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ADTF
3.16.0
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The ADTF Mediadescription Package brings the Data Definiton Language (DDL) and so the DDL Library into ADTF's scope.
The main header to include is:
To use ADTF in a common generic way we are providing tools and utilities for convenience access and generation to handle the Data Definition Language (DDL).
With this language you are able to describe the stuctured content of the data sent via by Sample Streams from one Filter to another (as well as using Streaming Services).
The package will provide a default ADTF Stream Meta Type and many functionality around that support utilities writing, reading and describing memory content (sample content) with the help of the DDL. Currently ADTF comes with 2 DDL Packages:
$(ADTF_DIR)/pkg/ddl). $(ADTF_DIR)/pkg/adtfddl)The ADTF Media Description SDK depends on the ADTF Streaming SDK and the Open Source DDL Library and the ADTF DDL SDK (Legacy Package).
adtf Namespace for entire ADTF SDK.
adtf::mediadescription ddl definition of the ddl namespace
ddl::dd definition of the dd namespace
ddl::codec Namespace for the new faster CodecFactory/Decoder/Codec implementation. see also The ADTF Codecs and CodecFactory
ddl::access_element from dev_essential stream_meta_type_default stream_type_default Generator template to create an instance of the stream_meta_type_default.
stream_type_default_array Generator template to create an instance of the stream_meta_type_default.
md_sample_data Template to provide media description based access to Sample data.
decoding_sample_reader This reader uses the media description to decode sample data.
encoding_sample_writer Sample Writer that provides samples that can be updated via a Codec.
cSampleCodecFactory Factory class for ddl codecs for samples. see also The ADTF Codecs and SampleCodecs
cStaticSampleDecoder Decoder for samples with static data content. see also The ADTF Codecs and SampleCodecs
cSampleDecoder Decoder for samples with static and/or dynamic data. see also The ADTF Codecs and SampleCodecs
cStaticSampleCodec Codec for samples with static data content. see also The ADTF Codecs and SampleCodecs
cSampleCodec Codec for samples with static and/or dynamic data. see also The ADTF Codecs and SampleCodecs
structure<T> This is used to create a structure type from an existing c++ struct definition. see Use structure class or section_ddl_file_structuregenerator_defining how to use it
enumeration<T> This is used to create an enumeration ytpe from an existing c++ enum. see Use structure class or section_ddl_file_structuregenerator_defining how to use it
ddl::DDStructure Utility class for a complete valid data definition of one StructType and its dependencies. see Use structure class how to use it
ddl::DDStructureGenerator Creating a valid Structure Data Definition by a existing type and its member types. see Use structure<> template how to use it
ddl::DDString Convenience class to load and validate a Data Definition xml string. see Define a huge string for DDL Description how to use it
ddl::DDFile Convenience class to load and validate a Data Definition form a xml file string. see Read the DDL file and setup Stream Type how to use it
ddl::CodecFactory - old codec API of dev_essential Factory class for ddl codecs. see also The ADTF Codecs and SampleCodecs
ddl::codec::CodecFactory - new codec API of dev_essential Within ADTF data are described via stream types as instance of stream meta types: ADTF standard stream types can be handled in a common way for visualizations and transformations in a generic ways.
For information on how to generate and use such DDL descriptions have a look at: