Mercurial > sdl-ios-xcode
annotate src/audio/baudio/SDL_beaudio.cc @ 1534:f02e673ffc5f
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 14 Mar 2006 16:20:28 +0000 |
| parents | 376665398b25 |
| 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 the audio stream on BeOS */ | |
| 25 | |
| 26 #include <SoundPlayer.h> | |
| 27 | |
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28 #include "../../main/beos/SDL_BeApp.h" |
| 0 | 29 |
| 30 extern "C" { | |
| 31 | |
| 32 #include "SDL_audio.h" | |
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33 #include "../SDL_audio_c.h" |
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34 #include "../SDL_sysaudio.h" |
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35 #include "../../thread/beos/SDL_systhread_c.h" |
| 0 | 36 #include "SDL_beaudio.h" |
| 37 | |
| 38 | |
| 39 /* Audio driver functions */ | |
| 40 static int BE_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 41 static void BE_WaitAudio(_THIS); | |
| 42 static void BE_PlayAudio(_THIS); | |
| 43 static Uint8 *BE_GetAudioBuf(_THIS); | |
| 44 static void BE_CloseAudio(_THIS); | |
| 45 | |
| 46 /* Audio driver bootstrap functions */ | |
| 47 | |
| 48 static int Audio_Available(void) | |
| 49 { | |
| 50 return(1); | |
| 51 } | |
| 52 | |
| 53 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 54 { | |
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55 SDL_free(device->hidden); |
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56 SDL_free(device); |
| 0 | 57 } |
| 58 | |
| 59 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 60 { | |
| 61 SDL_AudioDevice *device; | |
| 62 | |
| 63 /* Initialize all variables that we clean on shutdown */ | |
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64 device = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 65 if ( device ) { |
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66 SDL_memset(device, 0, (sizeof *device)); |
| 0 | 67 device->hidden = (struct SDL_PrivateAudioData *) |
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68 SDL_malloc((sizeof *device->hidden)); |
| 0 | 69 } |
| 70 if ( (device == NULL) || (device->hidden == NULL) ) { | |
| 71 SDL_OutOfMemory(); | |
| 72 if ( device ) { | |
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73 SDL_free(device); |
| 0 | 74 } |
| 75 return(0); | |
| 76 } | |
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77 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| 0 | 78 |
| 79 /* Set the function pointers */ | |
| 80 device->OpenAudio = BE_OpenAudio; | |
| 81 device->WaitAudio = BE_WaitAudio; | |
| 82 device->PlayAudio = BE_PlayAudio; | |
| 83 device->GetAudioBuf = BE_GetAudioBuf; | |
| 84 device->CloseAudio = BE_CloseAudio; | |
| 85 | |
| 86 device->free = Audio_DeleteDevice; | |
| 87 | |
| 88 return device; | |
| 89 } | |
| 90 | |
| 91 AudioBootStrap BAUDIO_bootstrap = { | |
| 92 "baudio", "BeOS BSoundPlayer", | |
| 93 Audio_Available, Audio_CreateDevice | |
| 94 }; | |
| 95 | |
| 96 /* The BeOS callback for handling the audio buffer */ | |
| 97 static void FillSound(void *device, void *stream, size_t len, | |
| 98 const media_raw_audio_format &format) | |
| 99 { | |
| 100 SDL_AudioDevice *audio = (SDL_AudioDevice *)device; | |
| 101 | |
| 102 /* Silence the buffer, since it's ours */ | |
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103 SDL_memset(stream, audio->spec.silence, len); |
| 0 | 104 |
| 105 /* Only do soemthing if audio is enabled */ | |
| 106 if ( ! audio->enabled ) | |
| 107 return; | |
| 108 | |
| 109 if ( ! audio->paused ) { | |
| 110 if ( audio->convert.needed ) { | |
| 111 SDL_mutexP(audio->mixer_lock); | |
| 112 (*audio->spec.callback)(audio->spec.userdata, | |
| 113 (Uint8 *)audio->convert.buf,audio->convert.len); | |
| 114 SDL_mutexV(audio->mixer_lock); | |
| 115 SDL_ConvertAudio(&audio->convert); | |
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116 SDL_memcpy(stream,audio->convert.buf,audio->convert.len_cvt); |
| 0 | 117 } else { |
| 118 SDL_mutexP(audio->mixer_lock); | |
| 119 (*audio->spec.callback)(audio->spec.userdata, | |
| 120 (Uint8 *)stream, len); | |
| 121 SDL_mutexV(audio->mixer_lock); | |
| 122 } | |
| 123 } | |
| 124 return; | |
| 125 } | |
| 126 | |
| 127 /* Dummy functions -- we don't use thread-based audio */ | |
| 128 void BE_WaitAudio(_THIS) | |
| 129 { | |
| 130 return; | |
| 131 } | |
| 132 void BE_PlayAudio(_THIS) | |
| 133 { | |
| 134 return; | |
| 135 } | |
| 136 Uint8 *BE_GetAudioBuf(_THIS) | |
| 137 { | |
| 138 return(NULL); | |
| 139 } | |
| 140 | |
| 141 void BE_CloseAudio(_THIS) | |
| 142 { | |
| 143 if ( audio_obj ) { | |
| 144 audio_obj->Stop(); | |
| 145 delete audio_obj; | |
| 146 audio_obj = NULL; | |
| 147 } | |
| 148 | |
| 149 /* Quit the Be Application, if there's nothing left to do */ | |
| 150 SDL_QuitBeApp(); | |
| 151 } | |
| 152 | |
| 153 int BE_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 154 { | |
| 155 media_raw_audio_format format; | |
| 156 | |
| 157 /* Initialize the Be Application, if it's not already started */ | |
| 158 if ( SDL_InitBeApp() < 0 ) { | |
| 159 return(-1); | |
| 160 } | |
| 161 | |
| 162 /* Parse the audio format and fill the Be raw audio format */ | |
| 163 format.frame_rate = (float)spec->freq; | |
| 164 format.channel_count = spec->channels; | |
| 165 switch (spec->format&~0x1000) { | |
| 166 case AUDIO_S8: | |
| 167 /* Signed 8-bit audio unsupported, convert to U8 */ | |
| 168 spec->format = AUDIO_U8; | |
| 169 case AUDIO_U8: | |
| 170 format.format = media_raw_audio_format::B_AUDIO_UCHAR; | |
| 171 format.byte_order = 0; | |
| 172 break; | |
| 173 case AUDIO_U16: | |
| 174 /* Unsigned 16-bit audio unsupported, convert to S16 */ | |
| 175 spec->format ^= 0x8000; | |
| 176 case AUDIO_S16: | |
| 177 format.format = media_raw_audio_format::B_AUDIO_SHORT; | |
| 178 if ( spec->format & 0x1000 ) { | |
| 179 format.byte_order = 1; /* Big endian */ | |
| 180 } else { | |
| 181 format.byte_order = 2; /* Little endian */ | |
| 182 } | |
| 183 break; | |
| 184 } | |
| 185 format.buffer_size = spec->samples; | |
| 186 | |
| 187 /* Calculate the final parameters for this audio specification */ | |
| 188 SDL_CalculateAudioSpec(spec); | |
| 189 | |
| 190 /* Subscribe to the audio stream (creates a new thread) */ | |
| 191 { sigset_t omask; | |
| 192 SDL_MaskSignals(&omask); | |
| 193 audio_obj = new BSoundPlayer(&format, "SDL Audio", FillSound, | |
| 194 NULL, _this); | |
| 195 SDL_UnmaskSignals(&omask); | |
| 196 } | |
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197 if ( audio_obj->Start() == B_NO_ERROR ) { |
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198 audio_obj->SetHasData(true); |
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199 } else { |
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200 SDL_SetError("Unable to start Be audio"); |
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201 return(-1); |
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202 } |
| 0 | 203 |
| 204 /* We're running! */ | |
| 205 return(1); | |
| 206 } | |
| 207 | |
| 208 }; /* Extern C */ |