including libdts as experimental DTS decoder

(xine wrapper code by James Stembridge)
does not work on all DVDs, but better a sometimes failing decoder than no
decoder at all; digital passthrough seems unaffected

CVS patchset: 6361
CVS date: 2004/04/09 14:57:25

1 files changed, 67 insertions, 0 deletions

diff --git a/src/libdts/bitstream.h b/src/libdts/bitstream.h
new file mode 100644
index 000000000..105dc0e9b
--- /dev/null
+++ b/src/libdts/bitstream.h
@@ -0,0 +1,67 @@
+/*
+ * 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 dtsdec, a free DTS Coherent Acoustics stream decoder.
+ * See http://www.videolan.org/dtsdec.html for updates.
+ *
+ * dtsdec 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.
+ *
+ * dtsdec 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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)\
+((((uint16_t*)&x)[0] << 16) | (((uint16_t*)&x)[1]))
+
+#endif
+
+void dts_bitstream_init (dts_state_t * state, uint8_t * buf, int word_mode,
+                         int endian_mode);
+uint32_t dts_bitstream_get_bh (dts_state_t * state, uint32_t num_bits);
+
+static inline uint32_t bitstream_get (dts_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 dts_bitstream_get_bh (state, num_bits);
+}