1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 /**
21 * SECTION:element-videorate
22 * @title: videorate
23 *
24 * This element takes an incoming stream of timestamped video frames.
25 * It will produce a perfect stream that matches the source pad's framerate.
26 *
27 * The correction is performed by dropping and duplicating frames, no fancy
28 * algorithm is used to interpolate frames (yet).
29 *
30 * By default the element will simply negotiate the same framerate on its
31 * source and sink pad.
32 *
33 * This operation is useful to link to elements that require a perfect stream.
34 * Typical examples are formats that do not store timestamps for video frames,
35 * but only store a framerate, like Ogg and AVI.
36 *
37 * A conversion to a specific framerate can be forced by using filtered caps on
38 * the source pad.
39 *
40 * The properties #GstVideoRate:in, #GstVideoRate:out, #GstVideoRate:duplicate
41 * and #GstVideoRate:drop can be read to obtain information about number of
42 * input frames, output frames, dropped frames (i.e. the number of unused input
43 * frames) and duplicated frames (i.e. the number of times an input frame was
44 * duplicated, beside being used normally).
45 *
46 * An input stream that needs no adjustments will thus never have dropped or
47 * duplicated frames.
48 *
49 * When the #GstVideoRate:silent property is set to FALSE, a GObject property
50 * notification will be emitted whenever one of the #GstVideoRate:duplicate or
51 * #GstVideoRate:drop values changes.
52 * This can potentially cause performance degradation.
53 * Note that property notification will happen from the streaming thread, so
54 * applications should be prepared for this.
55 *
56 * The property #GstVideoRate:rate allows the modification of video speed by a
57 * certain factor. It must not be confused with framerate. Think of rate as
58 * speed and framerate as flow.
59 *
60 * ## Example pipelines
61 * |[
62 * gst-launch-1.0 -v uridecodebin uri=file:///path/to/video.ogg ! videoconvert ! videoscale ! videorate ! video/x-raw,framerate=15/1 ! autovideosink
63 * ]|
64 * Decode a video file and adjust the framerate to 15 fps before playing.
65 * To create a test Ogg/Theora file refer to the documentation of theoraenc.
66 * |[
67 * gst-launch-1.0 -v v4l2src ! videorate ! video/x-raw,framerate=25/2 ! theoraenc ! oggmux ! filesink location=recording.ogg
68 * ]|
69 * Capture video from a V4L device, and adjust the stream to 12.5 fps before
70 * encoding to Ogg/Theora.
71 * |[
72 * gst-launch-1.0 -v uridecodebin uri=file:///path/to/video.ogg ! videoconvert ! videoscale ! videorate ! video/x-raw,framerate=1/5 ! jpegenc ! multifilesink location=snapshot-%05d.jpg
73 * ]|
74 * Decode a video file and save a snapshot every 5 seconds as consecutively numbered jpeg file.
75 *
76 */
77
78 #ifdef HAVE_CONFIG_H
79 #include "config.h"
80 #endif
81
82 #include "gstvideorate.h"
83 #include <gst/video/video.h>
84
85 GST_DEBUG_CATEGORY_STATIC (video_rate_debug);
86 #define GST_CAT_DEFAULT video_rate_debug
87
88 /* GstVideoRate signals and args */
89 enum
90 {
91 /* FILL ME */
92 LAST_SIGNAL
93 };
94
95 #define DEFAULT_SILENT TRUE
96 #define DEFAULT_NEW_PREF 1.0
97 #define DEFAULT_SKIP_TO_FIRST FALSE
98 #define DEFAULT_DROP_ONLY FALSE
99 #define DEFAULT_AVERAGE_PERIOD 0
100 #define DEFAULT_MAX_RATE G_MAXINT
101 #define DEFAULT_RATE 1.0
102 #define DEFAULT_MAX_DUPLICATION_TIME 0
103
104 enum
105 {
106 PROP_0,
107 PROP_IN,
108 PROP_OUT,
109 PROP_DUP,
110 PROP_DROP,
111 PROP_SILENT,
112 PROP_NEW_PREF,
113 PROP_SKIP_TO_FIRST,
114 PROP_DROP_ONLY,
115 PROP_AVERAGE_PERIOD,
116 PROP_MAX_RATE,
117 PROP_RATE,
118 PROP_MAX_DUPLICATION_TIME
119 };
120
121 static GstStaticPadTemplate gst_video_rate_src_template =
122 GST_STATIC_PAD_TEMPLATE ("src",
123 GST_PAD_SRC,
124 GST_PAD_ALWAYS,
125 GST_STATIC_CAPS ("video/x-raw(ANY);" "video/x-bayer(ANY);"
126 "image/jpeg(ANY);" "image/png(ANY)")
127 );
128
129 static GstStaticPadTemplate gst_video_rate_sink_template =
130 GST_STATIC_PAD_TEMPLATE ("sink",
131 GST_PAD_SINK,
132 GST_PAD_ALWAYS,
133 GST_STATIC_CAPS ("video/x-raw(ANY);" "video/x-bayer(ANY);"
134 "image/jpeg(ANY);" "image/png(ANY)")
135 );
136
137 static void gst_video_rate_swap_prev (GstVideoRate * videorate,
138 GstBuffer * buffer, gint64 time);
139 static gboolean gst_video_rate_sink_event (GstBaseTransform * trans,
140 GstEvent * event);
141 static gboolean gst_video_rate_src_event (GstBaseTransform * trans,
142 GstEvent * event);
143 static gboolean gst_video_rate_query (GstBaseTransform * trans,
144 GstPadDirection direction, GstQuery * query);
145
146 static gboolean gst_video_rate_setcaps (GstBaseTransform * trans,
147 GstCaps * in_caps, GstCaps * out_caps);
148
149 static GstCaps *gst_video_rate_transform_caps (GstBaseTransform * trans,
150 GstPadDirection direction, GstCaps * caps, GstCaps * filter);
151
152 static GstCaps *gst_video_rate_fixate_caps (GstBaseTransform * trans,
153 GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
154
155 static GstFlowReturn gst_video_rate_transform_ip (GstBaseTransform * trans,
156 GstBuffer * buf);
157
158 static gboolean gst_video_rate_propose_allocation (GstBaseTransform * trans,
159 GstQuery * decide_query, GstQuery * query);
160
161 static gboolean gst_video_rate_start (GstBaseTransform * trans);
162 static gboolean gst_video_rate_stop (GstBaseTransform * trans);
163
164
165 static void gst_video_rate_set_property (GObject * object,
166 guint prop_id, const GValue * value, GParamSpec * pspec);
167 static void gst_video_rate_get_property (GObject * object,
168 guint prop_id, GValue * value, GParamSpec * pspec);
169
170 static GParamSpec *pspec_drop = NULL;
171 static GParamSpec *pspec_duplicate = NULL;
172
173 #define gst_video_rate_parent_class parent_class
174 G_DEFINE_TYPE (GstVideoRate, gst_video_rate, GST_TYPE_BASE_TRANSFORM);
175
176 static void
gst_video_rate_class_init(GstVideoRateClass * klass)177 gst_video_rate_class_init (GstVideoRateClass * klass)
178 {
179 GObjectClass *object_class = G_OBJECT_CLASS (klass);
180 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
181 GstBaseTransformClass *base_class = GST_BASE_TRANSFORM_CLASS (klass);
182
183 object_class->set_property = gst_video_rate_set_property;
184 object_class->get_property = gst_video_rate_get_property;
185
186 base_class->set_caps = GST_DEBUG_FUNCPTR (gst_video_rate_setcaps);
187 base_class->transform_caps =
188 GST_DEBUG_FUNCPTR (gst_video_rate_transform_caps);
189 base_class->transform_ip = GST_DEBUG_FUNCPTR (gst_video_rate_transform_ip);
190 base_class->sink_event = GST_DEBUG_FUNCPTR (gst_video_rate_sink_event);
191 base_class->src_event = GST_DEBUG_FUNCPTR (gst_video_rate_src_event);
192 base_class->start = GST_DEBUG_FUNCPTR (gst_video_rate_start);
193 base_class->stop = GST_DEBUG_FUNCPTR (gst_video_rate_stop);
194 base_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_video_rate_fixate_caps);
195 base_class->query = GST_DEBUG_FUNCPTR (gst_video_rate_query);
196 base_class->propose_allocation =
197 GST_DEBUG_FUNCPTR (gst_video_rate_propose_allocation);
198
199 g_object_class_install_property (object_class, PROP_IN,
200 g_param_spec_uint64 ("in", "In",
201 "Number of input frames", 0, G_MAXUINT64, 0,
202 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
203 g_object_class_install_property (object_class, PROP_OUT,
204 g_param_spec_uint64 ("out", "Out", "Number of output frames", 0,
205 G_MAXUINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
206 pspec_duplicate = g_param_spec_uint64 ("duplicate", "Duplicate",
207 "Number of duplicated frames", 0, G_MAXUINT64, 0,
208 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
209 g_object_class_install_property (object_class, PROP_DUP, pspec_duplicate);
210 pspec_drop = g_param_spec_uint64 ("drop", "Drop", "Number of dropped frames",
211 0, G_MAXUINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
212 g_object_class_install_property (object_class, PROP_DROP, pspec_drop);
213 g_object_class_install_property (object_class, PROP_SILENT,
214 g_param_spec_boolean ("silent", "silent",
215 "Don't emit notify for dropped and duplicated frames", DEFAULT_SILENT,
216 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
217 g_object_class_install_property (object_class, PROP_NEW_PREF,
218 g_param_spec_double ("new-pref", "New Pref",
219 "Value indicating how much to prefer new frames (unused)", 0.0, 1.0,
220 DEFAULT_NEW_PREF, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
221
222 /**
223 * GstVideoRate:skip-to-first:
224 *
225 * Don't produce buffers before the first one we receive.
226 */
227 g_object_class_install_property (object_class, PROP_SKIP_TO_FIRST,
228 g_param_spec_boolean ("skip-to-first", "Skip to first buffer",
229 "Don't produce buffers before the first one we receive",
230 DEFAULT_SKIP_TO_FIRST, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
231
232 /**
233 * GstVideoRate:drop-only:
234 *
235 * Only drop frames, no duplicates are produced.
236 */
237 g_object_class_install_property (object_class, PROP_DROP_ONLY,
238 g_param_spec_boolean ("drop-only", "Only Drop",
239 "Only drop frames, no duplicates are produced",
240 DEFAULT_DROP_ONLY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
241
242 /**
243 * GstVideoRate:average-period:
244 *
245 * Arrange for maximum framerate by dropping frames beyond a certain framerate,
246 * where the framerate is calculated using a moving average over the
247 * configured.
248 */
249 g_object_class_install_property (object_class, PROP_AVERAGE_PERIOD,
250 g_param_spec_uint64 ("average-period", "Period over which to average",
251 "Period over which to average the framerate (in ns) (0 = disabled)",
252 0, G_MAXINT64, DEFAULT_AVERAGE_PERIOD,
253 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
254
255 /**
256 * GstVideoRate:max-rate:
257 *
258 * maximum framerate to pass through
259 */
260 g_object_class_install_property (object_class, PROP_MAX_RATE,
261 g_param_spec_int ("max-rate", "maximum framerate",
262 "Maximum framerate allowed to pass through "
263 "(in frames per second, implies drop-only)",
264 1, G_MAXINT, DEFAULT_MAX_RATE,
265 G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
266
267 /**
268 * GstVideoRate:rate:
269 *
270 * Factor of speed for frame displaying
271 *
272 * Since: 1.12
273 */
274 g_object_class_install_property (object_class, PROP_RATE,
275 g_param_spec_double ("rate", "Rate",
276 "Factor of speed for frame displaying", 0.0, G_MAXDOUBLE,
277 DEFAULT_RATE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
278 GST_PARAM_MUTABLE_READY));
279
280 /**
281 * GstVideoRate:max-duplication-time:
282 *
283 * Duplicate frames only if the gap between two consecutive frames does not
284 * exceed this duration.
285 *
286 * Since: 1.16
287 */
288 g_object_class_install_property (object_class, PROP_MAX_DUPLICATION_TIME,
289 g_param_spec_uint64 ("max-duplication-time",
290 "Maximum time to duplicate a frame",
291 "Do not duplicate frames if the gap exceeds this period "
292 "(in ns) (0 = disabled)",
293 0, G_MAXUINT64, DEFAULT_MAX_DUPLICATION_TIME,
294 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
295
296 gst_element_class_set_static_metadata (element_class,
297 "Video rate adjuster", "Filter/Effect/Video",
298 "Drops/duplicates/adjusts timestamps on video frames to make a perfect stream",
299 "Wim Taymans <wim@fluendo.com>");
300
301 gst_element_class_add_static_pad_template (element_class,
302 &gst_video_rate_sink_template);
303 gst_element_class_add_static_pad_template (element_class,
304 &gst_video_rate_src_template);
305 }
306
307 static void
gst_value_fraction_get_extremes(const GValue * v,gint * min_num,gint * min_denom,gint * max_num,gint * max_denom)308 gst_value_fraction_get_extremes (const GValue * v,
309 gint * min_num, gint * min_denom, gint * max_num, gint * max_denom)
310 {
311 if (GST_VALUE_HOLDS_FRACTION (v)) {
312 *min_num = *max_num = gst_value_get_fraction_numerator (v);
313 *min_denom = *max_denom = gst_value_get_fraction_denominator (v);
314 } else if (GST_VALUE_HOLDS_FRACTION_RANGE (v)) {
315 const GValue *min, *max;
316
317 min = gst_value_get_fraction_range_min (v);
318 *min_num = gst_value_get_fraction_numerator (min);
319 *min_denom = gst_value_get_fraction_denominator (min);
320
321 max = gst_value_get_fraction_range_max (v);
322 *max_num = gst_value_get_fraction_numerator (max);
323 *max_denom = gst_value_get_fraction_denominator (max);
324 } else if (GST_VALUE_HOLDS_LIST (v)) {
325 gint min_n = G_MAXINT, min_d = 1, max_n = 0, max_d = 1;
326 int i, n;
327
328 *min_num = G_MAXINT;
329 *min_denom = 1;
330 *max_num = 0;
331 *max_denom = 1;
332
333 n = gst_value_list_get_size (v);
334
335 g_assert (n > 0);
336
337 for (i = 0; i < n; i++) {
338 const GValue *t = gst_value_list_get_value (v, i);
339
340 gst_value_fraction_get_extremes (t, &min_n, &min_d, &max_n, &max_d);
341 if (gst_util_fraction_compare (min_n, min_d, *min_num, *min_denom) < 0) {
342 *min_num = min_n;
343 *min_denom = min_d;
344 }
345
346 if (gst_util_fraction_compare (max_n, max_d, *max_num, *max_denom) > 0) {
347 *max_num = max_n;
348 *max_denom = max_d;
349 }
350 }
351 } else {
352 g_warning ("Unknown type for framerate");
353 *min_num = 0;
354 *min_denom = 1;
355 *max_num = G_MAXINT;
356 *max_denom = 1;
357 }
358 }
359
360 /* Clamp the framerate in a caps structure to be a smaller range then
361 * [1...max_rate], otherwise return false */
362 static gboolean
gst_video_max_rate_clamp_structure(GstStructure * s,gint maxrate,gint * min_num,gint * min_denom,gint * max_num,gint * max_denom)363 gst_video_max_rate_clamp_structure (GstStructure * s, gint maxrate,
364 gint * min_num, gint * min_denom, gint * max_num, gint * max_denom)
365 {
366 gboolean ret = FALSE;
367
368 if (!gst_structure_has_field (s, "framerate")) {
369 /* No framerate field implies any framerate, clamping would result in
370 * [1..max_rate] so not a real subset */
371 goto out;
372 } else {
373 const GValue *v;
374 GValue intersection = { 0, };
375 GValue clamp = { 0, };
376 gint tmp_num, tmp_denom;
377
378 g_value_init (&clamp, GST_TYPE_FRACTION_RANGE);
379 gst_value_set_fraction_range_full (&clamp, 0, 1, maxrate, 1);
380
381 v = gst_structure_get_value (s, "framerate");
382 ret = gst_value_intersect (&intersection, v, &clamp);
383 g_value_unset (&clamp);
384
385 if (!ret)
386 goto out;
387
388 gst_value_fraction_get_extremes (&intersection,
389 min_num, min_denom, max_num, max_denom);
390
391 gst_value_fraction_get_extremes (v,
392 &tmp_num, &tmp_denom, max_num, max_denom);
393
394 if (gst_util_fraction_compare (*max_num, *max_denom, maxrate, 1) > 0) {
395 *max_num = maxrate;
396 *max_denom = 1;
397 }
398
399 gst_structure_take_value (s, "framerate", &intersection);
400 }
401
402 out:
403 return ret;
404 }
405
406 static GstCaps *
gst_video_rate_transform_caps(GstBaseTransform * trans,GstPadDirection direction,GstCaps * caps,GstCaps * filter)407 gst_video_rate_transform_caps (GstBaseTransform * trans,
408 GstPadDirection direction, GstCaps * caps, GstCaps * filter)
409 {
410 GstVideoRate *videorate = GST_VIDEO_RATE (trans);
411 GstCaps *ret;
412 GstStructure *s, *s1, *s2, *s3 = NULL;
413 int maxrate = g_atomic_int_get (&videorate->max_rate);
414 gint i;
415
416 ret = gst_caps_new_empty ();
417
418 for (i = 0; i < gst_caps_get_size (caps); i++) {
419 s = gst_caps_get_structure (caps, i);
420
421 s1 = gst_structure_copy (s);
422
423 if (videorate->updating_caps && direction == GST_PAD_SINK) {
424 GST_INFO_OBJECT (trans,
425 "Only updating caps %" GST_PTR_FORMAT " with framerate" " %d/%d",
426 caps, videorate->to_rate_numerator, videorate->to_rate_denominator);
427
428 gst_structure_set (s1, "framerate", GST_TYPE_FRACTION,
429 videorate->to_rate_numerator, videorate->to_rate_denominator, NULL);
430 ret = gst_caps_merge_structure (ret, s1);
431
432 continue;
433 }
434
435 s2 = gst_structure_copy (s);
436 s3 = NULL;
437
438 if (videorate->drop_only) {
439 gint min_num = 0, min_denom = 1;
440 gint max_num = G_MAXINT, max_denom = 1;
441
442 /* Clamp the caps to our maximum rate as the first caps if possible */
443 if (!gst_video_max_rate_clamp_structure (s1, maxrate,
444 &min_num, &min_denom, &max_num, &max_denom)) {
445 min_num = 0;
446 min_denom = 1;
447 max_num = maxrate;
448 max_denom = 1;
449
450 /* clamp wouldn't be a real subset of 1..maxrate, in this case the sink
451 * caps should become [1..maxrate], [1..maxint] and the src caps just
452 * [1..maxrate]. In case there was a caps incompatibility things will
453 * explode later as appropriate :)
454 *
455 * In case [X..maxrate] == [X..maxint], skip as we'll set it later
456 */
457 if (direction == GST_PAD_SRC && maxrate != G_MAXINT)
458 gst_structure_set (s1, "framerate", GST_TYPE_FRACTION_RANGE,
459 min_num, min_denom, maxrate, 1, NULL);
460 else {
461 gst_structure_free (s1);
462 s1 = NULL;
463 }
464 }
465
466 if (direction == GST_PAD_SRC) {
467 /* We can accept anything as long as it's at least the minimal framerate
468 * the the sink needs */
469 gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE,
470 min_num, min_denom, G_MAXINT, 1, NULL);
471
472 /* Also allow unknown framerate, if it isn't already */
473 if (min_num != 0 || min_denom != 1) {
474 s3 = gst_structure_copy (s);
475 gst_structure_set (s3, "framerate", GST_TYPE_FRACTION, 0, 1, NULL);
476 }
477 } else if (max_num != 0 || max_denom != 1) {
478 /* We can provide everything upto the maximum framerate at the src */
479 gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE,
480 0, 1, max_num, max_denom, NULL);
481 }
482 } else if (direction == GST_PAD_SINK) {
483 gint min_num = 0, min_denom = 1;
484 gint max_num = G_MAXINT, max_denom = 1;
485
486 if (!gst_video_max_rate_clamp_structure (s1, maxrate,
487 &min_num, &min_denom, &max_num, &max_denom)) {
488 gst_structure_free (s1);
489 s1 = NULL;
490 }
491 gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
492 maxrate, 1, NULL);
493 } else {
494 /* set the framerate as a range */
495 gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
496 G_MAXINT, 1, NULL);
497 }
498 if (s1 != NULL)
499 ret = gst_caps_merge_structure_full (ret, s1,
500 gst_caps_features_copy (gst_caps_get_features (caps, i)));
501 ret = gst_caps_merge_structure_full (ret, s2,
502 gst_caps_features_copy (gst_caps_get_features (caps, i)));
503 if (s3 != NULL)
504 ret = gst_caps_merge_structure_full (ret, s3,
505 gst_caps_features_copy (gst_caps_get_features (caps, i)));
506 }
507 if (filter) {
508 GstCaps *intersection;
509
510 intersection =
511 gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
512 gst_caps_unref (ret);
513 ret = intersection;
514 }
515 return ret;
516 }
517
518 static GstCaps *
gst_video_rate_fixate_caps(GstBaseTransform * trans,GstPadDirection direction,GstCaps * caps,GstCaps * othercaps)519 gst_video_rate_fixate_caps (GstBaseTransform * trans,
520 GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
521 {
522 GstStructure *s;
523 gint num, denom;
524 const GValue *par;
525
526 s = gst_caps_get_structure (caps, 0);
527 if (G_UNLIKELY (!gst_structure_get_fraction (s, "framerate", &num, &denom)))
528 return othercaps;
529
530 othercaps = gst_caps_truncate (othercaps);
531 othercaps = gst_caps_make_writable (othercaps);
532 s = gst_caps_get_structure (othercaps, 0);
533 gst_structure_fixate_field_nearest_fraction (s, "framerate", num, denom);
534
535 if ((par = gst_structure_get_value (s, "pixel-aspect-ratio")))
536 gst_structure_fixate_field_nearest_fraction (s, "pixel-aspect-ratio", 1, 1);
537
538 return othercaps;
539 }
540
541 static gboolean
gst_video_rate_setcaps(GstBaseTransform * trans,GstCaps * in_caps,GstCaps * out_caps)542 gst_video_rate_setcaps (GstBaseTransform * trans, GstCaps * in_caps,
543 GstCaps * out_caps)
544 {
545 GstVideoRate *videorate = GST_VIDEO_RATE (trans);
546 GstStructure *structure;
547 gboolean ret = TRUE;
548 gint rate_numerator, rate_denominator;
549
550 GST_DEBUG_OBJECT (trans, "setcaps called in: %" GST_PTR_FORMAT
551 " out: %" GST_PTR_FORMAT, in_caps, out_caps);
552
553 structure = gst_caps_get_structure (in_caps, 0);
554 if (!gst_structure_get_fraction (structure, "framerate",
555 &rate_numerator, &rate_denominator))
556 goto no_framerate;
557
558 videorate->from_rate_numerator = rate_numerator;
559 videorate->from_rate_denominator = rate_denominator;
560
561 structure = gst_caps_get_structure (out_caps, 0);
562 if (!gst_structure_get_fraction (structure, "framerate",
563 &rate_numerator, &rate_denominator))
564 goto no_framerate;
565
566 /* out_frame_count is scaled by the frame rate caps when calculating next_ts.
567 * when the frame rate caps change, we must update base_ts and reset
568 * out_frame_count */
569 if (videorate->to_rate_numerator) {
570 videorate->base_ts +=
571 gst_util_uint64_scale (videorate->out_frame_count +
572 (videorate->segment.rate < 0.0 ? 1 : 0),
573 videorate->to_rate_denominator * GST_SECOND,
574 videorate->to_rate_numerator);
575 }
576 videorate->out_frame_count = 0;
577 videorate->to_rate_numerator = rate_numerator;
578 videorate->to_rate_denominator = rate_denominator;
579
580 if (rate_numerator)
581 videorate->wanted_diff = gst_util_uint64_scale_int (GST_SECOND,
582 rate_denominator, rate_numerator);
583 else
584 videorate->wanted_diff = 0;
585
586 done:
587 /* After a setcaps, our caps may have changed. In that case, we can't use
588 * the old buffer, if there was one (it might have different dimensions) */
589 GST_DEBUG_OBJECT (videorate, "swapping old buffers");
590 gst_video_rate_swap_prev (videorate, NULL, GST_CLOCK_TIME_NONE);
591 videorate->last_ts = GST_CLOCK_TIME_NONE;
592 videorate->average = 0;
593
594 return ret;
595
596 no_framerate:
597 {
598 GST_DEBUG_OBJECT (videorate, "no framerate specified");
599 ret = FALSE;
600 goto done;
601 }
602 }
603
604 static void
gst_video_rate_reset(GstVideoRate * videorate)605 gst_video_rate_reset (GstVideoRate * videorate)
606 {
607 GST_DEBUG_OBJECT (videorate, "resetting internal variables");
608
609 videorate->in = 0;
610 videorate->out = 0;
611 videorate->base_ts = 0;
612 videorate->out_frame_count = 0;
613 videorate->drop = 0;
614 videorate->dup = 0;
615 videorate->next_ts = GST_CLOCK_TIME_NONE;
616 videorate->last_ts = GST_CLOCK_TIME_NONE;
617 videorate->discont = TRUE;
618 videorate->average = 0;
619 videorate->force_variable_rate = FALSE;
620 gst_video_rate_swap_prev (videorate, NULL, 0);
621
622 gst_segment_init (&videorate->segment, GST_FORMAT_TIME);
623 }
624
625 static void
gst_video_rate_init(GstVideoRate * videorate)626 gst_video_rate_init (GstVideoRate * videorate)
627 {
628 gst_video_rate_reset (videorate);
629 videorate->silent = DEFAULT_SILENT;
630 videorate->new_pref = DEFAULT_NEW_PREF;
631 videorate->drop_only = DEFAULT_DROP_ONLY;
632 videorate->average_period = DEFAULT_AVERAGE_PERIOD;
633 videorate->average_period_set = DEFAULT_AVERAGE_PERIOD;
634 videorate->max_rate = DEFAULT_MAX_RATE;
635 videorate->rate = DEFAULT_RATE;
636 videorate->max_duplication_time = DEFAULT_MAX_DUPLICATION_TIME;
637
638 videorate->from_rate_numerator = 0;
639 videorate->from_rate_denominator = 0;
640 videorate->to_rate_numerator = 0;
641 videorate->to_rate_denominator = 0;
642
643 gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (videorate), TRUE);
644 }
645
646 /* @outbuf: (transfer full) needs to be writable */
647 static GstFlowReturn
gst_video_rate_push_buffer(GstVideoRate * videorate,GstBuffer * outbuf,gboolean duplicate,GstClockTime next_intime)648 gst_video_rate_push_buffer (GstVideoRate * videorate, GstBuffer * outbuf,
649 gboolean duplicate, GstClockTime next_intime)
650 {
651 GstFlowReturn res;
652 GstClockTime push_ts;
653
654 GST_BUFFER_OFFSET (outbuf) = videorate->out;
655 GST_BUFFER_OFFSET_END (outbuf) = videorate->out + 1;
656
657 if (videorate->discont) {
658 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
659 videorate->discont = FALSE;
660 } else
661 GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DISCONT);
662
663 if (duplicate)
664 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
665 else
666 GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_GAP);
667
668 /* this is the timestamp we put on the buffer */
669 push_ts = videorate->next_ts;
670
671 videorate->out++;
672 videorate->out_frame_count++;
673 if (videorate->segment.rate < 0.0) {
674 if (videorate->to_rate_numerator) {
675 /* interpolate next expected timestamp in the segment */
676 videorate->next_ts =
677 videorate->segment.base + videorate->segment.stop -
678 videorate->base_ts -
679 gst_util_uint64_scale (videorate->out_frame_count + 1,
680 videorate->to_rate_denominator * GST_SECOND,
681 videorate->to_rate_numerator);
682
683 GST_BUFFER_DURATION (outbuf) = push_ts - videorate->next_ts;
684 } else if (next_intime != GST_CLOCK_TIME_NONE) {
685 videorate->next_ts = next_intime;
686 } else {
687 GST_FIXME_OBJECT (videorate, "No next intime for reverse playback");
688 }
689 } else {
690 if (videorate->to_rate_numerator) {
691 /* interpolate next expected timestamp in the segment */
692 videorate->next_ts =
693 videorate->segment.base + videorate->segment.start +
694 videorate->base_ts +
695 gst_util_uint64_scale (videorate->out_frame_count,
696 videorate->to_rate_denominator * GST_SECOND,
697 videorate->to_rate_numerator);
698 GST_BUFFER_DURATION (outbuf) = videorate->next_ts - push_ts;
699 } else if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_DURATION (outbuf))) {
700 videorate->next_ts =
701 GST_BUFFER_PTS (outbuf) + GST_BUFFER_DURATION (outbuf);
702 } else {
703 /* There must always be a valid duration on prevbuf if rate > 0,
704 * it is ensured in the transform_ip function */
705 GST_FIXME_OBJECT (videorate, "No buffer duration known");
706 }
707 }
708
709 /* We do not need to update time in VFR (variable frame rate) mode */
710 if (!videorate->drop_only) {
711 /* adapt for looping, bring back to time in current segment. */
712 GST_BUFFER_TIMESTAMP (outbuf) = push_ts - videorate->segment.base;
713 }
714
715 GST_LOG_OBJECT (videorate,
716 "old is best, dup, pushing buffer outgoing ts %" GST_TIME_FORMAT,
717 GST_TIME_ARGS (push_ts));
718
719 res = gst_pad_push (GST_BASE_TRANSFORM_SRC_PAD (videorate), outbuf);
720
721 return res;
722 }
723
724 /* flush the oldest buffer */
725 static GstFlowReturn
gst_video_rate_flush_prev(GstVideoRate * videorate,gboolean duplicate,GstClockTime next_intime)726 gst_video_rate_flush_prev (GstVideoRate * videorate, gboolean duplicate,
727 GstClockTime next_intime)
728 {
729 GstBuffer *outbuf;
730
731 if (!videorate->prevbuf)
732 goto eos_before_buffers;
733
734 outbuf = gst_buffer_ref (videorate->prevbuf);
735 /* make sure we can write to the metadata */
736 outbuf = gst_buffer_make_writable (outbuf);
737
738 return gst_video_rate_push_buffer (videorate, outbuf, duplicate, next_intime);
739
740 /* WARNINGS */
741 eos_before_buffers:
742 {
743 GST_INFO_OBJECT (videorate, "got EOS before any buffer was received");
744 return GST_FLOW_OK;
745 }
746 }
747
748 static void
gst_video_rate_swap_prev(GstVideoRate * videorate,GstBuffer * buffer,gint64 time)749 gst_video_rate_swap_prev (GstVideoRate * videorate, GstBuffer * buffer,
750 gint64 time)
751 {
752 GST_LOG_OBJECT (videorate, "swap_prev: storing buffer %p in prev", buffer);
753 if (videorate->prevbuf)
754 gst_buffer_unref (videorate->prevbuf);
755 videorate->prevbuf = buffer != NULL ? gst_buffer_ref (buffer) : NULL;
756 videorate->prev_ts = time;
757 }
758
759 static void
gst_video_rate_notify_drop(GstVideoRate * videorate)760 gst_video_rate_notify_drop (GstVideoRate * videorate)
761 {
762 g_object_notify_by_pspec ((GObject *) videorate, pspec_drop);
763 }
764
765 static void
gst_video_rate_notify_duplicate(GstVideoRate * videorate)766 gst_video_rate_notify_duplicate (GstVideoRate * videorate)
767 {
768 g_object_notify_by_pspec ((GObject *) videorate, pspec_duplicate);
769 }
770
771 #define MAGIC_LIMIT 25
772 static gboolean
gst_video_rate_sink_event(GstBaseTransform * trans,GstEvent * event)773 gst_video_rate_sink_event (GstBaseTransform * trans, GstEvent * event)
774 {
775 GstVideoRate *videorate;
776
777 videorate = GST_VIDEO_RATE (trans);
778
779 switch (GST_EVENT_TYPE (event)) {
780 case GST_EVENT_SEGMENT:
781 {
782 GstSegment segment;
783 gint seqnum;
784
785 gst_event_copy_segment (event, &segment);
786 if (segment.format != GST_FORMAT_TIME)
787 goto format_error;
788
789 GST_DEBUG_OBJECT (videorate, "handle NEWSEGMENT");
790
791 /* close up the previous segment, if appropriate */
792 if (videorate->prevbuf) {
793 gint count = 0;
794 GstFlowReturn res;
795
796 res = GST_FLOW_OK;
797 /* fill up to the end of current segment,
798 * or only send out the stored buffer if there is no specific stop.
799 * regardless, prevent going loopy in strange cases */
800 while (res == GST_FLOW_OK && count <= MAGIC_LIMIT
801 && !videorate->drop_only
802 && ((videorate->segment.rate > 0.0
803 && GST_CLOCK_TIME_IS_VALID (videorate->segment.stop)
804 && GST_CLOCK_TIME_IS_VALID (videorate->next_ts)
805 && videorate->next_ts - videorate->segment.base <
806 videorate->segment.stop) || (videorate->segment.rate < 0.0
807 && GST_CLOCK_TIME_IS_VALID (videorate->segment.start)
808 && GST_CLOCK_TIME_IS_VALID (videorate->next_ts)
809 && videorate->next_ts - videorate->segment.base >=
810 videorate->segment.start)
811 || count < 1)) {
812 res =
813 gst_video_rate_flush_prev (videorate, count > 0,
814 GST_CLOCK_TIME_NONE);
815 count++;
816 }
817 if (count > 1) {
818 videorate->dup += count - 1;
819 if (!videorate->silent)
820 gst_video_rate_notify_duplicate (videorate);
821 }
822 /* clean up for the new one; _chain will resume from the new start */
823 gst_video_rate_swap_prev (videorate, NULL, 0);
824 }
825
826 videorate->base_ts = 0;
827 videorate->out_frame_count = 0;
828 videorate->next_ts = GST_CLOCK_TIME_NONE;
829
830 /* We just want to update the accumulated stream_time */
831
832 segment.start = (gint64) (segment.start / videorate->rate);
833 segment.position = (gint64) (segment.position / videorate->rate);
834 if (GST_CLOCK_TIME_IS_VALID (segment.stop))
835 segment.stop = (gint64) (segment.stop / videorate->rate);
836 segment.time = (gint64) (segment.time / videorate->rate);
837
838 gst_segment_copy_into (&segment, &videorate->segment);
839 GST_DEBUG_OBJECT (videorate, "updated segment: %" GST_SEGMENT_FORMAT,
840 &videorate->segment);
841
842
843 seqnum = gst_event_get_seqnum (event);
844 gst_event_unref (event);
845 event = gst_event_new_segment (&segment);
846 gst_event_set_seqnum (event, seqnum);
847
848 break;
849 }
850 case GST_EVENT_SEGMENT_DONE:
851 case GST_EVENT_EOS:{
852 gint count = 0;
853 GstFlowReturn res = GST_FLOW_OK;
854
855 GST_DEBUG_OBJECT (videorate, "Got %s",
856 gst_event_type_get_name (GST_EVENT_TYPE (event)));
857
858 /* If the segment has a stop position, fill the segment */
859 if (GST_CLOCK_TIME_IS_VALID (videorate->segment.stop)) {
860 /* fill up to the end of current segment,
861 * or only send out the stored buffer if there is no specific stop.
862 * regardless, prevent going loopy in strange cases */
863 while (res == GST_FLOW_OK && count <= MAGIC_LIMIT
864 && !videorate->drop_only
865 && ((videorate->segment.rate > 0.0
866 && GST_CLOCK_TIME_IS_VALID (videorate->segment.stop)
867 && GST_CLOCK_TIME_IS_VALID (videorate->next_ts)
868 && videorate->next_ts - videorate->segment.base <
869 videorate->segment.stop) || (videorate->segment.rate < 0.0
870 && GST_CLOCK_TIME_IS_VALID (videorate->segment.start)
871 && GST_CLOCK_TIME_IS_VALID (videorate->next_ts)
872 && videorate->next_ts - videorate->segment.base >=
873 videorate->segment.start)
874 || count < 1)) {
875 res =
876 gst_video_rate_flush_prev (videorate, count > 0,
877 GST_CLOCK_TIME_NONE);
878 count++;
879 }
880 } else if (!videorate->drop_only && videorate->prevbuf) {
881 /* Output at least one frame but if the buffer duration is valid, output
882 * enough frames to use the complete buffer duration */
883 if (GST_BUFFER_DURATION_IS_VALID (videorate->prevbuf)) {
884 GstClockTime end_ts =
885 videorate->next_ts + GST_BUFFER_DURATION (videorate->prevbuf);
886
887 while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
888 ((videorate->segment.rate > 0.0
889 && GST_CLOCK_TIME_IS_VALID (videorate->segment.stop)
890 && GST_CLOCK_TIME_IS_VALID (videorate->next_ts)
891 && videorate->next_ts - videorate->segment.base < end_ts)
892 || count < 1)) {
893 res =
894 gst_video_rate_flush_prev (videorate, count > 0,
895 GST_CLOCK_TIME_NONE);
896 count++;
897 }
898 } else {
899 res =
900 gst_video_rate_flush_prev (videorate, FALSE, GST_CLOCK_TIME_NONE);
901 count = 1;
902 }
903 }
904
905 if (count > 1) {
906 videorate->dup += count - 1;
907 if (!videorate->silent)
908 gst_video_rate_notify_duplicate (videorate);
909 } else if (count == 0) {
910 videorate->drop++;
911 if (!videorate->silent)
912 gst_video_rate_notify_drop (videorate);
913 }
914
915 break;
916 }
917 case GST_EVENT_FLUSH_STOP:
918 /* also resets the segment */
919 GST_DEBUG_OBJECT (videorate, "Got FLUSH_STOP");
920 gst_video_rate_reset (videorate);
921 break;
922 case GST_EVENT_GAP:
923 /* no gaps after videorate, ignore the event */
924 gst_event_unref (event);
925 return TRUE;
926 default:
927 break;
928 }
929
930 return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
931
932 /* ERRORS */
933 format_error:
934 {
935 GST_WARNING_OBJECT (videorate,
936 "Got segment but doesn't have GST_FORMAT_TIME value");
937 return FALSE;
938 }
939 }
940
941 static gboolean
gst_video_rate_src_event(GstBaseTransform * trans,GstEvent * event)942 gst_video_rate_src_event (GstBaseTransform * trans, GstEvent * event)
943 {
944 GstVideoRate *videorate;
945 GstPad *sinkpad;
946 gboolean res = FALSE;
947
948 videorate = GST_VIDEO_RATE (trans);
949 sinkpad = GST_BASE_TRANSFORM_SINK_PAD (trans);
950 switch (GST_EVENT_TYPE (event)) {
951 case GST_EVENT_SEEK:
952 {
953 gdouble srate;
954 GstSeekFlags flags;
955 GstSeekType start_type, stop_type;
956 gint64 start, stop;
957 gint seqnum = gst_event_get_seqnum (event);
958
959 gst_event_parse_seek (event, &srate, NULL, &flags, &start_type, &start,
960 &stop_type, &stop);
961
962 start = (gint64) (start * videorate->rate);
963 if (GST_CLOCK_TIME_IS_VALID (stop)) {
964 stop = (gint64) (stop * videorate->rate);
965 }
966
967 gst_event_unref (event);
968 event = gst_event_new_seek (srate, GST_FORMAT_TIME,
969 flags, start_type, start, stop_type, stop);
970 gst_event_set_seqnum (event, seqnum);
971
972 res = gst_pad_push_event (sinkpad, event);
973 break;
974 }
975 default:
976 res = gst_pad_push_event (sinkpad, event);
977 break;
978 }
979 return res;
980 }
981
982 static gboolean
gst_video_rate_query(GstBaseTransform * trans,GstPadDirection direction,GstQuery * query)983 gst_video_rate_query (GstBaseTransform * trans, GstPadDirection direction,
984 GstQuery * query)
985 {
986 GstVideoRate *videorate = GST_VIDEO_RATE (trans);
987 gboolean res = FALSE;
988 GstPad *otherpad;
989
990 otherpad = (direction == GST_PAD_SRC) ?
991 GST_BASE_TRANSFORM_SINK_PAD (trans) : GST_BASE_TRANSFORM_SRC_PAD (trans);
992
993 switch (GST_QUERY_TYPE (query)) {
994 case GST_QUERY_LATENCY:
995 {
996 GstClockTime min, max;
997 gboolean live;
998 guint64 latency;
999 guint64 avg_period;
1000 gboolean drop_only;
1001 GstPad *peer;
1002
1003 GST_OBJECT_LOCK (videorate);
1004 avg_period = videorate->average_period_set;
1005 drop_only = videorate->drop_only;
1006 GST_OBJECT_UNLOCK (videorate);
1007
1008 if (avg_period == 0 && (peer = gst_pad_get_peer (otherpad))) {
1009 if ((res = gst_pad_query (peer, query))) {
1010 gst_query_parse_latency (query, &live, &min, &max);
1011
1012 GST_DEBUG_OBJECT (videorate, "Peer latency: min %"
1013 GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
1014 GST_TIME_ARGS (min), GST_TIME_ARGS (max));
1015
1016 /* Drop only has no latency, other modes have one frame latency */
1017 if (!drop_only && videorate->from_rate_numerator != 0) {
1018 /* add latency. We don't really know since we hold on to the frames
1019 * until we get a next frame, which can be anything. We assume
1020 * however that this will take from_rate time. */
1021 latency = gst_util_uint64_scale (GST_SECOND,
1022 videorate->from_rate_denominator,
1023 videorate->from_rate_numerator);
1024 } else {
1025 /* no input framerate, we don't know */
1026 latency = 0;
1027 }
1028
1029 GST_DEBUG_OBJECT (videorate, "Our latency: %"
1030 GST_TIME_FORMAT, GST_TIME_ARGS (latency));
1031
1032 min += latency;
1033 if (max != -1)
1034 max += latency;
1035
1036 GST_DEBUG_OBJECT (videorate, "Calculated total latency : min %"
1037 GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
1038 GST_TIME_ARGS (min), GST_TIME_ARGS (max));
1039
1040 gst_query_set_latency (query, live, min, max);
1041 }
1042 gst_object_unref (peer);
1043 break;
1044 }
1045 /* Simple fall back if we don't have a latency or a peer that we
1046 * can ask about its latency yet.. */
1047 res =
1048 GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction,
1049 query);
1050 break;
1051 }
1052 case GST_QUERY_DURATION:
1053 {
1054 GstFormat format;
1055 gint64 duration;
1056 gdouble rate;
1057
1058 res =
1059 GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction,
1060 query);
1061
1062 if (!res)
1063 break;
1064
1065 GST_OBJECT_LOCK (videorate);
1066 rate = videorate->rate;
1067 GST_OBJECT_UNLOCK (videorate);
1068
1069 if (rate == 1.0)
1070 break;
1071
1072 gst_query_parse_duration (query, &format, &duration);
1073
1074 if (format != GST_FORMAT_TIME) {
1075 GST_DEBUG_OBJECT (videorate, "not TIME format");
1076 break;
1077 }
1078 GST_LOG_OBJECT (videorate, "upstream duration: %" G_GINT64_FORMAT,
1079 duration);
1080 /* Shouldn't this be a multiplication if the direction is downstream? */
1081 if (GST_CLOCK_TIME_IS_VALID (duration)) {
1082 duration = (gint64) (duration / rate);
1083 }
1084 GST_LOG_OBJECT (videorate, "our duration: %" G_GINT64_FORMAT, duration);
1085 gst_query_set_duration (query, format, duration);
1086 break;
1087 }
1088 case GST_QUERY_POSITION:
1089 {
1090 GstFormat dst_format;
1091 gint64 dst_value;
1092 gdouble rate;
1093
1094 GST_OBJECT_LOCK (videorate);
1095 rate = videorate->rate;
1096 GST_OBJECT_UNLOCK (videorate);
1097
1098 gst_query_parse_position (query, &dst_format, NULL);
1099
1100 if (dst_format != GST_FORMAT_TIME) {
1101 GST_DEBUG_OBJECT (videorate, "not TIME format");
1102 break;
1103 }
1104 /* Shouldn't this be a multiplication if the direction is downstream? */
1105 dst_value =
1106 (gint64) (gst_segment_to_stream_time (&videorate->segment,
1107 GST_FORMAT_TIME, videorate->last_ts / rate));
1108 GST_LOG_OBJECT (videorate, "our position: %" GST_TIME_FORMAT,
1109 GST_TIME_ARGS (dst_value));
1110 gst_query_set_position (query, dst_format, dst_value);
1111 res = TRUE;
1112 break;
1113 }
1114 default:
1115 res =
1116 GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction,
1117 query);
1118 break;
1119 }
1120
1121 return res;
1122 }
1123
1124 static gboolean
gst_video_rate_propose_allocation(GstBaseTransform * trans,GstQuery * decide_query,GstQuery * query)1125 gst_video_rate_propose_allocation (GstBaseTransform * trans,
1126 GstQuery * decide_query, GstQuery * query)
1127 {
1128 GstBaseTransformClass *klass = GST_BASE_TRANSFORM_CLASS (parent_class);
1129 gboolean res;
1130
1131 /* We should always be passthrough */
1132 g_return_val_if_fail (decide_query == NULL, FALSE);
1133
1134 res = klass->propose_allocation (trans, NULL, query);
1135
1136 if (res) {
1137 guint i = 0;
1138 guint n_allocation;
1139 guint down_min = 0;
1140
1141 n_allocation = gst_query_get_n_allocation_pools (query);
1142
1143 while (i < n_allocation) {
1144 GstBufferPool *pool = NULL;
1145 guint size, min, max;
1146
1147 gst_query_parse_nth_allocation_pool (query, i, &pool, &size, &min, &max);
1148
1149 if (min == max) {
1150 if (pool)
1151 gst_object_unref (pool);
1152 gst_query_remove_nth_allocation_pool (query, i);
1153 n_allocation--;
1154 down_min = MAX (min, down_min);
1155 continue;
1156 }
1157
1158 gst_query_set_nth_allocation_pool (query, i, pool, size, min + 1, max);
1159 if (pool)
1160 gst_object_unref (pool);
1161 i++;
1162 }
1163
1164 if (n_allocation == 0) {
1165 GstCaps *caps;
1166 GstVideoInfo info;
1167
1168 gst_query_parse_allocation (query, &caps, NULL);
1169 gst_video_info_from_caps (&info, caps);
1170
1171 gst_query_add_allocation_pool (query, NULL, info.size, down_min + 1, 0);
1172 }
1173 }
1174
1175 return res;
1176 }
1177
1178 static GstFlowReturn
gst_video_rate_trans_ip_max_avg(GstVideoRate * videorate,GstBuffer * buf)1179 gst_video_rate_trans_ip_max_avg (GstVideoRate * videorate, GstBuffer * buf)
1180 {
1181 GstClockTime ts = GST_BUFFER_TIMESTAMP (buf);
1182
1183 videorate->in++;
1184
1185 if (!GST_CLOCK_TIME_IS_VALID (ts) || videorate->wanted_diff == 0)
1186 goto push;
1187
1188 /* drop frames if they exceed our output rate */
1189 if (GST_CLOCK_TIME_IS_VALID (videorate->last_ts)) {
1190 GstClockTimeDiff diff =
1191 videorate->segment.rate <
1192 0 ? videorate->last_ts - ts : ts - videorate->last_ts;
1193
1194 /* Drop buffer if its early compared to the desired frame rate and
1195 * the current average is higher than the desired average
1196 */
1197 if (diff < videorate->wanted_diff &&
1198 videorate->average < videorate->wanted_diff)
1199 goto drop;
1200
1201 /* Update average */
1202 if (videorate->average) {
1203 GstClockTimeDiff wanted_diff;
1204
1205 if (G_LIKELY (videorate->average_period > videorate->wanted_diff))
1206 wanted_diff = videorate->wanted_diff;
1207 else
1208 wanted_diff = videorate->average_period * 10;
1209
1210 videorate->average =
1211 gst_util_uint64_scale_round (videorate->average,
1212 videorate->average_period - wanted_diff,
1213 videorate->average_period) +
1214 gst_util_uint64_scale_round (diff, wanted_diff,
1215 videorate->average_period);
1216 } else {
1217 videorate->average = diff;
1218 }
1219 }
1220
1221 videorate->last_ts = ts;
1222
1223 push:
1224 videorate->out++;
1225 return GST_FLOW_OK;
1226
1227 drop:
1228 if (!videorate->silent)
1229 gst_video_rate_notify_drop (videorate);
1230 return GST_BASE_TRANSFORM_FLOW_DROPPED;
1231 }
1232
1233 /* Check if downstream forces variable framerate (0/1) and if
1234 * it is the case, use variable framerate ourself
1235 * Otherwise compute the framerate from the 2 buffers that we
1236 * have already received and make use of it as wanted framerate
1237 */
1238 static void
gst_video_rate_check_variable_rate(GstVideoRate * videorate,GstBuffer * buffer)1239 gst_video_rate_check_variable_rate (GstVideoRate * videorate,
1240 GstBuffer * buffer)
1241 {
1242 GstStructure *st;
1243 gint fps_d, fps_n;
1244 GstCaps *srcpadcaps, *tmpcaps, *downstream_caps;
1245 GstPad *pad = NULL;
1246
1247 srcpadcaps =
1248 gst_pad_get_current_caps (GST_BASE_TRANSFORM_SRC_PAD (videorate));
1249
1250 gst_video_guess_framerate (GST_BUFFER_PTS (buffer) -
1251 GST_BUFFER_PTS (videorate->prevbuf), &fps_n, &fps_d);
1252
1253 tmpcaps = gst_caps_copy (srcpadcaps);
1254 st = gst_caps_get_structure (tmpcaps, 0);
1255 gst_structure_set (st, "framerate", GST_TYPE_FRACTION, fps_n, fps_d, NULL);
1256 gst_caps_unref (srcpadcaps);
1257
1258 pad = gst_pad_get_peer (GST_BASE_TRANSFORM_SRC_PAD (videorate));
1259 downstream_caps = gst_pad_query_caps (pad, NULL);
1260 if (pad && !gst_caps_can_intersect (tmpcaps, downstream_caps)) {
1261 videorate->force_variable_rate = TRUE;
1262 gst_caps_unref (downstream_caps);
1263 GST_DEBUG_OBJECT (videorate, "Downstream forces variable framerate"
1264 " respecting it");
1265
1266 goto done;
1267 }
1268 gst_caps_unref (downstream_caps);
1269
1270 videorate->to_rate_numerator = fps_n;
1271 videorate->to_rate_denominator = fps_d;
1272
1273 GST_INFO_OBJECT (videorate, "Computed framerate to %d/%d",
1274 videorate->to_rate_numerator, videorate->to_rate_denominator);
1275
1276 videorate->updating_caps = TRUE;
1277 gst_base_transform_update_src_caps (GST_BASE_TRANSFORM (videorate), tmpcaps);
1278
1279 done:
1280 gst_caps_unref (tmpcaps);
1281 if (pad)
1282 gst_object_unref (pad);
1283 }
1284
1285 static GstFlowReturn
gst_video_rate_transform_ip(GstBaseTransform * trans,GstBuffer * buffer)1286 gst_video_rate_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
1287 {
1288 GstVideoRate *videorate;
1289 GstFlowReturn res = GST_BASE_TRANSFORM_FLOW_DROPPED;
1290 GstClockTime intime, in_ts, in_dur, last_ts;
1291 GstClockTime avg_period;
1292 gboolean skip = FALSE;
1293
1294 videorate = GST_VIDEO_RATE (trans);
1295
1296 /* make sure the denominators are not 0 */
1297 if (videorate->from_rate_denominator == 0 ||
1298 videorate->to_rate_denominator == 0)
1299 goto not_negotiated;
1300
1301 if (videorate->to_rate_numerator == 0 && videorate->prevbuf &&
1302 !videorate->force_variable_rate) {
1303 gst_video_rate_check_variable_rate (videorate, buffer);
1304 }
1305
1306 GST_OBJECT_LOCK (videorate);
1307 avg_period = videorate->average_period_set;
1308 GST_OBJECT_UNLOCK (videorate);
1309
1310 /* MT-safe switching between modes */
1311 if (G_UNLIKELY (avg_period != videorate->average_period)) {
1312 gboolean switch_mode = (avg_period == 0 || videorate->average_period == 0);
1313 videorate->average_period = avg_period;
1314 videorate->last_ts = GST_CLOCK_TIME_NONE;
1315
1316 if (switch_mode) {
1317 if (avg_period) {
1318 /* enabling average mode */
1319 videorate->average = 0;
1320 /* make sure no cached buffers from regular mode are left */
1321 gst_video_rate_swap_prev (videorate, NULL, 0);
1322 } else {
1323 /* enable regular mode */
1324 videorate->next_ts = GST_CLOCK_TIME_NONE;
1325 skip = TRUE;
1326 }
1327
1328 /* max averaging mode has a no latency, normal mode does */
1329 gst_element_post_message (GST_ELEMENT (videorate),
1330 gst_message_new_latency (GST_OBJECT (videorate)));
1331 }
1332 }
1333
1334 if (videorate->average_period > 0)
1335 return gst_video_rate_trans_ip_max_avg (videorate, buffer);
1336
1337 in_ts = GST_BUFFER_TIMESTAMP (buffer);
1338 in_dur = GST_BUFFER_DURATION (buffer);
1339
1340 if (G_UNLIKELY (in_ts == GST_CLOCK_TIME_NONE)) {
1341 /* For reverse playback, we need all input timestamps as we can't
1342 * guess from the previous buffers timestamp and duration */
1343 if (G_UNLIKELY (in_ts == GST_CLOCK_TIME_NONE
1344 && videorate->segment.rate < 0.0))
1345 goto invalid_buffer;
1346 in_ts = videorate->last_ts;
1347 if (G_UNLIKELY (in_ts == GST_CLOCK_TIME_NONE))
1348 goto invalid_buffer;
1349 }
1350
1351 /* get the time of the next expected buffer timestamp, we use this when the
1352 * next buffer has -1 as a timestamp */
1353 last_ts = videorate->last_ts;
1354 videorate->last_ts = in_ts;
1355 if (in_dur != GST_CLOCK_TIME_NONE && videorate->segment.rate > 0.0)
1356 videorate->last_ts += in_dur;
1357
1358 GST_DEBUG_OBJECT (videorate, "got buffer with timestamp %" GST_TIME_FORMAT,
1359 GST_TIME_ARGS (in_ts));
1360
1361 /* the input time is the time in the segment + all previously accumulated
1362 * segments */
1363 intime = in_ts + videorate->segment.base;
1364
1365 /* we need to have two buffers to compare */
1366 if (videorate->prevbuf == NULL || videorate->drop_only) {
1367 /* We can calculate the duration of the buffer here if not given for
1368 * reverse playback. We need this later */
1369 if (videorate->segment.rate < 0.0 && !GST_BUFFER_DURATION_IS_VALID (buffer)) {
1370 /* As we require valid timestamps all the time for reverse playback, we either
1371 * have a valid last_ts or we're at the very first buffer. */
1372 if (!GST_CLOCK_TIME_IS_VALID (last_ts))
1373 GST_BUFFER_DURATION (buffer) = videorate->segment.stop - in_ts;
1374 else
1375 GST_BUFFER_DURATION (buffer) = last_ts - in_ts;
1376 }
1377
1378 gst_video_rate_swap_prev (videorate, buffer, intime);
1379 videorate->in++;
1380 if (!GST_CLOCK_TIME_IS_VALID (videorate->next_ts)) {
1381 /* new buffer, we expect to output a buffer that matches the first
1382 * timestamp in the segment */
1383 if (videorate->skip_to_first || skip) {
1384 videorate->next_ts = intime;
1385 if (videorate->segment.rate < 0.0) {
1386 videorate->base_ts = videorate->segment.stop - in_ts;
1387 } else {
1388 videorate->base_ts = in_ts - videorate->segment.start;
1389 }
1390 videorate->out_frame_count = 0;
1391 } else {
1392 if (videorate->segment.rate < 0.0) {
1393 if (videorate->to_rate_numerator) {
1394 GstClockTime frame_duration = gst_util_uint64_scale (1,
1395 videorate->to_rate_denominator * GST_SECOND,
1396 videorate->to_rate_numerator);
1397
1398 videorate->next_ts =
1399 videorate->segment.stop + videorate->segment.base;
1400
1401 if (videorate->next_ts > frame_duration)
1402 videorate->next_ts =
1403 MAX (videorate->segment.start,
1404 videorate->next_ts - frame_duration);
1405 else
1406 videorate->next_ts = videorate->segment.start;
1407 } else {
1408 /* What else can we do? */
1409 videorate->next_ts = intime;
1410 }
1411 } else {
1412 videorate->next_ts =
1413 videorate->segment.start + videorate->segment.base;
1414 }
1415 }
1416 }
1417
1418 /* In drop-only mode we can already decide here if we should output the
1419 * current frame or drop it because it's coming earlier than our minimum
1420 * allowed frame period. This also keeps latency down to 0 frames
1421 */
1422 if (videorate->drop_only) {
1423 if ((videorate->segment.rate > 0.0 && intime >= videorate->next_ts) ||
1424 (videorate->segment.rate < 0.0 && intime <= videorate->next_ts)) {
1425 GstFlowReturn r;
1426
1427 /* The buffer received from basetransform is garanteed to be writable.
1428 * It just needs to be reffed so the buffer won't be consumed once pushed and
1429 * GstBaseTransform can get its reference back. */
1430 if ((r = gst_video_rate_push_buffer (videorate,
1431 gst_buffer_ref (buffer), FALSE,
1432 GST_CLOCK_TIME_NONE)) != GST_FLOW_OK) {
1433 res = r;
1434 goto done;
1435 }
1436 }
1437 /* No need to keep the buffer around for longer */
1438 gst_buffer_replace (&videorate->prevbuf, NULL);
1439 }
1440 } else {
1441 GstClockTime prevtime;
1442 gint count = 0;
1443 gint64 diff1, diff2;
1444
1445 prevtime = videorate->prev_ts;
1446
1447 GST_LOG_OBJECT (videorate,
1448 "BEGINNING prev buf %" GST_TIME_FORMAT " new buf %" GST_TIME_FORMAT
1449 " outgoing ts %" GST_TIME_FORMAT, GST_TIME_ARGS (prevtime),
1450 GST_TIME_ARGS (intime), GST_TIME_ARGS (videorate->next_ts));
1451
1452 videorate->in++;
1453
1454 /* drop new buffer if it's before previous one */
1455 if ((videorate->segment.rate > 0.0 && intime < prevtime) ||
1456 (videorate->segment.rate < 0.0 && intime > prevtime)) {
1457 GST_DEBUG_OBJECT (videorate,
1458 "The new buffer (%" GST_TIME_FORMAT
1459 ") is before the previous buffer (%"
1460 GST_TIME_FORMAT "). Dropping new buffer.",
1461 GST_TIME_ARGS (intime), GST_TIME_ARGS (prevtime));
1462 videorate->drop++;
1463 if (!videorate->silent)
1464 gst_video_rate_notify_drop (videorate);
1465 goto done;
1466 }
1467
1468 if (videorate->max_duplication_time > 0) {
1469 /* We already know that intime and prevtime are not out of order, based
1470 * on the previous condition. Using ABS in case rate < 0, in which case
1471 * the order is reversed. */
1472 if (ABS (GST_CLOCK_DIFF (intime,
1473 prevtime)) > videorate->max_duplication_time) {
1474 GST_DEBUG_OBJECT (videorate,
1475 "The new buffer (%" GST_TIME_FORMAT
1476 ") is further away from previous buffer (%"
1477 GST_TIME_FORMAT ") than max-duplication-time (%" GST_TIME_FORMAT
1478 ")", GST_TIME_ARGS (intime), GST_TIME_ARGS (prevtime),
1479 GST_TIME_ARGS (videorate->max_duplication_time));
1480 /* First send out enough buffers to actually reach the time of the
1481 * previous buffer */
1482 if (videorate->segment.rate < 0.0) {
1483 while (videorate->next_ts > prevtime) {
1484 gst_video_rate_flush_prev (videorate, count > 0,
1485 GST_CLOCK_TIME_NONE);
1486 count += 1;
1487 }
1488 } else {
1489 while (videorate->next_ts <= prevtime) {
1490 gst_video_rate_flush_prev (videorate, count > 0,
1491 GST_CLOCK_TIME_NONE);
1492 count += 1;
1493 }
1494 }
1495
1496 if (count > 1) {
1497 videorate->dup += count - 1;
1498 if (!videorate->silent)
1499 gst_video_rate_notify_duplicate (videorate);
1500 }
1501
1502 /* The gap between the two buffers is too large. Don't fill it, just
1503 * let a discont through */
1504 videorate->discont = TRUE;
1505
1506 if (videorate->segment.rate < 0.0) {
1507 videorate->base_ts -= prevtime - intime;
1508 } else {
1509 videorate->base_ts += intime - prevtime;
1510 }
1511 videorate->next_ts = intime;
1512 /* Swap in new buffer and get rid of old buffer so that starting with
1513 * the next input buffer we output from the new position */
1514 gst_video_rate_swap_prev (videorate, buffer, intime);
1515 goto done;
1516 }
1517 }
1518
1519 /* got 2 buffers, see which one is the best */
1520 do {
1521 GstClockTime next_ts;
1522
1523 if (videorate->segment.rate < 0.0) {
1524 /* Make sure that we have a duration for this buffer. The previous
1525 * buffer already has a duration given by either exactly this code,
1526 * or the code above for the very first buffer */
1527 g_assert (GST_BUFFER_DURATION_IS_VALID (videorate->prevbuf));
1528 if (!GST_BUFFER_DURATION_IS_VALID (buffer))
1529 GST_BUFFER_DURATION (buffer) =
1530 prevtime > intime ? prevtime - intime : 0;
1531 } else {
1532 /* Make sure that we have a duration for previous buffer */
1533 if (!GST_BUFFER_DURATION_IS_VALID (videorate->prevbuf))
1534 GST_BUFFER_DURATION (videorate->prevbuf) =
1535 intime > prevtime ? intime - prevtime : 0;
1536 }
1537
1538 #ifndef ABSDIFF
1539 #define ABSDIFF(a, b) (((a) > (b)) ? (a) - (b) : (b) - (a))
1540 #endif
1541
1542 /* take absolute diffs */
1543 if (videorate->segment.rate < 0.0) {
1544 GstClockTime next_end_ts;
1545 GstClockTime prev_endtime;
1546 GstClockTime in_endtime;
1547
1548 next_ts = videorate->next_ts;
1549
1550 prev_endtime =
1551 MAX (prevtime + GST_BUFFER_DURATION (videorate->prevbuf),
1552 videorate->segment.stop);
1553 in_endtime =
1554 MAX (intime + GST_BUFFER_DURATION (buffer),
1555 videorate->segment.stop);
1556
1557 if (videorate->to_rate_numerator) {
1558 GstClockTime frame_duration = gst_util_uint64_scale (1,
1559 videorate->to_rate_denominator * GST_SECOND,
1560 videorate->to_rate_numerator);
1561 next_end_ts = MAX (next_ts + frame_duration, videorate->segment.stop);
1562 } else {
1563 next_end_ts =
1564 MAX (next_ts + GST_BUFFER_DURATION (videorate->prevbuf),
1565 videorate->segment.stop);
1566 }
1567 next_ts *= videorate->rate;
1568 next_end_ts *= videorate->rate;
1569
1570 diff1 = ABSDIFF (prev_endtime, next_end_ts);
1571 diff2 = ABSDIFF (in_endtime, next_end_ts);
1572
1573 GST_LOG_OBJECT (videorate,
1574 "diff with prev %" GST_TIME_FORMAT " diff with new %"
1575 GST_TIME_FORMAT " outgoing ts %" GST_TIME_FORMAT,
1576 GST_TIME_ARGS (diff1), GST_TIME_ARGS (diff2),
1577 GST_TIME_ARGS (next_end_ts));
1578 } else {
1579 next_ts = videorate->next_ts * videorate->rate;
1580
1581 diff1 = ABSDIFF (prevtime, next_ts);
1582 diff2 = ABSDIFF (intime, next_ts);
1583
1584 GST_LOG_OBJECT (videorate,
1585 "diff with prev %" GST_TIME_FORMAT " diff with new %"
1586 GST_TIME_FORMAT " outgoing ts %" GST_TIME_FORMAT,
1587 GST_TIME_ARGS (diff1), GST_TIME_ARGS (diff2),
1588 GST_TIME_ARGS (next_ts));
1589 }
1590
1591 /* output first one when its the best */
1592 if (diff1 <= diff2) {
1593 GstFlowReturn r;
1594 count++;
1595
1596 /* on error the _flush function posted a warning already */
1597 if ((r = gst_video_rate_flush_prev (videorate,
1598 count > 1, intime)) != GST_FLOW_OK) {
1599 res = r;
1600 goto done;
1601 }
1602 }
1603
1604 /* continue while the first one was the best, if they were equal avoid
1605 * going into an infinite loop */
1606 }
1607 while (diff1 < diff2);
1608
1609 /* if we outputed the first buffer more then once, we have dups */
1610 if (count > 1) {
1611 videorate->dup += count - 1;
1612 if (!videorate->silent)
1613 gst_video_rate_notify_duplicate (videorate);
1614 }
1615 /* if we didn't output the first buffer, we have a drop */
1616 else if (count == 0) {
1617 videorate->drop++;
1618
1619 if (!videorate->silent)
1620 gst_video_rate_notify_drop (videorate);
1621
1622 GST_LOG_OBJECT (videorate,
1623 "new is best, old never used, drop, outgoing ts %"
1624 GST_TIME_FORMAT, GST_TIME_ARGS (videorate->next_ts));
1625 }
1626 GST_LOG_OBJECT (videorate,
1627 "END, putting new in old, diff1 %" GST_TIME_FORMAT
1628 ", diff2 %" GST_TIME_FORMAT ", next_ts %" GST_TIME_FORMAT
1629 ", in %" G_GUINT64_FORMAT ", out %" G_GUINT64_FORMAT ", drop %"
1630 G_GUINT64_FORMAT ", dup %" G_GUINT64_FORMAT, GST_TIME_ARGS (diff1),
1631 GST_TIME_ARGS (diff2), GST_TIME_ARGS (videorate->next_ts),
1632 videorate->in, videorate->out, videorate->drop, videorate->dup);
1633
1634 /* swap in new one when it's the best */
1635 gst_video_rate_swap_prev (videorate, buffer, intime);
1636 }
1637 done:
1638 return res;
1639
1640 /* ERRORS */
1641 not_negotiated:
1642 {
1643 GST_WARNING_OBJECT (videorate, "no framerate negotiated");
1644 res = GST_FLOW_NOT_NEGOTIATED;
1645 goto done;
1646 }
1647
1648 invalid_buffer:
1649 {
1650 GST_WARNING_OBJECT (videorate,
1651 "Got buffer with GST_CLOCK_TIME_NONE timestamp, discarding it");
1652 res = GST_BASE_TRANSFORM_FLOW_DROPPED;
1653 goto done;
1654 }
1655 }
1656
1657 static gboolean
gst_video_rate_start(GstBaseTransform * trans)1658 gst_video_rate_start (GstBaseTransform * trans)
1659 {
1660 gst_video_rate_reset (GST_VIDEO_RATE (trans));
1661 return TRUE;
1662 }
1663
1664 static gboolean
gst_video_rate_stop(GstBaseTransform * trans)1665 gst_video_rate_stop (GstBaseTransform * trans)
1666 {
1667 gst_video_rate_reset (GST_VIDEO_RATE (trans));
1668 return TRUE;
1669 }
1670
1671 static void
gst_videorate_update_duration(GstVideoRate * videorate)1672 gst_videorate_update_duration (GstVideoRate * videorate)
1673 {
1674 GstMessage *m;
1675
1676 m = gst_message_new_duration_changed (GST_OBJECT (videorate));
1677 gst_element_post_message (GST_ELEMENT (videorate), m);
1678 }
1679
1680 static void
gst_video_rate_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)1681 gst_video_rate_set_property (GObject * object,
1682 guint prop_id, const GValue * value, GParamSpec * pspec)
1683 {
1684 GstVideoRate *videorate = GST_VIDEO_RATE (object);
1685 gboolean latency_changed = FALSE;
1686
1687 GST_OBJECT_LOCK (videorate);
1688 switch (prop_id) {
1689 case PROP_SILENT:
1690 videorate->silent = g_value_get_boolean (value);
1691 break;
1692 case PROP_NEW_PREF:
1693 videorate->new_pref = g_value_get_double (value);
1694 break;
1695 case PROP_SKIP_TO_FIRST:
1696 videorate->skip_to_first = g_value_get_boolean (value);
1697 break;
1698 case PROP_DROP_ONLY:{
1699 gboolean new_value = g_value_get_boolean (value);
1700
1701 /* Latency changes if we switch drop-only mode */
1702 latency_changed = new_value != videorate->drop_only;
1703 videorate->drop_only = g_value_get_boolean (value);
1704 goto reconfigure;
1705 }
1706 case PROP_AVERAGE_PERIOD:
1707 videorate->average_period_set = g_value_get_uint64 (value);
1708 break;
1709 case PROP_MAX_RATE:
1710 g_atomic_int_set (&videorate->max_rate, g_value_get_int (value));
1711 goto reconfigure;
1712 case PROP_RATE:
1713 videorate->rate = g_value_get_double (value);
1714 GST_OBJECT_UNLOCK (videorate);
1715
1716 gst_videorate_update_duration (videorate);
1717 return;
1718 case PROP_MAX_DUPLICATION_TIME:
1719 videorate->max_duplication_time = g_value_get_uint64 (value);
1720 break;
1721 default:
1722 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1723 break;
1724 }
1725 GST_OBJECT_UNLOCK (videorate);
1726
1727 return;
1728
1729 reconfigure:
1730 GST_OBJECT_UNLOCK (videorate);
1731 gst_base_transform_reconfigure_src (GST_BASE_TRANSFORM (videorate));
1732
1733 if (latency_changed) {
1734 gst_element_post_message (GST_ELEMENT (videorate),
1735 gst_message_new_latency (GST_OBJECT (videorate)));
1736 }
1737 }
1738
1739 static void
gst_video_rate_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)1740 gst_video_rate_get_property (GObject * object,
1741 guint prop_id, GValue * value, GParamSpec * pspec)
1742 {
1743 GstVideoRate *videorate = GST_VIDEO_RATE (object);
1744
1745 GST_OBJECT_LOCK (videorate);
1746 switch (prop_id) {
1747 case PROP_IN:
1748 g_value_set_uint64 (value, videorate->in);
1749 break;
1750 case PROP_OUT:
1751 g_value_set_uint64 (value, videorate->out);
1752 break;
1753 case PROP_DUP:
1754 g_value_set_uint64 (value, videorate->dup);
1755 break;
1756 case PROP_DROP:
1757 g_value_set_uint64 (value, videorate->drop);
1758 break;
1759 case PROP_SILENT:
1760 g_value_set_boolean (value, videorate->silent);
1761 break;
1762 case PROP_NEW_PREF:
1763 g_value_set_double (value, videorate->new_pref);
1764 break;
1765 case PROP_SKIP_TO_FIRST:
1766 g_value_set_boolean (value, videorate->skip_to_first);
1767 break;
1768 case PROP_DROP_ONLY:
1769 g_value_set_boolean (value, videorate->drop_only);
1770 break;
1771 case PROP_AVERAGE_PERIOD:
1772 g_value_set_uint64 (value, videorate->average_period_set);
1773 break;
1774 case PROP_MAX_RATE:
1775 g_value_set_int (value, g_atomic_int_get (&videorate->max_rate));
1776 break;
1777 case PROP_RATE:
1778 g_value_set_double (value, videorate->rate);
1779 break;
1780 case PROP_MAX_DUPLICATION_TIME:
1781 g_value_set_uint64 (value, videorate->max_duplication_time);
1782 break;
1783 default:
1784 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1785 break;
1786 }
1787 GST_OBJECT_UNLOCK (videorate);
1788 }
1789
1790 static gboolean
plugin_init(GstPlugin * plugin)1791 plugin_init (GstPlugin * plugin)
1792 {
1793 GST_DEBUG_CATEGORY_INIT (video_rate_debug, "videorate", 0,
1794 "VideoRate stream fixer");
1795
1796 return gst_element_register (plugin, "videorate", GST_RANK_NONE,
1797 GST_TYPE_VIDEO_RATE);
1798 }
1799
1800 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1801 GST_VERSION_MINOR,
1802 videorate,
1803 "Adjusts video frames",
1804 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
1805