mirror of https://github.com/yuzu-mirror/yuzu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
// Copyright 2018 yuzu Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <array>
|
|
#include <vector>
|
|
|
|
#include "common/common_types.h"
|
|
|
|
namespace AudioCore {
|
|
|
|
struct InterpolationState {
|
|
static constexpr std::size_t taps{4};
|
|
static constexpr std::size_t history_size{taps * 2 - 1};
|
|
std::array<std::array<s16, 2>, history_size> history{};
|
|
double position{};
|
|
s32 fraction{};
|
|
};
|
|
|
|
/// Interpolates input signal to produce output signal.
|
|
/// @param input The signal to interpolate.
|
|
/// @param ratio Interpolation ratio.
|
|
/// ratio > 1.0 results in fewer output samples.
|
|
/// ratio < 1.0 results in more output samples.
|
|
/// @returns Output signal.
|
|
std::vector<s16> Interpolate(InterpolationState& state, std::vector<s16> input, double ratio);
|
|
|
|
/// Interpolates input signal to produce output signal.
|
|
/// @param input The signal to interpolate.
|
|
/// @param input_rate The sample rate of input.
|
|
/// @param output_rate The desired sample rate of the output.
|
|
/// @returns Output signal.
|
|
inline std::vector<s16> Interpolate(InterpolationState& state, std::vector<s16> input,
|
|
u32 input_rate, u32 output_rate) {
|
|
const double ratio = static_cast<double>(input_rate) / static_cast<double>(output_rate);
|
|
return Interpolate(state, std::move(input), ratio);
|
|
}
|
|
|
|
/// Nintendo Switchs DSP resampling algorithm. Based on a single channel
|
|
void Resample(s32* output, const s32* input, s32 pitch, s32& fraction, std::size_t sample_count);
|
|
|
|
} // namespace AudioCore
|