48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
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#pragma once
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#include <cstdint>
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#include <memory>
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#include <optional>
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#include <vector>
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// Frames often consist of:
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// - seq id // incremental sequential id, gaps in ids can be used to detect loss
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// - or timestamp
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// - data // the frame data
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// eg:
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//struct ExampleFrame {
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//int64_t seq_id {0};
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//std::vector<uint8_t> data;
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//};
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template<typename FrameType>
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struct FrameStream2I {
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virtual ~FrameStream2I(void) {}
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// get number of available frames
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// returns -1 if unknown
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[[nodiscard]] virtual int32_t size(void) = 0;
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// get next frame
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// data sharing? -> no, data is copied for each fsr, if concurency supported
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[[nodiscard]] virtual std::optional<FrameType> pop(void) = 0;
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// returns true if there are readers (or we dont know)
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virtual bool push(const FrameType& value) = 0;
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};
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template<typename FrameType>
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struct FrameStream2SourceI {
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virtual ~FrameStream2SourceI(void) {}
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[[nodiscard]] virtual std::shared_ptr<FrameStream2I<FrameType>> subscribe(void) = 0;
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virtual bool unsubscribe(const std::shared_ptr<FrameStream2I<FrameType>>& sub) = 0;
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};
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template<typename FrameType>
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struct FrameStream2SinkI {
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virtual ~FrameStream2SinkI(void) {}
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[[nodiscard]] virtual std::shared_ptr<FrameStream2I<FrameType>> subscribe(void) = 0;
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virtual bool unsubscribe(const std::shared_ptr<FrameStream2I<FrameType>>& sub) = 0;
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};
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