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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 | */ | |
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 | 46 | |
b1d8e52e | 47 | static struct SDLAudioState { |
85571bc7 | 48 | int exit; |
85571bc7 | 49 | int initialized; |
81ebb07c | 50 | bool driver_created; |
57dea553 | 51 | Audiodev *dev; |
85571bc7 FB |
52 | } glob_sdl; |
53 | typedef struct SDLAudioState SDLAudioState; | |
54 | ||
1d14ffa9 | 55 | static void GCC_FMT_ATTR (1, 2) sdl_logerr (const char *fmt, ...) |
85571bc7 | 56 | { |
1d14ffa9 FB |
57 | va_list ap; |
58 | ||
59 | va_start (ap, fmt); | |
60 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
61 | va_end (ap); | |
62 | ||
63 | AUD_log (AUDIO_CAP, "Reason: %s\n", SDL_GetError ()); | |
85571bc7 FB |
64 | } |
65 | ||
85bc5852 | 66 | static int aud_to_sdlfmt (AudioFormat fmt) |
85571bc7 | 67 | { |
85571bc7 | 68 | switch (fmt) { |
85bc5852 | 69 | case AUDIO_FORMAT_S8: |
1d14ffa9 FB |
70 | return AUDIO_S8; |
71 | ||
85bc5852 | 72 | case AUDIO_FORMAT_U8: |
1d14ffa9 FB |
73 | return AUDIO_U8; |
74 | ||
85bc5852 | 75 | case AUDIO_FORMAT_S16: |
1d14ffa9 FB |
76 | return AUDIO_S16LSB; |
77 | ||
85bc5852 | 78 | case AUDIO_FORMAT_U16: |
1d14ffa9 FB |
79 | return AUDIO_U16LSB; |
80 | ||
85571bc7 | 81 | default: |
1d14ffa9 FB |
82 | dolog ("Internal logic error: Bad audio format %d\n", fmt); |
83 | #ifdef DEBUG_AUDIO | |
84 | abort (); | |
85 | #endif | |
86 | return AUDIO_U8; | |
85571bc7 FB |
87 | } |
88 | } | |
89 | ||
85bc5852 | 90 | static int sdl_to_audfmt(int sdlfmt, AudioFormat *fmt, int *endianness) |
85571bc7 | 91 | { |
1d14ffa9 FB |
92 | switch (sdlfmt) { |
93 | case AUDIO_S8: | |
4ff9786c | 94 | *endianness = 0; |
85bc5852 | 95 | *fmt = AUDIO_FORMAT_S8; |
1d14ffa9 FB |
96 | break; |
97 | ||
98 | case AUDIO_U8: | |
4ff9786c | 99 | *endianness = 0; |
85bc5852 | 100 | *fmt = AUDIO_FORMAT_U8; |
1d14ffa9 FB |
101 | break; |
102 | ||
103 | case AUDIO_S16LSB: | |
4ff9786c | 104 | *endianness = 0; |
85bc5852 | 105 | *fmt = AUDIO_FORMAT_S16; |
1d14ffa9 FB |
106 | break; |
107 | ||
108 | case AUDIO_U16LSB: | |
4ff9786c | 109 | *endianness = 0; |
85bc5852 | 110 | *fmt = AUDIO_FORMAT_U16; |
1d14ffa9 FB |
111 | break; |
112 | ||
113 | case AUDIO_S16MSB: | |
4ff9786c | 114 | *endianness = 1; |
85bc5852 | 115 | *fmt = AUDIO_FORMAT_S16; |
1d14ffa9 FB |
116 | break; |
117 | ||
118 | case AUDIO_U16MSB: | |
4ff9786c | 119 | *endianness = 1; |
85bc5852 | 120 | *fmt = AUDIO_FORMAT_U16; |
1d14ffa9 FB |
121 | break; |
122 | ||
85571bc7 | 123 | default: |
1d14ffa9 FB |
124 | dolog ("Unrecognized SDL audio format %d\n", sdlfmt); |
125 | return -1; | |
85571bc7 | 126 | } |
1d14ffa9 FB |
127 | |
128 | return 0; | |
85571bc7 FB |
129 | } |
130 | ||
131 | static int sdl_open (SDL_AudioSpec *req, SDL_AudioSpec *obt) | |
132 | { | |
133 | int status; | |
e784ba70 | 134 | #ifndef _WIN32 |
d087bb3e | 135 | int err; |
e784ba70 TS |
136 | sigset_t new, old; |
137 | ||
138 | /* Make sure potential threads created by SDL don't hog signals. */ | |
d087bb3e | 139 | err = sigfillset (&new); |
140 | if (err) { | |
141 | dolog ("sdl_open: sigfillset failed: %s\n", strerror (errno)); | |
60592edd | 142 | return -1; |
d087bb3e | 143 | } |
144 | err = pthread_sigmask (SIG_BLOCK, &new, &old); | |
145 | if (err) { | |
146 | dolog ("sdl_open: pthread_sigmask failed: %s\n", strerror (err)); | |
147 | return -1; | |
148 | } | |
e784ba70 | 149 | #endif |
85571bc7 FB |
150 | |
151 | status = SDL_OpenAudio (req, obt); | |
152 | if (status) { | |
1d14ffa9 | 153 | sdl_logerr ("SDL_OpenAudio failed\n"); |
85571bc7 | 154 | } |
e784ba70 TS |
155 | |
156 | #ifndef _WIN32 | |
d087bb3e | 157 | err = pthread_sigmask (SIG_SETMASK, &old, NULL); |
158 | if (err) { | |
159 | dolog ("sdl_open: pthread_sigmask (restore) failed: %s\n", | |
160 | strerror (errno)); | |
161 | /* We have failed to restore original signal mask, all bets are off, | |
162 | so exit the process */ | |
163 | exit (EXIT_FAILURE); | |
164 | } | |
e784ba70 | 165 | #endif |
85571bc7 FB |
166 | return status; |
167 | } | |
168 | ||
169 | static void sdl_close (SDLAudioState *s) | |
170 | { | |
171 | if (s->initialized) { | |
8a7816c4 | 172 | SDL_LockAudio(); |
85571bc7 | 173 | s->exit = 1; |
8a7816c4 | 174 | SDL_UnlockAudio(); |
85571bc7 FB |
175 | SDL_PauseAudio (1); |
176 | SDL_CloseAudio (); | |
177 | s->initialized = 0; | |
178 | } | |
179 | } | |
180 | ||
181 | static void sdl_callback (void *opaque, Uint8 *buf, int len) | |
182 | { | |
1d14ffa9 | 183 | SDLVoiceOut *sdl = opaque; |
85571bc7 | 184 | SDLAudioState *s = &glob_sdl; |
1d14ffa9 FB |
185 | HWVoiceOut *hw = &sdl->hw; |
186 | int samples = len >> hw->info.shift; | |
9399ef16 | 187 | int to_mix, decr; |
85571bc7 | 188 | |
9399ef16 | 189 | if (s->exit || !sdl->live) { |
85571bc7 FB |
190 | return; |
191 | } | |
192 | ||
9399ef16 TH |
193 | /* dolog ("in callback samples=%d live=%d\n", samples, sdl->live); */ |
194 | ||
195 | to_mix = audio_MIN(samples, sdl->live); | |
196 | decr = to_mix; | |
197 | while (to_mix) { | |
198 | int chunk = audio_MIN(to_mix, hw->samples - hw->rpos); | |
199 | struct st_sample *src = hw->mix_buf + hw->rpos; | |
200 | ||
201 | /* dolog ("in callback to_mix %d, chunk %d\n", to_mix, chunk); */ | |
202 | hw->clip(buf, src, chunk); | |
203 | hw->rpos = (hw->rpos + chunk) % hw->samples; | |
204 | to_mix -= chunk; | |
205 | buf += chunk << hw->info.shift; | |
85571bc7 | 206 | } |
9399ef16 TH |
207 | samples -= decr; |
208 | sdl->live -= decr; | |
209 | sdl->decr += decr; | |
210 | ||
ff541499 | 211 | /* dolog ("done len=%d\n", len); */ |
bcf19777 | 212 | |
bcf19777 TH |
213 | /* SDL2 does not clear the remaining buffer for us, so do it on our own */ |
214 | if (samples) { | |
215 | memset(buf, 0, samples << hw->info.shift); | |
216 | } | |
85571bc7 FB |
217 | } |
218 | ||
1d14ffa9 | 219 | static int sdl_write_out (SWVoiceOut *sw, void *buf, int len) |
85571bc7 | 220 | { |
1d14ffa9 FB |
221 | return audio_pcm_sw_write (sw, buf, len); |
222 | } | |
223 | ||
bdff253c | 224 | static int sdl_run_out (HWVoiceOut *hw, int live) |
1d14ffa9 | 225 | { |
bdff253c | 226 | int decr; |
1d14ffa9 | 227 | SDLVoiceOut *sdl = (SDLVoiceOut *) hw; |
1d14ffa9 | 228 | |
8a7816c4 | 229 | SDL_LockAudio(); |
1d14ffa9 | 230 | |
ff541499 | 231 | if (sdl->decr > live) { |
232 | ldebug ("sdl->decr %d live %d sdl->live %d\n", | |
233 | sdl->decr, | |
234 | live, | |
235 | sdl->live); | |
236 | } | |
237 | ||
238 | decr = audio_MIN (sdl->decr, live); | |
239 | sdl->decr -= decr; | |
240 | ||
bcf19777 | 241 | sdl->live = live; |
1d14ffa9 | 242 | |
8a7816c4 TH |
243 | SDL_UnlockAudio(); |
244 | ||
1d14ffa9 FB |
245 | return decr; |
246 | } | |
247 | ||
248 | static void sdl_fini_out (HWVoiceOut *hw) | |
249 | { | |
250 | (void) hw; | |
251 | ||
85571bc7 FB |
252 | sdl_close (&glob_sdl); |
253 | } | |
254 | ||
5706db1d KZ |
255 | static int sdl_init_out(HWVoiceOut *hw, struct audsettings *as, |
256 | void *drv_opaque) | |
85571bc7 | 257 | { |
1d14ffa9 | 258 | SDLVoiceOut *sdl = (SDLVoiceOut *) hw; |
85571bc7 FB |
259 | SDLAudioState *s = &glob_sdl; |
260 | SDL_AudioSpec req, obt; | |
4ff9786c | 261 | int endianness; |
1d14ffa9 | 262 | int err; |
85bc5852 | 263 | AudioFormat effective_fmt; |
1ea879e5 | 264 | struct audsettings obt_as; |
85571bc7 | 265 | |
c0fe3827 | 266 | req.freq = as->freq; |
6c557ab9 | 267 | req.format = aud_to_sdlfmt (as->fmt); |
c0fe3827 | 268 | req.channels = as->nchannels; |
57dea553 | 269 | req.samples = audio_buffer_samples(s->dev->u.sdl.out, as, 11610); |
85571bc7 FB |
270 | req.callback = sdl_callback; |
271 | req.userdata = sdl; | |
272 | ||
1d14ffa9 FB |
273 | if (sdl_open (&req, &obt)) { |
274 | return -1; | |
275 | } | |
276 | ||
4ff9786c | 277 | err = sdl_to_audfmt(obt.format, &effective_fmt, &endianness); |
1d14ffa9 FB |
278 | if (err) { |
279 | sdl_close (s); | |
85571bc7 | 280 | return -1; |
1d14ffa9 | 281 | } |
85571bc7 | 282 | |
c0fe3827 FB |
283 | obt_as.freq = obt.freq; |
284 | obt_as.nchannels = obt.channels; | |
285 | obt_as.fmt = effective_fmt; | |
4ff9786c | 286 | obt_as.endianness = endianness; |
c0fe3827 | 287 | |
d929eba5 | 288 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 | 289 | hw->samples = obt.samples; |
85571bc7 FB |
290 | |
291 | s->initialized = 1; | |
292 | s->exit = 0; | |
293 | SDL_PauseAudio (0); | |
294 | return 0; | |
295 | } | |
296 | ||
1d14ffa9 | 297 | static int sdl_ctl_out (HWVoiceOut *hw, int cmd, ...) |
85571bc7 FB |
298 | { |
299 | (void) hw; | |
300 | ||
301 | switch (cmd) { | |
302 | case VOICE_ENABLE: | |
303 | SDL_PauseAudio (0); | |
304 | break; | |
305 | ||
306 | case VOICE_DISABLE: | |
307 | SDL_PauseAudio (1); | |
308 | break; | |
309 | } | |
310 | return 0; | |
311 | } | |
312 | ||
71830221 | 313 | static void *sdl_audio_init(Audiodev *dev) |
85571bc7 FB |
314 | { |
315 | SDLAudioState *s = &glob_sdl; | |
81ebb07c KZ |
316 | if (s->driver_created) { |
317 | sdl_logerr("Can't create multiple sdl backends\n"); | |
318 | return NULL; | |
319 | } | |
85571bc7 FB |
320 | |
321 | if (SDL_InitSubSystem (SDL_INIT_AUDIO)) { | |
1d14ffa9 | 322 | sdl_logerr ("SDL failed to initialize audio subsystem\n"); |
85571bc7 FB |
323 | return NULL; |
324 | } | |
325 | ||
81ebb07c | 326 | s->driver_created = true; |
57dea553 | 327 | s->dev = dev; |
85571bc7 FB |
328 | return s; |
329 | } | |
330 | ||
331 | static void sdl_audio_fini (void *opaque) | |
332 | { | |
333 | SDLAudioState *s = opaque; | |
334 | sdl_close (s); | |
85571bc7 | 335 | SDL_QuitSubSystem (SDL_INIT_AUDIO); |
81ebb07c | 336 | s->driver_created = false; |
57dea553 | 337 | s->dev = NULL; |
85571bc7 FB |
338 | } |
339 | ||
35f4b58c | 340 | static struct audio_pcm_ops sdl_pcm_ops = { |
1dd3e4d1 JQ |
341 | .init_out = sdl_init_out, |
342 | .fini_out = sdl_fini_out, | |
343 | .run_out = sdl_run_out, | |
344 | .write = sdl_write_out, | |
345 | .ctl_out = sdl_ctl_out, | |
85571bc7 FB |
346 | }; |
347 | ||
d3893a39 | 348 | static struct audio_driver sdl_audio_driver = { |
bee37f32 JQ |
349 | .name = "sdl", |
350 | .descr = "SDL http://www.libsdl.org", | |
bee37f32 JQ |
351 | .init = sdl_audio_init, |
352 | .fini = sdl_audio_fini, | |
353 | .pcm_ops = &sdl_pcm_ops, | |
354 | .can_be_default = 1, | |
355 | .max_voices_out = 1, | |
356 | .max_voices_in = 0, | |
357 | .voice_size_out = sizeof (SDLVoiceOut), | |
358 | .voice_size_in = 0 | |
85571bc7 | 359 | }; |
d3893a39 GH |
360 | |
361 | static void register_audio_sdl(void) | |
362 | { | |
363 | audio_driver_register(&sdl_audio_driver); | |
364 | } | |
365 | type_init(register_audio_sdl); |