Mercurial > sdl-ios-xcode
annotate src/audio/arts/SDL_artsaudio.c @ 320:66f815c147ed
Date: Thu, 28 Mar 2002 09:20:03 +0200
From: "Mike Gorchak" <mike@malva.ua>
Subject: New QNX patch.
Hi !
1. Removed warning (possible bug) with invalid type, passing to the function
in ph_WarpedMotion.
2. Rewritten handler of Ph_WM_RESIZE message, now works, but buggy (old
handler doesn't work at all).
3. Added stub handler for Ph_WM_MAX (maximize) message.
4. Added more #ifdef HAVE_OPENGL to disable OpenGL stuff when it not needed.
5. Added support for SDL_NOFRAME and SDL_RESIZABLE flags (in OpenGL windows
too).
6. Added cosmetic changes, if no SDL_RESIZABLE flag defined, disable resize
handlers in window border and maximize button at caption.
7. Fixed my bug with invalid arguments count passed to PtCreateWidget call.
8. Fixed some palette problems.
9. Updated README.QNX file.
And I changed testgl.c test application:
10. Added in testgl.c application support for SDL_NOFRAME flag and
option -noframe.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 28 Mar 2002 16:20:10 +0000 |
| parents | fb4c4c6a2773 |
| children | 583a07ab5444 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 a raw mixing buffer */ | |
| 29 | |
| 30 #include <sys/types.h> | |
| 31 #include <stdlib.h> | |
| 32 #include <stdio.h> | |
| 33 #include <string.h> | |
| 34 #include <errno.h> | |
| 35 #include <signal.h> | |
| 36 #include <unistd.h> | |
| 37 | |
| 38 #include "SDL_audio.h" | |
| 39 #include "SDL_error.h" | |
| 40 #include "SDL_audiomem.h" | |
| 41 #include "SDL_audio_c.h" | |
| 42 #include "SDL_timer.h" | |
| 43 #include "SDL_audiodev_c.h" | |
| 44 #include "SDL_artsaudio.h" | |
| 45 | |
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46 #ifdef ARTSC_DYNAMIC |
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47 #include "SDL_name.h" |
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48 #include "SDL_loadso.h" |
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49 #else |
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50 #define SDL_NAME(X) X |
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51 #endif |
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52 |
| 0 | 53 /* The tag name used by artsc audio */ |
| 54 #define ARTSC_DRIVER_NAME "artsc" | |
| 55 | |
| 56 /* Audio driver functions */ | |
| 57 static int ARTSC_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 58 static void ARTSC_WaitAudio(_THIS); | |
| 59 static void ARTSC_PlayAudio(_THIS); | |
| 60 static Uint8 *ARTSC_GetAudioBuf(_THIS); | |
| 61 static void ARTSC_CloseAudio(_THIS); | |
| 62 | |
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63 #ifdef ARTSC_DYNAMIC |
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64 |
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65 static const char *arts_library = ARTSC_DYNAMIC; |
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66 static void *arts_handle = NULL; |
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67 static int arts_loaded = 0; |
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68 |
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69 static int (*SDL_NAME(arts_init))(void); |
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70 static void (*SDL_NAME(arts_free))(void); |
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71 static arts_stream_t (*SDL_NAME(arts_play_stream))(int rate, int bits, int channels, const char *name); |
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72 static int (*SDL_NAME(arts_stream_set))(arts_stream_t s, arts_parameter_t param, int value); |
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73 static int (*SDL_NAME(arts_stream_get))(arts_stream_t s, arts_parameter_t param); |
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74 static int (*SDL_NAME(arts_write))(arts_stream_t s, const void *buffer, int count); |
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75 static void (*SDL_NAME(arts_close_stream))(arts_stream_t s); |
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76 |
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77 static struct { |
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78 const char *name; |
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79 void **func; |
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80 } arts_functions[] = { |
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81 { "arts_init", (void **)&SDL_NAME(arts_init) }, |
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82 { "arts_free", (void **)&SDL_NAME(arts_free) }, |
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83 { "arts_play_stream", (void **)&SDL_NAME(arts_play_stream) }, |
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84 { "arts_stream_set", (void **)&SDL_NAME(arts_stream_set) }, |
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85 { "arts_stream_get", (void **)&SDL_NAME(arts_stream_get) }, |
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86 { "arts_write", (void **)&SDL_NAME(arts_write) }, |
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87 { "arts_close_stream", (void **)&SDL_NAME(arts_close_stream) }, |
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88 }; |
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89 |
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90 static void UnloadARTSLibrary() |
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91 { |
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92 if ( arts_loaded ) { |
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93 SDL_UnloadObject(arts_handle); |
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94 arts_handle = NULL; |
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95 arts_loaded = 0; |
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96 } |
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97 } |
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98 |
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99 static int LoadARTSLibrary(void) |
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100 { |
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101 int i, retval = -1; |
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102 |
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103 arts_handle = SDL_LoadObject(arts_library); |
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104 if ( arts_handle ) { |
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105 arts_loaded = 1; |
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106 retval = 0; |
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107 for ( i=0; i<SDL_TABLESIZE(arts_functions); ++i ) { |
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108 *arts_functions[i].func = SDL_LoadFunction(arts_handle, arts_functions[i].name); |
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109 if ( ! arts_functions[i].func ) { |
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110 retval = -1; |
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111 UnloadARTSLibrary(); |
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112 break; |
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113 } |
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114 } |
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115 } |
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116 return retval; |
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117 } |
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118 |
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119 #else |
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120 |
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121 static void UnloadARTSLibrary() |
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122 { |
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123 return; |
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124 } |
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125 |
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126 static int LoadARTSLibrary(void) |
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127 { |
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128 return 0; |
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129 } |
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130 |
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131 #endif /* ARTSC_DYNAMIC */ |
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132 |
| 0 | 133 /* Audio driver bootstrap functions */ |
| 134 | |
| 135 static int Audio_Available(void) | |
| 136 { | |
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137 int available = 0; |
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138 |
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139 if ( LoadARTSLibrary() < 0 ) { |
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140 return available; |
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141 } |
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142 if ( SDL_NAME(arts_init)() == 0 ) { |
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143 available = 1; |
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144 SDL_NAME(arts_free)(); |
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145 } |
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146 UnloadARTSLibrary(); |
| 0 | 147 } |
| 148 | |
| 149 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 150 { | |
| 151 free(device->hidden); | |
| 152 free(device); | |
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153 UnloadARTSLibrary(); |
| 0 | 154 } |
| 155 | |
| 156 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 157 { | |
| 158 SDL_AudioDevice *this; | |
| 159 | |
| 160 /* Initialize all variables that we clean on shutdown */ | |
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161 LoadARTSLibrary(); |
| 0 | 162 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); |
| 163 if ( this ) { | |
| 164 memset(this, 0, (sizeof *this)); | |
| 165 this->hidden = (struct SDL_PrivateAudioData *) | |
| 166 malloc((sizeof *this->hidden)); | |
| 167 } | |
| 168 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 169 SDL_OutOfMemory(); | |
| 170 if ( this ) { | |
| 171 free(this); | |
| 172 } | |
| 173 return(0); | |
| 174 } | |
| 175 memset(this->hidden, 0, (sizeof *this->hidden)); | |
| 176 stream = 0; | |
| 177 | |
| 178 /* Set the function pointers */ | |
| 179 this->OpenAudio = ARTSC_OpenAudio; | |
| 180 this->WaitAudio = ARTSC_WaitAudio; | |
| 181 this->PlayAudio = ARTSC_PlayAudio; | |
| 182 this->GetAudioBuf = ARTSC_GetAudioBuf; | |
| 183 this->CloseAudio = ARTSC_CloseAudio; | |
| 184 | |
| 185 this->free = Audio_DeleteDevice; | |
| 186 | |
| 187 return this; | |
| 188 } | |
| 189 | |
| 190 AudioBootStrap ARTSC_bootstrap = { | |
| 191 ARTSC_DRIVER_NAME, "Analog Realtime Synthesizer", | |
| 192 Audio_Available, Audio_CreateDevice | |
| 193 }; | |
| 194 | |
| 195 /* This function waits until it is possible to write a full sound buffer */ | |
| 196 static void ARTSC_WaitAudio(_THIS) | |
| 197 { | |
| 198 Sint32 ticks; | |
| 199 | |
| 200 /* Check to see if the thread-parent process is still alive */ | |
| 201 { static int cnt = 0; | |
| 202 /* Note that this only works with thread implementations | |
| 203 that use a different process id for each thread. | |
| 204 */ | |
| 205 if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */ | |
| 206 if ( kill(parent, 0) < 0 ) { | |
| 207 this->enabled = 0; | |
| 208 } | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 /* Use timer for general audio synchronization */ | |
| 213 ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS; | |
| 214 if ( ticks > 0 ) { | |
| 215 SDL_Delay(ticks); | |
| 216 } | |
| 217 } | |
| 218 | |
| 219 static void ARTSC_PlayAudio(_THIS) | |
| 220 { | |
| 221 int written; | |
| 222 | |
| 223 /* Write the audio data */ | |
|
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224 written = SDL_NAME(arts_write)(stream, mixbuf, mixlen); |
| 0 | 225 |
| 226 /* If timer synchronization is enabled, set the next write frame */ | |
| 227 if ( frame_ticks ) { | |
| 228 next_frame += frame_ticks; | |
| 229 } | |
| 230 | |
| 231 /* If we couldn't write, assume fatal error for now */ | |
| 232 if ( written < 0 ) { | |
| 233 this->enabled = 0; | |
| 234 } | |
| 235 #ifdef DEBUG_AUDIO | |
| 236 fprintf(stderr, "Wrote %d bytes of audio data\n", written); | |
| 237 #endif | |
| 238 } | |
| 239 | |
| 240 static Uint8 *ARTSC_GetAudioBuf(_THIS) | |
| 241 { | |
| 242 return(mixbuf); | |
| 243 } | |
| 244 | |
| 245 static void ARTSC_CloseAudio(_THIS) | |
| 246 { | |
| 247 if ( mixbuf != NULL ) { | |
| 248 SDL_FreeAudioMem(mixbuf); | |
| 249 mixbuf = NULL; | |
| 250 } | |
| 251 if ( stream ) { | |
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252 SDL_NAME(arts_close_stream)(stream); |
| 0 | 253 stream = 0; |
| 254 } | |
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255 SDL_NAME(arts_free)(); |
| 0 | 256 } |
| 257 | |
| 258 static int ARTSC_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 259 { | |
| 260 int bits, frag_spec; | |
| 261 Uint16 test_format, format; | |
| 262 | |
| 263 /* Reset the timer synchronization flag */ | |
| 264 frame_ticks = 0.0; | |
| 265 | |
| 266 mixbuf = NULL; | |
| 267 | |
| 268 /* Try for a closest match on audio format */ | |
| 269 format = 0; | |
| 270 bits = 0; | |
| 271 for ( test_format = SDL_FirstAudioFormat(spec->format); | |
| 272 ! format && test_format; ) { | |
| 273 #ifdef DEBUG_AUDIO | |
| 274 fprintf(stderr, "Trying format 0x%4.4x\n", test_format); | |
| 275 #endif | |
| 276 switch ( test_format ) { | |
| 277 case AUDIO_U8: | |
| 278 bits = 8; | |
| 279 format = 1; | |
| 280 break; | |
| 281 case AUDIO_S16LSB: | |
| 282 bits = 16; | |
| 283 format = 1; | |
| 284 break; | |
| 285 default: | |
| 286 format = 0; | |
| 287 break; | |
| 288 } | |
| 289 if ( ! format ) { | |
| 290 test_format = SDL_NextAudioFormat(); | |
| 291 } | |
| 292 } | |
| 293 if ( format == 0 ) { | |
| 294 SDL_SetError("Couldn't find any hardware audio formats"); | |
| 295 return(-1); | |
| 296 } | |
| 297 spec->format = test_format; | |
| 298 | |
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299 if ( SDL_NAME(arts_init)() != 0 ) { |
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300 SDL_SetError("Unable to initialize ARTS"); |
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301 return(-1); |
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302 } |
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303 stream = SDL_NAME(arts_play_stream)(spec->freq, bits, spec->channels, "SDL"); |
| 0 | 304 |
| 305 /* Calculate the final parameters for this audio specification */ | |
| 306 SDL_CalculateAudioSpec(spec); | |
| 307 | |
| 308 /* Determine the power of two of the fragment size */ | |
| 309 for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec ); | |
| 310 if ( (0x01<<frag_spec) != spec->size ) { | |
| 311 SDL_SetError("Fragment size must be a power of two"); | |
| 312 return(-1); | |
| 313 } | |
| 314 frag_spec |= 0x00020000; /* two fragments, for low latency */ | |
| 315 | |
| 316 #ifdef ARTS_P_PACKET_SETTINGS | |
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317 SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SETTINGS, frag_spec); |
| 0 | 318 #else |
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319 SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SIZE, frag_spec&0xffff); |
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320 SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_COUNT, frag_spec>>16); |
| 0 | 321 #endif |
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322 spec->size = SDL_NAME(arts_stream_get)(stream, ARTS_P_PACKET_SIZE); |
| 0 | 323 |
| 324 /* Allocate mixing buffer */ | |
| 325 mixlen = spec->size; | |
| 326 mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); | |
| 327 if ( mixbuf == NULL ) { | |
| 328 return(-1); | |
| 329 } | |
| 330 memset(mixbuf, spec->silence, spec->size); | |
| 331 | |
| 332 /* Get the parent process id (we're the parent of the audio thread) */ | |
| 333 parent = getpid(); | |
| 334 | |
| 335 /* We're ready to rock and roll. :-) */ | |
| 336 return(0); | |
| 337 } |