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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 "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 KnownDevices() -> std::vector<bluetooth::Device>;
auto SetPreferredDevice(const bluetooth::mac_addr_t& mac) -> void;
auto SetSource(StreamBufferHandle_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 {};
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
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<mac_addr_t>;
static auto preferred_device(const mac_addr_t&) -> 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::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 std::mutex sDevicesMutex_;
static std::map<mac_addr_t, Device> sDevices_;
static std::optional<mac_addr_t> sPreferredDevice_;
static mac_addr_t sCurrentDevice_;
static std::atomic<StreamBufferHandle_t> sSource_;
static std::function<void(Event)> sEventHandler_;
};
class Disabled : public BluetoothState {
public:
void entry() 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 {}
using BluetoothState::react;
};
class Scanning : public BluetoothState {
public:
void entry() override;
void exit() 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;
private:
auto OnDeviceDiscovered(esp_bt_gap_cb_param_t*) -> void;
};
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::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;
};
} // namespace bluetooth
} // namespace drivers
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