[FFmpeg-cvslog] avcodec/on2avc: Use least max_depth for get_vlc2()

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Sun Oct 18 07:46:16 2020 +0200| [bce8e2f374db390d50ec79a6288a607782cca64a] | committer: Andreas Rheinhardt

avcodec/on2avc: Use least max_depth for get_vlc2()

The longest codes of any VLC codebooks are 18 bits long and the VLC
tables itself use 9 bits; therefore it is sufficient to read twice from
the table, yet this has been done thrice.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=bce8e2f374db390d50ec79a6288a607782cca64a
---

 libavcodec/on2avc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/on2avc.c b/libavcodec/on2avc.c
index e54c23cb1c..625e733ca3 100644
--- a/libavcodec/on2avc.c
+++ b/libavcodec/on2avc.c
@@ -195,7 +195,7 @@ static int on2avc_decode_quads(On2AVCContext *c, GetBitContext *gb, float *dst,
     int i, j, val, val1;
 
     for (i = 0; i < dst_size; i += 4) {
-        val = get_vlc2(gb, c->cb_vlc[type].table, 9, 3);
+        val = get_vlc2(gb, c->cb_vlc[type].table, 9, 2);
 
         for (j = 0; j < 4; j++) {
             val1 = sign_extend((val >> (12 - j * 4)) & 0xF, 4);
@@ -228,7 +228,7 @@ static int on2avc_decode_pairs(On2AVCContext *c, GetBitContext *gb, float *dst,
     int i, val, val1, val2, sign;
 
     for (i = 0; i < dst_size; i += 2) {
-        val = get_vlc2(gb, c->cb_vlc[type].table, 9, 3);
+        val = get_vlc2(gb, c->cb_vlc[type].table, 9, 2);
 
         val1 = sign_extend(val >> 8,   8);
         val2 = sign_extend(val & 0xFF, 8);