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Allocating static buffers on the heap at runtime

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- The dram0 section size is very limited
- The static tables NNDeltaTab, BilinearTab, BicubicTab and Lanczos4Tab are taking too much space
This commit is contained in:
Joachim
2020-04-07 22:43:31 +02:00
parent e5bc91eaf7
commit 751f90bf1e
1 changed files with 51 additions and 8 deletions
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59
modules/imgproc/src/imgwarp.cpp
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@ -124,9 +124,48 @@ static bool IPPSet(const cv::Scalar &value, void *dataPointer, int step, IppiSiz
/************** interpolation formulas and tables ***************/
const int INTER_REMAP_COEF_BITS=15;
const int INTER_REMAP_COEF_SCALE=1 << INTER_REMAP_COEF_BITS;
#ifdef ESP32
/**
* Modifications for ESP32: These tables are taking too much space in dram0 segment which is limited
* in size. They are therefore initialized in heap at runtime
*/
static uchar *NNDeltaTab_i;
static float *BilinearTab_f;
static short *BilinearTab_i;
static float *BicubicTab_f;
static short *BicubicTab_i;
static float *Lanczos4Tab_f;
static short *Lanczos4Tab_i;
// Modif ESP32: allocate buffers on heap. FIXME: changed access from 2 or 3 dimensions to 1 dimension. Need to find usages of these tables to modify access
static bool tablesAllocated = false;
static void allocateTables()
{
NNDeltaTab_i = new uchar[INTER_TAB_SIZE2*2];
BilinearTab_f = new float[INTER_TAB_SIZE2*2*2];
BilinearTab_i = new short[INTER_TAB_SIZE2*2*2];
BicubicTab_f = new float[INTER_TAB_SIZE2*4*4];
BicubicTab_i = new short[INTER_TAB_SIZE2*4*4];
Lanczos4Tab_f = new float[INTER_TAB_SIZE2*8*8];
Lanczos4Tab_i = new short[INTER_TAB_SIZE2*8*8];
tablesAllocated = true;
}
#else
static uchar NNDeltaTab_i[INTER_TAB_SIZE2][2];
static float BilinearTab_f[INTER_TAB_SIZE2][2][2];
@ -142,6 +181,7 @@ static short BicubicTab_i[INTER_TAB_SIZE2][4][4];
static float Lanczos4Tab_f[INTER_TAB_SIZE2][8][8];
static short Lanczos4Tab_i[INTER_TAB_SIZE2][8][8];
#endif
static inline void interpolateLinear( float x, float* coeffs )
{
@ -209,19 +249,22 @@ static void initInterTab1D(int method, float* tab, int tabsz)
CV_Error( CV_StsBadArg, "Unknown interpolation method" );
}
static const void* initInterTab2D( int method, bool fixpt )
{
// Modif ESP32: allocate buffers on heap
if(!tablesAllocated)
allocateTables();
static bool inittab[INTER_MAX+1] = {false};
float* tab = 0;
short* itab = 0;
int ksize = 0;
if( method == INTER_LINEAR )
tab = BilinearTab_f[0][0], itab = BilinearTab_i[0][0], ksize=2;
tab = &BilinearTab_f[0], itab = &BilinearTab_i[0], ksize=2;
else if( method == INTER_CUBIC )
tab = BicubicTab_f[0][0], itab = BicubicTab_i[0][0], ksize=4;
tab = &BicubicTab_f[0], itab = &BicubicTab_i[0], ksize=4;
else if( method == INTER_LANCZOS4 )
tab = Lanczos4Tab_f[0][0], itab = Lanczos4Tab_i[0][0], ksize=8;
tab = &Lanczos4Tab_f[0], itab = &Lanczos4Tab_i[0], ksize=8;
else
CV_Error( CV_StsBadArg, "Unknown/unsupported interpolation type" );
@ -234,8 +277,8 @@ static const void* initInterTab2D( int method, bool fixpt )
for( j = 0; j < INTER_TAB_SIZE; j++, tab += ksize*ksize, itab += ksize*ksize )
{
int isum = 0;
NNDeltaTab_i[i*INTER_TAB_SIZE+j][0] = j < INTER_TAB_SIZE/2;
NNDeltaTab_i[i*INTER_TAB_SIZE+j][1] = i < INTER_TAB_SIZE/2;
NNDeltaTab_i[i*INTER_TAB_SIZE+j+0] = j < INTER_TAB_SIZE/2;
NNDeltaTab_i[i*INTER_TAB_SIZE+j+1] = i < INTER_TAB_SIZE/2;
for( k1 = 0; k1 < ksize; k1++ )
{
@ -1126,8 +1169,8 @@ public:
for( x1 = 0; x1 < bcols; x1++ )
{
int a = sA[x1] & (INTER_TAB_SIZE2-1);
XY[x1*2] = sXY[x1*2] + NNDeltaTab_i[a][0];
XY[x1*2+1] = sXY[x1*2+1] + NNDeltaTab_i[a][1];
XY[x1*2] = sXY[x1*2] + NNDeltaTab_i[a+0];
XY[x1*2+1] = sXY[x1*2+1] + NNDeltaTab_i[a+1];
}
}
}