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diracparse: Implement ::get_sink_caps vfunc to propagate downstream caps constraints upstream

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This commit is contained in:
Sebastian Dröge 2011-11-24 10:08:27 +01:00
parent e7cd086970
commit b10c1f277f
1 changed files with 35 additions and 0 deletions
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35
gst/videoparsers/gstdiracparse.c
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@ -54,6 +54,7 @@ static gboolean gst_dirac_parse_start (GstBaseParse * parse);
static gboolean gst_dirac_parse_stop (GstBaseParse * parse);
static gboolean gst_dirac_parse_set_sink_caps (GstBaseParse * parse,
GstCaps * caps);
static GstCaps *gst_dirac_parse_get_sink_caps (GstBaseParse * parse);
static gboolean gst_dirac_parse_check_valid_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, guint * framesize, gint * skipsize);
static GstFlowReturn gst_dirac_parse_parse_frame (GstBaseParse * parse,
@ -127,6 +128,8 @@ gst_dirac_parse_class_init (GstDiracParseClass * klass)
base_parse_class->stop = GST_DEBUG_FUNCPTR (gst_dirac_parse_stop);
base_parse_class->set_sink_caps =
GST_DEBUG_FUNCPTR (gst_dirac_parse_set_sink_caps);
base_parse_class->get_sink_caps =
GST_DEBUG_FUNCPTR (gst_dirac_parse_get_sink_caps);
base_parse_class->check_valid_frame =
GST_DEBUG_FUNCPTR (gst_dirac_parse_check_valid_frame);
base_parse_class->parse_frame =
@ -378,3 +381,35 @@ gst_dirac_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
return GST_FLOW_OK;
}
static GstCaps *
gst_dirac_parse_get_sink_caps (GstBaseParse * parse)
{
GstCaps *peercaps;
GstCaps *res;
peercaps = gst_pad_get_allowed_caps (GST_BASE_PARSE_SRC_PAD (parse));
if (peercaps) {
guint i, n;
/* Remove the parsed field */
peercaps = gst_caps_make_writable (peercaps);
n = gst_caps_get_size (peercaps);
for (i = 0; i < n; i++) {
GstStructure *s = gst_caps_get_structure (peercaps, i);
gst_structure_remove_field (s, "parsed");
}
res =
gst_caps_intersect_full (peercaps,
gst_pad_get_pad_template_caps (GST_BASE_PARSE_SINK_PAD (parse)),
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (peercaps);
} else {
res =
gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_PARSE_SINK_PAD
(parse)));
}
return res;
}