adtf::mediadescription::md_sample_data< T > Class Template Reference

#include <md_sample_data.h>

Detailed Description

template<typename T>
class adtf::mediadescription::md_sample_data< T >

Template to provide media description based access sample data.

The adtf_mdgen will generate specializations of this template that provide access methods for all members of the given struct.

Template Parameters

T	The type af the sample content.

Example Usage

test_struct.description:

<structs>
  <struct name="tChild" alignment="4" version="1">
    <element name="nA" type="tUInt32" arraysize="1">
      <deserialized alignment="4"/>
      <serialized bytepos="0" byteorder="LE"/>
    </element>
    <element name="nB" type="tUInt32" arraysize="1">
      <deserialized alignment="4"/>
      <serialized bytepos="4" byteorder="LE"/>
    </element>
  </struct>
  <struct name="tTest" alignment="4" version="1">
    <element name="nValue" type="tUInt32" arraysize="1">
      <deserialized alignment="4"/>
      <serialized bytepos="0" byteorder="LE"/>
    </element>
    <element name="aArray" type="tUInt32" arraysize="2">
      <deserialized alignment="4"/>
      <serialized bytepos="4" byteorder="LE"/>
    </element>
    <element name="sChild" type="tChild" arraysize="1">
      <deserialized alignment="4"/>
      <serialized bytepos="12" byteorder="LE"/>
    </element>
    <element name="aChildren" type="tChild" arraysize="2">
      <deserialized alignment="4"/>
      <serialized bytepos="20" byteorder="LE"/>
    </element>
  </struct>  
</structs>

#include <adtffiltersdk/adtf_filtersdk.h>
 
// include the generated header
#include <test_struct.h>
 
class cMyFilter: public adtf::filter::cFilter
{
    public:
        ADTF_CLASS_ID_NAME(cMyFilter, "my_filter.filter.example.cid", "My Filter");
 
        cMyFilter()
        {
            CreateInputPin("input", adtf::mediadescription::description<tTest>());
        }
 
        tResult AcceptType(adtf::streaming::ISampleReader* /*pReader*/,
                           const adtf::ucom::iobject_ptr<const adtf::streaming::IStreamType>& pType) override
        {
            m_oSampleDataFactory = adtf::mediadescription::md_sample_data_factory<tTest>(pType);
            RETURN_NOERROR;
        }
 
        tResult ProcessInput(adtf::streaming::ISampleReader* /*pReader*/,
                             const adtf::ucom::iobject_ptr<const adtf::streaming::ISample>& pSample) override
        {
            auto oSampleData = m_oSampleDataFactory.Make(pSample);
 
            LOG_INFO("received a sample:\n"
                     "  nValue = %u\n"
                     "  aArray[0] = %u\n"
                     "  sChild.nA = %u\n"
                     "  aChildren[0].nA = %u",
                     oSampleData.nValue(),
                     oSampleData.aArray()[0],
                     oSampleData.sChild().nA(),
                     oSampleData.aChildren()[0].nB());
 
            RETURN_NOERROR;
        }
 
    private:
        adtf::mediadescription::md_sample_data_factory<tTest> m_oSampleDataFactory;
};

---

The documentation for this class was generated from the following file:

• src/libraries/mediadescription/include/adtfmediadescription/md_sample_data.h