Release synfig_0_61_05

[synfig.git] / synfig-core / tags / synfig_0_61_05 / synfig-core / src / modules / mod_libavcodec / libavcodec / liba52 / bitstream.h

diff --git a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/liba52/bitstream.h b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/liba52/bitstream.h
new file mode 100644 (file)
index 0000000..f559fbf
--- /dev/null
+++ b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/liba52/bitstream.h
@@ -0,0 +1,77 @@
+/*
+ * bitstream.h
+ * 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 a52dec, a free ATSC A-52 stream decoder.
+ * See http://liba52.sourceforge.net/ for updates.
+ *
+ * a52dec 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.
+ *
+ * a52dec 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
+ */
+
+/* (stolen from the kernel) */
+#ifdef WORDS_BIGENDIAN
+
+#      define swab32(x) (x)
+
+#else
+
+#      if 0 && defined (__i386__)
+
+#      define swab32(x) __i386_swab32(x)
+       static inline const uint32_t __i386_swab32(uint32_t x)
+       {
+               __asm__("bswap %0" : "=r" (x) : "0" (x));
+               return 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
+#endif
+
+void a52_bitstream_set_ptr (a52_state_t * state, uint8_t * buf);
+uint32_t a52_bitstream_get_bh (a52_state_t * state, uint32_t num_bits);
+int32_t a52_bitstream_get_bh_2 (a52_state_t * state, uint32_t num_bits);
+
+static inline uint32_t bitstream_get (a52_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 a52_bitstream_get_bh (state, num_bits);
+}
+
+static inline int32_t bitstream_get_2 (a52_state_t * state, uint32_t num_bits)
+{
+    int32_t result;
+       
+    if (num_bits < state->bits_left) {
+       result = (((int32_t)state->current_word) << (32 - state->bits_left)) >> (32 - num_bits);
+       state->bits_left -= num_bits;
+       return result;
+    }
+
+    return a52_bitstream_get_bh_2 (state, num_bits);
+}