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x264enc: Implement getcaps function

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This allows to set width/height/etc restrictions downstream.
This commit is contained in:
Sebastian Dröge 2011-04-13 20:31:53 +02:00
parent 1e6a607e01
commit e8d00e7334
1 changed files with 50 additions and 0 deletions
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50
ext/x264/gstx264enc.c
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@ -471,6 +471,7 @@ static gboolean gst_x264_enc_init_encoder (GstX264Enc * encoder);
static void gst_x264_enc_close_encoder (GstX264Enc * encoder);
static gboolean gst_x264_enc_sink_set_caps (GstPad * pad, GstCaps * caps);
static GstCaps *gst_x264_enc_sink_get_caps (GstPad * pad);
static gboolean gst_x264_enc_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_x264_enc_src_event (GstPad * pad, GstEvent * event);
static GstFlowReturn gst_x264_enc_chain (GstPad * pad, GstBuffer * buf);
@ -854,6 +855,8 @@ gst_x264_enc_init (GstX264Enc * encoder, GstX264EncClass * klass)
encoder->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_setcaps_function (encoder->sinkpad,
GST_DEBUG_FUNCPTR (gst_x264_enc_sink_set_caps));
gst_pad_set_getcaps_function (encoder->sinkpad,
GST_DEBUG_FUNCPTR (gst_x264_enc_sink_get_caps));
gst_pad_set_event_function (encoder->sinkpad,
GST_DEBUG_FUNCPTR (gst_x264_enc_sink_event));
gst_pad_set_chain_function (encoder->sinkpad,
@ -1454,6 +1457,53 @@ gst_x264_enc_sink_set_caps (GstPad * pad, GstCaps * caps)
return TRUE;
}
static GstCaps *
gst_x264_enc_sink_get_caps (GstPad * pad)
{
GstX264Enc *encoder;
GstPad *peer;
GstCaps *caps;
/* If we already have caps return them */
if (GST_PAD_CAPS (pad))
return GST_PAD_CAPS (pad);
encoder = GST_X264_ENC (gst_pad_get_parent (pad));
if (!encoder)
return gst_caps_new_empty ();
peer = gst_pad_get_peer (encoder->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, "stream-format");
gst_structure_remove_field (s, "alignment");
}
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 (encoder);
return caps;
}
static gboolean
gst_x264_enc_src_event (GstPad * pad, GstEvent * event)
{