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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; | |
ff541499 | 44 | int rpos; |
1d14ffa9 FB |
45 | int decr; |
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 FB |
227 | |
228 | if (s->exit) { | |
229 | return; | |
230 | } | |
231 | ||
232 | while (samples) { | |
1d14ffa9 | 233 | int to_mix, decr; |
85571bc7 | 234 | |
ff541499 | 235 | /* dolog ("in callback samples=%d\n", samples); */ |
236 | sdl_wait (s, "sdl_callback"); | |
237 | if (s->exit) { | |
238 | return; | |
239 | } | |
240 | ||
241 | if (sdl_lock (s, "sdl_callback")) { | |
242 | return; | |
243 | } | |
244 | ||
245 | if (audio_bug (AUDIO_FUNC, sdl->live < 0 || sdl->live > hw->samples)) { | |
246 | dolog ("sdl->live=%d hw->samples=%d\n", | |
247 | sdl->live, hw->samples); | |
248 | return; | |
249 | } | |
250 | ||
251 | if (!sdl->live) { | |
252 | goto again; | |
1d14ffa9 | 253 | } |
85571bc7 | 254 | |
ff541499 | 255 | /* dolog ("in callback live=%d\n", live); */ |
256 | to_mix = audio_MIN (samples, sdl->live); | |
257 | decr = to_mix; | |
258 | while (to_mix) { | |
259 | int chunk = audio_MIN (to_mix, hw->samples - hw->rpos); | |
260 | struct st_sample *src = hw->mix_buf + hw->rpos; | |
261 | ||
262 | /* dolog ("in callback to_mix %d, chunk %d\n", to_mix, chunk); */ | |
263 | hw->clip (buf, src, chunk); | |
264 | sdl->rpos = (sdl->rpos + chunk) % hw->samples; | |
265 | to_mix -= chunk; | |
266 | buf += chunk << hw->info.shift; | |
267 | } | |
85571bc7 | 268 | samples -= decr; |
ff541499 | 269 | sdl->live -= decr; |
1d14ffa9 | 270 | sdl->decr += decr; |
85571bc7 | 271 | |
ff541499 | 272 | again: |
273 | if (sdl_unlock (s, "sdl_callback")) { | |
274 | return; | |
275 | } | |
85571bc7 | 276 | } |
ff541499 | 277 | /* dolog ("done len=%d\n", len); */ |
85571bc7 FB |
278 | } |
279 | ||
1d14ffa9 | 280 | static int sdl_write_out (SWVoiceOut *sw, void *buf, int len) |
85571bc7 | 281 | { |
1d14ffa9 FB |
282 | return audio_pcm_sw_write (sw, buf, len); |
283 | } | |
284 | ||
bdff253c | 285 | static int sdl_run_out (HWVoiceOut *hw, int live) |
1d14ffa9 | 286 | { |
bdff253c | 287 | int decr; |
1d14ffa9 FB |
288 | SDLVoiceOut *sdl = (SDLVoiceOut *) hw; |
289 | SDLAudioState *s = &glob_sdl; | |
290 | ||
3fd7f635 | 291 | if (sdl_lock (s, "sdl_run_out")) { |
1d14ffa9 FB |
292 | return 0; |
293 | } | |
294 | ||
ff541499 | 295 | if (sdl->decr > live) { |
296 | ldebug ("sdl->decr %d live %d sdl->live %d\n", | |
297 | sdl->decr, | |
298 | live, | |
299 | sdl->live); | |
300 | } | |
301 | ||
302 | decr = audio_MIN (sdl->decr, live); | |
303 | sdl->decr -= decr; | |
304 | ||
305 | sdl->live = live - decr; | |
306 | hw->rpos = sdl->rpos; | |
1d14ffa9 FB |
307 | |
308 | if (sdl->live > 0) { | |
3fd7f635 | 309 | sdl_unlock_and_post (s, "sdl_run_out"); |
1d14ffa9 FB |
310 | } |
311 | else { | |
3fd7f635 | 312 | sdl_unlock (s, "sdl_run_out"); |
1d14ffa9 FB |
313 | } |
314 | return decr; | |
315 | } | |
316 | ||
317 | static void sdl_fini_out (HWVoiceOut *hw) | |
318 | { | |
319 | (void) hw; | |
320 | ||
85571bc7 FB |
321 | sdl_close (&glob_sdl); |
322 | } | |
323 | ||
1ea879e5 | 324 | static int sdl_init_out (HWVoiceOut *hw, struct audsettings *as) |
85571bc7 | 325 | { |
1d14ffa9 | 326 | SDLVoiceOut *sdl = (SDLVoiceOut *) hw; |
85571bc7 FB |
327 | SDLAudioState *s = &glob_sdl; |
328 | SDL_AudioSpec req, obt; | |
329 | int shift; | |
1d14ffa9 FB |
330 | int endianess; |
331 | int err; | |
332 | audfmt_e effective_fmt; | |
1ea879e5 | 333 | struct audsettings obt_as; |
85571bc7 | 334 | |
c0fe3827 | 335 | shift <<= as->nchannels == 2; |
85571bc7 | 336 | |
c0fe3827 FB |
337 | req.freq = as->freq; |
338 | req.format = aud_to_sdlfmt (as->fmt, &shift); | |
339 | req.channels = as->nchannels; | |
85571bc7 | 340 | req.samples = conf.nb_samples; |
85571bc7 FB |
341 | req.callback = sdl_callback; |
342 | req.userdata = sdl; | |
343 | ||
1d14ffa9 FB |
344 | if (sdl_open (&req, &obt)) { |
345 | return -1; | |
346 | } | |
347 | ||
348 | err = sdl_to_audfmt (obt.format, &effective_fmt, &endianess); | |
349 | if (err) { | |
350 | sdl_close (s); | |
85571bc7 | 351 | return -1; |
1d14ffa9 | 352 | } |
85571bc7 | 353 | |
c0fe3827 FB |
354 | obt_as.freq = obt.freq; |
355 | obt_as.nchannels = obt.channels; | |
356 | obt_as.fmt = effective_fmt; | |
d929eba5 | 357 | obt_as.endianness = endianess; |
c0fe3827 | 358 | |
d929eba5 | 359 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 | 360 | hw->samples = obt.samples; |
85571bc7 FB |
361 | |
362 | s->initialized = 1; | |
363 | s->exit = 0; | |
364 | SDL_PauseAudio (0); | |
365 | return 0; | |
366 | } | |
367 | ||
1d14ffa9 | 368 | static int sdl_ctl_out (HWVoiceOut *hw, int cmd, ...) |
85571bc7 FB |
369 | { |
370 | (void) hw; | |
371 | ||
372 | switch (cmd) { | |
373 | case VOICE_ENABLE: | |
374 | SDL_PauseAudio (0); | |
375 | break; | |
376 | ||
377 | case VOICE_DISABLE: | |
378 | SDL_PauseAudio (1); | |
379 | break; | |
380 | } | |
381 | return 0; | |
382 | } | |
383 | ||
384 | static void *sdl_audio_init (void) | |
385 | { | |
386 | SDLAudioState *s = &glob_sdl; | |
85571bc7 FB |
387 | |
388 | if (SDL_InitSubSystem (SDL_INIT_AUDIO)) { | |
1d14ffa9 | 389 | sdl_logerr ("SDL failed to initialize audio subsystem\n"); |
85571bc7 FB |
390 | return NULL; |
391 | } | |
392 | ||
393 | s->mutex = SDL_CreateMutex (); | |
394 | if (!s->mutex) { | |
1d14ffa9 | 395 | sdl_logerr ("Failed to create SDL mutex\n"); |
85571bc7 FB |
396 | SDL_QuitSubSystem (SDL_INIT_AUDIO); |
397 | return NULL; | |
398 | } | |
399 | ||
400 | s->sem = SDL_CreateSemaphore (0); | |
401 | if (!s->sem) { | |
1d14ffa9 | 402 | sdl_logerr ("Failed to create SDL semaphore\n"); |
85571bc7 FB |
403 | SDL_DestroyMutex (s->mutex); |
404 | SDL_QuitSubSystem (SDL_INIT_AUDIO); | |
405 | return NULL; | |
406 | } | |
407 | ||
408 | return s; | |
409 | } | |
410 | ||
411 | static void sdl_audio_fini (void *opaque) | |
412 | { | |
413 | SDLAudioState *s = opaque; | |
414 | sdl_close (s); | |
415 | SDL_DestroySemaphore (s->sem); | |
416 | SDL_DestroyMutex (s->mutex); | |
417 | SDL_QuitSubSystem (SDL_INIT_AUDIO); | |
418 | } | |
419 | ||
1d14ffa9 | 420 | static struct audio_option sdl_options[] = { |
98f9f48c | 421 | { |
422 | .name = "SAMPLES", | |
423 | .tag = AUD_OPT_INT, | |
424 | .valp = &conf.nb_samples, | |
425 | .descr = "Size of SDL buffer in samples" | |
426 | }, | |
2700efa3 | 427 | { /* End of list */ } |
1d14ffa9 FB |
428 | }; |
429 | ||
35f4b58c | 430 | static struct audio_pcm_ops sdl_pcm_ops = { |
1dd3e4d1 JQ |
431 | .init_out = sdl_init_out, |
432 | .fini_out = sdl_fini_out, | |
433 | .run_out = sdl_run_out, | |
434 | .write = sdl_write_out, | |
435 | .ctl_out = sdl_ctl_out, | |
85571bc7 FB |
436 | }; |
437 | ||
1d14ffa9 | 438 | struct audio_driver sdl_audio_driver = { |
bee37f32 JQ |
439 | .name = "sdl", |
440 | .descr = "SDL http://www.libsdl.org", | |
441 | .options = sdl_options, | |
442 | .init = sdl_audio_init, | |
443 | .fini = sdl_audio_fini, | |
444 | .pcm_ops = &sdl_pcm_ops, | |
445 | .can_be_default = 1, | |
446 | .max_voices_out = 1, | |
447 | .max_voices_in = 0, | |
448 | .voice_size_out = sizeof (SDLVoiceOut), | |
449 | .voice_size_in = 0 | |
85571bc7 | 450 | }; |