1 files changed, 68 insertions, 0 deletions
diff --git a/contrib/libdca/bitstream.h b/contrib/libdca/bitstream.h
new file mode 100644
index 000000000..4bce80aab
--- /dev/null
+++ b/contrib/libdca/bitstream.h
@@ -0,0 +1,68 @@
+/*
+ * bitstream.h
+ * Copyright (C) 2004 Gildas Bazin <gbazin@videolan.org>
+ * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of libdca, a free DTS Coherent Acoustics stream decoder.
+ * See http://www.videolan.org/developers/libdca.html for updates.
+ *
+ * libdca is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * libdca is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef WORDS_BIGENDIAN
+
+#   define swab32(x) (x)
+
+#else
+
+#   define swab32(x)\
+((((uint8_t*)&x)[0] << 24) | (((uint8_t*)&x)[1] << 16) |  \
+ (((uint8_t*)&x)[2] << 8)  | (((uint8_t*)&x)[3]))
+
+#endif
+
+#ifdef WORDS_BIGENDIAN
+
+#   define swable32(x)\
+((((uint8_t*)&x)[0] << 16) | (((uint8_t*)&x)[1] << 24) |  \
+ (((uint8_t*)&x)[2])  | (((uint8_t*)&x)[3] << 8))
+
+#else
+
+#   define swable32(x)\
+((((uint32_t)x) >> 16) | (((uint32_t)x) << 16))
+
+#endif
+
+void dca_bitstream_init (dca_state_t * state, uint8_t * buf, int word_mode,
+                         int endian_mode);
+uint32_t dca_bitstream_get_bh (dca_state_t * state, uint32_t num_bits);
+
+static inline uint32_t bitstream_get (dca_state_t * state, uint32_t num_bits)
+{
+    uint32_t result;
+
+    if (num_bits < state->bits_left) {
+        result = (state->current_word << (32 - state->bits_left))
+				      >> (32 - num_bits);
+
+        state->bits_left -= num_bits;
+        return result;
+    }
+
+    return dca_bitstream_get_bh (state, num_bits);
+}