activate: use a right audio player for mac osx

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>

precise/pocketsphinx/scripts/listen.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 from random import randint
-from subprocess import Popen
 from threading import Event
 
 from prettyparse import create_parser
@@ -21,6 +20,7 @@ from prettyparse import create_parser
 from precise.pocketsphinx.listener import PocketsphinxListener
 from precise_runner import PreciseRunner
 from precise_runner.runner import ListenerEngine
+from precise.util import play_audio
 
 usage = '''
     Run Pocketsphinx on microphone audio input
@@ -48,7 +48,7 @@ def main():
     args = create_parser(usage).parse_args()
 
     def on_activation():
-        Popen(['aplay', '-q', 'data/activate.wav'])
+        play_audio('data/activate.wav')
 
     def on_prediction(conf):
         print('!' if conf > 0.5 else '.', end='', flush=True)

precise/scripts/listen.py

@@ -14,14 +14,13 @@
 # limitations under the License.
 from os.path import join
 from random import randint
-from subprocess import Popen
 from threading import Event
 
 import numpy as np
 from prettyparse import create_parser
 
 from precise.network_runner import Listener
-from precise.util import save_audio, buffer_to_audio
+from precise.util import save_audio, buffer_to_audio, play_audio
 from precise_runner import PreciseRunner
 from precise_runner.runner import ListenerEngine
 
@@ -51,7 +50,8 @@ def main():
     args = create_parser(usage).parse_args()
 
     def on_activation():
-        Popen(['aplay', '-q', 'data/activate.wav'])
+        play_audio('data/activate.wav')
+
         if args.save_dir:
             global chunk_num
             nm = join(args.save_dir, args.save_prefix + session_id + '.' + str(chunk_num) + '.wav')

precise/util.py

@@ -55,6 +55,16 @@ def save_audio(filename: str, audio: np.ndarray):
     save_audio = (audio * np.iinfo(np.int16).max).astype(np.int16)
     wavio.write(filename, save_audio, pr.sample_rate, sampwidth=pr.sample_depth, scale='none')
 
+def play_audio(filename: str):
+    """
+    Args:
+        filename: Audio filename
+    """
+    import platform
+    from subprocess import Popen
+
+    player = 'play' if platform.system() == 'Darwin' else 'aplay'
+    Popen([player, '-q', filename])
 
 def glob_all(folder: str, filt: str) -> List[str]:
     """Recursive glob"""

runner/example.py

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 from argparse import ArgumentParser
-from subprocess import Popen
+from precise.util import play_audio
 from precise_runner import PreciseRunner, PreciseEngine
 from threading import Event
 
@@ -28,7 +28,7 @@ def main():
         print('!' if prob > 0.5 else '.', end='', flush=True)
 
     def on_activation():
-        Popen(['aplay', '-q', 'data/activate.wav'])
+        play_audio('data/activate.wav')
 
     engine = PreciseEngine(args.engine, args.model)
     PreciseRunner(engine, on_prediction=on_prediction, on_activation=on_activation,