xan: Convert to the new bitstream reader

libavcodec/xan.c

@@ -37,8 +37,8 @@
 
 #define BITSTREAM_READER_LE
 #include "avcodec.h"
+#include "bitstream.h"
 #include "bytestream.h"
-#include "get_bits.h"
 #include "internal.h"
 
 #define RUNTIME_GAMMA 0
@@ -124,15 +124,15 @@ static int xan_huffman_decode(unsigned char *dest, int dest_len,
     unsigned char val = ival;
     unsigned char *dest_end = dest + dest_len;
     unsigned char *dest_start = dest;
-    GetBitContext gb;
+    BitstreamContext bc;
 
     if (ptr_len < 0)
         return AVERROR_INVALIDDATA;
 
-    init_get_bits(&gb, ptr, ptr_len * 8);
+    bitstream_init(&bc, ptr, ptr_len * 8);
 
     while (val != 0x16) {
-        unsigned idx = val - 0x17 + get_bits1(&gb) * byte;
+        unsigned idx = val - 0x17 + bitstream_read_bit(&bc) * byte;
         if (idx >= 2 * byte)
             return AVERROR_INVALIDDATA;
         val = src[idx];