1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef COLOR_UTILS_H_ 18 19 #define COLOR_UTILS_H_ 20 21 #include <stdint.h> 22 23 #define STRINGIFY_ENUMS 24 25 #include <media/stagefright/foundation/AMessage.h> 26 27 #include <media/hardware/VideoAPI.h> 28 #include <system/graphics.h> 29 30 namespace android { 31 32 struct ColorUtils { 33 /* 34 * Media-platform color constants. MediaCodec uses (an extended version of) platform-defined 35 * constants that are derived from HAL_DATASPACE, since these are directly exposed to the user. 36 * We extend the values to maintain the richer set of information defined inside media 37 * containers and bitstreams that are not supported by the platform. We also expect vendors 38 * to extend some of these values with vendor-specific values. These are separated into a 39 * vendor-extension section so they won't collide with future platform values. 40 */ 41 42 #define GET_HAL_ENUM(class, name) HAL_DATASPACE_##class##name 43 #define GET_HAL_BITFIELD(class, name) (GET_HAL_ENUM(class, _##name) >> GET_HAL_ENUM(class, _SHIFT)) 44 45 enum ColorStandard : uint32_t { 46 kColorStandardUnspecified = GET_HAL_BITFIELD(STANDARD, UNSPECIFIED), 47 kColorStandardBT709 = GET_HAL_BITFIELD(STANDARD, BT709), 48 kColorStandardBT601_625 = GET_HAL_BITFIELD(STANDARD, BT601_625), 49 kColorStandardBT601_625_Unadjusted = GET_HAL_BITFIELD(STANDARD, BT601_625_UNADJUSTED), 50 kColorStandardBT601_525 = GET_HAL_BITFIELD(STANDARD, BT601_525), 51 kColorStandardBT601_525_Unadjusted = GET_HAL_BITFIELD(STANDARD, BT601_525_UNADJUSTED), 52 kColorStandardBT2020 = GET_HAL_BITFIELD(STANDARD, BT2020), 53 kColorStandardBT2020Constant = GET_HAL_BITFIELD(STANDARD, BT2020_CONSTANT_LUMINANCE), 54 kColorStandardBT470M = GET_HAL_BITFIELD(STANDARD, BT470M), 55 kColorStandardFilm = GET_HAL_BITFIELD(STANDARD, FILM), 56 kColorStandardMax = GET_HAL_BITFIELD(STANDARD, MASK), 57 58 /* This marks a section of color-standard values that are not supported by graphics HAL, 59 but track defined color primaries-matrix coefficient combinations in media. 60 These are stable for a given release. */ 61 kColorStandardExtendedStart = kColorStandardMax + 1, 62 63 /* This marks a section of color-standard values that are not supported by graphics HAL 64 nor using media defined color primaries or matrix coefficients. These may differ per 65 device. */ 66 kColorStandardVendorStart = 0x10000, 67 }; 68 69 enum ColorTransfer : uint32_t { 70 kColorTransferUnspecified = GET_HAL_BITFIELD(TRANSFER, UNSPECIFIED), 71 kColorTransferLinear = GET_HAL_BITFIELD(TRANSFER, LINEAR), 72 kColorTransferSRGB = GET_HAL_BITFIELD(TRANSFER, SRGB), 73 kColorTransferSMPTE_170M = GET_HAL_BITFIELD(TRANSFER, SMPTE_170M), 74 kColorTransferGamma22 = GET_HAL_BITFIELD(TRANSFER, GAMMA2_2), 75 kColorTransferGamma28 = GET_HAL_BITFIELD(TRANSFER, GAMMA2_8), 76 kColorTransferST2084 = GET_HAL_BITFIELD(TRANSFER, ST2084), 77 kColorTransferHLG = GET_HAL_BITFIELD(TRANSFER, HLG), 78 kColorTransferMax = GET_HAL_BITFIELD(TRANSFER, MASK), 79 80 /* This marks a section of color-transfer values that are not supported by graphics HAL, 81 but track media-defined color-transfer. These are stable for a given release. */ 82 kColorTransferExtendedStart = kColorTransferMax + 1, 83 84 /* This marks a section of color-transfer values that are not supported by graphics HAL 85 nor defined by media. These may differ per device. */ 86 kColorTransferVendorStart = 0x10000, 87 }; 88 89 enum ColorRange : uint32_t { 90 kColorRangeUnspecified = GET_HAL_BITFIELD(RANGE, UNSPECIFIED), 91 kColorRangeFull = GET_HAL_BITFIELD(RANGE, FULL), 92 kColorRangeLimited = GET_HAL_BITFIELD(RANGE, LIMITED), 93 kColorRangeMax = GET_HAL_BITFIELD(RANGE, MASK), 94 95 /* This marks a section of color-transfer values that are not supported by graphics HAL, 96 but track media-defined color-transfer. These are stable for a given release. */ 97 kColorRangeExtendedStart = kColorRangeMax + 1, 98 99 /* This marks a section of color-transfer values that are not supported by graphics HAL 100 nor defined by media. These may differ per device. */ 101 kColorRangeVendorStart = 0x10000, 102 }; 103 104 #undef GET_HAL_BITFIELD 105 #undef GET_HAL_ENUM 106 107 /* 108 * Static utilities for codec support 109 */ 110 111 // using int32_t for media range/standard/transfers to denote extended ranges 112 // wrap methods change invalid aspects to the Unspecified value 113 static int32_t wrapColorAspectsIntoColorStandard( 114 ColorAspects::Primaries primaries, ColorAspects::MatrixCoeffs coeffs); 115 static int32_t wrapColorAspectsIntoColorRange(ColorAspects::Range range); 116 static int32_t wrapColorAspectsIntoColorTransfer(ColorAspects::Transfer transfer); 117 118 // unwrap methods change invalid aspects to the Other value 119 static status_t unwrapColorAspectsFromColorRange( 120 int32_t range, ColorAspects::Range *aspect); 121 static status_t unwrapColorAspectsFromColorTransfer( 122 int32_t transfer, ColorAspects::Transfer *aspect); 123 static status_t unwrapColorAspectsFromColorStandard( 124 int32_t standard, 125 ColorAspects::Primaries *primaries, ColorAspects::MatrixCoeffs *coeffs); 126 127 static status_t convertPlatformColorAspectsToCodecAspects( 128 int32_t range, int32_t standard, int32_t transfer, ColorAspects &aspects); 129 static status_t convertCodecColorAspectsToPlatformAspects( 130 const ColorAspects &aspects, int32_t *range, int32_t *standard, int32_t *transfer); 131 132 // converts Other values to Unspecified 133 static void convertCodecColorAspectsToIsoAspects( 134 const ColorAspects &aspects, 135 int32_t *primaries, int32_t *transfer, int32_t *coeffs, bool *fullRange); 136 // converts unsupported values to Other 137 static void convertIsoColorAspectsToCodecAspects( 138 int32_t primaries, int32_t transfer, int32_t coeffs, bool fullRange, 139 ColorAspects &aspects); 140 141 // unpack a uint32_t to a full ColorAspects struct 142 static ColorAspects unpackToColorAspects(uint32_t packed); 143 144 // pack a full ColorAspects struct into a uint32_t 145 static uint32_t packToU32(const ColorAspects &aspects); 146 147 // updates Unspecified color aspects to their defaults based on the video size 148 static void setDefaultCodecColorAspectsIfNeeded( 149 ColorAspects &aspects, int32_t width, int32_t height); 150 151 // it returns the closest dataSpace for given color |aspects|. if |mayExpand| is true, it allows 152 // returning a larger dataSpace that contains the color space given by |aspects|, and is better 153 // suited to blending. This requires implicit color space conversion on part of the device. 154 static android_dataspace getDataSpaceForColorAspects(ColorAspects &aspects, bool mayExpand); 155 156 // converts |dataSpace| to a V0 enum, and returns true if dataSpace is an aspect-only value 157 static bool convertDataSpaceToV0(android_dataspace &dataSpace); 158 159 // compares |aspect| to |orig|. Returns |true| if any aspects have changed, except if they 160 // changed to Unspecified value. It also sets the changed values to Unspecified in |aspect|. 161 static bool checkIfAspectsChangedAndUnspecifyThem( 162 ColorAspects &aspects, const ColorAspects &orig, bool usePlatformAspects = false); 163 164 // finds color config in format, defaulting them to 0. 165 static void getColorConfigFromFormat( 166 const sp<AMessage> &format, int *range, int *standard, int *transfer); 167 168 // copies existing color config from |source| to |target|. 169 static void copyColorConfig(const sp<AMessage> &source, sp<AMessage> &target); 170 171 // finds color config in format as ColorAspects, defaulting them to 0. 172 static void getColorAspectsFromFormat(const sp<AMessage> &format, ColorAspects &aspects); 173 174 // writes |aspects| into format. iff |force| is false, Unspecified values are not 175 // written. 176 static void setColorAspectsIntoFormat( 177 const ColorAspects &aspects, sp<AMessage> &format, bool force = false); 178 179 // finds HDR metadata in format as HDRStaticInfo, defaulting them to 0. 180 // Return |true| if could find HDR metadata in format. Otherwise, return |false|. 181 static bool getHDRStaticInfoFromFormat(const sp<AMessage> &format, HDRStaticInfo *info); 182 183 // writes |info| into format. 184 static void setHDRStaticInfoIntoFormat(const HDRStaticInfo &info, sp<AMessage> &format); 185 }; 186 187 inline static const char *asString(android::ColorUtils::ColorStandard i, const char *def = "??") { 188 using namespace android; 189 switch (i) { 190 case ColorUtils::kColorStandardUnspecified: return "Unspecified"; 191 case ColorUtils::kColorStandardBT709: return "BT709"; 192 case ColorUtils::kColorStandardBT601_625: return "BT601_625"; 193 case ColorUtils::kColorStandardBT601_625_Unadjusted: return "BT601_625_Unadjusted"; 194 case ColorUtils::kColorStandardBT601_525: return "BT601_525"; 195 case ColorUtils::kColorStandardBT601_525_Unadjusted: return "BT601_525_Unadjusted"; 196 case ColorUtils::kColorStandardBT2020: return "BT2020"; 197 case ColorUtils::kColorStandardBT2020Constant: return "BT2020Constant"; 198 case ColorUtils::kColorStandardBT470M: return "BT470M"; 199 case ColorUtils::kColorStandardFilm: return "Film"; 200 default: return def; 201 } 202 } 203 204 inline static const char *asString(android::ColorUtils::ColorTransfer i, const char *def = "??") { 205 using namespace android; 206 switch (i) { 207 case ColorUtils::kColorTransferUnspecified: return "Unspecified"; 208 case ColorUtils::kColorTransferLinear: return "Linear"; 209 case ColorUtils::kColorTransferSRGB: return "SRGB"; 210 case ColorUtils::kColorTransferSMPTE_170M: return "SMPTE_170M"; 211 case ColorUtils::kColorTransferGamma22: return "Gamma22"; 212 case ColorUtils::kColorTransferGamma28: return "Gamma28"; 213 case ColorUtils::kColorTransferST2084: return "ST2084"; 214 case ColorUtils::kColorTransferHLG: return "HLG"; 215 default: return def; 216 } 217 } 218 219 inline static const char *asString(android::ColorUtils::ColorRange i, const char *def = "??") { 220 using namespace android; 221 switch (i) { 222 case ColorUtils::kColorRangeUnspecified: return "Unspecified"; 223 case ColorUtils::kColorRangeFull: return "Full"; 224 case ColorUtils::kColorRangeLimited: return "Limited"; 225 default: return def; 226 } 227 } 228 229 } // namespace android 230 231 #endif // COLOR_UTILS_H_ 232 233
