Module dsi_bitstream::codes::params
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Mechanisms for selecting parameters.
Traits and structures in this file are of no interest for the standard
user. Their purpose is to provide a systematic way, and in particular
a default way, to select parameters for parameterized traits
such as GammaReadParam and GammaWriteParam.
The traits and structure in this module work closely with the
bitstream readers and writers in impls, which have an
additional type parameter RP/WP that must
implement marker traits ReadParams or WriteParams, respectively.
The type is then used as a selector type to provide blanket implementations
of parameterless traits in codes such as GammaRead,
GammaWrite, DeltaRead, DeltaWrite, and so on.
This module provides default selector types DefaultReadParams and DefaultWriteParams
which are also the default value for the parameter RP/WP in the bitstream
readers and writers in crate::impls. Type-selected blanket implementations
of all parameterless traits in crate::codes are provided for the bitstream
readers and writers in impls. Thus, if you not specify a value for the
parameter RP/WP, you will obtain automatically
the blanket implementations for parameterless traits contained in this module.
However, you can also create new selector types implementing ReadParams/WriteParams and
write blanket implementations for the bitstream readers and writers in crate::impls
where RP/WP is set to your selector types. Then, by specifying your type as value of the
parameter RP/WP when creating such readers and writers you will use
automatically your blanket implementations instead of the ones provided by this module.
Structs§
- A selector type for read parameters providing reasonable defaults.
- A selector type for write parameters providing reasonable defaults.
Traits§
- Marker trait for read-parameters selector types.
- Marker trait for write-parameters selector types.