Mercurial > sdl-ios-xcode
annotate src/audio/dmedia/SDL_irixaudio.c @ 610:95433459fbd2
Date: Mon, 14 Apr 2003 22:08:27 +0100
From: Patrice Mandin
Subject: [SDL][PATCH] 2 patches for sdl
Here are 2 patches for SDL:
- One is to put the dummy video drivers at the end of the
video drivers list. It gave me problems, when
SDL_VIDEODRIVER is not set, and the dummy driver is used
instead of the platform's driver, just because it is
always available. So the dummy driver must always be at
the end of the list. I suppose picogui and dc video
drivers also don't work.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 15 Apr 2003 15:46:56 +0000 |
| parents | 6399f4e90211 |
| children | 6e6248801043 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 3 Copyright (C) 1997, 1998 Sam Lantinga | |
| 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 | |
| 20 5635-34 Springhouse Dr. | |
| 21 Pleasanton, CA 94588 (USA) | |
|
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Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
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22 slouken@libsdl.org |
| 0 | 23 */ |
| 24 | |
| 25 #ifdef SAVE_RCSID | |
| 26 static char rcsid = | |
| 27 "@(#) $Id$"; | |
| 28 #endif | |
| 29 | |
| 30 /* Allow access to a raw mixing buffer (For IRIX 6.5 and higher) */ | |
| 31 | |
| 32 #include <stdlib.h> | |
| 33 | |
| 34 #include "SDL_endian.h" | |
| 35 #include "SDL_timer.h" | |
| 36 #include "SDL_audio.h" | |
| 37 #include "SDL_audiomem.h" | |
| 38 #include "SDL_audio_c.h" | |
| 39 #include "SDL_irixaudio.h" | |
| 40 | |
| 41 | |
| 42 /* Audio driver functions */ | |
| 43 static int AL_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 44 static void AL_WaitAudio(_THIS); | |
| 45 static void AL_PlayAudio(_THIS); | |
| 46 static Uint8 *AL_GetAudioBuf(_THIS); | |
| 47 static void AL_CloseAudio(_THIS); | |
| 48 | |
| 49 /* Audio driver bootstrap functions */ | |
| 50 | |
| 51 static int Audio_Available(void) | |
| 52 { | |
| 53 return 1; | |
| 54 } | |
| 55 | |
| 56 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 57 { | |
| 58 free(device->hidden); | |
| 59 free(device); | |
| 60 } | |
| 61 | |
| 62 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 63 { | |
| 64 SDL_AudioDevice *this; | |
| 65 | |
| 66 /* Initialize all variables that we clean on shutdown */ | |
| 67 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); | |
| 68 if ( this ) { | |
| 69 memset(this, 0, (sizeof *this)); | |
| 70 this->hidden = (struct SDL_PrivateAudioData *) | |
| 71 malloc((sizeof *this->hidden)); | |
| 72 } | |
| 73 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 74 SDL_OutOfMemory(); | |
| 75 if ( this ) { | |
| 76 free(this); | |
| 77 } | |
| 78 return(0); | |
| 79 } | |
| 80 memset(this->hidden, 0, (sizeof *this->hidden)); | |
| 81 | |
| 82 /* Set the function pointers */ | |
| 83 this->OpenAudio = AL_OpenAudio; | |
| 84 this->WaitAudio = AL_WaitAudio; | |
| 85 this->PlayAudio = AL_PlayAudio; | |
| 86 this->GetAudioBuf = AL_GetAudioBuf; | |
| 87 this->CloseAudio = AL_CloseAudio; | |
| 88 | |
| 89 this->free = Audio_DeleteDevice; | |
| 90 | |
| 91 return this; | |
| 92 } | |
| 93 | |
|
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Audio subsystem no longer assumes sun audio API on UNIX systems
Sam Lantinga <slouken@libsdl.org>
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94 AudioBootStrap DMEDIA_bootstrap = { |
| 0 | 95 "AL", "IRIX DMedia audio", |
| 96 Audio_Available, Audio_CreateDevice | |
| 97 }; | |
| 98 | |
| 99 | |
| 100 void static AL_WaitAudio(_THIS) | |
| 101 { | |
| 102 Sint32 timeleft; | |
| 103 | |
| 104 timeleft = this->spec.samples - alGetFillable(audio_port); | |
| 105 if ( timeleft > 0 ) { | |
| 106 timeleft /= (this->spec.freq/1000); | |
| 107 SDL_Delay((Uint32)timeleft); | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 static void AL_PlayAudio(_THIS) | |
| 112 { | |
| 113 /* Write the audio data out */ | |
| 114 if ( alWriteFrames(audio_port, mixbuf, this->spec.samples) < 0 ) { | |
| 115 /* Assume fatal error, for now */ | |
| 116 this->enabled = 0; | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 static Uint8 *AL_GetAudioBuf(_THIS) | |
| 121 { | |
| 122 return(mixbuf); | |
| 123 } | |
| 124 | |
| 125 static void AL_CloseAudio(_THIS) | |
| 126 { | |
| 127 if ( mixbuf != NULL ) { | |
| 128 SDL_FreeAudioMem(mixbuf); | |
| 129 mixbuf = NULL; | |
| 130 } | |
| 131 if ( audio_port != NULL ) { | |
|
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6399f4e90211
IRIX patches from Andrea Suatoni
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
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132 alClosePort(audio_port); |
| 0 | 133 audio_port = NULL; |
| 134 } | |
| 135 } | |
| 136 | |
| 137 static int AL_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 138 { | |
| 139 ALconfig audio_config; | |
| 140 ALpv audio_param; | |
| 141 int width; | |
| 142 | |
| 143 /* Determine the audio parameters from the AudioSpec */ | |
| 144 switch ( spec->format & 0xFF ) { | |
| 145 | |
| 146 case 8: { /* Signed 8 bit audio data */ | |
| 147 spec->format = AUDIO_S8; | |
| 148 width = AL_SAMPLE_8; | |
| 149 } | |
| 150 break; | |
| 151 | |
| 152 case 16: { /* Signed 16 bit audio data */ | |
| 153 spec->format = AUDIO_S16MSB; | |
| 154 width = AL_SAMPLE_16; | |
| 155 } | |
| 156 break; | |
| 157 | |
| 158 default: { | |
| 159 SDL_SetError("Unsupported audio format"); | |
| 160 return(-1); | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 /* Update the fragment size as size in bytes */ | |
| 165 SDL_CalculateAudioSpec(spec); | |
| 166 | |
| 167 /* Set output frequency */ | |
| 168 audio_param.param = AL_RATE; | |
| 169 audio_param.value.i = spec->freq; | |
| 170 if( alSetParams(AL_DEFAULT_OUTPUT, &audio_param, 1) < 0 ) { | |
| 171 SDL_SetError("alSetParams failed"); | |
| 172 return(-1); | |
| 173 } | |
| 174 | |
| 175 /* Open the audio port with the requested frequency */ | |
| 176 audio_port = NULL; | |
| 177 audio_config = alNewConfig(); | |
| 178 if ( audio_config && | |
| 179 (alSetSampFmt(audio_config, AL_SAMPFMT_TWOSCOMP) >= 0) && | |
| 180 (alSetWidth(audio_config, width) >= 0) && | |
| 181 (alSetQueueSize(audio_config, spec->samples*2) >= 0) && | |
| 182 (alSetChannels(audio_config, spec->channels) >= 0) ) { | |
|
605
6399f4e90211
IRIX patches from Andrea Suatoni
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
183 audio_port = alOpenPort("SDL audio", "w", audio_config); |
| 0 | 184 } |
| 185 alFreeConfig(audio_config); | |
| 186 if( audio_port == NULL ) { | |
| 187 SDL_SetError("Unable to open audio port"); | |
| 188 return(-1); | |
| 189 } | |
| 190 | |
| 191 /* Allocate mixing buffer */ | |
| 192 mixbuf = (Uint8 *)SDL_AllocAudioMem(spec->size); | |
| 193 if ( mixbuf == NULL ) { | |
| 194 SDL_OutOfMemory(); | |
| 195 return(-1); | |
| 196 } | |
| 197 memset(mixbuf, spec->silence, spec->size); | |
| 198 | |
| 199 /* We're ready to rock and roll. :-) */ | |
| 200 return(0); | |
| 201 } |