Do not stop decoding on pnm files with negative maxval.

Originally committed as revision 26304 to svn://svn.ffmpeg.org/ffmpeg/trunk
14 years ago · 8219782a6d
parent c56e71309e
commit 8219782a6d
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/pnm.c
+++ b/libavcodec/pnm.c
@ -142,7 +142,7 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
        s->maxval = atoi(buf1);
        if (s->maxval <= 0) {
            av_log(avctx, AV_LOG_ERROR, "Invalid maxval: %d\n", s->maxval);
-            return -1;
+            s->maxval = 255;
        }
        if (s->maxval >= 256) {
            if (avctx->pix_fmt == PIX_FMT_GRAY8) {