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Commit 66d3d818 authored by Ryan C. Gordon's avatar Ryan C. Gordon
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Implemented dummy audio driver. 

   Fixes Bugzilla #161.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401536
parent 2e50f15b
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Inline Side-by-side
Showing with 496 additions and 40 deletions
configure.in
View file @ 66d3d818
......@@ -533,6 +533,18 @@ AC_HELP_STRING([--enable-diskaudio], [support the disk writer audio driver [defa
fi
}
dnl rcg03142006 See if the user wants the dummy audio driver...
CheckDummyAudio()
{
AC_ARG_ENABLE(dummyaudio,
AC_HELP_STRING([--enable-dummyaudio], [support the dummy audio driver [default=yes]]),
, enable_dummyaudio=yes)
if test x$enable_audio = xyes -a x$enable_dummyaudio = xyes; then
AC_DEFINE(SDL_AUDIO_DRIVER_DUMMY)
SOURCES="$SOURCES $srcdir/src/audio/dummy/*.c"
fi
}
dnl Set up the Atari Audio driver
CheckAtariAudio()
{
......@@ -1915,6 +1927,7 @@ case "$target" in
esac
CheckDummyVideo
CheckDiskAudio
CheckDummyAudio
CheckDLOPEN
CheckNASM
CheckAltivec
......@@ -2029,6 +2042,7 @@ case "$target" in
ARCH=qnx
CheckDummyVideo
CheckDiskAudio
CheckDummyAudio
# CheckNASM
CheckDLOPEN
CheckNAS
......@@ -2069,6 +2083,7 @@ case "$target" in
fi
CheckDummyVideo
CheckDiskAudio
CheckDummyAudio
CheckWIN32
CheckWIN32GL
CheckDIRECTX
......@@ -2131,6 +2146,7 @@ case "$target" in
ac_default_prefix=/boot/develop/tools/gnupro
CheckDummyVideo
CheckDiskAudio
CheckDummyAudio
CheckNASM
CheckBWINDOW
CheckBeGL
......@@ -2183,6 +2199,7 @@ case "$target" in
ARCH=macosx
CheckDummyVideo
CheckDiskAudio
CheckDummyAudio
CheckDLOPEN
CheckCOCOA
CheckCARBON
......@@ -2249,6 +2266,7 @@ case "$target" in
ARCH=mint
CheckDummyVideo
CheckDiskAudio
CheckDummyAudio
CheckAtariBiosEvent
CheckAtariXbiosVideo
CheckAtariGemVideo
......
include/SDL_config.h
View file @ 66d3d818
/* include/SDL_config.h. Generated by configure. */
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
......@@ -23,56 +24,276 @@
#ifndef _SDL_config_h
#define _SDL_config_h
/* This is a set of defines to configure the SDL features */
/* General platform specific identifiers */
#include "SDL_platform.h"
/* Add any platform that doesn't build using the configure system */
#if defined(__AMIGA__)
#include "SDL_config_amiga.h"
#elif defined(__DREAMCAST__)
#include "SDL_config_dreamcast.h"
#elif defined(__MACOS__)
#include "SDL_config_macos.h"
#elif defined(__MACOSX__)
#include "SDL_config_macosx.h"
#elif defined(__WIN32__)
#include "SDL_config_win32.h"
#elif defined(__OS2__)
#include "SDL_config_os2.h"
#else
/* This is the minimal configuration that can be used to build SDL */
/* C language features */
/* #undef const */
/* #undef inline */
/* #undef volatile */
/* C datatypes */
/* #undef size_t */
/* #undef int8_t */
/* #undef uint8_t */
/* #undef int16_t */
/* #undef uint16_t */
/* #undef int32_t */
/* #undef uint32_t */
/* #undef int64_t */
/* #undef uint64_t */
/* #undef uintptr_t */
#define SDL_HAS_64BIT_TYPE 1
/* Endianness */
#define SDL_BYTEORDER 1234
/* Comment this if you want to build without any C library requirements */
#define HAVE_LIBC 1
#if HAVE_LIBC
/* Useful headers */
#define HAVE_ALLOCA_H 1
#define HAVE_SYS_TYPES_H 1
#define HAVE_STDIO_H 1
#define STDC_HEADERS 1
#define HAVE_STDLIB_H 1
#define HAVE_STDARG_H 1
#define HAVE_MALLOC_H 1
#define HAVE_MEMORY_H 1
#define HAVE_STRING_H 1
#define HAVE_STRINGS_H 1
#define HAVE_INTTYPES_H 1
#define HAVE_STDINT_H 1
#define HAVE_CTYPE_H 1
#define HAVE_MATH_H 1
#define HAVE_ICONV_H 1
#define HAVE_SIGNAL_H 1
/* #undef HAVE_ALTIVEC_H */
/* C library functions */
#define HAVE_MALLOC 1
#define HAVE_CALLOC 1
#define HAVE_REALLOC 1
#define HAVE_FREE 1
#define HAVE_ALLOCA 1
#ifndef _WIN32 /* Don't use C runtime versions of these on Windows */
#define HAVE_GETENV 1
#define HAVE_PUTENV 1
#define HAVE_UNSETENV 1
#endif
#define HAVE_QSORT 1
#define HAVE_ABS 1
#define HAVE_BCOPY 1
#define HAVE_MEMSET 1
#define HAVE_MEMCPY 1
#define HAVE_MEMMOVE 1
#define HAVE_MEMCMP 1
#define HAVE_STRLEN 1
/* #undef HAVE_STRLCPY */
/* #undef HAVE_STRLCAT */
#define HAVE_STRDUP 1
/* #undef HAVE__STRREV */
/* #undef HAVE__STRUPR */
/* #undef HAVE__STRLWR */
/* #undef HAVE_INDEX */
/* #undef HAVE_RINDEX */
#define HAVE_STRCHR 1
#define HAVE_STRRCHR 1
#define HAVE_STRSTR 1
/* #undef HAVE_ITOA */
/* #undef HAVE__LTOA */
/* #undef HAVE__UITOA */
/* #undef HAVE__ULTOA */
#define HAVE_STRTOL 1
#define HAVE_STRTOUL 1
/* #undef HAVE__I64TOA */
/* #undef HAVE__UI64TOA */
#define HAVE_STRTOLL 1
#define HAVE_STRTOULL 1
#define HAVE_STRTOD 1
#define HAVE_ATOI 1
#define HAVE_ATOF 1
#define HAVE_STRCMP 1
#define HAVE_STRNCMP 1
/* #undef HAVE__STRICMP */
#define HAVE_STRCASECMP 1
/* #undef HAVE__STRNICMP */
#define HAVE_STRNCASECMP 1
#define HAVE_SSCANF 1
#define HAVE_SNPRINTF 1
#define HAVE_VSNPRINTF 1
#define HAVE_ICONV 1
#define HAVE_SIGACTION 1
#define HAVE_SETJMP 1
#define HAVE_NANOSLEEP 1
/* #undef HAVE_CLOCK_GETTIME */
#define HAVE_DLVSYM 1
#else
/* We may need some replacement for stdarg.h here */
#include <stdarg.h>
#endif /* HAVE_LIBC */
typedef signed char int8_t;
typedef unsigned char uint8_t;
typedef signed short int16_t;
typedef unsigned short uint16_t;
typedef signed int int32_t;
typedef unsigned int uint32_t;
typedef unsigned int size_t;
typedef unsigned long uintptr_t;
/* Allow disabling of core subsystems */
/* #undef SDL_AUDIO_DISABLED */
/* #undef SDL_CDROM_DISABLED */
/* #undef SDL_CPUINFO_DISABLED */
/* #undef SDL_EVENTS_DISABLED */
/* #undef SDL_FILE_DISABLED */
/* #undef SDL_JOYSTICK_DISABLED */
/* #undef SDL_LOADSO_DISABLED */
/* #undef SDL_THREADS_DISABLED */
/* #undef SDL_TIMERS_DISABLED */
/* #undef SDL_VIDEO_DISABLED */
/* Enable the disk audio driver (src/audio/disk/\*.c) */
/* Enable various audio drivers */
/* #undef SDL_AUDIO_DRIVER_AHI */
#define SDL_AUDIO_DRIVER_ALSA 1
#define SDL_AUDIO_DRIVER_ALSA_DYNAMIC "libasound.so.2"
/* #undef SDL_AUDIO_DRIVER_ARTS */
/* #undef SDL_AUDIO_DRIVER_ARTS_DYNAMIC */
/* #undef SDL_AUDIO_DRIVER_BAUDIO */
/* #undef SDL_AUDIO_DRIVER_COREAUDIO */
/* #undef SDL_AUDIO_DRIVER_DART */
/* #undef SDL_AUDIO_DRIVER_DC */
#define SDL_AUDIO_DRIVER_DISK 1
#define SDL_AUDIO_DRIVER_DUMMY 1
/* #undef SDL_AUDIO_DRIVER_DMEDIA */
/* #undef SDL_AUDIO_DRIVER_DSOUND */
/* #undef SDL_AUDIO_DRIVER_ESD */
/* #undef SDL_AUDIO_DRIVER_ESD_DYNAMIC */
/* #undef SDL_AUDIO_DRIVER_MINT */
/* #undef SDL_AUDIO_DRIVER_MMEAUDIO */
/* #undef SDL_AUDIO_DRIVER_NAS */
/* #undef SDL_AUDIO_DRIVER_OPENBSD */
#define SDL_AUDIO_DRIVER_OSS 1
/* #undef SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H */
/* #undef SDL_AUDIO_DRIVER_PAUD */
/* #undef SDL_AUDIO_DRIVER_QNXNTO */
/* #undef SDL_AUDIO_DRIVER_SNDMGR */
/* #undef SDL_AUDIO_DRIVER_SUNAUDIO */
/* #undef SDL_AUDIO_DRIVER_WAVEOUT */
/* Enable the stub cdrom driver (src/cdrom/dummy/\*.c) */
#define SDL_CDROM_DISABLED 1
/* Enable various cdrom drivers */
/* #undef SDL_CDROM_AIX */
/* #undef SDL_CDROM_BEOS */
/* #undef SDL_CDROM_BSDI */
/* #undef SDL_CDROM_DC */
/* #undef SDL_CDROM_DUMMY */
/* #undef SDL_CDROM_FREEBSD */
#define SDL_CDROM_LINUX 1
/* #undef SDL_CDROM_MACOS */
/* #undef SDL_CDROM_MACOSX */
/* #undef SDL_CDROM_MINT */
/* #undef SDL_CDROM_OPENBSD */
/* #undef SDL_CDROM_OS2 */
/* #undef SDL_CDROM_OSF */
/* #undef SDL_CDROM_QNX */
/* #undef SDL_CDROM_WIN32 */
/* Enable the stub joystick driver (src/joystick/dummy/\*.c) */
#define SDL_JOYSTICK_DISABLED 1
/* Enable various input drivers */
/* #undef SDL_INPUT_TSLIB */
/* #undef SDL_JOYSTICK_AMIGA */
/* #undef SDL_JOYSTICK_BEOS */
/* #undef SDL_JOYSTICK_DC */
/* #undef SDL_JOYSTICK_DUMMY */
/* #undef SDL_JOYSTICK_IOKIT */
#define SDL_JOYSTICK_LINUX 1
/* #undef SDL_JOYSTICK_LINUXEV */
/* #undef SDL_JOYSTICK_MACOS */
/* #undef SDL_JOYSTICK_MINT */
/* #undef SDL_JOYSTICK_OS2 */
/* #undef SDL_JOYSTICK_RISCOS */
/* #undef SDL_JOYSTICK_WINMM */
/* #undef SDL_JOYSTICK_USBHID */
/* Enable the stub shared object loader (src/loadso/dummy/\*.c) */
#define SDL_LOADSO_DISABLED 1
/* Enable various shared object loading systems */
/* #undef SDL_LOADSO_BEOS */
/* #undef SDL_LOADSO_DLCOMPAT */
#define SDL_LOADSO_DLOPEN 1
/* #undef SDL_LOADSO_LDG */
/* #undef SDL_LOADSO_MACOS */
/* #undef SDL_LOADSO_OS2 */
/* #undef SDL_LOADSO_WIN32 */
/* Enable the stub thread support (src/thread/generic/\*.c) */
#define SDL_THREADS_DISABLED 1
/* Enable various threading systems */
/* #undef SDL_THREAD_AMIGA */
/* #undef SDL_THREAD_BEOS */
/* #undef SDL_THREAD_DC */
/* #undef SDL_THREAD_EPOC */
/* #undef SDL_THREAD_OS2 */
/* #undef SDL_THREAD_PTH */
#define SDL_THREAD_PTHREAD 1
#define SDL_THREAD_PTHREAD_RECURSIVE_MUTEX 1
/* #undef SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP */
/* #undef SDL_THREAD_SPROC */
/* #undef SDL_THREAD_WIN32 */
/* Enable the stub timer support (src/timer/dummy/\*.c) */
#define SDL_TIMERS_DISABLED 1
/* Enable various timer systems */
/* #undef SDL_TIMER_AMIGA */
/* #undef SDL_TIMER_BEOS */
/* #undef SDL_TIMER_DC */
/* #undef SDL_TIMER_EPOC */
/* #undef SDL_TIMER_MACOS */
/* #undef SDL_TIMER_MINT */
/* #undef SDL_TIMER_OS2 */
/* #undef SDL_TIMER_RISCOS */
#define SDL_TIMER_UNIX 1
/* #undef SDL_TIMER_WIN32 */
/* #undef SDL_TIMER_WINCE */
/* Enable the dummy video driver (src/video/dummy/\*.c) */
/* Enable various video drivers */
/* #undef SDL_VIDEO_DRIVER_AALIB */
/* #undef SDL_VIDEO_DRIVER_BWINDOW */
/* #undef SDL_VIDEO_DRIVER_CYBERGRAPHICS */
/* #undef SDL_VIDEO_DRIVER_DC */
/* #undef SDL_VIDEO_DRIVER_DDRAW */
#define SDL_VIDEO_DRIVER_DGA 1
/* #undef SDL_VIDEO_DRIVER_DIRECTFB */
/* #undef SDL_VIDEO_DRIVER_DRAWSPROCKET */
#define SDL_VIDEO_DRIVER_DUMMY 1
/* #undef SDL_VIDEO_DRIVER_EPOC */
#define SDL_VIDEO_DRIVER_FBCON 1
/* #undef SDL_VIDEO_DRIVER_GAPI */
/* #undef SDL_VIDEO_DRIVER_GEM */
/* #undef SDL_VIDEO_DRIVER_GGI */
/* #undef SDL_VIDEO_DRIVER_IPOD */
/* #undef SDL_VIDEO_DRIVER_NANOX */
/* #undef SDL_VIDEO_DRIVER_OS2FS */
/* #undef SDL_VIDEO_DRIVER_PHOTON */
/* #undef SDL_VIDEO_DRIVER_PICOGUI */
/* #undef SDL_VIDEO_DRIVER_PS2GS */
/* #undef SDL_VIDEO_DRIVER_QTOPIA */
/* #undef SDL_VIDEO_DRIVER_QUARTZ */
/* #undef SDL_VIDEO_DRIVER_RISCOS */
/* #undef SDL_VIDEO_DRIVER_SVGALIB */
/* #undef SDL_VIDEO_DRIVER_TOOLBOX */
/* #undef SDL_VIDEO_DRIVER_VGL */
/* #undef SDL_VIDEO_DRIVER_WINDIB */
/* #undef SDL_VIDEO_DRIVER_WSCONS */
#define SDL_VIDEO_DRIVER_X11 1
#define SDL_VIDEO_DRIVER_X11_DGAMOUSE 1
/* #undef SDL_VIDEO_DRIVER_X11_DYNAMIC */
/* #undef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT */
#define SDL_VIDEO_DRIVER_X11_VIDMODE 1
#define SDL_VIDEO_DRIVER_X11_XINERAMA 1
#define SDL_VIDEO_DRIVER_X11_XME 1
#define SDL_VIDEO_DRIVER_X11_XV 1
/* #undef SDL_VIDEO_DRIVER_XBIOS */
/* Enable OpenGL support */
#define SDL_VIDEO_OPENGL 1
#define SDL_VIDEO_OPENGL_GLX 1
/* #undef SDL_VIDEO_OPENGL_WGL */
/* #undef SDL_VIDEO_OPENGL_OSMESA */
/* #undef SDL_VIDEO_OPENGL_OSMESA_DYNAMIC */
#endif /* platform config */
/* Enable assembly routines */
#define SDL_ASSEMBLY_ROUTINES 1
/* #undef SDL_HERMES_BLITTERS */
/* #undef SDL_ALTIVEC_BLITTERS */
#endif /* _SDL_config_h */
include/SDL_config.h.in
View file @ 66d3d818
......@@ -159,6 +159,7 @@
#undef SDL_AUDIO_DRIVER_DART
#undef SDL_AUDIO_DRIVER_DC
#undef SDL_AUDIO_DRIVER_DISK
#undef SDL_AUDIO_DRIVER_DUMMY
#undef SDL_AUDIO_DRIVER_DMEDIA
#undef SDL_AUDIO_DRIVER_DSOUND
#undef SDL_AUDIO_DRIVER_ESD
......
include/SDL_config.h.minimal
View file @ 66d3d818
......@@ -52,8 +52,8 @@ typedef unsigned int uint32_t;
typedef unsigned int size_t;
typedef unsigned long uintptr_t;
/* Enable the disk audio driver (src/audio/disk/\*.c) */
#define SDL_AUDIO_DRIVER_DISK 1
/* Enable the dummy audio driver (src/audio/dummy/\*.c) */
#define SDL_AUDIO_DRIVER_DUMMY 1
/* Enable the stub cdrom driver (src/cdrom/dummy/\*.c) */
#define SDL_CDROM_DISABLED 1
......
include/SDL_config_amiga.h
View file @ 66d3d818
......@@ -50,6 +50,8 @@
/* Enable various audio drivers */
#define SDL_AUDIO_DRIVER_AHI 1
#define SDL_AUDIO_DRIVER_DUMMY 1
#define SDL_AUDIO_DRIVER_DISK 1
/* Enable various cdrom drivers */
#define SDL_CDROM_DUMMY 1
......
include/SDL_config_dreamcast.h
View file @ 66d3d818
......@@ -79,6 +79,7 @@ typedef unsigned long uintptr_t;
/* Enable various audio drivers */
#define SDL_AUDIO_DRIVER_DC 1
#define SDL_AUDIO_DRIVER_DUMMY 1
/* Enable various cdrom drivers */
#define SDL_CDROM_DC 1
......
include/SDL_config_macos.h
View file @ 66d3d818
......@@ -67,6 +67,8 @@ typedef unsigned int uintptr_t;
/* Enable various audio drivers */
#define SDL_AUDIO_DRIVER_SNDMGR 1
#define SDL_AUDIO_DRIVER_DISK 1
#define SDL_AUDIO_DRIVER_DUMMY 1
/* Enable various cdrom drivers */
#define SDL_CDROM_MACOS 1
......
include/SDL_config_macosx.h
View file @ 66d3d818
......@@ -83,6 +83,8 @@
/* Enable various audio drivers */
#define SDL_AUDIO_DRIVER_COREAUDIO 1
#define SDL_AUDIO_DRIVER_SNDMGR 1
#define SDL_AUDIO_DRIVER_DISK 1
#define SDL_AUDIO_DRIVER_DUMMY 1
/* Enable various cdrom drivers */
#define SDL_CDROM_MACOSX 1
......
include/SDL_config_os2.h
View file @ 66d3d818
......@@ -108,6 +108,8 @@ typedef unsigned long long uint64_t;
/* Enable various audio drivers */
#define SDL_AUDIO_DRIVER_DART 1
#define SDL_AUDIO_DRIVER_DISK 1
#define SDL_AUDIO_DRIVER_DUMMY 1
/* Enable various cdrom drivers */
#define SDL_CDROM_OS2 1
......
include/SDL_config_win32.h
View file @ 66d3d818
......@@ -115,6 +115,8 @@ typedef unsigned int uintptr_t;
#define SDL_AUDIO_DRIVER_DSOUND 1
#endif
#define SDL_AUDIO_DRIVER_WAVEOUT 1
#define SDL_AUDIO_DRIVER_DISK 1
#define SDL_AUDIO_DRIVER_DUMMY 1
/* Enable various cdrom drivers */
#ifdef _WIN32_WCE
......
src/audio/SDL_audio.c
View file @ 66d3d818
......@@ -95,6 +95,9 @@ static AudioBootStrap *bootstrap[] = {
#if SDL_AUDIO_DRIVER_DISK
&DISKAUD_bootstrap,
#endif
#if SDL_AUDIO_DRIVER_DUMMY
&DUMMYAUD_bootstrap,
#endif
#if SDL_AUDIO_DRIVER_DC
&DCAUD_bootstrap,
#endif
......
src/audio/SDL_sysaudio.h
View file @ 66d3d818
......@@ -159,6 +159,9 @@ extern AudioBootStrap MINTAUDIO_DMA8_bootstrap;
#if SDL_AUDIO_DRIVER_DISK
extern AudioBootStrap DISKAUD_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_DUMMY
extern AudioBootStrap DUMMYAUD_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_DC
extern AudioBootStrap DCAUD_bootstrap;
#endif
......
src/audio/dummy/.cvsignore 0 → 100644
View file @ 66d3d818
Makefile.in
Makefile
.libs
*.o
*.lo
*.la
src/audio/dummy/SDL_dummyaudio.c 0 → 100644
View file @ 66d3d818
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
This file hacked^H^H^H^H^H^Hwritten by Ryan C. Gordon
(icculus@icculus.org)
*/
#include "SDL_config.h"
/* Output raw audio data to a file. */
#if HAVE_STDIO_H
#include <stdio.h>
#endif
#include "SDL_rwops.h"
#include "SDL_timer.h"
#include "SDL_audio.h"
#include "../SDL_audiomem.h"
#include "../SDL_audio_c.h"
#include "../SDL_audiodev_c.h"
#include "SDL_dummyaudio.h"
/* The tag name used by DUMMY audio */
#define DUMMYAUD_DRIVER_NAME "dummy"
/* environment variables and defaults. */
#define DUMMYENVR_WRITEDELAY "SDL_DUMMYAUDIODELAY"
#define DUMMYDEFAULT_WRITEDELAY 150
/* Audio driver functions */
static int DUMMYAUD_OpenAudio(_THIS, SDL_AudioSpec *spec);
static void DUMMYAUD_WaitAudio(_THIS);
static void DUMMYAUD_PlayAudio(_THIS);
static Uint8 *DUMMYAUD_GetAudioBuf(_THIS);
static void DUMMYAUD_CloseAudio(_THIS);
/* Audio driver bootstrap functions */
static int DUMMYAUD_Available(void)
{
const char *envr = SDL_getenv("SDL_AUDIODRIVER");
if (envr && (SDL_strcmp(envr, DUMMYAUD_DRIVER_NAME) == 0)) {
return(1);
}
return(0);
}
static void DUMMYAUD_DeleteDevice(SDL_AudioDevice *device)
{
SDL_free(device->hidden);
SDL_free(device);
}
static SDL_AudioDevice *DUMMYAUD_CreateDevice(int devindex)
{
SDL_AudioDevice *this;
const char *envr;
/* Initialize all variables that we clean on shutdown */
this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
if ( this ) {
SDL_memset(this, 0, (sizeof *this));
this->hidden = (struct SDL_PrivateAudioData *)
SDL_malloc((sizeof *this->hidden));
}
if ( (this == NULL) || (this->hidden == NULL) ) {
SDL_OutOfMemory();
if ( this ) {
SDL_free(this);
}
return(0);
}
SDL_memset(this->hidden, 0, (sizeof *this->hidden));
envr = SDL_getenv(DUMMYENVR_WRITEDELAY);
this->hidden->write_delay = (envr) ? SDL_atoi(envr) : DUMMYDEFAULT_WRITEDELAY;
/* Set the function pointers */
this->OpenAudio = DUMMYAUD_OpenAudio;
this->WaitAudio = DUMMYAUD_WaitAudio;
this->PlayAudio = DUMMYAUD_PlayAudio;
this->GetAudioBuf = DUMMYAUD_GetAudioBuf;
this->CloseAudio = DUMMYAUD_CloseAudio;
this->free = DUMMYAUD_DeleteDevice;
return this;
}
AudioBootStrap DUMMYAUD_bootstrap = {
DUMMYAUD_DRIVER_NAME, "SDL dummy audio driver",
DUMMYAUD_Available, DUMMYAUD_CreateDevice
};
/* This function waits until it is possible to write a full sound buffer */
static void DUMMYAUD_WaitAudio(_THIS)
{
SDL_Delay(this->hidden->write_delay);
}
static void DUMMYAUD_PlayAudio(_THIS)
{
/* no-op...this is a null driver. */
}
static Uint8 *DUMMYAUD_GetAudioBuf(_THIS)
{
return(this->hidden->mixbuf);
}
static void DUMMYAUD_CloseAudio(_THIS)
{
if ( this->hidden->mixbuf != NULL ) {
SDL_FreeAudioMem(this->hidden->mixbuf);
this->hidden->mixbuf = NULL;
}
}
static int DUMMYAUD_OpenAudio(_THIS, SDL_AudioSpec *spec)
{
#if HAVE_STDIO_H
fprintf(stderr, "\nWARNING: You are using the SDL dummy audio driver!"
" No sound will be output!\n\n");
#endif
/* Allocate mixing buffer */
this->hidden->mixlen = spec->size;
this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
if ( this->hidden->mixbuf == NULL ) {
return(-1);
}
SDL_memset(this->hidden->mixbuf, spec->silence, spec->size);
/* We're ready to rock and roll. :-) */
return(0);
}
src/audio/dummy/SDL_dummyaudio.h 0 → 100644
View file @ 66d3d818
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#ifndef _SDL_dummyaudio_h
#define _SDL_dummyaudio_h
#include "../SDL_sysaudio.h"
/* Hidden "this" pointer for the video functions */
#define _THIS SDL_AudioDevice *this
struct SDL_PrivateAudioData {
/* The file descriptor for the audio device */
Uint8 *mixbuf;
Uint32 mixlen;
Uint32 write_delay;
};
#endif /* _SDL_dummyaudio_h */
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