add gflags support files from webrtc

files needed for command line support with gtest.
These files are copied directly from webrtc.

TBR=kjellander@chromium.org
BUG=libyuv:507

Review URL: https://codereview.chromium.org/1414483002 .

1 files changed, 253 insertions, 180 deletions

diff --git a/unit_test/unit_test.cc b/unit_test/unit_test.cc
index 83e5910b..e053a413 100644
--- a/unit_test/unit_test.cc
+++ b/unit_test/unit_test.cc
@@ -14,223 +14,296 @@
 
 #include <cstring>
 
+#include "gflags/gflags.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
 // Change this to 1000 for benchmarking.
 // TODO(fbarchard): Add command line parsing to pass this as option.
 #define BENCHMARK_ITERATIONS 1
 
 int fastrand_seed = 0xfb;
 
+DEFINE_int32(libyuv_width, 0, "width of test image.");
+DEFINE_int32(libyuv_height, 0, "height of test image.");
+DEFINE_int32(libyuv_repeat, 0, "number of times to repeat test.");
+DEFINE_int32(libyuv_flags, 0, "cpu flags for reference code. 0 = C -1 = asm");
+
+// For quicker unittests, default is 128 x 72.  But when benchmarking,
+// default to 720p.  Allow size to specify.
+// Set flags to -1 for benchmarking to avoid slower C code.
+
 LibYUVConvertTest::LibYUVConvertTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
     benchmark_height_(72), disable_cpu_flags_(0) {
-    const char* repeat = getenv("LIBYUV_REPEAT");
-    if (repeat) {
-      benchmark_iterations_ = atoi(repeat);  // NOLINT
-      // For quicker unittests, default is 128 x 72.  But when benchmarking,
-      // default to 720p.  Allow size to specify.
-      if (benchmark_iterations_ > 1) {
-        benchmark_width_ = 1280;
-        benchmark_height_ = 720;
-      }
-    }
-    const char* width = getenv("LIBYUV_WIDTH");
-    if (width) {
-      benchmark_width_ = atoi(width);  // NOLINT
-    }
-    const char* height = getenv("LIBYUV_HEIGHT");
-    if (height) {
-      benchmark_height_ = atoi(height);  // NOLINT
-    }
-    const char* cpu_flags = getenv("LIBYUV_FLAGS");
-    if (cpu_flags) {
-      disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
-    }
-    benchmark_pixels_div256_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
-    benchmark_pixels_div1280_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
+  const char* repeat = getenv("LIBYUV_REPEAT");
+  if (repeat) {
+    benchmark_iterations_ = atoi(repeat);  // NOLINT
+  }
+  if (FLAGS_libyuv_repeat) {
+    benchmark_iterations_ = FLAGS_libyuv_repeat;
+  }
+  if (benchmark_iterations_ > 1) {
+    benchmark_width_ = 1280;
+    benchmark_height_ = 720;
+  }
+  const char* width = getenv("LIBYUV_WIDTH");
+  if (width) {
+    benchmark_width_ = atoi(width);  // NOLINT
+  }
+  if (FLAGS_libyuv_width) {
+    benchmark_width_ = FLAGS_libyuv_width;
+  }
+  const char* height = getenv("LIBYUV_HEIGHT");
+  if (height) {
+    benchmark_height_ = atoi(height);  // NOLINT
+  }
+  if (FLAGS_libyuv_height) {
+    benchmark_height_ = FLAGS_libyuv_height;
+  }
+  const char* cpu_flags = getenv("LIBYUV_FLAGS");
+  if (cpu_flags) {
+    disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
+  }
+  if (FLAGS_libyuv_flags) {
+    disable_cpu_flags_ = FLAGS_libyuv_flags;
+  }
+  benchmark_pixels_div256_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
+  benchmark_pixels_div1280_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
 }
 
 LibYUVColorTest::LibYUVColorTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
     benchmark_height_(72), disable_cpu_flags_(0) {
-    const char* repeat = getenv("LIBYUV_REPEAT");
-    if (repeat) {
-      benchmark_iterations_ = atoi(repeat);  // NOLINT
-      // For quicker unittests, default is 128 x 72.  But when benchmarking,
-      // default to 720p.  Allow size to specify.
-      if (benchmark_iterations_ > 1) {
-        benchmark_width_ = 1280;
-        benchmark_height_ = 720;
-      }
-    }
-    const char* width = getenv("LIBYUV_WIDTH");
-    if (width) {
-      benchmark_width_ = atoi(width);  // NOLINT
-    }
-    const char* height = getenv("LIBYUV_HEIGHT");
-    if (height) {
-      benchmark_height_ = atoi(height);  // NOLINT
-    }
-    const char* cpu_flags = getenv("LIBYUV_FLAGS");
-    if (cpu_flags) {
-      disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
-    }
-    benchmark_pixels_div256_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
-    benchmark_pixels_div1280_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
+  const char* repeat = getenv("LIBYUV_REPEAT");
+  if (repeat) {
+    benchmark_iterations_ = atoi(repeat);  // NOLINT
+  }
+  if (FLAGS_libyuv_repeat) {
+    benchmark_iterations_ = FLAGS_libyuv_repeat;
+  }
+  if (benchmark_iterations_ > 1) {
+    benchmark_width_ = 1280;
+    benchmark_height_ = 720;
+  }
+  const char* width = getenv("LIBYUV_WIDTH");
+  if (width) {
+    benchmark_width_ = atoi(width);  // NOLINT
+  }
+  if (FLAGS_libyuv_width) {
+    benchmark_width_ = FLAGS_libyuv_width;
+  }
+  const char* height = getenv("LIBYUV_HEIGHT");
+  if (height) {
+    benchmark_height_ = atoi(height);  // NOLINT
+  }
+  if (FLAGS_libyuv_height) {
+    benchmark_height_ = FLAGS_libyuv_height;
+  }
+  const char* cpu_flags = getenv("LIBYUV_FLAGS");
+  if (cpu_flags) {
+    disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
+  }
+  if (FLAGS_libyuv_flags) {
+    disable_cpu_flags_ = FLAGS_libyuv_flags;
+  }
+  benchmark_pixels_div256_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
+  benchmark_pixels_div1280_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
 }
 
 LibYUVScaleTest::LibYUVScaleTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
     benchmark_height_(72), disable_cpu_flags_(0) {
-    const char* repeat = getenv("LIBYUV_REPEAT");
-    if (repeat) {
-      benchmark_iterations_ = atoi(repeat);  // NOLINT
-      // For quicker unittests, default is 128 x 72.  But when benchmarking,
-      // default to 720p.  Allow size to specify.
-      if (benchmark_iterations_ > 1) {
-        benchmark_width_ = 1280;
-        benchmark_height_ = 720;
-      }
-    }
-    const char* width = getenv("LIBYUV_WIDTH");
-    if (width) {
-      benchmark_width_ = atoi(width);  // NOLINT
-    }
-    const char* height = getenv("LIBYUV_HEIGHT");
-    if (height) {
-      benchmark_height_ = atoi(height);  // NOLINT
-    }
-    const char* cpu_flags = getenv("LIBYUV_FLAGS");
-    if (cpu_flags) {
-      disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
-    }
-    benchmark_pixels_div256_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
-    benchmark_pixels_div1280_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
+  const char* repeat = getenv("LIBYUV_REPEAT");
+  if (repeat) {
+    benchmark_iterations_ = atoi(repeat);  // NOLINT
+  }
+  if (FLAGS_libyuv_repeat) {
+    benchmark_iterations_ = FLAGS_libyuv_repeat;
+  }
+  if (benchmark_iterations_ > 1) {
+    benchmark_width_ = 1280;
+    benchmark_height_ = 720;
+  }
+  const char* width = getenv("LIBYUV_WIDTH");
+  if (width) {
+    benchmark_width_ = atoi(width);  // NOLINT
+  }
+  if (FLAGS_libyuv_width) {
+    benchmark_width_ = FLAGS_libyuv_width;
+  }
+  const char* height = getenv("LIBYUV_HEIGHT");
+  if (height) {
+    benchmark_height_ = atoi(height);  // NOLINT
+  }
+  if (FLAGS_libyuv_height) {
+    benchmark_height_ = FLAGS_libyuv_height;
+  }
+  const char* cpu_flags = getenv("LIBYUV_FLAGS");
+  if (cpu_flags) {
+    disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
+  }
+  if (FLAGS_libyuv_flags) {
+    disable_cpu_flags_ = FLAGS_libyuv_flags;
+  }
+  benchmark_pixels_div256_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
+  benchmark_pixels_div1280_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
 }
 
 LibYUVRotateTest::LibYUVRotateTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
     benchmark_height_(72), disable_cpu_flags_(0) {
-    const char* repeat = getenv("LIBYUV_REPEAT");
-    if (repeat) {
-      benchmark_iterations_ = atoi(repeat);  // NOLINT
-      // For quicker unittests, default is 128 x 72.  But when benchmarking,
-      // default to 720p.  Allow size to specify.
-      if (benchmark_iterations_ > 1) {
-        benchmark_width_ = 1280;
-        benchmark_height_ = 720;
-      }
-    }
-    const char* width = getenv("LIBYUV_WIDTH");
-    if (width) {
-      benchmark_width_ = atoi(width);  // NOLINT
-    }
-    const char* height = getenv("LIBYUV_HEIGHT");
-    if (height) {
-      benchmark_height_ = atoi(height);  // NOLINT
-    }
-    const char* cpu_flags = getenv("LIBYUV_FLAGS");
-    if (cpu_flags) {
-      disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
-    }
-    benchmark_pixels_div256_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
-    benchmark_pixels_div1280_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
+  const char* repeat = getenv("LIBYUV_REPEAT");
+  if (repeat) {
+    benchmark_iterations_ = atoi(repeat);  // NOLINT
+  }
+  if (FLAGS_libyuv_repeat) {
+    benchmark_iterations_ = FLAGS_libyuv_repeat;
+  }
+  if (benchmark_iterations_ > 1) {
+    benchmark_width_ = 1280;
+    benchmark_height_ = 720;
+  }
+  const char* width = getenv("LIBYUV_WIDTH");
+  if (width) {
+    benchmark_width_ = atoi(width);  // NOLINT
+  }
+  if (FLAGS_libyuv_width) {
+    benchmark_width_ = FLAGS_libyuv_width;
+  }
+  const char* height = getenv("LIBYUV_HEIGHT");
+  if (height) {
+    benchmark_height_ = atoi(height);  // NOLINT
+  }
+  if (FLAGS_libyuv_height) {
+    benchmark_height_ = FLAGS_libyuv_height;
+  }
+  const char* cpu_flags = getenv("LIBYUV_FLAGS");
+  if (cpu_flags) {
+    disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
+  }
+  if (FLAGS_libyuv_flags) {
+    disable_cpu_flags_ = FLAGS_libyuv_flags;
+  }
+  benchmark_pixels_div256_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
+  benchmark_pixels_div1280_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
 }
 
 LibYUVPlanarTest::LibYUVPlanarTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
     benchmark_height_(72), disable_cpu_flags_(0) {
-    const char* repeat = getenv("LIBYUV_REPEAT");
-    if (repeat) {
-      benchmark_iterations_ = atoi(repeat);  // NOLINT
-      // For quicker unittests, default is 128 x 72.  But when benchmarking,
-      // default to 720p.  Allow size to specify.
-      if (benchmark_iterations_ > 1) {
-        benchmark_width_ = 1280;
-        benchmark_height_ = 720;
-      }
-    }
-    const char* width = getenv("LIBYUV_WIDTH");
-    if (width) {
-      benchmark_width_ = atoi(width);  // NOLINT
-    }
-    const char* height = getenv("LIBYUV_HEIGHT");
-    if (height) {
-      benchmark_height_ = atoi(height);  // NOLINT
-    }
-    const char* cpu_flags = getenv("LIBYUV_FLAGS");
-    if (cpu_flags) {
-      disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
-    }
-    benchmark_pixels_div256_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
-    benchmark_pixels_div1280_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
+  const char* repeat = getenv("LIBYUV_REPEAT");
+  if (repeat) {
+    benchmark_iterations_ = atoi(repeat);  // NOLINT
+  }
+  if (FLAGS_libyuv_repeat) {
+    benchmark_iterations_ = FLAGS_libyuv_repeat;
+  }
+  if (benchmark_iterations_ > 1) {
+    benchmark_width_ = 1280;
+    benchmark_height_ = 720;
+  }
+  const char* width = getenv("LIBYUV_WIDTH");
+  if (width) {
+    benchmark_width_ = atoi(width);  // NOLINT
+  }
+  if (FLAGS_libyuv_width) {
+    benchmark_width_ = FLAGS_libyuv_width;
+  }
+  const char* height = getenv("LIBYUV_HEIGHT");
+  if (height) {
+    benchmark_height_ = atoi(height);  // NOLINT
+  }
+  if (FLAGS_libyuv_height) {
+    benchmark_height_ = FLAGS_libyuv_height;
+  }
+  const char* cpu_flags = getenv("LIBYUV_FLAGS");
+  if (cpu_flags) {
+    disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
+  }
+  if (FLAGS_libyuv_flags) {
+    disable_cpu_flags_ = FLAGS_libyuv_flags;
+  }
+  benchmark_pixels_div256_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
+  benchmark_pixels_div1280_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
 }
 
 LibYUVBaseTest::LibYUVBaseTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
     benchmark_height_(72), disable_cpu_flags_(0) {
-    const char* repeat = getenv("LIBYUV_REPEAT");
-    if (repeat) {
-      benchmark_iterations_ = atoi(repeat);  // NOLINT
-      // For quicker unittests, default is 128 x 72.  But when benchmarking,
-      // default to 720p.  Allow size to specify.
-      if (benchmark_iterations_ > 1) {
-        benchmark_width_ = 1280;
-        benchmark_height_ = 720;
-      }
-    }
-    const char* width = getenv("LIBYUV_WIDTH");
-    if (width) {
-      benchmark_width_ = atoi(width);  // NOLINT
-    }
-    const char* height = getenv("LIBYUV_HEIGHT");
-    if (height) {
-      benchmark_height_ = atoi(height);  // NOLINT
-    }
-    const char* cpu_flags = getenv("LIBYUV_FLAGS");
-    if (cpu_flags) {
-      disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
-    }
-    benchmark_pixels_div256_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
-    benchmark_pixels_div1280_ = static_cast<int>((
-        static_cast<double>(Abs(benchmark_width_)) *
-        static_cast<double>(Abs(benchmark_height_)) *
-        static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
+  const char* repeat = getenv("LIBYUV_REPEAT");
+  if (repeat) {
+    benchmark_iterations_ = atoi(repeat);  // NOLINT
+  }
+  if (FLAGS_libyuv_repeat) {
+    benchmark_iterations_ = FLAGS_libyuv_repeat;
+  }
+  if (benchmark_iterations_ > 1) {
+    benchmark_width_ = 1280;
+    benchmark_height_ = 720;
+  }
+  const char* width = getenv("LIBYUV_WIDTH");
+  if (width) {
+    benchmark_width_ = atoi(width);  // NOLINT
+  }
+  if (FLAGS_libyuv_width) {
+    benchmark_width_ = FLAGS_libyuv_width;
+  }
+  const char* height = getenv("LIBYUV_HEIGHT");
+  if (height) {
+    benchmark_height_ = atoi(height);  // NOLINT
+  }
+  if (FLAGS_libyuv_height) {
+    benchmark_height_ = FLAGS_libyuv_height;
+  }
+  const char* cpu_flags = getenv("LIBYUV_FLAGS");
+  if (cpu_flags) {
+    disable_cpu_flags_ = atoi(cpu_flags);  // NOLINT
+  }
+  if (FLAGS_libyuv_flags) {
+    disable_cpu_flags_ = FLAGS_libyuv_flags;
+  }
+  benchmark_pixels_div256_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 255.0) / 256.0);
+  benchmark_pixels_div1280_ = static_cast<int>((
+      static_cast<double>(Abs(benchmark_width_)) *
+      static_cast<double>(Abs(benchmark_height_)) *
+      static_cast<double>(benchmark_iterations_)  + 1279.0) / 1280.0);
 }
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
+  google::ParseCommandLineFlags(&argc, &argv, true);
   return RUN_ALL_TESTS();
 }