Initial revision

1 files changed, 163 insertions, 0 deletions

diff --git a/jpwl/decoder/libopenjpeg/jpt.c b/jpwl/decoder/libopenjpeg/jpt.c
new file mode 100644
index 00000000..de0c8746
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+++ b/jpwl/decoder/libopenjpeg/jpt.c
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+/*
+ * Copyright (c) 2004, Yannick Verschueren
+ * Copyright (c) 2004, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
+ * 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 <stdio.h>
+#include <stdlib.h>
+
+#include "jpt.h"
+#include "j2k.h"
+#include "cio.h"
+
+
+/*
+ * Read the information contains in VBAS [JPP/JPT stream message header]
+ * Store information (7 bits) in value
+ *
+ */
+unsigned int jpt_read_VBAS_info(unsigned int value)
+{
+  unsigned char elmt;
+
+  elmt = cio_read(1);
+  while ((elmt >> 7) == 1) {
+    value = (value << 7);
+    value |= (elmt & 0x7f);
+    elmt = cio_read(1);
+  }
+  value = (value << 7);
+  value |= (elmt & 0x7f);
+
+  return value;
+}
+
+/*
+ * Initialize the value of the message header structure 
+ *
+ */
+void jpt_init_Msg_Header(jpt_msg_header_struct_t * header)
+{
+  header->Id = 0;		/* In-class Identifier    */
+  header->last_byte = 0;	/* Last byte information  */
+  header->Class_Id = 0;		/* Class Identifier       */
+  header->CSn_Id = 0;		/* CSn : index identifier */
+  header->Msg_offset = 0;	/* Message offset         */
+  header->Msg_length = 0;	/* Message length         */
+  header->Layer_nb = 0;		/* Auxiliary for JPP case */
+}
+
+/*
+ * Re-initialize the value of the message header structure
+ *
+ * Only parameters always present in message header
+ *
+ */
+void jpt_reinit_Msg_Header(jpt_msg_header_struct_t * header)
+{
+  header->Id = 0;		/* In-class Identifier    */
+  header->last_byte = 0;	/* Last byte information  */
+  header->Msg_offset = 0;	/* Message offset         */
+  header->Msg_length = 0;	/* Message length         */
+}
+
+/*
+ * Read the message header for a JPP/JPT - stream
+ *
+ */
+void jpt_read_Msg_Header(jpt_msg_header_struct_t * header)
+{
+  unsigned char elmt, Class = 0, CSn = 0;
+  jpt_reinit_Msg_Header(header);
+
+  /* ------------- */
+  /* VBAS : Bin-ID */
+  /* ------------- */
+  elmt = cio_read(1);
+
+  /* See for Class and CSn */
+  switch ((elmt >> 5) & 0x03) {
+  case 0:
+    fprintf(stderr, "Forbidden value encounter in message header !!\n");
+    break;
+  case 1:
+    Class = 0;
+    CSn = 0;
+    break;
+  case 2:
+    Class = 1;
+    CSn = 0;
+    break;
+  case 3:
+    Class = 1;
+    CSn = 1;
+    break;
+  default:
+    break;
+  }
+
+  /* see information on bits 'c' [p 10 : A.2.1 general, ISO/IEC FCD 15444-9] */
+  if (((elmt >> 3) & 0x01) == 1)
+    header->last_byte = 1;
+
+  /* In-class identifier */
+  header->Id |= (elmt & 0x0f);
+  if ((elmt >> 7) == 1)
+    header->Id = jpt_read_VBAS_info(header->Id);
+
+  /* ------------ */
+  /* VBAS : Class */
+  /* ------------ */
+  if (Class == 1) {
+    header->Class_Id = 0;
+    header->Class_Id = jpt_read_VBAS_info(header->Class_Id);
+  }
+
+  /* ---------- */
+  /* VBAS : CSn */
+  /* ---------- */
+  if (CSn == 1) {
+    header->CSn_Id = 0;
+    header->CSn_Id = jpt_read_VBAS_info(header->CSn_Id);
+  }
+
+  /* ----------------- */
+  /* VBAS : Msg_offset */
+  /* ----------------- */
+  header->Msg_offset = jpt_read_VBAS_info(header->Msg_offset);
+
+  /* ----------------- */
+  /* VBAS : Msg_length */
+  /* ----------------- */
+  header->Msg_length = jpt_read_VBAS_info(header->Msg_length);
+
+  /* ---------- */
+  /* VBAS : Aux */
+  /* ---------- */
+  if (header->CSn_Id == 1) {
+    header->Layer_nb = 0;
+    header->Layer_nb = jpt_read_VBAS_info(header->Layer_nb);
+  }
+}