60 lines
1.2 KiB
C++
60 lines
1.2 KiB
C++
#include <psemek/audio/duplicate.hpp>
|
|
#include <psemek/audio/recorder.hpp>
|
|
|
|
#include <atomic>
|
|
|
|
namespace psemek::audio
|
|
{
|
|
|
|
namespace
|
|
{
|
|
|
|
struct duplicate_impl
|
|
: stream
|
|
{
|
|
duplicate_impl(std::shared_ptr<audio::recorder> recorder)
|
|
: recorder_(std::move(recorder))
|
|
{}
|
|
|
|
std::optional<std::size_t> length() const override
|
|
{
|
|
return recorder_->stream()->length();
|
|
}
|
|
|
|
std::size_t played() const override
|
|
{
|
|
return played_.load();
|
|
}
|
|
|
|
std::size_t read(float * data, std::size_t sample_count) override
|
|
{
|
|
auto buffer = recorder_->buffer();
|
|
auto played = played_.load();
|
|
if (buffer.size() < played + sample_count)
|
|
{
|
|
recorder_->request(sample_count);
|
|
buffer = recorder_->buffer();
|
|
}
|
|
|
|
auto count = std::min<std::size_t>(sample_count, buffer.size() - played);
|
|
std::copy(buffer.data() + played, buffer.data() + played + count, data);
|
|
played_.fetch_add(count);
|
|
return count;
|
|
}
|
|
|
|
private:
|
|
std::shared_ptr<recorder> recorder_;
|
|
std::atomic<std::size_t> played_{0};
|
|
};
|
|
|
|
}
|
|
|
|
duplicator make_duplicator(stream_ptr stream)
|
|
{
|
|
auto recorder = make_recorder(std::move(stream));
|
|
return [recorder]{
|
|
return std::make_shared<duplicate_impl>(recorder);
|
|
};
|
|
}
|
|
|
|
}
|