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 /** 43 * graphic.h constants changed in Android 8.0 after ColorStandard values were already public 44 * in Android 7.0. We will not deal with the break in graphic.h here, but list the public 45 * Android SDK MediaFormat values here. 46 */ 47 enum ColorStandard : uint32_t { 48 kColorStandardUnspecified = 0, 49 kColorStandardBT709 = 1, 50 kColorStandardBT601_625 = 2, 51 kColorStandardBT601_625_Unadjusted = 3, // not in SDK 52 kColorStandardBT601_525 = 4, 53 kColorStandardBT601_525_Unadjusted = 5, // not in SDK 54 kColorStandardBT2020 = 6, 55 kColorStandardBT2020Constant = 7, // not in SDK 56 kColorStandardBT470M = 8, // not in SDK 57 kColorStandardFilm = 9, // not in SDK 58 kColorStandardDCI_P3 = 10, // not in SDK, new in Android 8.0 59 60 /* This marks a section of color-standard values that are not supported by graphics HAL, 61 but track defined color primaries-matrix coefficient combinations in media. 62 These are stable for a given release. */ 63 kColorStandardExtendedStart = 64, 64 65 /* This marks a section of color-standard values that are not supported by graphics HAL 66 nor using media defined color primaries or matrix coefficients. These may differ per 67 device. */ 68 kColorStandardVendorStart = 0x10000, 69 }; 70 71 enum ColorTransfer : uint32_t { 72 kColorTransferUnspecified = 0, 73 kColorTransferLinear = 1, 74 kColorTransferSRGB = 2, 75 kColorTransferSMPTE_170M = 3, // not in SDK 76 kColorTransferGamma22 = 4, // not in SDK 77 kColorTransferGamma28 = 5, // not in SDK 78 kColorTransferST2084 = 6, 79 kColorTransferHLG = 7, 80 kColorTransferGamma26 = 8, // not in SDK, new in Android 8.0 81 82 /* This marks a section of color-transfer values that are not supported by graphics HAL, 83 but track media-defined color-transfer. These are stable for a given release. */ 84 kColorTransferExtendedStart = 32, 85 86 /* This marks a section of color-transfer values that are not supported by graphics HAL 87 nor defined by media. These may differ per device. */ 88 kColorTransferVendorStart = 0x10000, 89 }; 90 91 enum ColorRange : uint32_t { 92 kColorRangeUnspecified = 0, 93 kColorRangeFull = 1, 94 kColorRangeLimited = 2, 95 96 /* This marks a section of color-transfer values that are not supported by graphics HAL, 97 but track media-defined color-transfer. These are stable for a given release. */ 98 kColorRangeExtendedStart = 8, 99 100 /* This marks a section of color-transfer values that are not supported by graphics HAL 101 nor defined by media. These may differ per device. */ 102 kColorRangeVendorStart = 0x10000, 103 }; 104 105 /* 106 * Static utilities for codec support 107 */ 108 109 // using int32_t for media range/standard/transfers to denote extended ranges 110 // wrap methods change invalid aspects to the Unspecified value 111 static int32_t wrapColorAspectsIntoColorStandard( 112 ColorAspects::Primaries primaries, ColorAspects::MatrixCoeffs coeffs); 113 static int32_t wrapColorAspectsIntoColorRange(ColorAspects::Range range); 114 static int32_t wrapColorAspectsIntoColorTransfer(ColorAspects::Transfer transfer); 115 116 // unwrap methods change invalid aspects to the Other value 117 static status_t unwrapColorAspectsFromColorRange( 118 int32_t range, ColorAspects::Range *aspect); 119 static status_t unwrapColorAspectsFromColorTransfer( 120 int32_t transfer, ColorAspects::Transfer *aspect); 121 static status_t unwrapColorAspectsFromColorStandard( 122 int32_t standard, 123 ColorAspects::Primaries *primaries, ColorAspects::MatrixCoeffs *coeffs); 124 125 static status_t convertPlatformColorAspectsToCodecAspects( 126 int32_t range, int32_t standard, int32_t transfer, ColorAspects &aspects); 127 static status_t convertCodecColorAspectsToPlatformAspects( 128 const ColorAspects &aspects, int32_t *range, int32_t *standard, int32_t *transfer); 129 130 // converts Other values to Unspecified 131 static void convertCodecColorAspectsToIsoAspects( 132 const ColorAspects &aspects, 133 int32_t *primaries, int32_t *transfer, int32_t *coeffs, bool *fullRange); 134 // converts unsupported values to Other 135 static void convertIsoColorAspectsToCodecAspects( 136 int32_t primaries, int32_t transfer, int32_t coeffs, bool fullRange, 137 ColorAspects &aspects); 138 139 // unpack a uint32_t to a full ColorAspects struct 140 static ColorAspects unpackToColorAspects(uint32_t packed); 141 142 // pack a full ColorAspects struct into a uint32_t 143 static uint32_t packToU32(const ColorAspects &aspects); 144 145 // updates Unspecified color aspects to their defaults based on the video size 146 static void setDefaultCodecColorAspectsIfNeeded( 147 ColorAspects &aspects, int32_t width, int32_t height); 148 149 // it returns the closest dataSpace for given color |aspects|. if |mayExpand| is true, it allows 150 // returning a larger dataSpace that contains the color space given by |aspects|, and is better 151 // suited to blending. This requires implicit color space conversion on part of the device. 152 static android_dataspace getDataSpaceForColorAspects(ColorAspects &aspects, bool mayExpand); 153 154 // converts |dataSpace| to a V0 enum, and returns true if dataSpace is an aspect-only value 155 static bool convertDataSpaceToV0(android_dataspace &dataSpace); 156 157 // compares |aspect| to |orig|. Returns |true| if any aspects have changed, except if they 158 // changed to Unspecified value. It also sets the changed values to Unspecified in |aspect|. 159 static bool checkIfAspectsChangedAndUnspecifyThem( 160 ColorAspects &aspects, const ColorAspects &orig, bool usePlatformAspects = false); 161 162 // finds color config in format, defaulting them to 0. 163 static void getColorConfigFromFormat( 164 const sp<AMessage> &format, int *range, int *standard, int *transfer); 165 166 // copies existing color config from |source| to |target|. 167 static void copyColorConfig(const sp<AMessage> &source, sp<AMessage> &target); 168 169 // finds color config in format as ColorAspects, defaulting them to 0. 170 static void getColorAspectsFromFormat(const sp<AMessage> &format, ColorAspects &aspects); 171 172 // writes |aspects| into format. iff |force| is false, Unspecified values are not 173 // written. 174 static void setColorAspectsIntoFormat( 175 const ColorAspects &aspects, sp<AMessage> &format, bool force = false); 176 177 // finds HDR metadata in format as HDRStaticInfo, defaulting them to 0. 178 // Return |true| if could find HDR metadata in format. Otherwise, return |false|. 179 static bool getHDRStaticInfoFromFormat(const sp<AMessage> &format, HDRStaticInfo *info); 180 181 // writes |info| into format. 182 static void setHDRStaticInfoIntoFormat(const HDRStaticInfo &info, sp<AMessage> &format); 183 }; 184 185 inline static const char *asString(android::ColorUtils::ColorStandard i, const char *def = "??") { 186 using namespace android; 187 switch (i) { 188 case ColorUtils::kColorStandardUnspecified: return "Unspecified"; 189 case ColorUtils::kColorStandardBT709: return "BT709"; 190 case ColorUtils::kColorStandardBT601_625: return "BT601_625"; 191 case ColorUtils::kColorStandardBT601_625_Unadjusted: return "BT601_625_Unadjusted"; 192 case ColorUtils::kColorStandardBT601_525: return "BT601_525"; 193 case ColorUtils::kColorStandardBT601_525_Unadjusted: return "BT601_525_Unadjusted"; 194 case ColorUtils::kColorStandardBT2020: return "BT2020"; 195 case ColorUtils::kColorStandardBT2020Constant: return "BT2020Constant"; 196 case ColorUtils::kColorStandardBT470M: return "BT470M"; 197 case ColorUtils::kColorStandardFilm: return "Film"; 198 case ColorUtils::kColorStandardDCI_P3: return "DCI_P3"; 199 default: return def; 200 } 201 } 202 203 inline static const char *asString(android::ColorUtils::ColorTransfer i, const char *def = "??") { 204 using namespace android; 205 switch (i) { 206 case ColorUtils::kColorTransferUnspecified: return "Unspecified"; 207 case ColorUtils::kColorTransferLinear: return "Linear"; 208 case ColorUtils::kColorTransferSRGB: return "SRGB"; 209 case ColorUtils::kColorTransferSMPTE_170M: return "SMPTE_170M"; 210 case ColorUtils::kColorTransferGamma22: return "Gamma22"; 211 case ColorUtils::kColorTransferGamma28: return "Gamma28"; 212 case ColorUtils::kColorTransferST2084: return "ST2084"; 213 case ColorUtils::kColorTransferHLG: return "HLG"; 214 case ColorUtils::kColorTransferGamma26: return "Gamma26"; 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
