audio_device.hpp

// Copyright Take Vos 2019-2020.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "../bigint.hpp"
#include "audio_device_delegate.hpp"
#include "audio_stream_config.hpp"
#include "audio_channel.hpp"
#include "audio_direction.hpp"
#include "speaker_mapping.hpp"
#include "audio_device_id.hpp"
#include "../label.hpp"
#include "../enum_metadata.hpp"
#include <string>
#include <memory>
#include <ostream>
 
namespace hi::inline v1 {
 
enum class audio_device_state { active, disabled, not_present, unplugged };
 
// clang-format off
constexpr auto audio_device_state_metadata = enum_metadata{
    audio_device_state::active, "active",
    audio_device_state::disabled, "disabled",
    audio_device_state::not_present, "not_present",
    audio_device_state::unplugged, "unplugged",
};
// clang-format on
 
 
[[nodiscard]] inline std::string_view to_string(audio_device_state const &rhs) noexcept
{
    return audio_device_state_metadata[rhs];
}
 
inline std::ostream &operator<<(std::ostream &lhs, audio_device_state const &rhs)
{
    return lhs << audio_device_state_metadata[rhs];
}
 
class audio_device {
public:
    audio_device() noexcept = default;
    virtual ~audio_device() = default;
 
    audio_device_id id;
 
    [[nodiscard]] virtual std::string name() const noexcept = 0;
 
    [[nodiscard]] virtual label label() const noexcept = 0;
 
    [[nodiscard]] virtual audio_device_state state() const noexcept = 0;
 
    [[nodiscard]] virtual audio_direction direction() const noexcept = 0;
 
    [[nodiscard]] virtual bool exclusive() const noexcept = 0;
 
    virtual void set_exclusive(bool exclusive) noexcept = 0;
 
    [[nodiscard]] virtual double sample_rate() const noexcept = 0;
 
    virtual void set_sample_rate(double sample_rate) noexcept = 0;
 
    [[nodiscard]] virtual hi::speaker_mapping input_speaker_mapping() const noexcept = 0;
 
    virtual void set_input_speaker_mapping(hi::speaker_mapping speaker_mapping) noexcept = 0;
 
    [[nodiscard]] virtual std::vector<hi::speaker_mapping> available_input_speaker_mappings() const noexcept = 0;
 
    [[nodiscard]] virtual hi::speaker_mapping output_speaker_mapping() const noexcept = 0;
 
    virtual void set_output_speaker_mapping(hi::speaker_mapping speaker_mapping) noexcept = 0;
 
    [[nodiscard]] virtual std::vector<hi::speaker_mapping> available_output_speaker_mappings() const noexcept = 0;
 
    // virtual void start_stream(std::string id, std::string name) = 0;
 
    // virtual void stop_stream() noexcept = 0;
 
private:
    std::shared_ptr<audio_device_delegate> delegate = {};
};
 
} // namespace hi::inline v1
 
 
template<typename CharT>
struct std::formatter<hi::audio_device_state, CharT> : std::formatter<char const *, CharT> {
    auto format(hi::audio_device_state const &t, auto &fc)
    {
        return std::formatter<char const *, CharT>::format(hi::to_const_string(t), fc);
    }
};