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h264parse: Implement ::sink_get_caps to allow stream-format conversion again

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Just proxying the downstream caps will prevent h264parse from
accepting a different stream-format than what is supported
downstream, although it could convert to a different stream-format.
This commit is contained in:
Sebastian Dröge 2011-11-16 10:38:49 -08:00
parent 714ced7d19
commit f3f9e4b978
1 changed files with 34 additions and 0 deletions
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34
gst/videoparsers/gsth264parse.c
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@ -91,6 +91,7 @@ static void gst_h264_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec); GValue * value, GParamSpec * pspec);
static gboolean gst_h264_parse_set_caps (GstBaseParse * parse, GstCaps * caps); static gboolean gst_h264_parse_set_caps (GstBaseParse * parse, GstCaps * caps);
static GstCaps *gst_h264_parse_get_caps (GstBaseParse * parse);
static GstFlowReturn gst_h264_parse_chain (GstPad * pad, GstBuffer * buffer); static GstFlowReturn gst_h264_parse_chain (GstPad * pad, GstBuffer * buffer);
static void static void
@ -138,6 +139,7 @@ gst_h264_parse_class_init (GstH264ParseClass * klass)
parse_class->pre_push_frame = parse_class->pre_push_frame =
GST_DEBUG_FUNCPTR (gst_h264_parse_pre_push_frame); GST_DEBUG_FUNCPTR (gst_h264_parse_pre_push_frame);
parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_h264_parse_set_caps); parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_h264_parse_set_caps);
parse_class->get_sink_caps = GST_DEBUG_FUNCPTR (gst_h264_parse_get_caps);
} }
static void static void
@ -1336,6 +1338,38 @@ refuse_caps:
} }
} }
static GstCaps *
gst_h264_parse_get_caps (GstBaseParse * parse)
{
GstCaps *peercaps;
GstCaps *res;
peercaps = gst_pad_get_allowed_caps (GST_BASE_PARSE_SRC_PAD (parse));
if (peercaps) {
guint i, n;
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, "alignment");
gst_structure_remove_field (s, "stream-format");
}
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;
}
static GstFlowReturn static GstFlowReturn
gst_h264_parse_chain (GstPad * pad, GstBuffer * buffer) gst_h264_parse_chain (GstPad * pad, GstBuffer * buffer)
{ {