<put algortithm description here>
Input layer
[raster]Search distance
[number]<put parameter description here>
Default: 100
Smooth iterations
[number]<put parameter description here>
Default: 0
Band to operate on
[number]<put parameter description here>
Default: 1
Validity mask
[raster]Optional.
<put parameter description here>
Do not use default validity mask
[boolean]<put parameter description here>
Default: False
Output layer
[raster]processing.runalg('gdalogr:fillnodata', input, distance, iterations, band, mask, no_default_mask, output)