From 0b374e40b1df87d21c6870e998849dd51027c637 Mon Sep 17 00:00:00 2001
From: Diego Biurrun <diego@biurrun.de>
Date: Mon, 24 May 2010 02:27:43 +0000
Subject: [PATCH] Convert NaN to 0/0 in av_d2q

This fixes aspect ratio calculation for encoding from files with 0/0 stored,
common with ogg/theora

backport r23280 by conrad


Originally committed as revision 23283 to svn://svn.ffmpeg.org/ffmpeg/branches/0.6
---
 libavutil/rational.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavutil/rational.c b/libavutil/rational.c
index 3217b7daeb..3e8b885d49 100644
--- a/libavutil/rational.c
+++ b/libavutil/rational.c
@@ -98,6 +98,8 @@ AVRational av_d2q(double d, int max){
 #define LOG2  0.69314718055994530941723212145817656807550013436025
     int exponent= FFMAX( (int)(log(fabs(d) + 1e-20)/LOG2), 0);
     int64_t den= 1LL << (61 - exponent);
+    if (isnan(d))
+        return (AVRational){0,0};
     av_reduce(&a.num, &a.den, (int64_t)(d * den + 0.5), den, max);
 
     return a;