xref: /openbmc/qemu/audio/audio_template.h (revision 5c63d141)
1 /*
2  * QEMU Audio subsystem header
3  *
4  * Copyright (c) 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 #ifdef DAC
26 #define NAME "playback"
27 #define HWBUF hw->mix_buf
28 #define TYPE out
29 #define HW HWVoiceOut
30 #define SW SWVoiceOut
31 #else
32 #define NAME "capture"
33 #define TYPE in
34 #define HW HWVoiceIn
35 #define SW SWVoiceIn
36 #define HWBUF hw->conv_buf
37 #endif
38 
glue(audio_init_nb_voices_,TYPE)39 static void glue(audio_init_nb_voices_, TYPE)(AudioState *s,
40                                               struct audio_driver *drv, int min_voices)
41 {
42     int max_voices = glue (drv->max_voices_, TYPE);
43     size_t voice_size = glue(drv->voice_size_, TYPE);
44 
45     glue (s->nb_hw_voices_, TYPE) = glue(audio_get_pdo_, TYPE)(s->dev)->voices;
46     if (glue (s->nb_hw_voices_, TYPE) > max_voices) {
47         if (!max_voices) {
48 #ifdef DAC
49             dolog ("Driver `%s' does not support " NAME "\n", drv->name);
50 #endif
51         } else {
52             dolog ("Driver `%s' does not support %d " NAME " voices, max %d\n",
53                    drv->name,
54                    glue (s->nb_hw_voices_, TYPE),
55                    max_voices);
56         }
57         glue (s->nb_hw_voices_, TYPE) = max_voices;
58     }
59 
60     if (glue (s->nb_hw_voices_, TYPE) < min_voices) {
61         dolog ("Bogus number of " NAME " voices %d, setting to %d\n",
62                glue (s->nb_hw_voices_, TYPE),
63                min_voices);
64     }
65 
66     if (audio_bug(__func__, !voice_size && max_voices)) {
67         dolog ("drv=`%s' voice_size=0 max_voices=%d\n",
68                drv->name, max_voices);
69         glue (s->nb_hw_voices_, TYPE) = 0;
70     }
71 
72     if (audio_bug(__func__, voice_size && !max_voices)) {
73         dolog("drv=`%s' voice_size=%zu max_voices=0\n",
74               drv->name, voice_size);
75     }
76 }
77 
glue(audio_pcm_hw_free_resources_,TYPE)78 static void glue (audio_pcm_hw_free_resources_, TYPE) (HW *hw)
79 {
80     g_free(hw->buf_emul);
81     g_free(HWBUF.buffer);
82     HWBUF.buffer = NULL;
83     HWBUF.size = 0;
84 }
85 
glue(audio_pcm_hw_alloc_resources_,TYPE)86 static void glue(audio_pcm_hw_alloc_resources_, TYPE)(HW *hw)
87 {
88     if (glue(audio_get_pdo_, TYPE)(hw->s->dev)->mixing_engine) {
89         size_t samples = hw->samples;
90         if (audio_bug(__func__, samples == 0)) {
91             dolog("Attempted to allocate empty buffer\n");
92         }
93 
94         HWBUF.buffer = g_new0(st_sample, samples);
95         HWBUF.size = samples;
96         HWBUF.pos = 0;
97     } else {
98         HWBUF.buffer = NULL;
99         HWBUF.size = 0;
100     }
101 }
102 
glue(audio_pcm_sw_free_resources_,TYPE)103 static void glue (audio_pcm_sw_free_resources_, TYPE) (SW *sw)
104 {
105     g_free(sw->resample_buf.buffer);
106     sw->resample_buf.buffer = NULL;
107     sw->resample_buf.size = 0;
108 
109     if (sw->rate) {
110         st_rate_stop (sw->rate);
111     }
112     sw->rate = NULL;
113 }
114 
glue(audio_pcm_sw_alloc_resources_,TYPE)115 static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw)
116 {
117     HW *hw = sw->hw;
118     uint64_t samples;
119 
120     if (!glue(audio_get_pdo_, TYPE)(sw->s->dev)->mixing_engine) {
121         return 0;
122     }
123 
124     samples = muldiv64(HWBUF.size, sw->info.freq, hw->info.freq);
125     if (samples == 0) {
126         uint64_t f_fe_min;
127         uint64_t f_be = (uint32_t)hw->info.freq;
128 
129         /* f_fe_min = ceil(1 [frames] * f_be [Hz] / size_be [frames]) */
130         f_fe_min = (f_be + HWBUF.size - 1) / HWBUF.size;
131         qemu_log_mask(LOG_UNIMP,
132                       AUDIO_CAP ": The guest selected a " NAME " sample rate"
133                       " of %d Hz for %s. Only sample rates >= %" PRIu64 " Hz"
134                       " are supported.\n",
135                       sw->info.freq, sw->name, f_fe_min);
136         return -1;
137     }
138 
139     /*
140      * Allocate one additional audio frame that is needed for upsampling
141      * if the resample buffer size is small. For large buffer sizes take
142      * care of overflows and truncation.
143      */
144     samples = samples < SIZE_MAX ? samples + 1 : SIZE_MAX;
145     sw->resample_buf.buffer = g_new0(st_sample, samples);
146     sw->resample_buf.size = samples;
147     sw->resample_buf.pos = 0;
148 
149 #ifdef DAC
150     sw->rate = st_rate_start(sw->info.freq, hw->info.freq);
151 #else
152     sw->rate = st_rate_start(hw->info.freq, sw->info.freq);
153 #endif
154 
155     return 0;
156 }
157 
glue(audio_pcm_sw_init_,TYPE)158 static int glue (audio_pcm_sw_init_, TYPE) (
159     SW *sw,
160     HW *hw,
161     const char *name,
162     struct audsettings *as
163     )
164 {
165     int err;
166 
167     audio_pcm_init_info (&sw->info, as);
168     sw->hw = hw;
169     sw->active = 0;
170 #ifdef DAC
171     sw->total_hw_samples_mixed = 0;
172     sw->empty = 1;
173 #endif
174 
175     if (sw->info.is_float) {
176 #ifdef DAC
177         sw->conv = mixeng_conv_float[sw->info.nchannels == 2];
178 #else
179         sw->clip = mixeng_clip_float[sw->info.nchannels == 2];
180 #endif
181     } else {
182 #ifdef DAC
183         sw->conv = mixeng_conv
184 #else
185         sw->clip = mixeng_clip
186 #endif
187             [sw->info.nchannels == 2]
188             [sw->info.is_signed]
189             [sw->info.swap_endianness]
190             [audio_bits_to_index(sw->info.bits)];
191     }
192 
193     sw->name = g_strdup (name);
194     err = glue (audio_pcm_sw_alloc_resources_, TYPE) (sw);
195     if (err) {
196         g_free (sw->name);
197         sw->name = NULL;
198     }
199     return err;
200 }
201 
glue(audio_pcm_sw_fini_,TYPE)202 static void glue (audio_pcm_sw_fini_, TYPE) (SW *sw)
203 {
204     glue (audio_pcm_sw_free_resources_, TYPE) (sw);
205     g_free (sw->name);
206     sw->name = NULL;
207 }
208 
glue(audio_pcm_hw_add_sw_,TYPE)209 static void glue (audio_pcm_hw_add_sw_, TYPE) (HW *hw, SW *sw)
210 {
211     QLIST_INSERT_HEAD (&hw->sw_head, sw, entries);
212 }
213 
glue(audio_pcm_hw_del_sw_,TYPE)214 static void glue (audio_pcm_hw_del_sw_, TYPE) (SW *sw)
215 {
216     QLIST_REMOVE (sw, entries);
217 }
218 
glue(audio_pcm_hw_gc_,TYPE)219 static void glue (audio_pcm_hw_gc_, TYPE) (HW **hwp)
220 {
221     HW *hw = *hwp;
222     AudioState *s = hw->s;
223 
224     if (!hw->sw_head.lh_first) {
225 #ifdef DAC
226         audio_detach_capture(hw);
227 #endif
228         QLIST_REMOVE(hw, entries);
229         glue(hw->pcm_ops->fini_, TYPE) (hw);
230         glue(s->nb_hw_voices_, TYPE) += 1;
231         glue(audio_pcm_hw_free_resources_ , TYPE) (hw);
232         g_free(hw);
233         *hwp = NULL;
234     }
235 }
236 
glue(audio_pcm_hw_find_any_,TYPE)237 static HW *glue(audio_pcm_hw_find_any_, TYPE)(AudioState *s, HW *hw)
238 {
239     return hw ? hw->entries.le_next : glue (s->hw_head_, TYPE).lh_first;
240 }
241 
glue(audio_pcm_hw_find_any_enabled_,TYPE)242 static HW *glue(audio_pcm_hw_find_any_enabled_, TYPE)(AudioState *s, HW *hw)
243 {
244     while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, hw))) {
245         if (hw->enabled) {
246             return hw;
247         }
248     }
249     return NULL;
250 }
251 
glue(audio_pcm_hw_find_specific_,TYPE)252 static HW *glue(audio_pcm_hw_find_specific_, TYPE)(AudioState *s, HW *hw,
253                                                    struct audsettings *as)
254 {
255     while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, hw))) {
256         if (audio_pcm_info_eq (&hw->info, as)) {
257             return hw;
258         }
259     }
260     return NULL;
261 }
262 
glue(audio_pcm_hw_add_new_,TYPE)263 static HW *glue(audio_pcm_hw_add_new_, TYPE)(AudioState *s,
264                                              struct audsettings *as)
265 {
266     HW *hw;
267     struct audio_driver *drv = s->drv;
268 
269     if (!glue (s->nb_hw_voices_, TYPE)) {
270         return NULL;
271     }
272 
273     if (audio_bug(__func__, !drv)) {
274         dolog ("No host audio driver\n");
275         return NULL;
276     }
277 
278     if (audio_bug(__func__, !drv->pcm_ops)) {
279         dolog ("Host audio driver without pcm_ops\n");
280         return NULL;
281     }
282 
283     /*
284      * Since glue(s->nb_hw_voices_, TYPE) is != 0, glue(drv->voice_size_, TYPE)
285      * is guaranteed to be != 0. See the audio_init_nb_voices_* functions.
286      */
287     hw = g_malloc0(glue(drv->voice_size_, TYPE));
288     hw->s = s;
289     hw->pcm_ops = drv->pcm_ops;
290 
291     QLIST_INIT (&hw->sw_head);
292 #ifdef DAC
293     QLIST_INIT (&hw->cap_head);
294 #endif
295     if (glue (hw->pcm_ops->init_, TYPE) (hw, as, s->drv_opaque)) {
296         goto err0;
297     }
298 
299     if (audio_bug(__func__, hw->samples <= 0)) {
300         dolog("hw->samples=%zd\n", hw->samples);
301         goto err1;
302     }
303 
304     if (hw->info.is_float) {
305 #ifdef DAC
306         hw->clip = mixeng_clip_float[hw->info.nchannels == 2];
307 #else
308         hw->conv = mixeng_conv_float[hw->info.nchannels == 2];
309 #endif
310     } else {
311 #ifdef DAC
312         hw->clip = mixeng_clip
313 #else
314         hw->conv = mixeng_conv
315 #endif
316             [hw->info.nchannels == 2]
317             [hw->info.is_signed]
318             [hw->info.swap_endianness]
319             [audio_bits_to_index(hw->info.bits)];
320     }
321 
322     glue(audio_pcm_hw_alloc_resources_, TYPE)(hw);
323 
324     QLIST_INSERT_HEAD (&s->glue (hw_head_, TYPE), hw, entries);
325     glue (s->nb_hw_voices_, TYPE) -= 1;
326 #ifdef DAC
327     audio_attach_capture (hw);
328 #endif
329     return hw;
330 
331  err1:
332     glue (hw->pcm_ops->fini_, TYPE) (hw);
333  err0:
334     g_free (hw);
335     return NULL;
336 }
337 
glue(audio_get_pdo_,TYPE)338 AudiodevPerDirectionOptions *glue(audio_get_pdo_, TYPE)(Audiodev *dev)
339 {
340     switch (dev->driver) {
341     case AUDIODEV_DRIVER_NONE:
342         return dev->u.none.TYPE;
343 #ifdef CONFIG_AUDIO_ALSA
344     case AUDIODEV_DRIVER_ALSA:
345         return qapi_AudiodevAlsaPerDirectionOptions_base(dev->u.alsa.TYPE);
346 #endif
347 #ifdef CONFIG_AUDIO_COREAUDIO
348     case AUDIODEV_DRIVER_COREAUDIO:
349         return qapi_AudiodevCoreaudioPerDirectionOptions_base(
350             dev->u.coreaudio.TYPE);
351 #endif
352 #ifdef CONFIG_DBUS_DISPLAY
353     case AUDIODEV_DRIVER_DBUS:
354         return dev->u.dbus.TYPE;
355 #endif
356 #ifdef CONFIG_AUDIO_DSOUND
357     case AUDIODEV_DRIVER_DSOUND:
358         return dev->u.dsound.TYPE;
359 #endif
360 #ifdef CONFIG_AUDIO_JACK
361     case AUDIODEV_DRIVER_JACK:
362         return qapi_AudiodevJackPerDirectionOptions_base(dev->u.jack.TYPE);
363 #endif
364 #ifdef CONFIG_AUDIO_OSS
365     case AUDIODEV_DRIVER_OSS:
366         return qapi_AudiodevOssPerDirectionOptions_base(dev->u.oss.TYPE);
367 #endif
368 #ifdef CONFIG_AUDIO_PA
369     case AUDIODEV_DRIVER_PA:
370         return qapi_AudiodevPaPerDirectionOptions_base(dev->u.pa.TYPE);
371 #endif
372 #ifdef CONFIG_AUDIO_PIPEWIRE
373     case AUDIODEV_DRIVER_PIPEWIRE:
374         return qapi_AudiodevPipewirePerDirectionOptions_base(dev->u.pipewire.TYPE);
375 #endif
376 #ifdef CONFIG_AUDIO_SDL
377     case AUDIODEV_DRIVER_SDL:
378         return qapi_AudiodevSdlPerDirectionOptions_base(dev->u.sdl.TYPE);
379 #endif
380 #ifdef CONFIG_AUDIO_SNDIO
381     case AUDIODEV_DRIVER_SNDIO:
382         return dev->u.sndio.TYPE;
383 #endif
384 #ifdef CONFIG_SPICE
385     case AUDIODEV_DRIVER_SPICE:
386         return dev->u.spice.TYPE;
387 #endif
388     case AUDIODEV_DRIVER_WAV:
389         return dev->u.wav.TYPE;
390 
391     case AUDIODEV_DRIVER__MAX:
392         break;
393     }
394     abort();
395 }
396 
glue(audio_pcm_hw_add_,TYPE)397 static HW *glue(audio_pcm_hw_add_, TYPE)(AudioState *s, struct audsettings *as)
398 {
399     HW *hw;
400     AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
401 
402     if (!pdo->mixing_engine || pdo->fixed_settings) {
403         hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as);
404         if (!pdo->mixing_engine || hw) {
405             return hw;
406         }
407     }
408 
409     hw = glue(audio_pcm_hw_find_specific_, TYPE)(s, NULL, as);
410     if (hw) {
411         return hw;
412     }
413 
414     hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as);
415     if (hw) {
416         return hw;
417     }
418 
419     return glue(audio_pcm_hw_find_any_, TYPE)(s, NULL);
420 }
421 
glue(audio_pcm_create_voice_pair_,TYPE)422 static SW *glue(audio_pcm_create_voice_pair_, TYPE)(
423     AudioState *s,
424     const char *sw_name,
425     struct audsettings *as
426     )
427 {
428     SW *sw;
429     HW *hw;
430     struct audsettings hw_as;
431     AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
432 
433     if (pdo->fixed_settings) {
434         hw_as = audiodev_to_audsettings(pdo);
435     } else {
436         hw_as = *as;
437     }
438 
439     sw = g_new0(SW, 1);
440     sw->s = s;
441 
442     hw = glue(audio_pcm_hw_add_, TYPE)(s, &hw_as);
443     if (!hw) {
444         dolog("Could not create a backend for voice `%s'\n", sw_name);
445         goto err1;
446     }
447 
448     glue (audio_pcm_hw_add_sw_, TYPE) (hw, sw);
449 
450     if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, sw_name, as)) {
451         goto err2;
452     }
453 
454     return sw;
455 
456 err2:
457     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
458     glue (audio_pcm_hw_gc_, TYPE) (&hw);
459 err1:
460     g_free(sw);
461     return NULL;
462 }
463 
glue(audio_close_,TYPE)464 static void glue (audio_close_, TYPE) (SW *sw)
465 {
466     glue (audio_pcm_sw_fini_, TYPE) (sw);
467     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
468     glue (audio_pcm_hw_gc_, TYPE) (&sw->hw);
469     g_free (sw);
470 }
471 
glue(AUD_close_,TYPE)472 void glue (AUD_close_, TYPE) (QEMUSoundCard *card, SW *sw)
473 {
474     if (sw) {
475         if (audio_bug(__func__, !card)) {
476             dolog ("card=%p\n", card);
477             return;
478         }
479 
480         glue (audio_close_, TYPE) (sw);
481     }
482 }
483 
glue(AUD_open_,TYPE)484 SW *glue (AUD_open_, TYPE) (
485     QEMUSoundCard *card,
486     SW *sw,
487     const char *name,
488     void *callback_opaque ,
489     audio_callback_fn callback_fn,
490     struct audsettings *as
491     )
492 {
493     AudioState *s;
494     AudiodevPerDirectionOptions *pdo;
495 
496     if (audio_bug(__func__, !card || !name || !callback_fn || !as)) {
497         dolog ("card=%p name=%p callback_fn=%p as=%p\n",
498                card, name, callback_fn, as);
499         goto fail;
500     }
501 
502     s = card->state;
503     pdo = glue(audio_get_pdo_, TYPE)(s->dev);
504 
505     ldebug ("open %s, freq %d, nchannels %d, fmt %d\n",
506             name, as->freq, as->nchannels, as->fmt);
507 
508     if (audio_bug(__func__, audio_validate_settings(as))) {
509         audio_print_settings (as);
510         goto fail;
511     }
512 
513     if (audio_bug(__func__, !s->drv)) {
514         dolog ("Can not open `%s' (no host audio driver)\n", name);
515         goto fail;
516     }
517 
518     if (sw && audio_pcm_info_eq (&sw->info, as)) {
519         return sw;
520     }
521 
522     if (!pdo->fixed_settings && sw) {
523         glue (AUD_close_, TYPE) (card, sw);
524         sw = NULL;
525     }
526 
527     if (sw) {
528         HW *hw = sw->hw;
529 
530         if (!hw) {
531             dolog("Internal logic error: voice `%s' has no backend\n",
532                   SW_NAME(sw));
533             goto fail;
534         }
535 
536         glue (audio_pcm_sw_fini_, TYPE) (sw);
537         if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, name, as)) {
538             goto fail;
539         }
540     } else {
541         sw = glue(audio_pcm_create_voice_pair_, TYPE)(s, name, as);
542         if (!sw) {
543             return NULL;
544         }
545     }
546 
547     sw->card = card;
548     sw->vol = nominal_volume;
549     sw->callback.fn = callback_fn;
550     sw->callback.opaque = callback_opaque;
551 
552 #ifdef DEBUG_AUDIO
553     dolog ("%s\n", name);
554     audio_pcm_print_info ("hw", &sw->hw->info);
555     audio_pcm_print_info ("sw", &sw->info);
556 #endif
557 
558     return sw;
559 
560  fail:
561     glue (AUD_close_, TYPE) (card, sw);
562     return NULL;
563 }
564 
glue(AUD_is_active_,TYPE)565 int glue (AUD_is_active_, TYPE) (SW *sw)
566 {
567     return sw ? sw->active : 0;
568 }
569 
glue(AUD_init_time_stamp_,TYPE)570 void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
571 {
572     if (!sw) {
573         return;
574     }
575 
576     ts->old_ts = sw->hw->ts_helper;
577 }
578 
glue(AUD_get_elapsed_usec_,TYPE)579 uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
580 {
581     uint64_t delta, cur_ts, old_ts;
582 
583     if (!sw) {
584         return 0;
585     }
586 
587     cur_ts = sw->hw->ts_helper;
588     old_ts = ts->old_ts;
589     /* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
590 
591     if (cur_ts >= old_ts) {
592         delta = cur_ts - old_ts;
593     } else {
594         delta = UINT64_MAX - old_ts + cur_ts;
595     }
596 
597     if (!delta) {
598         return 0;
599     }
600 
601     return muldiv64 (delta, sw->hw->info.freq, 1000000);
602 }
603 
604 #undef TYPE
605 #undef HW
606 #undef SW
607 #undef HWBUF
608 #undef NAME
609