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v4l2object: Implement gst_v4l2_dup()
This will duplicated the FD from another object and copy over the probed result. https://bugzilla.gnome.org/show_bug.cgi?id=720568
This commit is contained in:
Nicolas Dufresne
parent
7fd6dc08b9
commit
cf32d6ec43
2 changed files with 86 additions and 26 deletions
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@ -470,6 +470,40 @@ gst_v4l2_empty_lists (GstV4l2Object * v4l2object)
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g_datalist_clear (&v4l2object->controls);
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}
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static void
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gst_v4l2_adjust_buf_type (GstV4l2Object * v4l2object)
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{
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/* when calling gst_v4l2_object_new the user decides the initial type
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* so adjust it if multi-planar is supported
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* the driver should make it exclusive. So the driver should
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* not support both MPLANE and non-PLANE.
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* Because even when using MPLANE it still possibles to use it
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* in a contiguous manner. In this case the first v4l2 plane
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* contains all the gst planes.
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*/
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switch (v4l2object->type) {
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case V4L2_BUF_TYPE_VIDEO_OUTPUT:
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if (v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_OUTPUT_MPLANE
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|| v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_M2M_MPLANE) {
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GST_DEBUG ("adjust type to multi-planar output");
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v4l2object->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
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}
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break;
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case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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if (v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE
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|| v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_M2M_MPLANE) {
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/* FIXME: for now it's an untested case so just put a warning */
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GST_WARNING ("untested V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE");
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GST_DEBUG ("adjust type to multi-planar capture");
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v4l2object->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
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}
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break;
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default:
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break;
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}
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}
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/******************************************************
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* gst_v4l2_open():
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* open the video device (v4l2object->videodev)
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@ -534,33 +568,8 @@ gst_v4l2_open (GstV4l2Object * v4l2object)
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V4L2_CAP_VIDEO_OUTPUT_MPLANE)))
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goto not_output;
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/* when calling gst_v4l2_object_new the user decides the initial type
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* so adjust it if multi-planar is supported
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* the driver should make it exclusive. So the driver should
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* not support both MPLANE and non-PLANE.
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* Because even when using MPLANE it still possibles to use it
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* in a contiguous manner. In this case the first v4l2 plane
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* contains all the gst planes.
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*/
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switch (v4l2object->type) {
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case V4L2_BUF_TYPE_VIDEO_OUTPUT:
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if (v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_OUTPUT_MPLANE) {
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GST_DEBUG ("adjust type to multi-planar output");
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v4l2object->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
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}
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break;
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case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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if (v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE) {
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/* FIXME: for now it's an untested case so just put a warning */
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GST_WARNING ("untested V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE");
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GST_DEBUG ("adjust type to multi-planar capture");
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v4l2object->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
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}
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break;
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default:
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break;
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}
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gst_v4l2_adjust_buf_type (v4l2object);
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/* create enumerations, posts errors. */
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if (!gst_v4l2_fill_lists (v4l2object))
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@ -642,6 +651,56 @@ error:
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}
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}
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gboolean
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gst_v4l2_dup (GstV4l2Object * v4l2object, GstV4l2Object * other)
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{
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GstPollFD pollfd = GST_POLL_FD_INIT;
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GST_DEBUG_OBJECT (v4l2object->element, "Trying to dup device %s",
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other->videodev);
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GST_V4L2_CHECK_OPEN (other);
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GST_V4L2_CHECK_NOT_OPEN (v4l2object);
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GST_V4L2_CHECK_NOT_ACTIVE (other);
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GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
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v4l2object->vcap = other->vcap;
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gst_v4l2_adjust_buf_type (v4l2object);
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v4l2object->video_fd = v4l2_dup (other->video_fd);
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if (!GST_V4L2_IS_OPEN (v4l2object))
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goto not_open;
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g_free (v4l2object->videodev);
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v4l2object->videodev = g_strdup (other->videodev);
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GST_INFO_OBJECT (v4l2object->element,
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"Cloned device '%s' (%s) successfully",
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v4l2object->vcap.card, v4l2object->videodev);
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pollfd.fd = v4l2object->video_fd;
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gst_poll_add_fd (v4l2object->poll, &pollfd);
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if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
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|| v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
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gst_poll_fd_ctl_read (v4l2object->poll, &pollfd, TRUE);
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else
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gst_poll_fd_ctl_write (v4l2object->poll, &pollfd, TRUE);
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v4l2object->never_interlaced = other->never_interlaced;
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v4l2object->can_poll_device = TRUE;
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return TRUE;
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not_open:
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{
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GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, OPEN_READ_WRITE,
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(_("Could not dup device '%s' for reading and writing."),
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v4l2object->videodev), GST_ERROR_SYSTEM);
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return FALSE;
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}
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}
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/******************************************************
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* gst_v4l2_close():
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@ -91,6 +91,7 @@
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/* open/close the device */
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gboolean gst_v4l2_open (GstV4l2Object *v4l2object);
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gboolean gst_v4l2_dup (GstV4l2Object *v4l2object, GstV4l2Object *other);
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gboolean gst_v4l2_close (GstV4l2Object *v4l2object);
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/* norm/input/output */
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