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videobox: Properly handle ranges/lists of width or height when transforming caps

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Code partly taken from the videocrop element.
This commit is contained in:
Sebastian Dröge 2010-04-18 20:58:14 +02:00
parent f71157fa06
commit a105bf49e3
1 changed files with 101 additions and 27 deletions
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128
gst/videobox/gstvideobox.c
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@ -2181,6 +2181,66 @@ gst_video_box_get_property (GObject * object, guint prop_id, GValue * value,
}
}
static inline gint
gst_video_box_transform_dimension (gint val, gint delta)
{
gint64 new_val = (gint64) val + (gint64) delta;
new_val = CLAMP (new_val, 1, G_MAXINT);
return (gint) new_val;
}
static gboolean
gst_video_box_transform_dimension_value (const GValue * src_val,
gint delta, GValue * dest_val)
{
gboolean ret = TRUE;
g_value_init (dest_val, G_VALUE_TYPE (src_val));
if (G_VALUE_HOLDS_INT (src_val)) {
gint ival = g_value_get_int (src_val);
ival = gst_video_box_transform_dimension (ival, delta);
g_value_set_int (dest_val, ival);
} else if (GST_VALUE_HOLDS_INT_RANGE (src_val)) {
gint min = gst_value_get_int_range_min (src_val);
gint max = gst_value_get_int_range_max (src_val);
min = gst_video_box_transform_dimension (min, delta);
max = gst_video_box_transform_dimension (max, delta);
if (min > max) {
ret = FALSE;
g_value_unset (dest_val);
} else {
gst_value_set_int_range (dest_val, min, max);
}
} else if (GST_VALUE_HOLDS_LIST (src_val)) {
gint i;
for (i = 0; i < gst_value_list_get_size (src_val); ++i) {
const GValue *list_val;
GValue newval = { 0, };
list_val = gst_value_list_get_value (src_val, i);
if (gst_video_box_transform_dimension_value (list_val, delta, &newval))
gst_value_list_append_value (dest_val, &newval);
g_value_unset (&newval);
}
if (gst_value_list_get_size (dest_val) == 0) {
g_value_unset (dest_val);
ret = FALSE;
}
} else {
g_value_unset (dest_val);
ret = FALSE;
}
return ret;
}
static GstCaps *
gst_video_box_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * from)
@ -2191,7 +2251,6 @@ gst_video_box_transform_caps (GstBaseTransform * trans,
const gchar *name;
GstStructure *structure;
GstPad *other;
gint width, height;
to = gst_caps_copy (from);
/* Just to be sure... */
@ -2203,37 +2262,52 @@ gst_video_box_transform_caps (GstBaseTransform * trans,
gst_structure_remove_field (structure, "width");
gst_structure_remove_field (structure, "height");
} else {
gint dw = 0, dh = 0;
const GValue *v;
GValue w_val = { 0, };
GValue h_val = { 0, };
/* calculate width and height */
if (gst_structure_get_int (structure, "width", &width)) {
if (direction == GST_PAD_SINK) {
width -= video_box->box_left;
width -= video_box->box_right;
} else {
width += video_box->box_left;
width += video_box->box_right;
}
if (width <= 0)
width = 1;
GST_DEBUG_OBJECT (trans, "New caps width: %d", width);
gst_structure_set (structure, "width", G_TYPE_INT, width, NULL);
if (direction == GST_PAD_SINK) {
dw -= video_box->box_left;
dw -= video_box->box_right;
} else {
dw += video_box->box_left;
dw += video_box->box_right;
}
if (gst_structure_get_int (structure, "height", &height)) {
if (direction == GST_PAD_SINK) {
height -= video_box->box_top;
height -= video_box->box_bottom;
} else {
height += video_box->box_top;
height += video_box->box_bottom;
}
if (height <= 0)
height = 1;
GST_DEBUG_OBJECT (trans, "New caps height: %d", height);
gst_structure_set (structure, "height", G_TYPE_INT, height, NULL);
if (direction == GST_PAD_SINK) {
dh -= video_box->box_top;
dh -= video_box->box_bottom;
} else {
dh += video_box->box_top;
dh += video_box->box_bottom;
}
v = gst_structure_get_value (structure, "width");
if (!gst_video_box_transform_dimension_value (v, dw, &w_val)) {
GST_WARNING_OBJECT (video_box, "could not tranform width value with dw=%d"
", caps structure=%" GST_PTR_FORMAT, dw, structure);
gst_caps_unref (to);
to = gst_caps_new_empty ();
return to;
}
gst_structure_set_value (structure, "width", &w_val);
v = gst_structure_get_value (structure, "height");
if (!gst_video_box_transform_dimension_value (v, dh, &h_val)) {
g_value_unset (&w_val);
GST_WARNING_OBJECT (video_box,
"could not tranform height value with dh=%d" ", caps structure=%"
GST_PTR_FORMAT, dh, structure);
gst_caps_unref (to);
to = gst_caps_new_empty ();
return to;
}
gst_structure_set_value (structure, "height", &h_val);
g_value_unset (&w_val);
g_value_unset (&h_val);
}
/* Supported conversions: