+/**
+ * reads 0-32 bits.
+ */
+static inline unsigned int get_bits_long(GetBitContext *s, int n){
+ if(n<=17) return get_bits(s, n);
+ else{
+#ifdef ALT_BITSTREAM_READER_LE
+ int ret= get_bits(s, 16);
+ return ret | (get_bits(s, n-16) << 16);
+#else
+ int ret= get_bits(s, 16) << (n-16);
+ return ret | get_bits(s, n-16);
+#endif
+ }
+}
+
+/**
+ * shows 0-32 bits.
+ */
+static inline unsigned int show_bits_long(GetBitContext *s, int n){
+ if(n<=17) return show_bits(s, n);
+ else{
+ GetBitContext gb= *s;
+ int ret= get_bits_long(s, n);
+ *s= gb;
+ return ret;
+ }
+}
+
+static inline int check_marker(GetBitContext *s, const char *msg)
+{
+ int bit= get_bits1(s);
+ if(!bit)
+ av_log(NULL, AV_LOG_INFO, "Marker bit missing %s\n", msg);
+
+ return bit;
+}
+