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/*
* Copyright (c) 2021, kleines Filmröllchen <filmroellchen@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "Clip.h"
#include "Music.h"
#include "Processor.h"
#include <LibCore/Object.h>
namespace LibDSP {
// A track is also known as a channel and serves as a container for the audio pipeline: clips -> processors -> mixing & output
class Track : public Core::Object {
C_OBJECT_ABSTRACT(Track)
public:
Track(NonnullRefPtr<Transport> transport)
: m_transport(move(transport))
{
}
virtual ~Track() override = default;
virtual bool check_processor_chain_valid() const = 0;
bool add_processor(NonnullRefPtr<Processor> new_processor);
// Creates the current signal of the track by processing current note or audio data through the processing chain
Sample current_signal();
NonnullRefPtrVector<Processor> const& processor_chain() const { return m_processor_chain; }
NonnullRefPtr<Transport> const transport() const { return m_transport; }
protected:
bool check_processor_chain_valid_with_initial_type(SignalType initial_type) const;
// Subclasses override to provide the base signal to the processing chain
virtual void compute_current_clips_signal() = 0;
NonnullRefPtrVector<Processor> m_processor_chain;
NonnullRefPtr<Transport> m_transport;
// The current signal is stored here, to prevent unnecessary reallocation.
Signal m_current_signal { Audio::Sample {} };
};
class NoteTrack final : public Track {
public:
virtual ~NoteTrack() override = default;
bool check_processor_chain_valid() const override;
NonnullRefPtrVector<NoteClip> const& clips() const { return m_clips; }
protected:
void compute_current_clips_signal() override;
private:
NonnullRefPtrVector<NoteClip> m_clips;
};
class AudioTrack final : public Track {
public:
virtual ~AudioTrack() override = default;
bool check_processor_chain_valid() const override;
NonnullRefPtrVector<AudioClip> const& clips() const { return m_clips; }
protected:
void compute_current_clips_signal() override;
private:
NonnullRefPtrVector<AudioClip> m_clips;
};
}
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