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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "build/build_config.h"
      6 #include "media/base/audio_hardware_config.h"
      7 #include "media/audio/audio_parameters.h"
      8 #include "testing/gtest/include/gtest/gtest.h"
      9 
     10 namespace media {
     11 
     12 static const int kOutputBufferSize = 2048;
     13 static const int kOutputSampleRate = 48000;
     14 static const ChannelLayout kOutputChannelLayout = CHANNEL_LAYOUT_STEREO;
     15 static const int kInputSampleRate = 44100;
     16 static const ChannelLayout kInputChannelLayout = CHANNEL_LAYOUT_STEREO;
     17 
     18 TEST(AudioHardwareConfig, Getters) {
     19   AudioParameters input_params(
     20       AudioParameters::AUDIO_PCM_LOW_LATENCY,
     21       kInputChannelLayout,
     22       kInputSampleRate,
     23       16,
     24       kOutputBufferSize);
     25 
     26   AudioParameters output_params(
     27       AudioParameters::AUDIO_PCM_LOW_LATENCY,
     28       kOutputChannelLayout,
     29       kOutputSampleRate,
     30       16,
     31       kOutputBufferSize);
     32 
     33   AudioHardwareConfig fake_config(input_params, output_params);
     34 
     35   EXPECT_EQ(kOutputBufferSize, fake_config.GetOutputBufferSize());
     36   EXPECT_EQ(kOutputSampleRate, fake_config.GetOutputSampleRate());
     37   EXPECT_EQ(kInputSampleRate, fake_config.GetInputSampleRate());
     38   EXPECT_EQ(kInputChannelLayout, fake_config.GetInputChannelLayout());
     39 }
     40 
     41 TEST(AudioHardwareConfig, Setters) {
     42   AudioParameters input_params(
     43       AudioParameters::AUDIO_PCM_LOW_LATENCY,
     44       kInputChannelLayout,
     45       kInputSampleRate,
     46       16,
     47       kOutputBufferSize);
     48 
     49   AudioParameters output_params(
     50       AudioParameters::AUDIO_PCM_LOW_LATENCY,
     51       kOutputChannelLayout,
     52       kOutputSampleRate,
     53       16,
     54       kOutputBufferSize);
     55 
     56   AudioHardwareConfig fake_config(input_params, output_params);
     57 
     58   // Verify output parameters.
     59   const int kNewOutputBufferSize = kOutputBufferSize * 2;
     60   const int kNewOutputSampleRate = kOutputSampleRate * 2;
     61   EXPECT_NE(kNewOutputBufferSize, fake_config.GetOutputBufferSize());
     62   EXPECT_NE(kNewOutputSampleRate, fake_config.GetOutputSampleRate());
     63 
     64   AudioParameters new_output_params(
     65       AudioParameters::AUDIO_PCM_LOW_LATENCY,
     66       kOutputChannelLayout,
     67       kNewOutputSampleRate,
     68       16,
     69       kNewOutputBufferSize);
     70   fake_config.UpdateOutputConfig(new_output_params);
     71   EXPECT_EQ(kNewOutputBufferSize, fake_config.GetOutputBufferSize());
     72   EXPECT_EQ(kNewOutputSampleRate, fake_config.GetOutputSampleRate());
     73 
     74   // Verify input parameters.
     75   const int kNewInputSampleRate = kInputSampleRate * 2;
     76   const ChannelLayout kNewInputChannelLayout = CHANNEL_LAYOUT_MONO;
     77   EXPECT_NE(kNewInputSampleRate, fake_config.GetInputSampleRate());
     78   EXPECT_NE(kNewInputChannelLayout, fake_config.GetInputChannelLayout());
     79 
     80   AudioParameters new_input_params(
     81       AudioParameters::AUDIO_PCM_LOW_LATENCY,
     82       kNewInputChannelLayout,
     83       kNewInputSampleRate,
     84       16,
     85       kOutputBufferSize);
     86   fake_config.UpdateInputConfig(new_input_params);
     87   EXPECT_EQ(kNewInputSampleRate, fake_config.GetInputSampleRate());
     88   EXPECT_EQ(kNewInputChannelLayout, fake_config.GetInputChannelLayout());
     89 }
     90 
     91 TEST(AudioHardwareConfig, HighLatencyBufferSizes) {
     92   AudioParameters input_params(AudioParameters::AUDIO_PCM_LOW_LATENCY,
     93                                kInputChannelLayout,
     94                                kInputSampleRate,
     95                                16,
     96                                kOutputBufferSize);
     97   AudioParameters output_params(AudioParameters::AUDIO_PCM_LOW_LATENCY,
     98                                 kOutputChannelLayout,
     99                                 3200,
    100                                 16,
    101                                 32);
    102   AudioHardwareConfig fake_config(input_params, output_params);
    103 
    104 #if defined(OS_WIN)
    105   for (int i = 6400; i <= 204800; i *= 2) {
    106     fake_config.UpdateOutputConfig(
    107         AudioParameters(AudioParameters::AUDIO_PCM_LOW_LATENCY,
    108                         kOutputChannelLayout,
    109                         i,
    110                         16,
    111                         i / 100));
    112     EXPECT_EQ(2 * (i / 100), fake_config.GetHighLatencyBufferSize());
    113   }
    114 #else
    115   EXPECT_EQ(64, fake_config.GetHighLatencyBufferSize());
    116 
    117   for (int i = 6400; i <= 204800; i *= 2) {
    118     fake_config.UpdateOutputConfig(
    119         AudioParameters(AudioParameters::AUDIO_PCM_LOW_LATENCY,
    120                         kOutputChannelLayout,
    121                         i,
    122                         16,
    123                         32));
    124     EXPECT_EQ(2 * (i / 100), fake_config.GetHighLatencyBufferSize());
    125   }
    126 #endif  // defined(OS_WIN)
    127 }
    128 
    129 }  // namespace content
    130