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 struct AMediaFormat; 31 32 namespace android { 33 34 struct ColorUtils { 35 /* 36 * Media-platform color constants. MediaCodec uses (an extended version of) platform-defined 37 * constants that are derived from HAL_DATASPACE, since these are directly exposed to the user. 38 * We extend the values to maintain the richer set of information defined inside media 39 * containers and bitstreams that are not supported by the platform. We also expect vendors 40 * to extend some of these values with vendor-specific values. These are separated into a 41 * vendor-extension section so they won't collide with future platform values. 42 */ 43 44 /** 45 * graphic.h constants changed in Android 8.0 after ColorStandard values were already public 46 * in Android 7.0. We will not deal with the break in graphic.h here, but list the public 47 * Android SDK MediaFormat values here. 48 */ 49 enum ColorStandard : uint32_t { 50 kColorStandardUnspecified = 0, 51 kColorStandardBT709 = 1, 52 kColorStandardBT601_625 = 2, 53 kColorStandardBT601_625_Unadjusted = 3, // not in SDK 54 kColorStandardBT601_525 = 4, 55 kColorStandardBT601_525_Unadjusted = 5, // not in SDK 56 kColorStandardBT2020 = 6, 57 kColorStandardBT2020Constant = 7, // not in SDK 58 kColorStandardBT470M = 8, // not in SDK 59 kColorStandardFilm = 9, // not in SDK 60 kColorStandardDCI_P3 = 10, // not in SDK, new in Android 8.0 61 62 /* This marks a section of color-standard values that are not supported by graphics HAL, 63 but track defined color primaries-matrix coefficient combinations in media. 64 These are stable for a given release. */ 65 kColorStandardExtendedStart = 64, 66 67 /* This marks a section of color-standard values that are not supported by graphics HAL 68 nor using media defined color primaries or matrix coefficients. These may differ per 69 device. */ 70 kColorStandardVendorStart = 0x10000, 71 }; 72 73 enum ColorTransfer : uint32_t { 74 kColorTransferUnspecified = 0, 75 kColorTransferLinear = 1, 76 kColorTransferSRGB = 2, 77 kColorTransferSMPTE_170M = 3, // not in SDK 78 kColorTransferGamma22 = 4, // not in SDK 79 kColorTransferGamma28 = 5, // not in SDK 80 kColorTransferST2084 = 6, 81 kColorTransferHLG = 7, 82 kColorTransferGamma26 = 8, // not in SDK, new in Android 8.0 83 84 /* This marks a section of color-transfer values that are not supported by graphics HAL, 85 but track media-defined color-transfer. These are stable for a given release. */ 86 kColorTransferExtendedStart = 32, 87 88 /* This marks a section of color-transfer values that are not supported by graphics HAL 89 nor defined by media. These may differ per device. */ 90 kColorTransferVendorStart = 0x10000, 91 }; 92 93 enum ColorRange : uint32_t { 94 kColorRangeUnspecified = 0, 95 kColorRangeFull = 1, 96 kColorRangeLimited = 2, 97 98 /* This marks a section of color-transfer values that are not supported by graphics HAL, 99 but track media-defined color-transfer. These are stable for a given release. */ 100 kColorRangeExtendedStart = 8, 101 102 /* This marks a section of color-transfer values that are not supported by graphics HAL 103 nor defined by media. These may differ per device. */ 104 kColorRangeVendorStart = 0x10000, 105 }; 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 static void convertIsoColorAspectsToPlatformAspects( 141 int32_t primaries, int32_t isotransfer, int32_t coeffs, bool fullRange, 142 int32_t *range, int32_t *standard, int32_t *transfer); 143 144 // unpack a uint32_t to a full ColorAspects struct 145 static ColorAspects unpackToColorAspects(uint32_t packed); 146 147 // pack a full ColorAspects struct into a uint32_t 148 static uint32_t packToU32(const ColorAspects &aspects); 149 150 // updates Unspecified color aspects to their defaults based on the video size 151 static void setDefaultCodecColorAspectsIfNeeded( 152 ColorAspects &aspects, int32_t width, int32_t height); 153 154 // it returns the closest dataSpace for given color |aspects|. if |mayExpand| is true, it allows 155 // returning a larger dataSpace that contains the color space given by |aspects|, and is better 156 // suited to blending. This requires implicit color space conversion on part of the device. 157 static android_dataspace getDataSpaceForColorAspects(ColorAspects &aspects, bool mayExpand); 158 159 // converts |dataSpace| to a V0 enum, and returns true if dataSpace is an aspect-only value 160 static bool convertDataSpaceToV0(android_dataspace &dataSpace); 161 162 // compares |aspect| to |orig|. Returns |true| if any aspects have changed, except if they 163 // changed to Unspecified value. It also sets the changed values to Unspecified in |aspect|. 164 static bool checkIfAspectsChangedAndUnspecifyThem( 165 ColorAspects &aspects, const ColorAspects &orig, bool usePlatformAspects = false); 166 167 // finds color config in format, defaulting them to 0. 168 static void getColorConfigFromFormat( 169 const sp<AMessage> &format, int *range, int *standard, int *transfer); 170 171 // copies existing color config from |source| to |target|. 172 static void copyColorConfig(const sp<AMessage> &source, sp<AMessage> &target); 173 174 // finds color config in format as ColorAspects, defaulting them to 0. 175 static void getColorAspectsFromFormat(const sp<AMessage> &format, ColorAspects &aspects); 176 177 // writes |aspects| into format. iff |force| is false, Unspecified values are not 178 // written. 179 static void setColorAspectsIntoFormat( 180 const ColorAspects &aspects, sp<AMessage> &format, bool force = false); 181 182 // finds HDR metadata in format as HDRStaticInfo, defaulting them to 0. 183 // Return |true| if could find HDR metadata in format. Otherwise, return |false|. 184 static bool getHDRStaticInfoFromFormat(const sp<AMessage> &format, HDRStaticInfo *info); 185 186 // writes |info| into format. 187 static void setHDRStaticInfoIntoFormat(const HDRStaticInfo &info, sp<AMessage> &format); 188 // writes |info| into format. 189 static void setHDRStaticInfoIntoAMediaFormat(const HDRStaticInfo &info, AMediaFormat *format); 190 }; 191 192 inline static const char *asString(android::ColorUtils::ColorStandard i, const char *def = "??") { 193 using namespace android; 194 switch (i) { 195 case ColorUtils::kColorStandardUnspecified: return "Unspecified"; 196 case ColorUtils::kColorStandardBT709: return "BT709"; 197 case ColorUtils::kColorStandardBT601_625: return "BT601_625"; 198 case ColorUtils::kColorStandardBT601_625_Unadjusted: return "BT601_625_Unadjusted"; 199 case ColorUtils::kColorStandardBT601_525: return "BT601_525"; 200 case ColorUtils::kColorStandardBT601_525_Unadjusted: return "BT601_525_Unadjusted"; 201 case ColorUtils::kColorStandardBT2020: return "BT2020"; 202 case ColorUtils::kColorStandardBT2020Constant: return "BT2020Constant"; 203 case ColorUtils::kColorStandardBT470M: return "BT470M"; 204 case ColorUtils::kColorStandardFilm: return "Film"; 205 case ColorUtils::kColorStandardDCI_P3: return "DCI_P3"; 206 default: return def; 207 } 208 } 209 210 inline static const char *asString(android::ColorUtils::ColorTransfer i, const char *def = "??") { 211 using namespace android; 212 switch (i) { 213 case ColorUtils::kColorTransferUnspecified: return "Unspecified"; 214 case ColorUtils::kColorTransferLinear: return "Linear"; 215 case ColorUtils::kColorTransferSRGB: return "SRGB"; 216 case ColorUtils::kColorTransferSMPTE_170M: return "SMPTE_170M"; 217 case ColorUtils::kColorTransferGamma22: return "Gamma22"; 218 case ColorUtils::kColorTransferGamma28: return "Gamma28"; 219 case ColorUtils::kColorTransferST2084: return "ST2084"; 220 case ColorUtils::kColorTransferHLG: return "HLG"; 221 case ColorUtils::kColorTransferGamma26: return "Gamma26"; 222 default: return def; 223 } 224 } 225 226 inline static const char *asString(android::ColorUtils::ColorRange i, const char *def = "??") { 227 using namespace android; 228 switch (i) { 229 case ColorUtils::kColorRangeUnspecified: return "Unspecified"; 230 case ColorUtils::kColorRangeFull: return "Full"; 231 case ColorUtils::kColorRangeLimited: return "Limited"; 232 default: return def; 233 } 234 } 235 236 } // namespace android 237 238 #endif // COLOR_UTILS_H_ 239 240