[FFmpeg-cvslog] ac3enc: return error if frame+exponent bits are too large instead of using

[Justin Ruggles]

ffmpeg | branch: master | Justin Ruggles <justin.ruggles at gmail.com> | Fri Apr 15 19:56:42 2011 -0400| [4142487d1cd8c555e13f156d1cc89f838099db10] | committer: Justin Ruggles

ac3enc: return error if frame+exponent bits are too large instead of using
av_assert2().

This can occur in some very rare cases with low bitrates.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4142487d1cd8c555e13f156d1cc89f838099db10
---

 libavcodec/ac3enc.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index 00cb047..47fd9b6 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -1052,7 +1052,8 @@ static int cbr_bit_allocation(AC3EncodeContext *s)
     int snr_offset, snr_incr;
 
     bits_left = 8 * s->frame_size - (s->frame_bits + s->exponent_bits);
-    av_assert2(bits_left >= 0);
+    if (bits_left < 0)
+        return AVERROR(EINVAL);
 
     snr_offset = s->coarse_snr_offset << 4;