/*
 *  Copyright (c) 2008 The WebRTC 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 "media/base/video_common.h"

#include "test/gtest.h"

namespace cricket {

TEST(VideoCommonTest, TestCanonicalFourCC) {
  // Canonical fourccs are not changed.
  EXPECT_EQ(FOURCC_I420, CanonicalFourCC(FOURCC_I420));
  // The special FOURCC_ANY value is not changed.
  EXPECT_EQ(FOURCC_ANY, CanonicalFourCC(FOURCC_ANY));
  // Aliases are translated to the canonical equivalent.
  EXPECT_EQ(FOURCC_I420, CanonicalFourCC(FOURCC_IYUV));
  EXPECT_EQ(FOURCC_I422, CanonicalFourCC(FOURCC_YU16));
  EXPECT_EQ(FOURCC_I444, CanonicalFourCC(FOURCC_YU24));
  EXPECT_EQ(FOURCC_YUY2, CanonicalFourCC(FOURCC_YUYV));
  EXPECT_EQ(FOURCC_YUY2, CanonicalFourCC(FOURCC_YUVS));
  EXPECT_EQ(FOURCC_UYVY, CanonicalFourCC(FOURCC_HDYC));
  EXPECT_EQ(FOURCC_UYVY, CanonicalFourCC(FOURCC_2VUY));
  EXPECT_EQ(FOURCC_MJPG, CanonicalFourCC(FOURCC_JPEG));
  EXPECT_EQ(FOURCC_MJPG, CanonicalFourCC(FOURCC_DMB1));
  EXPECT_EQ(FOURCC_BGGR, CanonicalFourCC(FOURCC_BA81));
  EXPECT_EQ(FOURCC_RAW, CanonicalFourCC(FOURCC_RGB3));
  EXPECT_EQ(FOURCC_24BG, CanonicalFourCC(FOURCC_BGR3));
  EXPECT_EQ(FOURCC_BGRA, CanonicalFourCC(FOURCC_CM32));
  EXPECT_EQ(FOURCC_RAW, CanonicalFourCC(FOURCC_CM24));
}

// Test conversion between interval and fps
TEST(VideoCommonTest, TestVideoFormatFps) {
  EXPECT_EQ(VideoFormat::kMinimumInterval, VideoFormat::FpsToInterval(0));
  EXPECT_EQ(rtc::kNumNanosecsPerSec / 20, VideoFormat::FpsToInterval(20));
  EXPECT_EQ(20, VideoFormat::IntervalToFps(rtc::kNumNanosecsPerSec / 20));
  EXPECT_EQ(0, VideoFormat::IntervalToFps(0));
}

// Test IsSize0x0
TEST(VideoCommonTest, TestVideoFormatIsSize0x0) {
  VideoFormat format;
  EXPECT_TRUE(format.IsSize0x0());
  format.width = 320;
  EXPECT_FALSE(format.IsSize0x0());
}

// Test ToString: print fourcc when it is printable.
TEST(VideoCommonTest, TestVideoFormatToString) {
  VideoFormat format;
  EXPECT_EQ("0x0x0", format.ToString());

  format.fourcc = FOURCC_I420;
  format.width = 640;
  format.height = 480;
  format.interval = VideoFormat::FpsToInterval(20);
  EXPECT_EQ("I420 640x480x20", format.ToString());

  format.fourcc = FOURCC_ANY;
  format.width = 640;
  format.height = 480;
  format.interval = VideoFormat::FpsToInterval(20);
  EXPECT_EQ("640x480x20", format.ToString());
}

// Test comparison.
TEST(VideoCommonTest, TestVideoFormatCompare) {
  VideoFormat format(640, 480, VideoFormat::FpsToInterval(20), FOURCC_I420);
  VideoFormat format2;
  EXPECT_NE(format, format2);

  // Same pixelrate, different fourcc.
  format2 = format;
  format2.fourcc = FOURCC_YUY2;
  EXPECT_NE(format, format2);
  EXPECT_FALSE(format.IsPixelRateLess(format2) ||
               format2.IsPixelRateLess(format2));

  format2 = format;
  format2.interval /= 2;
  EXPECT_TRUE(format.IsPixelRateLess(format2));

  format2 = format;
  format2.width *= 2;
  EXPECT_TRUE(format.IsPixelRateLess(format2));
}

TEST(VideoCommonTest, GreatestCommonDivisor) {
  EXPECT_EQ(GreatestCommonDivisor(0, 1000), 1000);
  EXPECT_EQ(GreatestCommonDivisor(1, 1), 1);
  EXPECT_EQ(GreatestCommonDivisor(8, 12), 4);
  EXPECT_EQ(GreatestCommonDivisor(24, 54), 6);
}

TEST(VideoCommonTest, LeastCommonMultiple) {
  EXPECT_EQ(LeastCommonMultiple(1, 1), 1);
  EXPECT_EQ(LeastCommonMultiple(2, 3), 6);
  EXPECT_EQ(LeastCommonMultiple(16, 32), 32);
}

}  // namespace cricket