47 lines
982 B
C++
47 lines
982 B
C++
// SPDX-License-Identifier: LGPL-2.1
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// Copyright The Music Player Daemon Project
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// Based on AudioCompress (c)2007 busybee (http://beesbuzz.biz/
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#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <span>
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class PcmNormalizer {
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///! Target level (on a scale of 0-32767)
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static constexpr int target = 16384;
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//! The maximum amount to amplify by
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static constexpr int maxgain = 32;
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//! How much inertia ramping has
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static constexpr int smooth = 8;
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//! History of the peak values
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int *const peaks;
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int prev_gain = 0;
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std::size_t pos = 0;
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const std::size_t bufsz;
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public:
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PcmNormalizer(std::size_t history=400) noexcept
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:peaks(new int[history]{}),
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bufsz(history)
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{
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}
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~PcmNormalizer() noexcept {
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delete[] peaks;
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}
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void Reset() noexcept;
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//! Process 16-bit signed data
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void ProcessS16(int16_t *dest, std::span<const int16_t> src) noexcept;
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};
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//! TODO: Compressor_Process_int32, Compressor_Process_float, others as needed
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