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25#include "qemu/osdep.h"
26#include "qemu/module.h"
27#include "qemu/atomic.h"
28#include "qemu/main-loop.h"
29#include "qemu-common.h"
30#include "audio.h"
31
32#define AUDIO_CAP "jack"
33#include "audio_int.h"
34
35#include <jack/jack.h>
36#include <jack/thread.h>
37
38struct QJack;
39
40typedef enum QJackState {
41 QJACK_STATE_DISCONNECTED,
42 QJACK_STATE_RUNNING,
43 QJACK_STATE_SHUTDOWN
44}
45QJackState;
46
47typedef struct QJackBuffer {
48 int channels;
49 int frames;
50 uint32_t used;
51 int rptr, wptr;
52 float **data;
53}
54QJackBuffer;
55
56typedef struct QJackClient {
57 AudiodevJackPerDirectionOptions *opt;
58
59 bool out;
60 bool enabled;
61 bool connect_ports;
62 int packets;
63
64 QJackState state;
65 jack_client_t *client;
66 jack_nframes_t freq;
67 QEMUBH *shutdown_bh;
68
69 struct QJack *j;
70 int nchannels;
71 int buffersize;
72 jack_port_t **port;
73 QJackBuffer fifo;
74}
75QJackClient;
76
77typedef struct QJackOut {
78 HWVoiceOut hw;
79 QJackClient c;
80}
81QJackOut;
82
83typedef struct QJackIn {
84 HWVoiceIn hw;
85 QJackClient c;
86}
87QJackIn;
88
89static int qjack_client_init(QJackClient *c);
90static void qjack_client_connect_ports(QJackClient *c);
91static void qjack_client_fini(QJackClient *c);
92static QemuMutex qjack_shutdown_lock;
93
94static void qjack_buffer_create(QJackBuffer *buffer, int channels, int frames)
95{
96 buffer->channels = channels;
97 buffer->frames = frames;
98 buffer->used = 0;
99 buffer->rptr = 0;
100 buffer->wptr = 0;
101 buffer->data = g_malloc(channels * sizeof(float *));
102 for (int i = 0; i < channels; ++i) {
103 buffer->data[i] = g_malloc(frames * sizeof(float));
104 }
105}
106
107static void qjack_buffer_clear(QJackBuffer *buffer)
108{
109 assert(buffer->data);
110 qatomic_store_release(&buffer->used, 0);
111 buffer->rptr = 0;
112 buffer->wptr = 0;
113}
114
115static void qjack_buffer_free(QJackBuffer *buffer)
116{
117 if (!buffer->data) {
118 return;
119 }
120
121 for (int i = 0; i < buffer->channels; ++i) {
122 g_free(buffer->data[i]);
123 }
124
125 g_free(buffer->data);
126 buffer->data = NULL;
127}
128
129
130static int qjack_buffer_write(QJackBuffer *buffer, float *data, int size)
131{
132 assert(buffer->data);
133 const int samples = size / sizeof(float);
134 int frames = samples / buffer->channels;
135 const int avail = buffer->frames - qatomic_load_acquire(&buffer->used);
136
137 if (frames > avail) {
138 frames = avail;
139 }
140
141 int copy = frames;
142 int wptr = buffer->wptr;
143
144 while (copy) {
145
146 for (int c = 0; c < buffer->channels; ++c) {
147 buffer->data[c][wptr] = *data++;
148 }
149
150 if (++wptr == buffer->frames) {
151 wptr = 0;
152 }
153
154 --copy;
155 }
156
157 buffer->wptr = wptr;
158
159 qatomic_add(&buffer->used, frames);
160 return frames * buffer->channels * sizeof(float);
161};
162
163
164static int qjack_buffer_write_l(QJackBuffer *buffer, float **dest, int frames)
165{
166 assert(buffer->data);
167 const int avail = buffer->frames - qatomic_load_acquire(&buffer->used);
168 int wptr = buffer->wptr;
169
170 if (frames > avail) {
171 frames = avail;
172 }
173
174 int right = buffer->frames - wptr;
175 if (right > frames) {
176 right = frames;
177 }
178
179 const int left = frames - right;
180 for (int c = 0; c < buffer->channels; ++c) {
181 memcpy(buffer->data[c] + wptr, dest[c] , right * sizeof(float));
182 memcpy(buffer->data[c] , dest[c] + right, left * sizeof(float));
183 }
184
185 wptr += frames;
186 if (wptr >= buffer->frames) {
187 wptr -= buffer->frames;
188 }
189 buffer->wptr = wptr;
190
191 qatomic_add(&buffer->used, frames);
192 return frames;
193}
194
195
196static int qjack_buffer_read(QJackBuffer *buffer, float *dest, int size)
197{
198 assert(buffer->data);
199 const int samples = size / sizeof(float);
200 int frames = samples / buffer->channels;
201 const int avail = qatomic_load_acquire(&buffer->used);
202
203 if (frames > avail) {
204 frames = avail;
205 }
206
207 int copy = frames;
208 int rptr = buffer->rptr;
209
210 while (copy) {
211
212 for (int c = 0; c < buffer->channels; ++c) {
213 *dest++ = buffer->data[c][rptr];
214 }
215
216 if (++rptr == buffer->frames) {
217 rptr = 0;
218 }
219
220 --copy;
221 }
222
223 buffer->rptr = rptr;
224
225 qatomic_sub(&buffer->used, frames);
226 return frames * buffer->channels * sizeof(float);
227}
228
229
230static int qjack_buffer_read_l(QJackBuffer *buffer, float **dest, int frames)
231{
232 assert(buffer->data);
233 int copy = frames;
234 const int used = qatomic_load_acquire(&buffer->used);
235 int rptr = buffer->rptr;
236
237 if (copy > used) {
238 copy = used;
239 }
240
241 int right = buffer->frames - rptr;
242 if (right > copy) {
243 right = copy;
244 }
245
246 const int left = copy - right;
247 for (int c = 0; c < buffer->channels; ++c) {
248 memcpy(dest[c] , buffer->data[c] + rptr, right * sizeof(float));
249 memcpy(dest[c] + right, buffer->data[c] , left * sizeof(float));
250 }
251
252 rptr += copy;
253 if (rptr >= buffer->frames) {
254 rptr -= buffer->frames;
255 }
256 buffer->rptr = rptr;
257
258 qatomic_sub(&buffer->used, copy);
259 return copy;
260}
261
262static int qjack_process(jack_nframes_t nframes, void *arg)
263{
264 QJackClient *c = (QJackClient *)arg;
265
266 if (c->state != QJACK_STATE_RUNNING) {
267 return 0;
268 }
269
270
271 float *buffers[c->nchannels];
272 for (int i = 0; i < c->nchannels; ++i) {
273 buffers[i] = jack_port_get_buffer(c->port[i], nframes);
274 }
275
276 if (c->out) {
277 if (likely(c->enabled)) {
278 qjack_buffer_read_l(&c->fifo, buffers, nframes);
279 } else {
280 for (int i = 0; i < c->nchannels; ++i) {
281 memset(buffers[i], 0, nframes * sizeof(float));
282 }
283 }
284 } else {
285 if (likely(c->enabled)) {
286 qjack_buffer_write_l(&c->fifo, buffers, nframes);
287 }
288 }
289
290 return 0;
291}
292
293static void qjack_port_registration(jack_port_id_t port, int reg, void *arg)
294{
295 if (reg) {
296 QJackClient *c = (QJackClient *)arg;
297 c->connect_ports = true;
298 }
299}
300
301static int qjack_xrun(void *arg)
302{
303 QJackClient *c = (QJackClient *)arg;
304 if (c->state != QJACK_STATE_RUNNING) {
305 return 0;
306 }
307
308 qjack_buffer_clear(&c->fifo);
309 return 0;
310}
311
312static void qjack_shutdown_bh(void *opaque)
313{
314 QJackClient *c = (QJackClient *)opaque;
315 qjack_client_fini(c);
316}
317
318static void qjack_shutdown(void *arg)
319{
320 QJackClient *c = (QJackClient *)arg;
321 c->state = QJACK_STATE_SHUTDOWN;
322 qemu_bh_schedule(c->shutdown_bh);
323}
324
325static void qjack_client_recover(QJackClient *c)
326{
327 if (c->state != QJACK_STATE_DISCONNECTED) {
328 return;
329 }
330
331
332 if (c->packets % 100 == 0) {
333
334
335 if (c->enabled) {
336 dolog("attempting to reconnect to server\n");
337 qjack_client_init(c);
338 }
339 }
340}
341
342static size_t qjack_write(HWVoiceOut *hw, void *buf, size_t len)
343{
344 QJackOut *jo = (QJackOut *)hw;
345 ++jo->c.packets;
346
347 if (jo->c.state != QJACK_STATE_RUNNING) {
348 qjack_client_recover(&jo->c);
349 return len;
350 }
351
352 qjack_client_connect_ports(&jo->c);
353 return qjack_buffer_write(&jo->c.fifo, buf, len);
354}
355
356static size_t qjack_read(HWVoiceIn *hw, void *buf, size_t len)
357{
358 QJackIn *ji = (QJackIn *)hw;
359 ++ji->c.packets;
360
361 if (ji->c.state != QJACK_STATE_RUNNING) {
362 qjack_client_recover(&ji->c);
363 return len;
364 }
365
366 qjack_client_connect_ports(&ji->c);
367 return qjack_buffer_read(&ji->c.fifo, buf, len);
368}
369
370static void qjack_client_connect_ports(QJackClient *c)
371{
372 if (!c->connect_ports || !c->opt->connect_ports) {
373 return;
374 }
375
376 c->connect_ports = false;
377 const char **ports;
378 ports = jack_get_ports(c->client, c->opt->connect_ports, NULL,
379 c->out ? JackPortIsInput : JackPortIsOutput);
380
381 if (!ports) {
382 return;
383 }
384
385 for (int i = 0; i < c->nchannels && ports[i]; ++i) {
386 const char *p = jack_port_name(c->port[i]);
387 if (jack_port_connected_to(c->port[i], ports[i])) {
388 continue;
389 }
390
391 if (c->out) {
392 dolog("connect %s -> %s\n", p, ports[i]);
393 jack_connect(c->client, p, ports[i]);
394 } else {
395 dolog("connect %s -> %s\n", ports[i], p);
396 jack_connect(c->client, ports[i], p);
397 }
398 }
399}
400
401static int qjack_client_init(QJackClient *c)
402{
403 jack_status_t status;
404 char client_name[jack_client_name_size()];
405 jack_options_t options = JackNullOption;
406
407 if (c->state == QJACK_STATE_RUNNING) {
408 return 0;
409 }
410
411 c->connect_ports = true;
412
413 snprintf(client_name, sizeof(client_name), "%s-%s",
414 c->out ? "out" : "in",
415 c->opt->client_name ? c->opt->client_name : qemu_get_vm_name());
416
417 if (c->opt->exact_name) {
418 options |= JackUseExactName;
419 }
420
421 if (!c->opt->start_server) {
422 options |= JackNoStartServer;
423 }
424
425 if (c->opt->server_name) {
426 options |= JackServerName;
427 }
428
429 c->client = jack_client_open(client_name, options, &status,
430 c->opt->server_name);
431
432 if (c->client == NULL) {
433 dolog("jack_client_open failed: status = 0x%2.0x\n", status);
434 if (status & JackServerFailed) {
435 dolog("unable to connect to JACK server\n");
436 }
437 return -1;
438 }
439
440 c->freq = jack_get_sample_rate(c->client);
441
442 if (status & JackServerStarted) {
443 dolog("JACK server started\n");
444 }
445
446 if (status & JackNameNotUnique) {
447 dolog("JACK unique name assigned %s\n",
448 jack_get_client_name(c->client));
449 }
450
451 jack_set_process_callback(c->client, qjack_process , c);
452 jack_set_port_registration_callback(c->client, qjack_port_registration, c);
453 jack_set_xrun_callback(c->client, qjack_xrun, c);
454 jack_on_shutdown(c->client, qjack_shutdown, c);
455
456
457 c->port = g_malloc(sizeof(jack_port_t *) * c->nchannels);
458 for (int i = 0; i < c->nchannels; ++i) {
459
460 char port_name[16];
461 snprintf(
462 port_name,
463 sizeof(port_name),
464 c->out ? "output %d" : "input %d",
465 i);
466
467 c->port[i] = jack_port_register(
468 c->client,
469 port_name,
470 JACK_DEFAULT_AUDIO_TYPE,
471 c->out ? JackPortIsOutput : JackPortIsInput,
472 0);
473 }
474
475
476 jack_activate(c->client);
477 c->buffersize = jack_get_buffer_size(c->client);
478
479
480
481
482
483 if (c->buffersize < 512) {
484 c->buffersize = 512;
485 }
486
487
488 qjack_buffer_create(&c->fifo, c->nchannels, c->buffersize * 2);
489
490 qjack_client_connect_ports(c);
491 c->state = QJACK_STATE_RUNNING;
492 return 0;
493}
494
495static int qjack_init_out(HWVoiceOut *hw, struct audsettings *as,
496 void *drv_opaque)
497{
498 QJackOut *jo = (QJackOut *)hw;
499 Audiodev *dev = (Audiodev *)drv_opaque;
500
501 jo->c.out = true;
502 jo->c.enabled = false;
503 jo->c.nchannels = as->nchannels;
504 jo->c.opt = dev->u.jack.out;
505
506 jo->c.shutdown_bh = qemu_bh_new(qjack_shutdown_bh, &jo->c);
507
508 int ret = qjack_client_init(&jo->c);
509 if (ret != 0) {
510 qemu_bh_delete(jo->c.shutdown_bh);
511 return ret;
512 }
513
514
515 hw->samples = jo->c.buffersize;
516
517
518 struct audsettings os = {
519 .freq = jo->c.freq,
520 .nchannels = jo->c.nchannels,
521 .fmt = AUDIO_FORMAT_F32,
522 .endianness = 0
523 };
524 audio_pcm_init_info(&hw->info, &os);
525
526 dolog("JACK output configured for %dHz (%d samples)\n",
527 jo->c.freq, jo->c.buffersize);
528
529 return 0;
530}
531
532static int qjack_init_in(HWVoiceIn *hw, struct audsettings *as,
533 void *drv_opaque)
534{
535 QJackIn *ji = (QJackIn *)hw;
536 Audiodev *dev = (Audiodev *)drv_opaque;
537
538 ji->c.out = false;
539 ji->c.enabled = false;
540 ji->c.nchannels = as->nchannels;
541 ji->c.opt = dev->u.jack.in;
542
543 ji->c.shutdown_bh = qemu_bh_new(qjack_shutdown_bh, &ji->c);
544
545 int ret = qjack_client_init(&ji->c);
546 if (ret != 0) {
547 qemu_bh_delete(ji->c.shutdown_bh);
548 return ret;
549 }
550
551
552 hw->samples = ji->c.buffersize;
553
554
555 struct audsettings is = {
556 .freq = ji->c.freq,
557 .nchannels = ji->c.nchannels,
558 .fmt = AUDIO_FORMAT_F32,
559 .endianness = 0
560 };
561 audio_pcm_init_info(&hw->info, &is);
562
563 dolog("JACK input configured for %dHz (%d samples)\n",
564 ji->c.freq, ji->c.buffersize);
565
566 return 0;
567}
568
569static void qjack_client_fini_locked(QJackClient *c)
570{
571 switch (c->state) {
572 case QJACK_STATE_RUNNING:
573 jack_deactivate(c->client);
574
575
576 case QJACK_STATE_SHUTDOWN:
577 jack_client_close(c->client);
578 c->client = NULL;
579
580 qjack_buffer_free(&c->fifo);
581 g_free(c->port);
582
583 c->state = QJACK_STATE_DISCONNECTED;
584
585
586 case QJACK_STATE_DISCONNECTED:
587 break;
588 }
589}
590
591static void qjack_client_fini(QJackClient *c)
592{
593 qemu_mutex_lock(&qjack_shutdown_lock);
594 qjack_client_fini_locked(c);
595 qemu_mutex_unlock(&qjack_shutdown_lock);
596}
597
598static void qjack_fini_out(HWVoiceOut *hw)
599{
600 QJackOut *jo = (QJackOut *)hw;
601 qjack_client_fini(&jo->c);
602
603 qemu_bh_delete(jo->c.shutdown_bh);
604}
605
606static void qjack_fini_in(HWVoiceIn *hw)
607{
608 QJackIn *ji = (QJackIn *)hw;
609 qjack_client_fini(&ji->c);
610
611 qemu_bh_delete(ji->c.shutdown_bh);
612}
613
614static void qjack_enable_out(HWVoiceOut *hw, bool enable)
615{
616 QJackOut *jo = (QJackOut *)hw;
617 jo->c.enabled = enable;
618}
619
620static void qjack_enable_in(HWVoiceIn *hw, bool enable)
621{
622 QJackIn *ji = (QJackIn *)hw;
623 ji->c.enabled = enable;
624}
625
626static int qjack_thread_creator(jack_native_thread_t *thread,
627 const pthread_attr_t *attr, void *(*function)(void *), void *arg)
628{
629 int ret = pthread_create(thread, attr, function, arg);
630 if (ret != 0) {
631 return ret;
632 }
633
634
635 pthread_setname_np(*thread, "jack-client");
636
637 return ret;
638}
639
640static void *qjack_init(Audiodev *dev)
641{
642 assert(dev->driver == AUDIODEV_DRIVER_JACK);
643 return dev;
644}
645
646static void qjack_fini(void *opaque)
647{
648}
649
650static struct audio_pcm_ops jack_pcm_ops = {
651 .init_out = qjack_init_out,
652 .fini_out = qjack_fini_out,
653 .write = qjack_write,
654 .run_buffer_out = audio_generic_run_buffer_out,
655 .enable_out = qjack_enable_out,
656
657 .init_in = qjack_init_in,
658 .fini_in = qjack_fini_in,
659 .read = qjack_read,
660 .run_buffer_in = audio_generic_run_buffer_in,
661 .enable_in = qjack_enable_in
662};
663
664static struct audio_driver jack_driver = {
665 .name = "jack",
666 .descr = "JACK Audio Connection Kit Client",
667 .init = qjack_init,
668 .fini = qjack_fini,
669 .pcm_ops = &jack_pcm_ops,
670 .can_be_default = 1,
671 .max_voices_out = INT_MAX,
672 .max_voices_in = INT_MAX,
673 .voice_size_out = sizeof(QJackOut),
674 .voice_size_in = sizeof(QJackIn)
675};
676
677static void qjack_error(const char *msg)
678{
679 dolog("E: %s\n", msg);
680}
681
682static void qjack_info(const char *msg)
683{
684 dolog("I: %s\n", msg);
685}
686
687static void register_audio_jack(void)
688{
689 qemu_mutex_init(&qjack_shutdown_lock);
690 audio_driver_register(&jack_driver);
691 jack_set_thread_creator(qjack_thread_creator);
692 jack_set_error_function(qjack_error);
693 jack_set_info_function(qjack_info);
694}
695type_init(register_audio_jack);
696