Modifications to increase modularity of jp2 coding/decoding

codec/image_to_j2k.c

@@ -318,7 +318,8 @@ int main(int argc, char **argv)
   int ir = 0;
   int res_spec = 0;		/*   For various precinct sizes specification                 */
   char sep;
-  char *outbuf;
+  char *j2k_codestream;
+  char *jp2_codestream;
   FILE *f;
 
 
@@ -848,10 +849,11 @@ int main(int argc, char **argv)
 	return 1;
       }
     } else {
-      outbuf = (char *) malloc(cp.tdx * cp.tdy * cp.tw * cp.th * 2);	/* Allocate memory for all tiles */
+      j2k_codestream = (char *) malloc(cp.tdx * cp.tdy * cp.tw * cp.th * 2);
-      cio_init(outbuf, cp.tdx * cp.tdy * cp.tw * cp.th * 2);
+      /* Allocate memory for all tiles */
+      cio_init(j2k_codestream, cp.tdx * cp.tdy * cp.tw * cp.th * 2);
       len =
-	j2k_encode(&img, &cp, outbuf,
+	j2k_encode(&img, &cp, j2k_codestream,
 		   cp.tdx * cp.tdy * cp.tw * cp.th * 2, index);
       if (len == 0) {
 	fprintf(stderr, "failed to encode image\n");
@@ -862,8 +864,8 @@ int main(int argc, char **argv)
 	fprintf(stderr, "failed to open %s for writing\n", outfile);
 	return 1;
       }
-      fwrite(outbuf, 1, len, f);
+      fwrite(j2k_codestream, 1, len, f);
-      free(outbuf);
+      free(j2k_codestream);
       fclose(f);
     }
   } else {			/* JP2 format output */
@@ -873,30 +875,40 @@ int main(int argc, char **argv)
     jp2_struct->image = &img;
 
     /* Initialising the standard JP2 box content */
-    /* If you wish to modify those boxes, you have to modify the jp2_struct content */
+    /* If you wish to modify those boxes, you have to modify 
+    the jp2_struct content */
     if (jp2_init_stdjp2(jp2_struct, &img)) {
       fprintf(stderr, "Error with jp2 initialization");
       return 1;
     };
 
     if (cp.intermed_file == 1) {
-      /*For the moment, JP2 format does not use intermediary files for each tile */
+      /*For the moment, JP2 format does not use intermediary 
+      files for each tile */
       cp.intermed_file = 0;
     }
-    outbuf = (char *) malloc(cp.tdx * cp.tdy * cp.tw * cp.th * 2);
+    j2k_codestream = (char *) malloc(cp.tdx * cp.tdy * cp.tw * cp.th * 2);
-    cio_init(outbuf, cp.tdx * cp.tdy * cp.tw * cp.th * 2);
+    jp2_codestream = (char *) malloc(cp.tdx * cp.tdy * cp.tw * cp.th * 2);
-    len = jp2_encode(jp2_struct, &cp, outbuf, index);
+
+    cio_init(j2k_codestream, cp.tdx * cp.tdy * cp.tw * cp.th * 2);
+    len = j2k_encode(&img, &cp, j2k_codestream,
+      cp.tdx * cp.tdy * cp.tw * cp.th * 2, index);
     if (len == 0) {
       fprintf(stderr, "failed to encode image\n");
       return 1;
     }
+    jp2_struct->j2k_codestream_len = len;
+
+    cio_init(jp2_codestream, cp.tdx * cp.tdy * cp.tw * cp.th * 2);
+    len = jp2_wrap_j2k(jp2_struct, j2k_codestream, jp2_codestream);
     f = fopen(outfile, "wb");
     if (!f) {
       fprintf(stderr, "failed to open %s for writing\n", outfile);
       return 1;
     }
-    fwrite(outbuf, 1, len, f);
+    fwrite(jp2_codestream, 1, len, f);
-    free(outbuf);
+    free(jp2_codestream);
+    free(j2k_codestream);
     fclose(f);
   }
 

codec/j2k_to_image.c

@@ -25,12 +25,20 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+
+
 //MEMORY LEAK
+
 #ifdef _DEBUG
+
 #define _CRTDBG_MAP_ALLOC
+
 #include <stdlib.h>  // Must be included first
+
 #include <crtdbg.h>
+
 #endif
+
 //MEM
 
 
@@ -147,6 +155,7 @@ int main(int argc, char **argv)
   src_name--;
   S1 = *src_name;
 
+
   /* J2K format */
   if ((S1 == 'j' && S2 == '2' && S3 == 'k')
       || (S1 == 'J' && S2 == '2' && S3 == 'K') || (S1 == 'j' && S2 == '2'
@@ -165,7 +174,12 @@ int main(int argc, char **argv)
 
     jp2_struct->image = &img;
 
-    if (jp2_decode(src, len, jp2_struct, &cp)) {
+    if (jp2_read_struct(src, jp2_struct, len)) {
+      fprintf(stderr, "j2k_to_image: failed to decode jp2 structure!\n");
+      return 1;
+    }
+
+    if (!j2k_decode(src + jp2_struct->j2k_codestream_offset, jp2_struct->j2k_codestream_len, &img, &cp)) {
       fprintf(stderr, "j2k_to_image: failed to decode image!\n");
       return 1;
     }
@@ -561,12 +575,20 @@ int main(int argc, char **argv)
     break;
   }
 
+
+
   j2k_dec_release();
 
+
+
   //MEMORY LEAK
+
   #ifdef _DEBUG
+
     _CrtDumpMemoryLeaks();
+
   #endif
+
   //MEM
 
   return 0;

libopenjpeg/jp2.c

@@ -65,6 +65,11 @@ int jp2_read_boxhdr(jp2_box_t * box)
       return 1;
     };
     box->length = cio_read(4);
+    if (box->length == 0) 
+      box->length = cio_numbytesleft() + 12;
+  }
+  else if (box->length == 0) {
+    box->length = cio_numbytesleft() + 8;
   }
   return 0;
 }
@@ -424,28 +429,27 @@ int jp2_read_ftyp(jp2_struct_t * jp2_struct)
   return 0;
 }
 
-int jp2_write_jp2c(j2k_image_t * img, j2k_cp_t * cp, char *jp2_buffer,
+int jp2_write_jp2c(jp2_struct_t * jp2_struct, char *j2k_codestream)
-		   char *index)
 {
-  int len;
   jp2_box_t box;
 
   box.init_pos = cio_tell();
   cio_skip(4);
   cio_write(JP2_JP2C, 4);	// JP2C
 
-  len = j2k_encode(img, cp, jp2_buffer, cp->tdx * cp->tdy * cp->th * cp->tw * 2, index);
+  jp2_struct->j2k_codestream_offset = cio_tell();
+  memcpy(cio_getbp(),j2k_codestream, jp2_struct->j2k_codestream_len);
 
-  box.length = cio_tell() - box.init_pos;
+  box.length = 8 + jp2_struct->j2k_codestream_len;
   cio_seek(box.init_pos);
   cio_write(box.length, 4);	/*    L       */
   cio_seek(box.init_pos + box.length);
+
   return box.length;
 }
 
 
-int jp2_read_jp2c(unsigned char *src, int len, jp2_struct_t * jp2_struct,
+int jp2_read_jp2c(unsigned char *src, jp2_struct_t * jp2_struct)
-		  j2k_cp_t * cp)
 {
   jp2_box_t box;
 
@@ -455,12 +459,8 @@ int jp2_read_jp2c(unsigned char *src, int len, jp2_struct_t * jp2_struct,
     return 1;
   }
 
-  src += cio_tell();
+  jp2_struct->j2k_codestream_offset = cio_tell();
-
+  jp2_struct->j2k_codestream_len = box.length - 8;
-  if (j2k_decode(src, len, jp2_struct->image, cp) == 0) {
-    fprintf(stderr, "JP2F box: failed to decode J2K bitstream image!\n");
-    return 1;
-  }
 
   return 0;
 }
@@ -508,8 +508,8 @@ int jp2_read_jp()
 
 }
 
-int jp2_decode(unsigned char *src, int len, jp2_struct_t * jp2_struct,
+
-	       j2k_cp_t * cp)
+int jp2_read_struct(unsigned char *src, jp2_struct_t * jp2_struct, int len)
 {
   cio_init(src, len);
 
@@ -519,20 +519,17 @@ int jp2_decode(unsigned char *src, int len, jp2_struct_t * jp2_struct,
     return 1;
   if (jp2_read_jp2h(jp2_struct))
     return 1;
-  if (jp2_read_jp2c(src, len, jp2_struct, cp))
+  if (jp2_read_jp2c(src, jp2_struct))
     return 1;
   return 0;
 }
 
-int jp2_encode(jp2_struct_t * jp2_struct, j2k_cp_t * cp, char *output,
+int jp2_wrap_j2k(jp2_struct_t * jp2_struct, char *j2k_codestream, char *output)
-	       char *index)
 {
-  int len;
-
   jp2_write_jp();
   jp2_write_ftyp(jp2_struct);
   jp2_write_jp2h(jp2_struct);
-  len = jp2_write_jp2c(jp2_struct->image, cp, output, index);
+  jp2_write_jp2c(jp2_struct, j2k_codestream);
 
   return cio_tell();
 }

libopenjpeg/jp2.h

@@ -53,6 +53,8 @@ typedef struct {
   unsigned int *cl;
   jp2_comps_t *comps;
   j2k_image_t *image;
+  unsigned int j2k_codestream_offset;
+  unsigned int j2k_codestream_len;
 } jp2_struct_t;
 
 typedef struct {
@@ -69,17 +71,13 @@ typedef struct {
  */
 int jp2_init_stdjp2(jp2_struct_t * jp2_struct, j2k_image_t * img);
 
-/* int jp2_write_jp2c(j2k_image_t * img, j2k_cp_t * cp, char *jp2_buffer,
+/* int jp2_write_jp2c(char *j2k_codestream, int j2k_len);
- *		   char *index);
  *
  * Write the jp2c codestream box 
- * img: the j2k_image that will be compressed
+ * jp2_struct: the jp2 structure you are working with
- * jp2_buffer: the buffer that will recieve the compressed data
+ * j2k_codestream: the j2k codestream to include in jp2 file
- * index: the name of the index file 
  */
-int jp2_write_jp2c(j2k_image_t * img, j2k_cp_t * cp, char *jp2_buffer,
+int jp2_write_jp2c(jp2_struct_t * jp2_struct, char *j2k_codestream);
-		   char *index);
-
 
 /* int jp2_write_jp2h(jp2_struct_t * jp2_struct);
  *
@@ -95,28 +93,25 @@ void jp2_write_jp2h(jp2_struct_t * jp2_struct);
  */
 int jp2_read_jp2h(jp2_struct_t * jp2_struct);
 
-/* int jp2_encode(jp2_struct_t * jp2_struct, j2k_cp_t * cp, char *output,
+/* int jp2_wrap_j2k(jp2_struct_t * jp2_struct, char *j2k_codestream, 
- *       char *index);
+	  int j2k_len, char *output)
  *
- * Encode a JP2 file
+ * Wrap a J2K codestream in a JP2 file
- * jp2_buffer: the buffer containing the pointer to the image to encode
+ * jp2_struct: the jp2 structure used to create jp2 boxes
- * cp: coding parameters of the image
+ * j2k_codestream: the j2k codestream to include in jp2 file
- * outbuf: pointer to memory where compressed data will be written
+ * output: pointer to jp2 codestream that will be created
- * index: the name of the index file 
  */
-int jp2_encode(jp2_struct_t * jp2_struct, j2k_cp_t * cp, char *output,
+int jp2_wrap_j2k(jp2_struct_t * jp2_struct, char *j2k_codestream, 
-	       char *index);
+		  char *output);
 
-/* int jp2_decode(unsigned char *src, int len, jp2_struct_t * jp2_struct,
+
- *	       j2k_cp_t * cp);
+/* int jp2_read_struct(unsigned char *src, jp2_struct_t * jp2_struct);
  *
- * Decode a JP2 file
+ * Decode the structure of a JP2 file
  * src: pointer to memory where compressed data is stored
- * len: length of src buffer
  * jp2_struct: the jp2 structure that will be created 
- * cp: coding parameters of the image
+ * len: length of jp2 codestream
  */
-int jp2_decode(unsigned char *src, int len, jp2_struct_t * jp2_struct,
+int jp2_read_struct(unsigned char *src, jp2_struct_t * jp2_struct, int len);
-	       j2k_cp_t * cp);
 
 #endif