Initial revision

1 files changed, 81 insertions, 0 deletions

diff --git a/jpwl/decoder/libopenjpeg/raw.c b/jpwl/decoder/libopenjpeg/raw.c
new file mode 100644
index 00000000..bae2e899
--- /dev/null
+++ b/jpwl/decoder/libopenjpeg/raw.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2002-2003, Antonin Descampe
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "raw.h"
+
+
+unsigned char raw_c;		/* temporary buffer where bits are coded or decoded */
+unsigned int raw_ct;		/* number of bits already read or free to write */
+unsigned int raw_lenmax;	/* maximum length to decode */
+unsigned int raw_len;		/* length decoded */
+unsigned char *raw_bp;		/* pointer to the current position in the buffer */
+unsigned char *raw_start;	/* pointer to the start of the buffer */
+unsigned char *raw_end;		/* pointer to the end of the buffer */
+
+/*
+ * Return the number of bytes already encoded.
+ */
+int raw_numbytes()
+{
+  return raw_bp - raw_start;
+}
+
+/*
+ * Initialize raw-decoder.
+ *
+ * bp  : pointer to the start of the buffer from which the bytes will be read
+ * len : length of the input buffer
+ */
+void raw_init_dec(unsigned char *bp, int len)
+{
+  raw_start = bp;
+  raw_lenmax = len;
+  raw_len = 0;
+  raw_c = 0;
+  raw_ct = 0;
+}
+
+/*
+ * Decode a symbol using raw-decoder. Cfr p.506 TAUBMAN
+ */
+int raw_decode()
+{
+  int d;
+  if (raw_ct == 0) {
+    raw_ct = 8;
+    if (raw_len == raw_lenmax)
+      raw_c = 0xff;
+    else {
+      if (raw_c == 0xff)
+	raw_ct = 7;
+      raw_c = *(raw_start + raw_len);
+      raw_len++;
+    }
+  }
+  raw_ct--;
+  d = (raw_c >> raw_ct) & 0x01;
+  return d;
+}