Mercurial > sdl-ios-xcode
annotate test/loopwave.c @ 1295:c3e36ac8a94c
Date: Sun, 6 Mar 2005 17:06:20 +0100
From: Per Inge Mathisen
Subject: [SDL] Fullscreen refresh on win32
Windows has a terrible default for fullscreen 3D apps of 60mhz refresh
rate. This can be fixed by the user by going into his driver's
control panel and forcing the refresh rate higher. However, this not a
very user friendly way about it, and in any case SDL contains no code
that could figure out this that condition has afflicted the user.
So the question is, could SDL fix this for the user? It is possible
under Windows to request a higher refresh rate. The danger is of
course that if the user has an old monitor, and you request a too high
refresh rate, the monitor could be damaged. However, I believe there
might be a way around that: Check before switching what refresh rate
the user's desktop runs in, and if our fullscreen dimensions are equal
or less than those of the desktop, use the higher refresh rate of 60
and the desktop rate.
Since most users run their desktops in the same or higher resolution
something sane, this should fix this problem for most users.
Thoughts?
An alternative is to add an SDL_GL_GetAttribute(SDL_GL_REFRESH_RATE)
option so that programs can bitch at their users at their own
convenience.
- Per
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 30 Jan 2006 06:56:10 +0000 |
| parents | be9c9c8f6d53 |
| children | 0394f8ebc42d |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* Program to load a wave file and loop playing it using SDL sound */ | |
| 3 | |
| 4 /* loopwaves.c is much more robust in handling WAVE files -- | |
| 5 This is only for simple WAVEs | |
| 6 */ | |
| 7 | |
| 8 #include <stdio.h> | |
| 9 #include <stdlib.h> | |
| 10 #include <signal.h> | |
| 11 | |
| 12 #include "SDL.h" | |
| 13 #include "SDL_audio.h" | |
| 14 | |
| 15 struct { | |
| 16 SDL_AudioSpec spec; | |
| 17 Uint8 *sound; /* Pointer to wave data */ | |
| 18 Uint32 soundlen; /* Length of wave data */ | |
| 19 int soundpos; /* Current play position */ | |
| 20 } wave; | |
| 21 | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
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22 |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
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23 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
24 static void quit(int rc) |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
25 { |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
26 SDL_Quit(); |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
27 exit(rc); |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
28 } |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
29 |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
30 |
| 0 | 31 void fillerup(void *unused, Uint8 *stream, int len) |
| 32 { | |
| 33 Uint8 *waveptr; | |
| 34 int waveleft; | |
| 35 | |
| 36 /* Set up the pointers */ | |
| 37 waveptr = wave.sound + wave.soundpos; | |
| 38 waveleft = wave.soundlen - wave.soundpos; | |
| 39 | |
| 40 /* Go! */ | |
| 41 while ( waveleft <= len ) { | |
| 42 SDL_MixAudio(stream, waveptr, waveleft, SDL_MIX_MAXVOLUME); | |
| 43 stream += waveleft; | |
| 44 len -= waveleft; | |
| 45 waveptr = wave.sound; | |
| 46 waveleft = wave.soundlen; | |
| 47 wave.soundpos = 0; | |
| 48 } | |
| 49 SDL_MixAudio(stream, waveptr, len, SDL_MIX_MAXVOLUME); | |
| 50 wave.soundpos += len; | |
| 51 } | |
| 52 | |
| 53 static int done = 0; | |
| 54 void poked(int sig) | |
| 55 { | |
| 56 done = 1; | |
| 57 } | |
| 58 | |
| 59 int main(int argc, char *argv[]) | |
| 60 { | |
| 61 char name[32]; | |
| 62 | |
| 63 /* Load the SDL library */ | |
| 64 if ( SDL_Init(SDL_INIT_AUDIO) < 0 ) { | |
| 65 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
66 return(1); |
| 0 | 67 } |
| 68 | |
| 69 if ( argv[1] == NULL ) { | |
| 70 fprintf(stderr, "Usage: %s <wavefile>\n", argv[0]); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
71 quit(1); |
| 0 | 72 } |
| 73 | |
| 74 /* Load the wave file into memory */ | |
| 75 if ( SDL_LoadWAV(argv[1], | |
| 76 &wave.spec, &wave.sound, &wave.soundlen) == NULL ) { | |
| 77 fprintf(stderr, "Couldn't load %s: %s\n", | |
| 78 argv[1], SDL_GetError()); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
79 quit(1); |
| 0 | 80 } |
| 81 wave.spec.callback = fillerup; | |
| 82 | |
| 83 /* Set the signals */ | |
| 84 #ifdef SIGHUP | |
| 85 signal(SIGHUP, poked); | |
| 86 #endif | |
| 87 signal(SIGINT, poked); | |
| 88 #ifdef SIGQUIT | |
| 89 signal(SIGQUIT, poked); | |
| 90 #endif | |
| 91 signal(SIGTERM, poked); | |
| 92 | |
| 93 /* Initialize fillerup() variables */ | |
| 94 if ( SDL_OpenAudio(&wave.spec, NULL) < 0 ) { | |
| 95 fprintf(stderr, "Couldn't open audio: %s\n", SDL_GetError()); | |
| 96 SDL_FreeWAV(wave.sound); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
97 quit(2); |
| 0 | 98 } |
| 99 SDL_PauseAudio(0); | |
| 100 | |
| 101 /* Let the audio run */ | |
| 102 printf("Using audio driver: %s\n", SDL_AudioDriverName(name, 32)); | |
| 103 while ( ! done && (SDL_GetAudioStatus() == SDL_AUDIO_PLAYING) ) | |
| 104 SDL_Delay(1000); | |
| 105 | |
| 106 /* Clean up on signal */ | |
| 107 SDL_CloseAudio(); | |
| 108 SDL_FreeWAV(wave.sound); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
109 SDL_Quit(); |
| 0 | 110 return(0); |
| 111 } |