/* * Copyright 2018 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @defgroup ADataSpace Data Space * * ADataSpace describes how to interpret colors. * @{ */ /** * @file data_space.h */ #ifndef ANDROID_DATA_SPACE_H #define ANDROID_DATA_SPACE_H #include #include __BEGIN_DECLS /** * ADataSpace. */ enum ADataSpace { /** * Default-assumption data space, when not explicitly specified. * * It is safest to assume the buffer is an image with sRGB primaries and * encoding ranges, but the consumer and/or the producer of the data may * simply be using defaults. No automatic gamma transform should be * expected, except for a possible display gamma transform when drawn to a * screen. */ ADATASPACE_UNKNOWN = 0, /** * Color-description aspects * * The following aspects define various characteristics of the color * specification. These represent bitfields, so that a data space value * can specify each of them independently. */ /** * Standard aspect * * Defines the chromaticity coordinates of the source primaries in terms of * the CIE 1931 definition of x and y specified in ISO 11664-1. */ STANDARD_MASK = 63 << 16, /** * Chromacity coordinates are unknown or are determined by the application. * Implementations shall use the following suggested standards: * * All YCbCr formats: BT709 if size is 720p or larger (since most video * content is letterboxed this corresponds to width is * 1280 or greater, or height is 720 or greater). * BT601_625 if size is smaller than 720p or is JPEG. * All RGB formats: BT709. * * For all other formats standard is undefined, and implementations should use * an appropriate standard for the data represented. */ STANDARD_UNSPECIFIED = 0 << 16, /** * Primaries: x y * green 0.300 0.600 * blue 0.150 0.060 * red 0.640 0.330 * white (D65) 0.3127 0.3290 * * Use the unadjusted KR = 0.2126, KB = 0.0722 luminance interpretation * for RGB conversion. */ STANDARD_BT709 = 1 << 16, /** * Primaries: x y * green 0.290 0.600 * blue 0.150 0.060 * red 0.640 0.330 * white (D65) 0.3127 0.3290 * * KR = 0.299, KB = 0.114. This adjusts the luminance interpretation * for RGB conversion from the one purely determined by the primaries * to minimize the color shift into RGB space that uses BT.709 * primaries. */ STANDARD_BT601_625 = 2 << 16, /** * Primaries: x y * green 0.290 0.600 * blue 0.150 0.060 * red 0.640 0.330 * white (D65) 0.3127 0.3290 * * Use the unadjusted KR = 0.222, KB = 0.071 luminance interpretation * for RGB conversion. */ STANDARD_BT601_625_UNADJUSTED = 3 << 16, /** * Primaries: x y * green 0.310 0.595 * blue 0.155 0.070 * red 0.630 0.340 * white (D65) 0.3127 0.3290 * * KR = 0.299, KB = 0.114. This adjusts the luminance interpretation * for RGB conversion from the one purely determined by the primaries * to minimize the color shift into RGB space that uses BT.709 * primaries. */ STANDARD_BT601_525 = 4 << 16, /** * Primaries: x y * green 0.310 0.595 * blue 0.155 0.070 * red 0.630 0.340 * white (D65) 0.3127 0.3290 * * Use the unadjusted KR = 0.212, KB = 0.087 luminance interpretation * for RGB conversion (as in SMPTE 240M). */ STANDARD_BT601_525_UNADJUSTED = 5 << 16, /** * Primaries: x y * green 0.170 0.797 * blue 0.131 0.046 * red 0.708 0.292 * white (D65) 0.3127 0.3290 * * Use the unadjusted KR = 0.2627, KB = 0.0593 luminance interpretation * for RGB conversion. */ STANDARD_BT2020 = 6 << 16, /** * Primaries: x y * green 0.170 0.797 * blue 0.131 0.046 * red 0.708 0.292 * white (D65) 0.3127 0.3290 * * Use the unadjusted KR = 0.2627, KB = 0.0593 luminance interpretation * for RGB conversion using the linear domain. */ STANDARD_BT2020_CONSTANT_LUMINANCE = 7 << 16, /** * Primaries: x y * green 0.21 0.71 * blue 0.14 0.08 * red 0.67 0.33 * white (C) 0.310 0.316 * * Use the unadjusted KR = 0.30, KB = 0.11 luminance interpretation * for RGB conversion. */ STANDARD_BT470M = 8 << 16, /** * Primaries: x y * green 0.243 0.692 * blue 0.145 0.049 * red 0.681 0.319 * white (C) 0.310 0.316 * * Use the unadjusted KR = 0.254, KB = 0.068 luminance interpretation * for RGB conversion. */ STANDARD_FILM = 9 << 16, /** * SMPTE EG 432-1 and SMPTE RP 431-2. (DCI-P3) * Primaries: x y * green 0.265 0.690 * blue 0.150 0.060 * red 0.680 0.320 * white (D65) 0.3127 0.3290 */ STANDARD_DCI_P3 = 10 << 16, /** * Adobe RGB * Primaries: x y * green 0.210 0.710 * blue 0.150 0.060 * red 0.640 0.330 * white (D65) 0.3127 0.3290 */ STANDARD_ADOBE_RGB = 11 << 16, /** * Transfer aspect * * Transfer characteristics are the opto-electronic transfer characteristic * at the source as a function of linear optical intensity (luminance). * * For digital signals, E corresponds to the recorded value. Normally, the * transfer function is applied in RGB space to each of the R, G and B * components independently. This may result in color shift that can be * minized by applying the transfer function in Lab space only for the L * component. Implementation may apply the transfer function in RGB space * for all pixel formats if desired. */ TRANSFER_MASK = 31 << 22, /** * Transfer characteristics are unknown or are determined by the * application. * * Implementations should use the following transfer functions: * * For YCbCr formats: use TRANSFER_SMPTE_170M * For RGB formats: use TRANSFER_SRGB * * For all other formats transfer function is undefined, and implementations * should use an appropriate standard for the data represented. */ TRANSFER_UNSPECIFIED = 0 << 22, /** * Transfer characteristic curve: * E = L * L - luminance of image 0 <= L <= 1 for conventional colorimetry * E - corresponding electrical signal */ TRANSFER_LINEAR = 1 << 22, /** * Transfer characteristic curve: * * E = 1.055 * L^(1/2.4) - 0.055 for 0.0031308 <= L <= 1 * = 12.92 * L for 0 <= L < 0.0031308 * L - luminance of image 0 <= L <= 1 for conventional colorimetry * E - corresponding electrical signal */ TRANSFER_SRGB = 2 << 22, /** * BT.601 525, BT.601 625, BT.709, BT.2020 * * Transfer characteristic curve: * E = 1.099 * L ^ 0.45 - 0.099 for 0.018 <= L <= 1 * = 4.500 * L for 0 <= L < 0.018 * L - luminance of image 0 <= L <= 1 for conventional colorimetry * E - corresponding electrical signal */ TRANSFER_SMPTE_170M = 3 << 22, /** * Assumed display gamma 2.2. * * Transfer characteristic curve: * E = L ^ (1/2.2) * L - luminance of image 0 <= L <= 1 for conventional colorimetry * E - corresponding electrical signal */ TRANSFER_GAMMA2_2 = 4 << 22, /** * display gamma 2.6. * * Transfer characteristic curve: * E = L ^ (1/2.6) * L - luminance of image 0 <= L <= 1 for conventional colorimetry * E - corresponding electrical signal */ TRANSFER_GAMMA2_6 = 5 << 22, /** * display gamma 2.8. * * Transfer characteristic curve: * E = L ^ (1/2.8) * L - luminance of image 0 <= L <= 1 for conventional colorimetry * E - corresponding electrical signal */ TRANSFER_GAMMA2_8 = 6 << 22, /** * SMPTE ST 2084 (Dolby Perceptual Quantizer) * * Transfer characteristic curve: * E = ((c1 + c2 * L^n) / (1 + c3 * L^n)) ^ m * c1 = c3 - c2 + 1 = 3424 / 4096 = 0.8359375 * c2 = 32 * 2413 / 4096 = 18.8515625 * c3 = 32 * 2392 / 4096 = 18.6875 * m = 128 * 2523 / 4096 = 78.84375 * n = 0.25 * 2610 / 4096 = 0.1593017578125 * L - luminance of image 0 <= L <= 1 for HDR colorimetry. * L = 1 corresponds to 10000 cd/m2 * E - corresponding electrical signal */ TRANSFER_ST2084 = 7 << 22, /** * ARIB STD-B67 Hybrid Log Gamma * * Transfer characteristic curve: * E = r * L^0.5 for 0 <= L <= 1 * = a * ln(L - b) + c for 1 < L * a = 0.17883277 * b = 0.28466892 * c = 0.55991073 * r = 0.5 * L - luminance of image 0 <= L for HDR colorimetry. L = 1 corresponds * to reference white level of 100 cd/m2 * E - corresponding electrical signal */ TRANSFER_HLG = 8 << 22, /** * Range aspect * * Defines the range of values corresponding to the unit range of 0-1. * This is defined for YCbCr only, but can be expanded to RGB space. */ RANGE_MASK = 7 << 27, /** * Range is unknown or are determined by the application. Implementations * shall use the following suggested ranges: * * All YCbCr formats: limited range. * All RGB or RGBA formats (including RAW and Bayer): full range. * All Y formats: full range * * For all other formats range is undefined, and implementations should use * an appropriate range for the data represented. */ RANGE_UNSPECIFIED = 0 << 27, /** * Full range uses all values for Y, Cb and Cr from * 0 to 2^b-1, where b is the bit depth of the color format. */ RANGE_FULL = 1 << 27, /** * Limited range uses values 16/256*2^b to 235/256*2^b for Y, and * 1/16*2^b to 15/16*2^b for Cb, Cr, R, G and B, where b is the bit depth of * the color format. * * E.g. For 8-bit-depth formats: * Luma (Y) samples should range from 16 to 235, inclusive * Chroma (Cb, Cr) samples should range from 16 to 240, inclusive * * For 10-bit-depth formats: * Luma (Y) samples should range from 64 to 940, inclusive * Chroma (Cb, Cr) samples should range from 64 to 960, inclusive */ RANGE_LIMITED = 2 << 27, /** * Extended range is used for scRGB. Intended for use with * floating point pixel formats. [0.0 - 1.0] is the standard * sRGB space. Values outside the range 0.0 - 1.0 can encode * color outside the sRGB gamut. * Used to blend / merge multiple dataspaces on a single display. */ RANGE_EXTENDED = 3 << 27, /** * scRGB linear encoding: * * The red, green, and blue components are stored in extended sRGB space, * but are linear, not gamma-encoded. * The RGB primaries and the white point are the same as BT.709. * * The values are floating point. * A pixel value of 1.0, 1.0, 1.0 corresponds to sRGB white (D65) at 80 nits. * Values beyond the range [0.0 - 1.0] would correspond to other colors * spaces and/or HDR content. */ ADATASPACE_SCRGB_LINEAR = 406913024, // STANDARD_BT709 | TRANSFER_LINEAR | RANGE_EXTENDED /** * sRGB gamma encoding: * * The red, green and blue components are stored in sRGB space, and * converted to linear space when read, using the SRGB transfer function * for each of the R, G and B components. When written, the inverse * transformation is performed. * * The alpha component, if present, is always stored in linear space and * is left unmodified when read or written. * * Use full range and BT.709 standard. */ ADATASPACE_SRGB = 142671872, // STANDARD_BT709 | TRANSFER_SRGB | RANGE_FULL /** * scRGB: * * The red, green, and blue components are stored in extended sRGB space, * and gamma-encoded using the SRGB transfer function. * The RGB primaries and the white point are the same as BT.709. * * The values are floating point. * A pixel value of 1.0, 1.0, 1.0 corresponds to sRGB white (D65) at 80 nits. * Values beyond the range [0.0 - 1.0] would correspond to other colors * spaces and/or HDR content. */ ADATASPACE_SCRGB = 411107328, // STANDARD_BT709 | TRANSFER_SRGB | RANGE_EXTENDED /** * Display P3 * * Use same primaries and white-point as DCI-P3 * but sRGB transfer function. */ ADATASPACE_DISPLAY_P3 = 143261696, // STANDARD_DCI_P3 | TRANSFER_SRGB | RANGE_FULL /** * ITU-R Recommendation 2020 (BT.2020) * * Ultra High-definition television * * Use full range, SMPTE 2084 (PQ) transfer and BT2020 standard */ ADATASPACE_BT2020_PQ = 163971072, // STANDARD_BT2020 | TRANSFER_ST2084 | RANGE_FULL /** * ITU-R Recommendation 2020 (BT.2020) * * Ultra High-definition television * * Use limited range, SMPTE 2084 (PQ) transfer and BT2020 standard */ ADATASPACE_BT2020_ITU_PQ = 298188800, // STANDARD_BT2020 | TRANSFER_ST2084 | RANGE_LIMITED /** * Adobe RGB * * Use full range, gamma 2.2 transfer and Adobe RGB primaries * Note: Application is responsible for gamma encoding the data as * a 2.2 gamma encoding is not supported in HW. */ ADATASPACE_ADOBE_RGB = 151715840, // STANDARD_ADOBE_RGB | TRANSFER_GAMMA2_2 | RANGE_FULL /** * JPEG File Interchange Format (JFIF) * * Same model as BT.601-625, but all values (Y, Cb, Cr) range from 0 to 255 * * Use full range, SMPTE 170M transfer and BT.601_625 standard. */ ADATASPACE_JFIF = 146931712, // STANDARD_BT601_625 | TRANSFER_SMPTE_170M | RANGE_FULL /** * ITU-R Recommendation 601 (BT.601) - 525-line * * Standard-definition television, 525 Lines (NTSC) * * Use limited range, SMPTE 170M transfer and BT.601_525 standard. */ ADATASPACE_BT601_625 = 281149440, // STANDARD_BT601_625 | TRANSFER_SMPTE_170M | RANGE_LIMITED /** * ITU-R Recommendation 709 (BT.709) * * High-definition television * * Use limited range, SMPTE 170M transfer and BT.709 standard. */ ADATASPACE_BT601_525 = 281280512, // STANDARD_BT601_525 | TRANSFER_SMPTE_170M | RANGE_LIMITED /** * ITU-R Recommendation 2020 (BT.2020) * * Ultra High-definition television * * Use full range, BT.709 transfer and BT2020 standard */ ADATASPACE_BT2020 = 147193856, // STANDARD_BT2020 | TRANSFER_SMPTE_170M | RANGE_FULL /** * ITU-R Recommendation 709 (BT.709) * * High-definition television * * Use limited range, BT.709 transfer and BT.709 standard. */ ADATASPACE_BT709 = 281083904, // STANDARD_BT709 | TRANSFER_SMPTE_170M | RANGE_LIMITED /** * SMPTE EG 432-1 and SMPTE RP 431-2. * * Digital Cinema DCI-P3 * * Use full range, gamma 2.6 transfer and D65 DCI-P3 standard * Note: Application is responsible for gamma encoding the data as * a 2.6 gamma encoding is not supported in HW. */ ADATASPACE_DCI_P3 = 155844608, // STANDARD_DCI_P3 | TRANSFER_GAMMA2_6 | RANGE_FULL /** * sRGB linear encoding: * * The red, green, and blue components are stored in sRGB space, but * are linear, not gamma-encoded. * The RGB primaries and the white point are the same as BT.709. * * The values are encoded using the full range ([0,255] for 8-bit) for all * components. */ ADATASPACE_SRGB_LINEAR = 138477568, // STANDARD_BT709 | TRANSFER_LINEAR | RANGE_FULL /** * Hybrid Log Gamma encoding: * * Use full range, hybrid log gamma transfer and BT2020 standard. */ ADATASPACE_BT2020_HLG = 168165376, // STANDARD_BT2020 | TRANSFER_HLG | RANGE_FULL /** * ITU Hybrid Log Gamma encoding: * * Use limited range, hybrid log gamma transfer and BT2020 standard. */ ADATASPACE_BT2020_ITU_HLG = 302383104, // STANDARD_BT2020 | TRANSFER_HLG | RANGE_LIMITED /** * Depth: * * This value is valid with formats HAL_PIXEL_FORMAT_Y16 and HAL_PIXEL_FORMAT_BLOB. */ DEPTH = 4096, /** * ISO 16684-1:2011(E) Dynamic Depth: * * Embedded depth metadata following the dynamic depth specification. */ DYNAMIC_DEPTH = 4098 }; __END_DECLS #endif // ANDROID_DATA_SPACE_H /** @} */