The Tor Browser: media/libyuv/unit_test/math_test.cc@b8a032363ba2 (annotated)

media/libyuv/unit_test/math_test.cc@b8a032363ba2 (annotated)

media/libyuv/unit_test/math_test.cc

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  *  Copyright 2013 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #include <stdlib.h>
 #include <string.h>
 #include "libyuv/basic_types.h"
 #include "libyuv/cpu_id.h"
 #include "libyuv/row.h"
 #include "libyuv/scale.h"
 #include "libyuv/scale_row.h"
 #include "../unit_test/unit_test.h"
 namespace libyuv {
 TEST_F(libyuvTest, TestFixedDiv) {
   int num[1280];
   int div[1280];
   int result_opt[1280];
   int result_c[1280];
   EXPECT_EQ(0x10000, libyuv::FixedDiv(1, 1));
   EXPECT_EQ(0x7fff0000, libyuv::FixedDiv(0x7fff, 1));
   // TODO(fbarchard): Avoid the following that throw exceptions.
   // EXPECT_EQ(0x100000000, libyuv::FixedDiv(0x10000, 1));
   // EXPECT_EQ(0x80000000, libyuv::FixedDiv(0x8000, 1));
   EXPECT_EQ(0x20000, libyuv::FixedDiv(640 * 2, 640));
   EXPECT_EQ(0x30000, libyuv::FixedDiv(640 * 3, 640));
   EXPECT_EQ(0x40000, libyuv::FixedDiv(640 * 4, 640));
   EXPECT_EQ(0x50000, libyuv::FixedDiv(640 * 5, 640));
   EXPECT_EQ(0x60000, libyuv::FixedDiv(640 * 6, 640));
   EXPECT_EQ(0x70000, libyuv::FixedDiv(640 * 7, 640));
   EXPECT_EQ(0x80000, libyuv::FixedDiv(640 * 8, 640));
   EXPECT_EQ(0xa0000, libyuv::FixedDiv(640 * 10, 640));
   EXPECT_EQ(0x20000, libyuv::FixedDiv(960 * 2, 960));
   EXPECT_EQ(0x08000, libyuv::FixedDiv(640 / 2, 640));
   EXPECT_EQ(0x04000, libyuv::FixedDiv(640 / 4, 640));
   EXPECT_EQ(0x20000, libyuv::FixedDiv(1080 * 2, 1080));
   EXPECT_EQ(0x20000, libyuv::FixedDiv(200000, 100000));
   EXPECT_EQ(0x18000, libyuv::FixedDiv(150000, 100000));
   EXPECT_EQ(0x20000, libyuv::FixedDiv(40000, 20000));
   EXPECT_EQ(0x20000, libyuv::FixedDiv(-40000, -20000));
   EXPECT_EQ(-0x20000, libyuv::FixedDiv(40000, -20000));
   EXPECT_EQ(-0x20000, libyuv::FixedDiv(-40000, 20000));
   EXPECT_EQ(0x10000, libyuv::FixedDiv(4095, 4095));
   EXPECT_EQ(0x10000, libyuv::FixedDiv(4096, 4096));
   EXPECT_EQ(0x10000, libyuv::FixedDiv(4097, 4097));
   EXPECT_EQ(123 * 65536, libyuv::FixedDiv(123, 1));
   for (int i = 1; i < 4100; ++i) {
     EXPECT_EQ(0x10000, libyuv::FixedDiv(i, i));
     EXPECT_EQ(0x20000, libyuv::FixedDiv(i * 2, i));
     EXPECT_EQ(0x30000, libyuv::FixedDiv(i * 3, i));
     EXPECT_EQ(0x40000, libyuv::FixedDiv(i * 4, i));
     EXPECT_EQ(0x08000, libyuv::FixedDiv(i, i * 2));
     EXPECT_NEAR(16384 * 65536 / i, libyuv::FixedDiv(16384, i), 1);
   }
   EXPECT_EQ(123 * 65536, libyuv::FixedDiv(123, 1));
   srandom(time(NULL));
   MemRandomize(reinterpret_cast<uint8*>(&num[0]), sizeof(num));
   MemRandomize(reinterpret_cast<uint8*>(&div[0]), sizeof(div));
   for (int j = 0; j < 1280; ++j) {
     if (div[j] == 0) {
       div[j] = 1280;
     }
     num[j] &= 0xffff;  // Clamp to avoid divide overflow.
   }
   for (int i = 0; i < benchmark_pixels_div1280_; ++i) {
     for (int j = 0; j < 1280; ++j) {
       result_opt[j] = libyuv::FixedDiv(num[j], div[j]);
     }
   }
   for (int j = 0; j < 1280; ++j) {
     result_c[j] = libyuv::FixedDiv_C(num[j], div[j]);
     EXPECT_NEAR(result_c[j], result_opt[j], 1);
   }
 }
 TEST_F(libyuvTest, TestFixedDiv_Opt) {
   int num[1280];
   int div[1280];
   int result_opt[1280];
   int result_c[1280];
   srandom(time(NULL));
   MemRandomize(reinterpret_cast<uint8*>(&num[0]), sizeof(num));
   MemRandomize(reinterpret_cast<uint8*>(&div[0]), sizeof(div));
   for (int j = 0; j < 1280; ++j) {
     num[j] &= 4095;  // Make numerator smaller.
     div[j] &= 4095;  // Make divisor smaller.
     if (div[j] == 0) {
       div[j] = 1280;
     }
   }
   int has_x86 = TestCpuFlag(kCpuHasX86);
   for (int i = 0; i < benchmark_pixels_div1280_; ++i) {
     if (has_x86) {
       for (int j = 0; j < 1280; ++j) {
         result_opt[j] = libyuv::FixedDiv(num[j], div[j]);
       }
     } else {
       for (int j = 0; j < 1280; ++j) {
         result_opt[j] = libyuv::FixedDiv_C(num[j], div[j]);
       }
     }
   }
   for (int j = 0; j < 1280; ++j) {
     result_c[j] = libyuv::FixedDiv_C(num[j], div[j]);
     EXPECT_NEAR(result_c[j], result_opt[j], 1);
   }
 }
 TEST_F(libyuvTest, TestFixedDiv1_Opt) {
   int num[1280];
   int div[1280];
   int result_opt[1280];
   int result_c[1280];
   srandom(time(NULL));
   MemRandomize(reinterpret_cast<uint8*>(&num[0]), sizeof(num));
   MemRandomize(reinterpret_cast<uint8*>(&div[0]), sizeof(div));
   for (int j = 0; j < 1280; ++j) {
     num[j] &= 4095;  // Make numerator smaller.
     div[j] &= 4095;  // Make divisor smaller.
     if (div[j] <= 1) {
       div[j] = 1280;
     }
   }
   int has_x86 = TestCpuFlag(kCpuHasX86);
   for (int i = 0; i < benchmark_pixels_div1280_; ++i) {
     if (has_x86) {
       for (int j = 0; j < 1280; ++j) {
         result_opt[j] = libyuv::FixedDiv1(num[j], div[j]);
       }
     } else {
       for (int j = 0; j < 1280; ++j) {
         result_opt[j] = libyuv::FixedDiv1_C(num[j], div[j]);
       }
     }
   }
   for (int j = 0; j < 1280; ++j) {
     result_c[j] = libyuv::FixedDiv1_C(num[j], div[j]);
     EXPECT_NEAR(result_c[j], result_opt[j], 1);
   }
 }
 }  // namespace libyuv

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media/libyuv/unit_test/math_test.cc@b8a032363ba2 (annotated)

media/libyuv/unit_test/math_test.cc