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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>
51 lines
1.8 KiB
C++
51 lines
1.8 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 "Endpoint.hpp"
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#include "Stream.hpp"
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#include "transcode/Transform.hpp"
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#include "transcode/InputTranscodeProxy.hpp"
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#include <initializer_list>
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#include <optional>
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#include <memory>
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namespace audio
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{
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class StreamFactory
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{
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public:
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StreamFactory() = default;
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explicit StreamFactory(std::chrono::milliseconds operationPeriodRequirement);
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auto makeStream(Source &source, Sink &sink) -> std::unique_ptr<AbstractStream>;
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auto makeStream(Source &source, Sink &sink, AudioFormat streamFormat) -> std::unique_ptr<Stream>;
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auto makeInputTranscodingStream(Source &source,
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Sink &sink,
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AudioFormat streamFormat,
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std::shared_ptr<transcode::Transform>(transform))
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-> std::unique_ptr<transcode::InputTranscodeProxy>;
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private:
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using Traits = audio::Endpoint::Traits;
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static constexpr auto defaultBuffering = 2U;
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auto makeStream(Traits sourceTraits, Traits sinkTraits, AudioFormat streamFormat) -> std::unique_ptr<Stream>;
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auto getBlockSizeConstraint(std::initializer_list<Traits> traitsList) const -> std::optional<std::size_t>;
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auto getTimingConstraints(std::initializer_list<std::optional<std::chrono::milliseconds>> timingConstraints)
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const -> std::chrono::milliseconds;
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auto negotiateAllocator(std::initializer_list<Traits> traitsList) noexcept -> Stream::Allocator &;
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std::optional<std::chrono::milliseconds> periodRequirement = std::nullopt;
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StandardStreamAllocator stdAlloc;
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NonCacheableStreamAllocator nonCacheableAlloc;
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};
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} // namespace audio
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