Added a drunk filter and wrote the README.

src/filterSample/Makefile.am

@@ -8,4 +8,4 @@ AM_CXXFLAGS = 			\
 
 ______lib_libfilterSample_a_SOURCES = grey.cc reverse.cc merge.cc \
 	interlace.cc inlay.cc blur.cc cartoon.cc count.cc color.cc \
-	rotate.cc
+	rotate.cc drunk.cc

src/filterSample/drunk.cc

@@ -0,0 +1,33 @@
+#include "drunk.hh"
+
+#include "opencv2/opencv.hpp"
+
+void* Drunk::operator()(void* para)
+{
+  cv::Mat* mat = (cv::Mat*)para;
+
+  if (mat == nullptr)
+    return nullptr;
+
+  if (this->last_ == nullptr)
+  {
+    this->last_ = new cv::Mat();
+    *this->last_ = mat->clone();
+  }
+
+  auto it1 = mat->begin<cv::Vec3b>();
+  auto it2 = this->last_->begin<cv::Vec3b>();
+  while (it1 != mat->end<cv::Vec3b>() && it2 != this->last_->end<cv::Vec3b>())
+  {
+    (*it2)[0] = (*it1)[0] / 8 + (*it2)[0] * 7 / 8;
+    (*it2)[1] = (*it1)[1] / 8 + (*it2)[1] * 7 / 8;
+    (*it2)[2] = (*it1)[2] / 8 + (*it2)[2] * 7 / 8;
+    (*it1)[0] = (*it2)[0];
+    (*it1)[1] = (*it2)[1];
+    (*it1)[2] = (*it2)[2];
+    ++it1;
+    ++it2;
+  }
+
+  return mat;
+}

src/filterSample/drunk.hh

@@ -0,0 +1,16 @@
+#ifndef DRUNK_HH_
+# define DRUNK_HH_
+
+# include "tbb/pipeline.h"
+# include "opencv2/opencv.hpp"
+
+class Drunk: public tbb::filter
+{
+  public:
+    Drunk(): filter(tbb::filter::parallel), last_(nullptr) {}
+    void* operator()(void*);
+  private:
+    cv::Mat* last_;
+};
+
+#endif /* !DRUNK_HH_ */

src/main.cc

@@ -19,8 +19,8 @@ bool parse_cli(Configuration& conf, int argc, char** argv)
   desc.add_options()
     ("help,h", "produce help message")
     ("filter,f", po::value<std::vector<std::string>>(), "apply a filter; "
-     "choose between grey, reverse, cartoon, count, color=B,G,R, sepia, "
-     "blur[=X], merge, interlace, inlay=B,G,R, strictinlay=B,G,R")
+     "choose between grey, reverse, cartoon, drunk, count, color=B,G,R, sepia,"
+     " blur[=X], merge, interlace, inlay=B,G,R, strictinlay=B,G,R")
     ("input-file,i", po::value<std::vector<std::string>>(), "file to treat")
     ("output,o", po::value<std::string>(), "output file")
     ("codec,c", po::value<std::string>(), "output codec")

src/pipeline.cc

@@ -16,6 +16,7 @@
 #include "filterSample/count.hh"
 #include "filterSample/color.hh"
 #include "filterSample/rotate.hh"
+#include "filterSample/drunk.hh"
 
 Pipeline::Pipeline(std::list<VideoReader> input, VideoWriter output)
   : input_(input), output_(output)
@@ -35,6 +36,8 @@ bool Pipeline::add_filter(std::string filter, std::vector<int> args)
     this->pipeline_.add_filter(*(new Cartoon()));
   else if (filter == "count")
     this->pipeline_.add_filter(*(new Count()));
+  else if (filter == "drunk")
+    this->pipeline_.add_filter(*(new Drunk()));
   else if (filter == "rotate-h")
     this->pipeline_.add_filter(*(new Rotate(0)));
   else if (filter == "rotate-v")