[FFmpeg-cvslog] sipr: fix get_bits(0) calls

[Mans Rullgard]

ffmpeg | branch: release/0.8 | Mans Rullgard <mans at mansr.com> | Mon Oct 10 20:41:31 2011 +0100| [3b7a1ba90ec94fe052b6ea085ae6f3f3bfd9ba27] | committer: Reinhard Tartler

sipr: fix get_bits(0) calls

Zero-length get_bits() is undefined, must check before calling.

Signed-off-by: Mans Rullgard <mans at mansr.com>
(cherry picked from commit c79d2a20bad59298188171f1316a830d563a41ee)

Signed-off-by: Anton Khirnov <anton at khirnov.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3b7a1ba90ec94fe052b6ea085ae6f3f3bfd9ba27
---

 libavcodec/sipr.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/libavcodec/sipr.c b/libavcodec/sipr.c
index fa57b43..ccd0eeb 100644
--- a/libavcodec/sipr.c
+++ b/libavcodec/sipr.c
@@ -194,14 +194,16 @@ static void decode_parameters(SiprParameters* parms, GetBitContext *pgb,
 {
     int i, j;
 
-    parms->ma_pred_switch           = get_bits(pgb, p->ma_predictor_bits);
+    if (p->ma_predictor_bits)
+        parms->ma_pred_switch       = get_bits(pgb, p->ma_predictor_bits);
 
     for (i = 0; i < 5; i++)
         parms->vq_indexes[i]        = get_bits(pgb, p->vq_indexes_bits[i]);
 
     for (i = 0; i < p->subframe_count; i++) {
         parms->pitch_delay[i]       = get_bits(pgb, p->pitch_delay_bits[i]);
-        parms->gp_index[i]          = get_bits(pgb, p->gp_index_bits);
+        if (p->gp_index_bits)
+            parms->gp_index[i]      = get_bits(pgb, p->gp_index_bits);
 
         for (j = 0; j < p->number_of_fc_indexes; j++)
             parms->fc_indexes[i][j] = get_bits(pgb, p->fc_index_bits[j]);