[FFmpeg-cvslog] avcodec/binkaudio: Fix 2Ghz sample_rate

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Sun Apr 19 17:05:53 2020 +0200| [0c914ee968123687778800ac0b438130761c98d7] | committer: Michael Niedermayer

avcodec/binkaudio: Fix 2Ghz sample_rate

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 19950/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_BINKAUDIO_DCT_fuzzer-5765514337189888

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Suggested-by: Paul
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit f603d10b1e6bb2fbf4dcccc43d3ea2fb911b36ba)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0c914ee968123687778800ac0b438130761c98d7
---

 libavcodec/binkaudio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/binkaudio.c b/libavcodec/binkaudio.c
index e1c96aa1b1..21e737a196 100644
--- a/libavcodec/binkaudio.c
+++ b/libavcodec/binkaudio.c
@@ -107,7 +107,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
     s->frame_len     = 1 << frame_len_bits;
     s->overlap_len   = s->frame_len / 16;
     s->block_size    = (s->frame_len - s->overlap_len) * s->channels;
-    sample_rate_half = (sample_rate + 1) / 2;
+    sample_rate_half = (sample_rate + 1LL) / 2;
     if (avctx->codec->id == AV_CODEC_ID_BINKAUDIO_RDFT)
         s->root = 2.0 / (sqrt(s->frame_len) * 32768.0);
     else