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// 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 <CoreAudio/AudioHardware.h>
#include "base/at_exit.h"
#include "media/audio/fake_audio_output_stream.h"
#include "media/audio/mac/audio_manager_mac.h"
#include "media/audio/mac/audio_output_mac.h"
bool AudioManagerMac::HasAudioDevices() {
AudioDeviceID output_device_id = kAudioObjectUnknown;
AudioObjectPropertyAddress property_address = {
kAudioHardwarePropertyDefaultOutputDevice, // mSelector
kAudioObjectPropertyScopeGlobal, // mScope
kAudioObjectPropertyElementMaster // mElement
};
size_t output_device_id_size = sizeof(output_device_id);
OSStatus err = AudioObjectGetPropertyData(kAudioObjectSystemObject,
&property_address,
0, // inQualifierDataSize
NULL, // inQualifierData
&output_device_id_size,
&output_device_id);
return err == kAudioHardwareNoError &&
output_device_id != kAudioObjectUnknown;
}
AudioOutputStream* AudioManagerMac::MakeAudioStream(Format format, int channels,
int sample_rate,
char bits_per_sample) {
if (format == AUDIO_MOCK)
return FakeAudioOutputStream::MakeFakeStream();
else if (format != AUDIO_PCM_LINEAR)
return NULL;
return new PCMQueueOutAudioOutputStream(this, channels, sample_rate,
bits_per_sample);
}
void AudioManagerMac::MuteAll() {
// TODO(cpu): implement.
}
void AudioManagerMac::UnMuteAll() {
// TODO(cpu): implement.
}
// Called by the stream when it has been released by calling Close().
void AudioManagerMac::ReleaseStream(PCMQueueOutAudioOutputStream* stream) {
delete stream;
}
namespace {
AudioManagerMac* g_audio_manager = NULL;
} // namespace.
void DestroyAudioManagerMac(void* param) {
delete g_audio_manager;
g_audio_manager = NULL;
}
// By convention, the AudioManager is not thread safe.
AudioManager* AudioManager::GetAudioManager() {
if (!g_audio_manager) {
g_audio_manager = new AudioManagerMac();
base::AtExitManager::RegisterCallback(&DestroyAudioManagerMac, NULL);
}
return g_audio_manager;
}
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