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-rw-r--r--sys/v4l2/gstv4l2src.c66
1 files changed, 65 insertions, 1 deletions
diff --git a/sys/v4l2/gstv4l2src.c b/sys/v4l2/gstv4l2src.c
index 6f102984..590a62b8 100644
--- a/sys/v4l2/gstv4l2src.c
+++ b/sys/v4l2/gstv4l2src.c
@@ -56,9 +56,14 @@ static void gst_v4l2src_class_init (GstV4l2SrcClass *klass);
static void gst_v4l2src_init (GstV4l2Src *v4l2src);
/* pad/buffer functions */
+static gboolean gst_v4l2src_srcconvert (GstPad *pad,
+ GstFormat src_format,
+ gint64 src_value,
+ GstFormat *dest_format,
+ gint64 *dest_value);
static GstPadConnectReturn gst_v4l2src_srcconnect (GstPad *pad,
GstCaps *caps);
-static GstBuffer * gst_v4l2src_get (GstPad *pad);
+static GstBuffer * gst_v4l2src_get (GstPad *pad);
/* get/set params */
static void gst_v4l2src_set_property (GObject *object,
@@ -170,6 +175,7 @@ gst_v4l2src_init (GstV4l2Src *v4l2src)
gst_pad_set_get_function(v4l2src->srcpad, gst_v4l2src_get);
gst_pad_set_connect_function(v4l2src->srcpad, gst_v4l2src_srcconnect);
+ gst_pad_set_convert_function (v4l2src->srcpad, gst_v4l2src_srcconvert);
v4l2src->bufferpool = gst_buffer_pool_new(NULL, NULL,
gst_v4l2src_buffer_new,
@@ -184,6 +190,64 @@ gst_v4l2src_init (GstV4l2Src *v4l2src)
}
+static gboolean
+gst_v4l2src_srcconvert (GstPad *pad,
+ GstFormat src_format,
+ gint64 src_value,
+ GstFormat *dest_format,
+ gint64 *dest_value)
+{
+ GstV4l2Src *v4l2src;
+ gint norm;
+ struct v4l2_standard *std;
+ gdouble fps;
+
+ v4l2src = GST_V4L2SRC (gst_pad_get_parent (pad));
+
+ if (!GST_V4L2_IS_OPEN(v4l2src))
+ return FALSE;
+
+ if (!gst_v4l2_get_norm(v4l2src, &norm))
+ return FALSE;
+
+ std = &((struct v4l2_enumstd *) g_list_nth_data(v4l2src->norms, norm))->std;
+ fps = std->framerate.numerator / std->framerate.denominator;
+
+ switch (src_format) {
+ case GST_FORMAT_TIME:
+ switch (*dest_format) {
+ case GST_FORMAT_DEFAULT:
+ *dest_format = GST_FORMAT_UNITS;
+ /* fall-through */
+ case GST_FORMAT_UNITS:
+ *dest_value = src_value * fps / GST_SECOND;
+ break;
+ default:
+ return FALSE;
+ }
+ break;
+
+ case GST_FORMAT_UNITS:
+ switch (*dest_format) {
+ case GST_FORMAT_DEFAULT:
+ *dest_format = GST_FORMAT_TIME;
+ /* fall-through */
+ case GST_FORMAT_TIME:
+ *dest_value = src_value * GST_SECOND / fps;
+ break;
+ default:
+ return FALSE;
+ }
+ break;
+
+ default:
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+
static GstCaps *
gst_v4l2src_v4l2fourcc_to_caps (guint32 fourcc,
gint width,