Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_AudioSpec.3 @ 4234:9cb722ce769c SDL-1.2
Added some extra headers
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 23 Sep 2009 05:16:54 +0000 |
parents | 4e3b250c950e |
children | 1238da4a7112 |
rev | line source |
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Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
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1 .TH "SDL_AudioSpec" "3" "Tue 11 Sep 2001, 22:58" "SDL" "SDL API Reference" |
0 | 2 .SH "NAME" |
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4e3b250c950e
Erik Heckers fixed bug #493
Sam Lantinga <slouken@libsdl.org>
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3 SDL_AudioSpec \- Audio Specification Structure |
0 | 4 .SH "STRUCTURE DEFINITION" |
5 .PP | |
6 .nf | |
7 \f(CWtypedef struct{ | |
8 int freq; | |
9 Uint16 format; | |
10 Uint8 channels; | |
11 Uint8 silence; | |
12 Uint16 samples; | |
13 Uint32 size; | |
14 void (*callback)(void *userdata, Uint8 *stream, int len); | |
15 void *userdata; | |
16 } SDL_AudioSpec;\fR | |
17 .fi | |
18 .PP | |
19 .SH "STRUCTURE DATA" | |
20 .TP 20 | |
21 \fBfreq\fR | |
22 Audio frequency in samples per second | |
23 .TP 20 | |
24 \fBformat\fR | |
25 Audio data format | |
26 .TP 20 | |
27 \fBchannels\fR | |
28 Number of channels: 1 mono, 2 stereo | |
29 .TP 20 | |
30 \fBsilence\fR | |
31 Audio buffer silence value (calculated) | |
32 .TP 20 | |
33 \fBsamples\fR | |
34 Audio buffer size in samples | |
35 .TP 20 | |
36 \fBsize\fR | |
37 Audio buffer size in bytes (calculated) | |
38 .TP 20 | |
39 \fBcallback(\&.\&.)\fR | |
40 Callback function for filling the audio buffer | |
41 .TP 20 | |
42 \fBuserdata\fR | |
43 Pointer the user data which is passed to the callback function | |
44 .SH "DESCRIPTION" | |
45 .PP | |
46 The \fBSDL_AudioSpec\fR structure is used to describe the format of some audio data\&. This structure is used by \fI\fBSDL_OpenAudio\fP\fR and \fI\fBSDL_LoadWAV\fP\fR\&. While all fields are used by \fBSDL_OpenAudio\fP only \fBfreq\fR, \fBformat\fR, \fBsamples\fR and \fBchannels\fR are used by \fBSDL_LoadWAV\fP\&. We will detail these common members here\&. | |
47 .TP 20 | |
48 \fBfreq\fR | |
49 The number of samples sent to the sound device every second\&. Common values are 11025, 22050 and 44100\&. The higher the better\&. | |
50 .TP 20 | |
51 \fBformat\fR | |
52 Specifies the size and type of each sample element | |
53 .IP "\fBAUDIO_U8\fP" 10Unsigned 8-bit samples | |
54 .IP "\fBAUDIO_S8\fP" 10Signed 8-bit samples | |
55 .IP "\fBAUDIO_U16\fP or \fBAUDIO_U16LSB\fP" 10Unsigned 16-bit little-endian samples | |
56 .IP "\fBAUDIO_S16\fP or \fBAUDIO_S16LSB\fP" 10Signed 16-bit little-endian samples | |
57 .IP "\fBAUDIO_U16MSB\fP" 10Unsigned 16-bit big-endian samples | |
58 .IP "\fBAUDIO_S16MSB\fP" 10Signed 16-bit big-endian samples | |
59 .IP "\fBAUDIO_U16SYS\fP" 10Either \fBAUDIO_U16LSB\fP or \fBAUDIO_U16MSB\fP depending on you systems endianness | |
60 .IP "\fBAUDIO_S16SYS\fP" 10Either \fBAUDIO_S16LSB\fP or \fBAUDIO_S16MSB\fP depending on you systems endianness | |
61 .TP 20 | |
62 \fBchannels\fR | |
63 The number of seperate sound channels\&. 1 is mono (single channel), 2 is stereo (dual channel)\&. | |
64 .TP 20 | |
65 \fBsamples\fR | |
66 When used with \fI\fBSDL_OpenAudio\fP\fR this refers to the size of the audio buffer in samples\&. A sample a chunk of audio data of the size specified in \fBformat\fR mulitplied by the number of channels\&. When the \fBSDL_AudioSpec\fR is used with \fI\fBSDL_LoadWAV\fP\fR \fBsamples\fR is set to 4096\&. | |
67 .SH "SEE ALSO" | |
68 .PP | |
69 \fI\fBSDL_OpenAudio\fP\fR, \fI\fBSDL_LoadWAV\fP\fR | |
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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70 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:58 |