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1 | /* | |
2 | * QEMU SDL audio driver | |
3 | * | |
4 | * Copyright (c) 2004-2005 Vassili Karpov (malc) | |
5 | * | |
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 | */ | |
24 | ||
25 | #include "qemu/osdep.h" | |
26 | #include <SDL.h> | |
27 | #include <SDL_thread.h> | |
28 | #include "qemu/module.h" | |
29 | #include "audio.h" | |
30 | ||
31 | #ifndef _WIN32 | |
32 | #ifdef __sun__ | |
33 | #define _POSIX_PTHREAD_SEMANTICS 1 | |
34 | #elif defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) | |
35 | #include <pthread.h> | |
36 | #endif | |
37 | #endif | |
38 | ||
39 | #define AUDIO_CAP "sdl" | |
40 | #include "audio_int.h" | |
41 | ||
42 | typedef struct SDLVoiceOut { | |
43 | HWVoiceOut hw; | |
44 | int exit; | |
45 | int initialized; | |
46 | Audiodev *dev; | |
47 | SDL_AudioDeviceID devid; | |
48 | } SDLVoiceOut; | |
49 | ||
50 | typedef struct SDLVoiceIn { | |
51 | HWVoiceIn hw; | |
52 | int exit; | |
53 | int initialized; | |
54 | Audiodev *dev; | |
55 | SDL_AudioDeviceID devid; | |
56 | } SDLVoiceIn; | |
57 | ||
58 | static void G_GNUC_PRINTF (1, 2) sdl_logerr (const char *fmt, ...) | |
59 | { | |
60 | va_list ap; | |
61 | ||
62 | va_start (ap, fmt); | |
63 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
64 | va_end (ap); | |
65 | ||
66 | AUD_log (AUDIO_CAP, "Reason: %s\n", SDL_GetError ()); | |
67 | } | |
68 | ||
69 | static int aud_to_sdlfmt (AudioFormat fmt) | |
70 | { | |
71 | switch (fmt) { | |
72 | case AUDIO_FORMAT_S8: | |
73 | return AUDIO_S8; | |
74 | ||
75 | case AUDIO_FORMAT_U8: | |
76 | return AUDIO_U8; | |
77 | ||
78 | case AUDIO_FORMAT_S16: | |
79 | return AUDIO_S16LSB; | |
80 | ||
81 | case AUDIO_FORMAT_U16: | |
82 | return AUDIO_U16LSB; | |
83 | ||
84 | case AUDIO_FORMAT_S32: | |
85 | return AUDIO_S32LSB; | |
86 | ||
87 | /* no unsigned 32-bit support in SDL */ | |
88 | ||
89 | case AUDIO_FORMAT_F32: | |
90 | return AUDIO_F32LSB; | |
91 | ||
92 | default: | |
93 | dolog ("Internal logic error: Bad audio format %d\n", fmt); | |
94 | #ifdef DEBUG_AUDIO | |
95 | abort (); | |
96 | #endif | |
97 | return AUDIO_U8; | |
98 | } | |
99 | } | |
100 | ||
101 | static int sdl_to_audfmt(int sdlfmt, AudioFormat *fmt, int *endianness) | |
102 | { | |
103 | switch (sdlfmt) { | |
104 | case AUDIO_S8: | |
105 | *endianness = 0; | |
106 | *fmt = AUDIO_FORMAT_S8; | |
107 | break; | |
108 | ||
109 | case AUDIO_U8: | |
110 | *endianness = 0; | |
111 | *fmt = AUDIO_FORMAT_U8; | |
112 | break; | |
113 | ||
114 | case AUDIO_S16LSB: | |
115 | *endianness = 0; | |
116 | *fmt = AUDIO_FORMAT_S16; | |
117 | break; | |
118 | ||
119 | case AUDIO_U16LSB: | |
120 | *endianness = 0; | |
121 | *fmt = AUDIO_FORMAT_U16; | |
122 | break; | |
123 | ||
124 | case AUDIO_S16MSB: | |
125 | *endianness = 1; | |
126 | *fmt = AUDIO_FORMAT_S16; | |
127 | break; | |
128 | ||
129 | case AUDIO_U16MSB: | |
130 | *endianness = 1; | |
131 | *fmt = AUDIO_FORMAT_U16; | |
132 | break; | |
133 | ||
134 | case AUDIO_S32LSB: | |
135 | *endianness = 0; | |
136 | *fmt = AUDIO_FORMAT_S32; | |
137 | break; | |
138 | ||
139 | case AUDIO_S32MSB: | |
140 | *endianness = 1; | |
141 | *fmt = AUDIO_FORMAT_S32; | |
142 | break; | |
143 | ||
144 | case AUDIO_F32LSB: | |
145 | *endianness = 0; | |
146 | *fmt = AUDIO_FORMAT_F32; | |
147 | break; | |
148 | ||
149 | case AUDIO_F32MSB: | |
150 | *endianness = 1; | |
151 | *fmt = AUDIO_FORMAT_F32; | |
152 | break; | |
153 | ||
154 | default: | |
155 | dolog ("Unrecognized SDL audio format %d\n", sdlfmt); | |
156 | return -1; | |
157 | } | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static SDL_AudioDeviceID sdl_open(SDL_AudioSpec *req, SDL_AudioSpec *obt, | |
163 | int rec) | |
164 | { | |
165 | SDL_AudioDeviceID devid; | |
166 | #ifndef _WIN32 | |
167 | int err; | |
168 | sigset_t new, old; | |
169 | ||
170 | /* Make sure potential threads created by SDL don't hog signals. */ | |
171 | err = sigfillset (&new); | |
172 | if (err) { | |
173 | dolog ("sdl_open: sigfillset failed: %s\n", strerror (errno)); | |
174 | return 0; | |
175 | } | |
176 | err = pthread_sigmask (SIG_BLOCK, &new, &old); | |
177 | if (err) { | |
178 | dolog ("sdl_open: pthread_sigmask failed: %s\n", strerror (err)); | |
179 | return 0; | |
180 | } | |
181 | #endif | |
182 | ||
183 | devid = SDL_OpenAudioDevice(NULL, rec, req, obt, 0); | |
184 | if (!devid) { | |
185 | sdl_logerr("SDL_OpenAudioDevice for %s failed\n", | |
186 | rec ? "recording" : "playback"); | |
187 | } | |
188 | ||
189 | #ifndef _WIN32 | |
190 | err = pthread_sigmask (SIG_SETMASK, &old, NULL); | |
191 | if (err) { | |
192 | dolog ("sdl_open: pthread_sigmask (restore) failed: %s\n", | |
193 | strerror (errno)); | |
194 | /* We have failed to restore original signal mask, all bets are off, | |
195 | so exit the process */ | |
196 | exit (EXIT_FAILURE); | |
197 | } | |
198 | #endif | |
199 | return devid; | |
200 | } | |
201 | ||
202 | static void sdl_close_out(SDLVoiceOut *sdl) | |
203 | { | |
204 | if (sdl->initialized) { | |
205 | SDL_LockAudioDevice(sdl->devid); | |
206 | sdl->exit = 1; | |
207 | SDL_UnlockAudioDevice(sdl->devid); | |
208 | SDL_PauseAudioDevice(sdl->devid, 1); | |
209 | sdl->initialized = 0; | |
210 | } | |
211 | if (sdl->devid) { | |
212 | SDL_CloseAudioDevice(sdl->devid); | |
213 | sdl->devid = 0; | |
214 | } | |
215 | } | |
216 | ||
217 | static void sdl_callback_out(void *opaque, Uint8 *buf, int len) | |
218 | { | |
219 | SDLVoiceOut *sdl = opaque; | |
220 | HWVoiceOut *hw = &sdl->hw; | |
221 | ||
222 | if (!sdl->exit) { | |
223 | ||
224 | /* dolog("callback_out: len=%d avail=%zu\n", len, hw->pending_emul); */ | |
225 | ||
226 | while (hw->pending_emul && len) { | |
227 | size_t write_len, start; | |
228 | ||
229 | start = audio_ring_posb(hw->pos_emul, hw->pending_emul, | |
230 | hw->size_emul); | |
231 | assert(start < hw->size_emul); | |
232 | ||
233 | write_len = MIN(MIN(hw->pending_emul, len), | |
234 | hw->size_emul - start); | |
235 | ||
236 | memcpy(buf, hw->buf_emul + start, write_len); | |
237 | hw->pending_emul -= write_len; | |
238 | len -= write_len; | |
239 | buf += write_len; | |
240 | } | |
241 | } | |
242 | ||
243 | /* clear remaining buffer that we couldn't fill with data */ | |
244 | if (len) { | |
245 | audio_pcm_info_clear_buf(&hw->info, buf, | |
246 | len / hw->info.bytes_per_frame); | |
247 | } | |
248 | } | |
249 | ||
250 | static void sdl_close_in(SDLVoiceIn *sdl) | |
251 | { | |
252 | if (sdl->initialized) { | |
253 | SDL_LockAudioDevice(sdl->devid); | |
254 | sdl->exit = 1; | |
255 | SDL_UnlockAudioDevice(sdl->devid); | |
256 | SDL_PauseAudioDevice(sdl->devid, 1); | |
257 | sdl->initialized = 0; | |
258 | } | |
259 | if (sdl->devid) { | |
260 | SDL_CloseAudioDevice(sdl->devid); | |
261 | sdl->devid = 0; | |
262 | } | |
263 | } | |
264 | ||
265 | static void sdl_callback_in(void *opaque, Uint8 *buf, int len) | |
266 | { | |
267 | SDLVoiceIn *sdl = opaque; | |
268 | HWVoiceIn *hw = &sdl->hw; | |
269 | ||
270 | if (sdl->exit) { | |
271 | return; | |
272 | } | |
273 | ||
274 | /* dolog("callback_in: len=%d pending=%zu\n", len, hw->pending_emul); */ | |
275 | ||
276 | while (hw->pending_emul < hw->size_emul && len) { | |
277 | size_t read_len = MIN(len, MIN(hw->size_emul - hw->pos_emul, | |
278 | hw->size_emul - hw->pending_emul)); | |
279 | ||
280 | memcpy(hw->buf_emul + hw->pos_emul, buf, read_len); | |
281 | ||
282 | hw->pending_emul += read_len; | |
283 | hw->pos_emul = (hw->pos_emul + read_len) % hw->size_emul; | |
284 | len -= read_len; | |
285 | buf += read_len; | |
286 | } | |
287 | } | |
288 | ||
289 | #define SDL_WRAPPER_FUNC(name, ret_type, args_decl, args, dir) \ | |
290 | static ret_type glue(sdl_, name)args_decl \ | |
291 | { \ | |
292 | ret_type ret; \ | |
293 | glue(SDLVoice, dir) *sdl = (glue(SDLVoice, dir) *)hw; \ | |
294 | \ | |
295 | SDL_LockAudioDevice(sdl->devid); \ | |
296 | ret = glue(audio_generic_, name)args; \ | |
297 | SDL_UnlockAudioDevice(sdl->devid); \ | |
298 | \ | |
299 | return ret; \ | |
300 | } | |
301 | ||
302 | #define SDL_WRAPPER_VOID_FUNC(name, args_decl, args, dir) \ | |
303 | static void glue(sdl_, name)args_decl \ | |
304 | { \ | |
305 | glue(SDLVoice, dir) *sdl = (glue(SDLVoice, dir) *)hw; \ | |
306 | \ | |
307 | SDL_LockAudioDevice(sdl->devid); \ | |
308 | glue(audio_generic_, name)args; \ | |
309 | SDL_UnlockAudioDevice(sdl->devid); \ | |
310 | } | |
311 | ||
312 | SDL_WRAPPER_FUNC(buffer_get_free, size_t, (HWVoiceOut *hw), (hw), Out) | |
313 | SDL_WRAPPER_FUNC(get_buffer_out, void *, (HWVoiceOut *hw, size_t *size), | |
314 | (hw, size), Out) | |
315 | SDL_WRAPPER_FUNC(put_buffer_out, size_t, | |
316 | (HWVoiceOut *hw, void *buf, size_t size), (hw, buf, size), Out) | |
317 | SDL_WRAPPER_FUNC(write, size_t, | |
318 | (HWVoiceOut *hw, void *buf, size_t size), (hw, buf, size), Out) | |
319 | SDL_WRAPPER_FUNC(read, size_t, (HWVoiceIn *hw, void *buf, size_t size), | |
320 | (hw, buf, size), In) | |
321 | SDL_WRAPPER_FUNC(get_buffer_in, void *, (HWVoiceIn *hw, size_t *size), | |
322 | (hw, size), In) | |
323 | SDL_WRAPPER_VOID_FUNC(put_buffer_in, (HWVoiceIn *hw, void *buf, size_t size), | |
324 | (hw, buf, size), In) | |
325 | #undef SDL_WRAPPER_FUNC | |
326 | #undef SDL_WRAPPER_VOID_FUNC | |
327 | ||
328 | static void sdl_fini_out(HWVoiceOut *hw) | |
329 | { | |
330 | SDLVoiceOut *sdl = (SDLVoiceOut *)hw; | |
331 | ||
332 | sdl_close_out(sdl); | |
333 | } | |
334 | ||
335 | static int sdl_init_out(HWVoiceOut *hw, struct audsettings *as, | |
336 | void *drv_opaque) | |
337 | { | |
338 | SDLVoiceOut *sdl = (SDLVoiceOut *)hw; | |
339 | SDL_AudioSpec req, obt; | |
340 | int endianness; | |
341 | int err; | |
342 | AudioFormat effective_fmt; | |
343 | Audiodev *dev = drv_opaque; | |
344 | AudiodevSdlPerDirectionOptions *spdo = dev->u.sdl.out; | |
345 | struct audsettings obt_as; | |
346 | ||
347 | req.freq = as->freq; | |
348 | req.format = aud_to_sdlfmt (as->fmt); | |
349 | req.channels = as->nchannels; | |
350 | /* SDL samples are QEMU frames */ | |
351 | req.samples = audio_buffer_frames( | |
352 | qapi_AudiodevSdlPerDirectionOptions_base(spdo), as, 11610); | |
353 | req.callback = sdl_callback_out; | |
354 | req.userdata = sdl; | |
355 | ||
356 | sdl->dev = dev; | |
357 | sdl->devid = sdl_open(&req, &obt, 0); | |
358 | if (!sdl->devid) { | |
359 | return -1; | |
360 | } | |
361 | ||
362 | err = sdl_to_audfmt(obt.format, &effective_fmt, &endianness); | |
363 | if (err) { | |
364 | sdl_close_out(sdl); | |
365 | return -1; | |
366 | } | |
367 | ||
368 | obt_as.freq = obt.freq; | |
369 | obt_as.nchannels = obt.channels; | |
370 | obt_as.fmt = effective_fmt; | |
371 | obt_as.endianness = endianness; | |
372 | ||
373 | audio_pcm_init_info (&hw->info, &obt_as); | |
374 | hw->samples = (spdo->has_buffer_count ? spdo->buffer_count : 4) * | |
375 | obt.samples; | |
376 | ||
377 | sdl->initialized = 1; | |
378 | sdl->exit = 0; | |
379 | return 0; | |
380 | } | |
381 | ||
382 | static void sdl_enable_out(HWVoiceOut *hw, bool enable) | |
383 | { | |
384 | SDLVoiceOut *sdl = (SDLVoiceOut *)hw; | |
385 | ||
386 | SDL_PauseAudioDevice(sdl->devid, !enable); | |
387 | } | |
388 | ||
389 | static void sdl_fini_in(HWVoiceIn *hw) | |
390 | { | |
391 | SDLVoiceIn *sdl = (SDLVoiceIn *)hw; | |
392 | ||
393 | sdl_close_in(sdl); | |
394 | } | |
395 | ||
396 | static int sdl_init_in(HWVoiceIn *hw, audsettings *as, void *drv_opaque) | |
397 | { | |
398 | SDLVoiceIn *sdl = (SDLVoiceIn *)hw; | |
399 | SDL_AudioSpec req, obt; | |
400 | int endianness; | |
401 | int err; | |
402 | AudioFormat effective_fmt; | |
403 | Audiodev *dev = drv_opaque; | |
404 | AudiodevSdlPerDirectionOptions *spdo = dev->u.sdl.in; | |
405 | struct audsettings obt_as; | |
406 | ||
407 | req.freq = as->freq; | |
408 | req.format = aud_to_sdlfmt(as->fmt); | |
409 | req.channels = as->nchannels; | |
410 | /* SDL samples are QEMU frames */ | |
411 | req.samples = audio_buffer_frames( | |
412 | qapi_AudiodevSdlPerDirectionOptions_base(spdo), as, 11610); | |
413 | req.callback = sdl_callback_in; | |
414 | req.userdata = sdl; | |
415 | ||
416 | sdl->dev = dev; | |
417 | sdl->devid = sdl_open(&req, &obt, 1); | |
418 | if (!sdl->devid) { | |
419 | return -1; | |
420 | } | |
421 | ||
422 | err = sdl_to_audfmt(obt.format, &effective_fmt, &endianness); | |
423 | if (err) { | |
424 | sdl_close_in(sdl); | |
425 | return -1; | |
426 | } | |
427 | ||
428 | obt_as.freq = obt.freq; | |
429 | obt_as.nchannels = obt.channels; | |
430 | obt_as.fmt = effective_fmt; | |
431 | obt_as.endianness = endianness; | |
432 | ||
433 | audio_pcm_init_info(&hw->info, &obt_as); | |
434 | hw->samples = (spdo->has_buffer_count ? spdo->buffer_count : 4) * | |
435 | obt.samples; | |
436 | hw->size_emul = hw->samples * hw->info.bytes_per_frame; | |
437 | hw->buf_emul = g_malloc(hw->size_emul); | |
438 | hw->pos_emul = hw->pending_emul = 0; | |
439 | ||
440 | sdl->initialized = 1; | |
441 | sdl->exit = 0; | |
442 | return 0; | |
443 | } | |
444 | ||
445 | static void sdl_enable_in(HWVoiceIn *hw, bool enable) | |
446 | { | |
447 | SDLVoiceIn *sdl = (SDLVoiceIn *)hw; | |
448 | ||
449 | SDL_PauseAudioDevice(sdl->devid, !enable); | |
450 | } | |
451 | ||
452 | static void *sdl_audio_init(Audiodev *dev) | |
453 | { | |
454 | if (SDL_InitSubSystem (SDL_INIT_AUDIO)) { | |
455 | sdl_logerr ("SDL failed to initialize audio subsystem\n"); | |
456 | return NULL; | |
457 | } | |
458 | ||
459 | return dev; | |
460 | } | |
461 | ||
462 | static void sdl_audio_fini (void *opaque) | |
463 | { | |
464 | SDL_QuitSubSystem (SDL_INIT_AUDIO); | |
465 | } | |
466 | ||
467 | static struct audio_pcm_ops sdl_pcm_ops = { | |
468 | .init_out = sdl_init_out, | |
469 | .fini_out = sdl_fini_out, | |
470 | /* wrapper for audio_generic_write */ | |
471 | .write = sdl_write, | |
472 | /* wrapper for audio_generic_buffer_get_free */ | |
473 | .buffer_get_free = sdl_buffer_get_free, | |
474 | /* wrapper for audio_generic_get_buffer_out */ | |
475 | .get_buffer_out = sdl_get_buffer_out, | |
476 | /* wrapper for audio_generic_put_buffer_out */ | |
477 | .put_buffer_out = sdl_put_buffer_out, | |
478 | .enable_out = sdl_enable_out, | |
479 | .init_in = sdl_init_in, | |
480 | .fini_in = sdl_fini_in, | |
481 | /* wrapper for audio_generic_read */ | |
482 | .read = sdl_read, | |
483 | /* wrapper for audio_generic_get_buffer_in */ | |
484 | .get_buffer_in = sdl_get_buffer_in, | |
485 | /* wrapper for audio_generic_put_buffer_in */ | |
486 | .put_buffer_in = sdl_put_buffer_in, | |
487 | .enable_in = sdl_enable_in, | |
488 | }; | |
489 | ||
490 | static struct audio_driver sdl_audio_driver = { | |
491 | .name = "sdl", | |
492 | .descr = "SDL http://www.libsdl.org", | |
493 | .init = sdl_audio_init, | |
494 | .fini = sdl_audio_fini, | |
495 | .pcm_ops = &sdl_pcm_ops, | |
496 | .can_be_default = 1, | |
497 | .max_voices_out = INT_MAX, | |
498 | .max_voices_in = INT_MAX, | |
499 | .voice_size_out = sizeof(SDLVoiceOut), | |
500 | .voice_size_in = sizeof(SDLVoiceIn), | |
501 | }; | |
502 | ||
503 | static void register_audio_sdl(void) | |
504 | { | |
505 | audio_driver_register(&sdl_audio_driver); | |
506 | } | |
507 | type_init(register_audio_sdl); |