diff options
| -rw-r--r-- | sys/v4l2/gstv4l2src.c | 66 |
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, |