Mercurial > sdl-ios-xcode
annotate src/audio/esd/SDL_esdaudio.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 | 0c892e99b65b |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Allow access to an ESD network stream mixing buffer */ | |
| 29 | |
| 30 #ifdef ESD_SUPPORT | |
| 31 | |
| 32 #include <stdlib.h> | |
| 33 #include <stdio.h> | |
| 34 #include <string.h> | |
| 35 #include <errno.h> | |
| 36 #include <signal.h> | |
| 37 #include <unistd.h> | |
| 38 | |
| 39 #include <esd.h> | |
| 40 | |
| 41 #include "SDL_audio.h" | |
| 42 #include "SDL_error.h" | |
| 43 #include "SDL_audiomem.h" | |
| 44 #include "SDL_audio_c.h" | |
| 45 #include "SDL_timer.h" | |
| 46 #include "SDL_audiodev_c.h" | |
| 47 #include "SDL_esdaudio.h" | |
| 48 | |
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49 #ifdef ESD_DYNAMIC |
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50 #include "SDL_name.h" |
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51 #include "SDL_loadso.h" |
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52 #else |
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53 #define SDL_NAME(X) X |
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54 #endif |
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55 |
| 0 | 56 /* The tag name used by ESD audio */ |
| 57 #define ESD_DRIVER_NAME "esd" | |
| 58 | |
| 59 /* Audio driver functions */ | |
| 60 static int ESD_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 61 static void ESD_WaitAudio(_THIS); | |
| 62 static void ESD_PlayAudio(_THIS); | |
| 63 static Uint8 *ESD_GetAudioBuf(_THIS); | |
| 64 static void ESD_CloseAudio(_THIS); | |
| 65 | |
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66 #ifdef ESD_DYNAMIC |
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67 |
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68 static const char *esd_library = ESD_DYNAMIC; |
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69 static void *esd_handle = NULL; |
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70 static int esd_loaded = 0; |
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71 |
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72 static int (*SDL_NAME(esd_open_sound))( const char *host ); |
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73 static int (*SDL_NAME(esd_close))( int esd ); |
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74 static int (*SDL_NAME(esd_play_stream))( esd_format_t format, int rate, |
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75 const char *host, const char *name ); |
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76 static struct { |
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77 const char *name; |
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78 void **func; |
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79 } esd_functions[] = { |
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80 { "esd_open_sound", (void **)&SDL_NAME(esd_open_sound) }, |
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81 { "esd_close", (void **)&SDL_NAME(esd_close) }, |
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82 { "esd_play_stream", (void **)&SDL_NAME(esd_play_stream) }, |
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83 }; |
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84 |
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85 static void UnloadESDLibrary() |
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86 { |
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87 if ( esd_loaded ) { |
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88 SDL_UnloadObject(esd_handle); |
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89 esd_handle = NULL; |
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90 esd_loaded = 0; |
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91 } |
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92 } |
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93 |
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94 static int LoadESDLibrary(void) |
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95 { |
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96 int i, retval = -1; |
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97 |
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98 esd_handle = SDL_LoadObject(esd_library); |
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99 if ( esd_handle ) { |
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100 esd_loaded = 1; |
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101 retval = 0; |
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102 for ( i=0; i<SDL_TABLESIZE(esd_functions); ++i ) { |
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103 *esd_functions[i].func = SDL_LoadFunction(esd_handle, esd_functions[i].name); |
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104 if ( !*esd_functions[i].func ) { |
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105 retval = -1; |
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106 UnloadESDLibrary(); |
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107 break; |
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108 } |
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109 } |
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110 } |
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111 return retval; |
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112 } |
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113 |
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114 #else |
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115 |
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116 static void UnloadESDLibrary() |
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117 { |
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118 return; |
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119 } |
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120 |
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121 static int LoadESDLibrary(void) |
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122 { |
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123 return 0; |
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124 } |
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125 |
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126 #endif /* ESD_DYNAMIC */ |
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127 |
| 0 | 128 /* Audio driver bootstrap functions */ |
| 129 | |
| 130 static int Audio_Available(void) | |
| 131 { | |
| 132 int connection; | |
| 133 int available; | |
| 134 | |
| 135 available = 0; | |
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136 if ( LoadESDLibrary() < 0 ) { |
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137 return available; |
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138 } |
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139 connection = SDL_NAME(esd_open_sound)(NULL); |
| 0 | 140 if ( connection >= 0 ) { |
| 141 available = 1; | |
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142 SDL_NAME(esd_close)(connection); |
| 0 | 143 } |
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144 UnloadESDLibrary(); |
| 0 | 145 return(available); |
| 146 } | |
| 147 | |
| 148 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 149 { | |
| 150 free(device->hidden); | |
| 151 free(device); | |
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152 UnloadESDLibrary(); |
| 0 | 153 } |
| 154 | |
| 155 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 156 { | |
| 157 SDL_AudioDevice *this; | |
| 158 | |
| 159 /* Initialize all variables that we clean on shutdown */ | |
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160 LoadESDLibrary(); |
| 0 | 161 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); |
| 162 if ( this ) { | |
| 163 memset(this, 0, (sizeof *this)); | |
| 164 this->hidden = (struct SDL_PrivateAudioData *) | |
| 165 malloc((sizeof *this->hidden)); | |
| 166 } | |
| 167 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 168 SDL_OutOfMemory(); | |
| 169 if ( this ) { | |
| 170 free(this); | |
| 171 } | |
| 172 return(0); | |
| 173 } | |
| 174 memset(this->hidden, 0, (sizeof *this->hidden)); | |
| 175 audio_fd = -1; | |
| 176 | |
| 177 /* Set the function pointers */ | |
| 178 this->OpenAudio = ESD_OpenAudio; | |
| 179 this->WaitAudio = ESD_WaitAudio; | |
| 180 this->PlayAudio = ESD_PlayAudio; | |
| 181 this->GetAudioBuf = ESD_GetAudioBuf; | |
| 182 this->CloseAudio = ESD_CloseAudio; | |
| 183 | |
| 184 this->free = Audio_DeleteDevice; | |
| 185 | |
| 186 return this; | |
| 187 } | |
| 188 | |
| 189 AudioBootStrap ESD_bootstrap = { | |
| 190 ESD_DRIVER_NAME, "Enlightened Sound Daemon", | |
| 191 Audio_Available, Audio_CreateDevice | |
| 192 }; | |
| 193 | |
| 194 /* This function waits until it is possible to write a full sound buffer */ | |
| 195 static void ESD_WaitAudio(_THIS) | |
| 196 { | |
| 197 Sint32 ticks; | |
| 198 | |
| 199 /* Check to see if the thread-parent process is still alive */ | |
| 200 { static int cnt = 0; | |
| 201 /* Note that this only works with thread implementations | |
| 202 that use a different process id for each thread. | |
| 203 */ | |
| 204 if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */ | |
| 205 if ( kill(parent, 0) < 0 ) { | |
| 206 this->enabled = 0; | |
| 207 } | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 /* Use timer for general audio synchronization */ | |
| 212 ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS; | |
| 213 if ( ticks > 0 ) { | |
| 214 SDL_Delay(ticks); | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 static void ESD_PlayAudio(_THIS) | |
| 219 { | |
| 220 int written; | |
| 221 | |
| 222 /* Write the audio data, checking for EAGAIN on broken audio drivers */ | |
| 223 do { | |
| 224 written = write(audio_fd, mixbuf, mixlen); | |
| 225 if ( (written < 0) && ((errno == 0) || (errno == EAGAIN)) ) { | |
| 226 SDL_Delay(1); /* Let a little CPU time go by */ | |
| 227 } | |
| 228 } while ( (written < 0) && | |
| 229 ((errno == 0) || (errno == EAGAIN) || (errno == EINTR)) ); | |
| 230 | |
| 231 /* Set the next write frame */ | |
| 232 next_frame += frame_ticks; | |
| 233 | |
| 234 /* If we couldn't write, assume fatal error for now */ | |
| 235 if ( written < 0 ) { | |
| 236 this->enabled = 0; | |
| 237 } | |
| 238 } | |
| 239 | |
| 240 static Uint8 *ESD_GetAudioBuf(_THIS) | |
| 241 { | |
| 242 return(mixbuf); | |
| 243 } | |
| 244 | |
| 245 static void ESD_CloseAudio(_THIS) | |
| 246 { | |
| 247 if ( mixbuf != NULL ) { | |
| 248 SDL_FreeAudioMem(mixbuf); | |
| 249 mixbuf = NULL; | |
| 250 } | |
| 251 if ( audio_fd >= 0 ) { | |
|
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|
252 SDL_NAME(esd_close)(audio_fd); |
| 0 | 253 audio_fd = -1; |
| 254 } | |
| 255 } | |
| 256 | |
| 257 /* Try to get the name of the program */ | |
| 258 static char *get_progname(void) | |
| 259 { | |
| 260 char *progname = NULL; | |
| 261 #ifdef linux | |
| 262 FILE *fp; | |
| 263 static char temp[BUFSIZ]; | |
| 264 | |
| 265 sprintf(temp, "/proc/%d/cmdline", getpid()); | |
| 266 fp = fopen(temp, "r"); | |
| 267 if ( fp != NULL ) { | |
| 268 if ( fgets(temp, sizeof(temp)-1, fp) ) { | |
| 269 progname = strrchr(temp, '/'); | |
| 270 if ( progname == NULL ) { | |
| 271 progname = temp; | |
| 272 } else { | |
| 273 progname = progname+1; | |
| 274 } | |
| 275 } | |
| 276 fclose(fp); | |
| 277 } | |
| 278 #endif | |
| 279 return(progname); | |
| 280 } | |
| 281 | |
| 282 static int ESD_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 283 { | |
| 284 esd_format_t format; | |
| 285 | |
| 286 /* Convert audio spec to the ESD audio format */ | |
| 287 format = (ESD_STREAM | ESD_PLAY); | |
| 288 switch ( spec->format & 0xFF ) { | |
| 289 case 8: | |
| 290 format |= ESD_BITS8; | |
| 291 break; | |
| 292 case 16: | |
| 293 format |= ESD_BITS16; | |
| 294 break; | |
| 295 default: | |
| 296 SDL_SetError("Unsupported ESD audio format"); | |
| 297 return(-1); | |
| 298 } | |
| 299 if ( spec->channels == 1 ) { | |
| 300 format |= ESD_MONO; | |
| 301 } else { | |
| 302 format |= ESD_STEREO; | |
| 303 } | |
| 304 #if 0 | |
| 305 spec->samples = ESD_BUF_SIZE; /* Darn, no way to change this yet */ | |
| 306 #endif | |
| 307 | |
| 308 /* Open a connection to the ESD audio server */ | |
|
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parents:
252
diff
changeset
|
309 audio_fd = SDL_NAME(esd_play_stream)(format, spec->freq, NULL, get_progname()); |
| 0 | 310 if ( audio_fd < 0 ) { |
| 311 SDL_SetError("Couldn't open ESD connection"); | |
| 312 return(-1); | |
| 313 } | |
| 314 | |
| 315 /* Calculate the final parameters for this audio specification */ | |
| 316 SDL_CalculateAudioSpec(spec); | |
| 317 frame_ticks = (float)(spec->samples*1000)/spec->freq; | |
| 318 next_frame = SDL_GetTicks()+frame_ticks; | |
| 319 | |
| 320 /* Allocate mixing buffer */ | |
| 321 mixlen = spec->size; | |
| 322 mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); | |
| 323 if ( mixbuf == NULL ) { | |
| 324 return(-1); | |
| 325 } | |
| 326 memset(mixbuf, spec->silence, spec->size); | |
| 327 | |
| 328 /* Get the parent process id (we're the parent of the audio thread) */ | |
| 329 parent = getpid(); | |
| 330 | |
| 331 /* We're ready to rock and roll. :-) */ | |
| 332 return(0); | |
| 333 } | |
| 334 | |
| 335 #endif /* ESD_SUPPORT */ |