1 .TH "SDL_AudioSpec" "3" "Tue 11 Sep 2001, 22:58" "SDL" "SDL API Reference"
3 SDL_AudioSpec\- Audio Specification Structure
4 .SH "STRUCTURE DEFINITION"
14 void (*callback)(void *userdata, Uint8 *stream, int len);
22 Audio frequency in samples per second
28 Number of channels: 1 mono, 2 stereo
31 Audio buffer silence value (calculated)
34 Audio buffer size in samples
37 Audio buffer size in bytes (calculated)
39 \fBcallback(\&.\&.)\fR
40 Callback function for filling the audio buffer
43 Pointer the user data which is passed to the callback function
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\&.
49 The number of samples sent to the sound device every second\&. Common values are 11025, 22050 and 44100\&. The higher the better\&.
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
63 The number of seperate sound channels\&. 1 is mono (single channel), 2 is stereo (dual channel)\&.
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\&.
69 \fI\fBSDL_OpenAudio\fP\fR, \fI\fBSDL_LoadWAV\fP\fR
70 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:58