add round_mode into pooling param

origin is BVLC/caffe@24b0905 and we have some fix

Author: vera121

include/caffe/layers/pooling_layer.hpp

@@ -55,6 +55,7 @@ class PoolingLayer : public Layer<Dtype> {
   Blob<int> max_idx_;
   int pad_type_; //CUSTOMIZATION
   bool ceil_mode_;
+  PoolingParameter_RoundMode round_mode_;
   int pad_l_; //CUSTOMIZATION
   int pad_r_; //CUSTOMIZATION
   int pad_t_; //CUSTOMIZATION

src/caffe/layers/pooling_layer.cpp

@@ -35,7 +35,25 @@ void PoolingLayer<Dtype>::LayerSetUp(const vector<Blob<Dtype>*>& bottom,
       || (!pool_param.has_stride_h() && !pool_param.has_stride_w()))
       << "Stride is stride OR stride_h and stride_w are required.";
   global_pooling_ = pool_param.global_pooling();
-  ceil_mode_ = pool_param.ceil_mode();
+
+  if(pool_param.has_round_mode())
+  {
+    round_mode_ = pool_param.round_mode();
+    switch (round_mode_) {
+     case PoolingParameter_RoundMode_CEIL:
+       ceil_mode_ = true;
+       break;
+     case PoolingParameter_RoundMode_FLOOR:
+       ceil_mode_ = false;
+       break;
+     default:
+         LOG(FATAL) << "Unknown rounding mode.";
+    }
+  }
+  else{
+    ceil_mode_ = pool_param.ceil_mode();
+  }
+
   if (global_pooling_) {
     kernel_h_ = bottom[0]->height();
     kernel_w_ = bottom[0]->width();

src/caffe/proto/caffe.proto

@@ -2212,6 +2212,12 @@ message PoolingParameter {
   optional bool global_pooling = 12 [default = false];
 
   optional bool ceil_mode = 14 [default = true]; // Specify floor/ceil mode rounding
+  // How to calculate the output size - using ceil (default) or floor rounding.
+  enum RoundMode {
+    CEIL = 0;
+    FLOOR = 1;
+  }
+  optional RoundMode round_mode = 15 [default = CEIL]; // functionality similar to ceil_mode; higher priority than ceil_mode
 }
 
 message Pooling3DParameter {