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mpisearchMex.cc

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/*
 *  mpisearchMex.cc
 * 
 *  Matlab interface for calling C++ mpisearch face detector from matlab  
 *
 *  Created by Ian Fasel on Thu Apr 18 2002.
 * 
 *  Copyright (c) 2003 Machine Perception Laboratory
 *  University of California San Diego.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 *    3. The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */


#include "mpisearchMex.h"
#include "ci.h"
#include <iostream>   //TESTING!

extern "C" {
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <sys/time.h>
#include <unistd.h>
#include "mex.h" 
#include "matrix.h"  
}

static inline double difftv(const struct timeval &t1, const struct timeval &t0)
{ return( (t1.tv_sec -t0.tv_sec )*1.0 +(t1.tv_usec-t0.tv_usec)*1e-6); }

extern "C" {
void mexFunction(int nlhs,mxArray *plhs[],int nrhs, const mxArray *prhs[]);
}

void mexFunction(int nlhs,mxArray*plhs[],int nrhs, const mxArray*prhs[]) 
{
  //[boxes, detects, n, index_array, output_values] = mpisearchMex(ci, img, get_detects, do_simplify, box, index_array, output_values)
  // check and get input / output
  if (nlhs < 3 )
    mexErrMsgTxt("mpisearchMex: requires at least three outputs");
  if (nrhs < 5)
    mexErrMsgTxt("mpisearchMex: requires at least five inputs");
  
  const mxArray ** ci = &(prhs[0]);
  double * img = mxGetPr(prhs[1]);
  int rows = static_cast<int>(mxGetM(prhs[1]));
  int cols = static_cast<int>(mxGetN(prhs[1]));
  int max_num_detects = static_cast<int>(mxGetScalar(prhs[2]));
  int do_simplify = static_cast<int>(mxGetScalar(prhs[3]));
  int box = static_cast<int>(mxGetScalar(prhs[4]));
  double *index_flags=NULL, *output_values=NULL;
  int reset_aH = 1;

  // Should change this to automatically create the appropriate memory if needed, but will do it later
  if(nlhs > 3){
    if(nrhs <= 5)
      mexErrMsgTxt("mpisearchMex: you must input the index_flags array if you also want it as output");

    plhs[3] = mxCreateNumericMatrix(mxGetM(prhs[5]),mxGetN(prhs[5]), mxDOUBLE_CLASS, 0);
    index_flags = mxGetPr(plhs[3]);
    double *input_index_flags = mxGetPr(prhs[5]);
    int index_len = max(mxGetM(prhs[5]),mxGetN(prhs[5]));
    for(int i = 0; i < index_len; ++i)
      index_flags[i] = input_index_flags[i];
  }
  if(nlhs > 4){
    if(nrhs <= 6)
      mexErrMsgTxt("mpisearchMex: you must input the output_values array if you also want it as output");
    plhs[4] = mxCreateNumericMatrix(mxGetM(prhs[6]),mxGetN(prhs[6]), mxDOUBLE_CLASS, 0);
    output_values = mxGetPr(plhs[4]);
    double *input_output_values = mxGetPr(prhs[6]);
    int output_len = max(mxGetM(prhs[6]),mxGetN(prhs[6]));
    for(int i = 0; i < output_len; ++i)
      output_values[i] = input_output_values[i];
  }
  
  if(nrhs >= 8){
    reset_aH = static_cast<int>(mxGetScalar(prhs[7]));
  } else
    reset_aH = 1;


  // create image and make upright (i.e., transpose)
  RImage<float> pixels(cols, rows);
  //cout << "Image: " 
  //    << pixels.width 
  //     << "x" << pixels.height 
  //     << endl;
  int ct = 0;
  for (int c = 0; c < cols; c++){
    for(int r = 0; r < rows; r++){ 
      pixels.array[cols*r+c] = static_cast<float>(*(img++));
    }
  }

  // Initialize the MPISearchMex object
  struct timeval tv_now, last;
  gettimeofday(&last,0);
  MPISearchMex *mpisearch = new MPISearchMex((mxIsStruct(prhs[0]) ? ci : NULL), max_num_detects, plhs[1]);
  gettimeofday(&tv_now,0);
  //cout << "Loading the data took "<< difftv(tv_now, last) << " seconds" << endl;

  // Search
  FaceBoxList faces;
  //cout << "Starting Search" << endl;
  gettimeofday(&last,0);
  plhs[2] = mxCreateNumericMatrix(1, 1, mxDOUBLE_CLASS, mxREAL);
  *(mxGetPr(plhs[2])) = mpisearch->search(pixels, faces, 0, 1, index_flags, output_values, box);
  gettimeofday(&tv_now,0);
  //cout << "   The search took "<< difftv(tv_now, last) << " seconds" << endl;

  // Simplify if necessary
  if(do_simplify){
    printf("Initially found %d faces.\n", faces.size());
    faces.simplify(0.24f);
    printf("Now found %d.\n", faces.size());
  }

  // write out face boxes into a matlab happy array
  int nBoxes = faces.size();
  plhs[2] = mxCreateNumericMatrix(1, 1, mxDOUBLE_CLASS, 0);
  *mxGetPr(plhs[2]) = nBoxes;
  plhs[0] = mxCreateNumericMatrix(nBoxes, 6, mxDOUBLE_CLASS, 0);
  if(nBoxes != 0) {
    double * boxes = mxGetPr(plhs[0]);
    int boxCounter = 0;
    while(!faces.empty( ))
      {
        Square face = faces.front();  
        faces.pop_front();
        boxes[nBoxes*0+boxCounter] = 1;
        boxes[nBoxes*1+boxCounter] = 1;
        boxes[nBoxes*2+boxCounter] = face.y;
        boxes[nBoxes*3+boxCounter] = face.y + face.size;
        boxes[nBoxes*4+boxCounter] = face.x;
        boxes[nBoxes*5+boxCounter] = face.x + face.size;
        boxCounter++;
      }
  }

  // Properly dimension the patches array;
  if(max_num_detects){
    double *ptr;
    void *newptr;
    ptr = mxGetPr(plhs[1]);
    newptr = mxRealloc(ptr,static_cast<int>(sizeof(*ptr) * 
                           (mpisearch->patchSize()*mpisearch->patchSize()*min(nBoxes, max_num_detects))));
    mxSetPr(plhs[1],static_cast<double *>(newptr));
    int dims[3] = {mpisearch->patchSize(), mpisearch->patchSize(), min(nBoxes, max_num_detects)};
    mxSetDimensions(plhs[1], dims, 3);
  }

  delete mpisearch;
}

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