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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 | */ | |
6086a565 | 24 | #include "qemu/osdep.h" |
9f059eca FB |
25 | #include <SDL.h> |
26 | #include <SDL_thread.h> | |
87ecb68b PB |
27 | #include "qemu-common.h" |
28 | #include "audio.h" | |
85571bc7 | 29 | |
e784ba70 TS |
30 | #ifndef _WIN32 |
31 | #ifdef __sun__ | |
32 | #define _POSIX_PTHREAD_SEMANTICS 1 | |
c5e97233 | 33 | #elif defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) |
9b4c14c3 | 34 | #include <pthread.h> |
e784ba70 | 35 | #endif |
e784ba70 TS |
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 FB |
44 | int decr; |
45 | } SDLVoiceOut; | |
85571bc7 FB |
46 | |
47 | static struct { | |
48 | int nb_samples; | |
49 | } conf = { | |
1a40d5e2 | 50 | .nb_samples = 1024 |
85571bc7 FB |
51 | }; |
52 | ||
b1d8e52e | 53 | static struct SDLAudioState { |
85571bc7 | 54 | int exit; |
85571bc7 | 55 | int initialized; |
81ebb07c | 56 | bool driver_created; |
85571bc7 FB |
57 | } glob_sdl; |
58 | typedef struct SDLAudioState SDLAudioState; | |
59 | ||
1d14ffa9 | 60 | static void GCC_FMT_ATTR (1, 2) sdl_logerr (const char *fmt, ...) |
85571bc7 | 61 | { |
1d14ffa9 FB |
62 | va_list ap; |
63 | ||
64 | va_start (ap, fmt); | |
65 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
66 | va_end (ap); | |
67 | ||
68 | AUD_log (AUDIO_CAP, "Reason: %s\n", SDL_GetError ()); | |
85571bc7 FB |
69 | } |
70 | ||
6c557ab9 | 71 | static int aud_to_sdlfmt (audfmt_e fmt) |
85571bc7 | 72 | { |
85571bc7 | 73 | switch (fmt) { |
1d14ffa9 | 74 | case AUD_FMT_S8: |
1d14ffa9 FB |
75 | return AUDIO_S8; |
76 | ||
77 | case AUD_FMT_U8: | |
1d14ffa9 FB |
78 | return AUDIO_U8; |
79 | ||
80 | case AUD_FMT_S16: | |
1d14ffa9 FB |
81 | return AUDIO_S16LSB; |
82 | ||
83 | case AUD_FMT_U16: | |
1d14ffa9 FB |
84 | return AUDIO_U16LSB; |
85 | ||
85571bc7 | 86 | default: |
1d14ffa9 FB |
87 | dolog ("Internal logic error: Bad audio format %d\n", fmt); |
88 | #ifdef DEBUG_AUDIO | |
89 | abort (); | |
90 | #endif | |
91 | return AUDIO_U8; | |
85571bc7 FB |
92 | } |
93 | } | |
94 | ||
4ff9786c | 95 | static int sdl_to_audfmt(int sdlfmt, audfmt_e *fmt, int *endianness) |
85571bc7 | 96 | { |
1d14ffa9 FB |
97 | switch (sdlfmt) { |
98 | case AUDIO_S8: | |
4ff9786c | 99 | *endianness = 0; |
1d14ffa9 FB |
100 | *fmt = AUD_FMT_S8; |
101 | break; | |
102 | ||
103 | case AUDIO_U8: | |
4ff9786c | 104 | *endianness = 0; |
1d14ffa9 FB |
105 | *fmt = AUD_FMT_U8; |
106 | break; | |
107 | ||
108 | case AUDIO_S16LSB: | |
4ff9786c | 109 | *endianness = 0; |
1d14ffa9 FB |
110 | *fmt = AUD_FMT_S16; |
111 | break; | |
112 | ||
113 | case AUDIO_U16LSB: | |
4ff9786c | 114 | *endianness = 0; |
1d14ffa9 FB |
115 | *fmt = AUD_FMT_U16; |
116 | break; | |
117 | ||
118 | case AUDIO_S16MSB: | |
4ff9786c | 119 | *endianness = 1; |
1d14ffa9 FB |
120 | *fmt = AUD_FMT_S16; |
121 | break; | |
122 | ||
123 | case AUDIO_U16MSB: | |
4ff9786c | 124 | *endianness = 1; |
1d14ffa9 FB |
125 | *fmt = AUD_FMT_U16; |
126 | break; | |
127 | ||
85571bc7 | 128 | default: |
1d14ffa9 FB |
129 | dolog ("Unrecognized SDL audio format %d\n", sdlfmt); |
130 | return -1; | |
85571bc7 | 131 | } |
1d14ffa9 FB |
132 | |
133 | return 0; | |
85571bc7 FB |
134 | } |
135 | ||
136 | static int sdl_open (SDL_AudioSpec *req, SDL_AudioSpec *obt) | |
137 | { | |
138 | int status; | |
e784ba70 | 139 | #ifndef _WIN32 |
d087bb3e | 140 | int err; |
e784ba70 TS |
141 | sigset_t new, old; |
142 | ||
143 | /* Make sure potential threads created by SDL don't hog signals. */ | |
d087bb3e | 144 | err = sigfillset (&new); |
145 | if (err) { | |
146 | dolog ("sdl_open: sigfillset failed: %s\n", strerror (errno)); | |
60592edd | 147 | return -1; |
d087bb3e | 148 | } |
149 | err = pthread_sigmask (SIG_BLOCK, &new, &old); | |
150 | if (err) { | |
151 | dolog ("sdl_open: pthread_sigmask failed: %s\n", strerror (err)); | |
152 | return -1; | |
153 | } | |
e784ba70 | 154 | #endif |
85571bc7 FB |
155 | |
156 | status = SDL_OpenAudio (req, obt); | |
157 | if (status) { | |
1d14ffa9 | 158 | sdl_logerr ("SDL_OpenAudio failed\n"); |
85571bc7 | 159 | } |
e784ba70 TS |
160 | |
161 | #ifndef _WIN32 | |
d087bb3e | 162 | err = pthread_sigmask (SIG_SETMASK, &old, NULL); |
163 | if (err) { | |
164 | dolog ("sdl_open: pthread_sigmask (restore) failed: %s\n", | |
165 | strerror (errno)); | |
166 | /* We have failed to restore original signal mask, all bets are off, | |
167 | so exit the process */ | |
168 | exit (EXIT_FAILURE); | |
169 | } | |
e784ba70 | 170 | #endif |
85571bc7 FB |
171 | return status; |
172 | } | |
173 | ||
174 | static void sdl_close (SDLAudioState *s) | |
175 | { | |
176 | if (s->initialized) { | |
8a7816c4 | 177 | SDL_LockAudio(); |
85571bc7 | 178 | s->exit = 1; |
8a7816c4 | 179 | SDL_UnlockAudio(); |
85571bc7 FB |
180 | SDL_PauseAudio (1); |
181 | SDL_CloseAudio (); | |
182 | s->initialized = 0; | |
183 | } | |
184 | } | |
185 | ||
186 | static void sdl_callback (void *opaque, Uint8 *buf, int len) | |
187 | { | |
1d14ffa9 | 188 | SDLVoiceOut *sdl = opaque; |
85571bc7 | 189 | SDLAudioState *s = &glob_sdl; |
1d14ffa9 FB |
190 | HWVoiceOut *hw = &sdl->hw; |
191 | int samples = len >> hw->info.shift; | |
85571bc7 FB |
192 | |
193 | if (s->exit) { | |
194 | return; | |
195 | } | |
196 | ||
197 | while (samples) { | |
1d14ffa9 | 198 | int to_mix, decr; |
85571bc7 | 199 | |
ff541499 | 200 | /* dolog ("in callback samples=%d\n", samples); */ |
ff541499 | 201 | |
bcf19777 TH |
202 | if (s->exit || !sdl->live) { |
203 | break; | |
204 | } | |
85571bc7 | 205 | |
ff541499 | 206 | /* dolog ("in callback live=%d\n", live); */ |
207 | to_mix = audio_MIN (samples, sdl->live); | |
208 | decr = to_mix; | |
209 | while (to_mix) { | |
210 | int chunk = audio_MIN (to_mix, hw->samples - hw->rpos); | |
211 | struct st_sample *src = hw->mix_buf + hw->rpos; | |
212 | ||
213 | /* dolog ("in callback to_mix %d, chunk %d\n", to_mix, chunk); */ | |
214 | hw->clip (buf, src, chunk); | |
bcf19777 | 215 | hw->rpos = (hw->rpos + chunk) % hw->samples; |
ff541499 | 216 | to_mix -= chunk; |
217 | buf += chunk << hw->info.shift; | |
218 | } | |
85571bc7 | 219 | samples -= decr; |
ff541499 | 220 | sdl->live -= decr; |
1d14ffa9 | 221 | sdl->decr += decr; |
85571bc7 | 222 | } |
ff541499 | 223 | /* dolog ("done len=%d\n", len); */ |
bcf19777 | 224 | |
bcf19777 TH |
225 | /* SDL2 does not clear the remaining buffer for us, so do it on our own */ |
226 | if (samples) { | |
227 | memset(buf, 0, samples << hw->info.shift); | |
228 | } | |
85571bc7 FB |
229 | } |
230 | ||
1d14ffa9 | 231 | static int sdl_write_out (SWVoiceOut *sw, void *buf, int len) |
85571bc7 | 232 | { |
1d14ffa9 FB |
233 | return audio_pcm_sw_write (sw, buf, len); |
234 | } | |
235 | ||
bdff253c | 236 | static int sdl_run_out (HWVoiceOut *hw, int live) |
1d14ffa9 | 237 | { |
bdff253c | 238 | int decr; |
1d14ffa9 | 239 | SDLVoiceOut *sdl = (SDLVoiceOut *) hw; |
1d14ffa9 | 240 | |
8a7816c4 | 241 | SDL_LockAudio(); |
1d14ffa9 | 242 | |
ff541499 | 243 | if (sdl->decr > live) { |
244 | ldebug ("sdl->decr %d live %d sdl->live %d\n", | |
245 | sdl->decr, | |
246 | live, | |
247 | sdl->live); | |
248 | } | |
249 | ||
250 | decr = audio_MIN (sdl->decr, live); | |
251 | sdl->decr -= decr; | |
252 | ||
bcf19777 | 253 | sdl->live = live; |
1d14ffa9 | 254 | |
8a7816c4 TH |
255 | SDL_UnlockAudio(); |
256 | ||
1d14ffa9 FB |
257 | return decr; |
258 | } | |
259 | ||
260 | static void sdl_fini_out (HWVoiceOut *hw) | |
261 | { | |
262 | (void) hw; | |
263 | ||
85571bc7 FB |
264 | sdl_close (&glob_sdl); |
265 | } | |
266 | ||
5706db1d KZ |
267 | static int sdl_init_out(HWVoiceOut *hw, struct audsettings *as, |
268 | void *drv_opaque) | |
85571bc7 | 269 | { |
1d14ffa9 | 270 | SDLVoiceOut *sdl = (SDLVoiceOut *) hw; |
85571bc7 FB |
271 | SDLAudioState *s = &glob_sdl; |
272 | SDL_AudioSpec req, obt; | |
4ff9786c | 273 | int endianness; |
1d14ffa9 FB |
274 | int err; |
275 | audfmt_e effective_fmt; | |
1ea879e5 | 276 | struct audsettings obt_as; |
85571bc7 | 277 | |
c0fe3827 | 278 | req.freq = as->freq; |
6c557ab9 | 279 | req.format = aud_to_sdlfmt (as->fmt); |
c0fe3827 | 280 | req.channels = as->nchannels; |
85571bc7 | 281 | req.samples = conf.nb_samples; |
85571bc7 FB |
282 | req.callback = sdl_callback; |
283 | req.userdata = sdl; | |
284 | ||
1d14ffa9 FB |
285 | if (sdl_open (&req, &obt)) { |
286 | return -1; | |
287 | } | |
288 | ||
4ff9786c | 289 | err = sdl_to_audfmt(obt.format, &effective_fmt, &endianness); |
1d14ffa9 FB |
290 | if (err) { |
291 | sdl_close (s); | |
85571bc7 | 292 | return -1; |
1d14ffa9 | 293 | } |
85571bc7 | 294 | |
c0fe3827 FB |
295 | obt_as.freq = obt.freq; |
296 | obt_as.nchannels = obt.channels; | |
297 | obt_as.fmt = effective_fmt; | |
4ff9786c | 298 | obt_as.endianness = endianness; |
c0fe3827 | 299 | |
d929eba5 | 300 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 | 301 | hw->samples = obt.samples; |
85571bc7 FB |
302 | |
303 | s->initialized = 1; | |
304 | s->exit = 0; | |
305 | SDL_PauseAudio (0); | |
306 | return 0; | |
307 | } | |
308 | ||
1d14ffa9 | 309 | static int sdl_ctl_out (HWVoiceOut *hw, int cmd, ...) |
85571bc7 FB |
310 | { |
311 | (void) hw; | |
312 | ||
313 | switch (cmd) { | |
314 | case VOICE_ENABLE: | |
315 | SDL_PauseAudio (0); | |
316 | break; | |
317 | ||
318 | case VOICE_DISABLE: | |
319 | SDL_PauseAudio (1); | |
320 | break; | |
321 | } | |
322 | return 0; | |
323 | } | |
324 | ||
325 | static void *sdl_audio_init (void) | |
326 | { | |
327 | SDLAudioState *s = &glob_sdl; | |
81ebb07c KZ |
328 | if (s->driver_created) { |
329 | sdl_logerr("Can't create multiple sdl backends\n"); | |
330 | return NULL; | |
331 | } | |
85571bc7 FB |
332 | |
333 | if (SDL_InitSubSystem (SDL_INIT_AUDIO)) { | |
1d14ffa9 | 334 | sdl_logerr ("SDL failed to initialize audio subsystem\n"); |
85571bc7 FB |
335 | return NULL; |
336 | } | |
337 | ||
81ebb07c | 338 | s->driver_created = true; |
85571bc7 FB |
339 | return s; |
340 | } | |
341 | ||
342 | static void sdl_audio_fini (void *opaque) | |
343 | { | |
344 | SDLAudioState *s = opaque; | |
345 | sdl_close (s); | |
85571bc7 | 346 | SDL_QuitSubSystem (SDL_INIT_AUDIO); |
81ebb07c | 347 | s->driver_created = false; |
85571bc7 FB |
348 | } |
349 | ||
1d14ffa9 | 350 | static struct audio_option sdl_options[] = { |
98f9f48c | 351 | { |
352 | .name = "SAMPLES", | |
353 | .tag = AUD_OPT_INT, | |
354 | .valp = &conf.nb_samples, | |
355 | .descr = "Size of SDL buffer in samples" | |
356 | }, | |
2700efa3 | 357 | { /* End of list */ } |
1d14ffa9 FB |
358 | }; |
359 | ||
35f4b58c | 360 | static struct audio_pcm_ops sdl_pcm_ops = { |
1dd3e4d1 JQ |
361 | .init_out = sdl_init_out, |
362 | .fini_out = sdl_fini_out, | |
363 | .run_out = sdl_run_out, | |
364 | .write = sdl_write_out, | |
365 | .ctl_out = sdl_ctl_out, | |
85571bc7 FB |
366 | }; |
367 | ||
d3893a39 | 368 | static struct audio_driver sdl_audio_driver = { |
bee37f32 JQ |
369 | .name = "sdl", |
370 | .descr = "SDL http://www.libsdl.org", | |
371 | .options = sdl_options, | |
372 | .init = sdl_audio_init, | |
373 | .fini = sdl_audio_fini, | |
374 | .pcm_ops = &sdl_pcm_ops, | |
375 | .can_be_default = 1, | |
376 | .max_voices_out = 1, | |
377 | .max_voices_in = 0, | |
378 | .voice_size_out = sizeof (SDLVoiceOut), | |
379 | .voice_size_in = 0 | |
85571bc7 | 380 | }; |
d3893a39 GH |
381 | |
382 | static void register_audio_sdl(void) | |
383 | { | |
384 | audio_driver_register(&sdl_audio_driver); | |
385 | } | |
386 | type_init(register_audio_sdl); |