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
57 #include "gstv4l2colorbalance.h"
58 #include "gstv4l2tuner.h"
60 #include "gstv4l2xoverlay.h"
62 #include "gstv4l2vidorient.h"
64 #include "gstv4l2sink.h"
65 #include "gst/gst-i18n-plugin.h"
69 GST_DEBUG_CATEGORY (v4l2sink_debug);
70 #define GST_CAT_DEFAULT v4l2sink_debug
72 #define PROP_DEF_QUEUE_SIZE 12
73 #define PROP_DEF_MIN_QUEUED_BUFS 1
74 #define DEFAULT_PROP_DEVICE "/dev/video1"
79 V4L2_STD_OBJECT_PROPS,
93 GST_IMPLEMENT_V4L2_PROBE_METHODS (GstV4l2SinkClass, gst_v4l2sink);
94 GST_IMPLEMENT_V4L2_COLOR_BALANCE_METHODS (GstV4l2Sink, gst_v4l2sink);
95 GST_IMPLEMENT_V4L2_TUNER_METHODS (GstV4l2Sink, gst_v4l2sink);
97 GST_IMPLEMENT_V4L2_XOVERLAY_METHODS (GstV4l2Sink, gst_v4l2sink);
99 GST_IMPLEMENT_V4L2_VIDORIENT_METHODS (GstV4l2Sink, gst_v4l2sink);
102 static void gst_v4l2sink_navigation_send_event (GstNavigation * navigation,
103 GstStructure * structure);
105 gst_v4l2sink_navigation_init (GstNavigationInterface * iface)
107 iface->send_event = gst_v4l2sink_navigation_send_event;
111 #define gst_v4l2sink_parent_class parent_class
112 G_DEFINE_TYPE_WITH_CODE (GstV4l2Sink, gst_v4l2sink, GST_TYPE_VIDEO_SINK,
113 G_IMPLEMENT_INTERFACE (GST_TYPE_TUNER, gst_v4l2sink_tuner_interface_init);
115 G_IMPLEMENT_INTERFACE (GST_TYPE_X_OVERLAY,
116 gst_v4l2sink_xoverlay_interface_init);
117 G_IMPLEMENT_INTERFACE (GST_TYPE_NAVIGATION, gst_v4l2sink_navigation_init);
119 G_IMPLEMENT_INTERFACE (GST_TYPE_COLOR_BALANCE,
120 gst_v4l2sink_color_balance_interface_init);
121 G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_ORIENTATION,
122 gst_v4l2sink_video_orientation_interface_init);
123 G_IMPLEMENT_INTERFACE (GST_TYPE_PROPERTY_PROBE,
124 gst_v4l2sink_property_probe_interface_init));
127 static void gst_v4l2sink_dispose (GObject * object);
128 static void gst_v4l2sink_finalize (GstV4l2Sink * v4l2sink);
130 /* GObject methods: */
131 static void gst_v4l2sink_set_property (GObject * object, guint prop_id,
132 const GValue * value, GParamSpec * pspec);
133 static void gst_v4l2sink_get_property (GObject * object, guint prop_id,
134 GValue * value, GParamSpec * pspec);
137 /* GstElement methods: */
138 static GstStateChangeReturn gst_v4l2sink_change_state (GstElement * element,
139 GstStateChange transition);
141 /* GstBaseSink methods: */
142 static GstCaps *gst_v4l2sink_get_caps (GstBaseSink * bsink, GstCaps * filter);
143 static gboolean gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
145 static GstFlowReturn gst_v4l2sink_buffer_alloc (GstBaseSink * bsink,
146 guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
148 static GstFlowReturn gst_v4l2sink_show_frame (GstBaseSink * bsink,
152 gst_v4l2sink_class_init (GstV4l2SinkClass * klass)
154 GObjectClass *gobject_class;
155 GstElementClass *element_class;
156 GstBaseSinkClass *basesink_class;
158 gobject_class = G_OBJECT_CLASS (klass);
159 element_class = GST_ELEMENT_CLASS (klass);
160 basesink_class = GST_BASE_SINK_CLASS (klass);
162 gobject_class->dispose = gst_v4l2sink_dispose;
163 gobject_class->finalize = (GObjectFinalizeFunc) gst_v4l2sink_finalize;
164 gobject_class->set_property = gst_v4l2sink_set_property;
165 gobject_class->get_property = gst_v4l2sink_get_property;
167 element_class->change_state = gst_v4l2sink_change_state;
169 gst_v4l2_object_install_properties_helper (gobject_class,
170 DEFAULT_PROP_DEVICE);
171 g_object_class_install_property (gobject_class, PROP_QUEUE_SIZE,
172 g_param_spec_uint ("queue-size", "Queue size",
173 "Number of buffers to be enqueud in the driver in streaming mode",
174 GST_V4L2_MIN_BUFFERS, GST_V4L2_MAX_BUFFERS, PROP_DEF_QUEUE_SIZE,
175 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
176 g_object_class_install_property (gobject_class, PROP_MIN_QUEUED_BUFS,
177 g_param_spec_uint ("min-queued-bufs", "Minimum queued bufs",
178 "Minimum number of queued bufs; v4l2sink won't dqbuf if the driver "
179 "doesn't have more than this number (which normally you shouldn't change)",
180 0, GST_V4L2_MAX_BUFFERS, PROP_DEF_MIN_QUEUED_BUFS,
181 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
182 g_object_class_install_property (gobject_class, PROP_OVERLAY_TOP,
183 g_param_spec_int ("overlay-top", "Overlay top",
184 "The topmost (y) coordinate of the video overlay; top left corner of screen is 0,0",
185 G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
186 g_object_class_install_property (gobject_class, PROP_OVERLAY_LEFT,
187 g_param_spec_int ("overlay-left", "Overlay left",
188 "The leftmost (x) coordinate of the video overlay; top left corner of screen is 0,0",
189 G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
190 g_object_class_install_property (gobject_class, PROP_OVERLAY_WIDTH,
191 g_param_spec_uint ("overlay-width", "Overlay width",
192 "The width of the video overlay; default is equal to negotiated image width",
193 0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
194 g_object_class_install_property (gobject_class, PROP_OVERLAY_HEIGHT,
195 g_param_spec_uint ("overlay-height", "Overlay height",
196 "The height of the video overlay; default is equal to negotiated image height",
197 0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
199 g_object_class_install_property (gobject_class, PROP_CROP_TOP,
200 g_param_spec_int ("crop-top", "Crop top",
201 "The topmost (y) coordinate of the video crop; top left corner of image is 0,0",
202 0x80000000, 0x7fffffff, 0, G_PARAM_READWRITE));
203 g_object_class_install_property (gobject_class, PROP_CROP_LEFT,
204 g_param_spec_int ("crop-left", "Crop left",
205 "The leftmost (x) coordinate of the video crop; top left corner of image is 0,0",
206 0x80000000, 0x7fffffff, 0, G_PARAM_READWRITE));
207 g_object_class_install_property (gobject_class, PROP_CROP_WIDTH,
208 g_param_spec_uint ("crop-width", "Crop width",
209 "The width of the video crop; default is equal to negotiated image width",
210 0, 0xffffffff, 0, G_PARAM_READWRITE));
211 g_object_class_install_property (gobject_class, PROP_CROP_HEIGHT,
212 g_param_spec_uint ("crop-height", "Crop height",
213 "The height of the video crop; default is equal to negotiated image height",
214 0, 0xffffffff, 0, G_PARAM_READWRITE));
216 gst_element_class_set_details_simple (element_class,
217 "Video (video4linux2) Sink", "Sink/Video",
218 "Displays frames on a video4linux2 device", "Rob Clark <rob@ti.com>,");
220 gst_element_class_add_pad_template (element_class,
221 gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
222 gst_v4l2_object_get_all_caps ()));
224 basesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_v4l2sink_get_caps);
225 basesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_v4l2sink_set_caps);
226 basesink_class->render = GST_DEBUG_FUNCPTR (gst_v4l2sink_show_frame);
228 klass->v4l2_class_devices = NULL;
230 GST_DEBUG_CATEGORY_INIT (v4l2sink_debug, "v4l2sink", 0, "V4L2 sink element");
235 gst_v4l2sink_init (GstV4l2Sink * v4l2sink)
237 v4l2sink->v4l2object = gst_v4l2_object_new (GST_ELEMENT (v4l2sink),
238 V4L2_BUF_TYPE_VIDEO_OUTPUT, DEFAULT_PROP_DEVICE,
239 gst_v4l2_get_output, gst_v4l2_set_output, NULL);
241 /* same default value for video output device as is used for
242 * v4l2src/capture is no good.. so lets set a saner default
243 * (which can be overridden by the one creating the v4l2sink
244 * after the constructor returns)
246 g_object_set (v4l2sink, "device", "/dev/video1", NULL);
248 /* number of buffers requested */
249 v4l2sink->v4l2object->num_buffers = PROP_DEF_QUEUE_SIZE;
250 v4l2sink->v4l2object->min_queued_bufs = PROP_DEF_MIN_QUEUED_BUFS;
252 v4l2sink->probed_caps = NULL;
253 v4l2sink->current_caps = NULL;
255 v4l2sink->overlay_fields_set = 0;
256 v4l2sink->crop_fields_set = 0;
261 gst_v4l2sink_dispose (GObject * object)
263 GstV4l2Sink *v4l2sink = GST_V4L2SINK (object);
265 if (v4l2sink->probed_caps) {
266 gst_caps_unref (v4l2sink->probed_caps);
269 if (v4l2sink->current_caps) {
270 gst_caps_unref (v4l2sink->current_caps);
273 G_OBJECT_CLASS (parent_class)->dispose (object);
278 gst_v4l2sink_finalize (GstV4l2Sink * v4l2sink)
280 gst_v4l2_object_destroy (v4l2sink->v4l2object);
282 G_OBJECT_CLASS (parent_class)->finalize ((GObject *) (v4l2sink));
287 * flags to indicate which overlay/crop properties the user has set (and
288 * therefore which ones should override the defaults from the driver)
293 RECT_LEFT_SET = 0x02,
294 RECT_WIDTH_SET = 0x04,
295 RECT_HEIGHT_SET = 0x08
299 gst_v4l2sink_sync_overlay_fields (GstV4l2Sink * v4l2sink)
301 if (!v4l2sink->overlay_fields_set)
304 if (GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
306 gint fd = v4l2sink->v4l2object->video_fd;
307 struct v4l2_format format;
309 memset (&format, 0x00, sizeof (struct v4l2_format));
310 format.type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
312 if (v4l2_ioctl (fd, VIDIOC_G_FMT, &format) < 0) {
313 GST_WARNING_OBJECT (v4l2sink, "VIDIOC_G_FMT failed");
317 GST_DEBUG_OBJECT (v4l2sink,
318 "setting overlay: overlay_fields_set=0x%02x, top=%d, left=%d, width=%d, height=%d",
319 v4l2sink->overlay_fields_set,
320 v4l2sink->overlay.top, v4l2sink->overlay.left,
321 v4l2sink->overlay.width, v4l2sink->overlay.height);
323 if (v4l2sink->overlay_fields_set & RECT_TOP_SET)
324 format.fmt.win.w.top = v4l2sink->overlay.top;
325 if (v4l2sink->overlay_fields_set & RECT_LEFT_SET)
326 format.fmt.win.w.left = v4l2sink->overlay.left;
327 if (v4l2sink->overlay_fields_set & RECT_WIDTH_SET)
328 format.fmt.win.w.width = v4l2sink->overlay.width;
329 if (v4l2sink->overlay_fields_set & RECT_HEIGHT_SET)
330 format.fmt.win.w.height = v4l2sink->overlay.height;
332 if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0) {
333 GST_WARNING_OBJECT (v4l2sink, "VIDIOC_S_FMT failed");
337 v4l2sink->overlay_fields_set = 0;
338 v4l2sink->overlay = format.fmt.win.w;
343 gst_v4l2sink_sync_crop_fields (GstV4l2Sink * v4l2sink)
345 if (!v4l2sink->crop_fields_set)
348 if (GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
350 gint fd = v4l2sink->v4l2object->video_fd;
351 struct v4l2_crop crop;
353 memset (&crop, 0x00, sizeof (struct v4l2_crop));
354 crop.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
356 if (v4l2_ioctl (fd, VIDIOC_G_CROP, &crop) < 0) {
357 GST_WARNING_OBJECT (v4l2sink, "VIDIOC_G_CROP failed");
361 GST_DEBUG_OBJECT (v4l2sink,
362 "setting crop: crop_fields_set=0x%02x, top=%d, left=%d, width=%d, height=%d",
363 v4l2sink->crop_fields_set,
364 v4l2sink->crop.top, v4l2sink->crop.left,
365 v4l2sink->crop.width, v4l2sink->crop.height);
367 if (v4l2sink->crop_fields_set & RECT_TOP_SET)
368 crop.c.top = v4l2sink->crop.top;
369 if (v4l2sink->crop_fields_set & RECT_LEFT_SET)
370 crop.c.left = v4l2sink->crop.left;
371 if (v4l2sink->crop_fields_set & RECT_WIDTH_SET)
372 crop.c.width = v4l2sink->crop.width;
373 if (v4l2sink->crop_fields_set & RECT_HEIGHT_SET)
374 crop.c.height = v4l2sink->crop.height;
376 if (v4l2_ioctl (fd, VIDIOC_S_CROP, &crop) < 0) {
377 GST_WARNING_OBJECT (v4l2sink, "VIDIOC_S_CROP failed");
381 v4l2sink->crop_fields_set = 0;
382 v4l2sink->crop = crop.c;
388 gst_v4l2sink_set_property (GObject * object,
389 guint prop_id, const GValue * value, GParamSpec * pspec)
391 GstV4l2Sink *v4l2sink = GST_V4L2SINK (object);
393 if (!gst_v4l2_object_set_property_helper (v4l2sink->v4l2object,
394 prop_id, value, pspec)) {
396 case PROP_QUEUE_SIZE:
397 v4l2sink->v4l2object->num_buffers = g_value_get_uint (value);
399 case PROP_MIN_QUEUED_BUFS:
400 v4l2sink->v4l2object->min_queued_bufs = g_value_get_uint (value);
402 case PROP_OVERLAY_TOP:
403 v4l2sink->overlay.top = g_value_get_int (value);
404 v4l2sink->overlay_fields_set |= RECT_TOP_SET;
405 gst_v4l2sink_sync_overlay_fields (v4l2sink);
407 case PROP_OVERLAY_LEFT:
408 v4l2sink->overlay.left = g_value_get_int (value);
409 v4l2sink->overlay_fields_set |= RECT_LEFT_SET;
410 gst_v4l2sink_sync_overlay_fields (v4l2sink);
412 case PROP_OVERLAY_WIDTH:
413 v4l2sink->overlay.width = g_value_get_uint (value);
414 v4l2sink->overlay_fields_set |= RECT_WIDTH_SET;
415 gst_v4l2sink_sync_overlay_fields (v4l2sink);
417 case PROP_OVERLAY_HEIGHT:
418 v4l2sink->overlay.height = g_value_get_uint (value);
419 v4l2sink->overlay_fields_set |= RECT_HEIGHT_SET;
420 gst_v4l2sink_sync_overlay_fields (v4l2sink);
423 v4l2sink->crop.top = g_value_get_int (value);
424 v4l2sink->crop_fields_set |= RECT_TOP_SET;
425 gst_v4l2sink_sync_crop_fields (v4l2sink);
428 v4l2sink->crop.left = g_value_get_int (value);
429 v4l2sink->crop_fields_set |= RECT_LEFT_SET;
430 gst_v4l2sink_sync_crop_fields (v4l2sink);
432 case PROP_CROP_WIDTH:
433 v4l2sink->crop.width = g_value_get_uint (value);
434 v4l2sink->crop_fields_set |= RECT_WIDTH_SET;
435 gst_v4l2sink_sync_crop_fields (v4l2sink);
437 case PROP_CROP_HEIGHT:
438 v4l2sink->crop.height = g_value_get_uint (value);
439 v4l2sink->crop_fields_set |= RECT_HEIGHT_SET;
440 gst_v4l2sink_sync_crop_fields (v4l2sink);
443 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
451 gst_v4l2sink_get_property (GObject * object,
452 guint prop_id, GValue * value, GParamSpec * pspec)
454 GstV4l2Sink *v4l2sink = GST_V4L2SINK (object);
456 if (!gst_v4l2_object_get_property_helper (v4l2sink->v4l2object,
457 prop_id, value, pspec)) {
459 case PROP_QUEUE_SIZE:
460 g_value_set_uint (value, v4l2sink->v4l2object->num_buffers);
462 case PROP_MIN_QUEUED_BUFS:
463 g_value_set_uint (value, v4l2sink->v4l2object->min_queued_bufs);
465 case PROP_OVERLAY_TOP:
466 g_value_set_int (value, v4l2sink->overlay.top);
468 case PROP_OVERLAY_LEFT:
469 g_value_set_int (value, v4l2sink->overlay.left);
471 case PROP_OVERLAY_WIDTH:
472 g_value_set_uint (value, v4l2sink->overlay.width);
474 case PROP_OVERLAY_HEIGHT:
475 g_value_set_uint (value, v4l2sink->overlay.height);
478 g_value_set_int (value, v4l2sink->crop.top);
481 g_value_set_int (value, v4l2sink->crop.left);
483 case PROP_CROP_WIDTH:
484 g_value_set_uint (value, v4l2sink->crop.width);
486 case PROP_CROP_HEIGHT:
487 g_value_set_uint (value, v4l2sink->crop.height);
490 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
496 static GstStateChangeReturn
497 gst_v4l2sink_change_state (GstElement * element, GstStateChange transition)
499 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
500 GstV4l2Sink *v4l2sink = GST_V4L2SINK (element);
502 GST_DEBUG_OBJECT (v4l2sink, "%d -> %d",
503 GST_STATE_TRANSITION_CURRENT (transition),
504 GST_STATE_TRANSITION_NEXT (transition));
506 switch (transition) {
507 case GST_STATE_CHANGE_NULL_TO_READY:
508 /* open the device */
509 if (!gst_v4l2_object_open (v4l2sink->v4l2object))
510 return GST_STATE_CHANGE_FAILURE;
516 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
518 switch (transition) {
519 case GST_STATE_CHANGE_PAUSED_TO_READY:
520 if (!gst_v4l2_object_stop (v4l2sink->v4l2object))
521 return GST_STATE_CHANGE_FAILURE;
523 case GST_STATE_CHANGE_READY_TO_NULL:
524 /* we need to call stop here too */
525 if (!gst_v4l2_object_stop (v4l2sink->v4l2object))
526 return GST_STATE_CHANGE_FAILURE;
527 /* close the device */
528 if (!gst_v4l2_object_close (v4l2sink->v4l2object))
529 return GST_STATE_CHANGE_FAILURE;
540 gst_v4l2sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
542 GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
547 if (!GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
549 GST_DEBUG_OBJECT (v4l2sink, "device is not open");
551 gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SINK_PAD
555 if (v4l2sink->probed_caps == NULL) {
556 formats = gst_v4l2_object_get_format_list (v4l2sink->v4l2object);
558 ret = gst_caps_new_empty ();
560 for (walk = formats; walk; walk = walk->next) {
561 struct v4l2_fmtdesc *format;
563 GstStructure *template;
565 format = (struct v4l2_fmtdesc *) walk->data;
567 template = gst_v4l2_object_v4l2fourcc_to_structure (format->pixelformat);
573 gst_v4l2_object_probe_caps_for_format (v4l2sink->v4l2object,
574 format->pixelformat, template);
576 gst_caps_append (ret, tmp);
578 gst_structure_free (template);
580 GST_DEBUG_OBJECT (v4l2sink, "unknown format %u", format->pixelformat);
583 v4l2sink->probed_caps = ret;
588 gst_caps_intersect_full (filter, v4l2sink->probed_caps,
589 GST_CAPS_INTERSECT_FIRST);
591 ret = gst_caps_ref (v4l2sink->probed_caps);
594 GST_INFO_OBJECT (v4l2sink, "probed caps: %p", ret);
595 LOG_CAPS (v4l2sink, ret);
601 gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
603 GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
604 GstV4l2Object *obj = v4l2sink->v4l2object;
606 LOG_CAPS (v4l2sink, caps);
608 if (!GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
609 GST_DEBUG_OBJECT (v4l2sink, "device is not open");
613 if (v4l2sink->current_caps) {
614 GST_DEBUG_OBJECT (v4l2sink, "already have caps set.. are they equal?");
615 LOG_CAPS (v4l2sink, v4l2sink->current_caps);
616 if (gst_caps_is_equal (v4l2sink->current_caps, caps)) {
617 GST_DEBUG_OBJECT (v4l2sink, "yes they are!");
620 GST_DEBUG_OBJECT (v4l2sink, "no they aren't!");
623 if (!gst_v4l2_object_stop (obj))
626 if (!gst_v4l2_object_set_format (v4l2sink->v4l2object, caps))
629 gst_v4l2sink_sync_overlay_fields (v4l2sink);
630 gst_v4l2sink_sync_crop_fields (v4l2sink);
633 gst_v4l2_xoverlay_prepare_xwindow_id (v4l2sink->v4l2object, TRUE);
636 GST_INFO_OBJECT (v4l2sink, "outputting buffers via mmap()");
638 v4l2sink->video_width = GST_V4L2_WIDTH (v4l2sink->v4l2object);
639 v4l2sink->video_height = GST_V4L2_HEIGHT (v4l2sink->v4l2object);
641 /* TODO: videosink width/height should be scaled according to
644 GST_VIDEO_SINK_WIDTH (v4l2sink) = v4l2sink->video_width;
645 GST_VIDEO_SINK_HEIGHT (v4l2sink) = v4l2sink->video_height;
647 v4l2sink->current_caps = gst_caps_ref (caps);
654 GST_DEBUG_OBJECT (v4l2sink, "failed to stop streaming");
659 /* error already posted */
660 GST_DEBUG_OBJECT (v4l2sink, "can't set format");
665 /* called after A/V sync to render frame */
667 gst_v4l2sink_show_frame (GstBaseSink * bsink, GstBuffer * buf)
670 GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
671 GstV4l2Object *obj = v4l2sink->v4l2object;
673 GST_DEBUG_OBJECT (v4l2sink, "render buffer: %p", buf);
675 ret = gst_v4l2_object_output_buffer (obj, buf);
682 gst_v4l2sink_navigation_send_event (GstNavigation * navigation,
683 GstStructure * structure)
685 GstV4l2Sink *v4l2sink = GST_V4L2SINK (navigation);
686 GstV4l2Xv *xv = v4l2sink->v4l2object->xv;
692 if ((peer = gst_pad_get_peer (GST_VIDEO_SINK_PAD (v4l2sink)))) {
693 GstVideoRectangle rect;
694 gdouble x, y, xscale = 1.0, yscale = 1.0;
696 gst_v4l2_xoverlay_get_render_rect (v4l2sink->v4l2object, &rect);
698 /* We calculate scaling using the original video frames geometry to
699 * include pixel aspect ratio scaling.
701 xscale = (gdouble) v4l2sink->video_width / rect.w;
702 yscale = (gdouble) v4l2sink->video_height / rect.h;
704 /* Converting pointer coordinates to the non scaled geometry */
705 if (gst_structure_get_double (structure, "pointer_x", &x)) {
706 x = MIN (x, rect.x + rect.w);
707 x = MAX (x - rect.x, 0);
708 gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
709 (gdouble) x * xscale, NULL);
711 if (gst_structure_get_double (structure, "pointer_y", &y)) {
712 y = MIN (y, rect.y + rect.h);
713 y = MAX (y - rect.y, 0);
714 gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
715 (gdouble) y * yscale, NULL);
718 gst_pad_send_event (peer, gst_event_new_navigation (structure));
719 gst_object_unref (peer);