mediaiosink.h

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#pragma once
 
 
#include <promeki/config.h>
#if PROMEKI_ENABLE_PROAV
#include <promeki/namespace.h>
#include <promeki/error.h>
#include <promeki/frame.h>
#include <promeki/framecount.h>
#include <promeki/mediadesc.h>
#include <promeki/audiodesc.h>
#include <promeki/metadata.h>
#include <promeki/mediaioport.h>
 
PROMEKI_NAMESPACE_BEGIN
 
class MediaIO;
class MediaIOPortGroup;
class MediaIORequest;
 
class MediaIOSink : public MediaIOPort {
                PROMEKI_OBJECT(MediaIOSink, MediaIOPort)
        public:
                MediaIOSink(MediaIOPortGroup *group, int index, const String &name = String());
 
                ~MediaIOSink() override;
 
                Role role() const override { return MediaIOPort::Sink; }
 
                // ---- Pre-open input expectations ----
 
                Error setExpectedDesc(const MediaDesc &desc);
 
                const MediaDesc &expectedDesc() const { return _expectedMediaDesc; }
 
                Error setExpectedAudioDesc(const AudioDesc &desc);
 
                const AudioDesc &expectedAudioDesc() const { return _expectedAudioDesc; }
 
                Error setExpectedMetadata(const Metadata &meta);
 
                const Metadata &expectedMetadata() const { return _expectedMetadata; }
 
                Error proposeInput(const MediaDesc &offered, MediaDesc *preferred) const;
 
                // ---- Write API ----
 
                int writeDepth() const { return _writeDepth; }
 
                void setWriteDepth(int n);
 
                int pendingWrites() const;
 
                int writesAccepted() const;
 
                MediaIORequest writeFrame(const Frame &frame);
 
                // ---- Signals ----
 
                PROMEKI_SIGNAL(frameWanted);
 
                PROMEKI_SIGNAL(writeError, Error);
 
        private:
                int        _writeDepth = 4;
                FrameCount _writeFrameCount;
                MediaDesc  _expectedMediaDesc;
                AudioDesc  _expectedAudioDesc;
                Metadata   _expectedMetadata;
};
 
PROMEKI_NAMESPACE_END
 
#endif // PROMEKI_ENABLE_PROAV