2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
4 * Copyright (C) 2006 Wim Taymans <wim at fluendo dot com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
23 * SECTION:element-multifdsink
24 * @see_also: tcpserversink
26 * This plugin writes incoming data to a set of file descriptors. The
27 * file descriptors can be added to multifdsink by emitting the #GstMultiFdSink::add signal.
28 * For each descriptor added, the #GstMultiFdSink::client-added signal will be called.
30 * As of version 0.10.8, a client can also be added with the #GstMultiFdSink::add-full signal
31 * that allows for more control over what and how much data a client
34 * Clients can be removed from multifdsink by emitting the #GstMultiFdSink::remove signal. For
35 * each descriptor removed, the #GstMultiFdSink::client-removed signal will be called. The
36 * #GstMultiFdSink::client-removed signal can also be fired when multifdsink decides that a
37 * client is not active anymore or, depending on the value of the
38 * #GstMultiFdSink:recover-policy property, if the client is reading too slowly.
39 * In all cases, multifdsink will never close a file descriptor itself.
40 * The user of multifdsink is responsible for closing all file descriptors.
41 * This can for example be done in response to the #GstMultiFdSink::client-fd-removed signal.
42 * Note that multifdsink still has a reference to the file descriptor when the
43 * #GstMultiFdSink::client-removed signal is emitted, so that "get-stats" can be performed on
44 * the descriptor; it is therefore not safe to close the file descriptor in
45 * the #GstMultiFdSink::client-removed signal handler, and you should use the
46 * #GstMultiFdSink::client-fd-removed signal to safely close the fd.
48 * Multifdsink internally keeps a queue of the incoming buffers and uses a
49 * separate thread to send the buffers to the clients. This ensures that no
50 * client write can block the pipeline and that clients can read with different
53 * When adding a client to multifdsink, the #GstMultiFdSink:sync-method property will define
54 * which buffer in the queued buffers will be sent first to the client. Clients
55 * can be sent the most recent buffer (which might not be decodable by the
56 * client if it is not a keyframe), the next keyframe received in
57 * multifdsink (which can take some time depending on the keyframe rate), or the
58 * last received keyframe (which will cause a simple burst-on-connect).
59 * Multifdsink will always keep at least one keyframe in its internal buffers
60 * when the sync-mode is set to latest-keyframe.
62 * As of version 0.10.8, there are additional values for the #GstMultiFdSink:sync-method
63 * property to allow finer control over burst-on-connect behaviour. By selecting
64 * the 'burst' method a minimum burst size can be chosen, 'burst-keyframe'
65 * additionally requires that the burst begin with a keyframe, and
66 * 'burst-with-keyframe' attempts to burst beginning with a keyframe, but will
67 * prefer a minimum burst size even if it requires not starting with a keyframe.
69 * Multifdsink can be instructed to keep at least a minimum amount of data
70 * expressed in time or byte units in its internal queues with the the
71 * #GstMultiFdSink:time-min and #GstMultiFdSink:bytes-min properties respectively.
72 * These properties are useful if the application adds clients with the
73 * #GstMultiFdSink::add-full signal to make sure that a burst connect can
74 * actually be honored.
76 * When streaming data, clients are allowed to read at a different rate than
77 * the rate at which multifdsink receives data. If the client is reading too
78 * fast, no data will be send to the client until multifdsink receives more
79 * data. If the client, however, reads too slowly, data for that client will be
80 * queued up in multifdsink. Two properties control the amount of data
81 * (buffers) that is queued in multifdsink: #GstMultiFdSink:buffers-max and
82 * #GstMultiFdSink:buffers-soft-max. A client that falls behind by
83 * #GstMultiFdSink:buffers-max is removed from multifdsink forcibly.
85 * A client with a lag of at least #GstMultiFdSink:buffers-soft-max enters the recovery
86 * procedure which is controlled with the #GstMultiFdSink:recover-policy property.
87 * A recover policy of NONE will do nothing, RESYNC_LATEST will send the most recently
88 * received buffer as the next buffer for the client, RESYNC_SOFT_LIMIT
89 * positions the client to the soft limit in the buffer queue and
90 * RESYNC_KEYFRAME positions the client at the most recent keyframe in the
93 * multifdsink will by default synchronize on the clock before serving the
94 * buffers to the clients. This behaviour can be disabled by setting the sync
95 * property to FALSE. Multifdsink will by default not do QoS and will never
98 * Last reviewed on 2006-09-12 (0.10.10)
104 #include <gst/gst-i18n-plugin.h>
106 #include <sys/ioctl.h>
113 #include <sys/types.h>
114 #include <sys/socket.h>
115 #include <sys/stat.h>
116 #include <netinet/in.h>
118 #ifdef HAVE_FIONREAD_IN_SYS_FILIO
119 #include <sys/filio.h>
122 #include "gstmultifdsink.h"
123 #include "gsttcp-marshal.h"
125 #define NOT_IMPLEMENTED 0
127 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
130 GST_STATIC_CAPS_ANY);
132 GST_DEBUG_CATEGORY_STATIC (multifdsink_debug);
133 #define GST_CAT_DEFAULT (multifdsink_debug)
135 /* MultiFdSink signals and args */
148 SIGNAL_CLIENT_REMOVED,
149 SIGNAL_CLIENT_FD_REMOVED,
155 /* this is really arbitrarily chosen */
156 #define DEFAULT_MODE 1
157 #define DEFAULT_BUFFERS_MAX -1
158 #define DEFAULT_BUFFERS_SOFT_MAX -1
159 #define DEFAULT_TIME_MIN -1
160 #define DEFAULT_BYTES_MIN -1
161 #define DEFAULT_BUFFERS_MIN -1
162 #define DEFAULT_UNIT_TYPE GST_TCP_UNIT_TYPE_BUFFERS
163 #define DEFAULT_UNITS_MAX -1
164 #define DEFAULT_UNITS_SOFT_MAX -1
165 #define DEFAULT_RECOVER_POLICY GST_RECOVER_POLICY_NONE
166 #define DEFAULT_TIMEOUT 0
167 #define DEFAULT_SYNC_METHOD GST_SYNC_METHOD_LATEST
169 #define DEFAULT_BURST_UNIT GST_TCP_UNIT_TYPE_UNDEFINED
170 #define DEFAULT_BURST_VALUE 0
172 #define DEFAULT_QOS_DSCP -1
173 #define DEFAULT_HANDLE_READ TRUE
175 #define DEFAULT_RESEND_STREAMHEADER TRUE
190 PROP_BUFFERS_SOFT_MAX,
209 PROP_RESEND_STREAMHEADER,
216 /* For backward compat, we can't really select the poll mode anymore with
218 #define GST_TYPE_FDSET_MODE (gst_fdset_mode_get_type())
220 gst_fdset_mode_get_type (void)
222 static GType fdset_mode_type = 0;
223 static const GEnumValue fdset_mode[] = {
224 {0, "Select", "select"},
226 {2, "EPoll", "epoll"},
230 if (!fdset_mode_type) {
231 fdset_mode_type = g_enum_register_static ("GstFDSetMode", fdset_mode);
233 return fdset_mode_type;
236 #define GST_TYPE_RECOVER_POLICY (gst_recover_policy_get_type())
238 gst_recover_policy_get_type (void)
240 static GType recover_policy_type = 0;
241 static const GEnumValue recover_policy[] = {
242 {GST_RECOVER_POLICY_NONE,
243 "Do not try to recover", "none"},
244 {GST_RECOVER_POLICY_RESYNC_LATEST,
245 "Resync client to latest buffer", "latest"},
246 {GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT,
247 "Resync client to soft limit", "soft-limit"},
248 {GST_RECOVER_POLICY_RESYNC_KEYFRAME,
249 "Resync client to most recent keyframe", "keyframe"},
253 if (!recover_policy_type) {
254 recover_policy_type =
255 g_enum_register_static ("GstRecoverPolicy", recover_policy);
257 return recover_policy_type;
260 #define GST_TYPE_SYNC_METHOD (gst_sync_method_get_type())
262 gst_sync_method_get_type (void)
264 static GType sync_method_type = 0;
265 static const GEnumValue sync_method[] = {
266 {GST_SYNC_METHOD_LATEST,
267 "Serve starting from the latest buffer", "latest"},
268 {GST_SYNC_METHOD_NEXT_KEYFRAME,
269 "Serve starting from the next keyframe", "next-keyframe"},
270 {GST_SYNC_METHOD_LATEST_KEYFRAME,
271 "Serve everything since the latest keyframe (burst)",
273 {GST_SYNC_METHOD_BURST, "Serve burst-value data to client", "burst"},
274 {GST_SYNC_METHOD_BURST_KEYFRAME,
275 "Serve burst-value data starting on a keyframe",
277 {GST_SYNC_METHOD_BURST_WITH_KEYFRAME,
278 "Serve burst-value data preferably starting on a keyframe",
279 "burst-with-keyframe"},
283 if (!sync_method_type) {
284 sync_method_type = g_enum_register_static ("GstSyncMethod", sync_method);
286 return sync_method_type;
289 #define GST_TYPE_UNIT_TYPE (gst_unit_type_get_type())
291 gst_unit_type_get_type (void)
293 static GType unit_type_type = 0;
294 static const GEnumValue unit_type[] = {
295 {GST_TCP_UNIT_TYPE_UNDEFINED, "Undefined", "undefined"},
296 {GST_TCP_UNIT_TYPE_BUFFERS, "Buffers", "buffers"},
297 {GST_TCP_UNIT_TYPE_BYTES, "Bytes", "bytes"},
298 {GST_TCP_UNIT_TYPE_TIME, "Time", "time"},
302 if (!unit_type_type) {
303 unit_type_type = g_enum_register_static ("GstTCPUnitType", unit_type);
305 return unit_type_type;
308 #define GST_TYPE_CLIENT_STATUS (gst_client_status_get_type())
310 gst_client_status_get_type (void)
312 static GType client_status_type = 0;
313 static const GEnumValue client_status[] = {
314 {GST_CLIENT_STATUS_OK, "ok", "ok"},
315 {GST_CLIENT_STATUS_CLOSED, "Closed", "closed"},
316 {GST_CLIENT_STATUS_REMOVED, "Removed", "removed"},
317 {GST_CLIENT_STATUS_SLOW, "Too slow", "slow"},
318 {GST_CLIENT_STATUS_ERROR, "Error", "error"},
319 {GST_CLIENT_STATUS_DUPLICATE, "Duplicate", "duplicate"},
320 {GST_CLIENT_STATUS_FLUSHING, "Flushing", "flushing"},
324 if (!client_status_type) {
326 g_enum_register_static ("GstClientStatus", client_status);
328 return client_status_type;
331 static void gst_multi_fd_sink_finalize (GObject * object);
333 static void gst_multi_fd_sink_remove_client_link (GstMultiFdSink * sink,
336 static GstFlowReturn gst_multi_fd_sink_render (GstBaseSink * bsink,
338 static GstStateChangeReturn gst_multi_fd_sink_change_state (GstElement *
339 element, GstStateChange transition);
341 static void gst_multi_fd_sink_set_property (GObject * object, guint prop_id,
342 const GValue * value, GParamSpec * pspec);
343 static void gst_multi_fd_sink_get_property (GObject * object, guint prop_id,
344 GValue * value, GParamSpec * pspec);
346 GST_BOILERPLATE (GstMultiFdSink, gst_multi_fd_sink, GstBaseSink,
349 static guint gst_multi_fd_sink_signals[LAST_SIGNAL] = { 0 };
352 gst_multi_fd_sink_base_init (gpointer g_class)
354 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
356 gst_element_class_add_pad_template (element_class,
357 gst_static_pad_template_get (&sinktemplate));
359 gst_element_class_set_details_simple (element_class,
360 "Multi filedescriptor sink", "Sink/Network",
361 "Send data to multiple filedescriptors",
362 "Thomas Vander Stichele <thomas at apestaart dot org>, "
363 "Wim Taymans <wim@fluendo.com>");
367 gst_multi_fd_sink_class_init (GstMultiFdSinkClass * klass)
369 GObjectClass *gobject_class;
370 GstElementClass *gstelement_class;
371 GstBaseSinkClass *gstbasesink_class;
373 gobject_class = (GObjectClass *) klass;
374 gstelement_class = (GstElementClass *) klass;
375 gstbasesink_class = (GstBaseSinkClass *) klass;
377 gobject_class->set_property = gst_multi_fd_sink_set_property;
378 gobject_class->get_property = gst_multi_fd_sink_get_property;
379 gobject_class->finalize = gst_multi_fd_sink_finalize;
382 * GstMultiFdSink::mode
384 * The mode for selecting activity on the fds.
386 * This property is deprecated since 0.10.18, if will now automatically
387 * select and use the most optimal method.
389 g_object_class_install_property (gobject_class, PROP_MODE,
390 g_param_spec_enum ("mode", "Mode",
391 "The mode for selecting activity on the fds (deprecated)",
392 GST_TYPE_FDSET_MODE, DEFAULT_MODE,
393 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
395 g_object_class_install_property (gobject_class, PROP_BUFFERS_MAX,
396 g_param_spec_int ("buffers-max", "Buffers max",
397 "max number of buffers to queue for a client (-1 = no limit)", -1,
398 G_MAXINT, DEFAULT_BUFFERS_MAX,
399 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
400 g_object_class_install_property (gobject_class, PROP_BUFFERS_SOFT_MAX,
401 g_param_spec_int ("buffers-soft-max", "Buffers soft max",
402 "Recover client when going over this limit (-1 = no limit)", -1,
403 G_MAXINT, DEFAULT_BUFFERS_SOFT_MAX,
404 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
406 g_object_class_install_property (gobject_class, PROP_BYTES_MIN,
407 g_param_spec_int ("bytes-min", "Bytes min",
408 "min number of bytes to queue (-1 = as little as possible)", -1,
409 G_MAXINT, DEFAULT_BYTES_MIN,
410 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
411 g_object_class_install_property (gobject_class, PROP_TIME_MIN,
412 g_param_spec_int64 ("time-min", "Time min",
413 "min number of time to queue (-1 = as little as possible)", -1,
414 G_MAXINT64, DEFAULT_TIME_MIN,
415 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
416 g_object_class_install_property (gobject_class, PROP_BUFFERS_MIN,
417 g_param_spec_int ("buffers-min", "Buffers min",
418 "min number of buffers to queue (-1 = as few as possible)", -1,
419 G_MAXINT, DEFAULT_BUFFERS_MIN,
420 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
422 g_object_class_install_property (gobject_class, PROP_UNIT_TYPE,
423 g_param_spec_enum ("unit-type", "Units type",
424 "The unit to measure the max/soft-max/queued properties",
425 GST_TYPE_UNIT_TYPE, DEFAULT_UNIT_TYPE,
426 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
427 g_object_class_install_property (gobject_class, PROP_UNITS_MAX,
428 g_param_spec_int64 ("units-max", "Units max",
429 "max number of units to queue (-1 = no limit)", -1, G_MAXINT64,
430 DEFAULT_UNITS_MAX, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
431 g_object_class_install_property (gobject_class, PROP_UNITS_SOFT_MAX,
432 g_param_spec_int64 ("units-soft-max", "Units soft max",
433 "Recover client when going over this limit (-1 = no limit)", -1,
434 G_MAXINT64, DEFAULT_UNITS_SOFT_MAX,
435 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
437 g_object_class_install_property (gobject_class, PROP_BUFFERS_QUEUED,
438 g_param_spec_uint ("buffers-queued", "Buffers queued",
439 "Number of buffers currently queued", 0, G_MAXUINT, 0,
440 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
442 g_object_class_install_property (gobject_class, PROP_BYTES_QUEUED,
443 g_param_spec_uint ("bytes-queued", "Bytes queued",
444 "Number of bytes currently queued", 0, G_MAXUINT, 0,
445 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
446 g_object_class_install_property (gobject_class, PROP_TIME_QUEUED,
447 g_param_spec_uint64 ("time-queued", "Time queued",
448 "Number of time currently queued", 0, G_MAXUINT64, 0,
449 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
452 g_object_class_install_property (gobject_class, PROP_RECOVER_POLICY,
453 g_param_spec_enum ("recover-policy", "Recover Policy",
454 "How to recover when client reaches the soft max",
455 GST_TYPE_RECOVER_POLICY, DEFAULT_RECOVER_POLICY,
456 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
457 g_object_class_install_property (gobject_class, PROP_TIMEOUT,
458 g_param_spec_uint64 ("timeout", "Timeout",
459 "Maximum inactivity timeout in nanoseconds for a client (0 = no limit)",
460 0, G_MAXUINT64, DEFAULT_TIMEOUT,
461 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
462 g_object_class_install_property (gobject_class, PROP_SYNC_METHOD,
463 g_param_spec_enum ("sync-method", "Sync Method",
464 "How to sync new clients to the stream", GST_TYPE_SYNC_METHOD,
465 DEFAULT_SYNC_METHOD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
466 g_object_class_install_property (gobject_class, PROP_BYTES_TO_SERVE,
467 g_param_spec_uint64 ("bytes-to-serve", "Bytes to serve",
468 "Number of bytes received to serve to clients", 0, G_MAXUINT64, 0,
469 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
470 g_object_class_install_property (gobject_class, PROP_BYTES_SERVED,
471 g_param_spec_uint64 ("bytes-served", "Bytes served",
472 "Total number of bytes send to all clients", 0, G_MAXUINT64, 0,
473 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
475 g_object_class_install_property (gobject_class, PROP_BURST_UNIT,
476 g_param_spec_enum ("burst-unit", "Burst unit",
477 "The format of the burst units (when sync-method is burst[[-with]-keyframe])",
478 GST_TYPE_UNIT_TYPE, DEFAULT_BURST_UNIT,
479 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
480 g_object_class_install_property (gobject_class, PROP_BURST_VALUE,
481 g_param_spec_uint64 ("burst-value", "Burst value",
482 "The amount of burst expressed in burst-unit", 0, G_MAXUINT64,
483 DEFAULT_BURST_VALUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
485 g_object_class_install_property (gobject_class, PROP_QOS_DSCP,
486 g_param_spec_int ("qos-dscp", "QoS diff srv code point",
487 "Quality of Service, differentiated services code point (-1 default)",
488 -1, 63, DEFAULT_QOS_DSCP,
489 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
491 * GstMultiFdSink::handle-read
493 * Handle read requests from clients and discard the data.
497 g_object_class_install_property (gobject_class, PROP_HANDLE_READ,
498 g_param_spec_boolean ("handle-read", "Handle Read",
499 "Handle client reads and discard the data",
500 DEFAULT_HANDLE_READ, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
502 * GstMultiFdSink::resend-streamheader
504 * Resend the streamheaders to existing clients when they change.
508 g_object_class_install_property (gobject_class, PROP_RESEND_STREAMHEADER,
509 g_param_spec_boolean ("resend-streamheader", "Resend streamheader",
510 "Resend the streamheader if it changes in the caps",
511 DEFAULT_RESEND_STREAMHEADER,
512 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
514 g_object_class_install_property (gobject_class, PROP_NUM_FDS,
515 g_param_spec_uint ("num-fds", "Number of fds",
516 "The current number of client file descriptors.",
517 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
520 * GstMultiFdSink::add:
521 * @gstmultifdsink: the multifdsink element to emit this signal on
522 * @fd: the file descriptor to add to multifdsink
524 * Hand the given open file descriptor to multifdsink to write to.
526 gst_multi_fd_sink_signals[SIGNAL_ADD] =
527 g_signal_new ("add", G_TYPE_FROM_CLASS (klass),
528 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
529 add), NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1,
532 * GstMultiFdSink::add-full:
533 * @gstmultifdsink: the multifdsink element to emit this signal on
534 * @fd: the file descriptor to add to multifdsink
535 * @sync: the sync method to use
536 * @unit_type_min: the unit-type of @value_min
537 * @value_min: the minimum amount of data to burst expressed in
538 * @unit_type_min units.
539 * @unit_type_max: the unit-type of @value_max
540 * @value_max: the maximum amount of data to burst expressed in
541 * @unit_type_max units.
543 * Hand the given open file descriptor to multifdsink to write to and
544 * specify the burst parameters for the new connection.
546 gst_multi_fd_sink_signals[SIGNAL_ADD_BURST] =
547 g_signal_new ("add-full", G_TYPE_FROM_CLASS (klass),
548 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
549 add_full), NULL, NULL,
550 gst_tcp_marshal_VOID__INT_ENUM_INT_UINT64_INT_UINT64, G_TYPE_NONE, 6,
551 G_TYPE_INT, GST_TYPE_SYNC_METHOD, GST_TYPE_UNIT_TYPE, G_TYPE_UINT64,
552 GST_TYPE_UNIT_TYPE, G_TYPE_UINT64);
554 * GstMultiFdSink::remove:
555 * @gstmultifdsink: the multifdsink element to emit this signal on
556 * @fd: the file descriptor to remove from multifdsink
558 * Remove the given open file descriptor from multifdsink.
560 gst_multi_fd_sink_signals[SIGNAL_REMOVE] =
561 g_signal_new ("remove", G_TYPE_FROM_CLASS (klass),
562 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
563 remove), NULL, NULL, gst_tcp_marshal_VOID__INT, G_TYPE_NONE, 1,
566 * GstMultiFdSink::remove-flush:
567 * @gstmultifdsink: the multifdsink element to emit this signal on
568 * @fd: the file descriptor to remove from multifdsink
570 * Remove the given open file descriptor from multifdsink after flushing all
571 * the pending data to the fd.
573 gst_multi_fd_sink_signals[SIGNAL_REMOVE_FLUSH] =
574 g_signal_new ("remove-flush", G_TYPE_FROM_CLASS (klass),
575 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
576 remove_flush), NULL, NULL, gst_tcp_marshal_VOID__INT, G_TYPE_NONE, 1,
579 * GstMultiFdSink::clear:
580 * @gstmultifdsink: the multifdsink element to emit this signal on
582 * Remove all file descriptors from multifdsink. Since multifdsink did not
583 * open fd's itself, it does not explicitly close the fd. The application
584 * should do so by connecting to the client-fd-removed callback.
586 gst_multi_fd_sink_signals[SIGNAL_CLEAR] =
587 g_signal_new ("clear", G_TYPE_FROM_CLASS (klass),
588 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
589 clear), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
592 * GstMultiFdSink::get-stats:
593 * @gstmultifdsink: the multifdsink element to emit this signal on
594 * @fd: the file descriptor to get stats of from multifdsink
596 * Get statistics about @fd. This function returns a GValueArray to ease
597 * automatic wrapping for bindings.
599 * Returns: a GValueArray with the statistics. The array contains guint64
600 * values that represent respectively: total number of bytes sent, time
601 * when the client was added, time when the client was
602 * disconnected/removed, time the client is/was active, last activity
603 * time (in epoch seconds), number of buffers dropped.
604 * All times are expressed in nanoseconds (GstClockTime).
605 * The array can be 0-length if the client was not found.
607 gst_multi_fd_sink_signals[SIGNAL_GET_STATS] =
608 g_signal_new ("get-stats", G_TYPE_FROM_CLASS (klass),
609 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
610 get_stats), NULL, NULL, gst_tcp_marshal_BOXED__INT,
611 G_TYPE_VALUE_ARRAY, 1, G_TYPE_INT);
614 * GstMultiFdSink::client-added:
615 * @gstmultifdsink: the multifdsink element that emitted this signal
616 * @fd: the file descriptor that was added to multifdsink
618 * The given file descriptor was added to multifdsink. This signal will
619 * be emitted from the streaming thread so application should be prepared
622 gst_multi_fd_sink_signals[SIGNAL_CLIENT_ADDED] =
623 g_signal_new ("client-added", G_TYPE_FROM_CLASS (klass),
624 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass, client_added),
625 NULL, NULL, gst_tcp_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
627 * GstMultiFdSink::client-removed:
628 * @gstmultifdsink: the multifdsink element that emitted this signal
629 * @fd: the file descriptor that is to be removed from multifdsink
630 * @status: the reason why the client was removed
632 * The given file descriptor is about to be removed from multifdsink. This
633 * signal will be emitted from the streaming thread so applications should
634 * be prepared for that.
636 * @gstmultifdsink still holds a handle to @fd so it is possible to call
637 * the get-stats signal from this callback. For the same reason it is
638 * not safe to close() and reuse @fd in this callback.
640 gst_multi_fd_sink_signals[SIGNAL_CLIENT_REMOVED] =
641 g_signal_new ("client-removed", G_TYPE_FROM_CLASS (klass),
642 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass,
643 client_removed), NULL, NULL, gst_tcp_marshal_VOID__INT_BOXED,
644 G_TYPE_NONE, 2, G_TYPE_INT, GST_TYPE_CLIENT_STATUS);
646 * GstMultiFdSink::client-fd-removed:
647 * @gstmultifdsink: the multifdsink element that emitted this signal
648 * @fd: the file descriptor that was removed from multifdsink
650 * The given file descriptor was removed from multifdsink. This signal will
651 * be emitted from the streaming thread so applications should be prepared
654 * In this callback, @gstmultifdsink has removed all the information
655 * associated with @fd and it is therefore not possible to call get-stats
656 * with @fd. It is however safe to close() and reuse @fd in the callback.
660 gst_multi_fd_sink_signals[SIGNAL_CLIENT_FD_REMOVED] =
661 g_signal_new ("client-fd-removed", G_TYPE_FROM_CLASS (klass),
662 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass,
663 client_fd_removed), NULL, NULL, gst_tcp_marshal_VOID__INT,
664 G_TYPE_NONE, 1, G_TYPE_INT);
666 gstelement_class->change_state =
667 GST_DEBUG_FUNCPTR (gst_multi_fd_sink_change_state);
669 gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_render);
671 klass->add = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_add);
672 klass->add_full = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_add_full);
673 klass->remove = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_remove);
674 klass->remove_flush = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_remove_flush);
675 klass->clear = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_clear);
676 klass->get_stats = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_get_stats);
678 GST_DEBUG_CATEGORY_INIT (multifdsink_debug, "multifdsink", 0, "FD sink");
682 gst_multi_fd_sink_init (GstMultiFdSink * this, GstMultiFdSinkClass * klass)
684 GST_OBJECT_FLAG_UNSET (this, GST_MULTI_FD_SINK_OPEN);
686 this->mode = DEFAULT_MODE;
688 CLIENTS_LOCK_INIT (this);
689 this->clients = NULL;
690 this->fd_hash = g_hash_table_new (g_int_hash, g_int_equal);
692 this->bufqueue = g_array_new (FALSE, TRUE, sizeof (GstBuffer *));
693 this->unit_type = DEFAULT_UNIT_TYPE;
694 this->units_max = DEFAULT_UNITS_MAX;
695 this->units_soft_max = DEFAULT_UNITS_SOFT_MAX;
696 this->time_min = DEFAULT_TIME_MIN;
697 this->bytes_min = DEFAULT_BYTES_MIN;
698 this->buffers_min = DEFAULT_BUFFERS_MIN;
699 this->recover_policy = DEFAULT_RECOVER_POLICY;
701 this->timeout = DEFAULT_TIMEOUT;
702 this->def_sync_method = DEFAULT_SYNC_METHOD;
703 this->def_burst_unit = DEFAULT_BURST_UNIT;
704 this->def_burst_value = DEFAULT_BURST_VALUE;
706 this->qos_dscp = DEFAULT_QOS_DSCP;
707 this->handle_read = DEFAULT_HANDLE_READ;
709 this->resend_streamheader = DEFAULT_RESEND_STREAMHEADER;
711 this->header_flags = 0;
715 gst_multi_fd_sink_finalize (GObject * object)
717 GstMultiFdSink *this;
719 this = GST_MULTI_FD_SINK (object);
721 CLIENTS_LOCK_FREE (this);
722 g_hash_table_destroy (this->fd_hash);
723 g_array_free (this->bufqueue, TRUE);
725 G_OBJECT_CLASS (parent_class)->finalize (object);
729 setup_dscp_client (GstMultiFdSink * sink, GstTCPClient * client)
736 struct sockaddr_in6 sa_in6;
737 struct sockaddr_storage sa_stor;
739 socklen_t slen = sizeof (sa);
743 if (sink->qos_dscp < 0)
746 if ((ret = getsockname (client->fd.fd, &sa.sa, &slen)) < 0) {
747 GST_DEBUG_OBJECT (sink, "could not get sockname: %s", g_strerror (errno));
751 af = sa.sa.sa_family;
753 /* if this is an IPv4-mapped address then do IPv4 QoS */
754 if (af == AF_INET6) {
756 GST_DEBUG_OBJECT (sink, "check IP6 socket");
757 if (IN6_IS_ADDR_V4MAPPED (&(sa.sa_in6.sin6_addr))) {
758 GST_DEBUG_OBJECT (sink, "mapped to IPV4");
763 /* extract and shift 6 bits of the DSCP */
764 tos = (sink->qos_dscp & 0x3f) << 2;
768 ret = setsockopt (client->fd.fd, IPPROTO_IP, IP_TOS, &tos, sizeof (tos));
773 setsockopt (client->fd.fd, IPPROTO_IPV6, IPV6_TCLASS, &tos,
779 GST_ERROR_OBJECT (sink, "unsupported AF");
783 GST_DEBUG_OBJECT (sink, "could not set DSCP: %s", g_strerror (errno));
790 setup_dscp (GstMultiFdSink * sink)
792 GList *clients, *next;
795 for (clients = sink->clients; clients; clients = next) {
796 GstTCPClient *client;
798 client = (GstTCPClient *) clients->data;
799 next = g_list_next (clients);
801 setup_dscp_client (sink, client);
803 CLIENTS_UNLOCK (sink);
806 /* "add-full" signal implementation */
808 gst_multi_fd_sink_add_full (GstMultiFdSink * sink, int fd,
809 GstSyncMethod sync_method, GstTCPUnitType min_unit, guint64 min_value,
810 GstTCPUnitType max_unit, guint64 max_value)
812 GstTCPClient *client;
818 GST_DEBUG_OBJECT (sink, "[fd %5d] adding client, sync_method %d, "
819 "min_unit %d, min_value %" G_GUINT64_FORMAT
820 ", max_unit %d, max_value %" G_GUINT64_FORMAT, fd, sync_method,
821 min_unit, min_value, max_unit, max_value);
823 /* do limits check if we can */
824 if (min_unit == max_unit) {
825 if (max_value != -1 && min_value != -1 && max_value < min_value)
829 /* create client datastructure */
830 client = g_new0 (GstTCPClient, 1);
832 client->status = GST_CLIENT_STATUS_OK;
834 client->flushcount = -1;
835 client->bufoffset = 0;
836 client->sending = NULL;
837 client->bytes_sent = 0;
838 client->dropped_buffers = 0;
839 client->avg_queue_size = 0;
840 client->first_buffer_ts = GST_CLOCK_TIME_NONE;
841 client->last_buffer_ts = GST_CLOCK_TIME_NONE;
842 client->new_connection = TRUE;
843 client->burst_min_unit = min_unit;
844 client->burst_min_value = min_value;
845 client->burst_max_unit = max_unit;
846 client->burst_max_value = max_value;
847 client->sync_method = sync_method;
848 client->currently_removing = FALSE;
850 /* update start time */
851 g_get_current_time (&now);
852 client->connect_time = GST_TIMEVAL_TO_TIME (now);
853 client->disconnect_time = 0;
854 /* set last activity time to connect time */
855 client->last_activity_time = client->connect_time;
859 /* check the hash to find a duplicate fd */
860 clink = g_hash_table_lookup (sink->fd_hash, &client->fd.fd);
864 /* we can add the fd now */
865 clink = sink->clients = g_list_prepend (sink->clients, client);
866 g_hash_table_insert (sink->fd_hash, &client->fd.fd, clink);
867 sink->clients_cookie++;
869 /* set the socket to non blocking */
870 res = fcntl (fd, F_SETFL, O_NONBLOCK);
871 /* we always read from a client */
872 gst_poll_add_fd (sink->fdset, &client->fd);
874 /* we don't try to read from write only fds */
875 if (sink->handle_read) {
876 flags = fcntl (fd, F_GETFL, 0);
877 if ((flags & O_ACCMODE) != O_WRONLY) {
878 gst_poll_fd_ctl_read (sink->fdset, &client->fd, TRUE);
881 /* figure out the mode, can't use send() for non sockets */
882 res = fstat (fd, &statbuf);
883 if (S_ISSOCK (statbuf.st_mode)) {
884 client->is_socket = TRUE;
885 setup_dscp_client (sink, client);
888 gst_poll_restart (sink->fdset);
890 CLIENTS_UNLOCK (sink);
892 g_signal_emit (G_OBJECT (sink),
893 gst_multi_fd_sink_signals[SIGNAL_CLIENT_ADDED], 0, fd);
900 GST_WARNING_OBJECT (sink,
901 "[fd %5d] wrong values min =%" G_GUINT64_FORMAT ", max=%"
902 G_GUINT64_FORMAT ", unit %d specified when adding client", fd,
903 min_value, max_value, min_unit);
908 client->status = GST_CLIENT_STATUS_DUPLICATE;
909 CLIENTS_UNLOCK (sink);
910 GST_WARNING_OBJECT (sink, "[fd %5d] duplicate client found, refusing", fd);
911 g_signal_emit (G_OBJECT (sink),
912 gst_multi_fd_sink_signals[SIGNAL_CLIENT_REMOVED], 0, fd,
919 /* "add" signal implemntation */
921 gst_multi_fd_sink_add (GstMultiFdSink * sink, int fd)
923 gst_multi_fd_sink_add_full (sink, fd, sink->def_sync_method,
924 sink->def_burst_unit, sink->def_burst_value, sink->def_burst_unit, -1);
927 /* "remove" signal implementation */
929 gst_multi_fd_sink_remove (GstMultiFdSink * sink, int fd)
933 GST_DEBUG_OBJECT (sink, "[fd %5d] removing client", fd);
936 clink = g_hash_table_lookup (sink->fd_hash, &fd);
938 GstTCPClient *client = (GstTCPClient *) clink->data;
940 if (client->status != GST_CLIENT_STATUS_OK) {
941 GST_INFO_OBJECT (sink,
942 "[fd %5d] Client already disconnecting with status %d",
947 client->status = GST_CLIENT_STATUS_REMOVED;
948 gst_multi_fd_sink_remove_client_link (sink, clink);
949 gst_poll_restart (sink->fdset);
951 GST_WARNING_OBJECT (sink, "[fd %5d] no client with this fd found!", fd);
955 CLIENTS_UNLOCK (sink);
958 /* "remove-flush" signal implementation */
960 gst_multi_fd_sink_remove_flush (GstMultiFdSink * sink, int fd)
964 GST_DEBUG_OBJECT (sink, "[fd %5d] flushing client", fd);
967 clink = g_hash_table_lookup (sink->fd_hash, &fd);
969 GstTCPClient *client = (GstTCPClient *) clink->data;
971 if (client->status != GST_CLIENT_STATUS_OK) {
972 GST_INFO_OBJECT (sink,
973 "[fd %5d] Client already disconnecting with status %d",
978 /* take the position of the client as the number of buffers left to flush.
979 * If the client was at position -1, we flush 0 buffers, 0 == flush 1
981 client->flushcount = client->bufpos + 1;
982 /* mark client as flushing. We can not remove the client right away because
983 * it might have some buffers to flush in the ->sending queue. */
984 client->status = GST_CLIENT_STATUS_FLUSHING;
986 GST_WARNING_OBJECT (sink, "[fd %5d] no client with this fd found!", fd);
989 CLIENTS_UNLOCK (sink);
992 /* can be called both through the signal (i.e. from any thread) or when
993 * stopping, after the writing thread has shut down */
995 gst_multi_fd_sink_clear (GstMultiFdSink * sink)
997 GList *clients, *next;
1000 GST_DEBUG_OBJECT (sink, "clearing all clients");
1002 CLIENTS_LOCK (sink);
1004 cookie = sink->clients_cookie;
1005 for (clients = sink->clients; clients; clients = next) {
1006 GstTCPClient *client;
1008 if (cookie != sink->clients_cookie) {
1009 GST_DEBUG_OBJECT (sink, "cookie changed while removing all clients");
1013 client = (GstTCPClient *) clients->data;
1014 next = g_list_next (clients);
1016 client->status = GST_CLIENT_STATUS_REMOVED;
1017 gst_multi_fd_sink_remove_client_link (sink, clients);
1019 gst_poll_restart (sink->fdset);
1020 CLIENTS_UNLOCK (sink);
1023 /* "get-stats" signal implementation
1024 * the array returned contains:
1026 * guint64 : bytes_sent
1027 * guint64 : connect time (in nanoseconds, since Epoch)
1028 * guint64 : disconnect time (in nanoseconds, since Epoch)
1029 * guint64 : time the client is/was connected (in nanoseconds)
1030 * guint64 : last activity time (in nanoseconds, since Epoch)
1031 * guint64 : buffers dropped due to recovery
1032 * guint64 : timestamp of the first buffer sent (in nanoseconds)
1033 * guint64 : timestamp of the last buffer sent (in nanoseconds)
1036 gst_multi_fd_sink_get_stats (GstMultiFdSink * sink, int fd)
1038 GstTCPClient *client;
1039 GValueArray *result = NULL;
1042 CLIENTS_LOCK (sink);
1043 clink = g_hash_table_lookup (sink->fd_hash, &fd);
1047 client = (GstTCPClient *) clink->data;
1048 if (client != NULL) {
1049 GValue value = { 0 };
1052 result = g_value_array_new (7);
1054 g_value_init (&value, G_TYPE_UINT64);
1055 g_value_set_uint64 (&value, client->bytes_sent);
1056 result = g_value_array_append (result, &value);
1057 g_value_unset (&value);
1058 g_value_init (&value, G_TYPE_UINT64);
1059 g_value_set_uint64 (&value, client->connect_time);
1060 result = g_value_array_append (result, &value);
1061 g_value_unset (&value);
1062 if (client->disconnect_time == 0) {
1065 g_get_current_time (&nowtv);
1067 interval = GST_TIMEVAL_TO_TIME (nowtv) - client->connect_time;
1069 interval = client->disconnect_time - client->connect_time;
1071 g_value_init (&value, G_TYPE_UINT64);
1072 g_value_set_uint64 (&value, client->disconnect_time);
1073 result = g_value_array_append (result, &value);
1074 g_value_unset (&value);
1075 g_value_init (&value, G_TYPE_UINT64);
1076 g_value_set_uint64 (&value, interval);
1077 result = g_value_array_append (result, &value);
1078 g_value_unset (&value);
1079 g_value_init (&value, G_TYPE_UINT64);
1080 g_value_set_uint64 (&value, client->last_activity_time);
1081 result = g_value_array_append (result, &value);
1082 g_value_unset (&value);
1083 g_value_init (&value, G_TYPE_UINT64);
1084 g_value_set_uint64 (&value, client->dropped_buffers);
1085 result = g_value_array_append (result, &value);
1086 g_value_unset (&value);
1087 g_value_init (&value, G_TYPE_UINT64);
1088 g_value_set_uint64 (&value, client->first_buffer_ts);
1089 result = g_value_array_append (result, &value);
1090 g_value_unset (&value);
1091 g_value_init (&value, G_TYPE_UINT64);
1092 g_value_set_uint64 (&value, client->last_buffer_ts);
1093 result = g_value_array_append (result, &value);
1097 CLIENTS_UNLOCK (sink);
1099 /* python doesn't like a NULL pointer yet */
1100 if (result == NULL) {
1101 GST_WARNING_OBJECT (sink, "[fd %5d] no client with this found!", fd);
1102 result = g_value_array_new (0);
1108 /* should be called with the clientslock helt.
1109 * Note that we don't close the fd as we didn't open it in the first
1110 * place. An application should connect to the client-fd-removed signal and
1111 * close the fd itself.
1114 gst_multi_fd_sink_remove_client_link (GstMultiFdSink * sink, GList * link)
1118 GstTCPClient *client = (GstTCPClient *) link->data;
1119 GstMultiFdSinkClass *fclass;
1121 fclass = GST_MULTI_FD_SINK_GET_CLASS (sink);
1125 if (client->currently_removing) {
1126 GST_WARNING_OBJECT (sink, "[fd %5d] client is already being removed", fd);
1129 client->currently_removing = TRUE;
1132 /* FIXME: if we keep track of ip we can log it here and signal */
1133 switch (client->status) {
1134 case GST_CLIENT_STATUS_OK:
1135 GST_WARNING_OBJECT (sink, "[fd %5d] removing client %p for no reason",
1138 case GST_CLIENT_STATUS_CLOSED:
1139 GST_DEBUG_OBJECT (sink, "[fd %5d] removing client %p because of close",
1142 case GST_CLIENT_STATUS_REMOVED:
1143 GST_DEBUG_OBJECT (sink,
1144 "[fd %5d] removing client %p because the app removed it", fd, client);
1146 case GST_CLIENT_STATUS_SLOW:
1147 GST_INFO_OBJECT (sink,
1148 "[fd %5d] removing client %p because it was too slow", fd, client);
1150 case GST_CLIENT_STATUS_ERROR:
1151 GST_WARNING_OBJECT (sink,
1152 "[fd %5d] removing client %p because of error", fd, client);
1154 case GST_CLIENT_STATUS_FLUSHING:
1156 GST_WARNING_OBJECT (sink,
1157 "[fd %5d] removing client %p with invalid reason %d", fd, client,
1162 gst_poll_remove_fd (sink->fdset, &client->fd);
1164 g_get_current_time (&now);
1165 client->disconnect_time = GST_TIMEVAL_TO_TIME (now);
1167 /* free client buffers */
1168 g_slist_foreach (client->sending, (GFunc) gst_mini_object_unref, NULL);
1169 g_slist_free (client->sending);
1170 client->sending = NULL;
1173 gst_caps_unref (client->caps);
1174 client->caps = NULL;
1176 /* unlock the mutex before signaling because the signal handler
1177 * might query some properties */
1178 CLIENTS_UNLOCK (sink);
1180 g_signal_emit (G_OBJECT (sink),
1181 gst_multi_fd_sink_signals[SIGNAL_CLIENT_REMOVED], 0, fd, client->status);
1183 /* lock again before we remove the client completely */
1184 CLIENTS_LOCK (sink);
1186 /* fd cannot be reused in the above signal callback so we can safely
1187 * remove it from the hashtable here */
1188 if (!g_hash_table_remove (sink->fd_hash, &client->fd.fd)) {
1189 GST_WARNING_OBJECT (sink,
1190 "[fd %5d] error removing client %p from hash", client->fd.fd, client);
1192 /* after releasing the lock above, the link could be invalid, more
1193 * precisely, the next and prev pointers could point to invalid list
1194 * links. One optimisation could be to add a cookie to the linked list
1195 * and take a shortcut when it did not change between unlocking and locking
1196 * our mutex. For now we just walk the list again. */
1197 sink->clients = g_list_remove (sink->clients, client);
1198 sink->clients_cookie++;
1200 if (fclass->removed)
1201 fclass->removed (sink, client->fd.fd);
1204 CLIENTS_UNLOCK (sink);
1206 /* and the fd is really gone now */
1207 g_signal_emit (G_OBJECT (sink),
1208 gst_multi_fd_sink_signals[SIGNAL_CLIENT_FD_REMOVED], 0, fd);
1210 CLIENTS_LOCK (sink);
1213 /* handle a read on a client fd,
1214 * which either indicates a close or should be ignored
1215 * returns FALSE if some error occured or the client closed. */
1217 gst_multi_fd_sink_handle_client_read (GstMultiFdSink * sink,
1218 GstTCPClient * client)
1225 if (ioctl (fd, FIONREAD, &avail) < 0)
1228 GST_DEBUG_OBJECT (sink, "[fd %5d] select reports client read of %d bytes",
1234 /* client sent close, so remove it */
1235 GST_DEBUG_OBJECT (sink, "[fd %5d] client asked for close, removing", fd);
1236 client->status = GST_CLIENT_STATUS_CLOSED;
1238 } else if (avail < 0) {
1239 GST_WARNING_OBJECT (sink, "[fd %5d] avail < 0, removing", fd);
1240 client->status = GST_CLIENT_STATUS_ERROR;
1246 /* just Read 'n' Drop, could also just drop the client as it's not supposed
1247 * to write to us except for closing the socket, I guess it's because we
1248 * like to listen to our customers. */
1250 /* this is the maximum we can read */
1251 gint to_read = MIN (avail, 512);
1253 GST_DEBUG_OBJECT (sink, "[fd %5d] client wants us to read %d bytes",
1256 nread = read (fd, dummy, to_read);
1258 GST_WARNING_OBJECT (sink, "[fd %5d] could not read %d bytes: %s (%d)",
1259 fd, to_read, g_strerror (errno), errno);
1260 client->status = GST_CLIENT_STATUS_ERROR;
1263 } else if (nread == 0) {
1264 GST_WARNING_OBJECT (sink, "[fd %5d] 0 bytes in read, removing", fd);
1265 client->status = GST_CLIENT_STATUS_ERROR;
1278 GST_WARNING_OBJECT (sink, "[fd %5d] ioctl failed: %s (%d)",
1279 fd, g_strerror (errno), errno);
1280 client->status = GST_CLIENT_STATUS_ERROR;
1286 is_sync_frame (GstMultiFdSink * sink, GstBuffer * buffer)
1288 if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT)) {
1290 } else if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_IN_CAPS)) {
1297 /* queue the given buffer for the given client, possibly adding the GDP
1298 * header if GDP is being used */
1300 gst_multi_fd_sink_client_queue_buffer (GstMultiFdSink * sink,
1301 GstTCPClient * client, GstBuffer * buffer)
1305 /* TRUE: send them if the new caps have them */
1306 gboolean send_streamheader = FALSE;
1309 /* before we queue the buffer, we check if we need to queue streamheader
1310 * buffers (because it's a new client, or because they changed) */
1311 caps = gst_buffer_get_caps (buffer); /* cleaned up after streamheader */
1312 if (!client->caps) {
1313 GST_DEBUG_OBJECT (sink,
1314 "[fd %5d] no previous caps for this client, send streamheader",
1316 send_streamheader = TRUE;
1317 client->caps = gst_caps_ref (caps);
1319 /* there were previous caps recorded, so compare */
1320 if (!gst_caps_is_equal (caps, client->caps)) {
1321 const GValue *sh1, *sh2;
1323 /* caps are not equal, but could still have the same streamheader */
1324 s = gst_caps_get_structure (caps, 0);
1325 if (!gst_structure_has_field (s, "streamheader")) {
1326 /* no new streamheader, so nothing new to send */
1327 GST_DEBUG_OBJECT (sink,
1328 "[fd %5d] new caps do not have streamheader, not sending",
1331 /* there is a new streamheader */
1332 s = gst_caps_get_structure (client->caps, 0);
1333 if (!gst_structure_has_field (s, "streamheader")) {
1334 /* no previous streamheader, so send the new one */
1335 GST_DEBUG_OBJECT (sink,
1336 "[fd %5d] previous caps did not have streamheader, sending",
1338 send_streamheader = TRUE;
1340 /* both old and new caps have streamheader set */
1341 if (!sink->resend_streamheader) {
1342 GST_DEBUG_OBJECT (sink,
1343 "[fd %5d] asked to not resend the streamheader, not sending",
1345 send_streamheader = FALSE;
1347 sh1 = gst_structure_get_value (s, "streamheader");
1348 s = gst_caps_get_structure (caps, 0);
1349 sh2 = gst_structure_get_value (s, "streamheader");
1350 if (gst_value_compare (sh1, sh2) != GST_VALUE_EQUAL) {
1351 GST_DEBUG_OBJECT (sink,
1352 "[fd %5d] new streamheader different from old, sending",
1354 send_streamheader = TRUE;
1360 /* Replace the old caps */
1361 gst_caps_unref (client->caps);
1362 client->caps = gst_caps_ref (caps);
1365 if (G_UNLIKELY (send_streamheader)) {
1370 GST_LOG_OBJECT (sink,
1371 "[fd %5d] sending streamheader from caps %" GST_PTR_FORMAT,
1372 client->fd.fd, caps);
1373 s = gst_caps_get_structure (caps, 0);
1374 if (!gst_structure_has_field (s, "streamheader")) {
1375 GST_DEBUG_OBJECT (sink,
1376 "[fd %5d] no new streamheader, so nothing to send", client->fd.fd);
1378 GST_LOG_OBJECT (sink,
1379 "[fd %5d] sending streamheader from caps %" GST_PTR_FORMAT,
1380 client->fd.fd, caps);
1381 sh = gst_structure_get_value (s, "streamheader");
1382 g_assert (G_VALUE_TYPE (sh) == GST_TYPE_ARRAY);
1383 buffers = g_value_peek_pointer (sh);
1384 GST_DEBUG_OBJECT (sink, "%d streamheader buffers", buffers->len);
1385 for (i = 0; i < buffers->len; ++i) {
1389 bufval = &g_array_index (buffers, GValue, i);
1390 g_assert (G_VALUE_TYPE (bufval) == GST_TYPE_BUFFER);
1391 buffer = g_value_peek_pointer (bufval);
1392 GST_DEBUG_OBJECT (sink,
1393 "[fd %5d] queueing streamheader buffer of length %d",
1394 client->fd.fd, GST_BUFFER_SIZE (buffer));
1395 gst_buffer_ref (buffer);
1397 client->sending = g_slist_append (client->sending, buffer);
1402 gst_caps_unref (caps);
1405 GST_LOG_OBJECT (sink, "[fd %5d] queueing buffer of length %d",
1406 client->fd.fd, GST_BUFFER_SIZE (buffer));
1408 gst_buffer_ref (buffer);
1409 client->sending = g_slist_append (client->sending, buffer);
1414 /* find the keyframe in the list of buffers starting the
1415 * search from @idx. @direction as -1 will search backwards,
1416 * 1 will search forwards.
1417 * Returns: the index or -1 if there is no keyframe after idx.
1420 find_syncframe (GstMultiFdSink * sink, gint idx, gint direction)
1422 gint i, len, result;
1424 /* take length of queued buffers */
1425 len = sink->bufqueue->len;
1427 /* assume we don't find a keyframe */
1430 /* then loop over all buffers to find the first keyframe */
1431 for (i = idx; i >= 0 && i < len; i += direction) {
1434 buf = g_array_index (sink->bufqueue, GstBuffer *, i);
1435 if (is_sync_frame (sink, buf)) {
1436 GST_LOG_OBJECT (sink, "found keyframe at %d from %d, direction %d",
1445 #define find_next_syncframe(s,i) find_syncframe(s,i,1)
1446 #define find_prev_syncframe(s,i) find_syncframe(s,i,-1)
1448 /* Get the number of buffers from the buffer queue needed to satisfy
1449 * the maximum max in the configured units.
1450 * If units are not BUFFERS, and there are insufficient buffers in the
1451 * queue to satify the limit, return len(queue) + 1 */
1453 get_buffers_max (GstMultiFdSink * sink, gint64 max)
1455 switch (sink->unit_type) {
1456 case GST_TCP_UNIT_TYPE_BUFFERS:
1458 case GST_TCP_UNIT_TYPE_TIME:
1464 GstClockTime first = GST_CLOCK_TIME_NONE;
1466 len = sink->bufqueue->len;
1468 for (i = 0; i < len; i++) {
1469 buf = g_array_index (sink->bufqueue, GstBuffer *, i);
1470 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
1472 first = GST_BUFFER_TIMESTAMP (buf);
1474 diff = first - GST_BUFFER_TIMESTAMP (buf);
1482 case GST_TCP_UNIT_TYPE_BYTES:
1489 len = sink->bufqueue->len;
1491 for (i = 0; i < len; i++) {
1492 buf = g_array_index (sink->bufqueue, GstBuffer *, i);
1493 acc += GST_BUFFER_SIZE (buf);
1505 /* find the positions in the buffer queue where *_min and *_max
1508 /* count the amount of data in the buffers and return the index
1509 * that satifies the given limits.
1511 * Returns: index @idx in the buffer queue so that the given limits are
1512 * satisfied. TRUE if all the limits could be satisfied, FALSE if not
1513 * enough data was in the queue.
1515 * FIXME, this code might now work if any of the units is in buffers...
1518 find_limits (GstMultiFdSink * sink,
1519 gint * min_idx, gint bytes_min, gint buffers_min, gint64 time_min,
1520 gint * max_idx, gint bytes_max, gint buffers_max, gint64 time_max)
1522 GstClockTime first, time;
1524 gboolean result, max_hit;
1526 /* take length of queue */
1527 len = sink->bufqueue->len;
1529 /* this must hold */
1532 GST_LOG_OBJECT (sink,
1533 "bytes_min %d, buffers_min %d, time_min %" GST_TIME_FORMAT
1534 ", bytes_max %d, buffers_max %d, time_max %" GST_TIME_FORMAT, bytes_min,
1535 buffers_min, GST_TIME_ARGS (time_min), bytes_max, buffers_max,
1536 GST_TIME_ARGS (time_max));
1538 /* do the trivial buffer limit test */
1539 if (buffers_min != -1 && len < buffers_min) {
1546 /* else count bytes and time */
1555 /* loop through the buffers, when a limit is ok, mark it
1556 * as -1, we have at least one buffer in the queue. */
1560 /* if we checked all min limits, update result */
1561 if (bytes_min == -1 && time_min == -1 && *min_idx == -1) {
1562 /* don't go below 0 */
1563 *min_idx = MAX (i - 1, 0);
1565 /* if we reached one max limit break out */
1567 /* i > 0 when we get here, we subtract one to get the position
1568 * of the previous buffer. */
1570 /* we have valid complete result if we found a min_idx too */
1571 result = *min_idx != -1;
1574 buf = g_array_index (sink->bufqueue, GstBuffer *, i);
1576 bytes += GST_BUFFER_SIZE (buf);
1578 /* take timestamp and save for the base first timestamp */
1579 if ((time = GST_BUFFER_TIMESTAMP (buf)) != -1) {
1580 GST_LOG_OBJECT (sink, "Ts %" GST_TIME_FORMAT " on buffer",
1581 GST_TIME_ARGS (time));
1585 /* increase max usage if we did not fill enough. Note that
1586 * buffers are sorted from new to old, so the first timestamp is
1587 * bigger than the next one. */
1588 if (time_min != -1 && first - time >= time_min)
1590 if (time_max != -1 && first - time >= time_max)
1593 GST_LOG_OBJECT (sink, "No timestamp on buffer");
1595 /* time is OK or unknown, check and increase if not enough bytes */
1596 if (bytes_min != -1) {
1597 if (bytes >= bytes_min)
1600 if (bytes_max != -1) {
1601 if (bytes >= bytes_max) {
1609 /* if we did not hit the max or min limit, set to buffer size */
1612 /* make sure min does not exceed max */
1614 *min_idx = *max_idx;
1619 /* parse the unit/value pair and assign it to the result value of the
1620 * right type, leave the other values untouched
1622 * Returns: FALSE if the unit is unknown or undefined. TRUE otherwise.
1625 assign_value (GstTCPUnitType unit, guint64 value, gint * bytes, gint * buffers,
1626 GstClockTime * time)
1628 gboolean res = TRUE;
1630 /* set only the limit of the given format to the given value */
1632 case GST_TCP_UNIT_TYPE_BUFFERS:
1633 *buffers = (gint) value;
1635 case GST_TCP_UNIT_TYPE_TIME:
1638 case GST_TCP_UNIT_TYPE_BYTES:
1639 *bytes = (gint) value;
1641 case GST_TCP_UNIT_TYPE_UNDEFINED:
1649 /* count the index in the buffer queue to satisfy the given unit
1650 * and value pair starting from buffer at index 0.
1652 * Returns: TRUE if there was enough data in the queue to satisfy the
1653 * burst values. @idx contains the index in the buffer that contains enough
1654 * data to satisfy the limits or the last buffer in the queue when the
1655 * function returns FALSE.
1658 count_burst_unit (GstMultiFdSink * sink, gint * min_idx,
1659 GstTCPUnitType min_unit, guint64 min_value, gint * max_idx,
1660 GstTCPUnitType max_unit, guint64 max_value)
1662 gint bytes_min = -1, buffers_min = -1;
1663 gint bytes_max = -1, buffers_max = -1;
1664 GstClockTime time_min = GST_CLOCK_TIME_NONE, time_max = GST_CLOCK_TIME_NONE;
1666 assign_value (min_unit, min_value, &bytes_min, &buffers_min, &time_min);
1667 assign_value (max_unit, max_value, &bytes_max, &buffers_max, &time_max);
1669 return find_limits (sink, min_idx, bytes_min, buffers_min, time_min,
1670 max_idx, bytes_max, buffers_max, time_max);
1673 /* decide where in the current buffer queue this new client should start
1674 * receiving buffers from.
1675 * This function is called whenever a client is connected and has not yet
1676 * received a buffer.
1677 * If this returns -1, it means that we haven't found a good point to
1678 * start streaming from yet, and this function should be called again later
1679 * when more buffers have arrived.
1682 gst_multi_fd_sink_new_client (GstMultiFdSink * sink, GstTCPClient * client)
1686 GST_DEBUG_OBJECT (sink,
1687 "[fd %5d] new client, deciding where to start in queue", client->fd.fd);
1688 GST_DEBUG_OBJECT (sink, "queue is currently %d buffers long",
1689 sink->bufqueue->len);
1690 switch (client->sync_method) {
1691 case GST_SYNC_METHOD_LATEST:
1692 /* no syncing, we are happy with whatever the client is going to get */
1693 result = client->bufpos;
1694 GST_DEBUG_OBJECT (sink,
1695 "[fd %5d] SYNC_METHOD_LATEST, position %d", client->fd.fd, result);
1697 case GST_SYNC_METHOD_NEXT_KEYFRAME:
1699 /* if one of the new buffers (between client->bufpos and 0) in the queue
1700 * is a sync point, we can proceed, otherwise we need to keep waiting */
1701 GST_LOG_OBJECT (sink,
1702 "[fd %5d] new client, bufpos %d, waiting for keyframe", client->fd.fd,
1705 result = find_prev_syncframe (sink, client->bufpos);
1707 GST_DEBUG_OBJECT (sink,
1708 "[fd %5d] SYNC_METHOD_NEXT_KEYFRAME: result %d",
1709 client->fd.fd, result);
1713 /* client is not on a syncbuffer, need to skip these buffers and
1715 GST_LOG_OBJECT (sink,
1716 "[fd %5d] new client, skipping buffer(s), no syncpoint found",
1718 client->bufpos = -1;
1721 case GST_SYNC_METHOD_LATEST_KEYFRAME:
1723 GST_DEBUG_OBJECT (sink,
1724 "[fd %5d] SYNC_METHOD_LATEST_KEYFRAME", client->fd.fd);
1726 /* for new clients we initially scan the complete buffer queue for
1727 * a sync point when a buffer is added. If we don't find a keyframe,
1728 * we need to wait for the next keyframe and so we change the client's
1729 * sync method to GST_SYNC_METHOD_NEXT_KEYFRAME.
1731 result = find_next_syncframe (sink, 0);
1733 GST_DEBUG_OBJECT (sink,
1734 "[fd %5d] SYNC_METHOD_LATEST_KEYFRAME: result %d", client->fd.fd,
1739 GST_DEBUG_OBJECT (sink,
1740 "[fd %5d] SYNC_METHOD_LATEST_KEYFRAME: no keyframe found, "
1741 "switching to SYNC_METHOD_NEXT_KEYFRAME", client->fd.fd);
1742 /* throw client to the waiting state */
1743 client->bufpos = -1;
1744 /* and make client sync to next keyframe */
1745 client->sync_method = GST_SYNC_METHOD_NEXT_KEYFRAME;
1748 case GST_SYNC_METHOD_BURST:
1753 /* move to the position where we satisfy the client's burst
1754 * parameters. If we could not satisfy the parameters because there
1755 * is not enough data, we just send what we have (which is in result).
1756 * We use the max value to limit the search
1758 ok = count_burst_unit (sink, &result, client->burst_min_unit,
1759 client->burst_min_value, &max, client->burst_max_unit,
1760 client->burst_max_value);
1761 GST_DEBUG_OBJECT (sink,
1762 "[fd %5d] SYNC_METHOD_BURST: burst_unit returned %d, result %d",
1763 client->fd.fd, ok, result);
1765 GST_LOG_OBJECT (sink, "min %d, max %d", result, max);
1767 /* we hit the max and it is below the min, use that then */
1768 if (max != -1 && max <= result) {
1769 result = MAX (max - 1, 0);
1770 GST_DEBUG_OBJECT (sink,
1771 "[fd %5d] SYNC_METHOD_BURST: result above max, taken down to %d",
1772 client->fd.fd, result);
1776 case GST_SYNC_METHOD_BURST_KEYFRAME:
1779 gint min_idx, max_idx;
1780 gint next_syncframe, prev_syncframe;
1784 * _always_ start sending a keyframe to the client. We first search
1785 * a keyframe between min/max limits. If there is none, we send it the
1786 * last keyframe before min. If there is none, the behaviour is like
1789 /* gather burst limits */
1790 ok = count_burst_unit (sink, &min_idx, client->burst_min_unit,
1791 client->burst_min_value, &max_idx, client->burst_max_unit,
1792 client->burst_max_value);
1794 GST_LOG_OBJECT (sink, "min %d, max %d", min_idx, max_idx);
1796 /* first find a keyframe after min_idx */
1797 next_syncframe = find_next_syncframe (sink, min_idx);
1798 if (next_syncframe != -1 && next_syncframe < max_idx) {
1799 /* we have a valid keyframe and it's below the max */
1800 GST_LOG_OBJECT (sink, "found keyframe in min/max limits");
1801 result = next_syncframe;
1805 /* no valid keyframe, try to find one below min */
1806 prev_syncframe = find_prev_syncframe (sink, min_idx);
1807 if (prev_syncframe != -1) {
1808 GST_WARNING_OBJECT (sink,
1809 "using keyframe below min in BURST_KEYFRAME sync mode");
1810 result = prev_syncframe;
1814 /* no prev keyframe or not enough data */
1815 GST_WARNING_OBJECT (sink,
1816 "no prev keyframe found in BURST_KEYFRAME sync mode, waiting for next");
1818 /* throw client to the waiting state */
1819 client->bufpos = -1;
1820 /* and make client sync to next keyframe */
1821 client->sync_method = GST_SYNC_METHOD_NEXT_KEYFRAME;
1825 case GST_SYNC_METHOD_BURST_WITH_KEYFRAME:
1828 gint min_idx, max_idx;
1829 gint next_syncframe;
1831 /* BURST_WITH_KEYFRAME:
1833 * try to start sending a keyframe to the client. We first search
1834 * a keyframe between min/max limits. If there is none, we send it the
1835 * amount of data up 'till min.
1837 /* gather enough data to burst */
1838 ok = count_burst_unit (sink, &min_idx, client->burst_min_unit,
1839 client->burst_min_value, &max_idx, client->burst_max_unit,
1840 client->burst_max_value);
1842 GST_LOG_OBJECT (sink, "min %d, max %d", min_idx, max_idx);
1844 /* first find a keyframe after min_idx */
1845 next_syncframe = find_next_syncframe (sink, min_idx);
1846 if (next_syncframe != -1 && next_syncframe < max_idx) {
1847 /* we have a valid keyframe and it's below the max */
1848 GST_LOG_OBJECT (sink, "found keyframe in min/max limits");
1849 result = next_syncframe;
1853 /* no keyframe, send data from min_idx */
1854 GST_WARNING_OBJECT (sink, "using min in BURST_WITH_KEYFRAME sync mode");
1856 /* make sure we don't go over the max limit */
1857 if (max_idx != -1 && max_idx <= min_idx) {
1858 result = MAX (max_idx - 1, 0);
1866 g_warning ("unknown sync method %d", client->sync_method);
1867 result = client->bufpos;
1873 /* Handle a write on a client,
1874 * which indicates a read request from a client.
1876 * For each client we maintain a queue of GstBuffers that contain the raw bytes
1877 * we need to send to the client. In the case of the GDP protocol, we create
1878 * buffers out of the header bytes so that we can focus only on sending
1881 * We first check to see if we need to send caps (in GDP) and streamheaders.
1882 * If so, we queue them.
1884 * Then we run into the main loop that tries to send as many buffers as
1885 * possible. It will first exhaust the client->sending queue and if the queue
1886 * is empty, it will pick a buffer from the global queue.
1888 * Sending the buffers from the client->sending queue is basically writing
1889 * the bytes to the socket and maintaining a count of the bytes that were
1890 * sent. When the buffer is completely sent, it is removed from the
1891 * client->sending queue and we try to pick a new buffer for sending.
1893 * When the sending returns a partial buffer we stop sending more data as
1894 * the next send operation could block.
1896 * This functions returns FALSE if some error occured.
1899 gst_multi_fd_sink_handle_client_write (GstMultiFdSink * sink,
1900 GstTCPClient * client)
1902 int fd = client->fd.fd;
1908 g_get_current_time (&nowtv);
1909 now = GST_TIMEVAL_TO_TIME (nowtv);
1911 flushing = client->status == GST_CLIENT_STATUS_FLUSHING;
1917 if (!client->sending) {
1918 /* client is not working on a buffer */
1919 if (client->bufpos == -1) {
1920 /* client is too fast, remove from write queue until new buffer is
1922 gst_poll_fd_ctl_write (sink->fdset, &client->fd, FALSE);
1923 /* if we flushed out all of the client buffers, we can stop */
1924 if (client->flushcount == 0)
1929 /* client can pick a buffer from the global queue */
1931 GstClockTime timestamp;
1933 /* for new connections, we need to find a good spot in the
1934 * bufqueue to start streaming from */
1935 if (client->new_connection && !flushing) {
1936 gint position = gst_multi_fd_sink_new_client (sink, client);
1938 if (position >= 0) {
1939 /* we got a valid spot in the queue */
1940 client->new_connection = FALSE;
1941 client->bufpos = position;
1943 /* cannot send data to this client yet */
1944 gst_poll_fd_ctl_write (sink->fdset, &client->fd, FALSE);
1949 /* we flushed all remaining buffers, no need to get a new one */
1950 if (client->flushcount == 0)
1954 buf = g_array_index (sink->bufqueue, GstBuffer *, client->bufpos);
1958 timestamp = GST_BUFFER_TIMESTAMP (buf);
1959 if (client->first_buffer_ts == GST_CLOCK_TIME_NONE)
1960 client->first_buffer_ts = timestamp;
1961 if (timestamp != -1)
1962 client->last_buffer_ts = timestamp;
1964 /* decrease flushcount */
1965 if (client->flushcount != -1)
1966 client->flushcount--;
1968 GST_LOG_OBJECT (sink, "[fd %5d] client %p at position %d",
1969 fd, client, client->bufpos);
1971 /* queueing a buffer will ref it */
1972 gst_multi_fd_sink_client_queue_buffer (sink, client, buf);
1974 /* need to start from the first byte for this new buffer */
1975 client->bufoffset = 0;
1979 /* see if we need to send something */
1980 if (client->sending) {
1984 /* pick first buffer from list */
1985 head = GST_BUFFER (client->sending->data);
1986 maxsize = GST_BUFFER_SIZE (head) - client->bufoffset;
1988 /* try to write the complete buffer */
1990 #define FLAGS MSG_NOSIGNAL
1994 if (client->is_socket) {
1996 send (fd, GST_BUFFER_DATA (head) + client->bufoffset, maxsize,
1999 wrote = write (fd, GST_BUFFER_DATA (head) + client->bufoffset, maxsize);
2004 if (errno == EAGAIN) {
2005 /* nothing serious, resource was unavailable, try again later */
2007 } else if (errno == ECONNRESET) {
2008 goto connection_reset;
2013 if (wrote < maxsize) {
2014 /* partial write means that the client cannot read more and we should
2015 * stop sending more */
2016 GST_LOG_OBJECT (sink,
2017 "partial write on %d of %" G_GSSIZE_FORMAT " bytes", fd, wrote);
2018 client->bufoffset += wrote;
2021 /* complete buffer was written, we can proceed to the next one */
2022 client->sending = g_slist_remove (client->sending, head);
2023 gst_buffer_unref (head);
2024 /* make sure we start from byte 0 for the next buffer */
2025 client->bufoffset = 0;
2028 client->bytes_sent += wrote;
2029 client->last_activity_time = now;
2030 sink->bytes_served += wrote;
2040 GST_DEBUG_OBJECT (sink, "[fd %5d] flushed, removing", fd);
2041 client->status = GST_CLIENT_STATUS_REMOVED;
2046 GST_DEBUG_OBJECT (sink, "[fd %5d] connection reset by peer, removing", fd);
2047 client->status = GST_CLIENT_STATUS_CLOSED;
2052 GST_WARNING_OBJECT (sink,
2053 "[fd %5d] could not write, removing client: %s (%d)", fd,
2054 g_strerror (errno), errno);
2055 client->status = GST_CLIENT_STATUS_ERROR;
2060 /* calculate the new position for a client after recovery. This function
2061 * does not update the client position but merely returns the required
2065 gst_multi_fd_sink_recover_client (GstMultiFdSink * sink, GstTCPClient * client)
2069 GST_WARNING_OBJECT (sink,
2070 "[fd %5d] client %p is lagging at %d, recover using policy %d",
2071 client->fd.fd, client, client->bufpos, sink->recover_policy);
2073 switch (sink->recover_policy) {
2074 case GST_RECOVER_POLICY_NONE:
2075 /* do nothing, client will catch up or get kicked out when it reaches
2077 newbufpos = client->bufpos;
2079 case GST_RECOVER_POLICY_RESYNC_LATEST:
2080 /* move to beginning of queue */
2083 case GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT:
2084 /* move to beginning of soft max */
2085 newbufpos = get_buffers_max (sink, sink->units_soft_max);
2087 case GST_RECOVER_POLICY_RESYNC_KEYFRAME:
2088 /* find keyframe in buffers, we search backwards to find the
2089 * closest keyframe relative to what this client already received. */
2090 newbufpos = MIN (sink->bufqueue->len - 1,
2091 get_buffers_max (sink, sink->units_soft_max) - 1);
2093 while (newbufpos >= 0) {
2096 buf = g_array_index (sink->bufqueue, GstBuffer *, newbufpos);
2097 if (is_sync_frame (sink, buf)) {
2098 /* found a buffer that is not a delta unit */
2105 /* unknown recovery procedure */
2106 newbufpos = get_buffers_max (sink, sink->units_soft_max);
2112 /* Queue a buffer on the global queue.
2114 * This function adds the buffer to the front of a GArray. It removes the
2115 * tail buffer if the max queue size is exceeded, unreffing the queued buffer.
2116 * Note that unreffing the buffer is not a problem as clients who
2117 * started writing out this buffer will still have a reference to it in the
2118 * client->sending queue.
2120 * After adding the buffer, we update all client positions in the queue. If
2121 * a client moves over the soft max, we start the recovery procedure for this
2122 * slow client. If it goes over the hard max, it is put into the slow list
2125 * Special care is taken of clients that were waiting for a new buffer (they
2126 * had a position of -1) because they can proceed after adding this new buffer.
2127 * This is done by adding the client back into the write fd_set and signalling
2128 * the select thread that the fd_set changed.
2131 gst_multi_fd_sink_queue_buffer (GstMultiFdSink * sink, GstBuffer * buf)
2133 GList *clients, *next;
2135 gboolean need_signal = FALSE;
2136 gint max_buffer_usage;
2140 gint max_buffers, soft_max_buffers;
2143 g_get_current_time (&nowtv);
2144 now = GST_TIMEVAL_TO_TIME (nowtv);
2146 CLIENTS_LOCK (sink);
2147 /* add buffer to queue */
2148 g_array_prepend_val (sink->bufqueue, buf);
2149 queuelen = sink->bufqueue->len;
2151 if (sink->units_max > 0)
2152 max_buffers = get_buffers_max (sink, sink->units_max);
2156 if (sink->units_soft_max > 0)
2157 soft_max_buffers = get_buffers_max (sink, sink->units_soft_max);
2159 soft_max_buffers = -1;
2160 GST_LOG_OBJECT (sink, "Using max %d, softmax %d", max_buffers,
2163 /* then loop over the clients and update the positions */
2164 max_buffer_usage = 0;
2167 cookie = sink->clients_cookie;
2168 for (clients = sink->clients; clients; clients = next) {
2169 GstTCPClient *client;
2171 if (cookie != sink->clients_cookie) {
2172 GST_DEBUG_OBJECT (sink, "Clients cookie outdated, restarting");
2176 client = (GstTCPClient *) clients->data;
2177 next = g_list_next (clients);
2180 GST_LOG_OBJECT (sink, "[fd %5d] client %p at position %d",
2181 client->fd.fd, client, client->bufpos);
2182 /* check soft max if needed, recover client */
2183 if (soft_max_buffers > 0 && client->bufpos >= soft_max_buffers) {
2186 newpos = gst_multi_fd_sink_recover_client (sink, client);
2187 if (newpos != client->bufpos) {
2188 client->dropped_buffers += client->bufpos - newpos;
2189 client->bufpos = newpos;
2190 client->discont = TRUE;
2191 GST_INFO_OBJECT (sink, "[fd %5d] client %p position reset to %d",
2192 client->fd.fd, client, client->bufpos);
2194 GST_INFO_OBJECT (sink,
2195 "[fd %5d] client %p not recovering position",
2196 client->fd.fd, client);
2199 /* check hard max and timeout, remove client */
2200 if ((max_buffers > 0 && client->bufpos >= max_buffers) ||
2202 && now - client->last_activity_time > sink->timeout)) {
2204 GST_WARNING_OBJECT (sink, "[fd %5d] client %p is too slow, removing",
2205 client->fd.fd, client);
2206 /* remove the client, the fd set will be cleared and the select thread
2207 * will be signaled */
2208 client->status = GST_CLIENT_STATUS_SLOW;
2209 /* set client to invalid position while being removed */
2210 client->bufpos = -1;
2211 gst_multi_fd_sink_remove_client_link (sink, clients);
2214 } else if (client->bufpos == 0 || client->new_connection) {
2215 /* can send data to this client now. need to signal the select thread that
2216 * the fd_set changed */
2217 gst_poll_fd_ctl_write (sink->fdset, &client->fd, TRUE);
2220 /* keep track of maximum buffer usage */
2221 if (client->bufpos > max_buffer_usage) {
2222 max_buffer_usage = client->bufpos;
2226 /* make sure we respect bytes-min, buffers-min and time-min when they are set */
2230 GST_LOG_OBJECT (sink,
2231 "extending queue %d to respect time_min %" GST_TIME_FORMAT
2232 ", bytes_min %d, buffers_min %d", max_buffer_usage,
2233 GST_TIME_ARGS (sink->time_min), sink->bytes_min, sink->buffers_min);
2235 /* get index where the limits are ok, we don't really care if all limits
2236 * are ok, we just queue as much as we need. We also don't compare against
2237 * the max limits. */
2238 find_limits (sink, &usage, sink->bytes_min, sink->buffers_min,
2239 sink->time_min, &max, -1, -1, -1);
2241 max_buffer_usage = MAX (max_buffer_usage, usage + 1);
2242 GST_LOG_OBJECT (sink, "extended queue to %d", max_buffer_usage);
2245 /* now look for sync points and make sure there is at least one
2246 * sync point in the queue. We only do this if the LATEST_KEYFRAME or
2247 * BURST_KEYFRAME mode is selected */
2248 if (sink->def_sync_method == GST_SYNC_METHOD_LATEST_KEYFRAME ||
2249 sink->def_sync_method == GST_SYNC_METHOD_BURST_KEYFRAME) {
2250 /* no point in searching beyond the queue length */
2251 gint limit = queuelen;
2254 /* no point in searching beyond the soft-max if any. */
2255 if (soft_max_buffers > 0) {
2256 limit = MIN (limit, soft_max_buffers);
2258 GST_LOG_OBJECT (sink,
2259 "extending queue to include sync point, now at %d, limit is %d",
2260 max_buffer_usage, limit);
2261 for (i = 0; i < limit; i++) {
2262 buf = g_array_index (sink->bufqueue, GstBuffer *, i);
2263 if (is_sync_frame (sink, buf)) {
2264 /* found a sync frame, now extend the buffer usage to
2265 * include at least this frame. */
2266 max_buffer_usage = MAX (max_buffer_usage, i);
2270 GST_LOG_OBJECT (sink, "max buffer usage is now %d", max_buffer_usage);
2273 GST_LOG_OBJECT (sink, "len %d, usage %d", queuelen, max_buffer_usage);
2275 /* nobody is referencing units after max_buffer_usage so we can
2276 * remove them from the queue. We remove them in reverse order as
2277 * this is the most optimal for GArray. */
2278 for (i = queuelen - 1; i > max_buffer_usage; i--) {
2281 /* queue exceeded max size */
2283 old = g_array_index (sink->bufqueue, GstBuffer *, i);
2284 sink->bufqueue = g_array_remove_index (sink->bufqueue, i);
2286 /* unref tail buffer */
2287 gst_buffer_unref (old);
2289 /* save for stats */
2290 sink->buffers_queued = max_buffer_usage;
2291 CLIENTS_UNLOCK (sink);
2293 /* and send a signal to thread if fd_set changed */
2295 gst_poll_restart (sink->fdset);
2299 /* Handle the clients. Basically does a blocking select for one
2300 * of the client fds to become read or writable. We also have a
2301 * filedescriptor to receive commands on that we need to check.
2303 * After going out of the select call, we read and write to all
2304 * clients that can do so. Badly behaving clients are put on a
2305 * garbage list and removed.
2308 gst_multi_fd_sink_handle_clients (GstMultiFdSink * sink)
2311 GList *clients, *next;
2313 GstMultiFdSinkClass *fclass;
2316 fclass = GST_MULTI_FD_SINK_GET_CLASS (sink);
2322 * - server socket input (ie, new client connections)
2323 * - client socket input (ie, clients saying goodbye)
2324 * - client socket output (ie, client reads) */
2325 GST_LOG_OBJECT (sink, "waiting on action on fdset");
2326 result = gst_poll_wait (sink->fdset, GST_CLOCK_TIME_NONE);
2328 /* < 0 is an error, 0 just means a timeout happened, which is impossible */
2330 GST_WARNING_OBJECT (sink, "wait failed: %s (%d)", g_strerror (errno),
2332 if (errno == EBADF) {
2333 /* ok, so one or more of the fds is invalid. We loop over them to find
2334 * the ones that give an error to the F_GETFL fcntl. */
2335 CLIENTS_LOCK (sink);
2337 cookie = sink->clients_cookie;
2338 for (clients = sink->clients; clients; clients = next) {
2339 GstTCPClient *client;
2344 if (cookie != sink->clients_cookie) {
2345 GST_DEBUG_OBJECT (sink, "Cookie changed finding bad fd");
2349 client = (GstTCPClient *) clients->data;
2350 next = g_list_next (clients);
2354 res = fcntl (fd, F_GETFL, &flags);
2356 GST_WARNING_OBJECT (sink, "fnctl failed for %d, removing: %s (%d)",
2357 fd, g_strerror (errno), errno);
2358 if (errno == EBADF) {
2359 client->status = GST_CLIENT_STATUS_ERROR;
2360 /* releases the CLIENTS lock */
2361 gst_multi_fd_sink_remove_client_link (sink, clients);
2365 CLIENTS_UNLOCK (sink);
2366 /* after this, go back in the select loop as the read/writefds
2369 } else if (errno == EINTR) {
2370 /* interrupted system call, just redo the wait */
2372 } else if (errno == EBUSY) {
2373 /* the call to gst_poll_wait() was flushed */
2376 /* this is quite bad... */
2377 GST_ELEMENT_ERROR (sink, RESOURCE, READ, (NULL),
2378 ("select failed: %s (%d)", g_strerror (errno), errno));
2382 GST_LOG_OBJECT (sink, "wait done: %d sockets with events", result);
2384 } while (try_again);
2386 /* subclasses can check fdset with this virtual function */
2388 fclass->wait (sink, sink->fdset);
2390 /* Check the clients */
2391 CLIENTS_LOCK (sink);
2394 cookie = sink->clients_cookie;
2395 for (clients = sink->clients; clients; clients = next) {
2396 GstTCPClient *client;
2398 if (sink->clients_cookie != cookie) {
2399 GST_DEBUG_OBJECT (sink, "Restarting loop, cookie out of date");
2403 client = (GstTCPClient *) clients->data;
2404 next = g_list_next (clients);
2406 if (client->status != GST_CLIENT_STATUS_FLUSHING
2407 && client->status != GST_CLIENT_STATUS_OK) {
2408 gst_multi_fd_sink_remove_client_link (sink, clients);
2412 if (gst_poll_fd_has_closed (sink->fdset, &client->fd)) {
2413 client->status = GST_CLIENT_STATUS_CLOSED;
2414 gst_multi_fd_sink_remove_client_link (sink, clients);
2417 if (gst_poll_fd_has_error (sink->fdset, &client->fd)) {
2418 GST_WARNING_OBJECT (sink, "gst_poll_fd_has_error for %d", client->fd.fd);
2419 client->status = GST_CLIENT_STATUS_ERROR;
2420 gst_multi_fd_sink_remove_client_link (sink, clients);
2423 if (gst_poll_fd_can_read (sink->fdset, &client->fd)) {
2424 /* handle client read */
2425 if (!gst_multi_fd_sink_handle_client_read (sink, client)) {
2426 gst_multi_fd_sink_remove_client_link (sink, clients);
2430 if (gst_poll_fd_can_write (sink->fdset, &client->fd)) {
2431 /* handle client write */
2432 if (!gst_multi_fd_sink_handle_client_write (sink, client)) {
2433 gst_multi_fd_sink_remove_client_link (sink, clients);
2438 CLIENTS_UNLOCK (sink);
2441 /* we handle the client communication in another thread so that we do not block
2442 * the gstreamer thread while we select() on the client fds */
2444 gst_multi_fd_sink_thread (GstMultiFdSink * sink)
2446 while (sink->running) {
2447 gst_multi_fd_sink_handle_clients (sink);
2452 static GstFlowReturn
2453 gst_multi_fd_sink_render (GstBaseSink * bsink, GstBuffer * buf)
2455 GstMultiFdSink *sink;
2457 GstCaps *bufcaps, *padcaps;
2459 sink = GST_MULTI_FD_SINK (bsink);
2461 g_return_val_if_fail (GST_OBJECT_FLAG_IS_SET (sink, GST_MULTI_FD_SINK_OPEN),
2462 GST_FLOW_WRONG_STATE);
2464 /* since we check every buffer for streamheader caps, we need to make
2465 * sure every buffer has caps set */
2466 bufcaps = gst_buffer_get_caps (buf);
2467 padcaps = GST_PAD_CAPS (GST_BASE_SINK_PAD (bsink));
2469 /* make sure we have caps on the pad */
2470 if (!padcaps && !bufcaps)
2473 /* get IN_CAPS first, code below might mess with the flags */
2474 in_caps = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
2476 /* stamp the buffer with previous caps if no caps set */
2478 if (!gst_buffer_is_metadata_writable (buf)) {
2479 /* metadata is not writable, copy will be made and original buffer
2480 * will be unreffed so we need to ref so that we don't lose the
2481 * buffer in the render method. */
2482 gst_buffer_ref (buf);
2483 /* the new buffer is ours only, we keep it out of the scope of this
2485 buf = gst_buffer_make_metadata_writable (buf);
2487 /* else the metadata is writable, we ref because we keep the buffer
2488 * out of the scope of this method */
2489 gst_buffer_ref (buf);
2491 /* buffer metadata is writable now, set the caps */
2492 gst_buffer_set_caps (buf, padcaps);
2494 gst_caps_unref (bufcaps);
2496 /* since we keep this buffer out of the scope of this method */
2497 gst_buffer_ref (buf);
2500 GST_LOG_OBJECT (sink, "received buffer %p, in_caps: %s, offset %"
2501 G_GINT64_FORMAT ", offset_end %" G_GINT64_FORMAT
2502 ", timestamp %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2503 buf, in_caps ? "yes" : "no", GST_BUFFER_OFFSET (buf),
2504 GST_BUFFER_OFFSET_END (buf),
2505 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
2506 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
2508 /* if we get IN_CAPS buffers, but the previous buffer was not IN_CAPS,
2509 * it means we're getting new streamheader buffers, and we should clear
2511 if (in_caps && sink->previous_buffer_in_caps == FALSE) {
2512 GST_DEBUG_OBJECT (sink,
2513 "receiving new IN_CAPS buffers, clearing old streamheader");
2514 g_slist_foreach (sink->streamheader, (GFunc) gst_mini_object_unref, NULL);
2515 g_slist_free (sink->streamheader);
2516 sink->streamheader = NULL;
2519 /* save the current in_caps */
2520 sink->previous_buffer_in_caps = in_caps;
2522 /* if the incoming buffer is marked as IN CAPS, then we assume for now
2523 * it's a streamheader that needs to be sent to each new client, so we
2524 * put it on our internal list of streamheader buffers.
2525 * FIXME: we could check if the buffer's contents are in fact part of the
2526 * current streamheader.
2528 * We don't send the buffer to the client, since streamheaders are sent
2529 * separately when necessary. */
2531 GST_DEBUG_OBJECT (sink,
2532 "appending IN_CAPS buffer with length %d to streamheader",
2533 GST_BUFFER_SIZE (buf));
2534 sink->streamheader = g_slist_append (sink->streamheader, buf);
2536 /* queue the buffer, this is a regular data buffer. */
2537 gst_multi_fd_sink_queue_buffer (sink, buf);
2539 sink->bytes_to_serve += GST_BUFFER_SIZE (buf);
2546 GST_ELEMENT_ERROR (sink, CORE, NEGOTIATION, (NULL),
2547 ("Received first buffer without caps set"));
2548 return GST_FLOW_NOT_NEGOTIATED;
2553 gst_multi_fd_sink_set_property (GObject * object, guint prop_id,
2554 const GValue * value, GParamSpec * pspec)
2556 GstMultiFdSink *multifdsink;
2558 multifdsink = GST_MULTI_FD_SINK (object);
2562 multifdsink->mode = g_value_get_enum (value);
2564 case PROP_BUFFERS_MAX:
2565 multifdsink->units_max = g_value_get_int (value);
2567 case PROP_BUFFERS_SOFT_MAX:
2568 multifdsink->units_soft_max = g_value_get_int (value);
2571 multifdsink->time_min = g_value_get_int64 (value);
2573 case PROP_BYTES_MIN:
2574 multifdsink->bytes_min = g_value_get_int (value);
2576 case PROP_BUFFERS_MIN:
2577 multifdsink->buffers_min = g_value_get_int (value);
2579 case PROP_UNIT_TYPE:
2580 multifdsink->unit_type = g_value_get_enum (value);
2582 case PROP_UNITS_MAX:
2583 multifdsink->units_max = g_value_get_int64 (value);
2585 case PROP_UNITS_SOFT_MAX:
2586 multifdsink->units_soft_max = g_value_get_int64 (value);
2588 case PROP_RECOVER_POLICY:
2589 multifdsink->recover_policy = g_value_get_enum (value);
2592 multifdsink->timeout = g_value_get_uint64 (value);
2594 case PROP_SYNC_METHOD:
2595 multifdsink->def_sync_method = g_value_get_enum (value);
2597 case PROP_BURST_UNIT:
2598 multifdsink->def_burst_unit = g_value_get_enum (value);
2600 case PROP_BURST_VALUE:
2601 multifdsink->def_burst_value = g_value_get_uint64 (value);
2604 multifdsink->qos_dscp = g_value_get_int (value);
2605 setup_dscp (multifdsink);
2607 case PROP_HANDLE_READ:
2608 multifdsink->handle_read = g_value_get_boolean (value);
2610 case PROP_RESEND_STREAMHEADER:
2611 multifdsink->resend_streamheader = g_value_get_boolean (value);
2615 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2621 gst_multi_fd_sink_get_property (GObject * object, guint prop_id, GValue * value,
2624 GstMultiFdSink *multifdsink;
2626 multifdsink = GST_MULTI_FD_SINK (object);
2630 g_value_set_enum (value, multifdsink->mode);
2632 case PROP_BUFFERS_MAX:
2633 g_value_set_int (value, multifdsink->units_max);
2635 case PROP_BUFFERS_SOFT_MAX:
2636 g_value_set_int (value, multifdsink->units_soft_max);
2639 g_value_set_int64 (value, multifdsink->time_min);
2641 case PROP_BYTES_MIN:
2642 g_value_set_int (value, multifdsink->bytes_min);
2644 case PROP_BUFFERS_MIN:
2645 g_value_set_int (value, multifdsink->buffers_min);
2647 case PROP_BUFFERS_QUEUED:
2648 g_value_set_uint (value, multifdsink->buffers_queued);
2650 case PROP_BYTES_QUEUED:
2651 g_value_set_uint (value, multifdsink->bytes_queued);
2653 case PROP_TIME_QUEUED:
2654 g_value_set_uint64 (value, multifdsink->time_queued);
2656 case PROP_UNIT_TYPE:
2657 g_value_set_enum (value, multifdsink->unit_type);
2659 case PROP_UNITS_MAX:
2660 g_value_set_int64 (value, multifdsink->units_max);
2662 case PROP_UNITS_SOFT_MAX:
2663 g_value_set_int64 (value, multifdsink->units_soft_max);
2665 case PROP_RECOVER_POLICY:
2666 g_value_set_enum (value, multifdsink->recover_policy);
2669 g_value_set_uint64 (value, multifdsink->timeout);
2671 case PROP_SYNC_METHOD:
2672 g_value_set_enum (value, multifdsink->def_sync_method);
2674 case PROP_BYTES_TO_SERVE:
2675 g_value_set_uint64 (value, multifdsink->bytes_to_serve);
2677 case PROP_BYTES_SERVED:
2678 g_value_set_uint64 (value, multifdsink->bytes_served);
2680 case PROP_BURST_UNIT:
2681 g_value_set_enum (value, multifdsink->def_burst_unit);
2683 case PROP_BURST_VALUE:
2684 g_value_set_uint64 (value, multifdsink->def_burst_value);
2687 g_value_set_int (value, multifdsink->qos_dscp);
2689 case PROP_HANDLE_READ:
2690 g_value_set_boolean (value, multifdsink->handle_read);
2692 case PROP_RESEND_STREAMHEADER:
2693 g_value_set_boolean (value, multifdsink->resend_streamheader);
2696 g_value_set_uint (value, g_hash_table_size (multifdsink->fd_hash));
2700 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2706 /* create a socket for sending to remote machine */
2708 gst_multi_fd_sink_start (GstBaseSink * bsink)
2710 GstMultiFdSinkClass *fclass;
2711 GstMultiFdSink *this;
2713 if (GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_FD_SINK_OPEN))
2716 this = GST_MULTI_FD_SINK (bsink);
2717 fclass = GST_MULTI_FD_SINK_GET_CLASS (this);
2719 GST_INFO_OBJECT (this, "starting in mode %d", this->mode);
2720 if ((this->fdset = gst_poll_new (TRUE)) == NULL)
2723 this->streamheader = NULL;
2724 this->bytes_to_serve = 0;
2725 this->bytes_served = 0;
2728 fclass->init (this);
2731 this->running = TRUE;
2732 this->thread = g_thread_create ((GThreadFunc) gst_multi_fd_sink_thread,
2735 GST_OBJECT_FLAG_SET (this, GST_MULTI_FD_SINK_OPEN);
2742 GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ_WRITE, (NULL),
2749 multifdsink_hash_remove (gpointer key, gpointer value, gpointer data)
2755 gst_multi_fd_sink_stop (GstBaseSink * bsink)
2757 GstMultiFdSinkClass *fclass;
2758 GstMultiFdSink *this;
2762 this = GST_MULTI_FD_SINK (bsink);
2763 fclass = GST_MULTI_FD_SINK_GET_CLASS (this);
2765 if (!GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_FD_SINK_OPEN))
2768 this->running = FALSE;
2770 gst_poll_set_flushing (this->fdset, TRUE);
2772 GST_DEBUG_OBJECT (this, "joining thread");
2773 g_thread_join (this->thread);
2774 GST_DEBUG_OBJECT (this, "joined thread");
2775 this->thread = NULL;
2778 /* free the clients */
2779 gst_multi_fd_sink_clear (this);
2781 if (this->streamheader) {
2782 g_slist_foreach (this->streamheader, (GFunc) gst_mini_object_unref, NULL);
2783 g_slist_free (this->streamheader);
2784 this->streamheader = NULL;
2788 fclass->close (this);
2791 gst_poll_free (this->fdset);
2794 g_hash_table_foreach_remove (this->fd_hash, multifdsink_hash_remove, this);
2796 /* remove all queued buffers */
2797 if (this->bufqueue) {
2798 GST_DEBUG_OBJECT (this, "Emptying bufqueue with %d buffers",
2799 this->bufqueue->len);
2800 for (i = this->bufqueue->len - 1; i >= 0; --i) {
2801 buf = g_array_index (this->bufqueue, GstBuffer *, i);
2802 GST_LOG_OBJECT (this, "Removing buffer %p (%d) with refcount %d", buf, i,
2803 GST_MINI_OBJECT_REFCOUNT (buf));
2804 gst_buffer_unref (buf);
2805 this->bufqueue = g_array_remove_index (this->bufqueue, i);
2807 /* freeing the array is done in _finalize */
2809 GST_OBJECT_FLAG_UNSET (this, GST_MULTI_FD_SINK_OPEN);
2814 static GstStateChangeReturn
2815 gst_multi_fd_sink_change_state (GstElement * element, GstStateChange transition)
2817 GstMultiFdSink *sink;
2818 GstStateChangeReturn ret;
2820 sink = GST_MULTI_FD_SINK (element);
2822 /* we disallow changing the state from the streaming thread */
2823 if (g_thread_self () == sink->thread)
2824 return GST_STATE_CHANGE_FAILURE;
2827 switch (transition) {
2828 case GST_STATE_CHANGE_NULL_TO_READY:
2829 if (!gst_multi_fd_sink_start (GST_BASE_SINK (sink)))
2832 case GST_STATE_CHANGE_READY_TO_PAUSED:
2834 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
2840 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
2842 switch (transition) {
2843 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
2845 case GST_STATE_CHANGE_PAUSED_TO_READY:
2847 case GST_STATE_CHANGE_READY_TO_NULL:
2848 gst_multi_fd_sink_stop (GST_BASE_SINK (sink));
2858 /* error message was posted */
2859 return GST_STATE_CHANGE_FAILURE;