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Code Issues Releases Activity

VC1 VDPAU: Mark missing reference frames as such.

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Currently the code passes some nonsense values as
references instead, causing corruption with NVidia's
and assertion failures with Mesa's implementation.
For non-corrupted input this mostly happens in
interlaced bitstreams, e.g.
http://samples.mplayerhq.hu/V-codecs/WMV9/interlaced/480i30__codec_WVC1__mode_2__framerate_29.970__type_2__preproc_17.wmv.
The != VDP_INVALID handle assert does not trigger
(and probably is quite nonsense) because the frames
are initialized to 0.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
This commit is contained in:
Reimar Döffinger 2013-09-28 11:13:35 +02:00
parent ebb8dd437b
commit af6e232ccf
1 changed files with 4 additions and 0 deletions
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4
libavcodec/vdpau_vc1.c
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@ -44,14 +44,18 @@ static int vdpau_vc1_start_frame(AVCodecContext *avctx,
switch (s->pict_type) {
case AV_PICTURE_TYPE_B:
if (s->next_picture_ptr) {
ref = ff_vdpau_get_surface_id(&s->next_picture);
assert(ref != VDP_INVALID_HANDLE);
info->backward_reference = ref;
}
/* fall-through */
case AV_PICTURE_TYPE_P:
if (s->last_picture_ptr) {
ref = ff_vdpau_get_surface_id(&s->last_picture);
assert(ref != VDP_INVALID_HANDLE);
info->forward_reference = ref;
}
}
info->slice_count = 0;