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#pragma once
#include <array>
#include <atomic>
#include <map>
#include <mutex>
#include <optional>
#include <string>
#include <vector>
#include <freertos/FreeRTOS.h>
#include <freertos/stream_buffer.h>
#include <stdint.h>
#include "bluetooth_types.hpp"
#include "esp_a2dp_api.h"
#include "esp_avrc_api.h"
#include "esp_gap_bt_api.h"
#include "nvs.hpp"
#include "tinyfsm.hpp"
#include "tinyfsm/include/tinyfsm.hpp"
namespace drivers {
/*
* A handle used to interact with the bluetooth state machine.
*/
class Bluetooth {
public:
Bluetooth(NvsStorage& storage);
auto Enable() -> bool;
auto Disable() -> void;
auto IsEnabled() -> bool;
auto IsConnected() -> bool;
auto ConnectedDevice() -> std::optional<bluetooth::Device>;
/*
* Sets whether or not the bluetooth stack is allowed to actively scan for
* new devices.
*/
auto SetDeviceDiscovery(bool) -> void;
auto IsDiscovering() -> bool;
auto KnownDevices() -> std::vector<bluetooth::Device>;
auto SetPreferredDevice(std::optional<bluetooth::MacAndName> dev) -> void;
auto PreferredDevice() -> std::optional<bluetooth::MacAndName>;
auto SetSource(StreamBufferHandle_t) -> void;
auto SetVolume(uint8_t) -> void;
auto SetEventHandler(std::function<void(bluetooth::Event)> cb) -> void;
};
namespace bluetooth {
namespace events {
struct Enable : public tinyfsm::Event {};
struct Disable : public tinyfsm::Event {};
struct PreferredDeviceChanged : public tinyfsm::Event {};
struct SourceChanged : public tinyfsm::Event {};
struct DiscoveryChanged : public tinyfsm::Event {};
struct DeviceDiscovered : public tinyfsm::Event {
const Device& device;
};
struct ChangeVolume : public tinyfsm::Event {
const uint8_t volume;
};
namespace internal {
struct Gap : public tinyfsm::Event {
esp_bt_gap_cb_event_t type;
esp_bt_gap_cb_param_t* param;
};
struct A2dp : public tinyfsm::Event {
esp_a2d_cb_event_t type;
esp_a2d_cb_param_t* param;
};
struct Avrc : public tinyfsm::Event {
esp_avrc_ct_cb_event_t type;
esp_avrc_ct_cb_param_t* param;
};
} // namespace internal
} // namespace events
/*
* Utility for managing scanning, independent of the current connection state.
*/
class Scanner {
public:
Scanner();
auto ScanContinuously() -> void;
auto ScanOnce() -> void;
auto StopScanning() -> void;
auto StopScanningNow() -> void;
auto HandleGapEvent(const events::internal::Gap&) -> void;
private:
bool enabled_;
bool is_discovering_;
auto HandleDeviceDiscovery(const esp_bt_gap_cb_param_t& param) -> void;
};
class BluetoothState : public tinyfsm::Fsm<BluetoothState> {
public:
static auto Init(NvsStorage& storage) -> void;
static auto devices() -> std::vector<Device>;
static auto preferred_device() -> std::optional<bluetooth::MacAndName>;
static auto preferred_device(std::optional<bluetooth::MacAndName>) -> void;
static auto scanning() -> bool;
static auto discovery() -> bool;
static auto discovery(bool) -> void;
static auto source() -> StreamBufferHandle_t;
static auto source(StreamBufferHandle_t) -> void;
static auto event_handler(std::function<void(Event)>) -> void;
virtual ~BluetoothState(){};
virtual void entry() {}
virtual void exit() {}
virtual void react(const events::Enable& ev){};
virtual void react(const events::Disable& ev) = 0;
virtual void react(const events::PreferredDeviceChanged& ev){};
virtual void react(const events::SourceChanged& ev){};
virtual void react(const events::DiscoveryChanged&);
virtual void react(const events::ChangeVolume&) {}
virtual void react(const events::DeviceDiscovered&);
virtual void react(const events::internal::Gap& ev) = 0;
virtual void react(const events::internal::A2dp& ev){};
virtual void react(const events::internal::Avrc& ev){};
protected:
static NvsStorage* sStorage_;
static Scanner* sScanner_;
static std::mutex sDevicesMutex_;
static std::map<mac_addr_t, Device> sDevices_;
static std::optional<bluetooth::MacAndName> sPreferredDevice_;
static std::optional<bluetooth::MacAndName> sConnectingDevice_;
static bool sIsDiscoveryAllowed_;
static std::atomic<StreamBufferHandle_t> sSource_;
static std::function<void(Event)> sEventHandler_;
};
class Disabled : public BluetoothState {
public:
void entry() override;
void exit() override;
void react(const events::Enable& ev) override;
void react(const events::Disable& ev) override{};
void react(const events::internal::Gap& ev) override {}
void react(const events::internal::A2dp& ev) override {}
void react(const events::DiscoveryChanged& ev) override{};
using BluetoothState::react;
};
class Idle : public BluetoothState {
public:
void entry() override;
void react(const events::Disable& ev) override;
void react(const events::PreferredDeviceChanged& ev) override;
void react(const events::internal::Gap& ev) override;
using BluetoothState::react;
};
class Connecting : public BluetoothState {
public:
void entry() override;
void exit() override;
void react(const events::PreferredDeviceChanged& ev) override;
void react(const events::Disable& ev) override;
void react(const events::internal::Gap& ev) override;
void react(const events::internal::A2dp& ev) override;
using BluetoothState::react;
};
class Connected : public BluetoothState {
public:
void entry() override;
void exit() override;
void react(const events::PreferredDeviceChanged& ev) override;
void react(const events::SourceChanged& ev) override;
void react(const events::ChangeVolume&) override;
void react(const events::Disable& ev) override;
void react(const events::internal::Gap& ev) override;
void react(const events::internal::A2dp& ev) override;
void react(const events::internal::Avrc& ev) override;
using BluetoothState::react;
private:
uint8_t transaction_num_;
mac_addr_t connected_to_;
};
} // namespace bluetooth
} // namespace drivers
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