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Commit | Line | Data |
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85571bc7 | 1 | /* |
1d14ffa9 FB |
2 | * QEMU SDL audio driver |
3 | * | |
4 | * Copyright (c) 2004-2005 Vassili Karpov (malc) | |
5 | * | |
85571bc7 FB |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
9f059eca FB |
24 | #include <SDL.h> |
25 | #include <SDL_thread.h> | |
87ecb68b PB |
26 | #include "qemu-common.h" |
27 | #include "audio.h" | |
85571bc7 | 28 | |
e784ba70 TS |
29 | #ifndef _WIN32 |
30 | #ifdef __sun__ | |
31 | #define _POSIX_PTHREAD_SEMANTICS 1 | |
c5e97233 | 32 | #elif defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) |
9b4c14c3 | 33 | #include <pthread.h> |
e784ba70 TS |
34 | #endif |
35 | #include <signal.h> | |
36 | #endif | |
37 | ||
1d14ffa9 FB |
38 | #define AUDIO_CAP "sdl" |
39 | #include "audio_int.h" | |
85571bc7 | 40 | |
1d14ffa9 FB |
41 | typedef struct SDLVoiceOut { |
42 | HWVoiceOut hw; | |
43 | int live; | |
1d14ffa9 | 44 | int decr; |
4839abe7 | 45 | int pending; |
1d14ffa9 | 46 | } SDLVoiceOut; |
85571bc7 FB |
47 | |
48 | static struct { | |
49 | int nb_samples; | |
50 | } conf = { | |
1a40d5e2 | 51 | .nb_samples = 1024 |
85571bc7 FB |
52 | }; |
53 | ||
b1d8e52e | 54 | static struct SDLAudioState { |
85571bc7 FB |
55 | int exit; |
56 | SDL_mutex *mutex; | |
57 | SDL_sem *sem; | |
58 | int initialized; | |
59 | } glob_sdl; | |
60 | typedef struct SDLAudioState SDLAudioState; | |
61 | ||
1d14ffa9 | 62 | static void GCC_FMT_ATTR (1, 2) sdl_logerr (const char *fmt, ...) |
85571bc7 | 63 | { |
1d14ffa9 FB |
64 | va_list ap; |
65 | ||
66 | va_start (ap, fmt); | |
67 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
68 | va_end (ap); | |
69 | ||
70 | AUD_log (AUDIO_CAP, "Reason: %s\n", SDL_GetError ()); | |
85571bc7 FB |
71 | } |
72 | ||
1d14ffa9 | 73 | static int sdl_lock (SDLAudioState *s, const char *forfn) |
85571bc7 FB |
74 | { |
75 | if (SDL_LockMutex (s->mutex)) { | |
1d14ffa9 | 76 | sdl_logerr ("SDL_LockMutex for %s failed\n", forfn); |
85571bc7 FB |
77 | return -1; |
78 | } | |
79 | return 0; | |
80 | } | |
81 | ||
1d14ffa9 | 82 | static int sdl_unlock (SDLAudioState *s, const char *forfn) |
85571bc7 FB |
83 | { |
84 | if (SDL_UnlockMutex (s->mutex)) { | |
1d14ffa9 | 85 | sdl_logerr ("SDL_UnlockMutex for %s failed\n", forfn); |
85571bc7 FB |
86 | return -1; |
87 | } | |
88 | return 0; | |
89 | } | |
90 | ||
1d14ffa9 | 91 | static int sdl_post (SDLAudioState *s, const char *forfn) |
85571bc7 FB |
92 | { |
93 | if (SDL_SemPost (s->sem)) { | |
1d14ffa9 | 94 | sdl_logerr ("SDL_SemPost for %s failed\n", forfn); |
85571bc7 FB |
95 | return -1; |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
1d14ffa9 | 100 | static int sdl_wait (SDLAudioState *s, const char *forfn) |
85571bc7 FB |
101 | { |
102 | if (SDL_SemWait (s->sem)) { | |
1d14ffa9 | 103 | sdl_logerr ("SDL_SemWait for %s failed\n", forfn); |
85571bc7 FB |
104 | return -1; |
105 | } | |
106 | return 0; | |
107 | } | |
108 | ||
1d14ffa9 | 109 | static int sdl_unlock_and_post (SDLAudioState *s, const char *forfn) |
85571bc7 | 110 | { |
1d14ffa9 | 111 | if (sdl_unlock (s, forfn)) { |
85571bc7 | 112 | return -1; |
1d14ffa9 | 113 | } |
85571bc7 | 114 | |
1d14ffa9 | 115 | return sdl_post (s, forfn); |
85571bc7 FB |
116 | } |
117 | ||
1d14ffa9 | 118 | static int aud_to_sdlfmt (audfmt_e fmt, int *shift) |
85571bc7 | 119 | { |
85571bc7 | 120 | switch (fmt) { |
1d14ffa9 FB |
121 | case AUD_FMT_S8: |
122 | *shift = 0; | |
123 | return AUDIO_S8; | |
124 | ||
125 | case AUD_FMT_U8: | |
126 | *shift = 0; | |
127 | return AUDIO_U8; | |
128 | ||
129 | case AUD_FMT_S16: | |
130 | *shift = 1; | |
131 | return AUDIO_S16LSB; | |
132 | ||
133 | case AUD_FMT_U16: | |
134 | *shift = 1; | |
135 | return AUDIO_U16LSB; | |
136 | ||
85571bc7 | 137 | default: |
1d14ffa9 FB |
138 | dolog ("Internal logic error: Bad audio format %d\n", fmt); |
139 | #ifdef DEBUG_AUDIO | |
140 | abort (); | |
141 | #endif | |
142 | return AUDIO_U8; | |
85571bc7 FB |
143 | } |
144 | } | |
145 | ||
1d14ffa9 | 146 | static int sdl_to_audfmt (int sdlfmt, audfmt_e *fmt, int *endianess) |
85571bc7 | 147 | { |
1d14ffa9 FB |
148 | switch (sdlfmt) { |
149 | case AUDIO_S8: | |
150 | *endianess = 0; | |
151 | *fmt = AUD_FMT_S8; | |
152 | break; | |
153 | ||
154 | case AUDIO_U8: | |
155 | *endianess = 0; | |
156 | *fmt = AUD_FMT_U8; | |
157 | break; | |
158 | ||
159 | case AUDIO_S16LSB: | |
160 | *endianess = 0; | |
161 | *fmt = AUD_FMT_S16; | |
162 | break; | |
163 | ||
164 | case AUDIO_U16LSB: | |
165 | *endianess = 0; | |
166 | *fmt = AUD_FMT_U16; | |
167 | break; | |
168 | ||
169 | case AUDIO_S16MSB: | |
170 | *endianess = 1; | |
171 | *fmt = AUD_FMT_S16; | |
172 | break; | |
173 | ||
174 | case AUDIO_U16MSB: | |
175 | *endianess = 1; | |
176 | *fmt = AUD_FMT_U16; | |
177 | break; | |
178 | ||
85571bc7 | 179 | default: |
1d14ffa9 FB |
180 | dolog ("Unrecognized SDL audio format %d\n", sdlfmt); |
181 | return -1; | |
85571bc7 | 182 | } |
1d14ffa9 FB |
183 | |
184 | return 0; | |
85571bc7 FB |
185 | } |
186 | ||
187 | static int sdl_open (SDL_AudioSpec *req, SDL_AudioSpec *obt) | |
188 | { | |
189 | int status; | |
e784ba70 TS |
190 | #ifndef _WIN32 |
191 | sigset_t new, old; | |
192 | ||
193 | /* Make sure potential threads created by SDL don't hog signals. */ | |
194 | sigfillset (&new); | |
195 | pthread_sigmask (SIG_BLOCK, &new, &old); | |
196 | #endif | |
85571bc7 FB |
197 | |
198 | status = SDL_OpenAudio (req, obt); | |
199 | if (status) { | |
1d14ffa9 | 200 | sdl_logerr ("SDL_OpenAudio failed\n"); |
85571bc7 | 201 | } |
e784ba70 TS |
202 | |
203 | #ifndef _WIN32 | |
660f11be | 204 | pthread_sigmask (SIG_SETMASK, &old, NULL); |
e784ba70 | 205 | #endif |
85571bc7 FB |
206 | return status; |
207 | } | |
208 | ||
209 | static void sdl_close (SDLAudioState *s) | |
210 | { | |
211 | if (s->initialized) { | |
1d14ffa9 | 212 | sdl_lock (s, "sdl_close"); |
85571bc7 | 213 | s->exit = 1; |
1d14ffa9 | 214 | sdl_unlock_and_post (s, "sdl_close"); |
85571bc7 FB |
215 | SDL_PauseAudio (1); |
216 | SDL_CloseAudio (); | |
217 | s->initialized = 0; | |
218 | } | |
219 | } | |
220 | ||
221 | static void sdl_callback (void *opaque, Uint8 *buf, int len) | |
222 | { | |
1d14ffa9 | 223 | SDLVoiceOut *sdl = opaque; |
85571bc7 | 224 | SDLAudioState *s = &glob_sdl; |
1d14ffa9 FB |
225 | HWVoiceOut *hw = &sdl->hw; |
226 | int samples = len >> hw->info.shift; | |
85571bc7 | 227 | |
4839abe7 | 228 | if (sdl_lock (s, "sdl_callback")) { |
229 | return; | |
230 | } | |
231 | ||
85571bc7 FB |
232 | if (s->exit) { |
233 | return; | |
234 | } | |
235 | ||
236 | while (samples) { | |
1d14ffa9 | 237 | int to_mix, decr; |
85571bc7 | 238 | |
4839abe7 | 239 | while (!sdl->pending) { |
240 | if (sdl_unlock (s, "sdl_callback")) { | |
241 | return; | |
242 | } | |
243 | ||
244 | sdl_wait (s, "sdl_callback"); | |
245 | if (s->exit) { | |
246 | return; | |
247 | } | |
248 | ||
249 | if (sdl_lock (s, "sdl_callback")) { | |
250 | return; | |
251 | } | |
252 | sdl->pending += sdl->live; | |
253 | sdl->live = 0; | |
1d14ffa9 | 254 | } |
85571bc7 | 255 | |
4839abe7 | 256 | to_mix = audio_MIN (samples, sdl->pending); |
257 | decr = audio_pcm_hw_clip_out (hw, buf, to_mix, 0); | |
258 | buf += decr << hw->info.shift; | |
85571bc7 | 259 | samples -= decr; |
1d14ffa9 | 260 | sdl->decr += decr; |
4839abe7 | 261 | sdl->pending -= decr; |
262 | } | |
85571bc7 | 263 | |
4839abe7 | 264 | if (sdl_unlock (s, "sdl_callback")) { |
265 | return; | |
85571bc7 | 266 | } |
85571bc7 FB |
267 | } |
268 | ||
1d14ffa9 | 269 | static int sdl_write_out (SWVoiceOut *sw, void *buf, int len) |
85571bc7 | 270 | { |
1d14ffa9 FB |
271 | return audio_pcm_sw_write (sw, buf, len); |
272 | } | |
273 | ||
bdff253c | 274 | static int sdl_run_out (HWVoiceOut *hw, int live) |
1d14ffa9 | 275 | { |
bdff253c | 276 | int decr; |
1d14ffa9 FB |
277 | SDLVoiceOut *sdl = (SDLVoiceOut *) hw; |
278 | SDLAudioState *s = &glob_sdl; | |
279 | ||
3fd7f635 | 280 | if (sdl_lock (s, "sdl_run_out")) { |
1d14ffa9 FB |
281 | return 0; |
282 | } | |
283 | ||
4839abe7 | 284 | sdl->live = live; |
285 | decr = sdl->decr; | |
286 | sdl->decr = 0; | |
1d14ffa9 FB |
287 | |
288 | if (sdl->live > 0) { | |
3fd7f635 | 289 | sdl_unlock_and_post (s, "sdl_run_out"); |
1d14ffa9 FB |
290 | } |
291 | else { | |
3fd7f635 | 292 | sdl_unlock (s, "sdl_run_out"); |
1d14ffa9 FB |
293 | } |
294 | return decr; | |
295 | } | |
296 | ||
297 | static void sdl_fini_out (HWVoiceOut *hw) | |
298 | { | |
299 | (void) hw; | |
300 | ||
85571bc7 FB |
301 | sdl_close (&glob_sdl); |
302 | } | |
303 | ||
1ea879e5 | 304 | static int sdl_init_out (HWVoiceOut *hw, struct audsettings *as) |
85571bc7 | 305 | { |
1d14ffa9 | 306 | SDLVoiceOut *sdl = (SDLVoiceOut *) hw; |
85571bc7 FB |
307 | SDLAudioState *s = &glob_sdl; |
308 | SDL_AudioSpec req, obt; | |
309 | int shift; | |
1d14ffa9 FB |
310 | int endianess; |
311 | int err; | |
312 | audfmt_e effective_fmt; | |
1ea879e5 | 313 | struct audsettings obt_as; |
85571bc7 | 314 | |
c0fe3827 | 315 | shift <<= as->nchannels == 2; |
85571bc7 | 316 | |
c0fe3827 FB |
317 | req.freq = as->freq; |
318 | req.format = aud_to_sdlfmt (as->fmt, &shift); | |
319 | req.channels = as->nchannels; | |
85571bc7 | 320 | req.samples = conf.nb_samples; |
85571bc7 FB |
321 | req.callback = sdl_callback; |
322 | req.userdata = sdl; | |
323 | ||
1d14ffa9 FB |
324 | if (sdl_open (&req, &obt)) { |
325 | return -1; | |
326 | } | |
327 | ||
328 | err = sdl_to_audfmt (obt.format, &effective_fmt, &endianess); | |
329 | if (err) { | |
330 | sdl_close (s); | |
85571bc7 | 331 | return -1; |
1d14ffa9 | 332 | } |
85571bc7 | 333 | |
c0fe3827 FB |
334 | obt_as.freq = obt.freq; |
335 | obt_as.nchannels = obt.channels; | |
336 | obt_as.fmt = effective_fmt; | |
d929eba5 | 337 | obt_as.endianness = endianess; |
c0fe3827 | 338 | |
d929eba5 | 339 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 | 340 | hw->samples = obt.samples; |
85571bc7 FB |
341 | |
342 | s->initialized = 1; | |
343 | s->exit = 0; | |
344 | SDL_PauseAudio (0); | |
345 | return 0; | |
346 | } | |
347 | ||
1d14ffa9 | 348 | static int sdl_ctl_out (HWVoiceOut *hw, int cmd, ...) |
85571bc7 FB |
349 | { |
350 | (void) hw; | |
351 | ||
352 | switch (cmd) { | |
353 | case VOICE_ENABLE: | |
354 | SDL_PauseAudio (0); | |
355 | break; | |
356 | ||
357 | case VOICE_DISABLE: | |
358 | SDL_PauseAudio (1); | |
359 | break; | |
360 | } | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static void *sdl_audio_init (void) | |
365 | { | |
366 | SDLAudioState *s = &glob_sdl; | |
85571bc7 FB |
367 | |
368 | if (SDL_InitSubSystem (SDL_INIT_AUDIO)) { | |
1d14ffa9 | 369 | sdl_logerr ("SDL failed to initialize audio subsystem\n"); |
85571bc7 FB |
370 | return NULL; |
371 | } | |
372 | ||
373 | s->mutex = SDL_CreateMutex (); | |
374 | if (!s->mutex) { | |
1d14ffa9 | 375 | sdl_logerr ("Failed to create SDL mutex\n"); |
85571bc7 FB |
376 | SDL_QuitSubSystem (SDL_INIT_AUDIO); |
377 | return NULL; | |
378 | } | |
379 | ||
380 | s->sem = SDL_CreateSemaphore (0); | |
381 | if (!s->sem) { | |
1d14ffa9 | 382 | sdl_logerr ("Failed to create SDL semaphore\n"); |
85571bc7 FB |
383 | SDL_DestroyMutex (s->mutex); |
384 | SDL_QuitSubSystem (SDL_INIT_AUDIO); | |
385 | return NULL; | |
386 | } | |
387 | ||
388 | return s; | |
389 | } | |
390 | ||
391 | static void sdl_audio_fini (void *opaque) | |
392 | { | |
393 | SDLAudioState *s = opaque; | |
394 | sdl_close (s); | |
395 | SDL_DestroySemaphore (s->sem); | |
396 | SDL_DestroyMutex (s->mutex); | |
397 | SDL_QuitSubSystem (SDL_INIT_AUDIO); | |
398 | } | |
399 | ||
1d14ffa9 | 400 | static struct audio_option sdl_options[] = { |
98f9f48c | 401 | { |
402 | .name = "SAMPLES", | |
403 | .tag = AUD_OPT_INT, | |
404 | .valp = &conf.nb_samples, | |
405 | .descr = "Size of SDL buffer in samples" | |
406 | }, | |
2700efa3 | 407 | { /* End of list */ } |
1d14ffa9 FB |
408 | }; |
409 | ||
35f4b58c | 410 | static struct audio_pcm_ops sdl_pcm_ops = { |
1dd3e4d1 JQ |
411 | .init_out = sdl_init_out, |
412 | .fini_out = sdl_fini_out, | |
413 | .run_out = sdl_run_out, | |
414 | .write = sdl_write_out, | |
415 | .ctl_out = sdl_ctl_out, | |
85571bc7 FB |
416 | }; |
417 | ||
1d14ffa9 | 418 | struct audio_driver sdl_audio_driver = { |
bee37f32 JQ |
419 | .name = "sdl", |
420 | .descr = "SDL http://www.libsdl.org", | |
421 | .options = sdl_options, | |
422 | .init = sdl_audio_init, | |
423 | .fini = sdl_audio_fini, | |
424 | .pcm_ops = &sdl_pcm_ops, | |
425 | .can_be_default = 1, | |
426 | .max_voices_out = 1, | |
427 | .max_voices_in = 0, | |
428 | .voice_size_out = sizeof (SDLVoiceOut), | |
429 | .voice_size_in = 0 | |
85571bc7 | 430 | }; |