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annotate src/video/nanox/SDL_nxwm.c @ 765:4c2ba6161939

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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 f6ffac90895c
children b8d311d90021
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4 Copyright (C) 2001 Hsieh-Fu Tsai
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5
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6 This library is free software; you can redistribute it and/or
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7 modify it under the terms of the GNU Library General Public
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8 License as published by the Free Software Foundation; either
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9 version 2 of the License, or (at your option) any later version.
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10
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11 This library is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 Library General Public License for more details.
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15
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16 You should have received a copy of the GNU Library General Public
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17 License along with this library; if not, write to the Free
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 Sam Lantinga
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21 slouken@libsdl.org
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22
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23 Hsieh-Fu Tsai
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24 clare@setabox.com
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25 */
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26
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27 #include <stdlib.h>
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28
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29 #include "SDL_syswm.h"
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30 #include "SDL_error.h"
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31 #include "SDL_events_c.h"
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32
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33 #include "SDL_nxwm_c.h"
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34
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35 void NX_SetCaption (_THIS, const char * title, const char * icon)
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36 {
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37 Dprintf ("enter NX_SetCaption\n") ;
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38
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39 // Lock the event thread, in multi-threading environments
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40 SDL_Lock_EventThread () ;
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41
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42 if (SDL_Window)
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43 GrSetWindowTitle (SDL_Window, title) ;
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44
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45 SDL_Unlock_EventThread () ;
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46 Dprintf ("leave NX_SetCaption\n") ;
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47 }
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48
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49 int NX_GetWMInfo (_THIS, SDL_SysWMinfo * info)
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50 {
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51 Dprintf ("enter NX_GetWMInfo\n") ;
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52
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53 if (info -> version.major <= SDL_MAJOR_VERSION) {
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54 info -> window = SDL_Window ;
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55 return 1 ;
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56 } else {
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57 SDL_SetError("Application not compiled with SDL %d.%d\n",
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58 SDL_MAJOR_VERSION, SDL_MINOR_VERSION) ;
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59 return -1 ;
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60 }
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61
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62 Dprintf ("leave NX_GetWMInfo\n") ;
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63 }