51 lines
1,002 B
C++
51 lines
1,002 B
C++
#include <psemek/audio/stereo.hpp>
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#include <vector>
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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 stereo_impl
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: stream
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{
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stereo_impl(stream_ptr left, stream_ptr right)
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: left_(std::move(left))
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, right_(std::move(right))
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{}
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std::size_t read(float * data, std::size_t sample_count) override
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{
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if (buffer_.size() < sample_count)
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buffer_.resize(sample_count);
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auto right_result = right_->read(data, sample_count);
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auto left_result = left_->read(buffer_.data(), sample_count);
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auto result = std::min(right_result, left_result);
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{
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auto begin = buffer_.data();
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auto end = buffer_.data() + result;
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auto dst = data;
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for (; begin < end; begin += 2, dst += 2)
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*dst = *begin;
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}
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return result;
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}
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private:
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stream_ptr left_, right_;
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std::vector<float> buffer_;
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};
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}
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stream_ptr stereo(stream_ptr left, stream_ptr right)
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{
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return std::make_shared<stereo_impl>(std::move(left), std::move(right));
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}
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}
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