alsa_output: Drain and pause pcm when stopping.

media/audio/linux/alsa_output_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/message_loop.h"
 #include "base/stringprintf.h"
 #include "media/audio/linux/alsa_output.h"
 #include "media/audio/linux/alsa_wrapper.h"
 #include "media/audio/linux/audio_manager_linux.h"
 #include "media/base/data_buffer.h"
@@ skipping 25 matching lines @@
   MOCK_METHOD3(DeviceNameHint, int(int card,
                                    const char* iface,
                                    void*** hints));
   MOCK_METHOD2(DeviceNameGetHint, char*(const void* hint, const char* id));
   MOCK_METHOD1(DeviceNameFreeHint, int(void** hints));
 
   MOCK_METHOD4(PcmOpen, int(snd_pcm_t** handle, const char* name,
                             snd_pcm_stream_t stream, int mode));
   MOCK_METHOD1(PcmClose, int(snd_pcm_t* handle));
   MOCK_METHOD1(PcmPrepare, int(snd_pcm_t* handle));
+  MOCK_METHOD1(PcmDrain, int(snd_pcm_t* handle));
   MOCK_METHOD1(PcmDrop, int(snd_pcm_t* handle));
   MOCK_METHOD2(PcmDelay, int(snd_pcm_t* handle, snd_pcm_sframes_t* delay));
   MOCK_METHOD3(PcmWritei, snd_pcm_sframes_t(snd_pcm_t* handle,
                                             const void* buffer,
                                             snd_pcm_uframes_t size));
   MOCK_METHOD3(PcmReadi, snd_pcm_sframes_t(snd_pcm_t* handle,
                                            void* buffer,
                                            snd_pcm_uframes_t size));
   MOCK_METHOD3(PcmRecover, int(snd_pcm_t* handle, int err, int silent));
   MOCK_METHOD7(PcmSetParams, int(snd_pcm_t* handle, snd_pcm_format_t format,
@@ skipping 395 matching lines @@
       .Times(AtLeast(3))
       .WillOnce(Return(kTestFramesPerPacket))  // Buffer is empty.
       .WillOnce(Return(kTestFramesPerPacket))
       .WillRepeatedly(DoAll(InvokeWithoutArgs(&message_loop_,
                                               &MessageLoop::QuitNow),
                                               Return(0)));  // Buffer is full.
 
   test_stream->Start(&mock_callback);
   message_loop_.RunAllPending();
 
+  EXPECT_CALL(mock_alsa_wrapper_, PcmDrain(kFakeHandle))
+      .WillOnce(Return(0));
+  test_stream->Stop();
+
   EXPECT_CALL(mock_alsa_wrapper_, PcmClose(kFakeHandle))
       .WillOnce(Return(0));
   EXPECT_CALL(mock_alsa_wrapper_, PcmName(kFakeHandle))
       .WillOnce(Return(kTestDeviceName));
   test_stream->Close();
 }
 
 TEST_F(AlsaPcmOutputStreamTest, WritePacket_FinishedPacket) {
   AlsaPcmOutputStream* test_stream = CreateStream(kTestChannelLayout);
   InitBuffer(test_stream);
@@ skipping 347 matching lines @@
 
   // TODO(ajwong): Find a way to test whether or not another task has been
   // posted so we can verify that the Alsa code will indeed break the task
   // posting loop.
 
   test_stream->TransitionTo(AlsaPcmOutputStream::kIsClosed);
   test_stream->Close();
 }
 
 }  // namespace media