[Work] IBRraw format

IBRraw format

File header 
IBRraw.xdr
@@FileBaseName = orange_05_1
@@FileID = IBRraw
@@ImageDim = 2
@@ImageSize = 128 200
@@buffer-channels-0 = 3
@@buffer-primtype-0 = float
@@buffer-type-0 = color
---end-of-header---

Following the header is the image data.

Sample code for reading an IBRraw file

 
 void read_IBRraw_float(const char *filename, int *width, int *height, float **buf) {
    FILE *f=fopen(filename, "rb");
    if(f==NULL){
      perror("Error opening file");
    }

    string line;
    // read signature "IBRraw"
    line = GetLine(f);
    assert(line.substr(0,6) == "IBRraw");
    bool use_xdr = (line.substr(0,10) == "IBRraw.xdr");

    // read all parameters until end-of-header marker
    bool end_of_header=false;
    do {
      line = GetLine(f);
      end_of_header = line.substr(0,IBR_FFRAW_EOH.size()) == IBR_FFRAW_EOH;
      if(!end_of_header) {
        if(line.substr(2, IBR_FFRAW_SIZE.size()) == IBR_FFRAW_SIZE){
          sscanf(line.c_str(), "%d %d",&width, &height);
        }
      }
    } while(!feof(f) && !end_of_header);

    //allocate space
    int w=(*width);
    int h=(*height);
    (*buf) = new float[w*h*3];

    //read data
    fread((*buf),sizeof(float),w*h*3,f);
    if(use_xdr) {
      ntohl_buf(w*h*3, (uint32 *)(*buf) );
    }
    fclose(f);
  }