colisee / python-dabmot

Python API for DAB MOT applications as per ETSI EN 301 234.

python-mot

Python API for DAB MOT applications as per ETSI EN 301 234.

This is designed to be used in conjunction with the python-msc library and provide MOT objects for encoding and decoding to/from bitstreams.

Dependencies

Utilities

Examples

Creating an MOT object and adding parameters

from mot import MotObject, ContentType

# create MOT object
object = MotObject("TestObject", "\x00" * 1024, ContentType.IMAGE_JFIF)

# add additional parameter - mimetype and absolute expiration
object.add_parameter(MimeType("image/jpg"))
object.add_parameter(AbsoluteExpiration(datetime(2010, 8, 11, 12, 34, 11, 678000)))

Parameters

Parameters exist to cover the full set of core Header and Directory parameters. Other parameters may be used for encoding. In order to register them for decoding using the standard MOT object decoder, their values must be injected into the HeaderParameter object.

For example, for injecting parameter in the SPI specification, decode functions must be registered against their ParamId.

HeaderParameter.decoders[0x25] = ScopeStart.decode_data
HeaderParameter.decoders[0x26] = ScopeEnd.decode_data
HeaderParameter.decoders[0x27] = ScopeId.decode_data

The decode function should be a static method taking a single argument of a data bitarray from the Parameter body. For example, from ScopeId:

@staticmethod
def decode_data(data):
    return ScopeId(*decode_contentid(data))