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v4l2object: add gst_v4l2_object_try_format
Similar to set_format but it uses TRY_FMT instead of S_FMT https://bugzilla.gnome.org/show_bug.cgi?id=682770
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parent
3c595f308a
commit
6cfa6c0da8
2 changed files with 63 additions and 24 deletions
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@ -2647,8 +2647,9 @@ gst_v4l2_object_extrapolate_stride (const GstVideoFormatInfo * finfo,
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return estride;
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}
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gboolean
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gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
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static gboolean
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gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
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gboolean try_only)
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{
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gint fd = v4l2object->video_fd;
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struct v4l2_format format;
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@ -2665,7 +2666,8 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
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enum v4l2_colorspace colorspace = 0;
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GST_V4L2_CHECK_OPEN (v4l2object);
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GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
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if (!try_only)
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GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
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is_mplane = V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type);
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@ -2796,8 +2798,13 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
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colorspace);
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}
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if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0)
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goto set_fmt_failed;
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if (try_only) {
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if (v4l2_ioctl (fd, VIDIOC_TRY_FMT, &format) < 0)
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goto try_fmt_failed;
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} else {
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if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0)
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goto set_fmt_failed;
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}
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GST_DEBUG_OBJECT (v4l2object->element, "Got format of %dx%d, format "
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"%" GST_FOURCC_FORMAT ", nb planes %d, colorspace %d",
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@ -2840,6 +2847,9 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
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if (is_mplane && format.fmt.pix_mp.num_planes != n_v4l_planes)
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goto invalid_planes;
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if (try_only) /* good enough for trying only */
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return TRUE;
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if (GST_VIDEO_INFO_HAS_ALPHA (&info)) {
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struct v4l2_control ctl = { 0, };
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ctl.id = V4L2_CID_ALPHA_COMPONENT;
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@ -2894,7 +2904,7 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
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goto set_parm_failed;
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if (streamparm.parm.capture.timeperframe.numerator > 0 &&
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streamparm.parm.capture.timeperframe.denominator > 0) {
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streamparm.parm.capture.timeperframe.denominator > 0) {
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/* get new values */
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fps_d = streamparm.parm.capture.timeperframe.numerator;
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fps_n = streamparm.parm.capture.timeperframe.denominator;
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@ -2904,8 +2914,7 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
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} else {
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/* fix v4l2 capture driver to provide framerate values */
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GST_WARNING_OBJECT (v4l2object->element,
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"Reuse caps framerate %u/%u - fix v4l2 capture driver",
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fps_n, fps_d);
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"Reuse caps framerate %u/%u - fix v4l2 capture driver", fps_n, fps_d);
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}
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GST_VIDEO_INFO_FPS_N (&info) = fps_n;
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@ -2929,6 +2938,17 @@ invalid_caps:
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caps);
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return FALSE;
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}
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try_fmt_failed:
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{
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if (errno == EBUSY) {
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GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, BUSY,
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(_("Device '%s' is busy"), v4l2object->videodev),
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("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
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GST_FOURCC_ARGS (pixelformat), width, height,
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g_strerror (errno)));
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}
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return FALSE;
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}
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set_fmt_failed:
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{
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if (errno == EBUSY) {
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@ -2949,30 +2969,36 @@ set_fmt_failed:
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}
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invalid_dimensions:
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{
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GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
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(_("Device '%s' cannot capture at %dx%d"),
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v4l2object->videodev, width, height),
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("Tried to capture at %dx%d, but device returned size %dx%d",
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width, height, format.fmt.pix.width, format.fmt.pix.height));
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if (!try_only) {
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GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
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(_("Device '%s' cannot capture at %dx%d"),
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v4l2object->videodev, width, height),
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("Tried to capture at %dx%d, but device returned size %dx%d",
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width, height, format.fmt.pix.width, format.fmt.pix.height));
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}
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return FALSE;
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}
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invalid_pixelformat:
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{
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GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
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(_("Device '%s' cannot capture in the specified format"),
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v4l2object->videodev),
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("Tried to capture in %" GST_FOURCC_FORMAT
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", but device returned format" " %" GST_FOURCC_FORMAT,
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GST_FOURCC_ARGS (pixelformat),
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GST_FOURCC_ARGS (format.fmt.pix.pixelformat)));
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if (!try_only) {
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GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
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(_("Device '%s' cannot capture in the specified format"),
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v4l2object->videodev),
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("Tried to capture in %" GST_FOURCC_FORMAT
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", but device returned format" " %" GST_FOURCC_FORMAT,
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GST_FOURCC_ARGS (pixelformat),
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GST_FOURCC_ARGS (format.fmt.pix.pixelformat)));
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}
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return FALSE;
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}
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invalid_planes:
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{
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GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
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(_("Device '%s' does support non-contiguous planes"),
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v4l2object->videodev),
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("Device wants %d planes", format.fmt.pix_mp.num_planes));
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if (!try_only) {
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GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
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(_("Device '%s' does support non-contiguous planes"),
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v4l2object->videodev),
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("Device wants %d planes", format.fmt.pix_mp.num_planes));
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}
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return FALSE;
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}
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get_parm_failed:
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@ -2999,6 +3025,18 @@ pool_failed:
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}
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}
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gboolean
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gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps)
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{
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return gst_v4l2_object_set_format_full (v4l2object, caps, FALSE);
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}
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gboolean
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gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps)
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{
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return gst_v4l2_object_set_format_full (v4l2object, caps, TRUE);
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}
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/**
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* gst_v4l2_object_acquire_format:
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* @v4l2object the object
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@ -251,6 +251,7 @@ gint gst_v4l2_object_extrapolate_stride (const GstVideoFormatInfo * fin
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gint plane, gint stride);
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gboolean gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps);
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gboolean gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps);
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gboolean gst_v4l2_object_caps_equal (GstV4l2Object * v4l2object, GstCaps * caps);
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