4 This file is part of PulseAudio.
6 Copyright 2004-2006 Lennart Poettering
8 PulseAudio is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published
10 by the Free Software Foundation; either version 2 of the License,
11 or (at your option) any later version.
13 PulseAudio is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with PulseAudio; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
34 #include <pulse/xmalloc.h>
36 #include <pulsecore/sink-input.h>
37 #include <pulsecore/source-output.h>
38 #include <pulsecore/client.h>
39 #include <pulsecore/sample-util.h>
40 #include <pulsecore/namereg.h>
41 #include <pulsecore/log.h>
42 #include <pulsecore/core-error.h>
44 #include "protocol-simple.h"
46 /* Don't allow more than this many concurrent connections */
47 #define MAX_CONNECTIONS 10
50 pa_protocol_simple *protocol;
52 pa_sink_input *sink_input;
53 pa_source_output *source_output;
55 pa_memblockq *input_memblockq, *output_memblockq;
60 pa_memblock *current_memblock;
61 size_t memblock_index, fragment_size;
62 pa_atomic_int missing;
66 struct pa_protocol_simple {
69 pa_socket_server*server;
70 pa_idxset *connections;
72 pa_asyncmsgq *asyncmsgq;
80 pa_sample_spec sample_spec;
81 char *source_name, *sink_name;
85 SINK_INPUT_MESSAGE_POST_DATA = PA_SINK_INPUT_MESSAGE_MAX, /* data from main loop to sink input */
89 MESSAGE_REQUEST_DATA, /* data from source output to main loop */
90 MESSAGE_POST_DATA /* data from source output to main loop */
94 #define PLAYBACK_BUFFER_SECONDS (.5)
95 #define PLAYBACK_BUFFER_FRAGMENTS (10)
96 #define RECORD_BUFFER_SECONDS (5)
97 #define RECORD_BUFFER_FRAGMENTS (100)
99 static void connection_free(struct connection *c) {
102 pa_idxset_remove_by_data(c->protocol->connections, c, NULL);
105 pa_sink_input_disconnect(c->sink_input);
106 pa_sink_input_unref(c->sink_input);
109 if (c->source_output) {
110 pa_source_output_disconnect(c->source_output);
111 pa_source_output_unref(c->source_output);
114 if (c->playback.current_memblock)
115 pa_memblock_unref(c->playback.current_memblock);
118 pa_client_free(c->client);
120 pa_iochannel_free(c->io);
121 if (c->input_memblockq)
122 pa_memblockq_free(c->input_memblockq);
123 if (c->output_memblockq)
124 pa_memblockq_free(c->output_memblockq);
129 static int do_read(struct connection *c) {
137 if (!c->sink_input || !(l = pa_atomic_load(&c->playback.missing)))
140 if (l > c->playback.fragment_size)
141 l = c->playback.fragment_size;
143 if (c->playback.current_memblock)
144 if (pa_memblock_get_length(c->playback.current_memblock) - c->playback.memblock_index < l) {
145 pa_memblock_unref(c->playback.current_memblock);
146 c->playback.current_memblock = NULL;
147 c->playback.memblock_index = 0;
150 if (!c->playback.current_memblock) {
151 pa_assert_se(c->playback.current_memblock = pa_memblock_new(c->protocol->core->mempool, l));
152 c->playback.memblock_index = 0;
155 p = pa_memblock_acquire(c->playback.current_memblock);
156 r = pa_iochannel_read(c->io, (uint8_t*) p + c->playback.memblock_index, l);
157 pa_memblock_release(c->playback.current_memblock);
161 if (errno == EINTR || errno == EAGAIN)
164 pa_log_debug("read(): %s", r == 0 ? "EOF" : pa_cstrerror(errno));
168 chunk.memblock = c->playback.current_memblock;
169 chunk.index = c->playback.memblock_index;
172 c->playback.memblock_index += r;
174 pa_asyncmsgq_post(c->protocol->asyncmsgq, c, MESSAGE_POST_DATA, NULL, &chunk, NULL, NULL);
179 static int do_write(struct connection *c) {
186 if (!c->source_output)
189 if (pa_memblockq_peek(c->output_memblockq, &chunk) < 0)
192 pa_assert(chunk.memblock);
193 pa_assert(chunk.length);
195 p = pa_memblock_acquire(chunk.memblock);
196 r = pa_iochannel_write(c->io, (uint8_t*) p+chunk.index, chunk.length);
197 pa_memblock_release(chunk.memblock);
199 pa_memblock_unref(chunk.memblock);
203 if (errno == EINTR || errno == EAGAIN)
206 pa_log("write(): %s", pa_cstrerror(errno));
210 pa_memblockq_drop(c->output_memblockq, &chunk, r);
215 static void do_work(struct connection *c) {
221 if (pa_iochannel_is_readable(c->io)) {
224 } else if (pa_iochannel_is_hungup(c->io))
227 if (pa_iochannel_is_writable(c->io)) {
238 /* If there is a sink input, we first drain what we already have read before shutting down the connection */
241 pa_iochannel_free(c->io);
244 pa_memblockq_prebuf_disable(c->input_memblockq);
249 /*** sink_input callbacks ***/
251 /* Called from thread context */
252 static int sink_input_process_msg(pa_sink_input *i, int code, void *userdata, const pa_memchunk *chunk) {
261 case SINK_INPUT_MESSAGE_POST_DATA: {
264 /* New data from the main loop */
265 pa_memblockq_push_align(c->input_memblockq, chunk);
269 case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
270 pa_usec_t *r = userdata;
272 *r = pa_bytes_to_usec(pa_memblockq_get_length(c->input_memblockq), &c->sink_input->sample_spec);
274 /* Fall through, the default handler will add in the extra
275 * latency added by the resampler */
279 return pa_sink_input_process_msg(i, code, userdata);
283 /* Called from thread context */
284 static int sink_input_peek_cb(pa_sink_input *i, pa_memchunk *chunk) {
292 r = pa_memblockq_peek(c->input_memblockq, chunk);
294 if (c->dead && r < 0)
300 /* Called from thread context */
301 static void sink_input_drop_cb(pa_sink_input *i, const pa_memchunk *chunk, size_t length) {
302 struct connection*c = i->userdata;
309 old = pa_memblockq_missing(c->input_memblockq);
310 pa_memblockq_drop(c->input_memblockq, chunk, length);
311 new = pa_memblockq_missing(c->input_memblockq);
313 pa_atomic_store(&c->playback.missing, &new);
316 pa_asyncmsgq_post(c->protocol->asyncmsgq, c, MESSAGE_REQUEST_DATA, NULL, NULL, NULL, NULL);
319 /* Called from main context */
320 static void sink_input_kill_cb(pa_sink_input *i) {
322 pa_assert(i->userdata);
324 connection_free((struct connection *) i->userdata);
327 /*** source_output callbacks ***/
329 static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
330 struct connection *c;
337 pa_asyncmsgq_post(c->protocol->asyncmsgq, c, MESSAGE_REQUEST_DATA, NULL, chunk, NULL, NULL);
340 static void source_output_kill_cb(pa_source_output *o) {
350 static pa_usec_t source_output_get_latency_cb(pa_source_output *o) {
357 return pa_bytes_to_usec(pa_memblockq_get_length(c->output_memblockq), &c->source_output->sample_spec);
360 /*** client callbacks ***/
362 static void client_kill_cb(pa_client *client) {
366 c = client->userdata;
369 connection_free(client);
372 /*** pa_iochannel callbacks ***/
374 static void io_callback(pa_iochannel*io, void *userdata) {
375 struct connection *c = userdata;
383 /*** socket_server callbacks ***/
385 static void on_connection(pa_socket_server*s, pa_iochannel *io, void *userdata) {
386 pa_protocol_simple *p = userdata;
387 struct connection *c = NULL;
394 if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) {
395 pa_log("Warning! Too many connections (%u), dropping incoming connection.", MAX_CONNECTIONS);
396 pa_iochannel_free(io);
400 c = pa_xnew(struct connection, 1);
402 c->sink_input = NULL;
403 c->source_output = NULL;
404 c->input_memblockq = c->output_memblockq = NULL;
406 c->playback.current_memblock = NULL;
407 c->playback.memblock_index = 0;
408 c->playback.fragment_size = 0;
410 pa_atomic_store(&c->playback.missing, 0);
412 pa_iochannel_socket_peer_to_string(io, cname, sizeof(cname));
413 pa_assert_se(c->client = pa_client_new(p->core, __FILE__, cname));
414 c->client->owner = p->module;
415 c->client->kill = client_kill_cb;
416 c->client->userdata = c;
419 if (p->mode & PLAYBACK) {
420 pa_sink_input_new_data data;
423 pa_sink_input_new_data_init(&data);
424 data.driver = __FILE__;
425 data.name = c->client->name;
426 pa_sink_input_new_data_set_sample_spec(&data, &p->sample_spec);
427 data.module = p->module;
428 data.client = c->client;
430 if (!(c->sink_input = pa_sink_input_new(p->core, &data, 0))) {
431 pa_log("Failed to create sink input.");
435 c->sink_input->peek = sink_input_peek_cb;
436 c->sink_input->drop = sink_input_drop_cb;
437 c->sink_input->kill = sink_input_kill_cb;
438 c->sink_input->get_latency = sink_input_get_latency_cb;
439 c->sink_input->userdata = c;
441 l = (size_t) (pa_bytes_per_second(&p->sample_spec)*PLAYBACK_BUFFER_SECONDS);
442 c->input_memblockq = pa_memblockq_new(
446 pa_frame_size(&p->sample_spec),
448 l/PLAYBACK_BUFFER_FRAGMENTS,
450 pa_assert(c->input_memblockq);
451 pa_iochannel_socket_set_rcvbuf(io, l/PLAYBACK_BUFFER_FRAGMENTS*5);
452 c->playback.fragment_size = l/10;
454 pa_atomic_store(&c->playback.missing, pa_memblockq_missing(c->input_memblockq));
456 pa_sink_input_put(c->sink_input);
459 if (p->mode & RECORD) {
460 pa_source_output_new_data data;
463 pa_source_output_new_data_init(&data);
464 data.driver = __FILE__;
465 data.name = c->client->name;
466 pa_source_output_new_data_set_sample_spec(&data, &p->sample_spec);
467 data.module = p->module;
468 data.client = c->client;
470 if (!(c->source_output = pa_source_output_new(p->core, &data, 0))) {
471 pa_log("Failed to create source output.");
474 c->source_output->push = source_output_push_cb;
475 c->source_output->kill = source_output_kill_cb;
476 c->source_output->get_latency = source_output_get_latency_cb;
477 c->source_output->userdata = c;
479 l = (size_t) (pa_bytes_per_second(&p->sample_spec)*RECORD_BUFFER_SECONDS);
480 c->output_memblockq = pa_memblockq_new(
484 pa_frame_size(&p->sample_spec),
488 pa_iochannel_socket_set_sndbuf(io, l/RECORD_BUFFER_FRAGMENTS*2);
490 pa_source_output_put(c->source_output);
494 pa_iochannel_set_callback(c->io, io_callback, c);
495 pa_idxset_put(p->connections, c, NULL);
504 static void asyncmsgq_cb(pa_mainloop_api*api, pa_io_event* e, int fd, pa_io_event_flags_t events, void *userdata) {
505 pa_protocol_simple *p = userdata;
506 int do_some_work = 0;
508 pa_assert(pa_asyncmsgq_get_fd(p->asyncmsgq) == fd);
509 pa_assert(events == PA_IO_EVENT_INPUT);
511 pa_asyncmsgq_after_poll(p->asyncmsgq);
517 /* Check whether there is a message for us to process */
518 while (pa_asyncmsgq_get(p->asyncmsgq, &object, &code, &data) == 0) {
520 connection *c = object;
526 case MESSAGE_REQUEST_DATA:
530 case MESSAGE_POST_DATA:
531 pa_memblockq_push(c->output_memblockq, chunk);
536 pa_asyncmsgq_done(p->asyncmsgq);
539 if (pa_asyncmsgq_before_poll(p->asyncmsgq) == 0)
544 pa_protocol_simple* pa_protocol_simple_new(pa_core *core, pa_socket_server *server, pa_module *m, pa_modargs *ma) {
545 pa_protocol_simple* p = NULL;
552 p = pa_xnew0(pa_protocol_simple, 1);
556 p->connections = pa_idxset_new(NULL, NULL);
557 pa_assert_se(p->asyncmsgq = pa_asyncmsgq_new(0));
559 p->sample_spec = core->default_sample_spec;
560 if (pa_modargs_get_sample_spec(ma, &p->sample_spec) < 0) {
561 pa_log("Failed to parse sample type specification.");
565 p->source_name = pa_xstrdup(pa_modargs_get_value(ma, "source", NULL));
566 p->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
569 if (pa_modargs_get_value_boolean(ma, "record", &enable) < 0) {
570 pa_log("record= expects a numeric argument.");
573 p->mode = enable ? RECORD : 0;
576 if (pa_modargs_get_value_boolean(ma, "playback", &enable) < 0) {
577 pa_log("playback= expects a numeric argument.");
580 p->mode |= enable ? PLAYBACK : 0;
582 if ((p->mode & (RECORD|PLAYBACK)) == 0) {
583 pa_log("neither playback nor recording enabled for protocol.");
587 pa_socket_server_set_callback(p->server, on_connection, p);
589 pa_assert_se(pa_asyncmsgq_before_poll(p->asyncmsgq) == 0);
590 pa_assert_se(p->asyncmsgq_event = core->mainloop->io_event_new(core->mainloop, pa_asyncmsgq_get_fd(p->asyncmsgq), PA_IO_EVENT_INPUT, p));
596 pa_protocol_simple_free(p);
602 void pa_protocol_simple_free(pa_protocol_simple *p) {
603 struct connection *c;
606 if (p->connections) {
607 while((c = pa_idxset_first(p->connections, NULL)))
610 pa_idxset_free(p->connections, NULL, NULL);
614 pa_socket_server_unref(p->server);
617 c->mainloop->io_event_free(c->asyncmsgq_event);
618 pa_asyncmsgq_after_poll(c->asyncmsgq);
619 pa_asyncmsgq_free(p->asyncmsgq);