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h264: er: Copy from the previous reference only if compatible 

Also use the frame pixel format instead of the one from the codec
context, which is more robust.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-06-14 12:40:18 +02:00 committed by Andreas Cadhalpun
parent 96bbbebaf9
commit fdc64a1044
1 changed files with 5 additions and 2 deletions
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7
libavcodec/h264_slice.c
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@ -1552,12 +1552,15 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl)
* vectors. Given we are concealing a lost frame, this probably
* is not noticeable by comparison, but it should be fixed. */
if (h->short_ref_count) {
if (prev) {
if (prev &&
h->short_ref[0]->f->width == prev->f->width &&
h->short_ref[0]->f->height == prev->f->height &&
h->short_ref[0]->f->format == prev->f->format) {
av_image_copy(h->short_ref[0]->f->data,
h->short_ref[0]->f->linesize,
(const uint8_t **)prev->f->data,
prev->f->linesize,
h->avctx->pix_fmt,
prev->f->format,
h->mb_width * 16,
h->mb_height * 16);
h->short_ref[0]->poc = prev->poc + 2;