1 /* Generic video mixer plugin
2 * Copyright (C) 2004, 2008 Wim Taymans <wim@fluendo.com>
3 * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
22 * SECTION:element-videomixer2
24 * Videomixer2 can accept AYUV, ARGB and BGRA video streams. For each of the requested
25 * sink pads it will compare the incoming geometry and framerate to define the
26 * output parameters. Indeed output video frames will have the geometry of the
27 * biggest incoming video stream and the framerate of the fastest incoming one.
29 * All sink pads must be either AYUV, ARGB or BGRA, but a mixture of them is not
30 * supported. The src pad will have the same colorspace as the sinks.
31 * No colorspace conversion is done.
33 * Individual parameters for each input stream can be configured on the
36 * At this stage, videomixer2 is considered UNSTABLE. The API provided in the
37 * properties may yet change in the near future. When videomixer2 is stable,
38 * it will replace #videomixer
41 * <title>Sample pipelines</title>
44 * videotestsrc pattern=1 ! \
45 * video/x-raw-yuv,format=\(fourcc\)AYUV,framerate=\(fraction\)10/1,width=100,height=100 ! \
46 * videobox border-alpha=0 top=-70 bottom=-70 right=-220 ! \
47 * videomixer2 name=mix sink_0::alpha=0.7 sink_1::alpha=0.5 ! \
48 * ffmpegcolorspace ! xvimagesink \
50 * video/x-raw-yuv,format=\(fourcc\)AYUV,framerate=\(fraction\)5/1,width=320,height=240 ! mix.
51 * ]| A pipeline to demonstrate videomixer used together with videobox.
52 * This should show a 320x240 pixels video test source with some transparency
53 * showing the background checker pattern. Another video test source with just
54 * the snow pattern of 100x100 pixels is overlayed on top of the first one on
55 * the left vertically centered with a small transparency showing the first
56 * video test source behind and the checker pattern under it. Note that the
57 * framerate of the output video is 10 frames per second.
59 * gst-launch videotestsrc pattern=1 ! \
60 * video/x-raw-rgb, framerate=\(fraction\)10/1, width=100, height=100 ! \
61 * videomixer2 name=mix ! ffmpegcolorspace ! ximagesink \
63 * video/x-raw-rgb, framerate=\(fraction\)5/1, width=320, height=240 ! mix.
64 * ]| A pipeline to demostrate bgra mixing. (This does not demonstrate alpha blending).
66 * gst-launch videotestsrc pattern=1 ! \
67 * video/x-raw-yuv,format =\(fourcc\)I420, framerate=\(fraction\)10/1, width=100, height=100 ! \
68 * videomixer2 name=mix ! ffmpegcolorspace ! ximagesink \
70 * video/x-raw-yuv,format=\(fourcc\)I420, framerate=\(fraction\)5/1, width=320, height=240 ! mix.
71 * ]| A pipeline to test I420
73 * gst-launch videomixer2 name=mixer sink_1::alpha=0.5 sink_1::xpos=50 sink_1::ypos=50 ! \
74 * ffmpegcolorspace ! ximagesink \
75 * videotestsrc pattern=snow timestamp-offset=3000000000 ! \
76 * "video/x-raw-yuv,format=(fourcc)AYUV,width=640,height=480,framerate=(fraction)30/1" ! \
77 * timeoverlay ! queue2 ! mixer. \
78 * videotestsrc pattern=smpte ! \
79 * "video/x-raw-yuv,format=(fourcc)AYUV,width=800,height=600,framerate=(fraction)10/1" ! \
80 * timeoverlay ! queue2 ! mixer.
81 * ]| A pipeline to demonstrate synchronized mixing (the second stream starts after 3 seconds)
91 #include "videomixer2.h"
92 #include "videomixer2pad.h"
94 #include <gst/controller/gstcontroller.h>
97 #define orc_memset memset
99 #include <orc/orcfunctions.h>
102 GST_DEBUG_CATEGORY_STATIC (gst_videomixer2_debug);
103 #define GST_CAT_DEFAULT gst_videomixer2_debug
105 #define GST_VIDEO_MIXER2_GET_LOCK(mix) \
106 (GST_VIDEO_MIXER2(mix)->lock)
107 #define GST_VIDEO_MIXER2_LOCK(mix) \
108 (g_mutex_lock(GST_VIDEO_MIXER2_GET_LOCK (mix)))
109 #define GST_VIDEO_MIXER2_UNLOCK(mix) \
110 (g_mutex_unlock(GST_VIDEO_MIXER2_GET_LOCK (mix)))
112 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
115 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";"
116 GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_ABGR ";"
117 GST_VIDEO_CAPS_YUV ("Y444") ";" GST_VIDEO_CAPS_YUV ("Y42B") ";"
118 GST_VIDEO_CAPS_YUV ("YUY2") ";" GST_VIDEO_CAPS_YUV ("UYVY") ";"
119 GST_VIDEO_CAPS_YUV ("YVYU") ";"
120 GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12") ";"
121 GST_VIDEO_CAPS_YUV ("Y41B") ";" GST_VIDEO_CAPS_RGB ";"
122 GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
123 GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx)
126 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
129 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";"
130 GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_ABGR ";"
131 GST_VIDEO_CAPS_YUV ("Y444") ";" GST_VIDEO_CAPS_YUV ("Y42B") ";"
132 GST_VIDEO_CAPS_YUV ("YUY2") ";" GST_VIDEO_CAPS_YUV ("UYVY") ";"
133 GST_VIDEO_CAPS_YUV ("YVYU") ";"
134 GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12") ";"
135 GST_VIDEO_CAPS_YUV ("Y41B") ";" GST_VIDEO_CAPS_RGB ";"
136 GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
137 GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx)
140 static void gst_videomixer2_child_proxy_init (gpointer g_iface,
141 gpointer iface_data);
142 static gboolean gst_videomixer2_push_sink_event (GstVideoMixer2 * mix,
144 static void gst_videomixer2_release_pad (GstElement * element, GstPad * pad);
145 static void gst_videomixer2_reset_qos (GstVideoMixer2 * mix);
148 _do_init (GType object_type)
150 static const GInterfaceInfo child_proxy_info = {
151 (GInterfaceInitFunc) gst_videomixer2_child_proxy_init,
156 g_type_add_interface_static (object_type, GST_TYPE_CHILD_PROXY,
160 struct _GstVideoMixer2Collect
162 GstCollectData2 collect; /* we extend the CollectData */
164 GstVideoMixer2Pad *mixpad;
166 GstBuffer *queued; /* buffer for which we don't know the end time yet */
168 GstBuffer *buffer; /* buffer that should be blended now */
169 GstClockTime start_time;
170 GstClockTime end_time;
173 #define DEFAULT_PAD_ZORDER 0
174 #define DEFAULT_PAD_XPOS 0
175 #define DEFAULT_PAD_YPOS 0
176 #define DEFAULT_PAD_ALPHA 1.0
186 G_DEFINE_TYPE (GstVideoMixer2Pad, gst_videomixer2_pad, GST_TYPE_PAD);
189 gst_videomixer2_collect_free (GstCollectData2 * data)
191 GstVideoMixer2Collect *cdata = (GstVideoMixer2Collect *) data;
193 gst_buffer_replace (&cdata->buffer, NULL);
197 gst_videomixer2_update_src_caps (GstVideoMixer2 * mix)
200 gint best_width = -1, best_height = -1;
201 gdouble best_fps = -1, cur_fps;
202 gint best_fps_n = -1, best_fps_d = -1;
205 GST_VIDEO_MIXER2_LOCK (mix);
207 for (l = mix->sinkpads; l; l = l->next) {
208 GstVideoMixer2Pad *mpad = l->data;
209 gint this_width, this_height;
211 if (mpad->fps_n == 0 || mpad->fps_d == 0 ||
212 mpad->width == 0 || mpad->height == 0)
215 this_width = mpad->width + MAX (mpad->xpos, 0);
216 this_height = mpad->height + MAX (mpad->ypos, 0);
218 if (best_width < this_width)
219 best_width = this_width;
220 if (best_height < this_height)
221 best_height = this_height;
223 if (mpad->fps_d == 0)
226 gst_util_fraction_to_double (mpad->fps_n, mpad->fps_d, &cur_fps);
227 if (best_fps < cur_fps) {
229 best_fps_n = mpad->fps_n;
230 best_fps_d = mpad->fps_d;
234 if (best_fps_n <= 0 && best_fps_d <= 0) {
240 if (best_width > 0 && best_height > 0 && best_fps > 0) {
241 GstCaps *caps, *peercaps;
244 if (mix->fps_n != best_fps_n || mix->fps_d != best_fps_d) {
245 if (mix->segment.last_stop != -1) {
246 mix->ts_offset = mix->segment.last_stop - mix->segment.start;
251 caps = gst_video_format_new_caps (mix->format,
252 best_width, best_height, best_fps_n, best_fps_d,
253 mix->par_n, mix->par_d);
255 peercaps = gst_pad_peer_get_caps (mix->srcpad);
259 s = gst_caps_get_structure (caps, 0);
260 gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT, "height",
261 GST_TYPE_INT_RANGE, 1, G_MAXINT, "framerate", GST_TYPE_FRACTION_RANGE,
262 0, 1, G_MAXINT, 1, NULL);
264 tmp = gst_caps_intersect (caps, peercaps);
265 gst_caps_unref (caps);
266 gst_caps_unref (peercaps);
268 if (gst_caps_is_empty (caps)) {
270 GST_VIDEO_MIXER2_UNLOCK (mix);
274 gst_caps_truncate (caps);
275 s = gst_caps_get_structure (caps, 0);
276 gst_structure_fixate_field_nearest_int (s, "width", best_width);
277 gst_structure_fixate_field_nearest_int (s, "height", best_height);
278 gst_structure_fixate_field_nearest_fraction (s, "framerate", best_fps_n,
281 gst_structure_get_int (s, "width", &best_width);
282 gst_structure_get_int (s, "height", &best_height);
283 gst_structure_get_fraction (s, "fraction", &best_fps_n, &best_fps_d);
286 mix->fps_n = best_fps_n;
287 mix->fps_d = best_fps_d;
288 mix->width = best_width;
289 mix->height = best_height;
291 GST_VIDEO_MIXER2_UNLOCK (mix);
292 ret = gst_pad_set_caps (mix->srcpad, caps);
293 gst_caps_unref (caps);
295 GST_VIDEO_MIXER2_UNLOCK (mix);
304 gst_videomixer2_pad_sink_setcaps (GstPad * pad, GstCaps * caps)
307 GstVideoMixer2Pad *mixpad;
310 gint fps_n = 0, fps_d = 0;
311 gint par_n = 1, par_d = 1;
312 gboolean ret = FALSE;
315 GST_INFO_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, caps);
317 mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
318 mixpad = GST_VIDEO_MIXER2_PAD (pad);
320 if (!gst_video_format_parse_caps (caps, &fmt, &width, &height) ||
321 !gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d)) {
322 GST_ERROR_OBJECT (pad, "Failed to parse caps");
326 s = gst_caps_get_structure (caps, 0);
327 if (gst_structure_has_field (s, "framerate")
328 && !gst_video_parse_caps_framerate (caps, &fps_n, &fps_d)) {
329 GST_ERROR_OBJECT (pad, "Failed to parse caps");
333 GST_VIDEO_MIXER2_LOCK (mix);
334 if (mix->format != GST_VIDEO_FORMAT_UNKNOWN) {
335 if (mix->format != fmt || mix->par_n != par_n || mix->par_d != par_d) {
336 GST_ERROR_OBJECT (pad, "Caps not compatible with other pads' caps");
337 GST_VIDEO_MIXER2_UNLOCK (mix);
345 mixpad->fps_n = fps_n;
346 mixpad->fps_d = fps_d;
347 mixpad->width = width;
348 mixpad->height = height;
350 GST_VIDEO_MIXER2_UNLOCK (mix);
352 ret = gst_videomixer2_update_src_caps (mix);
355 gst_object_unref (mix);
361 gst_videomixer2_pad_sink_getcaps (GstPad * pad)
364 GstVideoMixer2Pad *mixpad;
369 mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
370 mixpad = GST_VIDEO_MIXER2_PAD (pad);
372 srccaps = gst_pad_get_fixed_caps_func (GST_PAD (mix->srcpad));
373 srccaps = gst_caps_make_writable (srccaps);
375 n = gst_caps_get_size (srccaps);
376 for (i = 0; i < n; i++) {
377 s = gst_caps_get_structure (srccaps, i);
378 gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
379 "height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
380 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
381 if (!gst_structure_has_field (s, "pixel-aspect-ratio"))
382 gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
386 GST_DEBUG_OBJECT (pad, "Returning %" GST_PTR_FORMAT, srccaps);
392 gst_videomixer2_pad_sink_acceptcaps (GstPad * pad, GstCaps * caps)
396 GstCaps *accepted_caps;
400 mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
401 GST_DEBUG_OBJECT (pad, "%" GST_PTR_FORMAT, caps);
403 accepted_caps = gst_pad_get_fixed_caps_func (GST_PAD (mix->srcpad));
404 accepted_caps = gst_caps_make_writable (accepted_caps);
405 GST_LOG_OBJECT (pad, "src caps %" GST_PTR_FORMAT, accepted_caps);
407 n = gst_caps_get_size (accepted_caps);
408 for (i = 0; i < n; i++) {
409 s = gst_caps_get_structure (accepted_caps, i);
410 gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
411 "height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
412 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
413 if (!gst_structure_has_field (s, "pixel-aspect-ratio"))
414 gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
418 ret = gst_caps_can_intersect (caps, accepted_caps);
419 GST_INFO_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT, (ret ? "" : "not "),
421 GST_INFO_OBJECT (pad, "acceptable caps are %" GST_PTR_FORMAT, accepted_caps);
423 gst_caps_unref (accepted_caps);
425 gst_object_unref (mix);
430 gst_videomixer2_pad_get_property (GObject * object, guint prop_id,
431 GValue * value, GParamSpec * pspec)
433 GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (object);
436 case PROP_PAD_ZORDER:
437 g_value_set_uint (value, pad->zorder);
440 g_value_set_int (value, pad->xpos);
443 g_value_set_int (value, pad->ypos);
446 g_value_set_double (value, pad->alpha);
449 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
455 pad_zorder_compare (const GstVideoMixer2Pad * pad1,
456 const GstVideoMixer2Pad * pad2)
458 return pad1->zorder - pad2->zorder;
462 gst_videomixer2_pad_set_property (GObject * object, guint prop_id,
463 const GValue * value, GParamSpec * pspec)
465 GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (object);
466 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (GST_PAD (pad)));
469 case PROP_PAD_ZORDER:
470 GST_VIDEO_MIXER2_LOCK (mix);
471 pad->zorder = g_value_get_uint (value);
473 mix->sinkpads = g_slist_sort (mix->sinkpads,
474 (GCompareFunc) pad_zorder_compare);
475 GST_VIDEO_MIXER2_UNLOCK (mix);
478 pad->xpos = g_value_get_int (value);
481 pad->ypos = g_value_get_int (value);
484 pad->alpha = g_value_get_double (value);
487 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
491 gst_object_unref (mix);
495 gst_videomixer2_pad_class_init (GstVideoMixer2PadClass * klass)
497 GObjectClass *gobject_class = (GObjectClass *) klass;
499 gobject_class->set_property = gst_videomixer2_pad_set_property;
500 gobject_class->get_property = gst_videomixer2_pad_get_property;
502 g_object_class_install_property (gobject_class, PROP_PAD_ZORDER,
503 g_param_spec_uint ("zorder", "Z-Order", "Z Order of the picture",
504 0, 10000, DEFAULT_PAD_ZORDER,
505 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
506 g_object_class_install_property (gobject_class, PROP_PAD_XPOS,
507 g_param_spec_int ("xpos", "X Position", "X Position of the picture",
508 G_MININT, G_MAXINT, DEFAULT_PAD_XPOS,
509 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
510 g_object_class_install_property (gobject_class, PROP_PAD_YPOS,
511 g_param_spec_int ("ypos", "Y Position", "Y Position of the picture",
512 G_MININT, G_MAXINT, DEFAULT_PAD_YPOS,
513 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
514 g_object_class_install_property (gobject_class, PROP_PAD_ALPHA,
515 g_param_spec_double ("alpha", "Alpha", "Alpha of the picture", 0.0, 1.0,
517 G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
521 gst_videomixer2_pad_init (GstVideoMixer2Pad * mixerpad)
523 /* setup some pad functions */
524 gst_pad_set_setcaps_function (GST_PAD (mixerpad),
525 gst_videomixer2_pad_sink_setcaps);
526 gst_pad_set_acceptcaps_function (GST_PAD (mixerpad),
527 GST_DEBUG_FUNCPTR (gst_videomixer2_pad_sink_acceptcaps));
528 gst_pad_set_getcaps_function (GST_PAD (mixerpad),
529 gst_videomixer2_pad_sink_getcaps);
531 mixerpad->zorder = DEFAULT_PAD_ZORDER;
532 mixerpad->xpos = DEFAULT_PAD_XPOS;
533 mixerpad->ypos = DEFAULT_PAD_YPOS;
534 mixerpad->alpha = DEFAULT_PAD_ALPHA;
538 #define DEFAULT_BACKGROUND VIDEO_MIXER2_BACKGROUND_CHECKER
545 #define GST_TYPE_VIDEO_MIXER2_BACKGROUND (gst_videomixer2_background_get_type())
547 gst_videomixer2_background_get_type (void)
549 static GType video_mixer_background_type = 0;
551 static const GEnumValue video_mixer_background[] = {
552 {VIDEO_MIXER2_BACKGROUND_CHECKER, "Checker pattern", "checker"},
553 {VIDEO_MIXER2_BACKGROUND_BLACK, "Black", "black"},
554 {VIDEO_MIXER2_BACKGROUND_WHITE, "White", "white"},
555 {VIDEO_MIXER2_BACKGROUND_TRANSPARENT,
556 "Transparent Background to enable further mixing", "transparent"},
560 if (!video_mixer_background_type) {
561 video_mixer_background_type =
562 g_enum_register_static ("GstVideoMixer2Background",
563 video_mixer_background);
565 return video_mixer_background_type;
569 GST_BOILERPLATE_FULL (GstVideoMixer2, gst_videomixer2, GstElement,
570 GST_TYPE_ELEMENT, _do_init);
573 gst_videomixer2_update_qos (GstVideoMixer2 * mix, gdouble proportion,
574 GstClockTimeDiff diff, GstClockTime timestamp)
576 GST_DEBUG_OBJECT (mix,
577 "Updating QoS: proportion %lf, diff %s%" GST_TIME_FORMAT ", timestamp %"
578 GST_TIME_FORMAT, proportion, (diff < 0) ? "-" : "",
579 GST_TIME_ARGS (ABS (diff)), GST_TIME_ARGS (timestamp));
581 GST_OBJECT_LOCK (mix);
582 mix->proportion = proportion;
583 if (G_LIKELY (timestamp != GST_CLOCK_TIME_NONE)) {
584 if (G_UNLIKELY (diff > 0))
586 timestamp + 2 * diff + gst_util_uint64_scale_int (GST_SECOND,
587 mix->fps_d, mix->fps_n);
589 mix->earliest_time = timestamp + diff;
591 mix->earliest_time = GST_CLOCK_TIME_NONE;
593 GST_OBJECT_UNLOCK (mix);
597 gst_videomixer2_reset_qos (GstVideoMixer2 * mix)
599 gst_videomixer2_update_qos (mix, 0.5, 0, GST_CLOCK_TIME_NONE);
600 mix->qos_processed = mix->qos_dropped = 0;
604 gst_videomixer2_read_qos (GstVideoMixer2 * mix, gdouble * proportion,
607 GST_OBJECT_LOCK (mix);
608 *proportion = mix->proportion;
609 *time = mix->earliest_time;
610 GST_OBJECT_UNLOCK (mix);
614 gst_videomixer2_reset (GstVideoMixer2 * mix)
618 mix->format = GST_VIDEO_FORMAT_UNKNOWN;
619 mix->width = mix->height = 0;
620 mix->fps_n = mix->fps_d = 0;
621 mix->par_n = mix->par_d = 0;
625 gst_segment_init (&mix->segment, GST_FORMAT_TIME);
626 mix->segment.last_stop = -1;
628 gst_videomixer2_reset_qos (mix);
630 for (l = mix->sinkpads; l; l = l->next) {
631 GstVideoMixer2Pad *p = l->data;
632 GstVideoMixer2Collect *mixcol = p->mixcol;
634 gst_buffer_replace (&mixcol->buffer, NULL);
635 mixcol->start_time = -1;
636 mixcol->end_time = -1;
638 p->fps_n = p->fps_d = 0;
639 p->width = p->height = 0;
642 mix->newseg_pending = TRUE;
643 mix->flush_stop_pending = FALSE;
647 * 0 == need more data
652 gst_videomixer2_fill_queues (GstVideoMixer2 * mix,
653 GstClockTime output_start_time, GstClockTime output_end_time)
657 gboolean need_more_data = FALSE;
659 for (l = mix->sinkpads; l; l = l->next) {
660 GstVideoMixer2Pad *pad = l->data;
661 GstVideoMixer2Collect *mixcol = pad->mixcol;
662 GstSegment *segment = &pad->mixcol->collect.segment;
665 buf = gst_collect_pads2_peek (mix->collect, &mixcol->collect);
667 GstClockTime start_time, end_time;
669 start_time = GST_BUFFER_TIMESTAMP (buf);
670 if (start_time == -1) {
671 gst_buffer_unref (buf);
672 GST_ERROR_OBJECT (pad, "Need timestamped buffers!");
676 /* FIXME: Make all this work with negative rates */
678 if ((mixcol->buffer && start_time < GST_BUFFER_TIMESTAMP (mixcol->buffer))
680 && start_time < GST_BUFFER_TIMESTAMP (mixcol->queued))) {
681 GST_WARNING_OBJECT (pad, "Buffer from the past, dropping");
682 gst_buffer_unref (buf);
683 buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
684 gst_buffer_unref (buf);
685 need_more_data = TRUE;
689 if (mixcol->queued) {
690 end_time = start_time - GST_BUFFER_TIMESTAMP (mixcol->queued);
691 start_time = GST_BUFFER_TIMESTAMP (mixcol->queued);
692 gst_buffer_unref (buf);
693 buf = gst_buffer_ref (mixcol->queued);
695 end_time = GST_BUFFER_DURATION (buf);
697 if (end_time == -1) {
698 mixcol->queued = buf;
699 need_more_data = TRUE;
704 g_assert (start_time != -1 && end_time != -1);
705 end_time += start_time; /* convert from duration to position */
707 if (mixcol->end_time != -1 && mixcol->end_time > end_time) {
708 GST_WARNING_OBJECT (pad, "Buffer from the past, dropping");
709 if (buf == mixcol->queued) {
710 gst_buffer_unref (buf);
711 gst_buffer_replace (&mixcol->queued, NULL);
713 gst_buffer_unref (buf);
714 buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
715 gst_buffer_unref (buf);
718 need_more_data = TRUE;
722 /* Check if it's inside the segment */
723 if (start_time >= segment->stop || end_time < segment->start) {
724 GST_DEBUG_OBJECT (pad, "Buffer outside the segment");
726 if (buf == mixcol->queued) {
727 gst_buffer_unref (buf);
728 gst_buffer_replace (&mixcol->queued, NULL);
730 gst_buffer_unref (buf);
731 buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
732 gst_buffer_unref (buf);
735 need_more_data = TRUE;
739 /* Clip to segment and convert to running time */
740 start_time = MAX (start_time, segment->start);
741 if (segment->stop != -1)
742 end_time = MIN (end_time, segment->stop);
744 gst_segment_to_running_time (segment, GST_FORMAT_TIME, start_time);
746 gst_segment_to_running_time (segment, GST_FORMAT_TIME, end_time);
747 g_assert (start_time != -1 && end_time != -1);
749 /* Convert to the output segment rate */
750 if (mix->segment.abs_rate != 1.0) {
751 start_time *= mix->segment.abs_rate;
752 end_time *= mix->segment.abs_rate;
755 if (end_time >= output_start_time && start_time < output_end_time) {
756 GST_DEBUG_OBJECT (pad,
757 "Taking new buffer with start time %" GST_TIME_FORMAT,
758 GST_TIME_ARGS (start_time));
759 gst_buffer_replace (&mixcol->buffer, buf);
760 mixcol->start_time = start_time;
761 mixcol->end_time = end_time;
763 if (buf == mixcol->queued) {
764 gst_buffer_unref (buf);
765 gst_buffer_replace (mixcol->queued, NULL);
767 gst_buffer_unref (buf);
768 buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
769 gst_buffer_unref (buf);
772 } else if (start_time >= output_end_time) {
773 GST_DEBUG_OBJECT (pad, "Keeping buffer until %" GST_TIME_FORMAT,
774 GST_TIME_ARGS (start_time));
777 GST_DEBUG_OBJECT (pad, "Too old buffer -- dropping");
778 if (buf == mixcol->queued) {
779 gst_buffer_unref (buf);
780 gst_buffer_replace (&mixcol->queued, NULL);
782 gst_buffer_unref (buf);
783 buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
784 gst_buffer_unref (buf);
787 need_more_data = TRUE;
791 if (mixcol->end_time != -1) {
792 if (mixcol->end_time < output_start_time) {
793 gst_buffer_replace (&mixcol->buffer, NULL);
794 mixcol->start_time = mixcol->end_time = -1;
795 if (!GST_COLLECT_PADS2_STATE_IS_SET (mixcol,
796 GST_COLLECT_PADS2_STATE_EOS))
797 need_more_data = TRUE;
814 gst_videomixer2_blend_buffers (GstVideoMixer2 * mix,
815 GstClockTime output_start_time, GstClockTime output_end_time,
821 BlendFunction composite;
823 outsize = gst_video_format_get_size (mix->format, mix->width, mix->height);
824 ret = gst_pad_alloc_buffer_and_set_caps (mix->srcpad, GST_BUFFER_OFFSET_NONE,
825 outsize, GST_PAD_CAPS (mix->srcpad), outbuf);
826 if (ret != GST_FLOW_OK)
829 GST_BUFFER_TIMESTAMP (*outbuf) = output_start_time;
830 GST_BUFFER_DURATION (*outbuf) = output_end_time - output_start_time;
832 /* default to blending */
833 composite = mix->blend;
834 switch (mix->background) {
835 case VIDEO_MIXER2_BACKGROUND_CHECKER:
836 mix->fill_checker (GST_BUFFER_DATA (*outbuf), mix->width, mix->height);
838 case VIDEO_MIXER2_BACKGROUND_BLACK:
839 mix->fill_color (GST_BUFFER_DATA (*outbuf), mix->width,
840 mix->height, 16, 128, 128);
842 case VIDEO_MIXER2_BACKGROUND_WHITE:
843 mix->fill_color (GST_BUFFER_DATA (*outbuf), mix->width,
844 mix->height, 240, 128, 128);
846 case VIDEO_MIXER2_BACKGROUND_TRANSPARENT:
847 orc_memset (GST_BUFFER_DATA (*outbuf), 0,
848 gst_video_format_get_row_stride (mix->format, 0,
849 mix->width) * mix->height);
850 /* use overlay to keep background transparent */
851 composite = mix->overlay;
855 for (l = mix->sinkpads; l; l = l->next) {
856 GstVideoMixer2Pad *pad = l->data;
857 GstVideoMixer2Collect *mixcol = pad->mixcol;
859 if (mixcol->buffer != NULL) {
860 GstClockTime timestamp;
864 seg = &mixcol->collect.segment;
866 timestamp = GST_BUFFER_TIMESTAMP (mixcol->buffer);
869 gst_segment_to_stream_time (seg, GST_FORMAT_TIME, timestamp);
871 /* sync object properties on stream time */
872 if (GST_CLOCK_TIME_IS_VALID (stream_time))
873 gst_object_sync_values (G_OBJECT (pad), stream_time);
875 composite (GST_BUFFER_DATA (mixcol->buffer),
876 pad->xpos, pad->ypos, pad->width, pad->height, pad->alpha,
877 GST_BUFFER_DATA (*outbuf), mix->width, mix->height);
884 /* Perform qos calculations before processing the next frame. Returns TRUE if
885 * the frame should be processed, FALSE if the frame can be dropped entirely */
887 gst_videomixer2_do_qos (GstVideoMixer2 * mix, GstClockTime timestamp)
889 GstClockTime qostime, earliest_time;
893 /* no timestamp, can't do QoS => process frame */
894 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp))) {
895 GST_LOG_OBJECT (mix, "invalid timestamp, can't do QoS, process frame");
899 /* get latest QoS observation values */
900 gst_videomixer2_read_qos (mix, &proportion, &earliest_time);
902 /* skip qos if we have no observation (yet) => process frame */
903 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (earliest_time))) {
904 GST_LOG_OBJECT (mix, "no observation yet, process frame");
908 /* qos is done on running time */
910 gst_segment_to_running_time (&mix->segment, GST_FORMAT_TIME, timestamp);
912 /* see how our next timestamp relates to the latest qos timestamp */
913 GST_LOG_OBJECT (mix, "qostime %" GST_TIME_FORMAT ", earliest %"
914 GST_TIME_FORMAT, GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time));
916 jitter = GST_CLOCK_DIFF (qostime, earliest_time);
917 if (qostime != GST_CLOCK_TIME_NONE && jitter > 0) {
918 GST_DEBUG_OBJECT (mix, "we are late, drop frame");
922 GST_LOG_OBJECT (mix, "process frame");
927 gst_videomixer2_collected (GstCollectPads2 * pads, GstVideoMixer2 * mix)
930 GstClockTime output_start_time, output_end_time;
931 GstBuffer *outbuf = NULL;
935 /* If we're not negotiated yet... */
936 if (mix->format == GST_VIDEO_FORMAT_UNKNOWN)
937 return GST_FLOW_NOT_NEGOTIATED;
939 if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE, FALSE)) {
940 GST_DEBUG_OBJECT (mix, "pending flush stop");
941 gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop ());
944 GST_VIDEO_MIXER2_LOCK (mix);
946 if (mix->newseg_pending) {
947 GST_DEBUG_OBJECT (mix, "Sending NEWSEGMENT event");
948 if (!gst_pad_push_event (mix->srcpad, gst_event_new_new_segment_full (FALSE,
949 mix->segment.rate, mix->segment.applied_rate,
950 mix->segment.format, mix->segment.start, mix->segment.stop,
951 mix->segment.time))) {
952 ret = GST_FLOW_ERROR;
955 mix->newseg_pending = FALSE;
958 if (mix->segment.last_stop == -1)
959 output_start_time = mix->segment.start;
961 output_start_time = mix->segment.last_stop;
963 if (output_start_time >= mix->segment.stop) {
964 GST_DEBUG_OBJECT (mix, "Segment done");
965 gst_pad_push_event (mix->srcpad, gst_event_new_eos ());
966 ret = GST_FLOW_UNEXPECTED;
971 mix->ts_offset + gst_util_uint64_scale (mix->nframes + 1,
972 GST_SECOND * mix->fps_d, mix->fps_n);
973 if (mix->segment.stop != -1)
974 output_end_time = MIN (output_end_time, mix->segment.stop);
976 res = gst_videomixer2_fill_queues (mix, output_start_time, output_end_time);
979 GST_DEBUG_OBJECT (mix, "Need more data for decisions");
982 } else if (res == -1) {
983 GST_DEBUG_OBJECT (mix, "All sinkpads are EOS -- forwarding");
984 gst_pad_push_event (mix->srcpad, gst_event_new_eos ());
985 ret = GST_FLOW_UNEXPECTED;
987 } else if (res == -2) {
988 GST_ERROR_OBJECT (mix, "Error collecting buffers");
989 ret = GST_FLOW_ERROR;
993 jitter = gst_videomixer2_do_qos (mix, output_start_time);
996 gst_videomixer2_blend_buffers (mix, output_start_time,
997 output_end_time, &outbuf);
998 mix->qos_processed++;
1006 gst_message_new_qos (GST_OBJECT_CAST (mix), FALSE,
1007 gst_segment_to_running_time (&mix->segment, GST_FORMAT_TIME,
1008 output_start_time), gst_segment_to_stream_time (&mix->segment,
1009 GST_FORMAT_TIME, output_start_time), output_start_time,
1010 output_end_time - output_start_time);
1011 gst_message_set_qos_values (msg, jitter, mix->proportion, 1000000);
1012 gst_message_set_qos_stats (msg, GST_FORMAT_BUFFERS, mix->qos_processed,
1014 gst_element_post_message (GST_ELEMENT_CAST (mix), msg);
1019 gst_segment_set_last_stop (&mix->segment, GST_FORMAT_TIME, output_end_time);
1022 GST_VIDEO_MIXER2_UNLOCK (mix);
1024 GST_LOG_OBJECT (mix,
1025 "Pushing buffer with ts %" GST_TIME_FORMAT " and duration %"
1026 GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
1027 GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
1028 ret = gst_pad_push (mix->srcpad, outbuf);
1030 GST_VIDEO_MIXER2_LOCK (mix);
1033 GST_VIDEO_MIXER2_UNLOCK (mix);
1039 gst_videomixer2_src_getcaps (GstPad * pad)
1041 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
1046 if (mix->format != GST_VIDEO_FORMAT_UNKNOWN) {
1047 caps = gst_caps_copy (GST_PAD_CAPS (mix->srcpad));
1049 caps = gst_caps_copy (gst_pad_get_pad_template_caps (mix->srcpad));
1052 n = gst_caps_get_size (caps) - 1;
1053 for (; n >= 0; n--) {
1054 s = gst_caps_get_structure (caps, n);
1055 gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
1056 "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
1057 if (mix->fps_d != 0) {
1058 gst_structure_set (s,
1059 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
1063 gst_object_unref (mix);
1069 gst_videomixer2_query_duration (GstVideoMixer2 * mix, GstQuery * query)
1078 gst_query_parse_duration (query, &format, NULL);
1084 /* Take maximum of all durations */
1085 it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
1087 GstIteratorResult ires;
1090 ires = gst_iterator_next (it, &item);
1092 case GST_ITERATOR_DONE:
1095 case GST_ITERATOR_OK:
1097 GstPad *pad = GST_PAD_CAST (item);
1100 /* ask sink peer for duration */
1101 res &= gst_pad_query_peer_duration (pad, &format, &duration);
1102 /* take max from all valid return values */
1104 /* valid unknown length, stop searching */
1105 if (duration == -1) {
1109 /* else see if bigger than current max */
1110 else if (duration > max)
1113 gst_object_unref (pad);
1116 case GST_ITERATOR_RESYNC:
1119 gst_iterator_resync (it);
1127 gst_iterator_free (it);
1130 /* and store the max */
1131 GST_DEBUG_OBJECT (mix, "Total duration in format %s: %"
1132 GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (max));
1133 gst_query_set_duration (query, format, max);
1140 gst_videomixer2_query_latency (GstVideoMixer2 * mix, GstQuery * query)
1142 GstClockTime min, max;
1152 max = GST_CLOCK_TIME_NONE;
1154 /* Take maximum of all latency values */
1155 it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
1157 GstIteratorResult ires;
1160 ires = gst_iterator_next (it, &item);
1162 case GST_ITERATOR_DONE:
1165 case GST_ITERATOR_OK:
1167 GstPad *pad = GST_PAD_CAST (item);
1168 GstQuery *peerquery;
1169 GstClockTime min_cur, max_cur;
1172 peerquery = gst_query_new_latency ();
1174 /* Ask peer for latency */
1175 res &= gst_pad_peer_query (pad, peerquery);
1177 /* take max from all valid return values */
1179 gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur);
1184 if (max_cur != GST_CLOCK_TIME_NONE &&
1185 ((max != GST_CLOCK_TIME_NONE && max_cur > max) ||
1186 (max == GST_CLOCK_TIME_NONE)))
1189 live = live || live_cur;
1192 gst_query_unref (peerquery);
1193 gst_object_unref (pad);
1196 case GST_ITERATOR_RESYNC:
1199 max = GST_CLOCK_TIME_NONE;
1201 gst_iterator_resync (it);
1209 gst_iterator_free (it);
1212 /* store the results */
1213 GST_DEBUG_OBJECT (mix, "Calculated total latency: live %s, min %"
1214 GST_TIME_FORMAT ", max %" GST_TIME_FORMAT,
1215 (live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max));
1216 gst_query_set_latency (query, live, min, max);
1223 gst_videomixer2_src_query (GstPad * pad, GstQuery * query)
1225 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
1226 gboolean res = FALSE;
1228 switch (GST_QUERY_TYPE (query)) {
1229 case GST_QUERY_POSITION:
1233 gst_query_parse_position (query, &format, NULL);
1236 case GST_FORMAT_TIME:
1237 gst_query_set_position (query, format,
1238 gst_segment_to_stream_time (&mix->segment, GST_FORMAT_TIME,
1239 mix->segment.last_stop));
1247 case GST_QUERY_DURATION:
1248 res = gst_videomixer2_query_duration (mix, query);
1250 case GST_QUERY_LATENCY:
1251 res = gst_videomixer2_query_latency (mix, query);
1254 /* FIXME, needs a custom query handler because we have multiple
1257 gst_query_unref (query);
1261 gst_object_unref (mix);
1266 gst_videomixer2_src_event (GstPad * pad, GstEvent * event)
1268 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
1271 switch (GST_EVENT_TYPE (event)) {
1272 case GST_EVENT_QOS:{
1273 GstClockTimeDiff diff;
1274 GstClockTime timestamp;
1277 gst_event_parse_qos (event, &proportion, &diff, ×tamp);
1279 gst_videomixer2_update_qos (mix, proportion, diff, timestamp);
1281 result = gst_videomixer2_push_sink_event (mix, event);
1284 case GST_EVENT_SEEK:
1289 GstSeekType start_type, stop_type;
1294 /* parse the seek parameters */
1295 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1296 &start, &stop_type, &stop);
1299 GST_ERROR_OBJECT (mix, "Negative rates not supported yet");
1301 gst_event_unref (event);
1305 GST_DEBUG_OBJECT (mix, "Handling SEEK event");
1307 /* check if we are flushing */
1308 if (flags & GST_SEEK_FLAG_FLUSH) {
1309 /* flushing seek, start flush downstream, the flush will be done
1310 * when all pads received a FLUSH_STOP. */
1311 gst_pad_push_event (mix->srcpad, gst_event_new_flush_start ());
1313 /* make sure we accept nothing anymore and return WRONG_STATE */
1314 gst_collect_pads2_set_flushing (mix->collect, TRUE);
1317 /* now wait for the collected to be finished and mark a new
1319 GST_COLLECT_PADS2_STREAM_LOCK (mix->collect);
1321 abs_rate = ABS (rate);
1323 GST_VIDEO_MIXER2_LOCK (mix);
1324 for (l = mix->sinkpads; l; l = l->next) {
1325 GstVideoMixer2Pad *p = l->data;
1327 if (flags & GST_SEEK_FLAG_FLUSH) {
1328 gst_buffer_replace (&p->mixcol->buffer, NULL);
1329 p->mixcol->start_time = p->mixcol->end_time = -1;
1333 /* Convert to the output segment rate */
1334 if (mix->segment.abs_rate != abs_rate) {
1335 if (mix->segment.abs_rate != 1.0 && p->mixcol->buffer) {
1336 p->mixcol->start_time /= mix->segment.abs_rate;
1337 p->mixcol->end_time /= mix->segment.abs_rate;
1339 if (abs_rate != 1.0 && p->mixcol->buffer) {
1340 p->mixcol->start_time *= abs_rate;
1341 p->mixcol->end_time *= abs_rate;
1345 GST_VIDEO_MIXER2_UNLOCK (mix);
1347 gst_segment_set_seek (&mix->segment, rate, fmt, flags, start_type, start,
1348 stop_type, stop, NULL);
1349 mix->segment.last_stop = -1;
1352 mix->newseg_pending = TRUE;
1354 if (flags & GST_SEEK_FLAG_FLUSH) {
1355 gst_collect_pads2_set_flushing (mix->collect, FALSE);
1357 /* we can't send FLUSH_STOP here since upstream could start pushing data
1358 * after we unlock mix->collect.
1359 * We set flush_stop_pending to TRUE instead and send FLUSH_STOP after
1360 * forwarding the seek upstream or from gst_videomixer_collected,
1361 * whichever happens first.
1363 mix->flush_stop_pending = TRUE;
1366 GST_COLLECT_PADS2_STREAM_UNLOCK (mix->collect);
1368 gst_videomixer2_reset_qos (mix);
1370 result = gst_videomixer2_push_sink_event (mix, event);
1372 if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE,
1374 GST_DEBUG_OBJECT (mix, "pending flush stop");
1375 gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop ());
1380 case GST_EVENT_NAVIGATION:
1381 /* navigation is rather pointless. */
1383 gst_event_unref (event);
1386 /* just forward the rest for now */
1387 result = gst_videomixer2_push_sink_event (mix, event);
1390 gst_object_unref (mix);
1396 gst_videomixer2_src_setcaps (GstPad * pad, GstCaps * caps)
1398 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent_element (pad));
1399 gboolean ret = FALSE;
1405 GST_INFO_OBJECT (pad, "set src caps: %" GST_PTR_FORMAT, caps);
1408 mix->overlay = NULL;
1409 mix->fill_checker = NULL;
1410 mix->fill_color = NULL;
1412 if (!gst_video_format_parse_caps (caps, &fmt, &width, &height) ||
1413 !gst_video_parse_caps_framerate (caps, &fps_n, &fps_d) ||
1414 !gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d))
1417 GST_VIDEO_MIXER2_LOCK (mix);
1419 if (mix->fps_n != fps_n || mix->fps_d != fps_d) {
1420 if (mix->segment.last_stop != -1) {
1421 mix->ts_offset = mix->segment.last_stop - mix->segment.start;
1424 gst_videomixer2_reset_qos (mix);
1429 mix->height = height;
1435 switch (mix->format) {
1436 case GST_VIDEO_FORMAT_AYUV:
1437 mix->blend = gst_video_mixer_blend_ayuv;
1438 mix->overlay = gst_video_mixer_overlay_ayuv;
1439 mix->fill_checker = gst_video_mixer_fill_checker_ayuv;
1440 mix->fill_color = gst_video_mixer_fill_color_ayuv;
1443 case GST_VIDEO_FORMAT_ARGB:
1444 mix->blend = gst_video_mixer_blend_argb;
1445 mix->overlay = gst_video_mixer_overlay_argb;
1446 mix->fill_checker = gst_video_mixer_fill_checker_argb;
1447 mix->fill_color = gst_video_mixer_fill_color_argb;
1450 case GST_VIDEO_FORMAT_BGRA:
1451 mix->blend = gst_video_mixer_blend_bgra;
1452 mix->overlay = gst_video_mixer_overlay_bgra;
1453 mix->fill_checker = gst_video_mixer_fill_checker_bgra;
1454 mix->fill_color = gst_video_mixer_fill_color_bgra;
1457 case GST_VIDEO_FORMAT_ABGR:
1458 mix->blend = gst_video_mixer_blend_abgr;
1459 mix->overlay = gst_video_mixer_overlay_abgr;
1460 mix->fill_checker = gst_video_mixer_fill_checker_abgr;
1461 mix->fill_color = gst_video_mixer_fill_color_abgr;
1464 case GST_VIDEO_FORMAT_RGBA:
1465 mix->blend = gst_video_mixer_blend_rgba;
1466 mix->overlay = gst_video_mixer_overlay_rgba;
1467 mix->fill_checker = gst_video_mixer_fill_checker_rgba;
1468 mix->fill_color = gst_video_mixer_fill_color_rgba;
1471 case GST_VIDEO_FORMAT_Y444:
1472 mix->blend = gst_video_mixer_blend_y444;
1473 mix->overlay = mix->blend;
1474 mix->fill_checker = gst_video_mixer_fill_checker_y444;
1475 mix->fill_color = gst_video_mixer_fill_color_y444;
1478 case GST_VIDEO_FORMAT_Y42B:
1479 mix->blend = gst_video_mixer_blend_y42b;
1480 mix->overlay = mix->blend;
1481 mix->fill_checker = gst_video_mixer_fill_checker_y42b;
1482 mix->fill_color = gst_video_mixer_fill_color_y42b;
1485 case GST_VIDEO_FORMAT_YUY2:
1486 mix->blend = gst_video_mixer_blend_yuy2;
1487 mix->overlay = mix->blend;
1488 mix->fill_checker = gst_video_mixer_fill_checker_yuy2;
1489 mix->fill_color = gst_video_mixer_fill_color_yuy2;
1492 case GST_VIDEO_FORMAT_UYVY:
1493 mix->blend = gst_video_mixer_blend_uyvy;
1494 mix->overlay = mix->blend;
1495 mix->fill_checker = gst_video_mixer_fill_checker_uyvy;
1496 mix->fill_color = gst_video_mixer_fill_color_uyvy;
1499 case GST_VIDEO_FORMAT_YVYU:
1500 mix->blend = gst_video_mixer_blend_yvyu;
1501 mix->overlay = mix->blend;
1502 mix->fill_checker = gst_video_mixer_fill_checker_yvyu;
1503 mix->fill_color = gst_video_mixer_fill_color_yvyu;
1506 case GST_VIDEO_FORMAT_I420:
1507 mix->blend = gst_video_mixer_blend_i420;
1508 mix->overlay = mix->blend;
1509 mix->fill_checker = gst_video_mixer_fill_checker_i420;
1510 mix->fill_color = gst_video_mixer_fill_color_i420;
1513 case GST_VIDEO_FORMAT_YV12:
1514 mix->blend = gst_video_mixer_blend_yv12;
1515 mix->overlay = mix->blend;
1516 mix->fill_checker = gst_video_mixer_fill_checker_yv12;
1517 mix->fill_color = gst_video_mixer_fill_color_yv12;
1520 case GST_VIDEO_FORMAT_Y41B:
1521 mix->blend = gst_video_mixer_blend_y41b;
1522 mix->overlay = mix->blend;
1523 mix->fill_checker = gst_video_mixer_fill_checker_y41b;
1524 mix->fill_color = gst_video_mixer_fill_color_y41b;
1527 case GST_VIDEO_FORMAT_RGB:
1528 mix->blend = gst_video_mixer_blend_rgb;
1529 mix->overlay = mix->blend;
1530 mix->fill_checker = gst_video_mixer_fill_checker_rgb;
1531 mix->fill_color = gst_video_mixer_fill_color_rgb;
1534 case GST_VIDEO_FORMAT_BGR:
1535 mix->blend = gst_video_mixer_blend_bgr;
1536 mix->overlay = mix->blend;
1537 mix->fill_checker = gst_video_mixer_fill_checker_bgr;
1538 mix->fill_color = gst_video_mixer_fill_color_bgr;
1541 case GST_VIDEO_FORMAT_xRGB:
1542 mix->blend = gst_video_mixer_blend_xrgb;
1543 mix->overlay = mix->blend;
1544 mix->fill_checker = gst_video_mixer_fill_checker_xrgb;
1545 mix->fill_color = gst_video_mixer_fill_color_xrgb;
1548 case GST_VIDEO_FORMAT_xBGR:
1549 mix->blend = gst_video_mixer_blend_xbgr;
1550 mix->overlay = mix->blend;
1551 mix->fill_checker = gst_video_mixer_fill_checker_xbgr;
1552 mix->fill_color = gst_video_mixer_fill_color_xbgr;
1555 case GST_VIDEO_FORMAT_RGBx:
1556 mix->blend = gst_video_mixer_blend_rgbx;
1557 mix->overlay = mix->blend;
1558 mix->fill_checker = gst_video_mixer_fill_checker_rgbx;
1559 mix->fill_color = gst_video_mixer_fill_color_rgbx;
1562 case GST_VIDEO_FORMAT_BGRx:
1563 mix->blend = gst_video_mixer_blend_bgrx;
1564 mix->overlay = mix->blend;
1565 mix->fill_checker = gst_video_mixer_fill_checker_bgrx;
1566 mix->fill_color = gst_video_mixer_fill_color_bgrx;
1572 GST_VIDEO_MIXER2_UNLOCK (mix);
1575 gst_object_unref (mix);
1580 static GstFlowReturn
1581 gst_videomixer2_sink_prepare_buffer (GstCollectPads2 * pads,
1582 GstCollectData2 * data, GstBuffer * buf, GstVideoMixer2 * mix)
1584 GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (data->pad);
1585 GstVideoMixer2Collect *mixcol = pad->mixcol;
1586 GstClockTime start_time, end_time;
1589 start_time = GST_BUFFER_TIMESTAMP (buf);
1590 if (start_time == -1) {
1591 GST_ERROR_OBJECT (pad, "Timestamped buffers required!");
1592 return GST_FLOW_ERROR;
1595 end_time = GST_BUFFER_DURATION (buf);
1597 end_time = gst_util_uint64_scale_int (GST_SECOND, pad->fps_d, pad->fps_n);
1601 start_time = MAX (start_time, mixcol->collect.segment.start);
1603 gst_segment_to_running_time (&mixcol->collect.segment,
1604 GST_FORMAT_TIME, start_time);
1606 end_time += GST_BUFFER_TIMESTAMP (buf);
1607 if (mixcol->collect.segment.stop != -1)
1608 end_time = MIN (end_time, mixcol->collect.segment.stop);
1610 gst_segment_to_running_time (&mixcol->collect.segment,
1611 GST_FORMAT_TIME, end_time);
1613 /* Convert to the output segment rate */
1614 if (mix->segment.abs_rate != 1.0) {
1615 start_time *= mix->segment.abs_rate;
1616 end_time *= mix->segment.abs_rate;
1619 last_stop = mix->segment.last_stop;
1620 if (mix->segment.last_stop == -1)
1621 last_stop = mix->segment.start;
1623 if (mixcol->buffer != NULL && end_time < mixcol->end_time) {
1624 return GST_COLLECT_PADS2_FLOW_DROP;
1631 gst_videomixer2_sink_event (GstCollectPads2 * pads, GstCollectData2 * cdata,
1632 GstEvent * event, GstVideoMixer2 * mix)
1634 GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (cdata->pad);
1635 gboolean ret = TRUE;
1637 GST_DEBUG_OBJECT (pad, "Got %s event on pad %s:%s",
1638 GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad));
1640 /* return FALSE => event will be forwarded */
1641 switch (GST_EVENT_TYPE (event)) {
1642 case GST_EVENT_NEWSEGMENT:{
1644 gst_event_parse_new_segment (event, NULL, NULL, &fmt, NULL, NULL, NULL);
1646 g_assert (fmt == GST_FORMAT_TIME);
1647 /* eat NEWSEGMENT events, collectpads2 unrefs the event */
1651 case GST_EVENT_FLUSH_STOP:
1652 mix->newseg_pending = TRUE;
1653 mix->flush_stop_pending = FALSE;
1654 gst_videomixer2_reset_qos (mix);
1655 gst_buffer_replace (&pad->mixcol->buffer, NULL);
1656 pad->mixcol->start_time = -1;
1657 pad->mixcol->end_time = -1;
1659 gst_segment_init (&mix->segment, GST_FORMAT_TIME);
1660 mix->segment.last_stop = -1;
1664 gst_pad_push_event (mix->srcpad, event);
1667 gst_pad_push_event (mix->srcpad, event);
1675 forward_event_func (GstPad * pad, GValue * ret, GstEvent * event)
1677 gst_event_ref (event);
1678 GST_LOG_OBJECT (pad, "About to send event %s", GST_EVENT_TYPE_NAME (event));
1679 if (!gst_pad_push_event (pad, event)) {
1680 g_value_set_boolean (ret, FALSE);
1681 GST_WARNING_OBJECT (pad, "Sending event %p (%s) failed.",
1682 event, GST_EVENT_TYPE_NAME (event));
1684 GST_LOG_OBJECT (pad, "Sent event %p (%s).",
1685 event, GST_EVENT_TYPE_NAME (event));
1687 gst_object_unref (pad);
1692 gst_videomixer2_push_sink_event (GstVideoMixer2 * mix, GstEvent * event)
1695 GValue vret = { 0 };
1697 GST_LOG_OBJECT (mix, "Forwarding event %p (%s)", event,
1698 GST_EVENT_TYPE_NAME (event));
1700 g_value_init (&vret, G_TYPE_BOOLEAN);
1701 g_value_set_boolean (&vret, TRUE);
1702 it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
1703 gst_iterator_fold (it, (GstIteratorFoldFunction) forward_event_func, &vret,
1705 gst_iterator_free (it);
1706 gst_event_unref (event);
1708 return g_value_get_boolean (&vret);
1711 /* GstElement vmethods */
1712 static GstStateChangeReturn
1713 gst_videomixer2_change_state (GstElement * element, GstStateChange transition)
1715 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (element);
1716 GstStateChangeReturn ret;
1718 switch (transition) {
1719 case GST_STATE_CHANGE_READY_TO_PAUSED:
1720 GST_LOG_OBJECT (mix, "starting collectpads");
1721 gst_collect_pads2_start (mix->collect);
1723 case GST_STATE_CHANGE_PAUSED_TO_READY:
1724 GST_LOG_OBJECT (mix, "stopping collectpads");
1725 gst_collect_pads2_stop (mix->collect);
1731 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1733 switch (transition) {
1734 case GST_STATE_CHANGE_PAUSED_TO_READY:
1735 gst_videomixer2_reset (mix);
1745 gst_videomixer2_request_new_pad (GstElement * element,
1746 GstPadTemplate * templ, const gchar * req_name)
1748 GstVideoMixer2 *mix;
1749 GstVideoMixer2Pad *mixpad;
1750 GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
1752 mix = GST_VIDEO_MIXER2 (element);
1754 if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) {
1757 GstVideoMixer2Collect *mixcol = NULL;
1759 GST_VIDEO_MIXER2_LOCK (mix);
1760 if (req_name == NULL || strlen (req_name) < 6
1761 || !g_str_has_prefix (req_name, "sink_")) {
1762 /* no name given when requesting the pad, use next available int */
1763 serial = mix->next_sinkpad++;
1765 /* parse serial number from requested padname */
1766 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
1767 if (serial >= mix->next_sinkpad)
1768 mix->next_sinkpad = serial + 1;
1770 /* create new pad with the name */
1771 name = g_strdup_printf ("sink_%d", serial);
1772 mixpad = g_object_new (GST_TYPE_VIDEO_MIXER2_PAD, "name", name, "direction",
1773 templ->direction, "template", templ, NULL);
1776 mixpad->zorder = mix->numpads;
1777 mixpad->xpos = DEFAULT_PAD_XPOS;
1778 mixpad->ypos = DEFAULT_PAD_YPOS;
1779 mixpad->alpha = DEFAULT_PAD_ALPHA;
1781 mixcol = (GstVideoMixer2Collect *)
1782 gst_collect_pads2_add_pad_full (mix->collect, GST_PAD (mixpad),
1783 sizeof (GstVideoMixer2Collect),
1784 (GstCollectData2DestroyNotify) gst_videomixer2_collect_free, TRUE);
1786 /* Keep track of each other */
1787 mixcol->mixpad = mixpad;
1788 mixpad->mixcol = mixcol;
1790 mixcol->start_time = -1;
1791 mixcol->end_time = -1;
1793 /* Keep an internal list of mixpads for zordering */
1794 mix->sinkpads = g_slist_append (mix->sinkpads, mixpad);
1796 GST_VIDEO_MIXER2_UNLOCK (mix);
1801 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (mixpad));
1803 /* add the pad to the element */
1804 gst_element_add_pad (element, GST_PAD (mixpad));
1805 gst_child_proxy_child_added (GST_OBJECT (mix), GST_OBJECT (mixpad));
1807 return GST_PAD (mixpad);
1811 gst_videomixer2_release_pad (GstElement * element, GstPad * pad)
1813 GstVideoMixer2 *mix = NULL;
1814 GstVideoMixer2Pad *mixpad;
1815 gboolean update_caps;
1817 mix = GST_VIDEO_MIXER2 (element);
1819 GST_VIDEO_MIXER2_LOCK (mix);
1820 if (G_UNLIKELY (g_slist_find (mix->sinkpads, pad) == NULL)) {
1821 g_warning ("Unknown pad %s", GST_PAD_NAME (pad));
1825 mixpad = GST_VIDEO_MIXER2_PAD (pad);
1827 mix->sinkpads = g_slist_remove (mix->sinkpads, pad);
1828 gst_child_proxy_child_removed (GST_OBJECT (mix), GST_OBJECT (mixpad));
1831 update_caps = mix->format != GST_VIDEO_FORMAT_UNKNOWN;
1832 GST_VIDEO_MIXER2_UNLOCK (mix);
1834 gst_collect_pads2_remove_pad (mix->collect, pad);
1837 gst_videomixer2_update_src_caps (mix);
1839 gst_element_remove_pad (element, pad);
1842 GST_VIDEO_MIXER2_UNLOCK (mix);
1845 /* GObject vmethods */
1847 gst_videomixer2_finalize (GObject * o)
1849 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (o);
1851 gst_object_unref (mix->collect);
1852 g_mutex_free (mix->lock);
1854 G_OBJECT_CLASS (parent_class)->finalize (o);
1858 gst_videomixer2_get_property (GObject * object,
1859 guint prop_id, GValue * value, GParamSpec * pspec)
1861 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (object);
1864 case PROP_BACKGROUND:
1865 g_value_set_enum (value, mix->background);
1868 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1874 gst_videomixer2_set_property (GObject * object,
1875 guint prop_id, const GValue * value, GParamSpec * pspec)
1877 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (object);
1880 case PROP_BACKGROUND:
1881 mix->background = g_value_get_enum (value);
1884 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1889 /* GstChildProxy implementation */
1891 gst_videomixer2_child_proxy_get_child_by_index (GstChildProxy * child_proxy,
1894 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (child_proxy);
1897 GST_VIDEO_MIXER2_LOCK (mix);
1898 if ((obj = g_slist_nth_data (mix->sinkpads, index)))
1899 gst_object_ref (obj);
1900 GST_VIDEO_MIXER2_UNLOCK (mix);
1905 gst_videomixer2_child_proxy_get_children_count (GstChildProxy * child_proxy)
1908 GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (child_proxy);
1910 GST_VIDEO_MIXER2_LOCK (mix);
1911 count = mix->numpads;
1912 GST_VIDEO_MIXER2_UNLOCK (mix);
1913 GST_INFO_OBJECT (mix, "Children Count: %d", count);
1918 gst_videomixer2_child_proxy_init (gpointer g_iface, gpointer iface_data)
1920 GstChildProxyInterface *iface = g_iface;
1922 GST_INFO ("intializing child proxy interface");
1923 iface->get_child_by_index = gst_videomixer2_child_proxy_get_child_by_index;
1924 iface->get_children_count = gst_videomixer2_child_proxy_get_children_count;
1927 /* GObject boilerplate */
1929 gst_videomixer2_base_init (gpointer g_class)
1931 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
1933 gst_element_class_add_pad_template (element_class,
1934 gst_static_pad_template_get (&src_factory));
1935 gst_element_class_add_pad_template (element_class,
1936 gst_static_pad_template_get (&sink_factory));
1938 gst_element_class_set_details_simple (element_class, "Video mixer 2",
1939 "Filter/Editor/Video",
1940 "Mix multiple video streams", "Wim Taymans <wim@fluendo.com>, "
1941 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
1945 gst_videomixer2_class_init (GstVideoMixer2Class * klass)
1947 GObjectClass *gobject_class = (GObjectClass *) klass;
1948 GstElementClass *gstelement_class = (GstElementClass *) klass;
1950 gobject_class->finalize = gst_videomixer2_finalize;
1952 gobject_class->get_property = gst_videomixer2_get_property;
1953 gobject_class->set_property = gst_videomixer2_set_property;
1955 g_object_class_install_property (gobject_class, PROP_BACKGROUND,
1956 g_param_spec_enum ("background", "Background", "Background type",
1957 GST_TYPE_VIDEO_MIXER2_BACKGROUND,
1958 DEFAULT_BACKGROUND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1960 gstelement_class->request_new_pad =
1961 GST_DEBUG_FUNCPTR (gst_videomixer2_request_new_pad);
1962 gstelement_class->release_pad =
1963 GST_DEBUG_FUNCPTR (gst_videomixer2_release_pad);
1964 gstelement_class->change_state =
1965 GST_DEBUG_FUNCPTR (gst_videomixer2_change_state);
1967 /* Register the pad class */
1968 g_type_class_ref (GST_TYPE_VIDEO_MIXER2_PAD);
1972 gst_videomixer2_init (GstVideoMixer2 * mix, GstVideoMixer2Class * g_class)
1974 GstElementClass *klass = GST_ELEMENT_GET_CLASS (mix);
1977 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
1979 gst_pad_set_getcaps_function (GST_PAD (mix->srcpad),
1980 GST_DEBUG_FUNCPTR (gst_videomixer2_src_getcaps));
1981 gst_pad_set_setcaps_function (GST_PAD (mix->srcpad),
1982 GST_DEBUG_FUNCPTR (gst_videomixer2_src_setcaps));
1983 gst_pad_set_query_function (GST_PAD (mix->srcpad),
1984 GST_DEBUG_FUNCPTR (gst_videomixer2_src_query));
1985 gst_pad_set_event_function (GST_PAD (mix->srcpad),
1986 GST_DEBUG_FUNCPTR (gst_videomixer2_src_event));
1987 gst_element_add_pad (GST_ELEMENT (mix), mix->srcpad);
1989 mix->collect = gst_collect_pads2_new ();
1990 mix->background = DEFAULT_BACKGROUND;
1992 gst_collect_pads2_set_function (mix->collect,
1993 (GstCollectPads2Function) GST_DEBUG_FUNCPTR (gst_videomixer2_collected),
1995 gst_collect_pads2_set_event_function (mix->collect,
1996 (GstCollectPads2EventFunction) gst_videomixer2_sink_event, mix);
1997 gst_collect_pads2_set_prepare_buffer_function (mix->collect,
1998 (GstCollectPads2BufferFunction) gst_videomixer2_sink_prepare_buffer, mix);
2000 mix->lock = g_mutex_new ();
2001 /* initialize variables */
2002 gst_videomixer2_reset (mix);
2005 /* Element registration */
2007 gst_videomixer2_register (GstPlugin * plugin)
2009 GST_DEBUG_CATEGORY_INIT (gst_videomixer2_debug, "videomixer2", 0,
2012 return gst_element_register (plugin, "videomixer2", GST_RANK_SECONDARY,
2013 GST_TYPE_VIDEO_MIXER2);