Drop WebRTC audio data if OS has skipped frames.

media/base/audio_pull_fifo_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/bind.h"
 #include "base/bind_helpers.h"
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "media/base/audio_bus.h"
 #include "media/base/audio_pull_fifo.h"
@@ skipping 10 matching lines @@
 // Number of channels in each audio bus.
 static int kChannels = 2;
 
 // Max number of audio framed the FIFO can contain.
 static const int kMaxFramesInFifo = 2048;
 
 class AudioPullFifoTest
     : public testing::TestWithParam<int> {
  public:
   AudioPullFifoTest()
-    : pull_fifo_(kChannels, kMaxFramesInFifo, base::Bind(
-          &AudioPullFifoTest::ProvideInput, base::Unretained(this))),
-      audio_bus_(AudioBus::Create(kChannels, kMaxFramesInFifo)),
-      fill_value_(0),
-      last_frame_delay_(-1) {}
+      : pull_fifo_(kChannels,
+                   kMaxFramesInFifo,
+                   base::Bind(&AudioPullFifoTest::ProvideInput,
+                              base::Unretained(this))),
+        audio_bus_(AudioBus::Create(kChannels, kMaxFramesInFifo)),
+        fill_value_(0),
+        last_frame_delay_(-1) {
+    EXPECT_EQ(kMaxFramesInFifo, pull_fifo_.SizeInFrames());
+  }
   virtual ~AudioPullFifoTest() {}
 
   void VerifyValue(const float data[], int size, float start_value) {
     float value = start_value;
     for (int i = 0; i < size; ++i) {
       ASSERT_FLOAT_EQ(value++, data[i]) << "i=" << i;
     }
   }
 
   // Consume data using different sizes, acquire audio frames from the FIFO
@@ skipping 42 matching lines @@
   ConsumeTest(GetParam());
 }
 
 // Test common |frames_to_consume| values which will be used as input
 // parameter to AudioPullFifo::Consume() when the consumer asks for data.
 INSTANTIATE_TEST_CASE_P(
     AudioPullFifoTest, AudioPullFifoTest,
     testing::Values(544, 512, 512, 512, 512, 2048, 544, 441, 440, 433, 500));
 
 }  // namespace media