burnmediaio.h

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#pragma once
 
 
#include <promeki/config.h>
#if PROMEKI_ENABLE_PROAV
#include <promeki/namespace.h>
#include <promeki/sharedthreadmediaio.h>
#include <promeki/mediaiofactory.h>
#include <promeki/videotestpattern.h>
#include <promeki/list.h>
#include <promeki/string.h>
 
PROMEKI_NAMESPACE_BEGIN
 
class BurnMediaIO : public SharedThreadMediaIO {
                PROMEKI_OBJECT(BurnMediaIO, SharedThreadMediaIO)
        public:
                static inline const MediaIOStats::ID StatsFramesBurned{"FramesBurned"};
 
                BurnMediaIO(ObjectBase *parent = nullptr);
                ~BurnMediaIO() override;
 
                Error proposeInput(const MediaDesc &offered, MediaDesc *preferred) const override;
                Error proposeOutput(const MediaDesc &requested, MediaDesc *achievable,
                                    MediaConfig *configDelta = nullptr) const override;
                int   pendingInternalWrites() const override;
 
        protected:
                Error executeCmd(MediaIOCommandOpen &cmd) override;
                Error executeCmd(MediaIOCommandClose &cmd) override;
                Error executeCmd(MediaIOCommandRead &cmd) override;
                Error executeCmd(MediaIOCommandWrite &cmd) override;
                Error executeCmd(MediaIOCommandStats &cmd) override;
 
        private:
                Error burnFrame(const Frame &input, Frame &output);
 
                VideoTestPattern _pattern;
                String           _burnTextTemplate;
                bool             _burnEnabled = false;
                int              _capacity = 4;
 
                Frame::List _outputQueue;
                FrameCount       _frameCount{0};
                int64_t          _readCount = 0;
                FrameCount       _framesBurned{0};
                bool             _capacityWarned = false;
                bool             _notPaintableWarned = false;
};
 
class BurnFactory : public MediaIOFactory {
        public:
                BurnFactory() = default;
 
                String name() const override { return String("Burn"); }
                String displayName() const override { return String("Burn-in (Timecode / Text)"); }
                String description() const override { return String("Text burn-in overlay on video frames"); }
                bool   canBeTransform() const override { return true; }
 
                Config::SpecMap configSpecs() const override;
                MediaIO        *create(const Config &config, ObjectBase *parent = nullptr) const override;
};
 
PROMEKI_NAMESPACE_END
 
#endif // PROMEKI_ENABLE_PROAV