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avcodec/vaapi: mask unused bits in bitplane_present.value

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Due to the union construct, unused bits in bitplane_present.value might
be uninitialized even when the used bits are all set to a value.
Masking the unused bits prevents spurious true values when all used
bits are unset, e.g. skipped pictures.

Signed-off-by: Jerome Borsboom <jerome.borsboom@carpalis.nl>
This commit is contained in:
Jerome Borsboom 2018-02-25 20:13:46 +01:00 committed by Mark Thompson
parent 883bdc5fb7
commit 0ec7eb9305
1 changed files with 1 additions and 1 deletions
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2
libavcodec/vaapi_vc1.c
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@ -383,7 +383,7 @@ static int vaapi_vc1_start_frame(AVCodecContext *avctx, av_unused const uint8_t
if (err)
goto fail;
if (pic_param.bitplane_present.value) {
if (pic_param.bitplane_present.value & 0x7f) {
uint8_t *bitplane;
const uint8_t *ff_bp[3];
int x, y, n;