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ece6a51e5b
Add voice transcoding during phone call with two basic transforms: - sample rate downscaling by a factor of 2 with a decimator - sample rate upscaling by a factor of 2 with an interpolator (no low-pass filter) Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>
44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
// Copyright (c) 2017-2021, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#pragma once
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#include <Audio/StreamProxy.hpp>
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#include "Transform.hpp"
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#include <memory>
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namespace audio::transcode
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{
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/**
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* @brief An input transcoding proxy for an AbstractStream.
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*/
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class InputTranscodeProxy : public audio::StreamProxy
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{
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public:
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/**
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* @brief Construct a new Input Transcode Proxy object
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*
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* @param wrappedStream
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* @param transform to apply on the input
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*/
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explicit InputTranscodeProxy(std::shared_ptr<AbstractStream> wrappedStream,
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std::shared_ptr<Transform> transform) noexcept;
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bool push(const Span &span) override;
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void commit() override;
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bool reserve(Span &span) override;
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[[nodiscard]] auto getInputTraits() const noexcept -> Traits override;
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private:
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std::shared_ptr<Transform> transform;
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Span reservedSpan;
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std::size_t transcodingSpaceSize;
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std::unique_ptr<std::uint8_t[]> transcodingSpace;
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Span transcodingSpaceSpan;
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bool isReserved = false;
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};
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}; // namespace audio::transcode
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