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/*
* Copyright 2021 HIMSA II K/S - www.himsa.com.
* Represented by EHIMA - www.ehima.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <hardware/bluetooth.h>
#include <raw_address.h>
#include <variant>
namespace bluetooth {
namespace vc {
enum class ConnectionState {
DISCONNECTED = 0,
CONNECTING,
CONNECTED,
DISCONNECTING
};
class VolumeControlCallbacks {
public:
virtual ~VolumeControlCallbacks() = default;
/** Callback for profile connection state change */
virtual void OnConnectionState(ConnectionState state,
const RawAddress& address) = 0;
/* Callback for the volume change changed on the device */
virtual void OnVolumeStateChanged(const RawAddress& address, uint8_t volume,
bool mute, bool isAutonomous) = 0;
/* Callback for the volume change changed on the group*/
virtual void OnGroupVolumeStateChanged(int group_id, uint8_t volume,
bool mute, bool isAutonomous) = 0;
virtual void OnDeviceAvailable(const RawAddress& address,
uint8_t num_offset) = 0;
/* Callbacks for Volume Offset Control Service (VOCS) - Extended Audio Outputs
*/
virtual void OnExtAudioOutVolumeOffsetChanged(const RawAddress& address,
uint8_t ext_output_id,
int16_t offset) = 0;
virtual void OnExtAudioOutLocationChanged(const RawAddress& address,
uint8_t ext_output_id,
uint32_t location) = 0;
virtual void OnExtAudioOutDescriptionChanged(const RawAddress& address,
uint8_t ext_output_id,
std::string descr) = 0;
};
class VolumeControlInterface {
public:
virtual ~VolumeControlInterface() = default;
/** Register the Volume Control callbacks */
virtual void Init(VolumeControlCallbacks* callbacks) = 0;
/** Closes the interface */
virtual void Cleanup(void) = 0;
/** Connect to Volume Control */
virtual void Connect(const RawAddress& address) = 0;
/** Disconnect from Volume Control */
virtual void Disconnect(const RawAddress& address) = 0;
/** Called when Volume control devices is unbonded */
virtual void RemoveDevice(const RawAddress& address) = 0;
/** Set the volume */
virtual void SetVolume(std::variant<RawAddress, int> addr_or_group_id,
uint8_t volume) = 0;
/** Mute the volume */
virtual void Mute(std::variant<RawAddress, int> addr_or_group_id) = 0;
/** Unmute the volume */
virtual void Unmute(std::variant<RawAddress, int> addr_or_group_id) = 0;
virtual void GetExtAudioOutVolumeOffset(const RawAddress& address,
uint8_t ext_output_id) = 0;
virtual void SetExtAudioOutVolumeOffset(const RawAddress& address,
uint8_t ext_output_id,
int16_t offset_val) = 0;
virtual void GetExtAudioOutLocation(const RawAddress& address,
uint8_t ext_output_id) = 0;
virtual void SetExtAudioOutLocation(const RawAddress& address,
uint8_t ext_output_id,
uint32_t location) = 0;
virtual void GetExtAudioOutDescription(const RawAddress& address,
uint8_t ext_output_id) = 0;
virtual void SetExtAudioOutDescription(const RawAddress& address,
uint8_t ext_output_id,
std::string descr) = 0;
};
} /* namespace vc */
} /* namespace bluetooth */
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