60 lines
1.2 KiB
C++
60 lines
1.2 KiB
C++
#include <psemek/audio/duplicate.hpp>
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#include <psemek/audio/recorder.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_impl
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: stream
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{
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duplicate_impl(std::shared_ptr<audio::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(float * data, std::size_t sample_count) 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 + sample_count)
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{
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recorder_->request(sample_count);
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buffer = recorder_->buffer();
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}
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auto count = std::min<std::size_t>(sample_count, buffer.size() - played);
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std::copy(buffer.data() + played, buffer.data() + played + count, data);
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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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}
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duplicator make_duplicator(stream_ptr stream)
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{
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auto recorder = make_recorder(std::move(stream));
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return [recorder]{
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return std::make_shared<duplicate_impl>(recorder);
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};
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}
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}
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