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colorspace: fix caps negotiation

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This commit is contained in:
Wim Taymans 2011-06-15 16:52:52 +02:00
parent edf33ec985
commit b94f979317
1 changed files with 29 additions and 63 deletions
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76
gst/colorspace/gstcolorspace.c
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@ -133,16 +133,25 @@ static GstCaps *
gst_csp_caps_remove_format_info (GstCaps * caps)
{
GstStructure *yuvst, *rgbst, *grayst;
gint i, n;
GstCaps *res;
/* We know there's only one structure since we're given simple caps */
caps = gst_caps_copy (caps);
res = gst_caps_new_empty ();
yuvst = gst_caps_get_structure (caps, 0);
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
yuvst = gst_caps_get_structure (caps, i);
/* If this is already expressed by the existing caps
* skip this structure */
if (i > 0 && gst_caps_is_subset_structure (res, yuvst))
continue;
yuvst = gst_structure_copy (yuvst);
gst_structure_set_name (yuvst, "video/x-raw-yuv");
gst_structure_remove_fields (yuvst, "format", "endianness", "depth",
"bpp", "red_mask", "green_mask", "blue_mask", "alpha_mask",
"palette_data", "color-matrix", NULL);
"palette_data", NULL);
rgbst = gst_structure_copy (yuvst);
gst_structure_set_name (rgbst, "video/x-raw-rgb");
@ -151,32 +160,12 @@ gst_csp_caps_remove_format_info (GstCaps * caps)
grayst = gst_structure_copy (rgbst);
gst_structure_set_name (grayst, "video/x-raw-gray");
gst_caps_append_structure (caps, rgbst);
gst_caps_append_structure (caps, grayst);
return caps;
}
static gboolean
gst_csp_structure_is_alpha (GstStructure * s)
{
GQuark name;
name = gst_structure_get_name_id (s);
if (name == _QRAWRGB) {
return gst_structure_id_has_field (s, _QALPHAMASK);
} else if (name == _QRAWYUV) {
guint32 fourcc;
if (!gst_structure_get_fourcc (s, "format", &fourcc))
return FALSE;
return (fourcc == GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'));
gst_caps_append_structure (res, yuvst);
gst_caps_append_structure (res, rgbst);
gst_caps_append_structure (res, grayst);
}
return FALSE;
return res;
}
/* The caps can be transformed into any other caps with format info removed.
@ -189,42 +178,20 @@ gst_csp_transform_caps (GstBaseTransform * btrans,
GstCaps *template;
GstCaps *tmp, *tmp2;
GstCaps *result;
GstStructure *s;
GstCaps *alpha, *non_alpha;
template = gst_static_pad_template_get_caps (&gst_csp_src_template);
result = gst_caps_copy (caps);
/* Get all possible caps that we can transform to */
tmp = gst_csp_caps_remove_format_info (caps);
tmp2 = gst_caps_intersect (tmp, template);
if (filter) {
tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (tmp);
tmp = tmp2;
/* Now move alpha formats to the beginning if caps is an alpha format
* or at the end if caps is no alpha format */
alpha = gst_caps_new_empty ();
non_alpha = gst_caps_new_empty ();
while ((s = gst_caps_steal_structure (tmp, 0))) {
if (gst_csp_structure_is_alpha (s))
gst_caps_append_structure (alpha, s);
else
gst_caps_append_structure (non_alpha, s);
}
s = gst_caps_get_structure (caps, 0);
gst_caps_unref (tmp);
if (gst_csp_structure_is_alpha (s)) {
gst_caps_append (alpha, non_alpha);
tmp = alpha;
} else {
gst_caps_append (non_alpha, alpha);
tmp = non_alpha;
}
gst_caps_append (result, tmp);
result = tmp;
GST_DEBUG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " into %"
GST_PTR_FORMAT, caps, result);
@ -463,7 +430,6 @@ gst_csp_class_init (GstCspClass * klass)
g_param_spec_enum ("dither", "Dither", "Apply dithering while converting",
dither_method_get_type (), DITHER_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void