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amrparse: 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 09:53:18 +01:00
parent 5203b0884a
commit c5b770df09
1 changed files with 38 additions and 0 deletions
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38
gst/audioparsers/gstamrparse.c
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@ -76,6 +76,7 @@ static gboolean gst_amr_parse_stop (GstBaseParse * parse);
static gboolean gst_amr_parse_sink_setcaps (GstBaseParse * parse,
GstCaps * caps);
static GstCaps *gst_amr_parse_sink_getcaps (GstBaseParse * parse);
static gboolean gst_amr_parse_check_valid_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, guint * framesize, gint * skipsize);
@ -125,6 +126,7 @@ gst_amr_parse_class_init (GstAmrParseClass * klass)
parse_class->start = GST_DEBUG_FUNCPTR (gst_amr_parse_start);
parse_class->stop = GST_DEBUG_FUNCPTR (gst_amr_parse_stop);
parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_amr_parse_sink_setcaps);
parse_class->get_sink_caps = GST_DEBUG_FUNCPTR (gst_amr_parse_sink_getcaps);
parse_class->parse_frame = GST_DEBUG_FUNCPTR (gst_amr_parse_parse_frame);
parse_class->check_valid_frame =
GST_DEBUG_FUNCPTR (gst_amr_parse_check_valid_frame);
@ -392,3 +394,39 @@ gst_amr_parse_stop (GstBaseParse * parse)
amrparse->header = 0;
return TRUE;
}
static GstCaps *
gst_amr_parse_sink_getcaps (GstBaseParse * parse)
{
GstCaps *peercaps;
GstCaps *res;
peercaps = gst_pad_get_allowed_caps (GST_BASE_PARSE_SRC_PAD (parse));
if (peercaps) {
guint i, n;
/* Rename structure names */
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);
if (gst_structure_has_name (s, "audio/AMR"))
gst_structure_set_name (s, "audio/x-amr-nb-sh");
else
gst_structure_set_name (s, "audio/x-amr-wb-sh");
}
res =
gst_caps_intersect_full (peercaps,
gst_pad_get_pad_template_caps (GST_BASE_PARSE_SRC_PAD (parse)),
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (peercaps);
} else {
res =
gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_PARSE_SRC_PAD
(parse)));
}
return res;
}