Mercurial > sdl-ios-xcode
view src/audio/sun/SDL_sunaudio.c @ 1133:609c060fd2a2
The MacOSX Carbon/Cocoa/X11 all in one library patch. Relevant emails:
To: SDL Developers <sdl@libsdl.org>
From: =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb@algonet.se>
Date: Mon, 30 May 2005 23:29:04 +0200
Subject: [SDL] Mac OS X Video Drivers [patch]
I've updated/added the Carbon and X11 video drivers
to the Mac OS X port of SDL 1.2 (the CVS version),
and made the Cocoa driver and runtime *optional*.
The default is still Cocoa, and the "Quartz" driver.
But you can now also use "toolbox" for Carbon, and
"x11" for running with Apple's (or other) X11 server:
export SDL_VIDEODRIVER=x11
export SDL_VIDEO_GL_DRIVER=/usr/X11R6/lib/libGL.dylib
It also checks if the frameworks are available, by a:
#include <Carbon/Carbon.h> or #import <Cocoa/Cocoa.h>
(this should make it configure on plain Darwin as well?)
Here are the new configure targets:
--enable-video-cocoa use Cocoa/Quartz video driver default=yes
--enable-video-carbon use Carbon/QuickDraw video driver default=yes
--enable-video-x11 use X11 video driver default=no
./configure --enable-video-cocoa --enable-video-carbon
--enable-video-x11 \
--x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib
The Carbon version is just an updated version of the old
SDL driver for Mac OS 9, and could probably be improved...
(but it does work, including the Carbon version of SDLmain)
If you disable cocoa, you can run with -framework Carbon only,
and the C version of SDL_main.c. And if you disable carbon too,
you can still use the X11 version which doesn't require SDLmain.
I updated the DrawSprocket version, but did not include it.
(no blitters or VRAM GWorlds etc. available on OS X anyway)
Besides for Mac OS 9, I don't think there's any use for it ?
And note that any performance on Mac OS X equals OpenGL anyway...
You can get "fair" software SDL results on captured CG displays,
but for decent frame rates you need to be using GL for rendering.
Finally, here is the patch itself:
http://www.algonet.se/~afb/SDL-12CVS-macvideo.patch
--anders
PS. It says "video", but as usual it applies to mouse/keyboard too.
------
To: A list for developers using the SDL library <sdl@libsdl.org>
From: =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb@algonet.se>
Date: Sun, 4 Sep 2005 10:02:15 +0200
Subject: [SDL] Updated Mac patch
Updated the previous Mac patch to disable Carbon by default.
Also "fixed" the SDL.spec again, so that it builds on Darwin.
http://www.algonet.se/~afb/SDL-1.2.9-mac.patch
Also applied fine to SDL12 CVS, when I tried it.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Thu, 08 Sep 2005 06:16:14 +0000 |
parents | b8d311d90021 |
children | a9542c38dcdb |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif /* Allow access to a raw mixing buffer */ #include <stdlib.h> #include <stdio.h> #include <fcntl.h> #include <errno.h> #include <string.h> #ifdef __NetBSD__ #include <sys/ioctl.h> #include <sys/audioio.h> #endif #ifdef __SVR4 #include <sys/audioio.h> #else #include <sys/time.h> #include <sys/types.h> #endif #include <unistd.h> #include "SDL_endian.h" #include "SDL_audio.h" #include "SDL_audiomem.h" #include "SDL_audiodev_c.h" #include "SDL_sunaudio.h" #include "SDL_audio_c.h" #include "SDL_timer.h" /* Open the audio device for playback, and don't block if busy */ #define OPEN_FLAGS (O_WRONLY|O_NONBLOCK) /* Audio driver functions */ static int DSP_OpenAudio(_THIS, SDL_AudioSpec *spec); static void DSP_WaitAudio(_THIS); static void DSP_PlayAudio(_THIS); static Uint8 *DSP_GetAudioBuf(_THIS); static void DSP_CloseAudio(_THIS); /* Audio driver bootstrap functions */ static int Audio_Available(void) { int fd; int available; available = 0; fd = SDL_OpenAudioPath(NULL, 0, OPEN_FLAGS, 1); if ( fd >= 0 ) { available = 1; close(fd); } return(available); } static void Audio_DeleteDevice(SDL_AudioDevice *device) { free(device->hidden); free(device); } static SDL_AudioDevice *Audio_CreateDevice(int devindex) { SDL_AudioDevice *this; /* Initialize all variables that we clean on shutdown */ this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); if ( this ) { memset(this, 0, (sizeof *this)); this->hidden = (struct SDL_PrivateAudioData *) malloc((sizeof *this->hidden)); } if ( (this == NULL) || (this->hidden == NULL) ) { SDL_OutOfMemory(); if ( this ) { free(this); } return(0); } memset(this->hidden, 0, (sizeof *this->hidden)); audio_fd = -1; /* Set the function pointers */ this->OpenAudio = DSP_OpenAudio; this->WaitAudio = DSP_WaitAudio; this->PlayAudio = DSP_PlayAudio; this->GetAudioBuf = DSP_GetAudioBuf; this->CloseAudio = DSP_CloseAudio; this->free = Audio_DeleteDevice; return this; } AudioBootStrap SUNAUDIO_bootstrap = { "audio", "UNIX /dev/audio interface", Audio_Available, Audio_CreateDevice }; #ifdef DEBUG_AUDIO void CheckUnderflow(_THIS) { #ifdef AUDIO_GETINFO audio_info_t info; int left; ioctl(audio_fd, AUDIO_GETINFO, &info); left = (written - info.play.samples); if ( written && (left == 0) ) { fprintf(stderr, "audio underflow!\n"); } #endif } #endif void DSP_WaitAudio(_THIS) { #ifdef AUDIO_GETINFO #define SLEEP_FUDGE 10 /* 10 ms scheduling fudge factor */ audio_info_t info; Sint32 left; ioctl(audio_fd, AUDIO_GETINFO, &info); left = (written - info.play.samples); if ( left > fragsize ) { Sint32 sleepy; sleepy = ((left - fragsize)/frequency); sleepy -= SLEEP_FUDGE; if ( sleepy > 0 ) { SDL_Delay(sleepy); } } #else fd_set fdset; FD_ZERO(&fdset); FD_SET(audio_fd, &fdset); select(audio_fd+1, NULL, &fdset, NULL, NULL); #endif } void DSP_PlayAudio(_THIS) { static Uint8 snd2au(int sample); /* Write the audio data */ if ( ulaw_only ) { /* Assuming that this->spec.freq >= 8000 Hz */ int accum, incr, pos; Uint8 *aubuf; accum = 0; incr = this->spec.freq/8; aubuf = ulaw_buf; switch (audio_fmt & 0xFF) { case 8: { Uint8 *sndbuf; sndbuf = mixbuf; for ( pos=0; pos < fragsize; ++pos ) { *aubuf = snd2au((0x80-*sndbuf)*64); accum += incr; while ( accum > 0 ) { accum -= 1000; sndbuf += 1; } aubuf += 1; } } break; case 16: { Sint16 *sndbuf; sndbuf = (Sint16 *)mixbuf; for ( pos=0; pos < fragsize; ++pos ) { *aubuf = snd2au(*sndbuf/4); accum += incr; while ( accum > 0 ) { accum -= 1000; sndbuf += 1; } aubuf += 1; } } break; } #ifdef DEBUG_AUDIO CheckUnderflow(this); #endif if ( write(audio_fd, ulaw_buf, fragsize) < 0 ) { /* Assume fatal error, for now */ this->enabled = 0; } written += fragsize; } else { #ifdef DEBUG_AUDIO CheckUnderflow(this); #endif if ( write(audio_fd, mixbuf, this->spec.size) < 0 ) { /* Assume fatal error, for now */ this->enabled = 0; } written += fragsize; } } Uint8 *DSP_GetAudioBuf(_THIS) { return(mixbuf); } void DSP_CloseAudio(_THIS) { if ( mixbuf != NULL ) { SDL_FreeAudioMem(mixbuf); mixbuf = NULL; } if ( ulaw_buf != NULL ) { free(ulaw_buf); ulaw_buf = NULL; } close(audio_fd); } int DSP_OpenAudio(_THIS, SDL_AudioSpec *spec) { char audiodev[1024]; #ifdef AUDIO_SETINFO int enc; #endif int desired_freq = spec->freq; /* Initialize our freeable variables, in case we fail*/ audio_fd = -1; mixbuf = NULL; ulaw_buf = NULL; /* Determine the audio parameters from the AudioSpec */ switch ( spec->format & 0xFF ) { case 8: { /* Unsigned 8 bit audio data */ spec->format = AUDIO_U8; #ifdef AUDIO_SETINFO enc = AUDIO_ENCODING_LINEAR8; #endif } break; case 16: { /* Signed 16 bit audio data */ spec->format = AUDIO_S16SYS; #ifdef AUDIO_SETINFO enc = AUDIO_ENCODING_LINEAR; #endif } break; default: { SDL_SetError("Unsupported audio format"); return(-1); } } audio_fmt = spec->format; /* Open the audio device */ audio_fd = SDL_OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 1); if ( audio_fd < 0 ) { SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); return(-1); } ulaw_only = 0; /* modern Suns do support linear audio */ #ifdef AUDIO_SETINFO for(;;) { audio_info_t info; AUDIO_INITINFO(&info); /* init all fields to "no change" */ /* Try to set the requested settings */ info.play.sample_rate = spec->freq; info.play.channels = spec->channels; info.play.precision = (enc == AUDIO_ENCODING_ULAW) ? 8 : spec->format & 0xff; info.play.encoding = enc; if( ioctl(audio_fd, AUDIO_SETINFO, &info) == 0 ) { /* Check to be sure we got what we wanted */ if(ioctl(audio_fd, AUDIO_GETINFO, &info) < 0) { SDL_SetError("Error getting audio parameters: %s", strerror(errno)); return -1; } if(info.play.encoding == enc && info.play.precision == (spec->format & 0xff) && info.play.channels == spec->channels) { /* Yow! All seems to be well! */ spec->freq = info.play.sample_rate; break; } } switch(enc) { case AUDIO_ENCODING_LINEAR8: /* unsigned 8bit apparently not supported here */ enc = AUDIO_ENCODING_LINEAR; spec->format = AUDIO_S16SYS; break; /* try again */ case AUDIO_ENCODING_LINEAR: /* linear 16bit didn't work either, resort to µ-law */ enc = AUDIO_ENCODING_ULAW; spec->channels = 1; spec->freq = 8000; spec->format = AUDIO_U8; ulaw_only = 1; break; default: /* oh well... */ SDL_SetError("Error setting audio parameters: %s", strerror(errno)); return -1; } } #endif /* AUDIO_SETINFO */ written = 0; /* We can actually convert on-the-fly to U-Law */ if ( ulaw_only ) { spec->freq = desired_freq; fragsize = (spec->samples*1000)/(spec->freq/8); frequency = 8; ulaw_buf = (Uint8 *)malloc(fragsize); if ( ulaw_buf == NULL ) { SDL_OutOfMemory(); return(-1); } spec->channels = 1; } else { fragsize = spec->samples; frequency = spec->freq/1000; } #ifdef DEBUG_AUDIO fprintf(stderr, "Audio device %s U-Law only\n", ulaw_only ? "is" : "is not"); fprintf(stderr, "format=0x%x chan=%d freq=%d\n", spec->format, spec->channels, spec->freq); #endif /* Update the fragment size as size in bytes */ SDL_CalculateAudioSpec(spec); /* Allocate mixing buffer */ mixbuf = (Uint8 *)SDL_AllocAudioMem(spec->size); if ( mixbuf == NULL ) { SDL_OutOfMemory(); return(-1); } memset(mixbuf, spec->silence, spec->size); /* We're ready to rock and roll. :-) */ return(0); } /************************************************************************/ /* This function (snd2au()) copyrighted: */ /************************************************************************/ /* Copyright 1989 by Rich Gopstein and Harris Corporation */ /* */ /* Permission to use, copy, modify, and distribute this software */ /* and its documentation for any purpose and without fee is */ /* hereby granted, provided that the above copyright notice */ /* appears in all copies and that both that copyright notice and */ /* this permission notice appear in supporting documentation, and */ /* that the name of Rich Gopstein and Harris Corporation not be */ /* used in advertising or publicity pertaining to distribution */ /* of the software without specific, written prior permission. */ /* Rich Gopstein and Harris Corporation make no representations */ /* about the suitability of this software for any purpose. It */ /* provided "as is" without express or implied warranty. */ /************************************************************************/ static Uint8 snd2au(int sample) { int mask; if (sample < 0) { sample = -sample; mask = 0x7f; } else { mask = 0xff; } if (sample < 32) { sample = 0xF0 | (15 - sample / 2); } else if (sample < 96) { sample = 0xE0 | (15 - (sample - 32) / 4); } else if (sample < 224) { sample = 0xD0 | (15 - (sample - 96) / 8); } else if (sample < 480) { sample = 0xC0 | (15 - (sample - 224) / 16); } else if (sample < 992) { sample = 0xB0 | (15 - (sample - 480) / 32); } else if (sample < 2016) { sample = 0xA0 | (15 - (sample - 992) / 64); } else if (sample < 4064) { sample = 0x90 | (15 - (sample - 2016) / 128); } else if (sample < 8160) { sample = 0x80 | (15 - (sample - 4064) / 256); } else { sample = 0x80; } return (mask & sample); }