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Add the convert functions to the source pads of the video4linux and video4linux2 source plugins

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Original commit message from CVS:
Add the convert functions to the source pads of the video4linux and video4linux2 source plugins
This commit is contained in:
Ronald S. Bultje 2002-09-16 21:01:43 +00:00
parent dd07d61791
commit 899ab22256
1 changed files with 65 additions and 1 deletions
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66
sys/v4l2/gstv4l2src.c
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@ -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,