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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include "common/common_types.h"
#include "common/fixed_point.h"
namespace AudioCore::Renderer {
/**
* Upsampling state used by the AudioRenderer across calls.
*/
struct UpsamplerState {
static constexpr u16 HistorySize = 20;
/// Source data to target data ratio. E.g 48'000/32'000 = 1.5
Common::FixedPoint<16, 16> ratio;
/// Sample history
std::array<Common::FixedPoint<24, 8>, HistorySize> history;
/// Size of the sinc coefficient window
u16 window_size;
/// Read index for the history
u16 history_output_index;
/// Write index for the history
u16 history_input_index;
/// Start offset within the history, fixed to 0
u16 history_start_index;
/// Ebd offset within the history, fixed to HistorySize
u16 history_end_index;
/// Is this state initialized?
bool initialized;
/// Index of the current sample.
/// E.g 16K -> 48K has a ratio of 3, so this will be 0-2.
/// See the Upsample command in the AudioRenderer for more information.
u8 sample_index;
};
} // namespace AudioCore::Renderer
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