svq1dec: avoid undefined get_bits(0) call

Signed-off-by: Mans Rullgard <mans@mansr.com>
13 years ago · 51a16077da
parent 59807fee6d
commit 51a16077da
1 changed files with 2 additions and 1 deletions
--- a/libavcodec/svq1dec.c
+++ b/libavcodec/svq1dec.c
@ -195,7 +195,8 @@ static const uint8_t string_table[256] = {

 #define SVQ1_CALC_CODEBOOK_ENTRIES(cbook)\
      codebook = (const uint32_t *) cbook[level];\
-      bit_cache = get_bits (bitbuf, 4*stages);\
+      if (stages > 0)\
+        bit_cache = get_bits (bitbuf, 4*stages);\
      /* calculate codebook entries for this vector */\
      for (j=0; j < stages; j++) {\
        entries[j] = (((bit_cache >> (4*(stages - j - 1))) & 0xF) + 16*j) << (level + 1);\