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use max width and height for fixation

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Original commit message from CVS:
use max width and height for fixation
This commit is contained in:
Thomas Vander Stichele 2004-04-27 15:08:27 +00:00
parent 21dadc6449
commit e77412eaf0
2 changed files with 46 additions and 4 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2004-04-27 Thomas Vander Stichele <thomas at apestaart dot org>
* Makefile.am:
* sys/v4l/gstv4lsrc.c: (gst_v4lsrc_init), (gst_v4lsrc_fixate),
(gst_v4lsrc_getcaps), (gst_v4lsrc_buffer_free):
fixate to max width and height of device
2004-04-27 Thomas Vander Stichele <thomas at apestaart dot org>
* Makefile.am:

43
sys/v4l/gstv4lsrc.c
View file

@ -86,6 +86,7 @@ static gboolean gst_v4lsrc_src_query (GstPad * pad,
/* buffer functions */
static GstPadLinkReturn gst_v4lsrc_srcconnect (GstPad * pad,
const GstCaps * caps);
static GstCaps *gst_v4lsrc_fixate (GstPad * pad, const GstCaps * caps);
static GstCaps *gst_v4lsrc_getcaps (GstPad * pad);
static GstData *gst_v4lsrc_get (GstPad * pad);
@ -214,6 +215,7 @@ gst_v4lsrc_init (GstV4lSrc * v4lsrc)
gst_pad_set_get_function (v4lsrc->srcpad, gst_v4lsrc_get);
gst_pad_set_getcaps_function (v4lsrc->srcpad, gst_v4lsrc_getcaps);
gst_pad_set_fixate_function (v4lsrc->srcpad, gst_v4lsrc_fixate);
gst_pad_set_link_function (v4lsrc->srcpad, gst_v4lsrc_srcconnect);
gst_pad_set_convert_function (v4lsrc->srcpad, gst_v4lsrc_src_convert);
gst_pad_set_formats_function (v4lsrc->srcpad, gst_v4lsrc_get_formats);
@ -575,6 +577,37 @@ gst_v4lsrc_srcconnect (GstPad * pad, const GstCaps * vscapslist)
return GST_PAD_LINK_OK;
}
static GstCaps *
gst_v4lsrc_fixate (GstPad * pad, const GstCaps * caps)
{
GstStructure *structure;
GstCaps *newcaps;
GstV4lSrc *v4lsrc = GST_V4LSRC (gst_pad_get_parent (pad));
struct video_capability *vcap = &GST_V4LELEMENT (v4lsrc)->vcap;
if (gst_caps_get_size (caps) > 1)
return NULL;
if (!vcap) {
GST_DEBUG_OBJECT (v4lsrc, "don't have device caps, cannot fixate");
return NULL;
}
newcaps = gst_caps_copy (caps);
structure = gst_caps_get_structure (newcaps, 0);
GST_DEBUG_OBJECT (v4lsrc, "device reported w: %d-%d, h: %d-%d",
vcap->minwidth, vcap->maxwidth, vcap->minheight, vcap->maxheight);
if (gst_caps_structure_fixate_field_nearest_int (structure, "width",
vcap->maxwidth)) {
return newcaps;
}
if (gst_caps_structure_fixate_field_nearest_int (structure, "height",
vcap->maxheight)) {
return newcaps;
}
gst_caps_free (newcaps);
return NULL;
}
static GstCaps *
gst_v4lsrc_getcaps (GstPad * pad)
@ -595,10 +628,12 @@ gst_v4lsrc_getcaps (GstPad * pad)
one = gst_v4lsrc_palette_to_caps (GPOINTER_TO_INT (item->data));
if (!one)
g_print ("Palette %d gave no caps\n", GPOINTER_TO_INT (item->data));
gst_caps_set_simple (one,
"width", GST_TYPE_INT_RANGE, vcap->minwidth, vcap->maxwidth,
"height", GST_TYPE_INT_RANGE, vcap->minheight, vcap->maxheight,
"framerate", G_TYPE_DOUBLE, gst_v4lsrc_get_fps (v4lsrc), NULL);
GST_DEBUG_OBJECT (v4lsrc, "Device reports w: %d-%d, h: %d-%d",
vcap->minwidth, vcap->maxwidth, vcap->minheight, vcap->maxheight);
gst_caps_set_simple (one, "width", GST_TYPE_INT_RANGE, vcap->minwidth,
vcap->maxwidth, "height", GST_TYPE_INT_RANGE, vcap->minheight,
vcap->maxheight, "framerate", G_TYPE_DOUBLE,
gst_v4lsrc_get_fps (v4lsrc), NULL);
gst_caps_append (list, one);
}