51 lines
988 B
C++
51 lines
988 B
C++
#include <psemek/audio/effect/truncate.hpp>
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#include <algorithm>
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namespace psemek::audio
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{
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namespace
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{
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struct truncate_impl
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: stream
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{
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truncate_impl(stream_ptr stream, duration length)
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: stream_(std::move(stream))
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, remaining_(length.samples())
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, total_length_(stream_->played() + remaining_)
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{}
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std::optional<std::size_t> length() const override
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{
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return total_length_;
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}
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std::size_t read(util::span<float> samples) override
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{
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auto const max_count = std::min<std::size_t>(remaining_, samples.size());
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auto const count = stream_->read(samples.prefix(max_count));
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remaining_ -= count;
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return count;
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}
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std::size_t played() const override
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{
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return stream_->played();
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}
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private:
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stream_ptr stream_;
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std::size_t remaining_;
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std::size_t total_length_;
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};
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}
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stream_ptr truncate(stream_ptr stream, duration length)
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{
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return std::make_shared<truncate_impl>(std::move(stream), length);
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}
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}
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