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#include "cuCache.h"
#include "cumath.h"
namespace TNet {
CuCache::
CuCache()
: mState(EMPTY), mIntakePos(0), mExhaustPos(0), mDiscarded(0),
mRandomized(false), mTrace(0)
{ }
CuCache::
~CuCache()
{ }
void
CuCache::
Init(size_t cachesize, size_t bunchsize)
{
if((cachesize % bunchsize) != 0) {
Error("Non divisible cachesize by bunchsize");
}
mCachesize = cachesize;
mBunchsize = bunchsize;
mState = EMPTY;
mIntakePos = 0;
mExhaustPos = 0;
mRandomized = false;
}
void
CuCache::
AddData(const CuMatrix<BaseFloat>& rFeatures, const CuMatrix<BaseFloat>& rDesired)
{
assert(rFeatures.Rows() == rDesired.Rows());
//lazy buffers allocation
if(mFeatures.Rows() != mCachesize) {
mFeatures.Init(mCachesize,rFeatures.Cols());
mDesired.Init(mCachesize,rDesired.Cols());
}
//warn if segment longer than half-cache
if(rFeatures.Rows() > mCachesize/2) {
std::ostringstream os;
os << "Too long segment and small feature cache! "
<< " cachesize: " << mCachesize
<< " segmentsize: " << rFeatures.Rows();
Warning(os.str());
}
//change state
if(mState == EMPTY) {
if(mTrace&3) std::cout << "/" << std::flush;
mState = INTAKE; mIntakePos = 0;
//check for leftover from previous segment
int leftover = mFeaturesLeftover.Rows();
//check if leftover is not bigger than cachesize
if(leftover > mCachesize) {
std::ostringstream os;
os << "Too small feature cache: " << mCachesize
<< ", truncating: "
<< leftover - mCachesize << " frames from previous segment leftover";
//Error(os.str());
Warning(os.str());
leftover = mCachesize;
}
//prefill cache with leftover
if(leftover > 0) {
mFeatures.CopyRows(leftover,0,mFeaturesLeftover,0);
mDesired.CopyRows(leftover,0,mDesiredLeftover,0);
mFeaturesLeftover.Destroy();
mDesiredLeftover.Destroy();
mIntakePos += leftover;
}
}
assert(mState == INTAKE);
assert(rFeatures.Rows() == rDesired.Rows());
if(mTrace&2) std::cout << "F" << std::flush;
int cache_space = mCachesize - mIntakePos;
int feature_length = rFeatures.Rows();
int fill_rows = (cache_space<feature_length)? cache_space : feature_length;
int leftover = feature_length - fill_rows;
assert(cache_space > 0);
//copy the data to cache
mFeatures.CopyRows(fill_rows,0,rFeatures,mIntakePos);
mDesired.CopyRows(fill_rows,0,rDesired,mIntakePos);
//copy leftovers
if(leftover > 0) {
mFeaturesLeftover.Init(leftover,mFeatures.Cols());
mDesiredLeftover.Init(leftover,mDesired.Cols());
mFeaturesLeftover.CopyRows(leftover,fill_rows,rFeatures,0);
mDesiredLeftover.CopyRows(leftover,fill_rows,rDesired,0);
}
//update cursor
mIntakePos += fill_rows;
//change state
if(mIntakePos == mCachesize) {
if(mTrace&3) std::cout << "\\" << std::flush;
mState = FULL;
}
}
void
CuCache::
Randomize()
{
assert(mState == FULL || mState == INTAKE);
if(mTrace&3) std::cout << "R" << std::flush;
//lazy initialization of hte output buffers
mFeaturesRandom.Init(mCachesize,mFeatures.Cols());
mDesiredRandom.Init(mCachesize,mDesired.Cols());
//generate random series of integers
Vector<int> randmask(mIntakePos);
for(unsigned int i=0; i<mIntakePos; i++) {
randmask[i]=i;
}
int* ptr = randmask.pData();
std::random_shuffle(ptr, ptr+mIntakePos, GenerateRandom);
CuVector<int> cu_randmask;
cu_randmask.CopyFrom(randmask);
//randomize
CuMath<BaseFloat>::Randomize(mFeaturesRandom,mFeatures,cu_randmask);
CuMath<BaseFloat>::Randomize(mDesiredRandom,mDesired,cu_randmask);
mRandomized = true;
}
void
CuCache::
GetBunch(CuMatrix<BaseFloat>& rFeatures, CuMatrix<BaseFloat>& rDesired)
{
if(mState == EMPTY) {
Error("GetBunch on empty cache!!!");
}
//change state if full...
if(mState == FULL) {
if(mTrace&3) std::cout << "\\" << std::flush;
mState = EXHAUST; mExhaustPos = 0;
}
//final cache is not completely filled
if(mState == INTAKE) //&& mpFeatures->EndOfList()
{
if(mTrace&3) std::cout << "\\-LAST\n" << std::flush;
mState = EXHAUST; mExhaustPos = 0;
}
assert(mState == EXHAUST);
//init the output
rFeatures.Init(mBunchsize,mFeatures.Cols());
rDesired.Init(mBunchsize,mDesired.Cols());
//copy the output
if(mRandomized) {
rFeatures.CopyRows(mBunchsize,mExhaustPos,mFeaturesRandom,0);
rDesired.CopyRows(mBunchsize,mExhaustPos,mDesiredRandom,0);
} else {
rFeatures.CopyRows(mBunchsize,mExhaustPos,mFeatures,0);
rDesired.CopyRows(mBunchsize,mExhaustPos,mDesired,0);
}
//update cursor
mExhaustPos += mBunchsize;
//change state to EMPTY
if(mExhaustPos > mIntakePos-mBunchsize) {
//we don't have more complete bunches...
mDiscarded += mIntakePos - mExhaustPos;
mState = EMPTY;
}
}
}
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