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jpegdec: Implement upstream negotiation

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Add upstream negotiation for jpegdec. Fixes #660275
This commit is contained in:
Sjoerd Simons 2011-09-27 19:25:53 +01:00
parent ad245a0dc2
commit 95db648516
1 changed files with 47 additions and 0 deletions
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47
ext/jpeg/gstjpegdec.c
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@ -113,6 +113,7 @@ static void gst_jpeg_dec_get_property (GObject * object, guint prop_id,
static GstFlowReturn gst_jpeg_dec_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_jpeg_dec_setcaps (GstPad * pad, GstCaps * caps);
static GstCaps *gst_jpeg_dec_getcaps (GstPad * pad);
static gboolean gst_jpeg_dec_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_jpeg_dec_src_event (GstPad * pad, GstEvent * event);
static GstStateChangeReturn gst_jpeg_dec_change_state (GstElement * element,
@ -406,6 +407,8 @@ gst_jpeg_dec_init (GstJpegDec * dec)
gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
gst_pad_set_setcaps_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_jpeg_dec_setcaps));
gst_pad_set_getcaps_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_jpeg_dec_getcaps));
gst_pad_set_chain_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_jpeg_dec_chain));
gst_pad_set_event_function (dec->sinkpad,
@ -769,6 +772,50 @@ gst_jpeg_dec_setcaps (GstPad * pad, GstCaps * caps)
return TRUE;
}
static GstCaps *
gst_jpeg_dec_getcaps (GstPad * pad)
{
GstJpegDec *dec;
GstCaps *caps;
GstPad *peer;
dec = GST_JPEG_DEC (GST_OBJECT_PARENT (pad));
if (GST_PAD_CAPS (pad))
return gst_caps_ref (GST_PAD_CAPS (pad));
peer = gst_pad_get_peer (dec->srcpad);
if (peer) {
GstCaps *peer_caps;
const GstCaps *templ_caps;
GstStructure *s;
guint i, n;
peer_caps = gst_pad_get_caps (peer);
/* Translate peercaps to image/jpeg */
peer_caps = gst_caps_make_writable (peer_caps);
n = gst_caps_get_size (peer_caps);
for (i = 0; i < n; i++) {
s = gst_caps_get_structure (peer_caps, i);
gst_structure_set_name (s, "image/jpeg");
}
templ_caps = gst_pad_get_pad_template_caps (pad);
caps = gst_caps_intersect_full (peer_caps, templ_caps,
GST_CAPS_INTERSECT_FIRST);
gst_object_unref (peer);
} else {
caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
}
return caps;
}
/* yuk */
static void
hresamplecpy1 (guint8 * dest, const guint8 * src, guint len)