eden-emu/opus
15
0
Fork 0
mirror of https://github.com/xiph/opus.git synced 2025-06-01 08:07:41 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Implements OPUS_{GET,SET}_LSB_DEPTH

Browse source 
This is used to avoid dynalloc doing silly things on periodic LSB
patterns and to reduce the bitrate on near-silence.
This commit is contained in:
Jean-Marc Valin 2012-07-11 02:54:47 -04:00
parent c5880fe48b
commit cf1053dc85
7 changed files with 114 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

48
celt/mathops.h
View file

@ -43,6 +43,33 @@
unsigned isqrt32(opus_uint32 _val);
#ifndef OVERRIDE_CELT_MAXABS16
static inline opus_val16 celt_maxabs16(const opus_val16 *x, int len)
{
int i;
opus_val16 maxval = 0;
for (i=0;i<len;i++)
maxval = MAX16(maxval, ABS16(x[i]));
return maxval;
}
#endif
#ifndef OVERRIDE_CELT_MAXABS32
#ifdef FIXED_POINT
static inline opus_val32 celt_maxabs32(const opus_val32 *x, int len)
{
int i;
opus_val32 maxval = 0;
for (i=0;i<len;i++)
maxval = MAX32(maxval, ABS32(x[i]));
return maxval;
}
#else
#define celt_maxabs32(x,len) celt_maxabs16(x,len)
#endif
#endif
#ifndef FIXED_POINT
#define PI 3.141592653f
@ -117,27 +144,6 @@ static inline opus_int16 celt_ilog2(opus_int32 x)
}
#endif
#ifndef OVERRIDE_CELT_MAXABS16
static inline opus_val16 celt_maxabs16(opus_val16 *x, int len)
{
int i;
opus_val16 maxval = 0;
for (i=0;i<len;i++)
maxval = MAX16(maxval, ABS16(x[i]));
return maxval;
}
#endif
#ifndef OVERRIDE_CELT_MAXABS32
static inline opus_val32 celt_maxabs32(opus_val32 *x, int len)
{
int i;
opus_val32 maxval = 0;
for (i=0;i<len;i++)
maxval = MAX32(maxval, ABS32(x[i]));
return maxval;
}
#endif
/** Integer log in base2. Defined for zero, but not for negative numbers */
static inline opus_int16 celt_zlog2(opus_val32 x)