moves the qsort in set_best_resolution
to only occur after failing to find an exact match only. This would
make absolutely sure we get a user set mode.
While I've never had any problems for my normal resolutions (1280x1024,
1024x768, 800x600 & 640,480) while closely examining the output from
qsort I've noticed it doesn't seem to sort the modes fully. These is
one definite wrong at 1152x768 and a few that just look wrong to me.
From a program (attached) I made to examine this more easily. X has
sorted its mode list using the same method as ours (plus frequency),
and our user modes get inserted without any other movement.
On the patch I've made I've also changed cmpmodes to sort on vertical
resolution and then horizontal. Ie vertical is now most significant
bit.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 28 Jun 2003 21:52:26 +0000 |
| parents | f6ffac90895c |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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f6ffac90895c
Updated copyright information for 2002
Sam Lantinga <slouken@libsdl.org>
parents:
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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 | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
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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 /* Functions to allocate audio buffer memory, shareable across threads | |
| 29 (necessary because SDL audio emulates threads with fork() | |
| 30 */ | |
| 31 | |
|
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cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
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|
32 #include <stdlib.h> |
| 0 | 33 #ifdef FORK_HACK |
| 34 #include <sys/types.h> | |
| 35 #include <sys/ipc.h> | |
| 36 #include <sys/shm.h> | |
| 37 #include <stddef.h> | |
| 38 #endif | |
| 39 | |
| 40 #include "SDL_audiomem.h" | |
| 41 | |
| 42 /* Allocate memory that will be shared between threads (freed on exit) */ | |
| 43 void *SDL_AllocAudioMem(int size) | |
| 44 { | |
| 45 void *chunk; | |
| 46 | |
| 47 #ifdef FORK_HACK | |
| 48 int semid; | |
| 49 | |
| 50 /* Create and get the address of a shared memory segment */ | |
| 51 semid = shmget(IPC_PRIVATE, size, (IPC_CREAT|0600)); | |
| 52 if ( semid < 0 ) { | |
| 53 return(NULL); | |
| 54 } | |
| 55 chunk = shmat(semid, NULL, 0); | |
| 56 | |
| 57 /* Set the segment for deletion when it is detatched */ | |
| 58 shmctl(semid, IPC_RMID, NULL); /* Delets semid if shmat() fails */ | |
| 59 #else | |
| 60 chunk = malloc(size); | |
| 61 #endif | |
| 62 return((void *)chunk); | |
| 63 } | |
| 64 | |
| 65 void SDL_FreeAudioMem(void *chunk) | |
| 66 { | |
| 67 #ifdef FORK_HACK | |
| 68 shmdt(chunk); | |
| 69 #else | |
| 70 free(chunk); | |
| 71 #endif | |
| 72 } |