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1 /***
2   This file is part of PulseAudio.
3 
4   Copyright 2004-2006 Lennart Poettering
5 
6   PulseAudio is free software; you can redistribute it and/or modify
7   it under the terms of the GNU Lesser General Public License as published
8   by the Free Software Foundation; either version 2.1 of the License,
9   or (at your option) any later version.
10 
11   PulseAudio is distributed in the hope that it will be useful, but
12   WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14   General Public License for more details.
15 
16   You should have received a copy of the GNU Lesser General Public License
17   along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
18 ***/
19 
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23 
24 #include <stdlib.h>
25 #include <stdio.h>
26 #include <errno.h>
27 
28 #include <pulse/xmalloc.h>
29 #include <pulse/timeval.h>
30 
31 #include <pulsecore/sink-input.h>
32 #include <pulsecore/source-output.h>
33 #include <pulsecore/client.h>
34 #include <pulsecore/sample-util.h>
35 #include <pulsecore/namereg.h>
36 #include <pulsecore/log.h>
37 #include <pulsecore/core-error.h>
38 #include <pulsecore/atomic.h>
39 #include <pulsecore/thread-mq.h>
40 #include <pulsecore/core-util.h>
41 #include <pulsecore/shared.h>
42 
43 #include "protocol-simple.h"
44 
45 /* Don't allow more than this many concurrent connections */
46 #define MAX_CONNECTIONS 10
47 
48 typedef struct connection {
49     pa_msgobject parent;
50     pa_simple_protocol *protocol;
51     pa_simple_options *options;
52     pa_iochannel *io;
53     pa_sink_input *sink_input;
54     pa_source_output *source_output;
55     pa_client *client;
56     pa_memblockq *input_memblockq, *output_memblockq;
57 
58     bool dead;
59 
60     struct {
61         pa_memblock *current_memblock;
62         size_t memblock_index;
63         pa_atomic_t missing;
64         bool underrun;
65     } playback;
66 } connection;
67 
68 PA_DEFINE_PRIVATE_CLASS(connection, pa_msgobject);
69 #define CONNECTION(o) (connection_cast(o))
70 
71 struct pa_simple_protocol {
72     PA_REFCNT_DECLARE;
73 
74     pa_core *core;
75     pa_idxset *connections;
76 };
77 
78 enum {
79     SINK_INPUT_MESSAGE_POST_DATA = PA_SINK_INPUT_MESSAGE_MAX, /* data from main loop to sink input */
80     SINK_INPUT_MESSAGE_DISABLE_PREBUF /* disabled prebuf, get playback started. */
81 };
82 
83 enum {
84     CONNECTION_MESSAGE_REQUEST_DATA,      /* data requested from sink input from the main loop */
85     CONNECTION_MESSAGE_POST_DATA,         /* data from source output to main loop */
86     CONNECTION_MESSAGE_UNLINK_CONNECTION  /* Please drop the connection now */
87 };
88 
89 #define PLAYBACK_BUFFER_SECONDS (.5)
90 #define PLAYBACK_BUFFER_FRAGMENTS (10)
91 #define RECORD_BUFFER_SECONDS (5)
92 #define DEFAULT_SINK_LATENCY (300*PA_USEC_PER_MSEC)
93 #define DEFAULT_SOURCE_LATENCY (300*PA_USEC_PER_MSEC)
94 
connection_unlink(connection * c)95 static void connection_unlink(connection *c) {
96     pa_assert(c);
97 
98     if (!c->protocol)
99         return;
100 
101     if (c->options) {
102         pa_simple_options_unref(c->options);
103         c->options = NULL;
104     }
105 
106     if (c->sink_input) {
107         pa_sink_input_unlink(c->sink_input);
108         pa_sink_input_unref(c->sink_input);
109         c->sink_input = NULL;
110     }
111 
112     if (c->source_output) {
113         pa_source_output_unlink(c->source_output);
114         pa_source_output_unref(c->source_output);
115         c->source_output = NULL;
116     }
117 
118     if (c->client) {
119         pa_client_free(c->client);
120         c->client = NULL;
121     }
122 
123     if (c->io) {
124         pa_iochannel_free(c->io);
125         c->io = NULL;
126     }
127 
128     pa_idxset_remove_by_data(c->protocol->connections, c, NULL);
129     c->protocol = NULL;
130     connection_unref(c);
131 }
132 
connection_free(pa_object * o)133 static void connection_free(pa_object *o) {
134     connection *c = CONNECTION(o);
135     pa_assert(c);
136 
137     if (c->playback.current_memblock)
138         pa_memblock_unref(c->playback.current_memblock);
139 
140     if (c->input_memblockq)
141         pa_memblockq_free(c->input_memblockq);
142     if (c->output_memblockq)
143         pa_memblockq_free(c->output_memblockq);
144 
145     pa_xfree(c);
146 }
147 
do_read(connection * c)148 static int do_read(connection *c) {
149     pa_memchunk chunk;
150     ssize_t r;
151     size_t l;
152     void *p;
153     size_t space = 0;
154 
155     connection_assert_ref(c);
156 
157     if (!c->sink_input || (l = (size_t) pa_atomic_load(&c->playback.missing)) <= 0)
158         return 0;
159 
160     if (c->playback.current_memblock) {
161 
162         space = pa_memblock_get_length(c->playback.current_memblock) - c->playback.memblock_index;
163 
164         if (space <= 0) {
165             pa_memblock_unref(c->playback.current_memblock);
166             c->playback.current_memblock = NULL;
167         }
168     }
169 
170     if (!c->playback.current_memblock) {
171         pa_assert_se(c->playback.current_memblock = pa_memblock_new(c->protocol->core->mempool, (size_t) -1));
172         c->playback.memblock_index = 0;
173 
174         space = pa_memblock_get_length(c->playback.current_memblock);
175     }
176 
177     if (l > space)
178         l = space;
179 
180     p = pa_memblock_acquire(c->playback.current_memblock);
181     r = pa_iochannel_read(c->io, (uint8_t*) p + c->playback.memblock_index, l);
182     pa_memblock_release(c->playback.current_memblock);
183 
184     if (r <= 0) {
185 
186         if (r < 0 && errno == EAGAIN)
187             return 0;
188 
189         pa_log_debug("read(): %s", r == 0 ? "EOF" : pa_cstrerror(errno));
190         return -1;
191     }
192 
193     chunk.memblock = c->playback.current_memblock;
194     chunk.index = c->playback.memblock_index;
195     chunk.length = (size_t) r;
196 
197     c->playback.memblock_index += (size_t) r;
198 
199     pa_asyncmsgq_post(c->sink_input->sink->asyncmsgq, PA_MSGOBJECT(c->sink_input), SINK_INPUT_MESSAGE_POST_DATA, NULL, 0, &chunk, NULL);
200     pa_atomic_sub(&c->playback.missing, (int) r);
201 
202     return 0;
203 }
204 
do_write(connection * c)205 static int do_write(connection *c) {
206     pa_memchunk chunk;
207     ssize_t r;
208     void *p;
209 
210     connection_assert_ref(c);
211 
212     if (!c->source_output)
213         return 0;
214 
215     if (pa_memblockq_peek(c->output_memblockq, &chunk) < 0) {
216 /*         pa_log("peek failed"); */
217         return 0;
218     }
219 
220     pa_assert(chunk.memblock);
221     pa_assert(chunk.length);
222 
223     p = pa_memblock_acquire(chunk.memblock);
224     r = pa_iochannel_write(c->io, (uint8_t*) p+chunk.index, chunk.length);
225     pa_memblock_release(chunk.memblock);
226 
227     pa_memblock_unref(chunk.memblock);
228 
229     if (r < 0) {
230         pa_log("write(): %s", pa_cstrerror(errno));
231         return -1;
232     }
233 
234     pa_memblockq_drop(c->output_memblockq, (size_t) r);
235 
236     return 1;
237 }
238 
do_work(connection * c)239 static void do_work(connection *c) {
240     connection_assert_ref(c);
241 
242     if (c->dead)
243         return;
244 
245     if (pa_iochannel_is_readable(c->io))
246         if (do_read(c) < 0)
247             goto fail;
248 
249     if (!c->sink_input && pa_iochannel_is_hungup(c->io))
250         goto fail;
251 
252     while (pa_iochannel_is_writable(c->io)) {
253         int r = do_write(c);
254         if (r < 0)
255             goto fail;
256         if (r == 0)
257             break;
258     }
259 
260     return;
261 
262 fail:
263 
264     if (c->sink_input) {
265 
266         /* If there is a sink input, we first drain what we already have read before shutting down the connection */
267         c->dead = true;
268 
269         pa_iochannel_free(c->io);
270         c->io = NULL;
271 
272         pa_asyncmsgq_post(c->sink_input->sink->asyncmsgq, PA_MSGOBJECT(c->sink_input), SINK_INPUT_MESSAGE_DISABLE_PREBUF, NULL, 0, NULL, NULL);
273     } else
274         connection_unlink(c);
275 }
276 
connection_process_msg(pa_msgobject * o,int code,void * userdata,int64_t offset,pa_memchunk * chunk)277 static int connection_process_msg(pa_msgobject *o, int code, void*userdata, int64_t offset, pa_memchunk *chunk) {
278     connection *c = CONNECTION(o);
279     connection_assert_ref(c);
280 
281     if (!c->protocol)
282         return -1;
283 
284     switch (code) {
285         case CONNECTION_MESSAGE_REQUEST_DATA:
286             do_work(c);
287             break;
288 
289         case CONNECTION_MESSAGE_POST_DATA:
290 /*             pa_log("got data %u", chunk->length); */
291             pa_memblockq_push_align(c->output_memblockq, chunk);
292             do_work(c);
293             break;
294 
295         case CONNECTION_MESSAGE_UNLINK_CONNECTION:
296             connection_unlink(c);
297             break;
298     }
299 
300     return 0;
301 }
302 
303 /*** sink_input callbacks ***/
304 
305 /* Called from thread context */
sink_input_process_msg(pa_msgobject * o,int code,void * userdata,int64_t offset,pa_memchunk * chunk)306 static int sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
307     pa_sink_input *i = PA_SINK_INPUT(o);
308     connection*c;
309 
310     pa_sink_input_assert_ref(i);
311     c = CONNECTION(i->userdata);
312     connection_assert_ref(c);
313 
314     switch (code) {
315 
316         case SINK_INPUT_MESSAGE_POST_DATA: {
317             pa_assert(chunk);
318 
319             /* New data from the main loop */
320             pa_memblockq_push_align(c->input_memblockq, chunk);
321 
322             if (pa_memblockq_is_readable(c->input_memblockq) && c->playback.underrun) {
323                 pa_log_debug("Requesting rewind due to end of underrun.");
324                 pa_sink_input_request_rewind(c->sink_input, 0, false, true, false);
325             }
326 
327 /*             pa_log("got data, %u", pa_memblockq_get_length(c->input_memblockq)); */
328 
329             return 0;
330         }
331 
332         case SINK_INPUT_MESSAGE_DISABLE_PREBUF:
333             pa_memblockq_prebuf_disable(c->input_memblockq);
334             return 0;
335 
336         case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
337             pa_usec_t *r = userdata;
338 
339             /* The default handler will add in the extra latency added by the resampler.*/
340             *r = pa_bytes_to_usec(pa_memblockq_get_length(c->input_memblockq), &c->sink_input->sample_spec);
341         }
342         /* Fall through. */
343 
344         default:
345             return pa_sink_input_process_msg(o, code, userdata, offset, chunk);
346     }
347 }
348 
349 /* Called from thread context */
sink_input_pop_cb(pa_sink_input * i,size_t length,pa_memchunk * chunk)350 static int sink_input_pop_cb(pa_sink_input *i, size_t length, pa_memchunk *chunk) {
351     connection *c;
352 
353     pa_sink_input_assert_ref(i);
354     c = CONNECTION(i->userdata);
355     connection_assert_ref(c);
356     pa_assert(chunk);
357 
358     if (pa_memblockq_peek(c->input_memblockq, chunk) < 0) {
359 
360         c->playback.underrun = true;
361 
362         if (c->dead && pa_sink_input_safe_to_remove(i))
363             pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(c), CONNECTION_MESSAGE_UNLINK_CONNECTION, NULL, 0, NULL, NULL);
364 
365         return -1;
366     } else {
367         size_t m;
368 
369         chunk->length = PA_MIN(length, chunk->length);
370 
371         c->playback.underrun = false;
372 
373         pa_memblockq_drop(c->input_memblockq, chunk->length);
374         m = pa_memblockq_pop_missing(c->input_memblockq);
375 
376         if (m > 0)
377             if (pa_atomic_add(&c->playback.missing, (int) m) <= 0)
378                 pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(c), CONNECTION_MESSAGE_REQUEST_DATA, NULL, 0, NULL, NULL);
379 
380         return 0;
381     }
382 }
383 
384 /* Called from thread context */
sink_input_process_rewind_cb(pa_sink_input * i,size_t nbytes)385 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
386     connection *c;
387 
388     pa_sink_input_assert_ref(i);
389     c = CONNECTION(i->userdata);
390     connection_assert_ref(c);
391 
392     /* If we are in an underrun, then we don't rewind */
393     if (i->thread_info.underrun_for > 0)
394         return;
395 
396     pa_memblockq_rewind(c->input_memblockq, nbytes);
397 }
398 
399 /* Called from thread context */
sink_input_update_max_rewind_cb(pa_sink_input * i,size_t nbytes)400 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
401     connection *c;
402 
403     pa_sink_input_assert_ref(i);
404     c = CONNECTION(i->userdata);
405     connection_assert_ref(c);
406 
407     pa_memblockq_set_maxrewind(c->input_memblockq, nbytes);
408 }
409 
410 /* Called from main context */
sink_input_kill_cb(pa_sink_input * i)411 static void sink_input_kill_cb(pa_sink_input *i) {
412     pa_sink_input_assert_ref(i);
413 
414     connection_unlink(CONNECTION(i->userdata));
415 }
416 
417 /*** source_output callbacks ***/
418 
419 /* Called from thread context */
source_output_push_cb(pa_source_output * o,const pa_memchunk * chunk)420 static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
421     connection *c;
422 
423     pa_source_output_assert_ref(o);
424     c = CONNECTION(o->userdata);
425     pa_assert(c);
426     pa_assert(chunk);
427 
428     pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(c), CONNECTION_MESSAGE_POST_DATA, NULL, 0, chunk, NULL);
429 }
430 
431 /* Called from main context */
source_output_kill_cb(pa_source_output * o)432 static void source_output_kill_cb(pa_source_output *o) {
433     pa_source_output_assert_ref(o);
434 
435     connection_unlink(CONNECTION(o->userdata));
436 }
437 
438 /* Called from main context */
source_output_get_latency_cb(pa_source_output * o)439 static pa_usec_t source_output_get_latency_cb(pa_source_output *o) {
440     connection*c;
441 
442     pa_source_output_assert_ref(o);
443     c = CONNECTION(o->userdata);
444     pa_assert(c);
445 
446     return pa_bytes_to_usec(pa_memblockq_get_length(c->output_memblockq), &c->source_output->sample_spec);
447 }
448 
449 /*** client callbacks ***/
450 
client_kill_cb(pa_client * client)451 static void client_kill_cb(pa_client *client) {
452     connection*c;
453 
454     pa_assert(client);
455     c = CONNECTION(client->userdata);
456     pa_assert(c);
457 
458     connection_unlink(c);
459 }
460 
461 /*** pa_iochannel callbacks ***/
462 
io_callback(pa_iochannel * io,void * userdata)463 static void io_callback(pa_iochannel*io, void *userdata) {
464     connection *c = CONNECTION(userdata);
465 
466     connection_assert_ref(c);
467     pa_assert(io);
468 
469     do_work(c);
470 }
471 
472 /*** socket_server callbacks ***/
473 
pa_simple_protocol_connect(pa_simple_protocol * p,pa_iochannel * io,pa_simple_options * o)474 void pa_simple_protocol_connect(pa_simple_protocol *p, pa_iochannel *io, pa_simple_options *o) {
475     connection *c = NULL;
476     char pname[128];
477     pa_client_new_data client_data;
478 
479     pa_assert(p);
480     pa_assert(io);
481     pa_assert(o);
482 
483     if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) {
484         pa_log("Warning! Too many connections (%u), dropping incoming connection.", MAX_CONNECTIONS);
485         pa_iochannel_free(io);
486         return;
487     }
488 
489     c = pa_msgobject_new(connection);
490     c->parent.parent.free = connection_free;
491     c->parent.process_msg = connection_process_msg;
492     c->io = io;
493     pa_iochannel_set_callback(c->io, io_callback, c);
494 
495     c->sink_input = NULL;
496     c->source_output = NULL;
497     c->input_memblockq = c->output_memblockq = NULL;
498     c->protocol = p;
499     c->options = pa_simple_options_ref(o);
500     c->playback.current_memblock = NULL;
501     c->playback.memblock_index = 0;
502     c->dead = false;
503     c->playback.underrun = true;
504     pa_atomic_store(&c->playback.missing, 0);
505 
506     pa_client_new_data_init(&client_data);
507     client_data.module = o->module;
508     client_data.driver = __FILE__;
509     pa_iochannel_socket_peer_to_string(io, pname, sizeof(pname));
510     pa_proplist_setf(client_data.proplist, PA_PROP_APPLICATION_NAME, "Simple client (%s)", pname);
511     pa_proplist_sets(client_data.proplist, "simple-protocol.peer", pname);
512     c->client = pa_client_new(p->core, &client_data);
513     pa_client_new_data_done(&client_data);
514 
515     if (!c->client)
516         goto fail;
517 
518     c->client->kill = client_kill_cb;
519     c->client->userdata = c;
520 
521     if (o->playback) {
522         pa_sink_input_new_data data;
523         pa_memchunk silence;
524         size_t l;
525         pa_sink *sink;
526 
527         if (!(sink = pa_namereg_get(c->protocol->core, o->default_sink, PA_NAMEREG_SINK))) {
528             pa_log("Failed to get sink.");
529             goto fail;
530         }
531 
532         pa_sink_input_new_data_init(&data);
533         data.driver = __FILE__;
534         data.module = o->module;
535         data.client = c->client;
536         pa_sink_input_new_data_set_sink(&data, sink, false, true);
537         pa_proplist_update(data.proplist, PA_UPDATE_MERGE, c->client->proplist);
538         pa_sink_input_new_data_set_sample_spec(&data, &o->sample_spec);
539 
540         pa_sink_input_new(&c->sink_input, p->core, &data);
541         pa_sink_input_new_data_done(&data);
542 
543         if (!c->sink_input) {
544             pa_log("Failed to create sink input.");
545             goto fail;
546         }
547 
548         c->sink_input->parent.process_msg = sink_input_process_msg;
549         c->sink_input->pop = sink_input_pop_cb;
550         c->sink_input->process_rewind = sink_input_process_rewind_cb;
551         c->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
552         c->sink_input->kill = sink_input_kill_cb;
553         c->sink_input->userdata = c;
554 
555         pa_sink_input_set_requested_latency(c->sink_input, DEFAULT_SINK_LATENCY);
556 
557         l = (size_t) ((double) pa_bytes_per_second(&o->sample_spec)*PLAYBACK_BUFFER_SECONDS);
558         pa_sink_input_get_silence(c->sink_input, &silence);
559         c->input_memblockq = pa_memblockq_new(
560                 "simple protocol connection input_memblockq",
561                 0,
562                 l,
563                 l,
564                 &o->sample_spec,
565                 (size_t) -1,
566                 l/PLAYBACK_BUFFER_FRAGMENTS,
567                 0,
568                 &silence);
569         pa_memblock_unref(silence.memblock);
570 
571         pa_iochannel_socket_set_rcvbuf(io, l);
572 
573         pa_atomic_store(&c->playback.missing, (int) pa_memblockq_pop_missing(c->input_memblockq));
574 
575         pa_sink_input_put(c->sink_input);
576     }
577 
578     if (o->record) {
579         pa_source_output_new_data data;
580         size_t l;
581         pa_source *source;
582 
583         if (!(source = pa_namereg_get(c->protocol->core, o->default_source, PA_NAMEREG_SOURCE))) {
584             pa_log("Failed to get source.");
585             goto fail;
586         }
587 
588         pa_source_output_new_data_init(&data);
589         data.driver = __FILE__;
590         data.module = o->module;
591         data.client = c->client;
592         pa_source_output_new_data_set_source(&data, source, false, true);
593         pa_proplist_update(data.proplist, PA_UPDATE_MERGE, c->client->proplist);
594         pa_source_output_new_data_set_sample_spec(&data, &o->sample_spec);
595 
596         pa_source_output_new(&c->source_output, p->core, &data);
597         pa_source_output_new_data_done(&data);
598 
599         if (!c->source_output) {
600             pa_log("Failed to create source output.");
601             goto fail;
602         }
603         c->source_output->push = source_output_push_cb;
604         c->source_output->kill = source_output_kill_cb;
605         c->source_output->get_latency = source_output_get_latency_cb;
606         c->source_output->userdata = c;
607 
608         pa_source_output_set_requested_latency(c->source_output, DEFAULT_SOURCE_LATENCY);
609 
610         l = (size_t) (pa_bytes_per_second(&o->sample_spec)*RECORD_BUFFER_SECONDS);
611         c->output_memblockq = pa_memblockq_new(
612                 "simple protocol connection output_memblockq",
613                 0,
614                 l,
615                 0,
616                 &o->sample_spec,
617                 1,
618                 0,
619                 0,
620                 NULL);
621         pa_iochannel_socket_set_sndbuf(io, l);
622 
623         pa_source_output_put(c->source_output);
624     }
625 
626     pa_idxset_put(p->connections, c, NULL);
627 
628     return;
629 
630 fail:
631     connection_unlink(c);
632 }
633 
pa_simple_protocol_disconnect(pa_simple_protocol * p,pa_module * m)634 void pa_simple_protocol_disconnect(pa_simple_protocol *p, pa_module *m) {
635     connection *c;
636     void *state = NULL;
637 
638     pa_assert(p);
639     pa_assert(m);
640 
641     while ((c = pa_idxset_iterate(p->connections, &state, NULL)))
642         if (c->options->module == m)
643             connection_unlink(c);
644 }
645 
simple_protocol_new(pa_core * c)646 static pa_simple_protocol* simple_protocol_new(pa_core *c) {
647     pa_simple_protocol *p;
648 
649     pa_assert(c);
650 
651     p = pa_xnew(pa_simple_protocol, 1);
652     PA_REFCNT_INIT(p);
653     p->core = c;
654     p->connections = pa_idxset_new(NULL, NULL);
655 
656     pa_assert_se(pa_shared_set(c, "simple-protocol", p) >= 0);
657 
658     return p;
659 }
660 
pa_simple_protocol_get(pa_core * c)661 pa_simple_protocol* pa_simple_protocol_get(pa_core *c) {
662     pa_simple_protocol *p;
663 
664     if ((p = pa_shared_get(c, "simple-protocol")))
665         return pa_simple_protocol_ref(p);
666 
667     return simple_protocol_new(c);
668 }
669 
pa_simple_protocol_ref(pa_simple_protocol * p)670 pa_simple_protocol* pa_simple_protocol_ref(pa_simple_protocol *p) {
671     pa_assert(p);
672     pa_assert(PA_REFCNT_VALUE(p) >= 1);
673 
674     PA_REFCNT_INC(p);
675 
676     return p;
677 }
678 
pa_simple_protocol_unref(pa_simple_protocol * p)679 void pa_simple_protocol_unref(pa_simple_protocol *p) {
680     connection *c;
681     pa_assert(p);
682     pa_assert(PA_REFCNT_VALUE(p) >= 1);
683 
684     if (PA_REFCNT_DEC(p) > 0)
685         return;
686 
687     while ((c = pa_idxset_first(p->connections, NULL)))
688         connection_unlink(c);
689 
690     pa_idxset_free(p->connections, NULL);
691 
692     pa_assert_se(pa_shared_remove(p->core, "simple-protocol") >= 0);
693 
694     pa_xfree(p);
695 }
696 
pa_simple_options_new(void)697 pa_simple_options* pa_simple_options_new(void) {
698     pa_simple_options *o;
699 
700     o = pa_xnew0(pa_simple_options, 1);
701     PA_REFCNT_INIT(o);
702 
703     o->record = false;
704     o->playback = true;
705 
706     return o;
707 }
708 
pa_simple_options_ref(pa_simple_options * o)709 pa_simple_options* pa_simple_options_ref(pa_simple_options *o) {
710     pa_assert(o);
711     pa_assert(PA_REFCNT_VALUE(o) >= 1);
712 
713     PA_REFCNT_INC(o);
714 
715     return o;
716 }
717 
pa_simple_options_unref(pa_simple_options * o)718 void pa_simple_options_unref(pa_simple_options *o) {
719     pa_assert(o);
720     pa_assert(PA_REFCNT_VALUE(o) >= 1);
721 
722     if (PA_REFCNT_DEC(o) > 0)
723         return;
724 
725     pa_xfree(o->default_sink);
726     pa_xfree(o->default_source);
727 
728     pa_xfree(o);
729 }
730 
pa_simple_options_parse(pa_simple_options * o,pa_core * c,pa_modargs * ma)731 int pa_simple_options_parse(pa_simple_options *o, pa_core *c, pa_modargs *ma) {
732     bool enabled;
733 
734     pa_assert(o);
735     pa_assert(PA_REFCNT_VALUE(o) >= 1);
736     pa_assert(ma);
737 
738     o->sample_spec = c->default_sample_spec;
739     if (pa_modargs_get_sample_spec_and_channel_map(ma, &o->sample_spec, &o->channel_map, PA_CHANNEL_MAP_DEFAULT) < 0) {
740         pa_log("Failed to parse sample type specification.");
741         return -1;
742     }
743 
744     pa_xfree(o->default_source);
745     o->default_source = pa_xstrdup(pa_modargs_get_value(ma, "source", NULL));
746 
747     pa_xfree(o->default_sink);
748     o->default_sink = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
749 
750     enabled = o->record;
751     if (pa_modargs_get_value_boolean(ma, "record", &enabled) < 0) {
752         pa_log("record= expects a boolean argument.");
753         return -1;
754     }
755     o->record = enabled;
756 
757     enabled = o->playback;
758     if (pa_modargs_get_value_boolean(ma, "playback", &enabled) < 0) {
759         pa_log("playback= expects a boolean argument.");
760         return -1;
761     }
762     o->playback = enabled;
763 
764     if (!o->playback && !o->record) {
765         pa_log("neither playback nor recording enabled for protocol.");
766         return -1;
767     }
768 
769     return 0;
770 }
771