Mercurial > sdl-ios-xcode
view src/audio/arts/SDL_artsaudio.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 | 4263beff9e38 |
children | c9b51268668f |
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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 <sys/types.h> #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include <signal.h> #include <unistd.h> #include "SDL_audio.h" #include "SDL_error.h" #include "SDL_audiomem.h" #include "SDL_audio_c.h" #include "SDL_timer.h" #include "SDL_audiodev_c.h" #include "SDL_artsaudio.h" #ifdef ARTSC_DYNAMIC #include "SDL_name.h" #include "SDL_loadso.h" #else #define SDL_NAME(X) X #endif /* The tag name used by artsc audio */ #define ARTSC_DRIVER_NAME "arts" /* Audio driver functions */ static int ARTSC_OpenAudio(_THIS, SDL_AudioSpec *spec); static void ARTSC_WaitAudio(_THIS); static void ARTSC_PlayAudio(_THIS); static Uint8 *ARTSC_GetAudioBuf(_THIS); static void ARTSC_CloseAudio(_THIS); #ifdef ARTSC_DYNAMIC static const char *arts_library = ARTSC_DYNAMIC; static void *arts_handle = NULL; static int arts_loaded = 0; static int (*SDL_NAME(arts_init))(void); static void (*SDL_NAME(arts_free))(void); static arts_stream_t (*SDL_NAME(arts_play_stream))(int rate, int bits, int channels, const char *name); static int (*SDL_NAME(arts_stream_set))(arts_stream_t s, arts_parameter_t param, int value); static int (*SDL_NAME(arts_stream_get))(arts_stream_t s, arts_parameter_t param); static int (*SDL_NAME(arts_write))(arts_stream_t s, const void *buffer, int count); static void (*SDL_NAME(arts_close_stream))(arts_stream_t s); static struct { const char *name; void **func; } arts_functions[] = { { "arts_init", (void **)&SDL_NAME(arts_init) }, { "arts_free", (void **)&SDL_NAME(arts_free) }, { "arts_play_stream", (void **)&SDL_NAME(arts_play_stream) }, { "arts_stream_set", (void **)&SDL_NAME(arts_stream_set) }, { "arts_stream_get", (void **)&SDL_NAME(arts_stream_get) }, { "arts_write", (void **)&SDL_NAME(arts_write) }, { "arts_close_stream", (void **)&SDL_NAME(arts_close_stream) }, }; static void UnloadARTSLibrary() { if ( arts_loaded ) { SDL_UnloadObject(arts_handle); arts_handle = NULL; arts_loaded = 0; } } static int LoadARTSLibrary(void) { int i, retval = -1; arts_handle = SDL_LoadObject(arts_library); if ( arts_handle ) { arts_loaded = 1; retval = 0; for ( i=0; i<SDL_TABLESIZE(arts_functions); ++i ) { *arts_functions[i].func = SDL_LoadFunction(arts_handle, arts_functions[i].name); if ( !*arts_functions[i].func ) { retval = -1; UnloadARTSLibrary(); break; } } } return retval; } #else static void UnloadARTSLibrary() { return; } static int LoadARTSLibrary(void) { return 0; } #endif /* ARTSC_DYNAMIC */ /* Audio driver bootstrap functions */ static int Audio_Available(void) { int available = 0; if ( LoadARTSLibrary() < 0 ) { return available; } if ( SDL_NAME(arts_init)() == 0 ) { #define ARTS_CRASH_HACK /* Play a stream so aRts doesn't crash */ #ifdef ARTS_CRASH_HACK arts_stream_t stream2; stream2=SDL_NAME(arts_play_stream)(44100, 16, 2, "SDL"); SDL_NAME(arts_write)(stream2, "", 0); SDL_NAME(arts_close_stream)(stream2); #endif available = 1; SDL_NAME(arts_free)(); } UnloadARTSLibrary(); return available; } static void Audio_DeleteDevice(SDL_AudioDevice *device) { free(device->hidden); free(device); UnloadARTSLibrary(); } static SDL_AudioDevice *Audio_CreateDevice(int devindex) { SDL_AudioDevice *this; /* Initialize all variables that we clean on shutdown */ LoadARTSLibrary(); 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)); stream = 0; /* Set the function pointers */ this->OpenAudio = ARTSC_OpenAudio; this->WaitAudio = ARTSC_WaitAudio; this->PlayAudio = ARTSC_PlayAudio; this->GetAudioBuf = ARTSC_GetAudioBuf; this->CloseAudio = ARTSC_CloseAudio; this->free = Audio_DeleteDevice; return this; } AudioBootStrap ARTSC_bootstrap = { ARTSC_DRIVER_NAME, "Analog Realtime Synthesizer", Audio_Available, Audio_CreateDevice }; /* This function waits until it is possible to write a full sound buffer */ static void ARTSC_WaitAudio(_THIS) { Sint32 ticks; /* Check to see if the thread-parent process is still alive */ { static int cnt = 0; /* Note that this only works with thread implementations that use a different process id for each thread. */ if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */ if ( kill(parent, 0) < 0 ) { this->enabled = 0; } } } /* Use timer for general audio synchronization */ ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS; if ( ticks > 0 ) { SDL_Delay(ticks); } } static void ARTSC_PlayAudio(_THIS) { int written; /* Write the audio data */ written = SDL_NAME(arts_write)(stream, mixbuf, mixlen); /* If timer synchronization is enabled, set the next write frame */ if ( frame_ticks ) { next_frame += frame_ticks; } /* If we couldn't write, assume fatal error for now */ if ( written < 0 ) { this->enabled = 0; } #ifdef DEBUG_AUDIO fprintf(stderr, "Wrote %d bytes of audio data\n", written); #endif } static Uint8 *ARTSC_GetAudioBuf(_THIS) { return(mixbuf); } static void ARTSC_CloseAudio(_THIS) { if ( mixbuf != NULL ) { SDL_FreeAudioMem(mixbuf); mixbuf = NULL; } if ( stream ) { SDL_NAME(arts_close_stream)(stream); stream = 0; } SDL_NAME(arts_free)(); } static int ARTSC_OpenAudio(_THIS, SDL_AudioSpec *spec) { int bits, frag_spec; Uint16 test_format, format; /* Reset the timer synchronization flag */ frame_ticks = 0.0; mixbuf = NULL; /* Try for a closest match on audio format */ format = 0; bits = 0; for ( test_format = SDL_FirstAudioFormat(spec->format); ! format && test_format; ) { #ifdef DEBUG_AUDIO fprintf(stderr, "Trying format 0x%4.4x\n", test_format); #endif switch ( test_format ) { case AUDIO_U8: bits = 8; format = 1; break; case AUDIO_S16LSB: bits = 16; format = 1; break; default: format = 0; break; } if ( ! format ) { test_format = SDL_NextAudioFormat(); } } if ( format == 0 ) { SDL_SetError("Couldn't find any hardware audio formats"); return(-1); } spec->format = test_format; if ( SDL_NAME(arts_init)() != 0 ) { SDL_SetError("Unable to initialize ARTS"); return(-1); } stream = SDL_NAME(arts_play_stream)(spec->freq, bits, spec->channels, "SDL"); /* Calculate the final parameters for this audio specification */ SDL_CalculateAudioSpec(spec); /* Determine the power of two of the fragment size */ for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec ); if ( (0x01<<frag_spec) != spec->size ) { SDL_SetError("Fragment size must be a power of two"); return(-1); } frag_spec |= 0x00020000; /* two fragments, for low latency */ #ifdef ARTS_P_PACKET_SETTINGS SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SETTINGS, frag_spec); #else SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SIZE, frag_spec&0xffff); SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_COUNT, frag_spec>>16); #endif spec->size = SDL_NAME(arts_stream_get)(stream, ARTS_P_PACKET_SIZE); /* Allocate mixing buffer */ mixlen = spec->size; mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); if ( mixbuf == NULL ) { return(-1); } memset(mixbuf, spec->silence, spec->size); /* Get the parent process id (we're the parent of the audio thread) */ parent = getpid(); /* We're ready to rock and roll. :-) */ return(0); }