Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_JoystickOpen.3 @ 2042:3908e1f808e1
Fixed bug #292
I might be on crack here.
It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and
right channels of a stereo stream together, and clamps the new mono channel if
it would overflow.
Shouldn't it be dividing by 2 to average the two sample points instead of
clamping? Otherwise the mono sample point's volume doubles in the conversion.
This would also make the conversion faster, as it replaces two branches per
sample frame with a bitwise shift.
--ryan.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 24 Sep 2006 15:56:36 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
| rev | line source |
|---|---|
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
1 .TH "SDL_JoystickOpen" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
| 3 SDL_JoystickOpen\- Opens a joystick for use\&. | |
| 4 .SH "SYNOPSIS" | |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBSDL_Joystick *\fBSDL_JoystickOpen\fP\fR(\fBint index\fR); | |
| 9 .SH "DESCRIPTION" | |
| 10 .PP | |
| 11 Opens a joystick for use within SDL\&. The \fBindex\fR refers to the N\&'th joystick in the system\&. A joystick must be opened before it game be used\&. | |
| 12 .SH "RETURN VALUE" | |
| 13 .PP | |
| 14 Returns a \fBSDL_Joystick\fR structure on success\&. \fBNULL\fR on failure\&. | |
| 15 .SH "EXAMPLES" | |
| 16 .PP | |
| 17 .PP | |
| 18 .nf | |
| 19 \f(CWSDL_Joystick *joy; | |
| 20 // Check for joystick | |
| 21 if(SDL_NumJoysticks()>0){ | |
| 22 // Open joystick | |
| 23 joy=SDL_JoystickOpen(0); | |
| 24 | |
| 25 if(joy) | |
| 26 { | |
| 27 printf("Opened Joystick 0 | |
| 28 "); | |
| 29 printf("Name: %s | |
| 30 ", SDL_JoystickName(0)); | |
|
181
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Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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31 printf("Number of Axes: %d |
| 0 | 32 ", SDL_JoystickNumAxes(joy)); |
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181
e5bc29de3f0a
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Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
33 printf("Number of Buttons: %d |
| 0 | 34 ", SDL_JoystickNumButtons(joy)); |
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181
e5bc29de3f0a
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Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
35 printf("Number of Balls: %d |
| 0 | 36 ", SDL_JoystickNumBalls(joy)); |
| 37 } | |
| 38 else | |
| 39 printf("Couldn\&'t open Joystick 0 | |
| 40 "); | |
| 41 | |
| 42 // Close if opened | |
| 43 if(SDL_JoystickOpened(0)) | |
| 44 SDL_JoystickClose(joy); | |
| 45 }\fR | |
| 46 .fi | |
| 47 .PP | |
| 48 .SH "SEE ALSO" | |
| 49 .PP | |
| 50 \fI\fBSDL_JoystickClose\fP\fR | |
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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51 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00 |