Third installement of low level audio for mac...

media/audio/mac/audio_output_mac_unittest.cc

 // Copyright (c) 2009 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/basictypes.h"
 #include "media/audio/audio_output.h"
 #include "media/audio/simple_sources.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 
@@ skipping 36 matching lines @@
   AudioManager* audio_man = AudioManager::GetAudioManager();
   ASSERT_TRUE(NULL != audio_man);
   if (!audio_man->HasAudioDevices())
     return;
   AudioOutputStream* oas =
       audio_man->MakeAudioStream(AudioManager::AUDIO_PCM_LINEAR, 2, 8000, 16);
   ASSERT_TRUE(NULL != oas);
   EXPECT_TRUE(oas->Open(1024));
   oas->Close();
 }
+
+// This test produces actual audio for 1.5 seconds on the default wave device at
+// 44.1K s/sec. Parameters have been chosen carefully so you should not hear
+// pops or noises while the sound is playing. The sound must also be identical
+// to the sound of PCMWaveStreamPlay200HzTone22KssMono test.
+TEST(MacAudioTest, PCMWaveStreamPlay200HzTone44KssMono) {
+  AudioManager* audio_man = AudioManager::GetAudioManager();
+  ASSERT_TRUE(NULL != audio_man);
+  if (!audio_man->HasAudioDevices())
+    return;
+  AudioOutputStream* oas =
+  audio_man->MakeAudioStream(AudioManager::AUDIO_PCM_LINEAR, 1,
+                             AudioManager::kAudioCDSampleRate, 16);
+  ASSERT_TRUE(NULL != oas);
+  
+  SineWaveAudioSource source(SineWaveAudioSource::FORMAT_16BIT_LINEAR_PCM, 1,
+                             200.0, AudioManager::kAudioCDSampleRate);
+  size_t bytes_100_ms = (AudioManager::kAudioCDSampleRate / 10) * 2;
+  
+  EXPECT_TRUE(oas->Open(bytes_100_ms));
+  oas->Start(&source);
+  usleep(1500000);
+  oas->Stop();
+  oas->Close();
+}
+
+// This test produces actual audio for 1.5 seconds on the default wave device at
+// 22K s/sec. Parameters have been chosen carefully so you should not hear pops
+// or noises while the sound is playing. The sound must also be identical to the
+// sound of PCMWaveStreamPlay200HzTone44KssMono test.
+TEST(MacAudioTest, PCMWaveStreamPlay200HzTone22KssMono) {
+  AudioManager* audio_man = AudioManager::GetAudioManager();
+  ASSERT_TRUE(NULL != audio_man);
+  if (!audio_man->HasAudioDevices())
+    return;
+  AudioOutputStream* oas =
+  audio_man->MakeAudioStream(AudioManager::AUDIO_PCM_LINEAR, 1,
+                             AudioManager::kAudioCDSampleRate/2, 16);
+  ASSERT_TRUE(NULL != oas);
+  
+  SineWaveAudioSource source(SineWaveAudioSource::FORMAT_16BIT_LINEAR_PCM, 1,
+                             200.0, AudioManager::kAudioCDSampleRate/2);
+  size_t bytes_100_ms = (AudioManager::kAudioCDSampleRate / 20) * 2;
+  
+  EXPECT_TRUE(oas->Open(bytes_100_ms));
+  oas->Start(&source);
+  usleep(1500000);  
+  oas->Stop();
+  oas->Close();
+}