mediapipelinetrigger.h

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#pragma once
 
 
#include <promeki/config.h>
#if PROMEKI_ENABLE_PROAV
#include <functional>
#include <memory>
 
#include <promeki/function.h>
#include <promeki/error.h>
#include <promeki/frame.h>
#include <promeki/namespace.h>
#include <promeki/result.h>
#include <promeki/string.h>
#include <promeki/uniqueptr.h>
#include <promeki/variantquery.h>
 
PROMEKI_NAMESPACE_BEGIN
 
class MediaPipelineTrigger {
        public:
                using UPtr = ::promeki::UniquePtr<MediaPipelineTrigger>;
 
                virtual ~MediaPipelineTrigger() = default;
 
                virtual bool match(const Frame &frame) = 0;
};
 
class MediaPipelineFunctionTrigger : public MediaPipelineTrigger {
        public:
                using Predicate = Function<bool(const Frame &)>;
 
                explicit MediaPipelineFunctionTrigger(Predicate fn) : _fn(std::move(fn)) {}
 
                bool match(const Frame &frame) override {
                        return _fn ? _fn(frame) : false;
                }
 
        private:
                Predicate _fn;
};
 
class MediaPipelineQueryTrigger : public MediaPipelineTrigger {
        public:
                static Result<MediaPipelineTrigger::UPtr> parse(const String &expr);
 
                explicit MediaPipelineQueryTrigger(VariantQuery<Frame> query) : _query(std::move(query)) {}
 
                bool match(const Frame &frame) override {
                        return _query.isValid() && _query.match(frame);
                }
 
                const String &source() const { return _query.source(); }
 
        private:
                VariantQuery<Frame> _query;
};
 
PROMEKI_NAMESPACE_END
 
#endif // PROMEKI_ENABLE_PROAV