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// Copyright (c) 2013 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.
#ifndef CHROMEOS_AUDIO_AUDIO_DEVICE_H_
#define CHROMEOS_AUDIO_AUDIO_DEVICE_H_
#include <stdint.h>
#include <map>
#include <string>
#include <vector>
#include "chromeos/chromeos_export.h"
#include "chromeos/dbus/audio_node.h"
namespace chromeos {
// Ordered from the highest priority to the lowest.
enum AudioDeviceType {
AUDIO_TYPE_HEADPHONE,
AUDIO_TYPE_MIC,
AUDIO_TYPE_USB,
AUDIO_TYPE_BLUETOOTH,
AUDIO_TYPE_HDMI,
AUDIO_TYPE_INTERNAL_SPEAKER,
AUDIO_TYPE_INTERNAL_MIC,
AUDIO_TYPE_KEYBOARD_MIC,
AUDIO_TYPE_AOKR,
AUDIO_TYPE_POST_MIX_LOOPBACK,
AUDIO_TYPE_POST_DSP_LOOPBACK,
AUDIO_TYPE_OTHER,
};
struct CHROMEOS_EXPORT AudioDevice {
AudioDevice();
explicit AudioDevice(const AudioNode& node);
std::string ToString() const;
// Converts between the string type sent via D-Bus and AudioDeviceType.
// Static so they can be used by tests.
static std::string GetTypeString(chromeos::AudioDeviceType type);
static chromeos::AudioDeviceType GetAudioType(const std::string& node_type);
// Indicates that an input or output audio device is for simple usage like
// playback or recording for user. In contrast, audio device such as
// loopback, always on keyword recognition (AOKR), and keyboard mic are
// not for simple usage.
bool is_for_simple_usage() const {
return (type == AUDIO_TYPE_HEADPHONE ||
type == AUDIO_TYPE_INTERNAL_MIC ||
type == AUDIO_TYPE_MIC ||
type == AUDIO_TYPE_USB ||
type == AUDIO_TYPE_BLUETOOTH ||
type == AUDIO_TYPE_HDMI ||
type == AUDIO_TYPE_INTERNAL_SPEAKER);
}
bool is_input;
// Id of this audio device. The legacy |id| is assigned to be unique everytime
// when each device got plugged, so that the same physical device will have
// a different id after unplug then re-plug.
// The |stable_device_id| is designed to be persistent across system reboot
// and plug/unplug for the same physical device. It is guaranteed that
// different type of hardware has different |stable_device_id|, but not
// guaranteed to be different between the same kind of audio device, e.g
// USB headset. |id| and |stable_device_id| can be used together to achieve
// various goals.
uint64_t id;
uint64_t stable_device_id;
std::string display_name;
std::string device_name;
std::string mic_positions;
AudioDeviceType type;
uint8_t priority;
bool active;
uint64_t plugged_time;
};
typedef std::vector<AudioDevice> AudioDeviceList;
typedef std::map<uint64_t, AudioDevice> AudioDeviceMap;
struct AudioDeviceCompare {
// Rules used to discern which device is higher,
// 1.) Device Type:
// [Headphones/USB/Bluetooh > HDMI > Internal Speakers]
// [External Mic/USB Mic/Bluetooth > Internal Mic]
// 2.) Device Plugged in Time:
// [Later > Earlier]
bool operator()(const chromeos::AudioDevice& a,
const chromeos::AudioDevice& b) const {
if (a.priority < b.priority) {
return true;
} else if (b.priority < a.priority) {
return false;
} else if (a.plugged_time < b.plugged_time) {
return true;
} else {
return false;
}
}
};
} // namespace chromeos
#endif // CHROMEOS_AUDIO_AUDIO_DEVICE_H_
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