77 lines
1.5 KiB
C++
77 lines
1.5 KiB
C++
#include <psemek/audio/combine/duplicate.hpp>
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#include <atomic>
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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 duplicate_stream_impl
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: stream
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{
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duplicate_stream_impl(std::shared_ptr<recorder> recorder)
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: recorder_(std::move(recorder))
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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 recorder_->length();
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}
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std::size_t played() const override
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{
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return played_.load();
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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 buffer = recorder_->buffer();
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auto played = played_.load();
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if (buffer.size() < played + samples.size())
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{
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recorder_->request(samples.size());
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buffer = recorder_->buffer();
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}
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auto count = std::min<std::size_t>(samples.size(), buffer.size() - played);
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std::copy(buffer.data() + played, buffer.data() + played + count, samples.begin());
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played_.fetch_add(count);
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return count;
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}
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private:
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std::shared_ptr<recorder> recorder_;
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std::atomic<std::size_t> played_{0};
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};
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struct duplicate_track_impl
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: track
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{
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duplicate_track_impl(std::shared_ptr<recorder> recorder)
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: recorder_(std::move(recorder))
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{}
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stream_ptr stream() const override
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{
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return std::make_shared<duplicate_stream_impl>(recorder_);
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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 recorder_->length();
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}
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private:
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std::shared_ptr<recorder> recorder_;
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};
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}
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track_ptr make_duplicator(std::shared_ptr<recorder> recorder)
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{
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return std::make_shared<duplicate_track_impl>(std::move(recorder));
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}
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}
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