exr: Convert to the new bitstream reader

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

libavcodec/exr.c

@@ -39,8 +39,8 @@
 #include "libavutil/opt.h"
 
 #include "avcodec.h"
+#include "bitstream.h"
 #include "bytestream.h"
-#include "get_bits.h"
 #include "internal.h"
 #include "mathops.h"
 #include "thread.h"
@@ -379,16 +379,16 @@ static void huf_canonical_code_table(uint64_t *hcode)
 static int huf_unpack_enc_table(GetByteContext *gb,
                                 int32_t im, int32_t iM, uint64_t *hcode)
 {
-    GetBitContext gbit;
-    int ret = init_get_bits8(&gbit, gb->buffer, bytestream2_get_bytes_left(gb));
+    BitstreamContext bc;
+    int ret = bitstream_init8(&bc, gb->buffer, bytestream2_get_bytes_left(gb));
     if (ret < 0)
         return ret;
 
     for (; im <= iM; im++) {
-        uint64_t l = hcode[im] = get_bits(&gbit, 6);
+        uint64_t l = hcode[im] = bitstream_read(&bc, 6);
 
         if (l == LONG_ZEROCODE_RUN) {
-            int zerun = get_bits(&gbit, 8) + SHORTEST_LONG_RUN;
+            int zerun = bitstream_read(&bc, 8) + SHORTEST_LONG_RUN;
 
             if (im + zerun > iM + 1)
                 return AVERROR_INVALIDDATA;
@@ -410,7 +410,7 @@ static int huf_unpack_enc_table(GetByteContext *gb,
         }
     }
 
-    bytestream2_skip(gb, (get_bits_count(&gbit) + 7) / 8);
+    bytestream2_skip(gb, (bitstream_tell(&bc) + 7) / 8);
     huf_canonical_code_table(hcode);
 
     return 0;