| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 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 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* Allow access to the audio stream on BeOS */ |
| 25 | |
| 26 | #include <SoundPlayer.h> |
| 27 | |
| 28 | #include "../../main/beos/SDL_BeApp.h" |
| 29 | |
| 30 | extern "C" { |
| 31 | |
| 32 | #include "SDL_audio.h" |
| 33 | #include "../SDL_audio_c.h" |
| 34 | #include "../SDL_sysaudio.h" |
| 35 | #include "../../thread/beos/SDL_systhread_c.h" |
| 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 | { |
| 55 | SDL_free(device->hidden); |
| 56 | SDL_free(device); |
| 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 */ |
| 64 | device = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 65 | if ( device ) { |
| 66 | SDL_memset(device, 0, (sizeof *device)); |
| 67 | device->hidden = (struct SDL_PrivateAudioData *) |
| 68 | SDL_malloc((sizeof *device->hidden)); |
| 69 | } |
| 70 | if ( (device == NULL) || (device->hidden == NULL) ) { |
| 71 | SDL_OutOfMemory(); |
| 72 | if ( device ) { |
| 73 | SDL_free(device); |
| 74 | } |
| 75 | return(0); |
| 76 | } |
| 77 | SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| 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 */ |
| 103 | SDL_memset(stream, audio->spec.silence, len); |
| 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); |
| 116 | SDL_memcpy(stream,audio->convert.buf,audio->convert.len_cvt); |
| 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 | int valid_datatype = 0; |
| 156 | media_raw_audio_format format; |
| 157 | Uint16 test_format = SDL_FirstAudioFormat(spec->format); |
| 158 | |
| 159 | /* Parse the audio format and fill the Be raw audio format */ |
| 160 | memset(&format, '\0', sizeof (media_raw_audio_format)); |
| 161 | format.byte_order = B_MEDIA_LITTLE_ENDIAN; |
| 162 | format.frame_rate = (float) spec->freq; |
| 163 | format.channel_count = spec->channels; /* !!! FIXME: support > 2? */ |
| 164 | while ((!valid_datatype) && (test_format)) { |
| 165 | valid_datatype = 1; |
| 166 | spec->format = test_format; |
| 167 | switch (test_format) { |
| 168 | case AUDIO_S8: |
| 169 | format.format = media_raw_audio_format::B_AUDIO_CHAR; |
| 170 | break; |
| 171 | |
| 172 | case AUDIO_U8: |
| 173 | format.format = media_raw_audio_format::B_AUDIO_UCHAR; |
| 174 | break; |
| 175 | |
| 176 | case AUDIO_S16LSB: |
| 177 | format.format = media_raw_audio_format::B_AUDIO_SHORT; |
| 178 | break; |
| 179 | |
| 180 | case AUDIO_S16MSB: |
| 181 | format.format = media_raw_audio_format::B_AUDIO_SHORT; |
| 182 | format.byte_order = B_MEDIA_BIG_ENDIAN; |
| 183 | break; |
| 184 | |
| 185 | default: |
| 186 | valid_datatype = 0; |
| 187 | test_format = SDL_NextAudioFormat(); |
| 188 | break; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | if (!valid_datatype) { /* shouldn't happen, but just in case... */ |
| 193 | SDL_SetError("Unsupported audio format"); |
| 194 | return (-1); |
| 195 | } |
| 196 | |
| 197 | /* Initialize the Be Application, if it's not already started */ |
| 198 | if (SDL_InitBeApp() < 0) { |
| 199 | return (-1); |
| 200 | } |
| 201 | |
| 202 | format.buffer_size = spec->samples; |
| 203 | |
| 204 | /* Calculate the final parameters for this audio specification */ |
| 205 | SDL_CalculateAudioSpec(spec); |
| 206 | |
| 207 | /* Subscribe to the audio stream (creates a new thread) */ |
| 208 | { sigset_t omask; |
| 209 | SDL_MaskSignals(&omask); |
| 210 | audio_obj = new BSoundPlayer(&format, "SDL Audio", FillSound, |
| 211 | NULL, _this); |
| 212 | SDL_UnmaskSignals(&omask); |
| 213 | } |
| 214 | if ( audio_obj->Start() == B_NO_ERROR ) { |
| 215 | audio_obj->SetHasData(true); |
| 216 | } else { |
| 217 | SDL_SetError("Unable to start Be audio"); |
| 218 | return(-1); |
| 219 | } |
| 220 | |
| 221 | /* We're running! */ |
| 222 | return(1); |
| 223 | } |
| 224 | |
| 225 | }; /* Extern C */ |