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shapewipe: Add border property to allow smooth borders

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...and use a border of 0.01 in the example application.
This commit is contained in:
Sebastian Dröge 2009-05-29 16:51:50 +02:00
parent db7d1a7eeb
commit 19b4c4f335
3 changed files with 41 additions and 6 deletions
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44
gst/shapewipe/gstshapewipe.c
View file

@ -57,7 +57,8 @@ static GstCaps *gst_shape_wipe_src_getcaps (GstPad * pad);
enum
{
PROP_0,
PROP_POSITION
PROP_POSITION,
PROP_BORDER
};
static GstStaticPadTemplate video_sink_pad_template =
@ -121,6 +122,10 @@ gst_shape_wipe_class_init (GstShapeWipeClass * klass)
g_param_spec_float ("position", "Position", "Position of the mask",
0.0, 1.0, 0.0,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
g_object_class_install_property (gobject_class, PROP_BORDER,
g_param_spec_float ("border", "Border", "Border of the mask",
0.0, 1.0, 0.0,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_shape_wipe_change_state);
@ -176,6 +181,9 @@ gst_shape_wipe_get_property (GObject * object, guint prop_id,
case PROP_POSITION:
g_value_set_float (value, self->mask_position);
break;
case PROP_BORDER:
g_value_set_float (value, self->mask_border);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -192,6 +200,9 @@ gst_shape_wipe_set_property (GObject * object, guint prop_id,
case PROP_POSITION:
self->mask_position = g_value_get_float (value);
break;
case PROP_BORDER:
self->mask_border = g_value_get_float (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -227,6 +238,7 @@ gst_shape_wipe_reset (GstShapeWipe * self)
self->width = self->height = 0;
self->mask_position = 0.0;
self->mask_border = 0.0;
self->mask_bpp = 0;
gst_segment_init (&self->segment, GST_FORMAT_TIME);
@ -544,19 +556,30 @@ gst_shape_wipe_blend_16 (GstShapeWipe * self, GstBuffer * inbuf,
guint i, j;
guint mask_increment = GST_ROUND_UP_2 (self->width) - self->width;
gfloat position = self->mask_position;
gfloat low = MAX (0.0, position - self->mask_border);
gfloat high = MIN (1.0, position + self->mask_border);
for (i = 0; i < self->height; i++) {
for (j = 0; j < self->width; j++) {
if (*mask / 65535.0 < position) {
gfloat in = *mask / 65535.0;
if (in <= low) {
output[0] = 0x00; /* A */
output[1] = 0x00; /* Y */
output[2] = 0x80; /* U */
output[3] = 0x80; /* V */
} else {
} else if (in >= high) {
output[0] = 0xff; /* A */
output[1] = input[1]; /* Y */
output[2] = input[2]; /* U */
output[3] = input[3]; /* V */
} else {
gfloat val = 255 * ((in - low) / (high - low));
output[0] = CLAMP (val, 0, 255); /* A */
output[1] = input[1]; /* Y */
output[2] = input[2]; /* U */
output[3] = input[3]; /* V */
}
mask++;
@ -579,19 +602,30 @@ gst_shape_wipe_blend_8 (GstShapeWipe * self, GstBuffer * inbuf,
guint i, j;
guint mask_increment = GST_ROUND_UP_4 (self->width) - self->width;
gfloat position = self->mask_position;
gfloat low = MAX (0.0, position - self->mask_border);
gfloat high = MIN (1.0, position + self->mask_border);
for (i = 0; i < self->height; i++) {
for (j = 0; j < self->width; j++) {
if (*mask / 255.0 < position) {
gfloat in = *mask / 255.0;
if (in <= low) {
output[0] = 0x00; /* A */
output[1] = 0x00; /* Y */
output[2] = 0x80; /* U */
output[3] = 0x80; /* V */
} else {
} else if (in >= high) {
output[0] = 0xff; /* A */
output[1] = input[1]; /* Y */
output[2] = input[2]; /* U */
output[3] = input[3]; /* V */
} else {
gfloat val = 255 * ((in - low) / (high - low));
output[0] = CLAMP (val, 0, 255); /* A */
output[1] = input[1]; /* Y */
output[2] = input[2]; /* U */
output[3] = input[3]; /* V */
}
mask++;

1
gst/shapewipe/gstshapewipe.h
View file

@ -54,6 +54,7 @@ struct _GstShapeWipe
GstBuffer *mask;
gfloat mask_position;
gfloat mask_border;
GMutex *mask_mutex;
GCond *mask_cond;
gint mask_bpp;

2
tests/examples/shapewipe/shapewipe-example.c
View file

@ -67,7 +67,7 @@ main (gint argc, gchar ** argv)
pipeline_string =
g_strdup_printf
("videotestsrc ! video/x-raw-yuv,width=640,height=480 ! shapewipe name=shape ! videomixer name=mixer ! ffmpegcolorspace ! autovideosink filesrc location=%s ! typefind ! decodebin2 ! ffmpegcolorspace ! videoscale ! queue ! shape.mask_sink videotestsrc pattern=snow ! video/x-raw-yuv,width=640,height=480 ! queue ! mixer.",
("videotestsrc ! video/x-raw-yuv,width=640,height=480 ! shapewipe name=shape border=0.01 ! videomixer name=mixer ! ffmpegcolorspace ! autovideosink filesrc location=%s ! typefind ! decodebin2 ! ffmpegcolorspace ! videoscale ! queue ! shape.mask_sink videotestsrc pattern=snow ! video/x-raw-yuv,width=640,height=480 ! queue ! mixer.",
argv[1]);
pipeline = gst_parse_launch (pipeline_string, NULL);