3 * Copyright (C) 2009 Texas Instruments, Inc - http://www.ti.com/
5 * Description: V4L2 sink element
6 * Created on: Jul 2, 2009
7 * Author: Rob Clark <rob@ti.com>
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
26 * SECTION:element-v4l2sink
28 * v4l2sink can be used to display video to v4l2 devices (screen overlays
29 * provided by the graphics hardware, tv-out, etc)
32 * <title>Example launch lines</title>
34 * gst-launch videotestsrc ! v4l2sink device=/dev/video1
35 * ]| This pipeline displays a test pattern on /dev/video1
37 * gst-launch -v videotestsrc ! navigationtest ! v4l2sink
38 * ]| A pipeline to test navigation events.
39 * While moving the mouse pointer over the test signal you will see a black box
40 * following the mouse pointer. If you press the mouse button somewhere on the
41 * video and release it somewhere else a green box will appear where you pressed
42 * the button and a red one where you released it. (The navigationtest element
43 * is part of gst-plugins-good.) You can observe here that even if the images
44 * are scaled through hardware the pointer coordinates are converted back to the
45 * original video frame geometry so that the box can be drawn to the correct
46 * position. This also handles borders correctly, limiting coordinates to the
56 #include "gst/video/gstvideometa.h"
58 #include "gstv4l2colorbalance.h"
59 #include "gstv4l2tuner.h"
61 #include "gstv4l2videooverlay.h"
63 #include "gstv4l2vidorient.h"
65 #include "gstv4l2sink.h"
66 #include "gst/gst-i18n-plugin.h"
70 GST_DEBUG_CATEGORY (v4l2sink_debug);
71 #define GST_CAT_DEFAULT v4l2sink_debug
73 #define DEFAULT_PROP_DEVICE "/dev/video1"
78 V4L2_STD_OBJECT_PROPS,
90 GST_IMPLEMENT_V4L2_COLOR_BALANCE_METHODS (GstV4l2Sink, gst_v4l2sink);
91 GST_IMPLEMENT_V4L2_TUNER_METHODS (GstV4l2Sink, gst_v4l2sink);
93 GST_IMPLEMENT_V4L2_VIDEO_OVERLAY_METHODS (GstV4l2Sink, gst_v4l2sink);
95 GST_IMPLEMENT_V4L2_VIDORIENT_METHODS (GstV4l2Sink, gst_v4l2sink);
98 static void gst_v4l2sink_navigation_send_event (GstNavigation * navigation,
99 GstStructure * structure);
101 gst_v4l2sink_navigation_init (GstNavigationInterface * iface)
103 iface->send_event = gst_v4l2sink_navigation_send_event;
107 #define gst_v4l2sink_parent_class parent_class
108 G_DEFINE_TYPE_WITH_CODE (GstV4l2Sink, gst_v4l2sink, GST_TYPE_VIDEO_SINK,
109 G_IMPLEMENT_INTERFACE (GST_TYPE_TUNER, gst_v4l2sink_tuner_interface_init);
111 G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_OVERLAY,
112 gst_v4l2sink_video_overlay_interface_init);
113 G_IMPLEMENT_INTERFACE (GST_TYPE_NAVIGATION, gst_v4l2sink_navigation_init);
115 G_IMPLEMENT_INTERFACE (GST_TYPE_COLOR_BALANCE,
116 gst_v4l2sink_color_balance_interface_init);
117 G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_ORIENTATION,
118 gst_v4l2sink_video_orientation_interface_init));
121 static void gst_v4l2sink_dispose (GObject * object);
122 static void gst_v4l2sink_finalize (GstV4l2Sink * v4l2sink);
124 /* GObject methods: */
125 static void gst_v4l2sink_set_property (GObject * object, guint prop_id,
126 const GValue * value, GParamSpec * pspec);
127 static void gst_v4l2sink_get_property (GObject * object, guint prop_id,
128 GValue * value, GParamSpec * pspec);
130 /* GstElement methods: */
131 static GstStateChangeReturn gst_v4l2sink_change_state (GstElement * element,
132 GstStateChange transition);
134 /* GstBaseSink methods: */
135 static gboolean gst_v4l2sink_propose_allocation (GstBaseSink * bsink,
137 static GstCaps *gst_v4l2sink_get_caps (GstBaseSink * bsink, GstCaps * filter);
138 static gboolean gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
140 static GstFlowReturn gst_v4l2sink_buffer_alloc (GstBaseSink * bsink,
141 guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
143 static GstFlowReturn gst_v4l2sink_show_frame (GstBaseSink * bsink,
147 gst_v4l2sink_class_init (GstV4l2SinkClass * klass)
149 GObjectClass *gobject_class;
150 GstElementClass *element_class;
151 GstBaseSinkClass *basesink_class;
153 gobject_class = G_OBJECT_CLASS (klass);
154 element_class = GST_ELEMENT_CLASS (klass);
155 basesink_class = GST_BASE_SINK_CLASS (klass);
157 gobject_class->dispose = gst_v4l2sink_dispose;
158 gobject_class->finalize = (GObjectFinalizeFunc) gst_v4l2sink_finalize;
159 gobject_class->set_property = gst_v4l2sink_set_property;
160 gobject_class->get_property = gst_v4l2sink_get_property;
162 element_class->change_state = gst_v4l2sink_change_state;
164 gst_v4l2_object_install_properties_helper (gobject_class,
165 DEFAULT_PROP_DEVICE);
167 g_object_class_install_property (gobject_class, PROP_OVERLAY_TOP,
168 g_param_spec_int ("overlay-top", "Overlay top",
169 "The topmost (y) coordinate of the video overlay; top left corner of screen is 0,0",
170 G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
171 g_object_class_install_property (gobject_class, PROP_OVERLAY_LEFT,
172 g_param_spec_int ("overlay-left", "Overlay left",
173 "The leftmost (x) coordinate of the video overlay; top left corner of screen is 0,0",
174 G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
175 g_object_class_install_property (gobject_class, PROP_OVERLAY_WIDTH,
176 g_param_spec_uint ("overlay-width", "Overlay width",
177 "The width of the video overlay; default is equal to negotiated image width",
178 0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
179 g_object_class_install_property (gobject_class, PROP_OVERLAY_HEIGHT,
180 g_param_spec_uint ("overlay-height", "Overlay height",
181 "The height of the video overlay; default is equal to negotiated image height",
182 0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
184 g_object_class_install_property (gobject_class, PROP_CROP_TOP,
185 g_param_spec_int ("crop-top", "Crop top",
186 "The topmost (y) coordinate of the video crop; top left corner of image is 0,0",
187 0x80000000, 0x7fffffff, 0, G_PARAM_READWRITE));
188 g_object_class_install_property (gobject_class, PROP_CROP_LEFT,
189 g_param_spec_int ("crop-left", "Crop left",
190 "The leftmost (x) coordinate of the video crop; top left corner of image is 0,0",
191 0x80000000, 0x7fffffff, 0, G_PARAM_READWRITE));
192 g_object_class_install_property (gobject_class, PROP_CROP_WIDTH,
193 g_param_spec_uint ("crop-width", "Crop width",
194 "The width of the video crop; default is equal to negotiated image width",
195 0, 0xffffffff, 0, G_PARAM_READWRITE));
196 g_object_class_install_property (gobject_class, PROP_CROP_HEIGHT,
197 g_param_spec_uint ("crop-height", "Crop height",
198 "The height of the video crop; default is equal to negotiated image height",
199 0, 0xffffffff, 0, G_PARAM_READWRITE));
201 gst_element_class_set_details_simple (element_class,
202 "Video (video4linux2) Sink", "Sink/Video",
203 "Displays frames on a video4linux2 device", "Rob Clark <rob@ti.com>,");
205 gst_element_class_add_pad_template (element_class,
206 gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
207 gst_v4l2_object_get_all_caps ()));
209 basesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_v4l2sink_get_caps);
210 basesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_v4l2sink_set_caps);
211 basesink_class->propose_allocation =
212 GST_DEBUG_FUNCPTR (gst_v4l2sink_propose_allocation);
213 basesink_class->render = GST_DEBUG_FUNCPTR (gst_v4l2sink_show_frame);
215 klass->v4l2_class_devices = NULL;
217 GST_DEBUG_CATEGORY_INIT (v4l2sink_debug, "v4l2sink", 0, "V4L2 sink element");
222 gst_v4l2sink_init (GstV4l2Sink * v4l2sink)
224 v4l2sink->v4l2object = gst_v4l2_object_new (GST_ELEMENT (v4l2sink),
225 V4L2_BUF_TYPE_VIDEO_OUTPUT, DEFAULT_PROP_DEVICE,
226 gst_v4l2_get_output, gst_v4l2_set_output, NULL);
228 /* same default value for video output device as is used for
229 * v4l2src/capture is no good.. so lets set a saner default
230 * (which can be overridden by the one creating the v4l2sink
231 * after the constructor returns)
233 g_object_set (v4l2sink, "device", "/dev/video1", NULL);
235 v4l2sink->probed_caps = NULL;
237 v4l2sink->overlay_fields_set = 0;
238 v4l2sink->crop_fields_set = 0;
243 gst_v4l2sink_dispose (GObject * object)
245 GstV4l2Sink *v4l2sink = GST_V4L2SINK (object);
247 if (v4l2sink->probed_caps) {
248 gst_caps_unref (v4l2sink->probed_caps);
251 G_OBJECT_CLASS (parent_class)->dispose (object);
256 gst_v4l2sink_finalize (GstV4l2Sink * v4l2sink)
258 gst_v4l2_object_destroy (v4l2sink->v4l2object);
260 G_OBJECT_CLASS (parent_class)->finalize ((GObject *) (v4l2sink));
265 * flags to indicate which overlay/crop properties the user has set (and
266 * therefore which ones should override the defaults from the driver)
271 RECT_LEFT_SET = 0x02,
272 RECT_WIDTH_SET = 0x04,
273 RECT_HEIGHT_SET = 0x08
277 gst_v4l2sink_sync_overlay_fields (GstV4l2Sink * v4l2sink)
279 if (!v4l2sink->overlay_fields_set)
282 if (GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
284 gint fd = v4l2sink->v4l2object->video_fd;
285 struct v4l2_format format;
287 memset (&format, 0x00, sizeof (struct v4l2_format));
288 format.type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
290 if (v4l2_ioctl (fd, VIDIOC_G_FMT, &format) < 0) {
291 GST_WARNING_OBJECT (v4l2sink, "VIDIOC_G_FMT failed");
295 GST_DEBUG_OBJECT (v4l2sink,
296 "setting overlay: overlay_fields_set=0x%02x, top=%d, left=%d, width=%d, height=%d",
297 v4l2sink->overlay_fields_set,
298 v4l2sink->overlay.top, v4l2sink->overlay.left,
299 v4l2sink->overlay.width, v4l2sink->overlay.height);
301 if (v4l2sink->overlay_fields_set & RECT_TOP_SET)
302 format.fmt.win.w.top = v4l2sink->overlay.top;
303 if (v4l2sink->overlay_fields_set & RECT_LEFT_SET)
304 format.fmt.win.w.left = v4l2sink->overlay.left;
305 if (v4l2sink->overlay_fields_set & RECT_WIDTH_SET)
306 format.fmt.win.w.width = v4l2sink->overlay.width;
307 if (v4l2sink->overlay_fields_set & RECT_HEIGHT_SET)
308 format.fmt.win.w.height = v4l2sink->overlay.height;
310 if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0) {
311 GST_WARNING_OBJECT (v4l2sink, "VIDIOC_S_FMT failed");
315 v4l2sink->overlay_fields_set = 0;
316 v4l2sink->overlay = format.fmt.win.w;
321 gst_v4l2sink_sync_crop_fields (GstV4l2Sink * v4l2sink)
323 if (!v4l2sink->crop_fields_set)
326 if (GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
328 gint fd = v4l2sink->v4l2object->video_fd;
329 struct v4l2_crop crop;
331 memset (&crop, 0x00, sizeof (struct v4l2_crop));
332 crop.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
334 if (v4l2_ioctl (fd, VIDIOC_G_CROP, &crop) < 0) {
335 GST_WARNING_OBJECT (v4l2sink, "VIDIOC_G_CROP failed");
339 GST_DEBUG_OBJECT (v4l2sink,
340 "setting crop: crop_fields_set=0x%02x, top=%d, left=%d, width=%d, height=%d",
341 v4l2sink->crop_fields_set,
342 v4l2sink->crop.top, v4l2sink->crop.left,
343 v4l2sink->crop.width, v4l2sink->crop.height);
345 if (v4l2sink->crop_fields_set & RECT_TOP_SET)
346 crop.c.top = v4l2sink->crop.top;
347 if (v4l2sink->crop_fields_set & RECT_LEFT_SET)
348 crop.c.left = v4l2sink->crop.left;
349 if (v4l2sink->crop_fields_set & RECT_WIDTH_SET)
350 crop.c.width = v4l2sink->crop.width;
351 if (v4l2sink->crop_fields_set & RECT_HEIGHT_SET)
352 crop.c.height = v4l2sink->crop.height;
354 if (v4l2_ioctl (fd, VIDIOC_S_CROP, &crop) < 0) {
355 GST_WARNING_OBJECT (v4l2sink, "VIDIOC_S_CROP failed");
359 v4l2sink->crop_fields_set = 0;
360 v4l2sink->crop = crop.c;
366 gst_v4l2sink_set_property (GObject * object,
367 guint prop_id, const GValue * value, GParamSpec * pspec)
369 GstV4l2Sink *v4l2sink = GST_V4L2SINK (object);
371 if (!gst_v4l2_object_set_property_helper (v4l2sink->v4l2object,
372 prop_id, value, pspec)) {
374 case PROP_OVERLAY_TOP:
375 v4l2sink->overlay.top = g_value_get_int (value);
376 v4l2sink->overlay_fields_set |= RECT_TOP_SET;
377 gst_v4l2sink_sync_overlay_fields (v4l2sink);
379 case PROP_OVERLAY_LEFT:
380 v4l2sink->overlay.left = g_value_get_int (value);
381 v4l2sink->overlay_fields_set |= RECT_LEFT_SET;
382 gst_v4l2sink_sync_overlay_fields (v4l2sink);
384 case PROP_OVERLAY_WIDTH:
385 v4l2sink->overlay.width = g_value_get_uint (value);
386 v4l2sink->overlay_fields_set |= RECT_WIDTH_SET;
387 gst_v4l2sink_sync_overlay_fields (v4l2sink);
389 case PROP_OVERLAY_HEIGHT:
390 v4l2sink->overlay.height = g_value_get_uint (value);
391 v4l2sink->overlay_fields_set |= RECT_HEIGHT_SET;
392 gst_v4l2sink_sync_overlay_fields (v4l2sink);
395 v4l2sink->crop.top = g_value_get_int (value);
396 v4l2sink->crop_fields_set |= RECT_TOP_SET;
397 gst_v4l2sink_sync_crop_fields (v4l2sink);
400 v4l2sink->crop.left = g_value_get_int (value);
401 v4l2sink->crop_fields_set |= RECT_LEFT_SET;
402 gst_v4l2sink_sync_crop_fields (v4l2sink);
404 case PROP_CROP_WIDTH:
405 v4l2sink->crop.width = g_value_get_uint (value);
406 v4l2sink->crop_fields_set |= RECT_WIDTH_SET;
407 gst_v4l2sink_sync_crop_fields (v4l2sink);
409 case PROP_CROP_HEIGHT:
410 v4l2sink->crop.height = g_value_get_uint (value);
411 v4l2sink->crop_fields_set |= RECT_HEIGHT_SET;
412 gst_v4l2sink_sync_crop_fields (v4l2sink);
415 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
423 gst_v4l2sink_get_property (GObject * object,
424 guint prop_id, GValue * value, GParamSpec * pspec)
426 GstV4l2Sink *v4l2sink = GST_V4L2SINK (object);
428 if (!gst_v4l2_object_get_property_helper (v4l2sink->v4l2object,
429 prop_id, value, pspec)) {
431 case PROP_OVERLAY_TOP:
432 g_value_set_int (value, v4l2sink->overlay.top);
434 case PROP_OVERLAY_LEFT:
435 g_value_set_int (value, v4l2sink->overlay.left);
437 case PROP_OVERLAY_WIDTH:
438 g_value_set_uint (value, v4l2sink->overlay.width);
440 case PROP_OVERLAY_HEIGHT:
441 g_value_set_uint (value, v4l2sink->overlay.height);
444 g_value_set_int (value, v4l2sink->crop.top);
447 g_value_set_int (value, v4l2sink->crop.left);
449 case PROP_CROP_WIDTH:
450 g_value_set_uint (value, v4l2sink->crop.width);
452 case PROP_CROP_HEIGHT:
453 g_value_set_uint (value, v4l2sink->crop.height);
456 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
462 static GstStateChangeReturn
463 gst_v4l2sink_change_state (GstElement * element, GstStateChange transition)
465 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
466 GstV4l2Sink *v4l2sink = GST_V4L2SINK (element);
468 GST_DEBUG_OBJECT (v4l2sink, "%d -> %d",
469 GST_STATE_TRANSITION_CURRENT (transition),
470 GST_STATE_TRANSITION_NEXT (transition));
472 switch (transition) {
473 case GST_STATE_CHANGE_NULL_TO_READY:
474 /* open the device */
475 if (!gst_v4l2_object_open (v4l2sink->v4l2object))
476 return GST_STATE_CHANGE_FAILURE;
482 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
484 switch (transition) {
485 case GST_STATE_CHANGE_PAUSED_TO_READY:
486 if (!gst_v4l2_object_stop (v4l2sink->v4l2object))
487 return GST_STATE_CHANGE_FAILURE;
489 case GST_STATE_CHANGE_READY_TO_NULL:
490 /* we need to call stop here too */
491 if (!gst_v4l2_object_stop (v4l2sink->v4l2object))
492 return GST_STATE_CHANGE_FAILURE;
493 /* close the device */
494 if (!gst_v4l2_object_close (v4l2sink->v4l2object))
495 return GST_STATE_CHANGE_FAILURE;
506 gst_v4l2sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
508 GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
513 if (!GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
515 GST_DEBUG_OBJECT (v4l2sink, "device is not open");
517 gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SINK_PAD
521 if (v4l2sink->probed_caps == NULL) {
522 formats = gst_v4l2_object_get_format_list (v4l2sink->v4l2object);
524 ret = gst_caps_new_empty ();
526 for (walk = formats; walk; walk = walk->next) {
527 struct v4l2_fmtdesc *format;
529 GstStructure *template;
531 format = (struct v4l2_fmtdesc *) walk->data;
533 template = gst_v4l2_object_v4l2fourcc_to_structure (format->pixelformat);
539 gst_v4l2_object_probe_caps_for_format (v4l2sink->v4l2object,
540 format->pixelformat, template);
542 gst_caps_append (ret, tmp);
544 gst_structure_free (template);
546 GST_DEBUG_OBJECT (v4l2sink, "unknown format %u", format->pixelformat);
549 v4l2sink->probed_caps = ret;
554 gst_caps_intersect_full (filter, v4l2sink->probed_caps,
555 GST_CAPS_INTERSECT_FIRST);
557 ret = gst_caps_ref (v4l2sink->probed_caps);
560 GST_INFO_OBJECT (v4l2sink, "probed caps: %p", ret);
561 LOG_CAPS (v4l2sink, ret);
567 gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
569 GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
570 GstV4l2Object *obj = v4l2sink->v4l2object;
572 LOG_CAPS (v4l2sink, caps);
574 if (!GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
575 GST_DEBUG_OBJECT (v4l2sink, "device is not open");
579 if (!gst_v4l2_object_stop (obj))
582 if (!gst_v4l2_object_set_format (v4l2sink->v4l2object, caps))
585 gst_v4l2sink_sync_overlay_fields (v4l2sink);
586 gst_v4l2sink_sync_crop_fields (v4l2sink);
589 gst_v4l2_video_overlay_prepare_window_handle (v4l2sink->v4l2object, TRUE);
592 GST_INFO_OBJECT (v4l2sink, "outputting buffers via mmap()");
594 v4l2sink->video_width = GST_V4L2_WIDTH (v4l2sink->v4l2object);
595 v4l2sink->video_height = GST_V4L2_HEIGHT (v4l2sink->v4l2object);
597 /* TODO: videosink width/height should be scaled according to
600 GST_VIDEO_SINK_WIDTH (v4l2sink) = v4l2sink->video_width;
601 GST_VIDEO_SINK_HEIGHT (v4l2sink) = v4l2sink->video_height;
608 GST_DEBUG_OBJECT (v4l2sink, "failed to stop streaming");
613 /* error already posted */
614 GST_DEBUG_OBJECT (v4l2sink, "can't set format");
620 gst_v4l2sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
622 GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
623 GstV4l2Object *obj = v4l2sink->v4l2object;
629 gst_query_parse_allocation (query, &caps, &need_pool);
634 if ((pool = obj->pool))
635 gst_object_ref (pool);
638 const GstCaps *pcaps;
639 GstStructure *config;
641 /* we had a pool, check caps */
642 config = gst_buffer_pool_get_config (pool);
643 gst_buffer_pool_config_get (config, &pcaps, &size, NULL, NULL, NULL, NULL,
646 GST_DEBUG_OBJECT (v4l2sink,
647 "we had a pool with caps %" GST_PTR_FORMAT, pcaps);
648 if (!gst_caps_is_equal (caps, pcaps)) {
649 gst_object_unref (pool);
653 /* we need at least 2 buffers to operate */
654 gst_query_add_allocation_pool (query, pool, size, 2, 0);
656 /* we also support various metadata */
657 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE);
658 gst_query_add_allocation_meta (query, GST_VIDEO_CROP_META_API_TYPE);
661 gst_object_unref (pool);
668 GST_DEBUG_OBJECT (v4l2sink, "no caps specified");
673 /* different caps, we can't use this pool */
674 GST_DEBUG_OBJECT (v4l2sink, "pool has different caps");
679 /* called after A/V sync to render frame */
681 gst_v4l2sink_show_frame (GstBaseSink * bsink, GstBuffer * buf)
684 GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
685 GstV4l2Object *obj = v4l2sink->v4l2object;
687 GST_DEBUG_OBJECT (v4l2sink, "render buffer: %p", buf);
689 if (G_UNLIKELY (obj->pool == NULL))
693 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL_CAST (obj->pool), buf);
700 GST_ERROR_OBJECT (bsink, "not negotiated");
701 return GST_FLOW_NOT_NEGOTIATED;
707 gst_v4l2sink_navigation_send_event (GstNavigation * navigation,
708 GstStructure * structure)
710 GstV4l2Sink *v4l2sink = GST_V4L2SINK (navigation);
711 GstV4l2Xv *xv = v4l2sink->v4l2object->xv;
717 if ((peer = gst_pad_get_peer (GST_VIDEO_SINK_PAD (v4l2sink)))) {
718 GstVideoRectangle rect;
719 gdouble x, y, xscale = 1.0, yscale = 1.0;
721 gst_v4l2_video_overlay_get_render_rect (v4l2sink->v4l2object, &rect);
723 /* We calculate scaling using the original video frames geometry to
724 * include pixel aspect ratio scaling.
726 xscale = (gdouble) v4l2sink->video_width / rect.w;
727 yscale = (gdouble) v4l2sink->video_height / rect.h;
729 /* Converting pointer coordinates to the non scaled geometry */
730 if (gst_structure_get_double (structure, "pointer_x", &x)) {
731 x = MIN (x, rect.x + rect.w);
732 x = MAX (x - rect.x, 0);
733 gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
734 (gdouble) x * xscale, NULL);
736 if (gst_structure_get_double (structure, "pointer_y", &y)) {
737 y = MIN (y, rect.y + rect.h);
738 y = MAX (y - rect.y, 0);
739 gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
740 (gdouble) y * yscale, NULL);
743 gst_pad_send_event (peer, gst_event_new_navigation (structure));
744 gst_object_unref (peer);