codec_sample_streamer.h

Go to the documentation of this file.

 
#pragma once
#include "sample_codec.h"
#include "media_description_type.h"
 
#ifdef USE_ADTF_MEDIA_DESCRIPTION_LEGACY
    #ifndef NO_ADTF_MEDIA_DESCRIPTION_LEGACY
        #include "legacy/codec_sample_streamer_legacy.h"
    #endif
#endif
 
#include <functional>
 
namespace adtf
{
namespace mediadescription
{
namespace osborn
{
template<typename ReaderImplementation = streaming::flash::cDynamicSampleReader>
class decoding_sample_reader :
    public ReaderImplementation,
    public cSampleCodecFactory
{
public:
    decoding_sample_reader()
    {
        ReaderImplementation::SetAcceptTypeCallback([&](const ucom::ant::iobject_ptr<const streaming::ant::IStreamType>& pStreamType) -> tResult {
            static_cast<cSampleCodecFactory&>(*this) = cSampleCodecFactory();
            RETURN_IF_FAILED(get_codec_factory_from_stream_type(*pStreamType.Get(), *this));
 
            if (m_fnAcceptCallback)
            {
                RETURN_IF_FAILED(m_fnAcceptCallback(pStreamType));
            }
            RETURN_NOERROR;
        });
    }
 
    tResult SetType(const ucom::ant::iobject_ptr<const streaming::ant::IStreamType>& pStreamType) override
    {
        RETURN_IF_FAILED(ReaderImplementation::SetType(pStreamType));
        // the initial type is not required to have a media description set
        static_cast<cSampleCodecFactory&>(*this) = cSampleCodecFactory();
        if (pStreamType.Get())
        {
            get_codec_factory_from_stream_type(*pStreamType.Get(), *this);
        }
        RETURN_NOERROR;
    }
 
    void SetAcceptTypeCallback(const std::function<tResult(const ucom::ant::iobject_ptr<const streaming::ant::IStreamType>& pStreamType)>& fnAcceptTypeCallback)
    {
        m_fnAcceptCallback = fnAcceptTypeCallback;
    }
 
    bool GetNextDecoder(cSampleDecoder& oDecoder)
    {
        base::flash::tNanoSeconds tmSampleTime;
        return GetNextDecoder(oDecoder, tmSampleTime);
    }
 
    bool GetNextDecoder(cSampleDecoder& oDecoder, base::flash::tNanoSeconds& tmSampleTime)
    {
        ucom::object_ptr<const streaming::ISample> pSample;
        auto oResult = ReaderImplementation::GetNextSample(pSample);
        if (IS_FAILED(oResult))
        {
            if (oResult == ERR_EMPTY)
            {
                return false;
            }
            THROW_IF_FAILED(oResult);
        }
 
        oDecoder = MakeDecoderFor(pSample);
        THROW_IF_FAILED(oDecoder.IsValid());
        tmSampleTime = streaming::get_sample_time(pSample);
        return true;
    }
 
    bool GetLastDecoder(cSampleDecoder& oDecoder)
    {
        base::flash::tNanoSeconds tmSampleTime;
        return GetLastDecoder(oDecoder, tmSampleTime);
    }
 
    bool GetLastDecoder(cSampleDecoder& oDecoder, base::flash::tNanoSeconds& tmSampleTime)
    {
        ucom::object_ptr<const streaming::ISample> pSample;
        auto oResult = ReaderImplementation::GetLastSample(pSample);
        if (IS_FAILED(oResult))
        {
            if (oResult == ERR_EMPTY)
            {
                return false;
            }
            THROW_IF_FAILED(oResult);
        }
 
        oDecoder = MakeDecoderFor(pSample);
        THROW_IF_FAILED(oDecoder.IsValid());
        tmSampleTime = streaming::get_sample_time(pSample);
        return true;
    }
 
private:
    std::function<tResult(const ucom::ant::iobject_ptr<const streaming::ant::IStreamType>& pStreamType)> m_fnAcceptCallback;
};
 
class cSampleWithCodec : public cSampleCodec
{
public:
    cSampleWithCodec() = default;
 
    cSampleWithCodec(cSampleCodec&& oCodec,
                     const ucom::ant::iobject_ptr<const streaming::ant::ISample>& pSample);
 
    cSampleWithCodec(cSampleWithCodec&&) = default;
    cSampleWithCodec& operator=(cSampleWithCodec&&) = default;
 
    virtual ~cSampleWithCodec();
 
    ucom::ant::object_ptr<const streaming::ant::ISample> Release();
 
private:
    ucom::ant::object_ptr<const streaming::ant::ISample> m_pSample;
};
 
template<typename WriterImplementation = streaming::flash::cSampleWriter>
class encoding_sample_writer :
    public WriterImplementation,
    public cSampleCodecFactory
{
public:
    cSampleWithCodec MakeSample(base::flash::tNanoSeconds tmTimeStamp)
    {
        ucom::object_ptr<streaming::ant::ISample> pSample;
        THROW_IF_FAILED(streaming::alloc_sample(pSample, tmTimeStamp));
        auto oCodec = MakeCodecFor(pSample);
        THROW_IF_FAILED(oCodec.IsValid());
        return cSampleWithCodec(std::move(oCodec), pSample);
    }
 
    tResult SetType(const ucom::ant::iobject_ptr<const streaming::ant::IStreamType>& pStreamType) override
    {
        RETURN_IF_FAILED(WriterImplementation::SetType(pStreamType));
        if (pStreamType.Get())
        {
            // the initial type is not required to have a media description set
            get_codec_factory_from_stream_type(*pStreamType.Get(), *this);
        }
        else
        {
            *static_cast<cSampleCodecFactory*>(this) = cSampleCodecFactory();
        }
        RETURN_NOERROR;
    }
 
    tResult ChangeType(const ucom::ant::iobject_ptr<const streaming::ant::IStreamType>& pStreamType) override
    {
        RETURN_IF_FAILED(WriterImplementation::ChangeType(pStreamType));
        // the initial type is not required to have a media description set
        get_codec_factory_from_stream_type(*pStreamType.Get(), *this);
        RETURN_NOERROR;
    }
 
    using WriterImplementation::Write;
 
    tResult Write(cSampleWithCodec& oSampleWithCodec)
    {
        return Write(oSampleWithCodec.Release());
    }
};
 
} // namespace osborn
 
using osborn::decoding_sample_reader;
using osborn::encoding_sample_writer;
 
} // namespace mediadescription
} // namespace adtf