6 #include <sys/socket.h>
10 #include "protocol-native-spec.h"
11 #include "pdispatch.h"
14 #include "socket-client.h"
15 #include "pstream-util.h"
19 #define DEFAULT_MAXLENGTH 204800
20 #define DEFAULT_TLENGTH 10240
21 #define DEFAULT_PREBUF 4096
22 #define DEFAULT_MINREQ 1024
23 #define DEFAULT_FRAGSIZE 1024
25 #define DEFAULT_TIMEOUT (5*60)
26 #define DEFAULT_SERVER "/tmp/polypaudio/native"
27 #define DEFAULT_PORT "4713"
31 struct pa_mainloop_api* mainloop;
32 struct pa_socket_client *client;
33 struct pa_pstream *pstream;
34 struct pa_pdispatch *pdispatch;
35 struct pa_dynarray *record_streams, *playback_streams;
36 struct pa_stream *first_stream;
48 void (*connect_complete_callback)(struct pa_context*c, int success, void *userdata);
49 void *connect_complete_userdata;
51 void (*drain_complete_callback)(struct pa_context*c, void *userdata);
52 void *drain_complete_userdata;
54 void (*die_callback)(struct pa_context*c, void *userdata);
57 void (*stat_callback)(struct pa_context*c, uint32_t count, uint32_t total, void *userdata);
60 uint8_t auth_cookie[PA_NATIVE_COOKIE_LENGTH];
64 struct pa_context *context;
65 struct pa_stream *next, *previous;
68 struct pa_buffer_attr buffer_attr;
69 struct pa_sample_spec sample_spec;
70 uint32_t device_index;
73 enum pa_stream_direction direction;
75 enum { STREAM_LOOKING_UP, STREAM_CREATING, STREAM_READY, STREAM_DEAD} state;
76 uint32_t requested_bytes;
78 void (*read_callback)(struct pa_stream *p, const void*data, size_t length, void *userdata);
81 void (*write_callback)(struct pa_stream *p, size_t length, void *userdata);
84 void (*create_complete_callback)(struct pa_stream *s, int success, void *userdata);
85 void *create_complete_userdata;
87 void (*drain_complete_callback)(struct pa_stream *s, void *userdata);
88 void *drain_complete_userdata;
90 void (*die_callback)(struct pa_stream*c, void *userdata);
93 void (*get_latency_callback)(struct pa_stream*c, uint32_t latency, void *userdata);
94 void *get_latency_userdata;
97 static void command_request(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
98 static void command_playback_stream_killed(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
100 static const struct pa_pdispatch_command command_table[PA_COMMAND_MAX] = {
101 [PA_COMMAND_ERROR] = { NULL },
102 [PA_COMMAND_REPLY] = { NULL },
103 [PA_COMMAND_CREATE_PLAYBACK_STREAM] = { NULL },
104 [PA_COMMAND_DELETE_PLAYBACK_STREAM] = { NULL },
105 [PA_COMMAND_CREATE_RECORD_STREAM] = { NULL },
106 [PA_COMMAND_DELETE_RECORD_STREAM] = { NULL },
107 [PA_COMMAND_EXIT] = { NULL },
108 [PA_COMMAND_REQUEST] = { command_request },
109 [PA_COMMAND_PLAYBACK_STREAM_KILLED] = { command_playback_stream_killed },
110 [PA_COMMAND_RECORD_STREAM_KILLED] = { command_playback_stream_killed },
113 struct pa_context *pa_context_new(struct pa_mainloop_api *mainloop, const char *name) {
114 struct pa_context *c;
115 assert(mainloop && name);
117 c = malloc(sizeof(struct pa_context));
119 c->name = strdup(name);
120 c->mainloop = mainloop;
124 c->playback_streams = pa_dynarray_new();
125 assert(c->playback_streams);
126 c->record_streams = pa_dynarray_new();
127 assert(c->record_streams);
128 c->first_stream = NULL;
129 c->error = PA_ERROR_OK;
130 c->state = CONTEXT_UNCONNECTED;
133 c->connect_complete_callback = NULL;
134 c->connect_complete_userdata = NULL;
136 c->drain_complete_callback = NULL;
137 c->drain_complete_userdata = NULL;
139 c->die_callback = NULL;
140 c->die_userdata = NULL;
142 c->stat_callback = NULL;
143 c->stat_userdata = NULL;
145 pa_check_for_sigpipe();
149 void pa_context_free(struct pa_context *c) {
152 while (c->first_stream)
153 pa_stream_free(c->first_stream);
156 pa_socket_client_free(c->client);
158 pa_pdispatch_free(c->pdispatch);
160 pa_pstream_free(c->pstream);
161 if (c->record_streams)
162 pa_dynarray_free(c->record_streams, NULL, NULL);
163 if (c->playback_streams)
164 pa_dynarray_free(c->playback_streams, NULL, NULL);
170 static void stream_dead(struct pa_stream *s) {
173 if (s->state == STREAM_DEAD)
176 if (s->state == STREAM_READY) {
177 s->state = STREAM_DEAD;
179 s->die_callback(s, s->die_userdata);
181 s->state = STREAM_DEAD;
184 static void context_dead(struct pa_context *c) {
188 if (c->state == CONTEXT_DEAD)
192 pa_pdispatch_free(c->pdispatch);
196 pa_pstream_free(c->pstream);
200 pa_socket_client_free(c->client);
203 for (s = c->first_stream; s; s = s->next)
206 if (c->state == CONTEXT_READY) {
207 c->state = CONTEXT_DEAD;
209 c->die_callback(c, c->die_userdata);
211 c->state = CONTEXT_DEAD;
214 static void pstream_die_callback(struct pa_pstream *p, void *userdata) {
215 struct pa_context *c = userdata;
217 c->error = PA_ERROR_CONNECTIONTERMINATED;
221 static void pstream_packet_callback(struct pa_pstream *p, struct pa_packet *packet, void *userdata) {
222 struct pa_context *c = userdata;
223 assert(p && packet && c);
225 if (pa_pdispatch_run(c->pdispatch, packet, c) < 0) {
226 fprintf(stderr, "polyp.c: invalid packet.\n");
227 c->error = PA_ERROR_PROTOCOL;
232 static void pstream_memblock_callback(struct pa_pstream *p, uint32_t channel, int32_t delta, const struct pa_memchunk *chunk, void *userdata) {
233 struct pa_context *c = userdata;
235 assert(p && chunk && c && chunk->memblock && chunk->memblock->data);
237 if (!(s = pa_dynarray_get(c->record_streams, channel)))
240 if (s->read_callback)
241 s->read_callback(s, chunk->memblock->data + chunk->index, chunk->length, s->read_userdata);
244 static int handle_error(struct pa_context *c, uint32_t command, struct pa_tagstruct *t) {
247 if (command == PA_COMMAND_ERROR) {
248 if (pa_tagstruct_getu32(t, &c->error) < 0) {
249 c->error = PA_ERROR_PROTOCOL;
256 c->error = (command == PA_COMMAND_TIMEOUT) ? PA_ERROR_TIMEOUT : PA_ERROR_INTERNAL;
260 static void setup_complete_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
261 struct pa_context *c = userdata;
262 assert(pd && c && (c->state == CONTEXT_AUTHORIZING || c->state == CONTEXT_SETTING_NAME));
264 if (command != PA_COMMAND_REPLY) {
265 handle_error(c, command, t);
268 if (c->connect_complete_callback)
269 c->connect_complete_callback(c, 0, c->connect_complete_userdata);
274 if (c->state == CONTEXT_AUTHORIZING) {
275 struct pa_tagstruct *t;
276 c->state = CONTEXT_SETTING_NAME;
277 t = pa_tagstruct_new(NULL, 0);
279 pa_tagstruct_putu32(t, PA_COMMAND_SET_NAME);
280 pa_tagstruct_putu32(t, tag = c->ctag++);
281 pa_tagstruct_puts(t, c->name);
282 pa_pstream_send_tagstruct(c->pstream, t);
283 pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c);
285 assert(c->state == CONTEXT_SETTING_NAME);
287 c->state = CONTEXT_READY;
289 if (c->connect_complete_callback)
290 c->connect_complete_callback(c, 1, c->connect_complete_userdata);
296 static void on_connection(struct pa_socket_client *client, struct pa_iochannel*io, void *userdata) {
297 struct pa_context *c = userdata;
298 struct pa_tagstruct *t;
300 assert(client && c && c->state == CONTEXT_CONNECTING);
302 pa_socket_client_free(client);
306 c->error = PA_ERROR_CONNECTIONREFUSED;
309 if (c->connect_complete_callback)
310 c->connect_complete_callback(c, 0, c->connect_complete_userdata);
315 c->pstream = pa_pstream_new(c->mainloop, io);
317 pa_pstream_set_die_callback(c->pstream, pstream_die_callback, c);
318 pa_pstream_set_recieve_packet_callback(c->pstream, pstream_packet_callback, c);
319 pa_pstream_set_recieve_memblock_callback(c->pstream, pstream_memblock_callback, c);
321 c->pdispatch = pa_pdispatch_new(c->mainloop, command_table, PA_COMMAND_MAX);
322 assert(c->pdispatch);
324 t = pa_tagstruct_new(NULL, 0);
326 pa_tagstruct_putu32(t, PA_COMMAND_AUTH);
327 pa_tagstruct_putu32(t, tag = c->ctag++);
328 pa_tagstruct_put_arbitrary(t, c->auth_cookie, sizeof(c->auth_cookie));
329 pa_pstream_send_tagstruct(c->pstream, t);
330 pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c);
331 c->state = CONTEXT_AUTHORIZING;
334 static struct sockaddr *resolve_server(const char *server, size_t *len) {
336 struct addrinfo hints, *result = NULL;
338 assert(server && len);
340 if ((port = strrchr(server, ':')))
345 memset(&hints, 0, sizeof(hints));
346 hints.ai_family = PF_UNSPEC;
347 hints.ai_socktype = SOCK_STREAM;
348 hints.ai_protocol = 0;
350 if (getaddrinfo(server, port, &hints, &result) != 0)
354 sa = malloc(*len = result->ai_addrlen);
356 memcpy(sa, result->ai_addr, *len);
358 freeaddrinfo(result);
364 int pa_context_connect(struct pa_context *c, const char *server, void (*complete) (struct pa_context*c, int success, void *userdata), void *userdata) {
365 assert(c && c->state == CONTEXT_UNCONNECTED);
367 if (pa_authkey_load_from_home(PA_NATIVE_COOKIE_FILE, c->auth_cookie, sizeof(c->auth_cookie)) < 0) {
368 c->error = PA_ERROR_AUTHKEY;
373 if (!(server = getenv("POLYP_SERVER")))
374 server = DEFAULT_SERVER;
378 if (*server == '/') {
379 if (!(c->client = pa_socket_client_new_unix(c->mainloop, server))) {
380 c->error = PA_ERROR_CONNECTIONREFUSED;
387 if (!(sa = resolve_server(server, &sa_len))) {
388 c->error = PA_ERROR_INVALIDSERVER;
392 c->client = pa_socket_client_new_sockaddr(c->mainloop, sa, sa_len);
396 c->error = PA_ERROR_CONNECTIONREFUSED;
401 c->connect_complete_callback = complete;
402 c->connect_complete_userdata = userdata;
404 pa_socket_client_set_callback(c->client, on_connection, c);
405 c->state = CONTEXT_CONNECTING;
410 int pa_context_is_dead(struct pa_context *c) {
412 return c->state == CONTEXT_DEAD;
415 int pa_context_is_ready(struct pa_context *c) {
417 return c->state == CONTEXT_READY;
420 int pa_context_errno(struct pa_context *c) {
425 void pa_context_set_die_callback(struct pa_context *c, void (*cb)(struct pa_context *c, void *userdata), void *userdata) {
427 c->die_callback = cb;
428 c->die_userdata = userdata;
431 static void command_playback_stream_killed(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
432 struct pa_context *c = userdata;
435 assert(pd && (command == PA_COMMAND_PLAYBACK_STREAM_KILLED || command == PA_COMMAND_RECORD_STREAM_KILLED) && t && c);
437 if (pa_tagstruct_getu32(t, &channel) < 0 ||
438 !pa_tagstruct_eof(t)) {
439 c->error = PA_ERROR_PROTOCOL;
444 if (!(s = pa_dynarray_get(command == PA_COMMAND_PLAYBACK_STREAM_KILLED ? c->playback_streams : c->record_streams, channel)))
447 c->error = PA_ERROR_KILLED;
451 static void command_request(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
453 struct pa_context *c = userdata;
454 uint32_t bytes, channel;
455 assert(pd && command == PA_COMMAND_REQUEST && t && c);
457 if (pa_tagstruct_getu32(t, &channel) < 0 ||
458 pa_tagstruct_getu32(t, &bytes) < 0 ||
459 !pa_tagstruct_eof(t)) {
460 c->error = PA_ERROR_PROTOCOL;
465 if (!(s = pa_dynarray_get(c->playback_streams, channel)))
468 if (s->state != STREAM_READY)
471 s->requested_bytes += bytes;
473 if (s->requested_bytes && s->write_callback)
474 s->write_callback(s, s->requested_bytes, s->write_userdata);
477 static void create_stream_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
478 struct pa_stream *s = userdata;
479 assert(pd && s && s->state == STREAM_CREATING);
481 if (command != PA_COMMAND_REPLY) {
482 if (handle_error(s->context, command, t) < 0) {
483 context_dead(s->context);
488 if (s->create_complete_callback)
489 s->create_complete_callback(s, 0, s->create_complete_userdata);
494 if (pa_tagstruct_getu32(t, &s->channel) < 0 ||
495 pa_tagstruct_getu32(t, &s->device_index) < 0 ||
496 !pa_tagstruct_eof(t)) {
497 s->context->error = PA_ERROR_PROTOCOL;
498 context_dead(s->context);
502 s->channel_valid = 1;
503 pa_dynarray_put((s->direction == PA_STREAM_PLAYBACK) ? s->context->playback_streams : s->context->record_streams, s->channel, s);
505 s->state = STREAM_READY;
506 if (s->create_complete_callback)
507 s->create_complete_callback(s, 1, s->create_complete_userdata);
510 static void create_stream(struct pa_stream *s, uint32_t tdev_index) {
511 struct pa_tagstruct *t;
515 s->state = STREAM_CREATING;
517 t = pa_tagstruct_new(NULL, 0);
520 pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_CREATE_PLAYBACK_STREAM : PA_COMMAND_CREATE_RECORD_STREAM);
521 pa_tagstruct_putu32(t, tag = s->context->ctag++);
522 pa_tagstruct_puts(t, s->name);
523 pa_tagstruct_put_sample_spec(t, &s->sample_spec);
524 pa_tagstruct_putu32(t, tdev_index);
525 pa_tagstruct_putu32(t, s->buffer_attr.maxlength);
526 if (s->direction == PA_STREAM_PLAYBACK) {
527 pa_tagstruct_putu32(t, s->buffer_attr.tlength);
528 pa_tagstruct_putu32(t, s->buffer_attr.prebuf);
529 pa_tagstruct_putu32(t, s->buffer_attr.minreq);
531 pa_tagstruct_putu32(t, s->buffer_attr.fragsize);
533 pa_pstream_send_tagstruct(s->context->pstream, t);
534 pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, create_stream_callback, s);
537 static void lookup_device_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
538 struct pa_stream *s = userdata;
540 assert(pd && s && s->state == STREAM_LOOKING_UP);
542 if (command != PA_COMMAND_REPLY) {
543 if (handle_error(s->context, command, t) < 0) {
544 context_dead(s->context);
549 if (s->create_complete_callback)
550 s->create_complete_callback(s, 0, s->create_complete_userdata);
554 if (pa_tagstruct_getu32(t, &tdev) < 0 ||
555 !pa_tagstruct_eof(t)) {
556 s->context->error = PA_ERROR_PROTOCOL;
557 context_dead(s->context);
561 create_stream(s, tdev);
564 static void lookup_device(struct pa_stream *s, const char *tdev) {
565 struct pa_tagstruct *t;
569 s->state = STREAM_LOOKING_UP;
571 t = pa_tagstruct_new(NULL, 0);
574 pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_LOOKUP_SINK : PA_COMMAND_LOOKUP_SOURCE);
575 pa_tagstruct_putu32(t, tag = s->context->ctag++);
576 pa_tagstruct_puts(t, tdev);
578 pa_pstream_send_tagstruct(s->context->pstream, t);
579 pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, lookup_device_callback, s);
582 struct pa_stream* pa_stream_new(
583 struct pa_context *c,
584 enum pa_stream_direction dir,
587 const struct pa_sample_spec *ss,
588 const struct pa_buffer_attr *attr,
589 void (*complete) (struct pa_stream*s, int success, void *userdata),
594 assert(c && name && ss && c->state == CONTEXT_READY);
596 s = malloc(sizeof(struct pa_stream));
600 s->read_callback = NULL;
601 s->read_userdata = NULL;
602 s->write_callback = NULL;
603 s->write_userdata = NULL;
604 s->die_callback = NULL;
605 s->die_userdata = NULL;
606 s->create_complete_callback = complete;
607 s->create_complete_userdata = NULL;
608 s->get_latency_callback = NULL;
609 s->get_latency_userdata = NULL;
611 s->name = strdup(name);
612 s->state = STREAM_CREATING;
613 s->requested_bytes = 0;
615 s->channel_valid = 0;
616 s->device_index = (uint32_t) -1;
618 s->sample_spec = *ss;
620 s->buffer_attr = *attr;
622 s->buffer_attr.maxlength = DEFAULT_MAXLENGTH;
623 s->buffer_attr.tlength = DEFAULT_TLENGTH;
624 s->buffer_attr.prebuf = DEFAULT_PREBUF;
625 s->buffer_attr.minreq = DEFAULT_MINREQ;
626 s->buffer_attr.fragsize = DEFAULT_FRAGSIZE;
629 s->next = c->first_stream;
631 s->next->previous = s;
636 lookup_device(s, dev);
638 create_stream(s, (uint32_t) -1);
643 void pa_stream_free(struct pa_stream *s) {
644 assert(s && s->context);
646 if (s->context->pdispatch)
647 pa_pdispatch_unregister_reply(s->context->pdispatch, s);
651 if (s->channel_valid && s->context->state == CONTEXT_READY) {
652 struct pa_tagstruct *t = pa_tagstruct_new(NULL, 0);
655 pa_tagstruct_putu32(t, PA_COMMAND_DELETE_PLAYBACK_STREAM);
656 pa_tagstruct_putu32(t, s->context->ctag++);
657 pa_tagstruct_putu32(t, s->channel);
658 pa_pstream_send_tagstruct(s->context->pstream, t);
661 if (s->channel_valid)
662 pa_dynarray_put((s->direction == PA_STREAM_PLAYBACK) ? s->context->playback_streams : s->context->record_streams, s->channel, NULL);
665 s->next->previous = s->previous;
667 s->previous->next = s->next;
669 s->context->first_stream = s->next;
674 void pa_stream_set_write_callback(struct pa_stream *s, void (*cb)(struct pa_stream *p, size_t length, void *userdata), void *userdata) {
676 s->write_callback = cb;
677 s->write_userdata = userdata;
680 void pa_stream_write(struct pa_stream *s, const void *data, size_t length) {
681 struct pa_memchunk chunk;
682 assert(s && s->context && data && length && s->state == STREAM_READY);
684 chunk.memblock = pa_memblock_new(length);
685 assert(chunk.memblock && chunk.memblock->data);
686 memcpy(chunk.memblock->data, data, length);
688 chunk.length = length;
690 pa_pstream_send_memblock(s->context->pstream, s->channel, 0, &chunk);
691 pa_memblock_unref(chunk.memblock);
693 /*fprintf(stderr, "Sent %u bytes\n", length);*/
695 if (length < s->requested_bytes)
696 s->requested_bytes -= length;
698 s->requested_bytes = 0;
701 size_t pa_stream_writable_size(struct pa_stream *s) {
702 assert(s && s->state == STREAM_READY);
703 return s->requested_bytes;
706 void pa_stream_set_read_callback(struct pa_stream *s, void (*cb)(struct pa_stream *p, const void*data, size_t length, void *userdata), void *userdata) {
708 s->read_callback = cb;
709 s->read_userdata = userdata;
712 int pa_stream_is_dead(struct pa_stream *s) {
713 return s->state == STREAM_DEAD;
716 int pa_stream_is_ready(struct pa_stream*s) {
717 return s->state == STREAM_READY;
720 void pa_stream_set_die_callback(struct pa_stream *s, void (*cb)(struct pa_stream *s, void *userdata), void *userdata) {
722 s->die_callback = cb;
723 s->die_userdata = userdata;
726 int pa_context_is_pending(struct pa_context *c) {
729 if (c->state != CONTEXT_READY)
732 return pa_pstream_is_pending(c->pstream) || pa_pdispatch_is_pending(c->pdispatch);
735 struct pa_context* pa_stream_get_context(struct pa_stream *p) {
740 static void set_dispatch_callbacks(struct pa_context *c);
742 static void pdispatch_drain_callback(struct pa_pdispatch*pd, void *userdata) {
743 set_dispatch_callbacks(userdata);
746 static void pstream_drain_callback(struct pa_pstream *s, void *userdata) {
747 set_dispatch_callbacks(userdata);
750 static void set_dispatch_callbacks(struct pa_context *c) {
751 assert(c && c->state == CONTEXT_READY);
753 pa_pstream_set_drain_callback(c->pstream, NULL, NULL);
754 pa_pdispatch_set_drain_callback(c->pdispatch, NULL, NULL);
756 if (pa_pdispatch_is_pending(c->pdispatch)) {
757 pa_pdispatch_set_drain_callback(c->pdispatch, pdispatch_drain_callback, c);
761 if (pa_pstream_is_pending(c->pstream)) {
762 pa_pstream_set_drain_callback(c->pstream, pstream_drain_callback, c);
766 assert(c->drain_complete_callback);
767 c->drain_complete_callback(c, c->drain_complete_userdata);
770 int pa_context_drain(
771 struct pa_context *c,
772 void (*complete) (struct pa_context*c, void *userdata),
775 assert(c && c->state == CONTEXT_READY);
777 if (complete == NULL) {
778 c->drain_complete_callback = NULL;
779 pa_pstream_set_drain_callback(c->pstream, NULL, NULL);
780 pa_pdispatch_set_drain_callback(c->pdispatch, NULL, NULL);
784 if (!pa_context_is_pending(c))
787 c->drain_complete_callback = complete;
788 c->drain_complete_userdata = userdata;
790 set_dispatch_callbacks(c);
795 static void stream_drain_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
796 struct pa_stream *s = userdata;
799 if (command != PA_COMMAND_REPLY) {
800 if (handle_error(s->context, command, t) < 0) {
801 context_dead(s->context);
809 if (s->state != STREAM_READY)
812 if (!pa_tagstruct_eof(t)) {
813 s->context->error = PA_ERROR_PROTOCOL;
814 context_dead(s->context);
818 if (s->drain_complete_callback) {
819 void (*temp) (struct pa_stream*s, void *userdata) = s->drain_complete_callback;
820 s->drain_complete_callback = NULL;
821 temp(s, s->drain_complete_userdata);
826 void pa_stream_drain(struct pa_stream *s, void (*complete) (struct pa_stream*s, void *userdata), void *userdata) {
827 struct pa_tagstruct *t;
829 assert(s && s->state == STREAM_READY);
832 s->drain_complete_callback = NULL;
836 s->drain_complete_callback = complete;
837 s->drain_complete_userdata = userdata;
839 t = pa_tagstruct_new(NULL, 0);
842 pa_tagstruct_putu32(t, PA_COMMAND_DRAIN_PLAYBACK_STREAM);
843 pa_tagstruct_putu32(t, tag = s->context->ctag++);
844 pa_tagstruct_putu32(t, s->channel);
845 pa_pstream_send_tagstruct(s->context->pstream, t);
846 pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_drain_callback, s);
849 void pa_context_exit(struct pa_context *c) {
850 struct pa_tagstruct *t;
851 t = pa_tagstruct_new(NULL, 0);
853 pa_tagstruct_putu32(t, PA_COMMAND_EXIT);
854 pa_tagstruct_putu32(t, c->ctag++);
855 pa_pstream_send_tagstruct(c->pstream, t);
858 static void context_stat_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
859 struct pa_context *c = userdata;
860 uint32_t total, count;
863 if (command != PA_COMMAND_REPLY) {
864 if (handle_error(c, command, t) < 0) {
869 if (c->stat_callback)
870 c->stat_callback(c, (uint32_t) -1, (uint32_t) -1, c->stat_userdata);
874 if (pa_tagstruct_getu32(t, &count) < 0 ||
875 pa_tagstruct_getu32(t, &total) < 0 ||
876 !pa_tagstruct_eof(t)) {
877 c->error = PA_ERROR_PROTOCOL;
882 if (c->stat_callback)
883 c->stat_callback(c, count, total, c->stat_userdata);
886 void pa_context_stat(struct pa_context *c, void (*cb)(struct pa_context *c, uint32_t count, uint32_t total, void *userdata), void *userdata) {
888 struct pa_tagstruct *t;
890 c->stat_callback = cb;
891 c->stat_userdata = userdata;
896 t = pa_tagstruct_new(NULL, 0);
898 pa_tagstruct_putu32(t, PA_COMMAND_STAT);
899 pa_tagstruct_putu32(t, tag = c->ctag++);
900 pa_pstream_send_tagstruct(c->pstream, t);
901 pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, context_stat_callback, c);
904 static void stream_get_latency_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
905 struct pa_stream *s = userdata;
909 if (command != PA_COMMAND_REPLY) {
910 if (handle_error(s->context, command, t) < 0) {
911 context_dead(s->context);
915 if (s->get_latency_callback)
916 s->get_latency_callback(s, (uint32_t) -1, s->get_latency_userdata);
920 if (pa_tagstruct_getu32(t, &latency) < 0 ||
921 !pa_tagstruct_eof(t)) {
922 s->context->error = PA_ERROR_PROTOCOL;
923 context_dead(s->context);
927 if (s->get_latency_callback)
928 s->get_latency_callback(s, latency, s->get_latency_userdata);
931 void pa_stream_get_latency(struct pa_stream *p, void (*cb)(struct pa_stream *p, uint32_t latency, void *userdata), void *userdata) {
933 struct pa_tagstruct *t;
935 p->get_latency_callback = cb;
936 p->get_latency_userdata = userdata;
941 t = pa_tagstruct_new(NULL, 0);
943 pa_tagstruct_putu32(t, PA_COMMAND_GET_PLAYBACK_LATENCY);
944 pa_tagstruct_putu32(t, tag = p->context->ctag++);
945 pa_tagstruct_putu32(t, p->channel);
946 pa_pstream_send_tagstruct(p->context->pstream, t);
947 pa_pdispatch_register_reply(p->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_get_latency_callback, p);