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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 <algorithm>
#include <cstdint>
#include <unordered_set>
#include <vector>
#include "bta/include/bta_gatt_api.h"
#include "bta/vc/types.h"
#include "include/hardware/bt_vc.h"
#include "types/raw_address.h"
namespace bluetooth {
namespace vc {
namespace internal {
class VolumeControlDevice {
public:
RawAddress address;
/* This is true only during first connection to profile, until we store the
* device
*/
bool first_connection;
/* we are making active attempt to connect to this device, 'direct connect'.
* This is true only during initial phase of first connection. */
bool connecting_actively;
bool service_changed_rcvd;
uint8_t volume;
uint8_t change_counter;
bool mute;
uint8_t flags;
uint16_t connection_id;
/* Volume Control Service */
uint16_t volume_state_handle;
uint16_t volume_state_ccc_handle;
uint16_t volume_control_point_handle;
uint16_t volume_flags_handle;
uint16_t volume_flags_ccc_handle;
VolumeOffsets audio_offsets;
bool device_ready; /* Set when device read server status and registgered for
notifications */
VolumeControlDevice(const RawAddress& address, bool first_connection)
: address(address),
first_connection(first_connection),
connecting_actively(first_connection),
service_changed_rcvd(false),
volume(0),
change_counter(0),
mute(false),
flags(0),
connection_id(GATT_INVALID_CONN_ID),
volume_state_handle(0),
volume_state_ccc_handle(0),
volume_control_point_handle(0),
volume_flags_handle(0),
volume_flags_ccc_handle(0),
device_ready(false) {}
~VolumeControlDevice() = default;
inline std::string ToString() { return address.ToString(); }
void DebugDump(int fd) {
std::stringstream stream;
stream << " == device address: " << address << " == \n";
if (connection_id == GATT_INVALID_CONN_ID)
stream << " Not connected\n";
else
stream << " Connected. Conn_id = " << connection_id << "\n";
stream << " volume: " << +volume << "\n"
<< " mute: " << +mute << "\n"
<< " flags: " << +flags << "\n"
<< " device read: " << device_ready << "\n"
<< " first_connection_: " << first_connection << "\n"
<< " connecting_actively_: " << connecting_actively << "\n";
dprintf(fd, "%s", stream.str().c_str());
audio_offsets.Dump(fd);
}
bool IsConnected() { return connection_id != GATT_INVALID_CONN_ID; }
void Disconnect(tGATT_IF gatt_if);
bool UpdateHandles(void);
void ResetHandles(void);
bool HasHandles(void) { return GATT_HANDLE_IS_VALID(volume_state_handle); }
void ControlPointOperation(uint8_t opcode, const std::vector<uint8_t>* arg,
GATT_WRITE_OP_CB cb, void* cb_data);
void GetExtAudioOutVolumeOffset(uint8_t ext_output_id, GATT_READ_OP_CB cb,
void* cb_data);
void SetExtAudioOutLocation(uint8_t ext_output_id, uint32_t location);
void GetExtAudioOutLocation(uint8_t ext_output_id, GATT_READ_OP_CB cb,
void* cb_data);
void GetExtAudioOutDescription(uint8_t ext_output_id, GATT_READ_OP_CB cb,
void* cb_data);
void SetExtAudioOutDescription(uint8_t ext_output_id, std::string& descr);
void ExtAudioOutControlPointOperation(uint8_t ext_output_id, uint8_t opcode,
const std::vector<uint8_t>* arg,
GATT_WRITE_OP_CB cb, void* cb_data);
bool IsEncryptionEnabled();
bool EnableEncryption(tBTM_SEC_CALLBACK* callback);
bool EnqueueInitialRequests(tGATT_IF gatt_if, GATT_READ_OP_CB chrc_read_cb,
GATT_WRITE_OP_CB cccd_write_cb);
void EnqueueRemainingRequests(tGATT_IF gatt_if, GATT_READ_OP_CB chrc_read_cb,
GATT_WRITE_OP_CB cccd_write_cb);
bool VerifyReady(uint16_t handle);
private:
/*
* This is used to track the pending GATT operation handles. Once the list is
* empty the device is assumed ready and connected. We are doing it because we
* want to make sure all the required characteristics and descritors are
* available on server side.
*/
std::unordered_set<uint16_t> handles_pending;
uint16_t find_ccc_handle(uint16_t chrc_handle);
bool set_volume_control_service_handles(const gatt::Service& service);
void set_volume_offset_control_service_handles(const gatt::Service& service);
bool subscribe_for_notifications(tGATT_IF gatt_if, uint16_t handle,
uint16_t ccc_handle, GATT_WRITE_OP_CB cb);
};
class VolumeControlDevices {
public:
void Add(const RawAddress& address, bool first_connection) {
if (FindByAddress(address) != nullptr) return;
devices_.emplace_back(address, first_connection);
}
void Remove(const RawAddress& address) {
for (auto it = devices_.begin(); it != devices_.end(); it++) {
if (it->address == address) {
it = devices_.erase(it);
break;
}
}
}
VolumeControlDevice* FindByAddress(const RawAddress& address) {
auto iter = std::find_if(devices_.begin(), devices_.end(),
[&address](const VolumeControlDevice& device) {
return device.address == address;
});
return (iter == devices_.end()) ? nullptr : &(*iter);
}
VolumeControlDevice* FindByConnId(uint16_t connection_id) {
auto iter =
std::find_if(devices_.begin(), devices_.end(),
[&connection_id](const VolumeControlDevice& device) {
return device.connection_id == connection_id;
});
return (iter == devices_.end()) ? nullptr : &(*iter);
}
size_t Size() { return (devices_.size()); }
void Clear() { devices_.clear(); }
void DebugDump(int fd) {
if (devices_.empty()) {
dprintf(fd, " No VC devices:\n");
} else {
dprintf(fd, " Devices:\n");
for (auto& device : devices_) {
device.DebugDump(fd);
}
}
}
void Disconnect(tGATT_IF gatt_if) {
for (auto& device : devices_) {
device.Disconnect(gatt_if);
}
}
void ControlPointOperation(std::vector<RawAddress>& devices, uint8_t opcode,
const std::vector<uint8_t>* arg,
GATT_WRITE_OP_CB cb, void* cb_data) {
for (auto& addr : devices) {
VolumeControlDevice* device = FindByAddress(addr);
if (device && device->IsConnected())
device->ControlPointOperation(opcode, arg, cb, cb_data);
}
}
private:
std::vector<VolumeControlDevice> devices_;
};
} // namespace internal
} // namespace vc
} // namespace bluetooth
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