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authorMichael Niedermayer <michaelni@gmx.at>2012-06-10 02:12:20 +0200
committerMichael Niedermayer <michaelni@gmx.at>2012-06-10 02:24:25 +0200
commitdfaf2dd956b0de1ec4c8c4bdf44fb9a689da643a (patch)
tree70c07dbfe771e727d0ef21e8c2f54ba96a6533a0 /libavcodec/h264.c
parent3275981207e30e140cffaea334ac390f1a04266a (diff)
downloadffmpeg-dfaf2dd956b0de1ec4c8c4bdf44fb9a689da643a.tar.gz
h264: use externally provided dimensions when they appear to be more correct.
This is based on: commit 30f515091c323da59c0f1b533703dedca2f4b95d Author: Mans Rullgard <mans@mansr.com> h264: allow cropping to AVCodecContext.width/height The above commit is not taken as is as its buggy (incorrect handling of the interlaced case) and didnt apply cleanly. Fixes ticket156 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/h264.c')
-rw-r--r--libavcodec/h264.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index e0d62e3b00..cb05508a80 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -2982,9 +2982,19 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
"Cannot (re-)initialize context during parallel decoding.\n");
return -1;
}
- avcodec_set_dimensions(s->avctx, s->width, s->height);
- s->avctx->width -= (2>>CHROMA444)*FFMIN(h->sps.crop_right, (8<<CHROMA444)-1);
- s->avctx->height -= (1<<s->chroma_y_shift)*FFMIN(h->sps.crop_bottom, (16>>s->chroma_y_shift)-1) * (2 - h->sps.frame_mbs_only_flag);
+ if( FFALIGN(s->avctx->width , 16 ) == s->width
+ && FFALIGN(s->avctx->height, 16*(2 - h->sps.frame_mbs_only_flag)) == s->height
+ && !h->sps.crop_right && !h->sps.crop_bottom
+ && (s->avctx->width != s->width || s->avctx->height && s->height)
+ ) {
+ av_log(h->s.avctx, AV_LOG_DEBUG, "Using externally provided dimensions\n");
+ s->avctx->coded_width = s->width;
+ s->avctx->coded_height = s->height;
+ } else{
+ avcodec_set_dimensions(s->avctx, s->width, s->height);
+ s->avctx->width -= (2>>CHROMA444)*FFMIN(h->sps.crop_right, (8<<CHROMA444)-1);
+ s->avctx->height -= (1<<s->chroma_y_shift)*FFMIN(h->sps.crop_bottom, (16>>s->chroma_y_shift)-1) * (2 - h->sps.frame_mbs_only_flag);
+ }
s->avctx->sample_aspect_ratio = h->sps.sar;
av_assert0(s->avctx->sample_aspect_ratio.den);