2 This file is part of PulseAudio.
4 Copyright 2004-2006 Lennart Poettering
5 Copyright 2008 Colin Guthrie
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published
9 by the Free Software Foundation; either version 2 of the License,
10 or (at your option) any later version.
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with PulseAudio; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
36 #include <sys/socket.h>
37 #include <netinet/in.h>
38 #include <netinet/tcp.h>
39 #include <sys/ioctl.h>
41 #ifdef HAVE_LINUX_SOCKIOS_H
42 #include <linux/sockios.h>
45 #include <pulse/xmalloc.h>
46 #include <pulse/timeval.h>
48 #include <pulsecore/core-error.h>
49 #include <pulsecore/iochannel.h>
50 #include <pulsecore/sink.h>
51 #include <pulsecore/module.h>
52 #include <pulsecore/core-util.h>
53 #include <pulsecore/modargs.h>
54 #include <pulsecore/log.h>
55 #include <pulsecore/socket-client.h>
56 #include <pulsecore/authkey.h>
57 #include <pulsecore/thread-mq.h>
58 #include <pulsecore/thread.h>
59 #include <pulsecore/time-smoother.h>
60 #include <pulsecore/rtclock.h>
61 #include <pulsecore/socket-util.h>
63 #include "module-raop-sink-symdef.h"
67 #include "raop_client.h"
69 PA_MODULE_AUTHOR("Colin Guthrie");
70 PA_MODULE_DESCRIPTION("RAOP Sink (Apple Airtunes)");
71 PA_MODULE_VERSION(PACKAGE_VERSION
);
72 PA_MODULE_LOAD_ONCE(FALSE
);
74 "sink_name=<name for the sink> "
76 "format=<sample format> "
77 "channels=<number of channels> "
78 "rate=<sample rate>");
80 #define DEFAULT_SINK_NAME "airtunes"
87 pa_thread_mq thread_mq
;
89 pa_rtpoll_item
*rtpoll_item
;
92 pa_memchunk raw_memchunk
;
93 pa_memchunk encoded_memchunk
;
96 size_t write_length
, write_index
;
99 size_t read_length
, read_index
;
106 /*esd_format_t format;*/
109 pa_smoother
*smoother
;
113 int64_t encoding_overhead
;
114 int32_t next_encoding_overhead
;
115 double encoding_ratio
;
117 pa_raop_client
*raop
;
122 static const char* const valid_modargs
[] = {
132 SINK_MESSAGE_PASS_SOCKET
= PA_SINK_MESSAGE_MAX
,
133 SINK_MESSAGE_RIP_SOCKET
136 static void on_connection(PA_GCC_UNUSED
int fd
, void*userdata
) {
137 struct userdata
*u
= userdata
;
140 pa_assert(u
->fd
< 0);
143 /* Set the initial volume */
144 pa_raop_client_set_volume(u
->raop
, u
->volume
);
146 pa_log_debug("Connection authenticated, handing fd to IO thread...");
148 pa_asyncmsgq_post(u
->thread_mq
.inq
, PA_MSGOBJECT(u
->sink
), SINK_MESSAGE_PASS_SOCKET
, NULL
, 0, NULL
, NULL
);
151 static void on_close(void*userdata
) {
152 struct userdata
*u
= userdata
;
155 pa_log_debug("Connection closed, informing IO thread...");
157 pa_asyncmsgq_post(u
->thread_mq
.inq
, PA_MSGOBJECT(u
->sink
), SINK_MESSAGE_RIP_SOCKET
, NULL
, 0, NULL
, NULL
);
160 static int sink_process_msg(pa_msgobject
*o
, int code
, void *data
, int64_t offset
, pa_memchunk
*chunk
) {
161 struct userdata
*u
= PA_SINK(o
)->userdata
;
165 case PA_SINK_MESSAGE_SET_STATE
:
167 switch ((pa_sink_state_t
) PA_PTR_TO_UINT(data
)) {
169 case PA_SINK_SUSPENDED
:
170 pa_assert(PA_SINK_IS_OPENED(u
->sink
->thread_info
.state
));
172 pa_smoother_pause(u
->smoother
, pa_rtclock_usec());
174 /* Issue a FLUSH if we are connected */
176 pa_raop_flush(u
->raop
);
181 case PA_SINK_RUNNING
:
183 if (u
->sink
->thread_info
.state
== PA_SINK_SUSPENDED
) {
184 pa_smoother_resume(u
->smoother
, pa_rtclock_usec());
186 /* The connection can be closed when idle, so check to
187 see if we need to reestablish it */
189 pa_raop_connect(u
->raop
);
191 pa_raop_flush(u
->raop
);
196 case PA_SINK_UNLINKED
:
203 case PA_SINK_MESSAGE_GET_LATENCY
: {
206 r
= pa_smoother_get(u
->smoother
, pa_rtclock_usec());
207 w
= pa_bytes_to_usec((u
->offset
- u
->encoding_overhead
+ (u
->encoded_memchunk
.length
/ u
->encoding_ratio
)), &u
->sink
->sample_spec
);
209 *((pa_usec_t
*) data
) = w
> r
? w
- r
: 0;
213 case SINK_MESSAGE_PASS_SOCKET
: {
214 struct pollfd
*pollfd
;
216 pa_assert(!u
->rtpoll_item
);
218 u
->rtpoll_item
= pa_rtpoll_item_new(u
->rtpoll
, PA_RTPOLL_NEVER
, 1);
219 pollfd
= pa_rtpoll_item_get_pollfd(u
->rtpoll_item
, NULL
);
221 pollfd
->events
= POLLOUT
;
222 /*pollfd->events = */pollfd
->revents
= 0;
224 if (u
->sink
->thread_info
.state
== PA_SINK_SUSPENDED
) {
225 /* Our stream has been suspended so we just flush it.... */
226 pa_raop_flush(u
->raop
);
231 case SINK_MESSAGE_RIP_SOCKET
: {
232 pa_assert(u
->fd
>= 0);
237 if (u
->sink
->thread_info
.state
== PA_SINK_SUSPENDED
) {
239 pa_log_debug("RTSP control connection closed, but we're suspended so let's not worry about it... we'll open it again later");
242 pa_rtpoll_item_free(u
->rtpoll_item
);
243 u
->rtpoll_item
= NULL
;
245 /* Quesiton: is this valid here: or should we do some sort of:
246 return pa_sink_process_msg(PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL);
248 pa_module_unload_request(u
->module
);
254 return pa_sink_process_msg(o
, code
, data
, offset
, chunk
);
257 static int sink_get_volume_cb(pa_sink
*s
) {
258 struct userdata
*u
= s
->userdata
;
263 for (i
= 0; i
< s
->sample_spec
.channels
; i
++) {
264 s
->volume
.values
[i
] = u
->volume
;
270 static int sink_set_volume_cb(pa_sink
*s
) {
271 struct userdata
*u
= s
->userdata
;
276 /* If we're muted, we fake it */
280 pa_assert(s
->sample_spec
.channels
> 0);
282 /* Avoid pointless volume sets */
283 if (u
->volume
== s
->volume
.values
[0])
286 rv
= pa_raop_client_set_volume(u
->raop
, s
->volume
.values
[0]);
288 u
->volume
= s
->volume
.values
[0];
293 static int sink_get_mute_cb(pa_sink
*s
) {
294 struct userdata
*u
= s
->userdata
;
302 static int sink_set_mute_cb(pa_sink
*s
) {
303 struct userdata
*u
= s
->userdata
;
308 rv
= pa_raop_client_set_volume(u
->raop
, (s
->muted
? PA_VOLUME_MUTED
: u
->volume
));
313 static void thread_func(void *userdata
) {
314 struct userdata
*u
= userdata
;
317 uint32_t silence_overhead
= 0;
318 double silence_ratio
= 0;
322 pa_log_debug("Thread starting up");
324 pa_thread_mq_install(&u
->thread_mq
);
325 pa_rtpoll_install(u
->rtpoll
);
327 pa_smoother_set_time_offset(u
->smoother
, pa_rtclock_usec());
329 /* Create a chunk of memory that is our encoded silence sample. */
330 pa_memchunk_reset(&silence
);
335 if (PA_SINK_IS_OPENED(u
->sink
->thread_info
.state
))
336 if (u
->sink
->thread_info
.rewind_requested
)
337 pa_sink_process_rewind(u
->sink
, 0);
339 if (u
->rtpoll_item
) {
340 struct pollfd
*pollfd
;
341 pollfd
= pa_rtpoll_item_get_pollfd(u
->rtpoll_item
, NULL
);
343 /* Render some data and write it to the fifo */
344 if (/*PA_SINK_IS_OPENED(u->sink->thread_info.state) && */pollfd
->revents
) {
349 if (!silence
.memblock
) {
350 pa_memchunk silence_tmp
;
352 pa_memchunk_reset(&silence_tmp
);
353 silence_tmp
.memblock
= pa_memblock_new(u
->core
->mempool
, 4096);
354 silence_tmp
.length
= 4096;
355 p
= pa_memblock_acquire(silence_tmp
.memblock
);
357 pa_memblock_release(silence_tmp
.memblock
);
358 pa_raop_client_encode_sample(u
->raop
, &silence_tmp
, &silence
);
359 pa_assert(0 == silence_tmp
.length
);
360 silence_overhead
= silence_tmp
.length
- 4096;
361 silence_ratio
= silence_tmp
.length
/ 4096;
362 pa_memblock_unref(silence_tmp
.memblock
);
368 if (u
->encoded_memchunk
.length
<= 0) {
369 if (u
->encoded_memchunk
.memblock
)
370 pa_memblock_unref(u
->encoded_memchunk
.memblock
);
371 if (PA_SINK_IS_OPENED(u
->sink
->thread_info
.state
)) {
374 /* We render real data */
375 if (u
->raw_memchunk
.length
<= 0) {
376 if (u
->raw_memchunk
.memblock
)
377 pa_memblock_unref(u
->raw_memchunk
.memblock
);
378 pa_memchunk_reset(&u
->raw_memchunk
);
380 /* Grab unencoded data */
381 pa_sink_render(u
->sink
, u
->block_size
, &u
->raw_memchunk
);
383 pa_assert(u
->raw_memchunk
.length
> 0);
386 rl
= u
->raw_memchunk
.length
;
387 u
->encoding_overhead
+= u
->next_encoding_overhead
;
388 pa_raop_client_encode_sample(u
->raop
, &u
->raw_memchunk
, &u
->encoded_memchunk
);
389 u
->next_encoding_overhead
= (u
->encoded_memchunk
.length
- (rl
- u
->raw_memchunk
.length
));
390 u
->encoding_ratio
= u
->encoded_memchunk
.length
/ (rl
- u
->raw_memchunk
.length
);
392 /* We render some silence into our memchunk */
393 memcpy(&u
->encoded_memchunk
, &silence
, sizeof(pa_memchunk
));
394 pa_memblock_ref(silence
.memblock
);
396 /* Calculate/store some values to be used with the smoother */
397 u
->next_encoding_overhead
= silence_overhead
;
398 u
->encoding_ratio
= silence_ratio
;
401 pa_assert(u
->encoded_memchunk
.length
> 0);
403 p
= pa_memblock_acquire(u
->encoded_memchunk
.memblock
);
404 l
= pa_write(u
->fd
, (uint8_t*) p
+ u
->encoded_memchunk
.index
, u
->encoded_memchunk
.length
, &write_type
);
405 pa_memblock_release(u
->encoded_memchunk
.memblock
);
413 else if (errno
== EAGAIN
) {
415 /* OK, we filled all socket buffers up
420 pa_log("Failed to write data to FIFO: %s", pa_cstrerror(errno
));
427 u
->encoded_memchunk
.index
+= l
;
428 u
->encoded_memchunk
.length
-= l
;
432 if (u
->encoded_memchunk
.length
> 0) {
433 /* we've completely written the encoded data, so update our overhead */
434 u
->encoding_overhead
+= u
->next_encoding_overhead
;
436 /* OK, we wrote less that we asked for,
437 * hence we can assume that the socket
438 * buffers are full now */
446 /* At this spot we know that the socket buffers are
447 * fully filled up. This is the best time to estimate
448 * the playback position of the server */
450 n
= u
->offset
- u
->encoding_overhead
;
455 if (ioctl(u
->fd
, SIOCOUTQ
, &l
) >= 0 && l
> 0)
456 n
-= (l
/ u
->encoding_ratio
);
460 usec
= pa_bytes_to_usec(n
, &u
->sink
->sample_spec
);
462 if (usec
> u
->latency
)
467 pa_smoother_put(u
->smoother
, pa_rtclock_usec(), usec
);
470 /* Hmm, nothing to do. Let's sleep */
471 pollfd
->events
= POLLOUT
; /*PA_SINK_IS_OPENED(u->sink->thread_info.state) ? POLLOUT : 0;*/
474 if ((ret
= pa_rtpoll_run(u
->rtpoll
, TRUE
)) < 0)
480 if (u
->rtpoll_item
) {
481 struct pollfd
* pollfd
;
483 pollfd
= pa_rtpoll_item_get_pollfd(u
->rtpoll_item
, NULL
);
485 if (pollfd
->revents
& ~POLLOUT
) {
486 if (u
->sink
->thread_info
.state
!= PA_SINK_SUSPENDED
) {
487 pa_log("FIFO shutdown.");
491 /* We expect this to happen on occasion if we are not sending data.
492 It's perfectly natural and normal and natural */
494 pa_rtpoll_item_free(u
->rtpoll_item
);
495 u
->rtpoll_item
= NULL
;
501 /* If this was no regular exit from the loop we have to continue
502 * processing messages until we received PA_MESSAGE_SHUTDOWN */
503 pa_asyncmsgq_post(u
->thread_mq
.outq
, PA_MSGOBJECT(u
->core
), PA_CORE_MESSAGE_UNLOAD_MODULE
, u
->module
, 0, NULL
, NULL
);
504 pa_asyncmsgq_wait_for(u
->thread_mq
.inq
, PA_MESSAGE_SHUTDOWN
);
507 if (silence
.memblock
)
508 pa_memblock_unref(silence
.memblock
);
509 pa_log_debug("Thread shutting down");
512 int pa__init(pa_module
*m
) {
513 struct userdata
*u
= NULL
;
515 pa_modargs
*ma
= NULL
;
517 pa_sink_new_data data
;
521 if (!(ma
= pa_modargs_new(m
->argument
, valid_modargs
))) {
522 pa_log("failed to parse module arguments");
526 ss
= m
->core
->default_sample_spec
;
527 if (pa_modargs_get_sample_spec(ma
, &ss
) < 0) {
528 pa_log("invalid sample format specification");
532 if ((/*ss.format != PA_SAMPLE_U8 &&*/ ss
.format
!= PA_SAMPLE_S16NE
) ||
534 pa_log("sample type support is limited to mono/stereo and U8 or S16NE sample data");
538 u
= pa_xnew0(struct userdata
, 1);
543 u
->smoother
= pa_smoother_new(PA_USEC_PER_SEC
, PA_USEC_PER_SEC
*2, TRUE
, 10);
544 pa_memchunk_reset(&u
->raw_memchunk
);
545 pa_memchunk_reset(&u
->encoded_memchunk
);
547 u
->encoding_overhead
= 0;
548 u
->next_encoding_overhead
= 0;
549 u
->encoding_ratio
= 1.0;
551 u
->volume
= roundf(0.7 * PA_VOLUME_NORM
);
554 u
->rtpoll
= pa_rtpoll_new();
555 pa_thread_mq_init(&u
->thread_mq
, m
->core
->mainloop
, u
->rtpoll
);
556 u
->rtpoll_item
= NULL
;
559 (ss.format == PA_SAMPLE_U8 ? ESD_BITS8 : ESD_BITS16) |
560 (ss.channels == 2 ? ESD_STEREO : ESD_MONO);*/
562 u
->block_size
= pa_usec_to_bytes(PA_USEC_PER_SEC
/20, &ss
);
564 u
->read_data
= u
->write_data
= NULL
;
565 u
->read_index
= u
->write_index
= u
->read_length
= u
->write_length
= 0;
567 /*u->state = STATE_AUTH;*/
570 if (!(server
= pa_modargs_get_value(ma
, "server", NULL
))) {
571 pa_log("No server argument given.");
575 pa_sink_new_data_init(&data
);
576 data
.driver
= __FILE__
;
578 pa_sink_new_data_set_name(&data
, pa_modargs_get_value(ma
, "sink_name", DEFAULT_SINK_NAME
));
579 pa_sink_new_data_set_sample_spec(&data
, &ss
);
580 pa_proplist_sets(data
.proplist
, PA_PROP_DEVICE_STRING
, server
);
581 pa_proplist_setf(data
.proplist
, PA_PROP_DEVICE_DESCRIPTION
, "Airtunes sink '%s'", server
);
583 u
->sink
= pa_sink_new(m
->core
, &data
, PA_SINK_LATENCY
|PA_SINK_NETWORK
);
584 pa_sink_new_data_done(&data
);
587 pa_log("Failed to create sink.");
591 u
->sink
->parent
.process_msg
= sink_process_msg
;
592 u
->sink
->userdata
= u
;
593 u
->sink
->get_volume
= sink_get_volume_cb
;
594 u
->sink
->set_volume
= sink_set_volume_cb
;
595 u
->sink
->get_mute
= sink_get_mute_cb
;
596 u
->sink
->set_mute
= sink_set_mute_cb
;
597 u
->sink
->flags
= PA_SINK_LATENCY
|PA_SINK_NETWORK
|PA_SINK_HW_VOLUME_CTRL
;
599 pa_sink_set_asyncmsgq(u
->sink
, u
->thread_mq
.inq
);
600 pa_sink_set_rtpoll(u
->sink
, u
->rtpoll
);
602 if (!(u
->raop
= pa_raop_client_new(u
->core
, server
))) {
603 pa_log("Failed to connect to server.");
607 pa_raop_client_set_callback(u
->raop
, on_connection
, u
);
608 pa_raop_client_set_closed_callback(u
->raop
, on_close
, u
);
610 if (!(u
->thread
= pa_thread_new(thread_func
, u
))) {
611 pa_log("Failed to create thread.");
615 pa_sink_put(u
->sink
);
630 void pa__done(pa_module
*m
) {
634 if (!(u
= m
->userdata
))
638 pa_sink_unlink(u
->sink
);
641 pa_asyncmsgq_send(u
->thread_mq
.inq
, NULL
, PA_MESSAGE_SHUTDOWN
, NULL
, 0, NULL
);
642 pa_thread_free(u
->thread
);
645 pa_thread_mq_done(&u
->thread_mq
);
648 pa_sink_unref(u
->sink
);
651 pa_rtpoll_item_free(u
->rtpoll_item
);
654 pa_rtpoll_free(u
->rtpoll
);
656 if (u
->raw_memchunk
.memblock
)
657 pa_memblock_unref(u
->raw_memchunk
.memblock
);
659 if (u
->encoded_memchunk
.memblock
)
660 pa_memblock_unref(u
->encoded_memchunk
.memblock
);
663 pa_raop_client_free(u
->raop
);
665 pa_xfree(u
->read_data
);
666 pa_xfree(u
->write_data
);
669 pa_smoother_free(u
->smoother
);