mirror of
https://github.com/dhewm/dhewm3-libs.git
synced 2024-11-24 13:01:11 +00:00
c3bc09dc60
./configure --host=i686-w64-mingw32 \ --prefix=$HOME/devel/games/doom3-libs/i686-w64-mingw32
70 lines
2.6 KiB
Groff
70 lines
2.6 KiB
Groff
.TH "SDL_AudioSpec" "3" "Tue 11 Sep 2001, 22:58" "SDL" "SDL API Reference"
|
|
.SH "NAME"
|
|
SDL_AudioSpec \- Audio Specification Structure
|
|
.SH "STRUCTURE DEFINITION"
|
|
.PP
|
|
.nf
|
|
\f(CWtypedef struct{
|
|
int freq;
|
|
Uint16 format;
|
|
Uint8 channels;
|
|
Uint8 silence;
|
|
Uint16 samples;
|
|
Uint32 size;
|
|
void (*callback)(void *userdata, Uint8 *stream, int len);
|
|
void *userdata;
|
|
} SDL_AudioSpec;\fR
|
|
.fi
|
|
.PP
|
|
.SH "STRUCTURE DATA"
|
|
.TP 20
|
|
\fBfreq\fR
|
|
Audio frequency in samples per second
|
|
.TP 20
|
|
\fBformat\fR
|
|
Audio data format
|
|
.TP 20
|
|
\fBchannels\fR
|
|
Number of channels: 1 mono, 2 stereo
|
|
.TP 20
|
|
\fBsilence\fR
|
|
Audio buffer silence value (calculated)
|
|
.TP 20
|
|
\fBsamples\fR
|
|
Audio buffer size in samples
|
|
.TP 20
|
|
\fBsize\fR
|
|
Audio buffer size in bytes (calculated)
|
|
.TP 20
|
|
\fBcallback(\&.\&.)\fR
|
|
Callback function for filling the audio buffer
|
|
.TP 20
|
|
\fBuserdata\fR
|
|
Pointer the user data which is passed to the callback function
|
|
.SH "DESCRIPTION"
|
|
.PP
|
|
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\&.
|
|
.TP 20
|
|
\fBfreq\fR
|
|
The number of samples sent to the sound device every second\&. Common values are 11025, 22050 and 44100\&. The higher the better\&.
|
|
.TP 20
|
|
\fBformat\fR
|
|
Specifies the size and type of each sample element
|
|
.IP "\fBAUDIO_U8\fP" 10Unsigned 8-bit samples
|
|
.IP "\fBAUDIO_S8\fP" 10Signed 8-bit samples
|
|
.IP "\fBAUDIO_U16\fP or \fBAUDIO_U16LSB\fP" 10Unsigned 16-bit little-endian samples
|
|
.IP "\fBAUDIO_S16\fP or \fBAUDIO_S16LSB\fP" 10Signed 16-bit little-endian samples
|
|
.IP "\fBAUDIO_U16MSB\fP" 10Unsigned 16-bit big-endian samples
|
|
.IP "\fBAUDIO_S16MSB\fP" 10Signed 16-bit big-endian samples
|
|
.IP "\fBAUDIO_U16SYS\fP" 10Either \fBAUDIO_U16LSB\fP or \fBAUDIO_U16MSB\fP depending on you systems endianness
|
|
.IP "\fBAUDIO_S16SYS\fP" 10Either \fBAUDIO_S16LSB\fP or \fBAUDIO_S16MSB\fP depending on you systems endianness
|
|
.TP 20
|
|
\fBchannels\fR
|
|
The number of seperate sound channels\&. 1 is mono (single channel), 2 is stereo (dual channel)\&.
|
|
.TP 20
|
|
\fBsamples\fR
|
|
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\&.
|
|
.SH "SEE ALSO"
|
|
.PP
|
|
\fI\fBSDL_OpenAudio\fP\fR, \fI\fBSDL_LoadWAV\fP\fR
|
|
.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:58
|