Changeset 150 for libmpc/branches/r2d/libmpcdec/mpc_bits_reader.c

Timestamp:

11/24/06 19:18:18 (18 years ago)

Author:

r2d

Message:

• updated libmpcenc / libmpcdec according to the spec
• added seek table loading from file in libmpcdec

File:

• libmpc/branches/r2d/libmpcdec/mpc_bits_reader.c (modified) (1 diff)

libmpc/branches/r2d/libmpcdec/mpc_bits_reader.c

@@ -68 +68 @@
 }
 
+mpc_int32_t mpc_bits_golomb_dec(mpc_bits_reader * r, const mpc_uint_t k)
+{
+        unsigned int l = 0;
+        unsigned int code = r->buff[0] & ((1 << r->count) - 1);
+
+        while( code == 0 ) {
+                l += r->count;
+                r->buff++;
+                code = r->buff[0];
+                r->count = 8;
+        }
+
+        while( ((1 << (r->count - 1)) & code) == 0 ) {
+                l++;
+                r->count--;
+        }
+        r->count--;
+
+        while( r->count < k ) {
+                r->buff++;
+                r->count += 8;
+                code = (code << 8) | r->buff[0];
+        }
+
+        r->count -= k;
+
+        return (l << k) | ((code >> r->count) & ((1 << k) - 1));
+}
+
 unsigned int mpc_bits_get_size(mpc_bits_reader * r, mpc_uint64_t * p_size)
 {