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-rwxr-xr-xrealtime/realtime.py47
-rw-r--r--realtime/rt/aligner.py5
-rw-r--r--realtime/rt/decoder.py7
-rw-r--r--realtime/rt/util.py6
4 files changed, 54 insertions, 11 deletions
diff --git a/realtime/realtime.py b/realtime/realtime.py
index c169ce4c..1f67bed7 100755
--- a/realtime/realtime.py
+++ b/realtime/realtime.py
@@ -1,21 +1,24 @@
#!/usr/bin/env python
+
import argparse
-import os
+import collections
import logging
-import cdec.configobj
-import cdec.sa
+import os
import shutil
import sys
import subprocess
import tempfile
import time
+import cdec.configobj
+import cdec.sa
+
from rt import ForceAligner
from rt import MIRADecoder
class RealtimeDecoder:
- def __init__(self, configdir, tmpdir='/tmp'):
+ def __init__(self, configdir, tmpdir='/tmp', cache_size=5):
# Temporary work dir
self.tmp = tempfile.mkdtemp(dir=tmpdir)
@@ -31,6 +34,9 @@ class RealtimeDecoder:
# Grammar extractor
sa_config = os.path.join(configdir, 'sa.ini')
self.extractor = cdec.sa.GrammarExtractor(sa_config, online=True)
+ self.grammar_files = collections.deque()
+ self.grammar_dict = {}
+ self.cache_size = cache_size
# Decoder
decoder_config = os.path.join(configdir, 'cdec.ini')
@@ -45,10 +51,24 @@ class RealtimeDecoder:
shutil.rmtree(self.tmp)
def grammar(self, sentence):
+ grammar_file = self.grammar_dict.get(sentence, None)
+ # Cache hit
+ if grammar_file:
+ logging.info('Grammar cache hit')
+ return grammar_file
+ # Extract and cache
grammar_file = tempfile.mkstemp(dir=self.tmp)[1]
with open(grammar_file, 'w') as output:
for rule in self.extractor.grammar(sentence):
output.write(str(rule) + '\n')
+ if len(self.grammar_files) == self.cache_size:
+ rm_sent = self.grammar_files.popleft()
+ # If not already removed by learn method
+ if rm_sent in self.grammar_dict:
+ rm_grammar = self.grammar_dict.pop(rm_sent)
+ os.remove(rm_grammar)
+ self.grammar_files.append(sentence)
+ self.grammar_dict[sentence] = grammar_file
return grammar_file
def decode(self, sentence):
@@ -57,15 +77,21 @@ class RealtimeDecoder:
hyp = self.decoder.decode(sentence, grammar_file)
stop_time = time.time()
logging.info('Translation time: {} seconds'.format(stop_time - start_time))
- os.remove(grammar_file)
return hyp
def learn(self, source, target):
- alignment = self.aligner.align('{} ||| {}'.format(source, target))
+ # MIRA update before adding data to grammar extractor
+ grammar_file = self.grammar(source)
+ mira_log = self.decoder.update(source, grammar_file, target)
+ logging.info('MIRA: {}'.format(mira_log))
+ # Add aligned sentence pair to grammar extractor
+ alignment = self.aligner.align(source, target)
logging.info('Adding instance: {} ||| {} ||| {}'.format(source, target, alignment))
self.extractor.add_instance(source, target, alignment)
- # TODO: Add to LM
- # TODO: MIRA update
+ # Clear (old) cached grammar
+ rm_grammar = self.grammar_dict.pop(source)
+ os.remove(rm_grammar)
+ # TODO: Add to LM by writing to fifo
def main():
@@ -84,7 +110,10 @@ def main():
rtd = RealtimeDecoder(args.config)
try:
- for line in sys.stdin:
+ while True:
+ line = sys.stdin.readline()
+ if not line:
+ break
input = [f.strip() for f in line.split('|||')]
if len(input) == 1:
hyp = rtd.decode(input[0])
diff --git a/realtime/rt/aligner.py b/realtime/rt/aligner.py
index d94dbda0..4a0ace48 100644
--- a/realtime/rt/aligner.py
+++ b/realtime/rt/aligner.py
@@ -23,7 +23,10 @@ class ForceAligner:
self.rev_align = util.popen_io(rev_cmd)
self.tools = util.popen_io(tools_cmd)
- def align(self, line):
+ def align(self, source, target):
+ return self.align_formatted('{} ||| {}'.format(source, target))
+
+ def align_formatted(self, line):
self.fwd_align.stdin.write('{}\n'.format(line))
self.rev_align.stdin.write('{}\n'.format(line))
# f words ||| e words ||| links ||| score
diff --git a/realtime/rt/decoder.py b/realtime/rt/decoder.py
index 786bc07a..6bbef6f2 100644
--- a/realtime/rt/decoder.py
+++ b/realtime/rt/decoder.py
@@ -9,7 +9,7 @@ class Decoder:
self.decoder.stdin.close()
def decode(self, sentence, grammar):
- input = '<seg grammar="{g}">{s}</seg>\n'.format(i=id, s=sentence, g=grammar)
+ input = '<seg grammar="{g}">{s}</seg>\n'.format(s=sentence, g=grammar)
self.decoder.stdin.write(input)
return self.decoder.stdout.readline().strip()
@@ -29,3 +29,8 @@ class MIRADecoder(Decoder):
# optimizer=2 step=0.001 best=500, k=500, uniq, stream
mira_cmd = [mira, '-c', config, '-w', weights, '-o', '2', '-C', '0.001', '-b', '500', '-k', '500', '-u', '-t']
self.decoder = util.popen_io(mira_cmd)
+
+ def update(self, sentence, grammar, reference):
+ input = '<seg grammar="{g}">{s}</seg> ||| {r}\n'.format(s=sentence, g=grammar, r=reference)
+ self.decoder.stdin.write(input)
+ return self.decoder.stdout.readline().strip()
diff --git a/realtime/rt/util.py b/realtime/rt/util.py
index 7f877161..263e33fb 100644
--- a/realtime/rt/util.py
+++ b/realtime/rt/util.py
@@ -1,4 +1,5 @@
import subprocess
+import sys
import threading
def popen_io(cmd):
@@ -6,6 +7,11 @@ def popen_io(cmd):
consume_stream(p.stderr)
return p
+def popen_io_v(cmd):
+ sys.stderr.write('{}\n'.format(' '.join(cmd)))
+ p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
+ return p
+
def consume_stream(stream):
def consume(s):
for _ in s: