srcmediaio.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/audiodesc.h>
#include <promeki/list.h>
 
PROMEKI_NAMESPACE_BEGIN
 
class SrcMediaIO : public SharedThreadMediaIO {
                PROMEKI_OBJECT(SrcMediaIO, SharedThreadMediaIO)
        public:
                static inline const MediaIOStats::ID StatsFramesConverted{"FramesConverted"};
 
                SrcMediaIO(ObjectBase *parent = nullptr);
                ~SrcMediaIO() override;
 
                Error describe(MediaIODescription *out) const 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 convertFrame(const Frame &input, Frame &output);
 
                AudioFormat::ID _outputAudioDataType = AudioFormat::Invalid;
                bool            _outputAudioDataTypeSet = false;
                int             _capacity = 4;
 
                Frame::List _outputQueue;
                FrameCount       _frameCount{0};
                int64_t          _readCount = 0;
                FrameCount       _framesConverted{0};
                bool             _capacityWarned = false;
};
 
class SrcFactory : public MediaIOFactory {
        public:
                SrcFactory() = default;
 
                String name() const override { return String("SRC"); }
                String displayName() const override { return String("Sample Rate Converter"); }
                String description() const override { return String("Audio sample format converter"); }
                bool   canBeTransform() const override { return true; }
 
                Config::SpecMap configSpecs() const override;
                bool            bridge(const MediaDesc &from, const MediaDesc &to, Config *outConfig,
                                       int *outCost) const override;
                MediaIO        *create(const Config &config, ObjectBase *parent = nullptr) const override;
};
 
PROMEKI_NAMESPACE_END
 
#endif // PROMEKI_ENABLE_PROAV