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decoder: vp9: Update comment about context resets

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Clarify that vaapi context resets are never needed for vp9, but
that ensure_context() needs called when the size increases so that
new surfaces can be allocated.

Signed-off-by: Scott D Phillips <scott.d.phillips@intel.com>

https://bugzilla.gnome.org/show_bug.cgi?id=767474
This commit is contained in:
Scott D Phillips 2016-06-15 11:25:23 -07:00 committed by Víctor Manuel Jáquez Leal
parent ad9fcb9386
commit 57ee937b8c
1 changed files with 4 additions and 3 deletions
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7
gst-libs/gst/vaapi/gstvaapidecoder_vp9.c
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@ -600,9 +600,10 @@ parse_frame_header (GstVaapiDecoderVp9 * decoder, const guchar * buf,
return get_status (result);
/* Unlike other decoders, vp9 decoder doesn't need to reset the
* whole context and surfaces for each resolution change. context
* reset only needed if resolution of any frame is greater than
* what actullay configured. There are streams where a bigger
* whole context and surfaces for each resolution change. Calling
* ensure_context() again is only needed if the resolution of any frame
* is greater than what was previously configured, so that new, larger
* surfaces can be allocated. There are streams where a bigger
* resolution set in ivf header or webm header but actual resolution
* of all frames are less. Also it is possible to have inter-prediction
* between these multi resolution frames */