avcodec/pnmdec: fix decoding with AVFrame's negative linesize

1 year ago · 5d98259841
parent cdf0931fdb
commit 5d98259841
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/pnmdec.c
+++ b/libavcodec/pnmdec.c
@ -137,7 +137,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, AVFrame *p,
        if(s->type < 4 || (is_mono && s->type==7)){
            for (i=0; i<avctx->height; i++) {
                PutBitContext pb;
-                init_put_bits(&pb, ptr, linesize);
+                init_put_bits(&pb, ptr, FFABS(linesize));
                for(j=0; j<avctx->width * components; j++){
                    unsigned int c=0;
                    unsigned v=0;