Macros
qsort.h File Reference
#include "common.h"
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Macros

#define AV_QSORT(p, num, type, cmp)
 Quicksort This sort is fast, and fully inplace but not stable and it is possible to construct input that requires O(n^2) time but this is very unlikely to happen with non constructed input. More...
 
#define AV_MSORT(p, tmp, num, type, cmp)
 Merge sort, this sort requires a temporary buffer and is stable, its worst case time is O(n log n) More...
 

Macro Definition Documentation

#define AV_MSORT (   p,
  tmp,
  num,
  type,
  cmp 
)
Value:
{\
unsigned i, j, step;\
for(step=1; step<(num); step+=step){\
for(i=0; i<(num); i+=2*step){\
unsigned a[2] = {i, i+step};\
unsigned end = FFMIN(i+2*step, (num));\
for(j=i; a[0]<i+step && a[1]<end; j++){\
int idx= cmp(p+a[0], p+a[1]) > 0;\
tmp[j] = p[ a[idx]++ ];\
}\
if(a[0]>=i+step) a[0] = a[1];\
for(; j<end; j++){\
tmp[j] = p[ a[0]++ ];\
}\
}\
FFSWAP(type*, p, tmp);\
}\
}
if
initialize output if(nPeaks >3)%at least 3 peaks in spectrum for trying to find f0 nf0peaks
end
end end
Definition: extra/f0detection.m:15
FFMIN
#define FFMIN(a, b)
Definition: common.h:58
cmp
static av_always_inline int cmp(MpegEncContext *s, const int x, const int y, const int subx, const int suby, const int size, const int h, int ref_index, int src_index, me_cmp_func cmp_func, me_cmp_func chroma_cmp_func, const int flags)
compares a block (either a full macroblock or a partition thereof) against a proposed motion-compensa...
Definition: motion_est.c:251
i
synthesis window for stochastic i
Definition: code Kat/hpsmodel.m:34
type
#define type
FFSWAP
#define FFSWAP(type, a, b)
Definition: common.h:61
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:467
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:12
a
a
Definition: h264pred_template.c:466

Merge sort, this sort requires a temporary buffer and is stable, its worst case time is O(n log n)

Parameters
pmust be a lvalue pointer, this function may exchange it with tmp
tmpmust be a lvalue pointer, this function may exchange it with p

Definition at line 100 of file qsort.h.

#define AV_QSORT (   p,
  num,
  type,
  cmp 
)

Quicksort This sort is fast, and fully inplace but not stable and it is possible to construct input that requires O(n^2) time but this is very unlikely to happen with non constructed input.

Definition at line 30 of file qsort.h.

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