Atlas - SDL_haikuaudio.cc
Home / ext / SDL2 / src / audio / haiku Lines: 1 | Size: 7255 bytes [Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)][FILE BEGIN]1/* 2 Simple DirectMedia Layer 3 Copyright (C) 1997-2018 Sam Lantinga <[email protected]> 4 5 This software is provided 'as-is', without any express or implied 6 warranty. In no event will the authors be held liable for any damages 7 arising from the use of this software. 8 9 Permission is granted to anyone to use this software for any purpose, 10 including commercial applications, and to alter it and redistribute it 11 freely, subject to the following restrictions: 12 13 1. The origin of this software must not be misrepresented; you must not 14 claim that you wrote the original software. If you use this software 15 in a product, an acknowledgment in the product documentation would be 16 appreciated but is not required. 17 2. Altered source versions must be plainly marked as such, and must not be 18 misrepresented as being the original software. 19 3. This notice may not be removed or altered from any source distribution. 20*/ 21#include "../../SDL_internal.h" 22 23#if SDL_AUDIO_DRIVER_HAIKU 24 25/* Allow access to the audio stream on Haiku */ 26 27#include <SoundPlayer.h> 28#include <signal.h> 29 30#include "../../main/haiku/SDL_BeApp.h" 31 32extern "C" 33{ 34 35#include "SDL_audio.h" 36#include "../SDL_audio_c.h" 37#include "../SDL_sysaudio.h" 38#include "SDL_haikuaudio.h" 39#include "SDL_assert.h" 40 41} 42 43 44/* !!! FIXME: have the callback call the higher level to avoid code dupe. */ 45/* The Haiku callback for handling the audio buffer */ 46static void 47FillSound(void *device, void *stream, size_t len, 48 const media_raw_audio_format & format) 49{ 50 SDL_AudioDevice *audio = (SDL_AudioDevice *) device; 51 SDL_AudioCallback callback = audio->callbackspec.callback; 52 53 /* Only do something if audio is enabled */ 54 if (!SDL_AtomicGet(&audio->enabled) || SDL_AtomicGet(&audio->paused)) { 55 if (audio->stream) { 56 SDL_AudioStreamClear(audio->stream); 57 } 58 SDL_memset(stream, audio->spec.silence, len); 59 return; 60 } 61 62 SDL_assert(audio->spec.size == len); 63 64 if (audio->stream == NULL) { /* no conversion necessary. */ 65 SDL_LockMutex(audio->mixer_lock); 66 callback(audio->callbackspec.userdata, (Uint8 *) stream, len); 67 SDL_UnlockMutex(audio->mixer_lock); 68 } else { /* streaming/converting */ 69 const int stream_len = audio->callbackspec.size; 70 const int ilen = (int) len; 71 while (SDL_AudioStreamAvailable(audio->stream) < ilen) { 72 callback(audio->callbackspec.userdata, audio->work_buffer, stream_len); 73 if (SDL_AudioStreamPut(audio->stream, audio->work_buffer, stream_len) == -1) { 74 SDL_AudioStreamClear(audio->stream); 75 SDL_AtomicSet(&audio->enabled, 0); 76 break; 77 } 78 } 79 80 const int got = SDL_AudioStreamGet(audio->stream, stream, ilen); 81 SDL_assert((got < 0) || (got == ilen)); 82 if (got != ilen) { 83 SDL_memset(stream, audio->spec.silence, len); 84 } 85 } 86} 87 88static void 89HAIKUAUDIO_CloseDevice(_THIS) 90{ 91 if (_this->hidden->audio_obj) { 92 _this->hidden->audio_obj->Stop(); 93 delete _this->hidden->audio_obj; 94 } 95 delete _this->hidden; 96} 97 98 99static const int sig_list[] = { 100 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGWINCH, 0 101}; 102 103static inline void 104MaskSignals(sigset_t * omask) 105{ 106 sigset_t mask; 107 int i; 108 109 sigemptyset(&mask); 110 for (i = 0; sig_list[i]; ++i) { 111 sigaddset(&mask, sig_list[i]); 112 } 113 sigprocmask(SIG_BLOCK, &mask, omask); 114} 115 116static inline void 117UnmaskSignals(sigset_t * omask) 118{ 119 sigprocmask(SIG_SETMASK, omask, NULL); 120} 121 122 123static int 124HAIKUAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) 125{ 126 int valid_datatype = 0; 127 media_raw_audio_format format; 128 SDL_AudioFormat test_format = SDL_FirstAudioFormat(_this->spec.format); 129 130 /* Initialize all variables that we clean on shutdown */ 131 _this->hidden = new SDL_PrivateAudioData; 132 if (_this->hidden == NULL) { 133 return SDL_OutOfMemory(); 134 } 135 SDL_zerop(_this->hidden); 136 137 /* Parse the audio format and fill the Be raw audio format */ 138 SDL_zero(format); 139 format.byte_order = B_MEDIA_LITTLE_ENDIAN; 140 format.frame_rate = (float) _this->spec.freq; 141 format.channel_count = _this->spec.channels; /* !!! FIXME: support > 2? */ 142 while ((!valid_datatype) && (test_format)) { 143 valid_datatype = 1; 144 _this->spec.format = test_format; 145 switch (test_format) { 146 case AUDIO_S8: 147 format.format = media_raw_audio_format::B_AUDIO_CHAR; 148 break; 149 150 case AUDIO_U8: 151 format.format = media_raw_audio_format::B_AUDIO_UCHAR; 152 break; 153 154 case AUDIO_S16LSB: 155 format.format = media_raw_audio_format::B_AUDIO_SHORT; 156 break; 157 158 case AUDIO_S16MSB: 159 format.format = media_raw_audio_format::B_AUDIO_SHORT; 160 format.byte_order = B_MEDIA_BIG_ENDIAN; 161 break; 162 163 case AUDIO_S32LSB: 164 format.format = media_raw_audio_format::B_AUDIO_INT; 165 break; 166 167 case AUDIO_S32MSB: 168 format.format = media_raw_audio_format::B_AUDIO_INT; 169 format.byte_order = B_MEDIA_BIG_ENDIAN; 170 break; 171 172 case AUDIO_F32LSB: 173 format.format = media_raw_audio_format::B_AUDIO_FLOAT; 174 break; 175 176 case AUDIO_F32MSB: 177 format.format = media_raw_audio_format::B_AUDIO_FLOAT; 178 format.byte_order = B_MEDIA_BIG_ENDIAN; 179 break; 180 181 default: 182 valid_datatype = 0; 183 test_format = SDL_NextAudioFormat(); 184 break; 185 } 186 } 187 188 if (!valid_datatype) { /* shouldn't happen, but just in case... */ 189 return SDL_SetError("Unsupported audio format"); 190 } 191 192 /* Calculate the final parameters for this audio specification */ 193 SDL_CalculateAudioSpec(&_this->spec); 194 195 format.buffer_size = _this->spec.size; 196 197 /* Subscribe to the audio stream (creates a new thread) */ 198 sigset_t omask; 199 MaskSignals(&omask); 200 _this->hidden->audio_obj = new BSoundPlayer(&format, "SDL Audio", 201 FillSound, NULL, _this); 202 UnmaskSignals(&omask); 203 204 if (_this->hidden->audio_obj->Start() == B_NO_ERROR) { 205 _this->hidden->audio_obj->SetHasData(true); 206 } else { 207 return SDL_SetError("Unable to start Be audio"); 208 } 209 210 /* We're running! */ 211 return 0; 212} 213 214static void 215HAIKUAUDIO_Deinitialize(void) 216{ 217 SDL_QuitBeApp(); 218} 219 220static int 221HAIKUAUDIO_Init(SDL_AudioDriverImpl * impl) 222{ 223 /* Initialize the Be Application, if it's not already started */ 224 if (SDL_InitBeApp() < 0) { 225 return 0; 226 } 227 228 /* Set the function pointers */ 229 impl->OpenDevice = HAIKUAUDIO_OpenDevice; 230 impl->CloseDevice = HAIKUAUDIO_CloseDevice; 231 impl->Deinitialize = HAIKUAUDIO_Deinitialize; 232 impl->ProvidesOwnCallbackThread = 1; 233 impl->OnlyHasDefaultOutputDevice = 1; 234 235 return 1; /* this audio target is available. */ 236} 237 238extern "C" 239{ 240 extern AudioBootStrap HAIKUAUDIO_bootstrap; 241} 242AudioBootStrap HAIKUAUDIO_bootstrap = { 243 "haiku", "Haiku BSoundPlayer", HAIKUAUDIO_Init, 0 244}; 245 246#endif /* SDL_AUDIO_DRIVER_HAIKU */ 247 248/* vi: set ts=4 sw=4 expandtab: */ 249[FILE END](C) 2025 0x4248 (C) 2025 4248 Media and 4248 Systems, All part of 0x4248 See LICENCE files for more information. 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