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// Copyright 2014 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 "extensions/shell/browser/shell_audio_controller_chromeos.h"
#include <algorithm>
#include "chromeos/audio/audio_device.h"
namespace extensions {
namespace {
// Returns a pointer to the device in |devices| with ID |node_id|, or NULL if it
// isn't present.
const chromeos::AudioDevice* GetDevice(const chromeos::AudioDeviceList& devices,
uint64_t node_id) {
for (chromeos::AudioDeviceList::const_iterator it = devices.begin();
it != devices.end(); ++it) {
if (it->id == node_id)
return &(*it);
}
return NULL;
}
} // namespace
ShellAudioController::ShellAudioController() {
chromeos::CrasAudioHandler::Get()->AddAudioObserver(this);
ActivateDevices();
}
ShellAudioController::~ShellAudioController() {
chromeos::CrasAudioHandler::Get()->RemoveAudioObserver(this);
}
void ShellAudioController::OnOutputNodeVolumeChanged(uint64_t /* node_id */,
int /* volume */) {
}
void ShellAudioController::OnOutputMuteChanged(bool /* mute_on */,
bool /* system_adjust */) {}
void ShellAudioController::OnInputNodeGainChanged(uint64_t /* node_id */,
int /* gain */) {
}
void ShellAudioController::OnInputMuteChanged(bool /* mute_on */) {
}
void ShellAudioController::OnAudioNodesChanged() {
VLOG(1) << "Audio nodes changed";
ActivateDevices();
}
void ShellAudioController::OnActiveOutputNodeChanged() {}
void ShellAudioController::OnActiveInputNodeChanged() {}
void ShellAudioController::ActivateDevices() {
chromeos::CrasAudioHandler* handler = chromeos::CrasAudioHandler::Get();
chromeos::AudioDeviceList devices;
handler->GetAudioDevices(&devices);
sort(devices.begin(), devices.end(), chromeos::AudioDeviceCompare());
uint64_t best_input = 0, best_output = 0;
for (chromeos::AudioDeviceList::const_reverse_iterator it = devices.rbegin();
it != devices.rend() && (!best_input || !best_output); ++it) {
// TODO(derat): Need to check |plugged_time|?
if (it->is_input && !best_input)
best_input = it->id;
else if (!it->is_input && !best_output)
best_output = it->id;
}
if (best_input && best_input != handler->GetPrimaryActiveInputNode()) {
const chromeos::AudioDevice* device = GetDevice(devices, best_input);
DCHECK(device);
VLOG(1) << "Activating input device: " << device->ToString();
handler->SwitchToDevice(*device, true,
chromeos::CrasAudioHandler::ACTIVATE_BY_USER);
}
if (best_output && best_output != handler->GetPrimaryActiveOutputNode()) {
const chromeos::AudioDevice* device = GetDevice(devices, best_output);
DCHECK(device);
VLOG(1) << "Activating output device: " << device->ToString();
handler->SwitchToDevice(*device, true,
chromeos::CrasAudioHandler::ACTIVATE_BY_USER);
}
}
} // namespace extensions
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