#!/usr/bin/env python3
###############################################################################
# $Id: val_repl.py ae12632821c260963247432aff038b3b7244361d 2021-04-27 23:42:00 +0300 Idan Miara $
#
# Project:  GDAL Python samples
# Purpose:  Script to replace specified values from the input raster file
#           with the new ones. May be useful in cases when you don't like
#           value, used for NoData indication and want replace it with other
#           value. Input file remains unchanged, results stored in other file.
# Author:   Andrey Kiselev, dron@remotesensing.org
#
###############################################################################
# Copyright (c) 2003, Andrey Kiselev <dron@remotesensing.org>
# Copyright (c) 2009-2010, Even Rouault <even dot rouault at spatialys.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
###############################################################################


import sys
import numpy as np

from osgeo import gdal
gdal.TermProgress = gdal.TermProgress_nocb



# =============================================================================


def Usage():
    print('Usage: val_repl.py -innd in_nodata_value -outnd out_nodata_value')
    print('                   [-of out_format] [-ot out_type] infile outfile')
    print('')
    return 1


def ParseType(typ):
    gdal_dt = gdal.GetDataTypeByName(typ)
    if gdal_dt is gdal.GDT_Unknown:
        gdal_dt = gdal.GDT_Byte
    return gdal_dt


def main(argv):
    inNoData = None
    outNoData = None
    infile = None
    outfile = None
    driver_name = 'GTiff'
    typ = gdal.GDT_Byte

    # Parse command line arguments.
    i = 1
    while i < len(argv):
        arg = argv[i]

        if arg == '-innd':
            i = i + 1
            inNoData = float(argv[i])

        elif arg == '-outnd':
            i = i + 1
            outNoData = float(argv[i])

        elif arg == '-of':
            i = i + 1
            driver_name = argv[i]

        elif arg == '-ot':
            i = i + 1
            typ = ParseType(argv[i])

        elif infile is None:
            infile = arg

        elif outfile is None:
            outfile = arg

        else:
            return Usage()

        i = i + 1

    if infile is None:
        return Usage()
    if outfile is None:
        return Usage()
    if inNoData is None:
        return Usage()
    if outNoData is None:
        return Usage()

    indataset = gdal.Open(infile, gdal.GA_ReadOnly)

    out_driver = gdal.GetDriverByName(driver_name)
    outdataset = out_driver.Create(outfile, indataset.RasterXSize, indataset.RasterYSize, indataset.RasterCount, typ)

    gt = indataset.GetGeoTransform()
    if gt is not None and gt != (0.0, 1.0, 0.0, 0.0, 0.0, 1.0):
        outdataset.SetGeoTransform(gt)

    prj = indataset.GetProjectionRef()
    if prj:
        outdataset.SetProjection(prj)

    for iBand in range(1, indataset.RasterCount + 1):
        inband = indataset.GetRasterBand(iBand)
        outband = outdataset.GetRasterBand(iBand)

        for i in range(inband.YSize - 1, -1, -1):
            scanline = inband.ReadAsArray(0, i, inband.XSize, 1, inband.XSize, 1)
            scanline = np.choose(np.equal(scanline, inNoData),
                                    (scanline, outNoData))
            outband.WriteArray(scanline, 0, i)
    return 0


if __name__ == '__main__':
    sys.exit(main(sys.argv))

