Mercurial > sdl-ios-xcode
annotate src/audio/dmedia/SDL_irixaudio.c @ 1621:f12379c41042
Fixes bug #195:
The proper name of Apple's operating system is "Mac OS X" not "MacOS X", as can
bee seen in many places, for example http://www.apple.com/macosx/). This
contrasts the naming of the old operating system, which was called "MacOS" and
today is often refered to as "MacOS Classic".
The attached patches fixes the misuse of the name "MacOS X" in both the SDL12
and sdlweb CVS modules.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 13 Apr 2006 13:08:26 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb 405a192b68e7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* Allow access to a raw mixing buffer (For IRIX 6.5 and higher) */ | |
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25 /* patch for IRIX 5 by Georg Schwarz 18/07/2004 */ |
| 0 | 26 |
| 27 #include "SDL_timer.h" | |
| 28 #include "SDL_audio.h" | |
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29 #include "../SDL_audiomem.h" |
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30 #include "../SDL_audio_c.h" |
| 0 | 31 #include "SDL_irixaudio.h" |
| 32 | |
| 33 | |
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34 #ifndef AL_RESOURCE /* as a test whether we use the old IRIX audio libraries */ |
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35 #define OLD_IRIX_AUDIO |
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36 #define alClosePort(x) ALcloseport(x) |
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37 #define alFreeConfig(x) ALfreeconfig(x) |
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38 #define alGetFillable(x) ALgetfillable(x) |
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39 #define alNewConfig() ALnewconfig() |
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40 #define alOpenPort(x,y,z) ALopenport(x,y,z) |
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41 #define alSetChannels(x,y) ALsetchannels(x,y) |
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42 #define alSetQueueSize(x,y) ALsetqueuesize(x,y) |
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43 #define alSetSampFmt(x,y) ALsetsampfmt(x,y) |
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44 #define alSetWidth(x,y) ALsetwidth(x,y) |
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45 #endif |
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46 |
| 0 | 47 /* Audio driver functions */ |
| 48 static int AL_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 49 static void AL_WaitAudio(_THIS); | |
| 50 static void AL_PlayAudio(_THIS); | |
| 51 static Uint8 *AL_GetAudioBuf(_THIS); | |
| 52 static void AL_CloseAudio(_THIS); | |
| 53 | |
| 54 /* Audio driver bootstrap functions */ | |
| 55 | |
| 56 static int Audio_Available(void) | |
| 57 { | |
| 58 return 1; | |
| 59 } | |
| 60 | |
| 61 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 62 { | |
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63 SDL_free(device->hidden); |
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64 SDL_free(device); |
| 0 | 65 } |
| 66 | |
| 67 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 68 { | |
| 69 SDL_AudioDevice *this; | |
| 70 | |
| 71 /* Initialize all variables that we clean on shutdown */ | |
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72 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 73 if ( this ) { |
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74 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 75 this->hidden = (struct SDL_PrivateAudioData *) |
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76 SDL_malloc((sizeof *this->hidden)); |
| 0 | 77 } |
| 78 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 79 SDL_OutOfMemory(); | |
| 80 if ( this ) { | |
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81 SDL_free(this); |
| 0 | 82 } |
| 83 return(0); | |
| 84 } | |
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85 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 86 |
| 87 /* Set the function pointers */ | |
| 88 this->OpenAudio = AL_OpenAudio; | |
| 89 this->WaitAudio = AL_WaitAudio; | |
| 90 this->PlayAudio = AL_PlayAudio; | |
| 91 this->GetAudioBuf = AL_GetAudioBuf; | |
| 92 this->CloseAudio = AL_CloseAudio; | |
| 93 | |
| 94 this->free = Audio_DeleteDevice; | |
| 95 | |
| 96 return this; | |
| 97 } | |
| 98 | |
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99 AudioBootStrap DMEDIA_bootstrap = { |
| 0 | 100 "AL", "IRIX DMedia audio", |
| 101 Audio_Available, Audio_CreateDevice | |
| 102 }; | |
| 103 | |
| 104 | |
| 105 void static AL_WaitAudio(_THIS) | |
| 106 { | |
| 107 Sint32 timeleft; | |
| 108 | |
| 109 timeleft = this->spec.samples - alGetFillable(audio_port); | |
| 110 if ( timeleft > 0 ) { | |
| 111 timeleft /= (this->spec.freq/1000); | |
| 112 SDL_Delay((Uint32)timeleft); | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 static void AL_PlayAudio(_THIS) | |
| 117 { | |
| 118 /* Write the audio data out */ | |
| 119 if ( alWriteFrames(audio_port, mixbuf, this->spec.samples) < 0 ) { | |
| 120 /* Assume fatal error, for now */ | |
| 121 this->enabled = 0; | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 static Uint8 *AL_GetAudioBuf(_THIS) | |
| 126 { | |
| 127 return(mixbuf); | |
| 128 } | |
| 129 | |
| 130 static void AL_CloseAudio(_THIS) | |
| 131 { | |
| 132 if ( mixbuf != NULL ) { | |
| 133 SDL_FreeAudioMem(mixbuf); | |
| 134 mixbuf = NULL; | |
| 135 } | |
| 136 if ( audio_port != NULL ) { | |
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137 alClosePort(audio_port); |
| 0 | 138 audio_port = NULL; |
| 139 } | |
| 140 } | |
| 141 | |
| 142 static int AL_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 143 { | |
| 144 ALconfig audio_config; | |
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145 #ifdef OLD_IRIX_AUDIO |
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146 long audio_param[2]; |
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147 #else |
| 0 | 148 ALpv audio_param; |
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149 #endif |
| 0 | 150 int width; |
| 151 | |
| 152 /* Determine the audio parameters from the AudioSpec */ | |
| 153 switch ( spec->format & 0xFF ) { | |
| 154 | |
| 155 case 8: { /* Signed 8 bit audio data */ | |
| 156 spec->format = AUDIO_S8; | |
| 157 width = AL_SAMPLE_8; | |
| 158 } | |
| 159 break; | |
| 160 | |
| 161 case 16: { /* Signed 16 bit audio data */ | |
| 162 spec->format = AUDIO_S16MSB; | |
| 163 width = AL_SAMPLE_16; | |
| 164 } | |
| 165 break; | |
| 166 | |
| 167 default: { | |
| 168 SDL_SetError("Unsupported audio format"); | |
| 169 return(-1); | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 /* Update the fragment size as size in bytes */ | |
| 174 SDL_CalculateAudioSpec(spec); | |
| 175 | |
| 176 /* Set output frequency */ | |
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177 #ifdef OLD_IRIX_AUDIO |
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178 audio_param[0] = AL_OUTPUT_RATE; |
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179 audio_param[1] = spec->freq; |
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180 if( ALsetparams(AL_DEFAULT_DEVICE, audio_param, 2) < 0 ) { |
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181 #else |
| 0 | 182 audio_param.param = AL_RATE; |
| 183 audio_param.value.i = spec->freq; | |
| 184 if( alSetParams(AL_DEFAULT_OUTPUT, &audio_param, 1) < 0 ) { | |
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185 #endif |
| 0 | 186 SDL_SetError("alSetParams failed"); |
| 187 return(-1); | |
| 188 } | |
| 189 | |
| 190 /* Open the audio port with the requested frequency */ | |
| 191 audio_port = NULL; | |
| 192 audio_config = alNewConfig(); | |
| 193 if ( audio_config && | |
| 194 (alSetSampFmt(audio_config, AL_SAMPFMT_TWOSCOMP) >= 0) && | |
| 195 (alSetWidth(audio_config, width) >= 0) && | |
| 196 (alSetQueueSize(audio_config, spec->samples*2) >= 0) && | |
| 197 (alSetChannels(audio_config, spec->channels) >= 0) ) { | |
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198 audio_port = alOpenPort("SDL audio", "w", audio_config); |
| 0 | 199 } |
| 200 alFreeConfig(audio_config); | |
| 201 if( audio_port == NULL ) { | |
| 202 SDL_SetError("Unable to open audio port"); | |
| 203 return(-1); | |
| 204 } | |
| 205 | |
| 206 /* Allocate mixing buffer */ | |
| 207 mixbuf = (Uint8 *)SDL_AllocAudioMem(spec->size); | |
| 208 if ( mixbuf == NULL ) { | |
| 209 SDL_OutOfMemory(); | |
| 210 return(-1); | |
| 211 } | |
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212 SDL_memset(mixbuf, spec->silence, spec->size); |
| 0 | 213 |
| 214 /* We're ready to rock and roll. :-) */ | |
| 215 return(0); | |
| 216 } |