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CLK/Analyser/Dynamic/MultiMachine/Implementation/MultiSpeaker.hpp

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//
// MultiSpeaker.hpp
// Clock Signal
//
// Created by Thomas Harte on 18/02/2018.
// Copyright 2018 Thomas Harte. All rights reserved.
//
#ifndef MultiSpeaker_hpp
#define MultiSpeaker_hpp
#include "../../../../Machines/DynamicMachine.hpp"
#include "../../../../Outputs/Speaker/Speaker.hpp"
#include <memory>
#include <mutex>
#include <vector>
namespace Analyser {
namespace Dynamic {
/*!
Provides a class that multiplexes calls to and from Outputs::Speaker::Speaker in order
transparently to connect a single caller to multiple destinations.
Makes a static internal copy of the list of machines; expects the owner to keep it
abreast of the current frontmost machine.
*/
class MultiSpeaker: public Outputs::Speaker::Speaker, Outputs::Speaker::Speaker::Delegate {
public:
/*!
Provides a construction mechanism that may return nullptr, in the case that all included
machines return nullptr as their speaker.
*/
static MultiSpeaker *create(const std::vector<std::unique_ptr<::Machine::DynamicMachine>> &machines);
/// This class requires the caller to nominate changes in the frontmost machine.
void set_new_front_machine(::Machine::DynamicMachine *machine);
// Below is the standard Outputs::Speaker::Speaker interface; see there for documentation.
float get_ideal_clock_rate_in_range(float minimum, float maximum) override;
void set_computed_output_rate(float cycles_per_second, int buffer_size, bool stereo) override;
bool get_is_stereo() override;
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void set_output_volume(float) override;
private:
void speaker_did_complete_samples(Speaker *speaker, const std::vector<int16_t> &buffer) final;
void speaker_did_change_input_clock(Speaker *speaker) final;
MultiSpeaker(const std::vector<Outputs::Speaker::Speaker *> &speakers);
std::vector<Outputs::Speaker::Speaker *> speakers_;
Outputs::Speaker::Speaker *front_speaker_ = nullptr;
std::mutex front_speaker_mutex_;
bool stereo_output_ = false;
};
}
}
#endif /* MultiSpeaker_hpp */