[FFmpeg-cvslog] ac3_fixed: fix computation of spx_noise_blend

[Christophe Gisquet]

ffmpeg | branch: release/2.4 | Christophe Gisquet <christophe.gisquet at gmail.com> | Sat Mar 14 11:48:58 2015 +0000| [691f9dee0060458e5d3c36346af8c41cf9e74500] | committer: Michael Niedermayer

ac3_fixed: fix computation of spx_noise_blend

It was set to 1 instead of sqrt(3)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit c4bf3833f4663fd484441907f73c5bc4700021a4)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=691f9dee0060458e5d3c36346af8c41cf9e74500
---

 libavcodec/ac3dec.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index 80b9394..a0cdb5a 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -939,7 +939,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk)
                             nblend = 0;
                             sblend = 0x800000;
                         } else if (nratio > 0x7fffff) {
-                            nblend = 0x800000;
+                            nblend = 14529495; // sqrt(3) in FP.23
                             sblend = 0;
                         } else {
                             nblend = fixed_sqrt(nratio, 23);