Make get_bits_left() available for use in libavcodec (was previously held

private in dv.c for some reason). See "[PATCH] get_bits_left()" thread.

Originally committed as revision 20490 to svn://svn.ffmpeg.org/ffmpeg/trunk
(cherry picked from commit c47ca25e74)

libavcodec/bitstream.h

@@ -946,4 +946,9 @@ static inline int decode210(GetBitContext *gb){
         return 2 - get_bits1(gb);
 }
 
+static inline int get_bits_left(GetBitContext *gb)
+{
+    return gb->size_in_bits - get_bits_count(gb);
+}
+
 #endif /* AVCODEC_BITSTREAM_H */

libavcodec/dv.c

@@ -414,11 +414,6 @@ static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
 /* see dv_88_areas and dv_248_areas for details */
 static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
 
-static inline int get_bits_left(GetBitContext *s)
-{
-    return s->size_in_bits - get_bits_count(s);
-}
-
 static inline int put_bits_left(PutBitContext* s)
 {
     return (s->buf_end - s->buf) * 8 - put_bits_count(s);