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/*
* Copyright (c) 2022, kleines Filmröllchen <filmroellchen@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/DisjointChunks.h>
#include <AK/FixedArray.h>
#include <AK/Noncopyable.h>
#include <AK/Vector.h>
#include <LibAudio/Sample.h>
#include <LibThreading/Mutex.h>
namespace Audio {
// A sample queue providing synchronized access to efficiently-stored segmented user-provided audio data.
class UserSampleQueue {
AK_MAKE_NONCOPYABLE(UserSampleQueue);
AK_MAKE_NONMOVABLE(UserSampleQueue);
public:
UserSampleQueue() = default;
void append(FixedArray<Sample>&& samples);
void clear();
// Slice off some amount of samples from the beginning.
void discard_samples(size_t count);
Sample operator[](size_t index);
// The number of samples in the span.
size_t size();
bool is_empty();
size_t remaining_samples();
private:
// Re-initialize the spans after a vector resize.
void fix_spans();
Threading::Mutex m_sample_mutex;
// Sample data view to keep track of what to play next.
DisjointSpans<Sample> m_enqueued_samples;
// The number of samples that were played from the backing store since last discarding its start.
size_t m_samples_to_discard { 0 };
// The backing store for the enqueued sample view.
DisjointChunks<Sample, FixedArray<Sample>> m_backing_samples {};
};
}
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