Mercurial > sdl-ios-xcode
annotate test/loopwave.c @ 1257:448a9a64537b
[PATCH] SDL_GetVideoMode() does not find best mode, part 2
Following commit 1.51, I come accross a problem when SDL must choose between
several video modes that could suit the one asked.
If I ask 320x240 with this list:
768x480 768x240 640x400 640x200 384x480 384x240 320x400 320x200
The smallest selectables modes are 384x240 and 320x400. And SDL choose the later
in this list, but 384x240 is more suitable. So I added a check to compare
the pixel count (surface) of modes, and select the one which has the smallest
pixel count.
In my example, 384x240 has 92160 pixels, and 320x400 has 128000 pixels. So now
SDL will choose 384x240 for the asked 320x240 mode.
| author | Patrice Mandin <patmandin@gmail.com> |
|---|---|
| date | Thu, 19 Jan 2006 21:28:52 +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
|
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
|
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 } |