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Diffstat (limited to 'general_filter/generalFilter.cpp')
| -rw-r--r-- | general_filter/generalFilter.cpp | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/general_filter/generalFilter.cpp b/general_filter/generalFilter.cpp new file mode 100644 index 0000000..2ce18b7 --- /dev/null +++ b/general_filter/generalFilter.cpp @@ -0,0 +1,130 @@ +//////////////////////////////////////////////////////////////////////////////// +// _____ _ _ _____ _ _ +// |_ _| (_) | | / ____| | | | +// | | _ __ ___ _ __ ___ _ __ _ __ _| | | | ___ | | | ___ __ _ ___ +// | | | '_ ` _ \| '_ \ / _ \ '__| |/ _` | | | | / _ \| | |/ _ \/ _` |/ _ \ +// _| |_| | | | | | |_) | __/ | | | (_| | | | |___| (_) | | | __/ (_| | __/ +// |_____|_| |_| |_| .__/ \___|_| |_|\__,_|_| \_____\___/|_|_|\___|\__, |\___| +// | | __/ | +// |_| |___/ +// _ _ +// | | | | +// | | ___ _ __ __| | ___ _ __ +// | | / _ \| '_ \ / _` |/ _ \| '_ \ +// | |___| (_) | | | | (_| | (_) | | | | +// |______\___/|_| |_|\__,_|\___/|_| |_| +// +//////////////////////////////////////////////////////////////////////////////// +// File: sobel.cpp +// Description: video to vga sobel filter - real-time processing +// By: rad09 +//////////////////////////////////////////////////////////////////////////////// +// this hardware block receives the VGA stream and then produces a blured output +// based on the FIR design - page 230 of HLS Blue Book +//////////////////////////////////////////////////////////////////////////////// +// Catapult Project options +// Constraint Editor: +// Frequency: 50 MHz +// Top design: sobel +// clk>reset sync: disable; reset async: enable; enable: enable +// Architecture Constraints: +// interface>vin: wordlength = 90, streaming = 90 +// interface>vout: wordlength = 30, streaming = 30 +// core>main: pipeline + distributed + merged +// core>main>frame: merged +// core>main>frame>shift, mac1, mac2: unroll + merged +//////////////////////////////////////////////////////////////////////////////// + + +#include <ac_fixed.h> +#include "sobel.h" +#include <iostream> + +// shift_class: page 119 HLS Blue Book +#include "shift_class.h" + + + + +#pragma hls_design top +void sobel(ac_int<PIXEL_WL*KERNEL_WIDTH,false> vin[NUM_PIXELS], ac_int<PIXEL_WL,false> vout[NUM_PIXELS]) +{ + ac_int<16, false> red, green, blue, r[KERNEL_WIDTH], g[KERNEL_WIDTH], b[KERNEL_WIDTH]; + + +// #if 1: use filter +// #if 0: copy input to output bypassing filter +#if 1 + + // shifts pixels from KERNEL_WIDTH rows and keeps KERNEL_WIDTH columns (KERNEL_WIDTHxKERNEL_WIDTH pixels stored) + static shift_class<ac_int<PIXEL_WL*KERNEL_WIDTH,true>, KERNEL_WIDTH> regs; + int i; + + FRAME: for(int p = 0; p < NUM_PIXELS; p++) { + // init + red = 0; + green = 0; + blue = 0; + RESET: for(i = 0; i < KERNEL_WIDTH; i++) { + r[i] = 0; + g[i] = 0; + b[i] = 0; + } + + // shift input data in the filter fifo + regs << vin[p]; // advance the pointer address by the pixel number (testbench/simulation only) + // accumulate + ACC1: + for (i = 0; i < KERNEL_WIDTH; ++i) + { + r[0] += (regs[i].slc<COLOUR_WL>(2*COLOUR_WL))*XMATRIX[0][i]*YMATRIX[0][i]; + g[0] += (regs[i].slc<COLOUR_WL>(COLOUR_WL))*XMATRIX[0][i]*YMATRIX[0][i]; + b[0] += (regs[i].slc<COLOUR_WL>(0))*XMATRIX[0][i]*YMATRIX[0][i]; + + r[1] += (regs[i].slc<COLOUR_WL>(2*COLOUR_WL + PIXEL_WL))*XMATRIX[1][i]*YMATRIX[1][i]; + g[1] += (regs[i].slc<COLOUR_WL>(COLOUR_WL + PIXEL_WL))*XMATRIX[1][i]*YMATRIX[1][i]; + b[1] += (regs[i].slc<COLOUR_WL>(0 + PIXEL_WL))*XMATRIX[1][i]*YMATRIX[1][i]; + + r[2] += (regs[i].slc<COLOUR_WL>(2*COLOUR_WL + 2*PIXEL_WL))*XMATRIX[2][i]*XMATRIX[2][i]; + g[2] += (regs[i].slc<COLOUR_WL>(COLOUR_WL + 2*PIXEL_WL))*XMATRIX[2][i]*XMATRIX[2][i]; + b[2] += (regs[i].slc<COLOUR_WL>(0 + 2*PIXEL_WL))*XMATRIX[2][i]*XMATRIX[2][i]; + } + // add the accumualted value for all processed lines + ACC2: + for(i = 0; i < KERNEL_WIDTH; i++) + { + red += r[i]; + green += g[i]; + blue += b[i]; + } + + // normalize result + red /= 2*KERNEL_NUMEL; + green /= 2*KERNEL_NUMEL; + blue /= 2*KERNEL_NUMEL; + + // group the RGB components into a single signal + vout[p] = ((((ac_int<PIXEL_WL, false>)red) << (2*COLOUR_WL)) | (((ac_int<PIXEL_WL, false>)green) << COLOUR_WL) | (ac_int<PIXEL_WL, false>)blue); + + } +} + + + + +#else +// display input (test only) + FRAME: for(p = 0; p < NUM_PIXELS; p++) { + // copy the value of each colour component from the input stream + red = vin[p].slc<COLOUR_WL>(2*COLOUR_WL); + green = vin[p].slc<COLOUR_WL>(COLOUR_WL); + blue = vin[p].slc<COLOUR_WL>(0); + + // combine the 3 color components into 1 signal only + vout[p] = ((((ac_int<PIXEL_WL, false>)red) << (2*COLOUR_WL)) | (((ac_int<PIXEL_WL, false>)green) << COLOUR_WL) | (ac_int<PIXEL_WL, false>)blue); + } +} +#endif + + +// end of file
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