diff options
Diffstat (limited to 'mpg123_artsplugin/mpg123/getbits.h')
-rw-r--r-- | mpg123_artsplugin/mpg123/getbits.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/mpg123_artsplugin/mpg123/getbits.h b/mpg123_artsplugin/mpg123/getbits.h new file mode 100644 index 00000000..65e3e745 --- /dev/null +++ b/mpg123_artsplugin/mpg123/getbits.h @@ -0,0 +1,33 @@ + +/* that's the same file as getits.c but with defines to + force inlining */ + +static unsigned long rval; +static unsigned char rval_uc; + +#define backbits(bitbuf,nob) ((void)( \ + (*(bitbuf)).bitindex -= (nob), \ + (*(bitbuf)).wordpointer += ((*(bitbuf)).bitindex>>3), \ + (*(bitbuf)).bitindex &= 0x7 )) + +#define getbitoffset(bitbuf) ((-(*(bitbuf)).bitindex)&0x7) +#define getbyte(bitbuf) (*(*(bitbuf)).wordpointer++) + +#define getbits(bitbuf,nob) ( \ + rval = (*(bitbuf)).wordpointer[0], rval <<= 8, rval |= (*(bitbuf)).wordpointer[1], \ + rval <<= 8, rval |= (*(bitbuf)).wordpointer[2], rval <<= (*(bitbuf)).bitindex, \ + rval &= 0xffffff, (*(bitbuf)).bitindex += (nob), \ + rval >>= (24-(nob)), (*(bitbuf)).wordpointer += ((*(bitbuf)).bitindex>>3), \ + (*(bitbuf)).bitindex &= 7,rval) + +#define getbits_fast(bitbuf,nob) ( \ + rval = (unsigned char) ((*(bitbuf)).wordpointer[0] << (*(bitbuf)).bitindex), \ + rval |= ((unsigned long) (*(bitbuf)).wordpointer[1]<<(*(bitbuf)).bitindex)>>8, \ + rval <<= (nob), rval >>= 8, \ + (*(bitbuf)).bitindex += (nob), (*(bitbuf)).wordpointer += ((*(bitbuf)).bitindex>>3), \ + (*(bitbuf)).bitindex &= 7, rval ) + +#define get1bit(bitbuf) ( \ + rval_uc = *(*(bitbuf)).wordpointer << (*(bitbuf)).bitindex, (*(bitbuf)).bitindex++, \ + (*(bitbuf)).wordpointer += ((*(bitbuf)).bitindex>>3), (*(bitbuf)).bitindex &= 7, rval_uc>>7 ) + |