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47 lines
942 B
C++
47 lines
942 B
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#pragma once
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#include "Buffer.hxx"
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#include "RestBuffer.hxx"
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#include <cstdint>
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#include <span>
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/**
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* Pack DSD 1 bit samples into (padded) 24 bit PCM samples for
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* playback over USB, according to the DoP standard:
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* http://dsd-guide.com/dop-open-standard
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*/
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class DsdToDopConverter {
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unsigned channels;
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PcmBuffer buffer;
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PcmRestBuffer<std::byte, 4> rest_buffer;
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public:
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void Open(unsigned _channels) noexcept;
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void Reset() noexcept {
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rest_buffer.Reset();
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}
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/**
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* @return the size of one input block in bytes
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*/
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size_t GetInputBlockSize() const noexcept {
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return rest_buffer.GetInputBlockSize();
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}
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/**
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* @return the size of one output block in bytes
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*/
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size_t GetOutputBlockSize() const noexcept {
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return 2 * GetInputBlockSize();
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}
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std::span<const uint32_t> Convert(std::span<const std::byte> src) noexcept;
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};
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