add preprocessing layers and change layer constructor interface

1 files changed, 24 insertions, 0 deletions

diff --git a/layer/bias.lua b/layer/bias.lua
new file mode 100644
index 0000000..6ddfe11
--- /dev/null
+++ b/layer/bias.lua
@@ -0,0 +1,24 @@
+local BiasLayer = nerv.class("nerv.BiasLayer", "nerv.Layer")
+
+function BiasLayer:__init(id, global_conf, layer_conf)
+    self.id = id
+    self.gconf = global_conf
+    self.bias = layer_conf.bias
+    self.dim_in = layer_conf.dim_in
+    self.dim_out = layer_conf.dim_out
+    self:check_dim_len(1, 1)
+end
+
+function BiasLayer:init()
+    if self.dim_in[1] ~= self.bias.trans:ncol() then
+        nerv.error("mismatching dimensions of input and bias parameter")
+    end
+    if self.dim_out[1] ~= self.bias.trans:ncol() then
+        nerv.error("mismatching dimensions of output and bias parameter")
+    end
+end
+
+function BiasLayer:propagate(input, output)
+    output[1]:copy_fromd(input[1])
+    output[1]:add_row(self.bias.trans, 1.0)
+end