From 7f03ce8da24870f2757473385a75ed990b36d817 Mon Sep 17 00:00:00 2001
From: txh18 <cloudygooseg@gmail.com>
Date: Mon, 21 Dec 2015 13:36:54 +0800
Subject: added compressed_label support in the reader

---
 nerv/examples/lmptb/lm_trainer.lua        | 12 ++++++++++--
 nerv/examples/lmptb/lmptb/lmseqreader.lua | 19 ++++++++++++++++++-
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/nerv/examples/lmptb/lm_trainer.lua b/nerv/examples/lmptb/lm_trainer.lua
index eab6e2d..06c1a4c 100644
--- a/nerv/examples/lmptb/lm_trainer.lua
+++ b/nerv/examples/lmptb/lm_trainer.lua
@@ -23,6 +23,9 @@ function LMTrainer.lm_process_file_rnn(global_conf, fn, tnn, do_train, p_conf)
     end
     local reader
     local r_conf = {}
+    if p_conf.compressed_label ~= nil then
+        r_conf.compressed_label = p_conf.compressed_label
+    end
     local chunk_size, batch_size
     if p_conf.one_sen_report == true then --report log prob one by one sentence
         if do_train == true then
@@ -156,13 +159,16 @@ function LMTrainer.lm_process_file_birnn(global_conf, fn, tnn, do_train, p_conf)
     local reader
     local chunk_size, batch_size
     local r_conf = {["se_mode"] = true}
+    if p_conf.compressed_label ~= nil then
+        r_conf.compressed_label = p_conf.compressed_label
+    end
     if p_conf.one_sen_report == true then --report log prob one by one sentence
         if do_train == true then
             nerv.warning("LMTrainer.lm_process_file_birnn: warning, one_sen_report is true while do_train is also true, strange")
         end
         nerv.printf("lm_process_file_birnn: one_sen report mode, set batch_size to 1 and chunk_size to max_sen_len(%d)\n", 
                 global_conf.max_sen_len)
-        batch_size = 1 
+        batch_size = global_conf.batch_size
         chunk_size = global_conf.max_sen_len
     else
         batch_size = global_conf.batch_size
@@ -239,7 +245,9 @@ function LMTrainer.lm_process_file_birnn(global_conf, fn, tnn, do_train, p_conf)
         end
         if p_conf.one_sen_report == true then
             for i = 1, batch_size do
-                nerv.printf("LMTrainer.lm_process_file_birnn: one_sen_report_output, %f\n", sen_logp[i])    
+                if sen_logp[i] ~= nil then
+                    nerv.printf("LMTrainer.lm_process_file_birnn: one_sen_report_output, %f\n", sen_logp[i])    
+                end
             end
         end
 
diff --git a/nerv/examples/lmptb/lmptb/lmseqreader.lua b/nerv/examples/lmptb/lmptb/lmseqreader.lua
index b603911..0f29f8b 100644
--- a/nerv/examples/lmptb/lmptb/lmseqreader.lua
+++ b/nerv/examples/lmptb/lmptb/lmseqreader.lua
@@ -24,6 +24,10 @@ function LMReader:__init(global_conf, batch_size, chunk_size, vocab, r_conf)
     if r_conf.se_mode == true then
         self.se_mode = true
     end
+    self.compressed_label = false
+    if r_conf.compressed_label == true then
+        self.compressed_label = true
+    end
 end
 
 --fn: string
@@ -46,6 +50,9 @@ function LMReader:open_file(fn)
     for j = 1, self.chunk_size, 1 do
         self.bak_inputs_m[j] = {}
         self.bak_inputs_m[j][1] = self.gconf.mmat_type(self.batch_size, 1)
+        if self.compressed_label == true then
+            self.bak_inputs_m[j][2] = self.gconf.mmat_type(self.batch_size, 1)
+        end
         --self.bak_inputs_m[j][2] = self.gconf.mmat_type(self.batch_size, self.vocab:size()) --since MMatrix does not yet have fill, this m[j][2] is not used
     end
 end
@@ -118,6 +125,9 @@ function LMReader:get_batch(feeds)
                 end
                 inputs_s[j][i] = self.vocab.null_token
                 self.bak_inputs_m[j][1][i - 1][0] = 0
+                if self.compressed_label == true then
+                    self.bak_inputs_m[j][2][i - 1][0] = 0
+                end
                 labels_s[j][i] = self.vocab.null_token
             else
                 self:refresh_stream(i)
@@ -132,7 +142,11 @@ function LMReader:get_batch(feeds)
                 end
                 if st.store[st.head + 1] ~= nil then
                     labels_s[j][i] = st.store[st.head + 1]
-                    inputs_m[j][2][i - 1][self.vocab:get_word_str(st.store[st.head + 1]).id - 1] = 1
+                    if self.compressed_label == true then
+                        self.bak_inputs_m[j][2][i - 1][0] = self.vocab:get_word_str(st.store[st.head + 1]).id - 1
+                    else
+                        inputs_m[j][2][i - 1][self.vocab:get_word_str(st.store[st.head + 1]).id - 1] = 1
+                    end
                 else
                     if (inputs_s[j][i] ~= self.vocab.null_token) then
                         nerv.error("reader error : input not null but label is null_token")
@@ -169,6 +183,9 @@ function LMReader:get_batch(feeds)
             flagsPack[j] = bit.bor(flagsPack[j], flags[j][i])
         end
         inputs_m[j][1]:copy_fromh(self.bak_inputs_m[j][1])
+        if self.compressed_label == true then
+            inputs_m[j][2]:copy_fromh(self.bak_inputs_m[j][2])
+        end
     end
 
     --check for self.al_sen_start
-- 
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