Revert 290359 "Remove AudioBuffersState class."

trunk/src/media/audio/simple_sources_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 <limits>
 
 #include "base/logging.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/audio/audio_parameters.h"
 #include "media/audio/simple_sources.h"
 #include "media/base/audio_bus.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 // Validate that the SineWaveAudioSource writes the expected values.
 TEST(SimpleSources, SineWaveAudioSource) {
   static const uint32 samples = 1024;
   static const uint32 bytes_per_sample = 2;
   static const int freq = 200;
 
   AudioParameters params(
         AudioParameters::AUDIO_PCM_LINEAR, CHANNEL_LAYOUT_MONO,
         AudioParameters::kTelephoneSampleRate, bytes_per_sample * 8, samples);
 
   SineWaveAudioSource source(1, freq, params.sample_rate());
   scoped_ptr<AudioBus> audio_bus = AudioBus::Create(params);
-  source.OnMoreData(audio_bus.get(), 0);
+  source.OnMoreData(audio_bus.get(), AudioBuffersState());
   EXPECT_EQ(1, source.callbacks());
   EXPECT_EQ(0, source.errors());
 
   uint32 half_period = AudioParameters::kTelephoneSampleRate / (freq * 2);
 
   // Spot test positive incursion of sine wave.
   EXPECT_NEAR(0, audio_bus->channel(0)[0],
               std::numeric_limits<float>::epsilon());
   EXPECT_FLOAT_EQ(0.15643446f, audio_bus->channel(0)[1]);
   EXPECT_LT(audio_bus->channel(0)[1], audio_bus->channel(0)[2]);
   EXPECT_LT(audio_bus->channel(0)[2], audio_bus->channel(0)[3]);
   // Spot test negative incursion of sine wave.
   EXPECT_NEAR(0, audio_bus->channel(0)[half_period],
               std::numeric_limits<float>::epsilon());
   EXPECT_FLOAT_EQ(-0.15643446f, audio_bus->channel(0)[half_period + 1]);
   EXPECT_GT(audio_bus->channel(0)[half_period + 1],
             audio_bus->channel(0)[half_period + 2]);
   EXPECT_GT(audio_bus->channel(0)[half_period + 2],
             audio_bus->channel(0)[half_period + 3]);
 }
 
 TEST(SimpleSources, SineWaveAudioCapped) {
   SineWaveAudioSource source(1, 200, AudioParameters::kTelephoneSampleRate);
 
   static const int kSampleCap = 100;
   source.CapSamples(kSampleCap);
 
   scoped_ptr<AudioBus> audio_bus = AudioBus::Create(1, 2 * kSampleCap);
   EXPECT_EQ(source.OnMoreData(
-      audio_bus.get(), 0), kSampleCap);
+      audio_bus.get(), AudioBuffersState()), kSampleCap);
   EXPECT_EQ(1, source.callbacks());
-  EXPECT_EQ(source.OnMoreData(audio_bus.get(), 0), 0);
+  EXPECT_EQ(source.OnMoreData(audio_bus.get(), AudioBuffersState()), 0);
   EXPECT_EQ(2, source.callbacks());
   source.Reset();
   EXPECT_EQ(source.OnMoreData(
-      audio_bus.get(), 0), kSampleCap);
+      audio_bus.get(), AudioBuffersState()), kSampleCap);
   EXPECT_EQ(3, source.callbacks());
   EXPECT_EQ(0, source.errors());
 }
 
 TEST(SimpleSources, OnError) {
   SineWaveAudioSource source(1, 200, AudioParameters::kTelephoneSampleRate);
   source.OnError(NULL);
   EXPECT_EQ(1, source.errors());
   source.OnError(NULL);
   EXPECT_EQ(2, source.errors());
 }
 
 }  // namespace media