Remove variables that are set but not used

This fixes build warnings with gcc.
pass each frame timestamp to codec
Don't try to use pow(int,int)

When building for android or older MSVC versions, this makes the build
fail, when it is ambiguous which pow() overload to use, when there
is no function matching pow(int, int).
Use the right data type for some local variables

pDecEngine->uiOffset is an uint64_t as well, and *pSliceNum
is uint32_t.

This fixes warnings about comparison between signed and unsigned
in gcc and msvc.
Add casts to avoid warnings about comparison between signed and unsigned

This fixes warnings with gcc and msvc.
Merge pull request #1486 from mstorsjo/fix-pow-params

Don't try to use pow(int,int)
Merge pull request #1488 from mstorsjo/fix-warnings

Fix warnings with gcc and MSVC
fixing OverallMbMap for slice_idx>255 and some log improvements
Merge pull request #1485 from ruil2/cabac_refine

pass each frame timestamp to codec
use %lld instead of %8d for longlong type
update timestamp unit as millisecond
enable cross IDR EC method
Merge pull request #1493 from ruil2/printf

use %lld instead of %8d for longlong type
add a simple UT for debugging decoder crash
Merge pull request #1490 from sijchen/after_review

[Encoder] Fixing for large number of slices
Merge pull request #1494 from huili2/ec_final_crash_UT

add a simple UT for debugging decoder crash
fix cabac bug in deltaqp
Merge pull request #1497 from dongzha/FixCabacBug

fix cabac bug in deltaqp
decoder statictis adding

mem

mem

decstatictis

time change

time change

set decTime=0
Merge pull request #1500 from syureyi/decoderstatics

decoder statictis adding