Mercurial > sdl-ios-xcode
annotate src/audio/baudio/SDL_beaudio.cc @ 756:10332c6fad2e
te: Mon, 15 Dec 2003 08:25:14 -0800 PST
From: "Andrew Bachmann"
Subject: libSDL patches for beos video
I created some patches to SDL:
1. YUV overlay support
2. maintain high refresh rate when changing resolutions to a lower resolution
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 16 Dec 2003 13:04:44 +0000 |
| parents | e8157fcb3114 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 3 Copyright (C) 1997 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 | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
114
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Allow access to the audio stream on BeOS */ | |
| 29 | |
| 30 #include <stdlib.h> | |
| 31 #include <stdio.h> | |
| 32 #include <string.h> | |
| 33 #include <SoundPlayer.h> | |
| 34 | |
| 35 #include "SDL_BeApp.h" | |
| 36 | |
| 37 extern "C" { | |
| 38 | |
| 39 #include "SDL_audio.h" | |
| 40 #include "SDL_audio_c.h" | |
| 41 #include "SDL_sysaudio.h" | |
| 42 #include "SDL_systhread_c.h" | |
| 43 #include "SDL_beaudio.h" | |
| 44 | |
| 45 | |
| 46 /* Audio driver functions */ | |
| 47 static int BE_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 48 static void BE_WaitAudio(_THIS); | |
| 49 static void BE_PlayAudio(_THIS); | |
| 50 static Uint8 *BE_GetAudioBuf(_THIS); | |
| 51 static void BE_CloseAudio(_THIS); | |
| 52 | |
| 53 /* Audio driver bootstrap functions */ | |
| 54 | |
| 55 static int Audio_Available(void) | |
| 56 { | |
| 57 return(1); | |
| 58 } | |
| 59 | |
| 60 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 61 { | |
| 62 free(device->hidden); | |
| 63 free(device); | |
| 64 } | |
| 65 | |
| 66 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 67 { | |
| 68 SDL_AudioDevice *device; | |
| 69 | |
| 70 /* Initialize all variables that we clean on shutdown */ | |
| 71 device = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); | |
| 72 if ( device ) { | |
| 73 memset(device, 0, (sizeof *device)); | |
| 74 device->hidden = (struct SDL_PrivateAudioData *) | |
| 75 malloc((sizeof *device->hidden)); | |
| 76 } | |
| 77 if ( (device == NULL) || (device->hidden == NULL) ) { | |
| 78 SDL_OutOfMemory(); | |
| 79 if ( device ) { | |
| 80 free(device); | |
| 81 } | |
| 82 return(0); | |
| 83 } | |
| 84 memset(device->hidden, 0, (sizeof *device->hidden)); | |
| 85 | |
| 86 /* Set the function pointers */ | |
| 87 device->OpenAudio = BE_OpenAudio; | |
| 88 device->WaitAudio = BE_WaitAudio; | |
| 89 device->PlayAudio = BE_PlayAudio; | |
| 90 device->GetAudioBuf = BE_GetAudioBuf; | |
| 91 device->CloseAudio = BE_CloseAudio; | |
| 92 | |
| 93 device->free = Audio_DeleteDevice; | |
| 94 | |
| 95 return device; | |
| 96 } | |
| 97 | |
| 98 AudioBootStrap BAUDIO_bootstrap = { | |
| 99 "baudio", "BeOS BSoundPlayer", | |
| 100 Audio_Available, Audio_CreateDevice | |
| 101 }; | |
| 102 | |
| 103 /* The BeOS callback for handling the audio buffer */ | |
| 104 static void FillSound(void *device, void *stream, size_t len, | |
| 105 const media_raw_audio_format &format) | |
| 106 { | |
| 107 SDL_AudioDevice *audio = (SDL_AudioDevice *)device; | |
| 108 | |
| 109 /* Silence the buffer, since it's ours */ | |
| 110 memset(stream, audio->spec.silence, len); | |
| 111 | |
| 112 /* Only do soemthing if audio is enabled */ | |
| 113 if ( ! audio->enabled ) | |
| 114 return; | |
| 115 | |
| 116 if ( ! audio->paused ) { | |
| 117 if ( audio->convert.needed ) { | |
| 118 SDL_mutexP(audio->mixer_lock); | |
| 119 (*audio->spec.callback)(audio->spec.userdata, | |
| 120 (Uint8 *)audio->convert.buf,audio->convert.len); | |
| 121 SDL_mutexV(audio->mixer_lock); | |
| 122 SDL_ConvertAudio(&audio->convert); | |
| 123 memcpy(stream,audio->convert.buf,audio->convert.len_cvt); | |
| 124 } else { | |
| 125 SDL_mutexP(audio->mixer_lock); | |
| 126 (*audio->spec.callback)(audio->spec.userdata, | |
| 127 (Uint8 *)stream, len); | |
| 128 SDL_mutexV(audio->mixer_lock); | |
| 129 } | |
| 130 } | |
| 131 return; | |
| 132 } | |
| 133 | |
| 134 /* Dummy functions -- we don't use thread-based audio */ | |
| 135 void BE_WaitAudio(_THIS) | |
| 136 { | |
| 137 return; | |
| 138 } | |
| 139 void BE_PlayAudio(_THIS) | |
| 140 { | |
| 141 return; | |
| 142 } | |
| 143 Uint8 *BE_GetAudioBuf(_THIS) | |
| 144 { | |
| 145 return(NULL); | |
| 146 } | |
| 147 | |
| 148 void BE_CloseAudio(_THIS) | |
| 149 { | |
| 150 if ( audio_obj ) { | |
| 151 audio_obj->Stop(); | |
| 152 delete audio_obj; | |
| 153 audio_obj = NULL; | |
| 154 } | |
| 155 | |
| 156 /* Quit the Be Application, if there's nothing left to do */ | |
| 157 SDL_QuitBeApp(); | |
| 158 } | |
| 159 | |
| 160 int BE_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 161 { | |
| 162 media_raw_audio_format format; | |
| 163 | |
| 164 /* Initialize the Be Application, if it's not already started */ | |
| 165 if ( SDL_InitBeApp() < 0 ) { | |
| 166 return(-1); | |
| 167 } | |
| 168 | |
| 169 /* Parse the audio format and fill the Be raw audio format */ | |
| 170 format.frame_rate = (float)spec->freq; | |
| 171 format.channel_count = spec->channels; | |
| 172 switch (spec->format&~0x1000) { | |
| 173 case AUDIO_S8: | |
| 174 /* Signed 8-bit audio unsupported, convert to U8 */ | |
| 175 spec->format = AUDIO_U8; | |
| 176 case AUDIO_U8: | |
| 177 format.format = media_raw_audio_format::B_AUDIO_UCHAR; | |
| 178 format.byte_order = 0; | |
| 179 break; | |
| 180 case AUDIO_U16: | |
| 181 /* Unsigned 16-bit audio unsupported, convert to S16 */ | |
| 182 spec->format ^= 0x8000; | |
| 183 case AUDIO_S16: | |
| 184 format.format = media_raw_audio_format::B_AUDIO_SHORT; | |
| 185 if ( spec->format & 0x1000 ) { | |
| 186 format.byte_order = 1; /* Big endian */ | |
| 187 } else { | |
| 188 format.byte_order = 2; /* Little endian */ | |
| 189 } | |
| 190 break; | |
| 191 } | |
| 192 format.buffer_size = spec->samples; | |
| 193 | |
| 194 /* Calculate the final parameters for this audio specification */ | |
| 195 SDL_CalculateAudioSpec(spec); | |
| 196 | |
| 197 /* Subscribe to the audio stream (creates a new thread) */ | |
| 198 { sigset_t omask; | |
| 199 SDL_MaskSignals(&omask); | |
| 200 audio_obj = new BSoundPlayer(&format, "SDL Audio", FillSound, | |
| 201 NULL, _this); | |
| 202 SDL_UnmaskSignals(&omask); | |
| 203 } | |
|
114
dabc453ce7f7
Now returns an error if unable to open audio on BeOS
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
204 if ( audio_obj->Start() == B_NO_ERROR ) { |
|
dabc453ce7f7
Now returns an error if unable to open audio on BeOS
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
205 audio_obj->SetHasData(true); |
|
dabc453ce7f7
Now returns an error if unable to open audio on BeOS
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
206 } else { |
|
dabc453ce7f7
Now returns an error if unable to open audio on BeOS
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
207 SDL_SetError("Unable to start Be audio"); |
|
dabc453ce7f7
Now returns an error if unable to open audio on BeOS
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
208 return(-1); |
|
dabc453ce7f7
Now returns an error if unable to open audio on BeOS
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
209 } |
| 0 | 210 |
| 211 /* We're running! */ | |
| 212 return(1); | |
| 213 } | |
| 214 | |
| 215 }; /* Extern C */ |