f51ca5ae7591f819f98283f030326176aaa63fd7
1 /* GStreamer
2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
4 * 2005 Wim Taymans <wim@fluendo.com>
5 *
6 * gstidentity.c:
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
22 */
23 /**
24 * SECTION:element-identity
25 *
26 * Dummy element that passes incoming data through unmodified. It has some
27 * useful diagnostic functions, such as offset and timestamp checking.
28 */
30 #ifdef HAVE_CONFIG_H
31 # include "config.h"
32 #endif
34 #include <stdlib.h>
36 #include "../../gst/gst-i18n-lib.h"
37 #include "gstidentity.h"
38 #include <gst/gstmarshal.h>
40 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
41 GST_PAD_SINK,
42 GST_PAD_ALWAYS,
43 GST_STATIC_CAPS_ANY);
45 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
46 GST_PAD_SRC,
47 GST_PAD_ALWAYS,
48 GST_STATIC_CAPS_ANY);
50 GST_DEBUG_CATEGORY_STATIC (gst_identity_debug);
51 #define GST_CAT_DEFAULT gst_identity_debug
53 /* Identity signals and args */
54 enum
55 {
56 SIGNAL_HANDOFF,
57 /* FILL ME */
58 LAST_SIGNAL
59 };
61 #define DEFAULT_SLEEP_TIME 0
62 #define DEFAULT_DUPLICATE 1
63 #define DEFAULT_ERROR_AFTER -1
64 #define DEFAULT_DROP_PROBABILITY 0.0
65 #define DEFAULT_DATARATE 0
66 #define DEFAULT_SILENT FALSE
67 #define DEFAULT_SINGLE_SEGMENT FALSE
68 #define DEFAULT_DUMP FALSE
69 #define DEFAULT_SYNC FALSE
70 #define DEFAULT_CHECK_PERFECT FALSE
71 #define DEFAULT_CHECK_IMPERFECT_TIMESTAMP FALSE
72 #define DEFAULT_CHECK_IMPERFECT_OFFSET FALSE
73 #define DEFAULT_SIGNAL_HANDOFFS TRUE
75 enum
76 {
77 PROP_0,
78 PROP_SLEEP_TIME,
79 PROP_ERROR_AFTER,
80 PROP_DROP_PROBABILITY,
81 PROP_DATARATE,
82 PROP_SILENT,
83 PROP_SINGLE_SEGMENT,
84 PROP_LAST_MESSAGE,
85 PROP_DUMP,
86 PROP_SYNC,
87 PROP_CHECK_PERFECT,
88 PROP_CHECK_IMPERFECT_TIMESTAMP,
89 PROP_CHECK_IMPERFECT_OFFSET,
90 PROP_SIGNAL_HANDOFFS
91 };
94 #define _do_init(bla) \
95 GST_DEBUG_CATEGORY_INIT (gst_identity_debug, "identity", 0, "identity element");
97 GST_BOILERPLATE_FULL (GstIdentity, gst_identity, GstBaseTransform,
98 GST_TYPE_BASE_TRANSFORM, _do_init);
100 static void gst_identity_finalize (GObject * object);
101 static void gst_identity_set_property (GObject * object, guint prop_id,
102 const GValue * value, GParamSpec * pspec);
103 static void gst_identity_get_property (GObject * object, guint prop_id,
104 GValue * value, GParamSpec * pspec);
106 static gboolean gst_identity_event (GstBaseTransform * trans, GstEvent * event);
107 static GstFlowReturn gst_identity_transform_ip (GstBaseTransform * trans,
108 GstBuffer * buf);
109 static GstFlowReturn gst_identity_prepare_output_buffer (GstBaseTransform
110 * trans, GstBuffer * in_buf, gint out_size, GstCaps * out_caps,
111 GstBuffer ** out_buf);
112 static gboolean gst_identity_start (GstBaseTransform * trans);
113 static gboolean gst_identity_stop (GstBaseTransform * trans);
114 static GstStateChangeReturn gst_identity_change_state (GstElement * element,
115 GstStateChange transition);
117 static guint gst_identity_signals[LAST_SIGNAL] = { 0 };
119 static GParamSpec *pspec_last_message = NULL;
121 static void
122 gst_identity_base_init (gpointer g_class)
123 {
124 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
126 gst_element_class_set_details_simple (gstelement_class,
127 "Identity",
128 "Generic",
129 "Pass data without modification", "Erik Walthinsen <omega@cse.ogi.edu>");
130 gst_element_class_add_pad_template (gstelement_class,
131 gst_static_pad_template_get (&srctemplate));
132 gst_element_class_add_pad_template (gstelement_class,
133 gst_static_pad_template_get (&sinktemplate));
134 }
136 static void
137 gst_identity_finalize (GObject * object)
138 {
139 GstIdentity *identity;
141 identity = GST_IDENTITY (object);
143 g_free (identity->last_message);
145 #if !GLIB_CHECK_VERSION(2,26,0)
146 g_static_rec_mutex_free (&identity->notify_lock);
147 #endif
149 G_OBJECT_CLASS (parent_class)->finalize (object);
150 }
152 /* fixme: do something about this */
153 static void
154 marshal_VOID__MINIOBJECT (GClosure * closure, GValue * return_value,
155 guint n_param_values, const GValue * param_values, gpointer invocation_hint,
156 gpointer marshal_data)
157 {
158 typedef void (*marshalfunc_VOID__MINIOBJECT) (gpointer obj, gpointer arg1,
159 gpointer data2);
160 register marshalfunc_VOID__MINIOBJECT callback;
161 register GCClosure *cc = (GCClosure *) closure;
162 register gpointer data1, data2;
164 g_return_if_fail (n_param_values == 2);
166 if (G_CCLOSURE_SWAP_DATA (closure)) {
167 data1 = closure->data;
168 data2 = g_value_peek_pointer (param_values + 0);
169 } else {
170 data1 = g_value_peek_pointer (param_values + 0);
171 data2 = closure->data;
172 }
173 callback =
174 (marshalfunc_VOID__MINIOBJECT) (marshal_data ? marshal_data :
175 cc->callback);
177 callback (data1, gst_value_get_mini_object (param_values + 1), data2);
178 }
180 static void
181 gst_identity_class_init (GstIdentityClass * klass)
182 {
183 GObjectClass *gobject_class;
184 GstElementClass *gstelement_class;
185 GstBaseTransformClass *gstbasetrans_class;
187 gobject_class = G_OBJECT_CLASS (klass);
188 gstelement_class = GST_ELEMENT_CLASS (klass);
189 gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);
191 gobject_class->set_property = gst_identity_set_property;
192 gobject_class->get_property = gst_identity_get_property;
194 g_object_class_install_property (gobject_class, PROP_SLEEP_TIME,
195 g_param_spec_uint ("sleep-time", "Sleep time",
196 "Microseconds to sleep between processing", 0, G_MAXUINT,
197 DEFAULT_SLEEP_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
198 g_object_class_install_property (gobject_class, PROP_ERROR_AFTER,
199 g_param_spec_int ("error-after", "Error After", "Error after N buffers",
200 G_MININT, G_MAXINT, DEFAULT_ERROR_AFTER,
201 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
202 g_object_class_install_property (gobject_class, PROP_DROP_PROBABILITY,
203 g_param_spec_float ("drop-probability", "Drop Probability",
204 "The Probability a buffer is dropped", 0.0, 1.0,
205 DEFAULT_DROP_PROBABILITY,
206 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
207 g_object_class_install_property (gobject_class, PROP_DATARATE,
208 g_param_spec_int ("datarate", "Datarate",
209 "(Re)timestamps buffers with number of bytes per second (0 = inactive)",
210 0, G_MAXINT, DEFAULT_DATARATE,
211 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
212 g_object_class_install_property (gobject_class, PROP_SILENT,
213 g_param_spec_boolean ("silent", "silent", "silent", DEFAULT_SILENT,
214 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
215 g_object_class_install_property (gobject_class, PROP_SINGLE_SEGMENT,
216 g_param_spec_boolean ("single-segment", "Single Segment",
217 "Timestamp buffers and eat newsegments so as to appear as one segment",
218 DEFAULT_SINGLE_SEGMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
219 pspec_last_message = g_param_spec_string ("last-message", "last-message",
220 "last-message", NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
221 g_object_class_install_property (gobject_class, PROP_LAST_MESSAGE,
222 pspec_last_message);
223 g_object_class_install_property (gobject_class, PROP_DUMP,
224 g_param_spec_boolean ("dump", "Dump", "Dump buffer contents to stdout",
225 DEFAULT_DUMP, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
226 g_object_class_install_property (gobject_class, PROP_SYNC,
227 g_param_spec_boolean ("sync", "Synchronize",
228 "Synchronize to pipeline clock", DEFAULT_SYNC,
229 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
230 g_object_class_install_property (gobject_class, PROP_CHECK_PERFECT,
231 g_param_spec_boolean ("check-perfect", "Check For Perfect Stream",
232 "Verify that the stream is time- and data-contiguous. "
233 "This only logs in the debug log. This will be deprecated in favor "
234 "of the check-imperfect-timestamp/offset properties.",
235 DEFAULT_CHECK_PERFECT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
236 g_object_class_install_property (gobject_class,
237 PROP_CHECK_IMPERFECT_TIMESTAMP,
238 g_param_spec_boolean ("check-imperfect-timestamp",
239 "Check for discontiguous timestamps",
240 "Send element messages if timestamps and durations do not match up",
241 DEFAULT_CHECK_IMPERFECT_TIMESTAMP,
242 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
243 g_object_class_install_property (gobject_class, PROP_CHECK_IMPERFECT_OFFSET,
244 g_param_spec_boolean ("check-imperfect-offset",
245 "Check for discontiguous offset",
246 "Send element messages if offset and offset_end do not match up",
247 DEFAULT_CHECK_IMPERFECT_OFFSET,
248 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
250 /**
251 * GstIdentity:signal-handoffs
252 *
253 * If set to #TRUE, the identity will emit a handoff signal when handling a buffer.
254 * When set to #FALSE, no signal will be emited, which might improve performance.
255 *
256 * Since: 0.10.16
257 */
258 g_object_class_install_property (gobject_class, PROP_SIGNAL_HANDOFFS,
259 g_param_spec_boolean ("signal-handoffs",
260 "Signal handoffs", "Send a signal before pushing the buffer",
261 DEFAULT_SIGNAL_HANDOFFS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
263 /**
264 * GstIdentity::handoff:
265 * @identity: the identity instance
266 * @buffer: the buffer that just has been received
267 * @pad: the pad that received it
268 *
269 * This signal gets emitted before passing the buffer downstream.
270 */
271 gst_identity_signals[SIGNAL_HANDOFF] =
272 g_signal_new ("handoff", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
273 G_STRUCT_OFFSET (GstIdentityClass, handoff), NULL, NULL,
274 marshal_VOID__MINIOBJECT, G_TYPE_NONE, 1, GST_TYPE_BUFFER);
276 gobject_class->finalize = gst_identity_finalize;
278 gstelement_class->change_state =
279 GST_DEBUG_FUNCPTR (gst_identity_change_state);
281 gstbasetrans_class->event = GST_DEBUG_FUNCPTR (gst_identity_event);
282 gstbasetrans_class->transform_ip =
283 GST_DEBUG_FUNCPTR (gst_identity_transform_ip);
284 gstbasetrans_class->prepare_output_buffer =
285 GST_DEBUG_FUNCPTR (gst_identity_prepare_output_buffer);
286 gstbasetrans_class->start = GST_DEBUG_FUNCPTR (gst_identity_start);
287 gstbasetrans_class->stop = GST_DEBUG_FUNCPTR (gst_identity_stop);
288 }
290 static void
291 gst_identity_init (GstIdentity * identity, GstIdentityClass * g_class)
292 {
293 identity->sleep_time = DEFAULT_SLEEP_TIME;
294 identity->error_after = DEFAULT_ERROR_AFTER;
295 identity->drop_probability = DEFAULT_DROP_PROBABILITY;
296 identity->datarate = DEFAULT_DATARATE;
297 identity->silent = DEFAULT_SILENT;
298 identity->single_segment = DEFAULT_SINGLE_SEGMENT;
299 identity->sync = DEFAULT_SYNC;
300 identity->check_perfect = DEFAULT_CHECK_PERFECT;
301 identity->check_imperfect_timestamp = DEFAULT_CHECK_IMPERFECT_TIMESTAMP;
302 identity->check_imperfect_offset = DEFAULT_CHECK_IMPERFECT_OFFSET;
303 identity->dump = DEFAULT_DUMP;
304 identity->last_message = NULL;
305 identity->signal_handoffs = DEFAULT_SIGNAL_HANDOFFS;
307 #if !GLIB_CHECK_VERSION(2,26,0)
308 g_static_rec_mutex_init (&identity->notify_lock);
309 #endif
311 gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM_CAST (identity), TRUE);
312 }
314 static void
315 gst_identity_notify_last_message (GstIdentity * identity)
316 {
317 /* FIXME: this hacks around a bug in GLib/GObject: doing concurrent
318 * g_object_notify() on the same object might lead to crashes, see
319 * http://bugzilla.gnome.org/show_bug.cgi?id=166020#c60 and follow-ups.
320 * So we really don't want to do a g_object_notify() here for out-of-band
321 * events with the streaming thread possibly also doing a g_object_notify()
322 * for an in-band buffer or event. This is fixed in GLib >= 2.26 */
323 #if !GLIB_CHECK_VERSION(2,26,0)
324 g_static_rec_mutex_lock (&identity->notify_lock);
325 g_object_notify ((GObject *) identity, "last-message");
326 g_static_rec_mutex_unlock (&identity->notify_lock);
327 #else
328 g_object_notify_by_pspec ((GObject *) identity, pspec_last_message);
329 #endif
330 }
332 static gboolean
333 gst_identity_event (GstBaseTransform * trans, GstEvent * event)
334 {
335 GstIdentity *identity;
336 gboolean ret = TRUE;
338 identity = GST_IDENTITY (trans);
340 if (!identity->silent) {
341 const GstStructure *s;
342 gchar *sstr;
344 GST_OBJECT_LOCK (identity);
345 g_free (identity->last_message);
347 if ((s = gst_event_get_structure (event)))
348 sstr = gst_structure_to_string (s);
349 else
350 sstr = g_strdup ("");
352 identity->last_message =
353 g_strdup_printf ("event ******* (%s:%s) E (type: %d, %s) %p",
354 GST_DEBUG_PAD_NAME (trans->sinkpad), GST_EVENT_TYPE (event), sstr,
355 event);
356 g_free (sstr);
357 GST_OBJECT_UNLOCK (identity);
359 gst_identity_notify_last_message (identity);
360 }
362 if (identity->single_segment
363 && (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT)) {
364 if (trans->have_newsegment == FALSE) {
365 GstEvent *news;
366 GstFormat format;
368 gst_event_parse_new_segment (event, NULL, NULL, &format, NULL, NULL,
369 NULL);
371 /* This is the first newsegment, send out a (0, -1) newsegment */
372 news = gst_event_new_new_segment (TRUE, 1.0, format, 0, -1, 0);
374 gst_pad_event_default (trans->sinkpad, news);
375 }
376 }
378 /* Reset previous timestamp, duration and offsets on NEWSEGMENT
379 * to prevent false warnings when checking for perfect streams */
380 if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT) {
381 identity->prev_timestamp = identity->prev_duration = GST_CLOCK_TIME_NONE;
382 identity->prev_offset = identity->prev_offset_end = GST_BUFFER_OFFSET_NONE;
383 }
385 ret = parent_class->event (trans, event);
387 if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_START) {
388 GST_OBJECT_LOCK (identity);
389 if (identity->clock_id) {
390 GST_DEBUG_OBJECT (identity, "unlock clock wait");
391 gst_clock_id_unschedule (identity->clock_id);
392 gst_clock_id_unref (identity->clock_id);
393 identity->clock_id = NULL;
394 }
395 GST_OBJECT_UNLOCK (identity);
396 }
398 if (identity->single_segment
399 && (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT)) {
400 /* eat up segments */
401 ret = FALSE;
402 }
404 return ret;
405 }
407 static GstFlowReturn
408 gst_identity_prepare_output_buffer (GstBaseTransform * trans,
409 GstBuffer * in_buf, gint out_size, GstCaps * out_caps, GstBuffer ** out_buf)
410 {
411 GstIdentity *identity = GST_IDENTITY (trans);
413 /* only bother if we may have to alter metadata */
414 if (identity->datarate > 0 || identity->single_segment) {
415 if (gst_buffer_is_metadata_writable (in_buf))
416 *out_buf = gst_buffer_ref (in_buf);
417 else {
418 /* make even less writable */
419 gst_buffer_ref (in_buf);
420 /* extra ref is dropped going through the official process */
421 *out_buf = gst_buffer_make_metadata_writable (in_buf);
422 }
423 } else
424 *out_buf = gst_buffer_ref (in_buf);
426 return GST_FLOW_OK;
427 }
429 static void
430 gst_identity_check_perfect (GstIdentity * identity, GstBuffer * buf)
431 {
432 GstClockTime timestamp;
434 timestamp = GST_BUFFER_TIMESTAMP (buf);
436 /* see if we need to do perfect stream checking */
437 /* invalid timestamp drops us out of check. FIXME: maybe warn ? */
438 if (timestamp != GST_CLOCK_TIME_NONE) {
439 /* check if we had a previous buffer to compare to */
440 if (identity->prev_timestamp != GST_CLOCK_TIME_NONE &&
441 identity->prev_duration != GST_CLOCK_TIME_NONE) {
442 guint64 offset, t_expected;
443 gint64 dt;
445 t_expected = identity->prev_timestamp + identity->prev_duration;
446 dt = timestamp - t_expected;
447 if (dt != 0) {
448 GST_WARNING_OBJECT (identity,
449 "Buffer not time-contiguous with previous one: " "prev ts %"
450 GST_TIME_FORMAT ", prev dur %" GST_TIME_FORMAT ", new ts %"
451 GST_TIME_FORMAT " (expected ts %" GST_TIME_FORMAT ", delta=%c%"
452 GST_TIME_FORMAT ")", GST_TIME_ARGS (identity->prev_timestamp),
453 GST_TIME_ARGS (identity->prev_duration), GST_TIME_ARGS (timestamp),
454 GST_TIME_ARGS (t_expected), (dt < 0) ? '-' : '+',
455 GST_TIME_ARGS ((dt < 0) ? (GstClockTime) (-dt) : dt));
456 }
458 offset = GST_BUFFER_OFFSET (buf);
459 if (identity->prev_offset_end != offset &&
460 identity->prev_offset_end != GST_BUFFER_OFFSET_NONE &&
461 offset != GST_BUFFER_OFFSET_NONE) {
462 GST_WARNING_OBJECT (identity,
463 "Buffer not data-contiguous with previous one: "
464 "prev offset_end %" G_GINT64_FORMAT ", new offset %"
465 G_GINT64_FORMAT, identity->prev_offset_end, offset);
466 }
467 } else {
468 GST_DEBUG_OBJECT (identity, "can't check time-contiguity, no timestamp "
469 "and/or duration were set on previous buffer");
470 }
471 }
472 }
474 static void
475 gst_identity_check_imperfect_timestamp (GstIdentity * identity, GstBuffer * buf)
476 {
477 GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buf);
479 /* invalid timestamp drops us out of check. FIXME: maybe warn ? */
480 if (timestamp != GST_CLOCK_TIME_NONE) {
481 /* check if we had a previous buffer to compare to */
482 if (identity->prev_timestamp != GST_CLOCK_TIME_NONE &&
483 identity->prev_duration != GST_CLOCK_TIME_NONE) {
484 GstClockTime t_expected;
485 GstClockTimeDiff dt;
487 t_expected = identity->prev_timestamp + identity->prev_duration;
488 dt = GST_CLOCK_DIFF (t_expected, timestamp);
489 if (dt != 0) {
490 /*
491 * "imperfect-timestamp" bus message:
492 * @identity: the identity instance
493 * @prev-timestamp: the previous buffer timestamp
494 * @prev-duration: the previous buffer duration
495 * @prev-offset: the previous buffer offset
496 * @prev-offset-end: the previous buffer offset end
497 * @cur-timestamp: the current buffer timestamp
498 * @cur-duration: the current buffer duration
499 * @cur-offset: the current buffer offset
500 * @cur-offset-end: the current buffer offset end
501 *
502 * This bus message gets emitted if the check-imperfect-timestamp
503 * property is set and there is a gap in time between the
504 * last buffer and the newly received buffer.
505 */
506 gst_element_post_message (GST_ELEMENT (identity),
507 gst_message_new_element (GST_OBJECT (identity),
508 gst_structure_new ("imperfect-timestamp",
509 "prev-timestamp", G_TYPE_UINT64,
510 identity->prev_timestamp, "prev-duration", G_TYPE_UINT64,
511 identity->prev_duration, "prev-offset", G_TYPE_UINT64,
512 identity->prev_offset, "prev-offset-end", G_TYPE_UINT64,
513 identity->prev_offset_end, "cur-timestamp", G_TYPE_UINT64,
514 timestamp, "cur-duration", G_TYPE_UINT64,
515 GST_BUFFER_DURATION (buf), "cur-offset", G_TYPE_UINT64,
516 GST_BUFFER_OFFSET (buf), "cur-offset-end", G_TYPE_UINT64,
517 GST_BUFFER_OFFSET_END (buf), NULL)));
518 }
519 } else {
520 GST_DEBUG_OBJECT (identity, "can't check data-contiguity, no "
521 "offset_end was set on previous buffer");
522 }
523 }
524 }
526 static void
527 gst_identity_check_imperfect_offset (GstIdentity * identity, GstBuffer * buf)
528 {
529 guint64 offset;
531 offset = GST_BUFFER_OFFSET (buf);
533 if (identity->prev_offset_end != offset &&
534 identity->prev_offset_end != GST_BUFFER_OFFSET_NONE &&
535 offset != GST_BUFFER_OFFSET_NONE) {
536 /*
537 * "imperfect-offset" bus message:
538 * @identity: the identity instance
539 * @prev-timestamp: the previous buffer timestamp
540 * @prev-duration: the previous buffer duration
541 * @prev-offset: the previous buffer offset
542 * @prev-offset-end: the previous buffer offset end
543 * @cur-timestamp: the current buffer timestamp
544 * @cur-duration: the current buffer duration
545 * @cur-offset: the current buffer offset
546 * @cur-offset-end: the current buffer offset end
547 *
548 * This bus message gets emitted if the check-imperfect-offset
549 * property is set and there is a gap in offsets between the
550 * last buffer and the newly received buffer.
551 */
552 gst_element_post_message (GST_ELEMENT (identity),
553 gst_message_new_element (GST_OBJECT (identity),
554 gst_structure_new ("imperfect-offset", "prev-timestamp",
555 G_TYPE_UINT64, identity->prev_timestamp, "prev-duration",
556 G_TYPE_UINT64, identity->prev_duration, "prev-offset",
557 G_TYPE_UINT64, identity->prev_offset, "prev-offset-end",
558 G_TYPE_UINT64, identity->prev_offset_end, "cur-timestamp",
559 G_TYPE_UINT64, GST_BUFFER_TIMESTAMP (buf), "cur-duration",
560 G_TYPE_UINT64, GST_BUFFER_DURATION (buf), "cur-offset",
561 G_TYPE_UINT64, GST_BUFFER_OFFSET (buf), "cur-offset-end",
562 G_TYPE_UINT64, GST_BUFFER_OFFSET_END (buf), NULL)));
563 } else {
564 GST_DEBUG_OBJECT (identity, "can't check offset contiguity, no offset "
565 "and/or offset_end were set on previous buffer");
566 }
567 }
569 static const gchar *
570 print_pretty_time (gchar * ts_str, gsize ts_str_len, GstClockTime ts)
571 {
572 if (ts == GST_CLOCK_TIME_NONE)
573 return "none";
575 g_snprintf (ts_str, ts_str_len, "%" GST_TIME_FORMAT, GST_TIME_ARGS (ts));
576 return ts_str;
577 }
579 static void
580 gst_identity_update_last_message_for_buffer (GstIdentity * identity,
581 const gchar * action, GstBuffer * buf)
582 {
583 gchar ts_str[64], dur_str[64];
585 GST_OBJECT_LOCK (identity);
587 g_free (identity->last_message);
588 identity->last_message = g_strdup_printf ("%s ******* (%s:%s)i "
589 "(%u bytes, timestamp: %s, duration: %s, offset: %" G_GINT64_FORMAT ", "
590 "offset_end: % " G_GINT64_FORMAT ", flags: %d) %p", action,
591 GST_DEBUG_PAD_NAME (GST_BASE_TRANSFORM_CAST (identity)->sinkpad),
592 GST_BUFFER_SIZE (buf),
593 print_pretty_time (ts_str, sizeof (ts_str), GST_BUFFER_TIMESTAMP (buf)),
594 print_pretty_time (dur_str, sizeof (dur_str), GST_BUFFER_DURATION (buf)),
595 GST_BUFFER_OFFSET (buf), GST_BUFFER_OFFSET_END (buf),
596 GST_BUFFER_FLAGS (buf), buf);
598 GST_OBJECT_UNLOCK (identity);
600 gst_identity_notify_last_message (identity);
601 }
603 static GstFlowReturn
604 gst_identity_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
605 {
606 GstFlowReturn ret = GST_FLOW_OK;
607 GstIdentity *identity = GST_IDENTITY (trans);
608 GstClockTime runtimestamp = G_GINT64_CONSTANT (0);
610 if (identity->check_perfect)
611 gst_identity_check_perfect (identity, buf);
612 if (identity->check_imperfect_timestamp)
613 gst_identity_check_imperfect_timestamp (identity, buf);
614 if (identity->check_imperfect_offset)
615 gst_identity_check_imperfect_offset (identity, buf);
617 /* update prev values */
618 identity->prev_timestamp = GST_BUFFER_TIMESTAMP (buf);
619 identity->prev_duration = GST_BUFFER_DURATION (buf);
620 identity->prev_offset_end = GST_BUFFER_OFFSET_END (buf);
621 identity->prev_offset = GST_BUFFER_OFFSET (buf);
623 if (identity->error_after >= 0) {
624 identity->error_after--;
625 if (identity->error_after == 0) {
626 GST_ELEMENT_ERROR (identity, CORE, FAILED,
627 (_("Failed after iterations as requested.")), (NULL));
628 return GST_FLOW_ERROR;
629 }
630 }
632 if (identity->drop_probability > 0.0) {
633 if ((gfloat) (1.0 * rand () / (RAND_MAX)) < identity->drop_probability) {
634 if (!identity->silent) {
635 gst_identity_update_last_message_for_buffer (identity, "dropping", buf);
636 }
637 /* return DROPPED to basetransform. */
638 return GST_BASE_TRANSFORM_FLOW_DROPPED;
639 }
640 }
642 if (identity->dump) {
643 gst_util_dump_mem (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
644 }
646 if (!identity->silent) {
647 gst_identity_update_last_message_for_buffer (identity, "chain", buf);
648 }
650 if (identity->datarate > 0) {
651 GstClockTime time = gst_util_uint64_scale_int (identity->offset,
652 GST_SECOND, identity->datarate);
654 GST_BUFFER_TIMESTAMP (buf) = time;
655 GST_BUFFER_DURATION (buf) =
656 GST_BUFFER_SIZE (buf) * GST_SECOND / identity->datarate;
657 }
659 if (identity->signal_handoffs)
660 g_signal_emit (identity, gst_identity_signals[SIGNAL_HANDOFF], 0, buf);
662 if (trans->segment.format == GST_FORMAT_TIME)
663 runtimestamp = gst_segment_to_running_time (&trans->segment,
664 GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buf));
666 if ((identity->sync) && (trans->segment.format == GST_FORMAT_TIME)) {
667 GstClock *clock;
669 GST_OBJECT_LOCK (identity);
670 if ((clock = GST_ELEMENT (identity)->clock)) {
671 GstClockReturn cret;
672 GstClockTime timestamp;
674 timestamp = runtimestamp + GST_ELEMENT (identity)->base_time;
676 /* save id if we need to unlock */
677 identity->clock_id = gst_clock_new_single_shot_id (clock, timestamp);
678 GST_OBJECT_UNLOCK (identity);
680 cret = gst_clock_id_wait (identity->clock_id, NULL);
682 GST_OBJECT_LOCK (identity);
683 if (identity->clock_id) {
684 gst_clock_id_unref (identity->clock_id);
685 identity->clock_id = NULL;
686 }
687 if (cret == GST_CLOCK_UNSCHEDULED)
688 ret = GST_FLOW_UNEXPECTED;
689 }
690 GST_OBJECT_UNLOCK (identity);
691 }
693 identity->offset += GST_BUFFER_SIZE (buf);
695 if (identity->sleep_time && ret == GST_FLOW_OK)
696 g_usleep (identity->sleep_time);
698 if (identity->single_segment && (trans->segment.format == GST_FORMAT_TIME)
699 && (ret == GST_FLOW_OK)) {
700 GST_BUFFER_TIMESTAMP (buf) = runtimestamp;
701 GST_BUFFER_OFFSET (buf) = GST_CLOCK_TIME_NONE;
702 GST_BUFFER_OFFSET_END (buf) = GST_CLOCK_TIME_NONE;
703 }
705 return ret;
706 }
708 static void
709 gst_identity_set_property (GObject * object, guint prop_id,
710 const GValue * value, GParamSpec * pspec)
711 {
712 GstIdentity *identity;
714 identity = GST_IDENTITY (object);
716 switch (prop_id) {
717 case PROP_SLEEP_TIME:
718 identity->sleep_time = g_value_get_uint (value);
719 break;
720 case PROP_SILENT:
721 identity->silent = g_value_get_boolean (value);
722 break;
723 case PROP_SINGLE_SEGMENT:
724 identity->single_segment = g_value_get_boolean (value);
725 break;
726 case PROP_DUMP:
727 identity->dump = g_value_get_boolean (value);
728 break;
729 case PROP_ERROR_AFTER:
730 identity->error_after = g_value_get_int (value);
731 break;
732 case PROP_DROP_PROBABILITY:
733 identity->drop_probability = g_value_get_float (value);
734 break;
735 case PROP_DATARATE:
736 identity->datarate = g_value_get_int (value);
737 break;
738 case PROP_SYNC:
739 identity->sync = g_value_get_boolean (value);
740 break;
741 case PROP_CHECK_PERFECT:
742 identity->check_perfect = g_value_get_boolean (value);
743 break;
744 case PROP_CHECK_IMPERFECT_TIMESTAMP:
745 identity->check_imperfect_timestamp = g_value_get_boolean (value);
746 break;
747 case PROP_CHECK_IMPERFECT_OFFSET:
748 identity->check_imperfect_offset = g_value_get_boolean (value);
749 break;
750 case PROP_SIGNAL_HANDOFFS:
751 identity->signal_handoffs = g_value_get_boolean (value);
752 break;
753 default:
754 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
755 break;
756 }
757 }
759 static void
760 gst_identity_get_property (GObject * object, guint prop_id, GValue * value,
761 GParamSpec * pspec)
762 {
763 GstIdentity *identity;
765 identity = GST_IDENTITY (object);
767 switch (prop_id) {
768 case PROP_SLEEP_TIME:
769 g_value_set_uint (value, identity->sleep_time);
770 break;
771 case PROP_ERROR_AFTER:
772 g_value_set_int (value, identity->error_after);
773 break;
774 case PROP_DROP_PROBABILITY:
775 g_value_set_float (value, identity->drop_probability);
776 break;
777 case PROP_DATARATE:
778 g_value_set_int (value, identity->datarate);
779 break;
780 case PROP_SILENT:
781 g_value_set_boolean (value, identity->silent);
782 break;
783 case PROP_SINGLE_SEGMENT:
784 g_value_set_boolean (value, identity->single_segment);
785 break;
786 case PROP_DUMP:
787 g_value_set_boolean (value, identity->dump);
788 break;
789 case PROP_LAST_MESSAGE:
790 GST_OBJECT_LOCK (identity);
791 g_value_set_string (value, identity->last_message);
792 GST_OBJECT_UNLOCK (identity);
793 break;
794 case PROP_SYNC:
795 g_value_set_boolean (value, identity->sync);
796 break;
797 case PROP_CHECK_PERFECT:
798 g_value_set_boolean (value, identity->check_perfect);
799 break;
800 case PROP_CHECK_IMPERFECT_TIMESTAMP:
801 g_value_set_boolean (value, identity->check_imperfect_timestamp);
802 break;
803 case PROP_CHECK_IMPERFECT_OFFSET:
804 g_value_set_boolean (value, identity->check_imperfect_offset);
805 break;
806 case PROP_SIGNAL_HANDOFFS:
807 g_value_set_boolean (value, identity->signal_handoffs);
808 break;
809 default:
810 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
811 break;
812 }
813 }
815 static gboolean
816 gst_identity_start (GstBaseTransform * trans)
817 {
818 GstIdentity *identity;
820 identity = GST_IDENTITY (trans);
822 identity->offset = 0;
823 identity->prev_timestamp = GST_CLOCK_TIME_NONE;
824 identity->prev_duration = GST_CLOCK_TIME_NONE;
825 identity->prev_offset_end = GST_BUFFER_OFFSET_NONE;
826 identity->prev_offset = GST_BUFFER_OFFSET_NONE;
828 return TRUE;
829 }
831 static gboolean
832 gst_identity_stop (GstBaseTransform * trans)
833 {
834 GstIdentity *identity;
836 identity = GST_IDENTITY (trans);
838 GST_OBJECT_LOCK (identity);
839 g_free (identity->last_message);
840 identity->last_message = NULL;
841 GST_OBJECT_UNLOCK (identity);
843 return TRUE;
844 }
846 static GstStateChangeReturn
847 gst_identity_change_state (GstElement * element, GstStateChange transition)
848 {
849 GstStateChangeReturn ret;
850 GstIdentity *identity = GST_IDENTITY (element);
852 switch (transition) {
853 case GST_STATE_CHANGE_NULL_TO_READY:
854 break;
855 case GST_STATE_CHANGE_READY_TO_PAUSED:
856 break;
857 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
858 break;
859 case GST_STATE_CHANGE_PAUSED_TO_READY:
860 GST_OBJECT_LOCK (identity);
861 if (identity->clock_id) {
862 GST_DEBUG_OBJECT (identity, "unlock clock wait");
863 gst_clock_id_unschedule (identity->clock_id);
864 gst_clock_id_unref (identity->clock_id);
865 identity->clock_id = NULL;
866 }
867 GST_OBJECT_UNLOCK (identity);
868 break;
869 default:
870 break;
871 }
873 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
875 switch (transition) {
876 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
877 break;
878 case GST_STATE_CHANGE_PAUSED_TO_READY:
879 break;
880 case GST_STATE_CHANGE_READY_TO_NULL:
881 break;
882 default:
883 break;
884 }
886 return ret;
887 }