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xvidenc: Implement getcaps function

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This allows to set width/height/etc restrictions to be set downstream.

Fixes bug #647498.
This commit is contained in:
Sebastian Dröge 2011-04-13 20:26:11 +02:00
parent 6b4e797513
commit d309cd5771
1 changed files with 50 additions and 0 deletions
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50
ext/xvid/gstxvidenc.c
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@ -79,6 +79,7 @@ static void gst_xvidenc_init (GstXvidEnc * xvidenc);
static void gst_xvidenc_finalize (GObject * object); static void gst_xvidenc_finalize (GObject * object);
static GstFlowReturn gst_xvidenc_chain (GstPad * pad, GstBuffer * data); static GstFlowReturn gst_xvidenc_chain (GstPad * pad, GstBuffer * data);
static gboolean gst_xvidenc_setcaps (GstPad * pad, GstCaps * vscapslist); static gboolean gst_xvidenc_setcaps (GstPad * pad, GstCaps * vscapslist);
static GstCaps *gst_xvidenc_getcaps (GstPad * pad);
static void gst_xvidenc_flush_buffers (GstXvidEnc * xvidenc, gboolean send); static void gst_xvidenc_flush_buffers (GstXvidEnc * xvidenc, gboolean send);
static gboolean gst_xvidenc_handle_sink_event (GstPad * pad, GstEvent * event); static gboolean gst_xvidenc_handle_sink_event (GstPad * pad, GstEvent * event);
@ -497,6 +498,8 @@ gst_xvidenc_init (GstXvidEnc * xvidenc)
GST_DEBUG_FUNCPTR (gst_xvidenc_chain)); GST_DEBUG_FUNCPTR (gst_xvidenc_chain));
gst_pad_set_setcaps_function (xvidenc->sinkpad, gst_pad_set_setcaps_function (xvidenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_xvidenc_setcaps)); GST_DEBUG_FUNCPTR (gst_xvidenc_setcaps));
gst_pad_set_getcaps_function (xvidenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_xvidenc_getcaps));
gst_pad_set_event_function (xvidenc->sinkpad, gst_pad_set_event_function (xvidenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_xvidenc_handle_sink_event)); GST_DEBUG_FUNCPTR (gst_xvidenc_handle_sink_event));
@ -794,6 +797,53 @@ gst_xvidenc_setcaps (GstPad * pad, GstCaps * vscaps)
return FALSE; return FALSE;
} }
static GstCaps *
gst_xvidenc_getcaps (GstPad * pad)
{
GstXvidEnc *xvidenc;
GstPad *peer;
GstCaps *caps;
/* If we already have caps return them */
if (GST_PAD_CAPS (pad))
return GST_PAD_CAPS (pad);
xvidenc = GST_XVIDENC (gst_pad_get_parent (pad));
if (!xvidenc)
return gst_caps_new_empty ();
peer = gst_pad_get_peer (xvidenc->srcpad);
if (peer) {
const GstCaps *templcaps;
GstCaps *peercaps;
guint i, n;
peercaps = gst_pad_get_caps (peer);
/* Translate peercaps to YUV */
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_set_name (s, "video/x-raw-yuv");
gst_structure_remove_field (s, "mpegversion");
gst_structure_remove_field (s, "systemstream");
}
templcaps = gst_pad_get_pad_template_caps (pad);
caps = gst_caps_intersect (peercaps, templcaps);
gst_caps_unref (peercaps);
} else {
caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
}
gst_object_unref (xvidenc);
return caps;
}
/* encodes frame according to info in xframe; /* encodes frame according to info in xframe;
- buf is input buffer, can be NULL if dummy - buf is input buffer, can be NULL if dummy
- buf is disposed of prior to exit - buf is disposed of prior to exit