svnno****@sourc*****
svnno****@sourc*****
2009年 6月 5日 (金) 17:08:28 JST
ForkRevision: 143
http://svn.sourceforge.jp/view?root=swfed&view=rev&rev=143
Author: yoya
Date: 2009-06-05 17:08:28 +0900 (Fri, 05 Jun 2009)
Log Message:
-----------
bitstream_incrpos の bit_incr に負の値を指定できるように改造
Modified Paths:
--------------
trunk/src/bitstream.c
trunk/src/bitstream.h
-------------- next part --------------
Modified: trunk/src/bitstream.c
===================================================================
--- trunk/src/bitstream.c 2009-06-04 17:04:14 UTC (rev 142)
+++ trunk/src/bitstream.c 2009-06-05 08:08:28 UTC (rev 143)
@@ -318,9 +318,13 @@
int
bitstream_incrpos(bitstream_t *bs, signed long byte_incr,
- unsigned long bit_incr) {
+ signed long bit_incr) {
bs->byte_offset += byte_incr;
bs->bit_offset += bit_incr;
+ while (bs->bit_offset < 0) {
+ bs->bit_offset += 8;
+ bs->byte_offset --;
+ }
while (bs->bit_offset >= 8) {
bs->bit_offset -= 8;
bs->byte_offset ++;
Modified: trunk/src/bitstream.h
===================================================================
--- trunk/src/bitstream.h 2009-06-04 17:04:14 UTC (rev 142)
+++ trunk/src/bitstream.h 2009-06-05 08:08:28 UTC (rev 143)
@@ -50,7 +50,7 @@
/* seeking */
extern int bitstream_incrpos(bitstream_t *bs, signed long byte_incr,
- unsigned long bit_incr);
+ signed long bit_incr);
extern int bitstream_setpos(bitstream_t *bs, unsigned long byte_offset,
unsigned long bit_offset);
extern unsigned long bitstream_getbytepos(bitstream_t *bs);