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gst/deinterlace2/gstdeinterlace2.c: Don't use proxy_getcaps() but implement our own getcaps() function that doubles/h...

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Original commit message from CVS:
* gst/deinterlace2/gstdeinterlace2.c: (gst_deinterlace2_init),
(gst_greatest_common_divisor), (gst_fraction_double),
(gst_deinterlace2_getcaps), (gst_deinterlace2_setcaps):
Don't use proxy_getcaps() but implement our own getcaps() function
that doubles/halfs the framerate if all fields should be sent out.
This commit is contained in:
Sebastian Dröge 2008-08-02 18:02:44 +00:00
parent 81717e11be
commit 9c028ad75d
2 changed files with 207 additions and 9 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2008-08-02 Sebastian Dröge <sebastian.droege@collabora.co.uk>
* gst/deinterlace2/gstdeinterlace2.c: (gst_deinterlace2_init),
(gst_greatest_common_divisor), (gst_fraction_double),
(gst_deinterlace2_getcaps), (gst_deinterlace2_setcaps):
Don't use proxy_getcaps() but implement our own getcaps() function
that doubles/halfs the framerate if all fields should be sent out.
2008-08-02 Sebastian Dröge <sebastian.droege@collabora.co.uk>
* configure.ac:

208
gst/deinterlace2/gstdeinterlace2.c
View file

@ -171,6 +171,7 @@ static void gst_deinterlace2_set_property (GObject * self, guint prop_id,
static void gst_deinterlace2_get_property (GObject * self, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_deinterlace2_getcaps (GstPad * pad);
static gboolean gst_deinterlace2_setcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_deinterlace2_sink_event (GstPad * pad, GstEvent * event);
static GstFlowReturn gst_deinterlace2_chain (GstPad * pad, GstBuffer * buffer);
@ -337,7 +338,7 @@ gst_deinterlace2_init (GstDeinterlace2 * self, GstDeinterlace2Class * klass)
gst_pad_set_setcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_deinterlace2_setcaps));
gst_pad_set_getcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
GST_DEBUG_FUNCPTR (gst_deinterlace2_getcaps));
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
self->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
@ -350,7 +351,7 @@ gst_deinterlace2_init (GstDeinterlace2 * self, GstDeinterlace2Class * klass)
gst_pad_set_setcaps_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_deinterlace2_setcaps));
gst_pad_set_getcaps_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
GST_DEBUG_FUNCPTR (gst_deinterlace2_getcaps));
gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
gst_element_no_more_pads (GST_ELEMENT (self));
@ -667,6 +668,197 @@ gst_deinterlace2_chain (GstPad * pad, GstBuffer * buf)
return ret;
}
static gint
gst_greatest_common_divisor (gint a, gint b)
{
while (b != 0) {
int temp = a;
a = b;
b = temp % b;
}
return ABS (a);
}
static gboolean
gst_fraction_double (gint * n_out, gint * d_out, gboolean half)
{
gint n, d, gcd;
n = *n_out;
d = *d_out;
if (d == 0)
return FALSE;
if (n == 0 || (n == G_MAXINT && d == 1))
return TRUE;
gcd = gst_greatest_common_divisor (n, d);
n /= gcd;
d /= gcd;
if (!half) {
if (G_MAXINT / 2 >= ABS (n)) {
n *= 2;
} else if (d >= 2) {
d /= 2;
} else {
return FALSE;
}
} else {
if (G_MAXINT / 2 >= ABS (d)) {
d *= 2;
} else if (n >= 2) {
n /= 2;
} else {
return FALSE;
}
}
*n_out = n;
*d_out = d;
return TRUE;
}
static GstCaps *
gst_deinterlace2_getcaps (GstPad * pad)
{
GstCaps *ret;
GstDeinterlace2 *self = GST_DEINTERLACE2 (gst_pad_get_parent (pad));
GstPad *otherpad;
gint len;
const GstCaps *ourcaps;
GstCaps *peercaps;
GST_OBJECT_LOCK (self);
otherpad = (pad == self->srcpad) ? self->sinkpad : self->srcpad;
ourcaps = gst_pad_get_pad_template_caps (pad);
peercaps = gst_pad_peer_get_caps (otherpad);
if (peercaps) {
ret = gst_caps_intersect (ourcaps, peercaps);
gst_caps_unref (peercaps);
} else {
ret = gst_caps_copy (ourcaps);
}
GST_OBJECT_UNLOCK (self);
if (self->fields == GST_DEINTERLACE2_ALL) {
for (len = gst_caps_get_size (ret); len > 0; len--) {
GstStructure *s = gst_caps_get_structure (ret, len - 1);
const GValue *val;
val = gst_structure_get_value (s, "framerate");
if (!val)
continue;
if (G_VALUE_TYPE (val) == GST_TYPE_FRACTION) {
gint n, d;
n = gst_value_get_fraction_numerator (val);
d = gst_value_get_fraction_denominator (val);
if (!gst_fraction_double (&n, &d, pad != self->srcpad)) {
goto error;
}
gst_structure_set (s, "framerate", GST_TYPE_FRACTION, n, d, NULL);
} else if (G_VALUE_TYPE (val) == GST_TYPE_FRACTION_RANGE) {
const GValue *min, *max;
GValue nrange = { 0, }, nmin = {
0,}, nmax = {
0,};
gint n, d;
g_value_init (&nrange, GST_TYPE_FRACTION_RANGE);
g_value_init (&nmin, GST_TYPE_FRACTION);
g_value_init (&nmax, GST_TYPE_FRACTION);
min = gst_value_get_fraction_range_min (val);
max = gst_value_get_fraction_range_max (val);
n = gst_value_get_fraction_numerator (min);
d = gst_value_get_fraction_denominator (min);
if (!gst_fraction_double (&n, &d, pad != self->srcpad)) {
g_value_unset (&nrange);
g_value_unset (&nmax);
g_value_unset (&nmin);
goto error;
}
gst_value_set_fraction (&nmin, n, d);
n = gst_value_get_fraction_numerator (max);
d = gst_value_get_fraction_denominator (max);
if (!gst_fraction_double (&n, &d, pad != self->srcpad)) {
g_value_unset (&nrange);
g_value_unset (&nmax);
g_value_unset (&nmin);
goto error;
}
gst_value_set_fraction (&nmax, n, d);
gst_value_set_fraction_range (&nrange, &nmin, &nmax);
gst_structure_set_value (s, "framerate", &nrange);
g_value_unset (&nmin);
g_value_unset (&nmax);
g_value_unset (&nrange);
} else if (G_VALUE_TYPE (val) == GST_TYPE_LIST) {
const GValue *lval;
GValue nlist = { 0, };
GValue nval = { 0, };
gint i;
g_value_init (&nlist, GST_TYPE_LIST);
for (i = gst_value_list_get_size (val); i > 0; i--) {
gint n, d;
lval = gst_value_list_get_value (val, i);
if (G_VALUE_TYPE (lval) != GST_TYPE_FRACTION)
continue;
n = gst_value_get_fraction_numerator (lval);
d = gst_value_get_fraction_denominator (lval);
/* Double/Half the framerate but if this fails simply
* skip this value from the list */
if (!gst_fraction_double (&n, &d, pad != self->srcpad)) {
continue;
}
g_value_init (&nval, GST_TYPE_FRACTION);
gst_value_set_fraction (&nval, n, d);
gst_value_list_append_value (&nlist, &nval);
g_value_unset (&nval);
}
gst_structure_set_value (s, "framerate", &nlist);
g_value_unset (&nlist);
}
}
}
GST_DEBUG_OBJECT (pad, "Returning caps %" GST_PTR_FORMAT, ret);
return ret;
error:
GST_ERROR_OBJECT (pad, "Unable to transform peer caps");
gst_caps_unref (ret);
return NULL;
}
static gboolean
gst_deinterlace2_setcaps (GstPad * pad, GstCaps * caps)
{
@ -695,12 +887,10 @@ gst_deinterlace2_setcaps (GstPad * pad, GstCaps * caps)
if (self->fields == GST_DEINTERLACE2_ALL) {
gint fps_n = self->frame_rate_n, fps_d = self->frame_rate_d;
othercaps = gst_caps_copy (caps);
if (!gst_fraction_double (&fps_n, &fps_d, otherpad != self->srcpad))
goto invalid_caps;
if (otherpad == self->srcpad)
fps_n *= 2;
else
fps_d *= 2;
othercaps = gst_caps_copy (caps);
gst_caps_set_simple (othercaps, "framerate", GST_TYPE_FRACTION, fps_n,
fps_d, NULL);
@ -748,12 +938,12 @@ done:
invalid_caps:
res = FALSE;
GST_ERROR_OBJECT (self, "Invalid caps: %" GST_PTR_FORMAT, caps);
GST_ERROR_OBJECT (pad, "Invalid caps: %" GST_PTR_FORMAT, caps);
goto done;
caps_not_accepted:
res = FALSE;
GST_ERROR_OBJECT (self, "Caps not accepted: %" GST_PTR_FORMAT, othercaps);
GST_ERROR_OBJECT (pad, "Caps not accepted: %" GST_PTR_FORMAT, othercaps);
gst_caps_unref (othercaps);
goto done;
}