--- /dev/null
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Implements support for *Sony* colorspaces conversions and transfer functions.
+"""
+
+from __future__ import division
+
+import array
+import os
+
+import PyOpenColorIO as ocio
+
+import aces_ocio.generate_lut as genlut
+from aces_ocio.utilities import ColorSpace, mat44_from_mat33
+
+__author__ = 'ACES Developers'
+__copyright__ = 'Copyright (C) 2014 - 2015 - ACES Developers'
+__license__ = ''
+__maintainer__ = 'ACES Developers'
+__email__ = 'aces@oscars.org'
+__status__ = 'Production'
+
+__all__ = ['create_s_log',
+ 'create_colorspaces']
+
+
+def create_s_log(gamut,
+ transfer_function,
+ lut_directory,
+ lut_resolution_1d,
+ aliases):
+ """
+ Creates colorspace covering the conversion from Sony spaces to ACES, with various
+ transfer functions and encoding gamuts covered
+
+ Parameters
+ ----------
+ gamut : str
+ The name of the encoding gamut to use.
+ transfer_function : str
+ The name of the transfer function to use
+ lut_directory : str or unicode
+ The directory to use when generating LUTs
+ lut_resolution_1d : int
+ The resolution of generated 1D LUTs
+ aliases : list of str
+ Aliases for this colorspace
+
+ Returns
+ -------
+ ColorSpace
+ A ColorSpace container class referencing the LUTs, matrices and identifying
+ information for the requested colorspace.
+ """
+
+ name = '%s - %s' % (transfer_function, gamut)
+ if transfer_function == '':
+ name = 'Linear - %s' % gamut
+ if gamut == '':
+ name = 'Curve - %s' % transfer_function
+
+ cs = ColorSpace(name)
+ cs.description = name
+ cs.aliases = aliases
+ cs.equality_group = ''
+ cs.family = 'Input/Sony'
+ cs.is_data = False
+
+ if gamut and transfer_function:
+ cs.aces_transform_id = 'IDT.Sony.%s_%s_10i.a1.v1' % (
+ transfer_function.replace('-', ''),
+ gamut.replace('-', '').replace(' ', '_'))
+
+ # A linear space needs allocation variables.
+ if transfer_function == '':
+ cs.allocation_type = ocio.Constants.ALLOCATION_LG2
+ cs.allocation_vars = [-8, 5, 0.00390625]
+
+ def s_log1_to_linear(s_log):
+ b = 64.
+ ab = 90.
+ w = 940.
+
+ if s_log >= ab:
+ linear = ((pow(10.,
+ (((s_log - b) /
+ (w - b) - 0.616596 - 0.03) / 0.432699)) -
+ 0.037584) * 0.9)
+ else:
+ linear = (((s_log - b) / (
+ w - b) - 0.030001222851889303) / 5.) * 0.9
+ return linear
+
+ def s_log2_to_linear(s_log):
+ b = 64.
+ ab = 90.
+ w = 940.
+
+ if s_log >= ab:
+ linear = ((219. * (pow(10.,
+ (((s_log - b) /
+ (w - b) - 0.616596 - 0.03) / 0.432699)) -
+ 0.037584) / 155.) * 0.9)
+ else:
+ linear = (((s_log - b) / (
+ w - b) - 0.030001222851889303) / 3.53881278538813) * 0.9
+ return linear
+
+ def s_log3_to_linear(code_value):
+ if code_value >= 171.2102946929:
+ linear = (pow(10, ((code_value - 420) / 261.5)) *
+ (0.18 + 0.01) - 0.01)
+ else:
+ linear = (code_value - 95) * 0.01125000 / (171.2102946929 - 95)
+
+ return linear
+
+ cs.to_reference_transforms = []
+
+ if transfer_function == 'S-Log1':
+ data = array.array('f', '\0' * lut_resolution_1d * 4)
+ for c in range(lut_resolution_1d):
+ data[c] = s_log1_to_linear(1023 * c / (lut_resolution_1d - 1))
+
+ lut = '%s_to_linear.spi1d' % transfer_function
+ genlut.write_SPI_1d(
+ os.path.join(lut_directory, lut),
+ 0,
+ 1,
+ data,
+ lut_resolution_1d,
+ 1)
+
+ cs.to_reference_transforms.append({
+ 'type': 'lutFile',
+ 'path': lut,
+ 'interpolation': 'linear',
+ 'direction': 'forward'})
+ elif transfer_function == 'S-Log2':
+ data = array.array('f', '\0' * lut_resolution_1d * 4)
+ for c in range(lut_resolution_1d):
+ data[c] = s_log2_to_linear(1023 * c / (lut_resolution_1d - 1))
+
+ lut = '%s_to_linear.spi1d' % transfer_function
+ genlut.write_SPI_1d(
+ os.path.join(lut_directory, lut),
+ 0,
+ 1,
+ data,
+ lut_resolution_1d,
+ 1)
+
+ cs.to_reference_transforms.append({
+ 'type': 'lutFile',
+ 'path': lut,
+ 'interpolation': 'linear',
+ 'direction': 'forward'})
+ elif transfer_function == 'S-Log3':
+ data = array.array('f', '\0' * lut_resolution_1d * 4)
+ for c in range(lut_resolution_1d):
+ data[c] = s_log3_to_linear(1023 * c / (lut_resolution_1d - 1))
+
+ lut = '%s_to_linear.spi1d' % transfer_function
+ genlut.write_SPI_1d(
+ os.path.join(lut_directory, lut),
+ 0,
+ 1,
+ data,
+ lut_resolution_1d,
+ 1)
+
+ cs.to_reference_transforms.append({
+ 'type': 'lutFile',
+ 'path': lut,
+ 'interpolation': 'linear',
+ 'direction': 'forward'})
+
+ if gamut == 'S-Gamut':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': mat44_from_mat33(
+ [0.754338638, 0.133697046, 0.111968437,
+ 0.021198141, 1.005410934, -0.026610548,
+ -0.009756991, 0.004508563, 1.005253201]),
+ 'direction': 'forward'})
+ elif gamut == 'S-Gamut Daylight':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': mat44_from_mat33(
+ [0.8764457030, 0.0145411681, 0.1090131290,
+ 0.0774075345, 0.9529571767, -0.0303647111,
+ 0.0573564351, -0.1151066335, 1.0577501984]),
+ 'direction': 'forward'})
+ elif gamut == 'S-Gamut Tungsten':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': mat44_from_mat33(
+ [1.0110238740, -0.1362526051, 0.1252287310,
+ 0.1011994504, 0.9562196265, -0.0574190769,
+ 0.0600766530, -0.1010185315, 1.0409418785]),
+ 'direction': 'forward'})
+ elif gamut == 'S-Gamut3.Cine':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': mat44_from_mat33(
+ [0.6387886672, 0.2723514337, 0.0888598992,
+ -0.0039159061, 1.0880732308, -0.0841573249,
+ -0.0299072021, -0.0264325799, 1.0563397820]),
+ 'direction': 'forward'})
+ elif gamut == 'S-Gamut3':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': mat44_from_mat33(
+ [0.7529825954, 0.1433702162, 0.1036471884,
+ 0.0217076974, 1.0153188355, -0.0370265329,
+ -0.0094160528, 0.0033704179, 1.0060456349]),
+ 'direction': 'forward'})
+
+ cs.from_reference_transforms = []
+ return cs
+
+
+def create_colorspaces(lut_directory, lut_resolution_1d):
+ """
+ Generates the colorspace conversions.
+
+ Parameters
+ ----------
+ lut_directory : str or unicode
+ The directory to use when generating LUTs
+ lut_resolution_1d : int
+ The resolution of generated 1D LUTs
+
+ Returns
+ -------
+ list
+ A list of colorspaces for Sony cameras and encodings
+ """
+
+ colorspaces = []
+
+ # *S-Log1*
+ s_log1_s_gamut = create_s_log(
+ 'S-Gamut',
+ 'S-Log1',
+ lut_directory,
+ lut_resolution_1d,
+ ['slog1_sgamut'])
+ colorspaces.append(s_log1_s_gamut)
+
+ # *S-Log2*
+ s_log2_s_gamut = create_s_log(
+ 'S-Gamut',
+ 'S-Log2',
+ lut_directory,
+ lut_resolution_1d,
+ ['slog2_sgamut'])
+ colorspaces.append(s_log2_s_gamut)
+
+ s_log2_s_gamut_daylight = create_s_log(
+ 'S-Gamut Daylight',
+ 'S-Log2',
+ lut_directory,
+ lut_resolution_1d,
+ ['slog2_sgamutday'])
+ colorspaces.append(s_log2_s_gamut_daylight)
+
+ s_log2_s_gamut_tungsten = create_s_log(
+ 'S-Gamut Tungsten',
+ 'S-Log2',
+ lut_directory,
+ lut_resolution_1d,
+ ['slog2_sgamuttung'])
+ colorspaces.append(s_log2_s_gamut_tungsten)
+
+ # *S-Log3*
+ s_log3_s_gamut3Cine = create_s_log(
+ 'S-Gamut3.Cine',
+ 'S-Log3',
+ lut_directory,
+ lut_resolution_1d,
+ ['slog3_sgamutcine'])
+ colorspaces.append(s_log3_s_gamut3Cine)
+
+ s_log3_s_gamut3 = create_s_log(
+ 'S-Gamut3',
+ 'S-Log3',
+ lut_directory,
+ lut_resolution_1d,
+ ['slog3_sgamut3'])
+ colorspaces.append(s_log3_s_gamut3)
+
+ # Linearization Only
+ s_log1 = create_s_log(
+ '',
+ 'S-Log1',
+ lut_directory,
+ lut_resolution_1d,
+ ['crv_slog1'])
+ colorspaces.append(s_log1)
+
+ s_log2 = create_s_log(
+ '',
+ 'S-Log2',
+ lut_directory,
+ lut_resolution_1d,
+ ['crv_slog2'])
+ colorspaces.append(s_log2)
+
+ s_log3 = create_s_log(
+ '',
+ 'S-Log3',
+ lut_directory,
+ lut_resolution_1d,
+ ['crv_slog3'])
+ colorspaces.append(s_log3)
+
+ # Primaries Only
+ s_gamut = create_s_log(
+ 'S-Gamut',
+ '',
+ lut_directory,
+ lut_resolution_1d,
+ ['lin_sgamut'])
+ colorspaces.append(s_gamut)
+
+ s_gamut_daylight = create_s_log(
+ 'S-Gamut Daylight',
+ '',
+ lut_directory,
+ lut_resolution_1d,
+ ['lin_sgamutday'])
+ colorspaces.append(s_gamut_daylight)
+
+ s_gamut_tungsten = create_s_log(
+ 'S-Gamut Tungsten',
+ '',
+ lut_directory,
+ lut_resolution_1d,
+ ['lin_sgamuttung'])
+ colorspaces.append(s_gamut_tungsten)
+
+ s_gamut3Cine = create_s_log(
+ 'S-Gamut3.Cine',
+ '',
+ lut_directory,
+ lut_resolution_1d,
+ ['lin_sgamut3cine'])
+ colorspaces.append(s_gamut3Cine)
+
+ s_gamut3 = create_s_log(
+ 'S-Gamut3',
+ '',
+ lut_directory,
+ lut_resolution_1d,
+ ['lin_sgamut3'])
+ colorspaces.append(s_gamut3)
+
+ return colorspaces
projects / OpenColorIO-Configs.git / blobdiff