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applemedia: vtdec: fix negotiation more

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Year 12: I still don't understand how negotiation works.

Apparently gst_pad_query_caps doesn't do what I thought it did. To get the
actual caps that can flow through vtdec:src we must call gst_pad_peer_query_caps
with the template caps as filter.

Fixes negotiation with stuff that doesn't understand GLMemory (hello videoscale).
This commit is contained in:
Alessandro Decina 2015-11-17 16:08:17 +11:00
parent 94cd5316f3
commit 3d5a1ccbf4
1 changed files with 6 additions and 3 deletions
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9
sys/applemedia/vtdec.c
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@ -267,7 +267,7 @@ static gboolean
gst_vtdec_negotiate (GstVideoDecoder * decoder)
{
GstVideoCodecState *output_state = NULL;
GstCaps *caps = NULL, *prevcaps = NULL;
GstCaps *caps = NULL, *templcaps = NULL, *prevcaps = NULL;
GstVideoFormat format;
GstStructure *structure;
const gchar *s;
@ -276,9 +276,12 @@ gst_vtdec_negotiate (GstVideoDecoder * decoder)
gboolean ret = TRUE;
vtdec = GST_VTDEC (decoder);
templcaps =
gst_pad_get_pad_template_caps (GST_VIDEO_DECODER_SRC_PAD (decoder));
caps =
gst_caps_make_writable (gst_pad_query_caps (GST_VIDEO_DECODER_SRC_PAD
(vtdec), NULL));
gst_caps_make_writable (gst_pad_peer_query_caps (GST_VIDEO_DECODER_SRC_PAD
(vtdec), templcaps));
gst_caps_unref (templcaps);
context = query_gl_context (vtdec);
if (!context)
gst_caps_filter_and_map_in_place (caps, caps_filter_out_gl_memory, NULL);