Mercurial > sdl-ios-xcode
view docs/man3/SDL_AudioSpec.3 @ 1438:1f4f09641645
Date: Sun, 26 Feb 2006 11:25:09 +0900
From: Hayashi Naoyuki
Subject: Re: [SDL] CVS stable again, please update SDL ports
Some problems are caused on Tru64 UNIX.
If applying SDL12-osf1.path, these problems are fixed.
1. configure-script say "recursive mutexes... no" and "pthread
semaphores... no".
checking for pthreads... yes
checking for recursive mutexes... no
checking for pthread semaphores... no
This is because it compiled without pthread_cflags and pthread_lib when
checking recursive mutexes and pthread semaphores.
2. Compiling src/audio/mme/SDL_mmeaudio.c fails.
cc: Severe: ./src/audio/mme/SDL_mmeaudio.c, line 25: Cannot find file
<mme_api.h> specified in #include directive. (noinclfilef)
#include <mme_api.h>
-^
This is because BUILD_CFLAGS is wrong.
3. Compiling src/cdrom/osf/SDL_syscdrom.c fails.
cc: Warning: ./src/cdrom/osf/SDL_syscdrom.c, line 176: Too few actual
parameters in the invocation of the macro "SDL_stack_alloc". (toofewactuals)
cdpath = SDL_stack_alloc(len);
------------------------------------^
cc: Error: ./src/cdrom/osf/SDL_syscdrom.c, line 176: Invalid expression.
(badexpr)
cdpath = SDL_stack_alloc(len);
-----------------^
SDL_stack_alloc is defined in include/SDL_stdinc.h.
#define SDL_stack_alloc(type, count) (type*)alloca(sizeof(type)*count)
4. Linking fails if running configure with --enable-x11-shared=yes.
/usr/ccs/bin/ld:
Warning: Unresolved:
p_XData32
5. Compiling src/video/x11/SDL_x11dyn.c fails if running configure with
--enable-x11-shared=no.
cc: Error: ./src/video/x11/SDL_x11sym.h, line 149: In this statement,
"_SmtBufferOverflow" is not declared. (undeclared)
SDL_X11_SYM(1,void,_SmtBufferOverflow,(Display *dpy,register smtDisplayPtr))
^
cc: Error: ./src/video/x11/SDL_x11sym.h, line 150: In this statement,
"_SmtBufferOverflow" is not declared. (undeclared)
SDL_X11_SYM(1,void,_SmtBufferOverflow,(Display *dpy,register smtDisplayPtr))
^
cc: Error: ./src/video/x11/SDL_x11sym.h, line 150: In this statement,
"_SmtIpError" is not declared. (undeclared)
SDL_X11_SYM(1,void,_SmtIpError,(Display *dpy,register smtDisplayPtr, int))
^
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 26 Feb 2006 04:54:01 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
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.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