Hi Michael,
On Sun, May 15, 2011 at 5:00 PM, Michael Niedermayer <michaelni at gmx.at>wrote:
>
> We will have to implement multiple codeword segments.
>
> Also sofar, good work!
>
>
Sorry for the late reply. If I implement codeblock segment, its going to
affect from packet decoding process to the subsequent deoding process till
the last. Therefore, I have to be properly planned in order to accomplish
these changes. Here, I have put patch for incorporating multiple codeblock
segment. I had to create two more structures and modify J2KCblk sturucture
as well. This patch is just for the modification/creation on the structures.
I am also writing some miscellaneous function and I will post those in my
subsequent emails.
@@ -137,16 +137,62 @@
int64_t disto;
} J2kPass;
+
+
typedef struct {
+ /* The next segment in the list. */
+ struct J2KCblkSeg *next;
+
+ /* The previous segment in the list. */
+ struct J2KCblkSeg *prev;
+
+ /* The starting pass number for this segment. */
+ uint8_t passno;
+
+ /* The number of passes in this segment. */
+ uint8_t numpasses;
+
+ /* The maximum number of passes in this segment. */
+ uint8_t maxpasses;
+
+ /* Data for this segment. */
+ uint8_t data[8192];
+
+ /* The number of bytes destined for this segment from the packet
+ currently being decoded. */
+ uint8_t cnt;
+
+ /* A flag indicating if this segment has been terminated. */
+ uint8_t complete;
+
+ /* The layer number to which this segment belongs. */
+ /* If the segment spans multiple layers, then the largest layer number
+ spanned by the segment is used. */
+ uint8_t lyrno;
+} J2KCblkSeg;
+
+typedef struct {
+ /* The first entry in the list. */
+ J2KCblkSeg *head;
+
+ /* The last entry in the list. */
+ J2KCblkSeg *tail;
+} J2KCblkSegList;
+
+typedef struct {
+ /* A list of segments that still need to be decoded. */
+ J2KCblkSegList segs;
+
+ /* The first incomplete/partial segment. */
+ J2KCblkSeg *curseg;
+
+ /* The first pass number containing data for this code block. */
+ uint8_t firstpassno;
uint8_t npasses;
- uint8_t ninclpasses; ///< number coding of passes included in
codestream
uint8_t nonzerobits;
uint16_t length;
uint16_t lengthinc;
uint8_t lblock;
- uint8_t zero;
- uint8_t data[8192];
- J2kPass passes[100];
} J2kCblk; ///< code block
typedef struct {
Thanks
--
Rukhsana Ruby
Phd Student
Department of Electrical & Computer Engineering
The University of British Columbia
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