From e2de64d6f1beb9e492daf5b886e19933c1fa41dd Mon Sep 17 00:00:00 2001
From: toma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>
Date: Wed, 25 Nov 2009 17:56:58 +0000
Subject: Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
 BUG:215923

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
---
 mpg123_artsplugin/mpg123/getbits.c | 116 +++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 mpg123_artsplugin/mpg123/getbits.c

(limited to 'mpg123_artsplugin/mpg123/getbits.c')

diff --git a/mpg123_artsplugin/mpg123/getbits.c b/mpg123_artsplugin/mpg123/getbits.c
new file mode 100644
index 00000000..3ed993cb
--- /dev/null
+++ b/mpg123_artsplugin/mpg123/getbits.c
@@ -0,0 +1,116 @@
+#include "mpg123.h"
+#include "common.h"
+
+void backbits(struct bitstream_info *bitbuf,int number_of_bits)
+{
+  bitbuf->bitindex    -= number_of_bits;
+  bitbuf->wordpointer += (bitbuf->bitindex>>3);
+  bitbuf->bitindex    &= 0x7;
+}
+
+int getbitoffset(struct bitstream_info *bitbuf) 
+{
+  return (-bitbuf->bitindex)&0x7;
+}
+
+int getbyte(struct bitstream_info *bitbuf)
+{
+#ifdef DEBUG_GETBITS
+  if(bitbuf->bitindex) 
+    fprintf(stderr,"getbyte called unsynched!\n");
+#endif
+  return *bitbuf->wordpointer++;
+}
+
+unsigned int getbits(struct bitstream_info *bitbuf,int number_of_bits)
+{
+  unsigned long rval;
+
+#ifdef DEBUG_GETBITS
+fprintf(stderr,"g%d",number_of_bits);
+#endif
+
+  if(!number_of_bits)
+    return 0;
+
+#if 0
+   check_buffer_range(number_of_bits+bitbuf->bitindex);
+#endif
+
+  {
+    rval = bitbuf->wordpointer[0];
+    rval <<= 8;
+    rval |= bitbuf->wordpointer[1];
+    rval <<= 8;
+    rval |= bitbuf->wordpointer[2];
+
+    rval <<= bitbuf->bitindex;
+    rval &= 0xffffff;
+
+    bitbuf->bitindex += number_of_bits;
+
+    rval >>= (24-number_of_bits);
+
+    bitbuf->wordpointer += (bitbuf->bitindex>>3);
+    bitbuf->bitindex &= 7;
+  }
+
+#ifdef DEBUG_GETBITS
+fprintf(stderr,":%x ",rval);
+#endif
+
+  return rval;
+}
+
+unsigned int getbits_fast(struct bitstream_info *bitbuf,int number_of_bits)
+{
+  unsigned int rval;
+#ifdef DEBUG_GETBITS
+fprintf(stderr,"g%d",number_of_bits);
+#endif
+
+#if 0
+   check_buffer_range(number_of_bits+bitbuf->bitindex);
+#endif
+
+  rval =  (unsigned char) (bitbuf->wordpointer[0] << bitbuf->bitindex);
+  rval |= ((unsigned int) bitbuf->wordpointer[1]<<bitbuf->bitindex)>>8;
+  rval <<= number_of_bits;
+  rval >>= 8;
+
+  bitbuf->bitindex += number_of_bits;
+
+  bitbuf->wordpointer += (bitbuf->bitindex>>3);
+  bitbuf->bitindex &= 7;
+
+#ifdef DEBUG_GETBITS
+fprintf(stderr,":%x ",rval);
+#endif
+  return rval;
+}
+
+unsigned int get1bit(struct bitstream_info *bitbuf)
+{
+  unsigned char rval;
+
+#ifdef DEBUG_GETBITS
+fprintf(stderr,"g%d",1);
+#endif
+
+#if 0
+   check_buffer_range(1+bitbuf->bitindex);
+#endif
+
+  rval = *(bitbuf->wordpointer) << bitbuf->bitindex;
+
+  bitbuf->bitindex++;
+  bitbuf->wordpointer += (bitbuf->bitindex>>3);
+  bitbuf->bitindex &= 7;
+
+#ifdef DEBUG_GETBITS
+fprintf(stderr,":%d ",rval>>7);
+#endif
+
+  return rval>>7;
+}
+
-- 
cgit v1.2.1