ba2026d4b10c1feeb9fe101a2d010cfaca6b2d99
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);
115 static guint gst_identity_signals[LAST_SIGNAL] = { 0 };
117 static GParamSpec *pspec_last_message = NULL;
119 static void
120 gst_identity_base_init (gpointer g_class)
121 {
122 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
124 gst_element_class_set_details_simple (gstelement_class,
125 "Identity",
126 "Generic",
127 "Pass data without modification", "Erik Walthinsen <omega@cse.ogi.edu>");
128 gst_element_class_add_pad_template (gstelement_class,
129 gst_static_pad_template_get (&srctemplate));
130 gst_element_class_add_pad_template (gstelement_class,
131 gst_static_pad_template_get (&sinktemplate));
132 }
134 static void
135 gst_identity_finalize (GObject * object)
136 {
137 GstIdentity *identity;
139 identity = GST_IDENTITY (object);
141 g_free (identity->last_message);
143 #if !GLIB_CHECK_VERSION(2,26,0)
144 g_static_rec_mutex_free (&identity->notify_lock);
145 #endif
147 G_OBJECT_CLASS (parent_class)->finalize (object);
148 }
150 /* fixme: do something about this */
151 static void
152 marshal_VOID__MINIOBJECT (GClosure * closure, GValue * return_value,
153 guint n_param_values, const GValue * param_values, gpointer invocation_hint,
154 gpointer marshal_data)
155 {
156 typedef void (*marshalfunc_VOID__MINIOBJECT) (gpointer obj, gpointer arg1,
157 gpointer data2);
158 register marshalfunc_VOID__MINIOBJECT callback;
159 register GCClosure *cc = (GCClosure *) closure;
160 register gpointer data1, data2;
162 g_return_if_fail (n_param_values == 2);
164 if (G_CCLOSURE_SWAP_DATA (closure)) {
165 data1 = closure->data;
166 data2 = g_value_peek_pointer (param_values + 0);
167 } else {
168 data1 = g_value_peek_pointer (param_values + 0);
169 data2 = closure->data;
170 }
171 callback =
172 (marshalfunc_VOID__MINIOBJECT) (marshal_data ? marshal_data :
173 cc->callback);
175 callback (data1, gst_value_get_mini_object (param_values + 1), data2);
176 }
178 static void
179 gst_identity_class_init (GstIdentityClass * klass)
180 {
181 GObjectClass *gobject_class;
182 GstBaseTransformClass *gstbasetrans_class;
184 gobject_class = G_OBJECT_CLASS (klass);
185 gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);
187 gobject_class->set_property = gst_identity_set_property;
188 gobject_class->get_property = gst_identity_get_property;
190 g_object_class_install_property (gobject_class, PROP_SLEEP_TIME,
191 g_param_spec_uint ("sleep-time", "Sleep time",
192 "Microseconds to sleep between processing", 0, G_MAXUINT,
193 DEFAULT_SLEEP_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
194 g_object_class_install_property (gobject_class, PROP_ERROR_AFTER,
195 g_param_spec_int ("error-after", "Error After", "Error after N buffers",
196 G_MININT, G_MAXINT, DEFAULT_ERROR_AFTER,
197 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
198 g_object_class_install_property (gobject_class, PROP_DROP_PROBABILITY,
199 g_param_spec_float ("drop-probability", "Drop Probability",
200 "The Probability a buffer is dropped", 0.0, 1.0,
201 DEFAULT_DROP_PROBABILITY,
202 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
203 g_object_class_install_property (gobject_class, PROP_DATARATE,
204 g_param_spec_int ("datarate", "Datarate",
205 "(Re)timestamps buffers with number of bytes per second (0 = inactive)",
206 0, G_MAXINT, DEFAULT_DATARATE,
207 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
208 g_object_class_install_property (gobject_class, PROP_SILENT,
209 g_param_spec_boolean ("silent", "silent", "silent", DEFAULT_SILENT,
210 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
211 g_object_class_install_property (gobject_class, PROP_SINGLE_SEGMENT,
212 g_param_spec_boolean ("single-segment", "Single Segment",
213 "Timestamp buffers and eat newsegments so as to appear as one segment",
214 DEFAULT_SINGLE_SEGMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
215 pspec_last_message = g_param_spec_string ("last-message", "last-message",
216 "last-message", NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
217 g_object_class_install_property (gobject_class, PROP_LAST_MESSAGE,
218 pspec_last_message);
219 g_object_class_install_property (gobject_class, PROP_DUMP,
220 g_param_spec_boolean ("dump", "Dump", "Dump buffer contents to stdout",
221 DEFAULT_DUMP, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
222 g_object_class_install_property (gobject_class, PROP_SYNC,
223 g_param_spec_boolean ("sync", "Synchronize",
224 "Synchronize to pipeline clock", DEFAULT_SYNC,
225 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
226 g_object_class_install_property (gobject_class, PROP_CHECK_PERFECT,
227 g_param_spec_boolean ("check-perfect", "Check For Perfect Stream",
228 "Verify that the stream is time- and data-contiguous. "
229 "This only logs in the debug log. This will be deprecated in favor "
230 "of the check-imperfect-timestamp/offset properties.",
231 DEFAULT_CHECK_PERFECT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
232 g_object_class_install_property (gobject_class,
233 PROP_CHECK_IMPERFECT_TIMESTAMP,
234 g_param_spec_boolean ("check-imperfect-timestamp",
235 "Check for discontiguous timestamps",
236 "Send element messages if timestamps and durations do not match up",
237 DEFAULT_CHECK_IMPERFECT_TIMESTAMP,
238 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
239 g_object_class_install_property (gobject_class, PROP_CHECK_IMPERFECT_OFFSET,
240 g_param_spec_boolean ("check-imperfect-offset",
241 "Check for discontiguous offset",
242 "Send element messages if offset and offset_end do not match up",
243 DEFAULT_CHECK_IMPERFECT_OFFSET,
244 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
246 /**
247 * GstIdentity:signal-handoffs
248 *
249 * If set to #TRUE, the identity will emit a handoff signal when handling a buffer.
250 * When set to #FALSE, no signal will be emited, which might improve performance.
251 *
252 * Since: 0.10.16
253 */
254 g_object_class_install_property (gobject_class, PROP_SIGNAL_HANDOFFS,
255 g_param_spec_boolean ("signal-handoffs",
256 "Signal handoffs", "Send a signal before pushing the buffer",
257 DEFAULT_SIGNAL_HANDOFFS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
259 /**
260 * GstIdentity::handoff:
261 * @identity: the identity instance
262 * @buffer: the buffer that just has been received
263 * @pad: the pad that received it
264 *
265 * This signal gets emitted before passing the buffer downstream.
266 */
267 gst_identity_signals[SIGNAL_HANDOFF] =
268 g_signal_new ("handoff", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
269 G_STRUCT_OFFSET (GstIdentityClass, handoff), NULL, NULL,
270 marshal_VOID__MINIOBJECT, G_TYPE_NONE, 1, GST_TYPE_BUFFER);
272 gobject_class->finalize = gst_identity_finalize;
274 gstbasetrans_class->event = GST_DEBUG_FUNCPTR (gst_identity_event);
275 gstbasetrans_class->transform_ip =
276 GST_DEBUG_FUNCPTR (gst_identity_transform_ip);
277 gstbasetrans_class->prepare_output_buffer =
278 GST_DEBUG_FUNCPTR (gst_identity_prepare_output_buffer);
279 gstbasetrans_class->start = GST_DEBUG_FUNCPTR (gst_identity_start);
280 gstbasetrans_class->stop = GST_DEBUG_FUNCPTR (gst_identity_stop);
281 }
283 static void
284 gst_identity_init (GstIdentity * identity, GstIdentityClass * g_class)
285 {
286 identity->sleep_time = DEFAULT_SLEEP_TIME;
287 identity->error_after = DEFAULT_ERROR_AFTER;
288 identity->drop_probability = DEFAULT_DROP_PROBABILITY;
289 identity->datarate = DEFAULT_DATARATE;
290 identity->silent = DEFAULT_SILENT;
291 identity->single_segment = DEFAULT_SINGLE_SEGMENT;
292 identity->sync = DEFAULT_SYNC;
293 identity->check_perfect = DEFAULT_CHECK_PERFECT;
294 identity->check_imperfect_timestamp = DEFAULT_CHECK_IMPERFECT_TIMESTAMP;
295 identity->check_imperfect_offset = DEFAULT_CHECK_IMPERFECT_OFFSET;
296 identity->dump = DEFAULT_DUMP;
297 identity->last_message = NULL;
298 identity->signal_handoffs = DEFAULT_SIGNAL_HANDOFFS;
300 #if !GLIB_CHECK_VERSION(2,26,0)
301 g_static_rec_mutex_init (&identity->notify_lock);
302 #endif
304 gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM_CAST (identity), TRUE);
305 }
307 static void
308 gst_identity_notify_last_message (GstIdentity * identity)
309 {
310 /* FIXME: this hacks around a bug in GLib/GObject: doing concurrent
311 * g_object_notify() on the same object might lead to crashes, see
312 * http://bugzilla.gnome.org/show_bug.cgi?id=166020#c60 and follow-ups.
313 * So we really don't want to do a g_object_notify() here for out-of-band
314 * events with the streaming thread possibly also doing a g_object_notify()
315 * for an in-band buffer or event. This is fixed in GLib >= 2.26 */
316 #if !GLIB_CHECK_VERSION(2,26,0)
317 g_static_rec_mutex_lock (&identity->notify_lock);
318 g_object_notify ((GObject *) identity, "last-message");
319 g_static_rec_mutex_unlock (&identity->notify_lock);
320 #else
321 g_object_notify_by_pspec ((GObject *) identity, pspec_last_message);
322 #endif
323 }
325 static gboolean
326 gst_identity_event (GstBaseTransform * trans, GstEvent * event)
327 {
328 GstIdentity *identity;
329 gboolean ret = TRUE;
331 identity = GST_IDENTITY (trans);
333 if (!identity->silent) {
334 const GstStructure *s;
335 gchar *sstr;
337 GST_OBJECT_LOCK (identity);
338 g_free (identity->last_message);
340 if ((s = gst_event_get_structure (event)))
341 sstr = gst_structure_to_string (s);
342 else
343 sstr = g_strdup ("");
345 identity->last_message =
346 g_strdup_printf ("event ******* (%s:%s) E (type: %d, %s) %p",
347 GST_DEBUG_PAD_NAME (trans->sinkpad), GST_EVENT_TYPE (event), sstr,
348 event);
349 g_free (sstr);
350 GST_OBJECT_UNLOCK (identity);
352 gst_identity_notify_last_message (identity);
353 }
355 if (identity->single_segment
356 && (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT)) {
357 if (trans->have_newsegment == FALSE) {
358 GstEvent *news;
359 GstFormat format;
361 gst_event_parse_new_segment (event, NULL, NULL, &format, NULL, NULL,
362 NULL);
364 /* This is the first newsegment, send out a (0, -1) newsegment */
365 news = gst_event_new_new_segment (TRUE, 1.0, format, 0, -1, 0);
367 gst_pad_event_default (trans->sinkpad, news);
368 }
369 }
371 /* Reset previous timestamp, duration and offsets on NEWSEGMENT
372 * to prevent false warnings when checking for perfect streams */
373 if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT) {
374 identity->prev_timestamp = identity->prev_duration = GST_CLOCK_TIME_NONE;
375 identity->prev_offset = identity->prev_offset_end = GST_BUFFER_OFFSET_NONE;
376 }
378 ret = parent_class->event (trans, event);
380 if (identity->single_segment
381 && (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT)) {
382 /* eat up segments */
383 ret = FALSE;
384 }
386 return ret;
387 }
389 static GstFlowReturn
390 gst_identity_prepare_output_buffer (GstBaseTransform * trans,
391 GstBuffer * in_buf, gint out_size, GstCaps * out_caps, GstBuffer ** out_buf)
392 {
393 GstIdentity *identity = GST_IDENTITY (trans);
395 /* only bother if we may have to alter metadata */
396 if (identity->datarate > 0 || identity->single_segment) {
397 if (gst_buffer_is_metadata_writable (in_buf))
398 *out_buf = gst_buffer_ref (in_buf);
399 else {
400 /* make even less writable */
401 gst_buffer_ref (in_buf);
402 /* extra ref is dropped going through the official process */
403 *out_buf = gst_buffer_make_metadata_writable (in_buf);
404 }
405 } else
406 *out_buf = gst_buffer_ref (in_buf);
408 return GST_FLOW_OK;
409 }
411 static void
412 gst_identity_check_perfect (GstIdentity * identity, GstBuffer * buf)
413 {
414 GstClockTime timestamp;
416 timestamp = GST_BUFFER_TIMESTAMP (buf);
418 /* see if we need to do perfect stream checking */
419 /* invalid timestamp drops us out of check. FIXME: maybe warn ? */
420 if (timestamp != GST_CLOCK_TIME_NONE) {
421 /* check if we had a previous buffer to compare to */
422 if (identity->prev_timestamp != GST_CLOCK_TIME_NONE &&
423 identity->prev_duration != GST_CLOCK_TIME_NONE) {
424 guint64 offset, t_expected;
425 gint64 dt;
427 t_expected = identity->prev_timestamp + identity->prev_duration;
428 dt = timestamp - t_expected;
429 if (dt != 0) {
430 GST_WARNING_OBJECT (identity,
431 "Buffer not time-contiguous with previous one: " "prev ts %"
432 GST_TIME_FORMAT ", prev dur %" GST_TIME_FORMAT ", new ts %"
433 GST_TIME_FORMAT " (expected ts %" GST_TIME_FORMAT ", delta=%c%"
434 GST_TIME_FORMAT ")", GST_TIME_ARGS (identity->prev_timestamp),
435 GST_TIME_ARGS (identity->prev_duration), GST_TIME_ARGS (timestamp),
436 GST_TIME_ARGS (t_expected), (dt < 0) ? '-' : '+',
437 GST_TIME_ARGS ((dt < 0) ? (GstClockTime) (-dt) : dt));
438 }
440 offset = GST_BUFFER_OFFSET (buf);
441 if (identity->prev_offset_end != offset &&
442 identity->prev_offset_end != GST_BUFFER_OFFSET_NONE &&
443 offset != GST_BUFFER_OFFSET_NONE) {
444 GST_WARNING_OBJECT (identity,
445 "Buffer not data-contiguous with previous one: "
446 "prev offset_end %" G_GINT64_FORMAT ", new offset %"
447 G_GINT64_FORMAT, identity->prev_offset_end, offset);
448 }
449 } else {
450 GST_DEBUG_OBJECT (identity, "can't check time-contiguity, no timestamp "
451 "and/or duration were set on previous buffer");
452 }
453 }
454 }
456 static void
457 gst_identity_check_imperfect_timestamp (GstIdentity * identity, GstBuffer * buf)
458 {
459 GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buf);
461 /* invalid timestamp drops us out of check. FIXME: maybe warn ? */
462 if (timestamp != GST_CLOCK_TIME_NONE) {
463 /* check if we had a previous buffer to compare to */
464 if (identity->prev_timestamp != GST_CLOCK_TIME_NONE &&
465 identity->prev_duration != GST_CLOCK_TIME_NONE) {
466 GstClockTime t_expected;
467 GstClockTimeDiff dt;
469 t_expected = identity->prev_timestamp + identity->prev_duration;
470 dt = GST_CLOCK_DIFF (t_expected, timestamp);
471 if (dt != 0) {
472 /*
473 * "imperfect-timestamp" bus message:
474 * @identity: the identity instance
475 * @prev-timestamp: the previous buffer timestamp
476 * @prev-duration: the previous buffer duration
477 * @prev-offset: the previous buffer offset
478 * @prev-offset-end: the previous buffer offset end
479 * @cur-timestamp: the current buffer timestamp
480 * @cur-duration: the current buffer duration
481 * @cur-offset: the current buffer offset
482 * @cur-offset-end: the current buffer offset end
483 *
484 * This bus message gets emitted if the check-imperfect-timestamp
485 * property is set and there is a gap in time between the
486 * last buffer and the newly received buffer.
487 */
488 gst_element_post_message (GST_ELEMENT (identity),
489 gst_message_new_element (GST_OBJECT (identity),
490 gst_structure_new ("imperfect-timestamp",
491 "prev-timestamp", G_TYPE_UINT64,
492 identity->prev_timestamp, "prev-duration", G_TYPE_UINT64,
493 identity->prev_duration, "prev-offset", G_TYPE_UINT64,
494 identity->prev_offset, "prev-offset-end", G_TYPE_UINT64,
495 identity->prev_offset_end, "cur-timestamp", G_TYPE_UINT64,
496 timestamp, "cur-duration", G_TYPE_UINT64,
497 GST_BUFFER_DURATION (buf), "cur-offset", G_TYPE_UINT64,
498 GST_BUFFER_OFFSET (buf), "cur-offset-end", G_TYPE_UINT64,
499 GST_BUFFER_OFFSET_END (buf), NULL)));
500 }
501 } else {
502 GST_DEBUG_OBJECT (identity, "can't check data-contiguity, no "
503 "offset_end was set on previous buffer");
504 }
505 }
506 }
508 static void
509 gst_identity_check_imperfect_offset (GstIdentity * identity, GstBuffer * buf)
510 {
511 guint64 offset;
513 offset = GST_BUFFER_OFFSET (buf);
515 if (identity->prev_offset_end != offset &&
516 identity->prev_offset_end != GST_BUFFER_OFFSET_NONE &&
517 offset != GST_BUFFER_OFFSET_NONE) {
518 /*
519 * "imperfect-offset" bus message:
520 * @identity: the identity instance
521 * @prev-timestamp: the previous buffer timestamp
522 * @prev-duration: the previous buffer duration
523 * @prev-offset: the previous buffer offset
524 * @prev-offset-end: the previous buffer offset end
525 * @cur-timestamp: the current buffer timestamp
526 * @cur-duration: the current buffer duration
527 * @cur-offset: the current buffer offset
528 * @cur-offset-end: the current buffer offset end
529 *
530 * This bus message gets emitted if the check-imperfect-offset
531 * property is set and there is a gap in offsets between the
532 * last buffer and the newly received buffer.
533 */
534 gst_element_post_message (GST_ELEMENT (identity),
535 gst_message_new_element (GST_OBJECT (identity),
536 gst_structure_new ("imperfect-offset", "prev-timestamp",
537 G_TYPE_UINT64, identity->prev_timestamp, "prev-duration",
538 G_TYPE_UINT64, identity->prev_duration, "prev-offset",
539 G_TYPE_UINT64, identity->prev_offset, "prev-offset-end",
540 G_TYPE_UINT64, identity->prev_offset_end, "cur-timestamp",
541 G_TYPE_UINT64, GST_BUFFER_TIMESTAMP (buf), "cur-duration",
542 G_TYPE_UINT64, GST_BUFFER_DURATION (buf), "cur-offset",
543 G_TYPE_UINT64, GST_BUFFER_OFFSET (buf), "cur-offset-end",
544 G_TYPE_UINT64, GST_BUFFER_OFFSET_END (buf), NULL)));
545 } else {
546 GST_DEBUG_OBJECT (identity, "can't check offset contiguity, no offset "
547 "and/or offset_end were set on previous buffer");
548 }
549 }
551 static const gchar *
552 print_pretty_time (gchar * ts_str, gsize ts_str_len, GstClockTime ts)
553 {
554 if (ts == GST_CLOCK_TIME_NONE)
555 return "none";
557 g_snprintf (ts_str, ts_str_len, "%" GST_TIME_FORMAT, GST_TIME_ARGS (ts));
558 return ts_str;
559 }
561 static void
562 gst_identity_update_last_message_for_buffer (GstIdentity * identity,
563 const gchar * action, GstBuffer * buf)
564 {
565 gchar ts_str[64], dur_str[64];
567 GST_OBJECT_LOCK (identity);
569 g_free (identity->last_message);
570 identity->last_message = g_strdup_printf ("%s ******* (%s:%s)i "
571 "(%u bytes, timestamp: %s, duration: %s, offset: %" G_GINT64_FORMAT ", "
572 "offset_end: % " G_GINT64_FORMAT ", flags: %d) %p", action,
573 GST_DEBUG_PAD_NAME (GST_BASE_TRANSFORM_CAST (identity)->sinkpad),
574 GST_BUFFER_SIZE (buf),
575 print_pretty_time (ts_str, sizeof (ts_str), GST_BUFFER_TIMESTAMP (buf)),
576 print_pretty_time (dur_str, sizeof (dur_str), GST_BUFFER_DURATION (buf)),
577 GST_BUFFER_OFFSET (buf), GST_BUFFER_OFFSET_END (buf),
578 GST_BUFFER_FLAGS (buf), buf);
580 GST_OBJECT_UNLOCK (identity);
582 gst_identity_notify_last_message (identity);
583 }
585 static GstFlowReturn
586 gst_identity_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
587 {
588 GstFlowReturn ret = GST_FLOW_OK;
589 GstIdentity *identity = GST_IDENTITY (trans);
590 GstClockTime runtimestamp = G_GINT64_CONSTANT (0);
592 if (identity->check_perfect)
593 gst_identity_check_perfect (identity, buf);
594 if (identity->check_imperfect_timestamp)
595 gst_identity_check_imperfect_timestamp (identity, buf);
596 if (identity->check_imperfect_offset)
597 gst_identity_check_imperfect_offset (identity, buf);
599 /* update prev values */
600 identity->prev_timestamp = GST_BUFFER_TIMESTAMP (buf);
601 identity->prev_duration = GST_BUFFER_DURATION (buf);
602 identity->prev_offset_end = GST_BUFFER_OFFSET_END (buf);
603 identity->prev_offset = GST_BUFFER_OFFSET (buf);
605 if (identity->error_after >= 0) {
606 identity->error_after--;
607 if (identity->error_after == 0) {
608 GST_ELEMENT_ERROR (identity, CORE, FAILED,
609 (_("Failed after iterations as requested.")), (NULL));
610 return GST_FLOW_ERROR;
611 }
612 }
614 if (identity->drop_probability > 0.0) {
615 if ((gfloat) (1.0 * rand () / (RAND_MAX)) < identity->drop_probability) {
616 if (!identity->silent) {
617 gst_identity_update_last_message_for_buffer (identity, "dropping", buf);
618 }
619 /* return DROPPED to basetransform. */
620 return GST_BASE_TRANSFORM_FLOW_DROPPED;
621 }
622 }
624 if (identity->dump) {
625 gst_util_dump_mem (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
626 }
628 if (!identity->silent) {
629 gst_identity_update_last_message_for_buffer (identity, "chain", buf);
630 }
632 if (identity->datarate > 0) {
633 GstClockTime time = gst_util_uint64_scale_int (identity->offset,
634 GST_SECOND, identity->datarate);
636 GST_BUFFER_TIMESTAMP (buf) = time;
637 GST_BUFFER_DURATION (buf) =
638 GST_BUFFER_SIZE (buf) * GST_SECOND / identity->datarate;
639 }
641 if (identity->signal_handoffs)
642 g_signal_emit (identity, gst_identity_signals[SIGNAL_HANDOFF], 0, buf);
644 if (trans->segment.format == GST_FORMAT_TIME)
645 runtimestamp = gst_segment_to_running_time (&trans->segment,
646 GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buf));
648 if ((identity->sync) && (trans->segment.format == GST_FORMAT_TIME)) {
649 GstClock *clock;
651 GST_OBJECT_LOCK (identity);
652 if ((clock = GST_ELEMENT (identity)->clock)) {
653 GstClockReturn cret;
654 GstClockTime timestamp;
656 timestamp = runtimestamp + GST_ELEMENT (identity)->base_time;
658 /* save id if we need to unlock */
659 /* FIXME: actually unlock this somewhere in the state changes */
660 identity->clock_id = gst_clock_new_single_shot_id (clock, timestamp);
661 GST_OBJECT_UNLOCK (identity);
663 cret = gst_clock_id_wait (identity->clock_id, NULL);
665 GST_OBJECT_LOCK (identity);
666 if (identity->clock_id) {
667 gst_clock_id_unref (identity->clock_id);
668 identity->clock_id = NULL;
669 }
670 if (cret == GST_CLOCK_UNSCHEDULED)
671 ret = GST_FLOW_UNEXPECTED;
672 }
673 GST_OBJECT_UNLOCK (identity);
674 }
676 identity->offset += GST_BUFFER_SIZE (buf);
678 if (identity->sleep_time && ret == GST_FLOW_OK)
679 g_usleep (identity->sleep_time);
681 if (identity->single_segment && (trans->segment.format == GST_FORMAT_TIME)
682 && (ret == GST_FLOW_OK)) {
683 GST_BUFFER_TIMESTAMP (buf) = runtimestamp;
684 GST_BUFFER_OFFSET (buf) = GST_CLOCK_TIME_NONE;
685 GST_BUFFER_OFFSET_END (buf) = GST_CLOCK_TIME_NONE;
686 }
688 return ret;
689 }
691 static void
692 gst_identity_set_property (GObject * object, guint prop_id,
693 const GValue * value, GParamSpec * pspec)
694 {
695 GstIdentity *identity;
697 identity = GST_IDENTITY (object);
699 switch (prop_id) {
700 case PROP_SLEEP_TIME:
701 identity->sleep_time = g_value_get_uint (value);
702 break;
703 case PROP_SILENT:
704 identity->silent = g_value_get_boolean (value);
705 break;
706 case PROP_SINGLE_SEGMENT:
707 identity->single_segment = g_value_get_boolean (value);
708 break;
709 case PROP_DUMP:
710 identity->dump = g_value_get_boolean (value);
711 break;
712 case PROP_ERROR_AFTER:
713 identity->error_after = g_value_get_int (value);
714 break;
715 case PROP_DROP_PROBABILITY:
716 identity->drop_probability = g_value_get_float (value);
717 break;
718 case PROP_DATARATE:
719 identity->datarate = g_value_get_int (value);
720 break;
721 case PROP_SYNC:
722 identity->sync = g_value_get_boolean (value);
723 break;
724 case PROP_CHECK_PERFECT:
725 identity->check_perfect = g_value_get_boolean (value);
726 break;
727 case PROP_CHECK_IMPERFECT_TIMESTAMP:
728 identity->check_imperfect_timestamp = g_value_get_boolean (value);
729 break;
730 case PROP_CHECK_IMPERFECT_OFFSET:
731 identity->check_imperfect_offset = g_value_get_boolean (value);
732 break;
733 case PROP_SIGNAL_HANDOFFS:
734 identity->signal_handoffs = g_value_get_boolean (value);
735 break;
736 default:
737 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
738 break;
739 }
740 }
742 static void
743 gst_identity_get_property (GObject * object, guint prop_id, GValue * value,
744 GParamSpec * pspec)
745 {
746 GstIdentity *identity;
748 identity = GST_IDENTITY (object);
750 switch (prop_id) {
751 case PROP_SLEEP_TIME:
752 g_value_set_uint (value, identity->sleep_time);
753 break;
754 case PROP_ERROR_AFTER:
755 g_value_set_int (value, identity->error_after);
756 break;
757 case PROP_DROP_PROBABILITY:
758 g_value_set_float (value, identity->drop_probability);
759 break;
760 case PROP_DATARATE:
761 g_value_set_int (value, identity->datarate);
762 break;
763 case PROP_SILENT:
764 g_value_set_boolean (value, identity->silent);
765 break;
766 case PROP_SINGLE_SEGMENT:
767 g_value_set_boolean (value, identity->single_segment);
768 break;
769 case PROP_DUMP:
770 g_value_set_boolean (value, identity->dump);
771 break;
772 case PROP_LAST_MESSAGE:
773 GST_OBJECT_LOCK (identity);
774 g_value_set_string (value, identity->last_message);
775 GST_OBJECT_UNLOCK (identity);
776 break;
777 case PROP_SYNC:
778 g_value_set_boolean (value, identity->sync);
779 break;
780 case PROP_CHECK_PERFECT:
781 g_value_set_boolean (value, identity->check_perfect);
782 break;
783 case PROP_CHECK_IMPERFECT_TIMESTAMP:
784 g_value_set_boolean (value, identity->check_imperfect_timestamp);
785 break;
786 case PROP_CHECK_IMPERFECT_OFFSET:
787 g_value_set_boolean (value, identity->check_imperfect_offset);
788 break;
789 case PROP_SIGNAL_HANDOFFS:
790 g_value_set_boolean (value, identity->signal_handoffs);
791 break;
792 default:
793 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
794 break;
795 }
796 }
798 static gboolean
799 gst_identity_start (GstBaseTransform * trans)
800 {
801 GstIdentity *identity;
803 identity = GST_IDENTITY (trans);
805 identity->offset = 0;
806 identity->prev_timestamp = GST_CLOCK_TIME_NONE;
807 identity->prev_duration = GST_CLOCK_TIME_NONE;
808 identity->prev_offset_end = GST_BUFFER_OFFSET_NONE;
809 identity->prev_offset = GST_BUFFER_OFFSET_NONE;
811 return TRUE;
812 }
814 static gboolean
815 gst_identity_stop (GstBaseTransform * trans)
816 {
817 GstIdentity *identity;
819 identity = GST_IDENTITY (trans);
821 GST_OBJECT_LOCK (identity);
822 g_free (identity->last_message);
823 identity->last_message = NULL;
824 GST_OBJECT_UNLOCK (identity);
826 return TRUE;
827 }