ui/display/util/edid_parser_unittest.cc

   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