1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/display/util/edid_parser.h" 6 7 #include "base/memory/scoped_ptr.h" 8 #include "testing/gtest/include/gtest/gtest.h" 9 10 namespace ui { 11 12 namespace { 13 14 // Returns the number of characters in the string literal but doesn't count its 15 // terminator NULL byte. 16 #define charsize(str) (arraysize(str) - 1) 17 18 // Sample EDID data extracted from real devices. 19 const unsigned char kNormalDisplay[] = 20 "\x00\xff\xff\xff\xff\xff\xff\x00\x22\xf0\x6c\x28\x01\x01\x01\x01" 21 "\x02\x16\x01\x04\xb5\x40\x28\x78\xe2\x8d\x85\xad\x4f\x35\xb1\x25" 22 "\x0e\x50\x54\x00\x00\x00\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01" 23 "\x01\x01\x01\x01\x01\x01\xe2\x68\x00\xa0\xa0\x40\x2e\x60\x30\x20" 24 "\x36\x00\x81\x90\x21\x00\x00\x1a\xbc\x1b\x00\xa0\x50\x20\x17\x30" 25 "\x30\x20\x36\x00\x81\x90\x21\x00\x00\x1a\x00\x00\x00\xfc\x00\x48" 26 "\x50\x20\x5a\x52\x33\x30\x77\x0a\x20\x20\x20\x20\x00\x00\x00\xff" 27 "\x00\x43\x4e\x34\x32\x30\x32\x31\x33\x37\x51\x0a\x20\x20\x00\x71"; 28 29 const unsigned char kInternalDisplay[] = 30 "\x00\xff\xff\xff\xff\xff\xff\x00\x4c\xa3\x42\x31\x00\x00\x00\x00" 31 "\x00\x15\x01\x03\x80\x1a\x10\x78\x0a\xd3\xe5\x95\x5c\x60\x90\x27" 32 "\x19\x50\x54\x00\x00\x00\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01" 33 "\x01\x01\x01\x01\x01\x01\x9e\x1b\x00\xa0\x50\x20\x12\x30\x10\x30" 34 "\x13\x00\x05\xa3\x10\x00\x00\x19\x00\x00\x00\x0f\x00\x00\x00\x00" 35 "\x00\x00\x00\x00\x00\x23\x87\x02\x64\x00\x00\x00\x00\xfe\x00\x53" 36 "\x41\x4d\x53\x55\x4e\x47\x0a\x20\x20\x20\x20\x20\x00\x00\x00\xfe" 37 "\x00\x31\x32\x31\x41\x54\x31\x31\x2d\x38\x30\x31\x0a\x20\x00\x45"; 38 39 const unsigned char kOverscanDisplay[] = 40 "\x00\xff\xff\xff\xff\xff\xff\x00\x4c\x2d\xfe\x08\x00\x00\x00\x00" 41 "\x29\x15\x01\x03\x80\x10\x09\x78\x0a\xee\x91\xa3\x54\x4c\x99\x26" 42 "\x0f\x50\x54\xbd\xef\x80\x71\x4f\x81\xc0\x81\x00\x81\x80\x95\x00" 43 "\xa9\xc0\xb3\x00\x01\x01\x02\x3a\x80\x18\x71\x38\x2d\x40\x58\x2c" 44 "\x45\x00\xa0\x5a\x00\x00\x00\x1e\x66\x21\x56\xaa\x51\x00\x1e\x30" 45 "\x46\x8f\x33\x00\xa0\x5a\x00\x00\x00\x1e\x00\x00\x00\xfd\x00\x18" 46 "\x4b\x0f\x51\x17\x00\x0a\x20\x20\x20\x20\x20\x20\x00\x00\x00\xfc" 47 "\x00\x53\x41\x4d\x53\x55\x4e\x47\x0a\x20\x20\x20\x20\x20\x01\x1d" 48 "\x02\x03\x1f\xf1\x47\x90\x04\x05\x03\x20\x22\x07\x23\x09\x07\x07" 49 "\x83\x01\x00\x00\xe2\x00\x0f\x67\x03\x0c\x00\x20\x00\xb8\x2d\x01" 50 "\x1d\x80\x18\x71\x1c\x16\x20\x58\x2c\x25\x00\xa0\x5a\x00\x00\x00" 51 "\x9e\x01\x1d\x00\x72\x51\xd0\x1e\x20\x6e\x28\x55\x00\xa0\x5a\x00" 52 "\x00\x00\x1e\x8c\x0a\xd0\x8a\x20\xe0\x2d\x10\x10\x3e\x96\x00\xa0" 53 "\x5a\x00\x00\x00\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" 54 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" 55 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc6"; 56 57 // The EDID info misdetecting overscan once. see crbug.com/226318 58 const unsigned char kMisdetectedDisplay[] = 59 "\x00\xff\xff\xff\xff\xff\xff\x00\x10\xac\x64\x40\x4c\x30\x30\x32" 60 "\x0c\x15\x01\x03\x80\x40\x28\x78\xea\x8d\x85\xad\x4f\x35\xb1\x25" 61 "\x0e\x50\x54\xa5\x4b\x00\x71\x4f\x81\x00\x81\x80\xd1\x00\xa9\x40" 62 "\x01\x01\x01\x01\x01\x01\x28\x3c\x80\xa0\x70\xb0\x23\x40\x30\x20" 63 "\x36\x00\x81\x91\x21\x00\x00\x1a\x00\x00\x00\xff\x00\x50\x48\x35" 64 "\x4e\x59\x31\x33\x4e\x32\x30\x30\x4c\x0a\x00\x00\x00\xfc\x00\x44" 65 "\x45\x4c\x4c\x20\x55\x33\x30\x31\x31\x0a\x20\x20\x00\x00\x00\xfd" 66 "\x00\x31\x56\x1d\x5e\x12\x00\x0a\x20\x20\x20\x20\x20\x20\x01\x38" 67 "\x02\x03\x29\xf1\x50\x90\x05\x04\x03\x02\x07\x16\x01\x06\x11\x12" 68 "\x15\x13\x14\x1f\x20\x23\x0d\x7f\x07\x83\x0f\x00\x00\x67\x03\x0c" 69 "\x00\x10\x00\x38\x2d\xe3\x05\x03\x01\x02\x3a\x80\x18\x71\x38\x2d" 70 "\x40\x58\x2c\x45\x00\x81\x91\x21\x00\x00\x1e\x01\x1d\x80\x18\x71" 71 "\x1c\x16\x20\x58\x2c\x25\x00\x81\x91\x21\x00\x00\x9e\x01\x1d\x00" 72 "\x72\x51\xd0\x1e\x20\x6e\x28\x55\x00\x81\x91\x21\x00\x00\x1e\x8c" 73 "\x0a\xd0\x8a\x20\xe0\x2d\x10\x10\x3e\x96\x00\x81\x91\x21\x00\x00" 74 "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x94"; 75 76 const unsigned char kLP2565A[] = 77 "\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00\x22\xF0\x76\x26\x01\x01\x01\x01" 78 "\x02\x12\x01\x03\x80\x34\x21\x78\xEE\xEF\x95\xA3\x54\x4C\x9B\x26" 79 "\x0F\x50\x54\xA5\x6B\x80\x81\x40\x81\x80\x81\x99\x71\x00\xA9\x00" 80 "\xA9\x40\xB3\x00\xD1\x00\x28\x3C\x80\xA0\x70\xB0\x23\x40\x30\x20" 81 "\x36\x00\x07\x44\x21\x00\x00\x1A\x00\x00\x00\xFD\x00\x30\x55\x1E" 82 "\x5E\x11\x00\x0A\x20\x20\x20\x20\x20\x20\x00\x00\x00\xFC\x00\x48" 83 "\x50\x20\x4C\x50\x32\x34\x36\x35\x0A\x20\x20\x20\x00\x00\x00\xFF" 84 "\x00\x43\x4E\x4B\x38\x30\x32\x30\x34\x48\x4D\x0A\x20\x20\x00\xA4"; 85 86 const unsigned char kLP2565B[] = 87 "\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00\x22\xF0\x75\x26\x01\x01\x01\x01" 88 "\x02\x12\x01\x03\x6E\x34\x21\x78\xEE\xEF\x95\xA3\x54\x4C\x9B\x26" 89 "\x0F\x50\x54\xA5\x6B\x80\x81\x40\x71\x00\xA9\x00\xA9\x40\xA9\x4F" 90 "\xB3\x00\xD1\xC0\xD1\x00\x28\x3C\x80\xA0\x70\xB0\x23\x40\x30\x20" 91 "\x36\x00\x07\x44\x21\x00\x00\x1A\x00\x00\x00\xFD\x00\x30\x55\x1E" 92 "\x5E\x15\x00\x0A\x20\x20\x20\x20\x20\x20\x00\x00\x00\xFC\x00\x48" 93 "\x50\x20\x4C\x50\x32\x34\x36\x35\x0A\x20\x20\x20\x00\x00\x00\xFF" 94 "\x00\x43\x4E\x4B\x38\x30\x32\x30\x34\x48\x4D\x0A\x20\x20\x00\x45"; 95 96 } // namespace 97 98 TEST(EDIDParserTest, ParseOverscanFlag) { 99 bool flag = false; 100 std::vector<uint8_t> edid( 101 kNormalDisplay, kNormalDisplay + charsize(kNormalDisplay)); 102 EXPECT_FALSE(ParseOutputOverscanFlag(edid, &flag)); 103 104 flag = false; 105 edid.assign(kInternalDisplay, kInternalDisplay + charsize(kInternalDisplay)); 106 EXPECT_FALSE(ParseOutputOverscanFlag(edid, &flag)); 107 108 flag = false; 109 edid.assign(kOverscanDisplay, kOverscanDisplay + charsize(kOverscanDisplay)); 110 EXPECT_TRUE(ParseOutputOverscanFlag(edid, &flag)); 111 EXPECT_TRUE(flag); 112 113 flag = false; 114 edid.assign( 115 kMisdetectedDisplay, kMisdetectedDisplay + charsize(kMisdetectedDisplay)); 116 EXPECT_FALSE(ParseOutputOverscanFlag(edid, &flag)); 117 118 flag = false; 119 // Copy |kOverscanDisplay| and set flags to false in it. The overscan flags 120 // are embedded at byte 150 in this specific example. Fix here too when the 121 // contents of kOverscanDisplay is altered. 122 edid.assign(kOverscanDisplay, kOverscanDisplay + charsize(kOverscanDisplay)); 123 edid[150] = '\0'; 124 EXPECT_TRUE(ParseOutputOverscanFlag(edid, &flag)); 125 EXPECT_FALSE(flag); 126 } 127 128 TEST(EDIDParserTest, ParseBrokenOverscanData) { 129 // Do not fill valid data here because it anyway fails to parse the data. 130 std::vector<uint8_t> data; 131 bool flag = false; 132 EXPECT_FALSE(ParseOutputOverscanFlag(data, &flag)); 133 data.assign(126, '\0'); 134 EXPECT_FALSE(ParseOutputOverscanFlag(data, &flag)); 135 136 // extending data because ParseOutputOverscanFlag() will access the data. 137 data.assign(128, '\0'); 138 // The number of CEA extensions is stored at byte 126. 139 data[126] = '\x01'; 140 EXPECT_FALSE(ParseOutputOverscanFlag(data, &flag)); 141 142 data.assign(150, '\0'); 143 data[126] = '\x01'; 144 EXPECT_FALSE(ParseOutputOverscanFlag(data, &flag)); 145 } 146 147 TEST(EDIDParserTest, ParseEDID) { 148 uint16_t manufacturer_id = 0; 149 std::string human_readable_name; 150 std::vector<uint8_t> edid( 151 kNormalDisplay, kNormalDisplay + charsize(kNormalDisplay)); 152 EXPECT_TRUE(ParseOutputDeviceData( 153 edid, &manufacturer_id, &human_readable_name)); 154 EXPECT_EQ(0x22f0u, manufacturer_id); 155 EXPECT_EQ("HP ZR30w", human_readable_name); 156 157 manufacturer_id = 0; 158 human_readable_name.clear(); 159 edid.assign(kInternalDisplay, kInternalDisplay + charsize(kInternalDisplay)); 160 EXPECT_TRUE(ParseOutputDeviceData(edid, &manufacturer_id, NULL)); 161 EXPECT_EQ(0x4ca3u, manufacturer_id); 162 EXPECT_EQ("", human_readable_name); 163 164 // Internal display doesn't have name. 165 EXPECT_TRUE(ParseOutputDeviceData(edid, NULL, &human_readable_name)); 166 EXPECT_TRUE(human_readable_name.empty()); 167 168 manufacturer_id = 0; 169 human_readable_name.clear(); 170 edid.assign(kOverscanDisplay, kOverscanDisplay + charsize(kOverscanDisplay)); 171 EXPECT_TRUE(ParseOutputDeviceData( 172 edid, &manufacturer_id, &human_readable_name)); 173 EXPECT_EQ(0x4c2du, manufacturer_id); 174 EXPECT_EQ("SAMSUNG", human_readable_name); 175 } 176 177 TEST(EDIDParserTest, ParseBrokenEDID) { 178 uint16_t manufacturer_id = 0; 179 std::string human_readable_name; 180 std::vector<uint8_t> edid; 181 182 // length == 0 183 EXPECT_FALSE(ParseOutputDeviceData( 184 edid, &manufacturer_id, &human_readable_name)); 185 186 // name is broken. Copying kNormalDisplay and substitute its name data by 187 // some control code. 188 edid.assign(kNormalDisplay, kNormalDisplay + charsize(kNormalDisplay)); 189 190 // display's name data is embedded in byte 95-107 in this specific example. 191 // Fix here too when the contents of kNormalDisplay is altered. 192 edid[97] = '\x1b'; 193 EXPECT_FALSE(ParseOutputDeviceData( 194 edid, &manufacturer_id, &human_readable_name)); 195 196 // If |human_readable_name| isn't specified, it skips parsing the name. 197 manufacturer_id = 0; 198 EXPECT_TRUE(ParseOutputDeviceData(edid, &manufacturer_id, NULL)); 199 EXPECT_EQ(0x22f0u, manufacturer_id); 200 } 201 202 TEST(EDIDParserTest, GetDisplayId) { 203 // EDID of kLP2565A and B are slightly different but actually the same device. 204 int64_t id1 = -1; 205 int64_t id2 = -1; 206 std::vector<uint8_t> edid(kLP2565A, kLP2565A + charsize(kLP2565A)); 207 EXPECT_TRUE(GetDisplayIdFromEDID(edid, 0, &id1)); 208 edid.assign(kLP2565B, kLP2565B + charsize(kLP2565B)); 209 EXPECT_TRUE(GetDisplayIdFromEDID(edid, 0, &id2)); 210 EXPECT_EQ(id1, id2); 211 EXPECT_NE(-1, id1); 212 } 213 214 TEST(EDIDParserTest, GetDisplayIdFromInternal) { 215 int64_t id = -1; 216 std::vector<uint8_t> edid( 217 kInternalDisplay, kInternalDisplay + charsize(kInternalDisplay)); 218 EXPECT_TRUE(GetDisplayIdFromEDID(edid, 0, &id)); 219 EXPECT_NE(-1, id); 220 } 221 222 TEST(EDIDParserTest, GetDisplayIdFailure) { 223 int64_t id = -1; 224 std::vector<uint8_t> edid; 225 EXPECT_FALSE(GetDisplayIdFromEDID(edid, 0, &id)); 226 EXPECT_EQ(-1, id); 227 } 228 229 } // namespace ui 230
