streamtools/dedup.cpp

   1 #include "dedup.hpp"
   2 #include <cstring>
   3
   4 dedup::dedup(uint32_t max, uint32_t width, uint32_t height)
   5 {
   6         if(max)
   7                 framebuffer.resize(4 * width * height);
   8         bound = max;
   9         current = 0;    //First can't be dup.
  10 }
  11
  12 bool dedup::operator()(const uint8_t* buffer)
  13 {
  14         if(!bound)
  15                 return false;           //Dup detection disabled.
  16
  17         //Update buffer if not identical.
  18         bool is_dup = (current && !memcmp(&framebuffer[0], buffer, framebuffer.size()));
  19         if(!is_dup)
  20                 memcpy(&framebuffer[0], buffer, framebuffer.size());
  21
  22         //Decrement current if match, otherwise reset to bound
  23         current = is_dup ? (current - 1) : bound;
  24
  25         return is_dup;
  26 }