webrtc/media/base/videocommon_unittest.cc

/*
 *  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 "webrtc/base/gunit.h"
#include "webrtc/media/base/videocommon.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, TestComputeScaleWithLowFps) {
  int scaled_width, scaled_height;

  // Request small enough. Expect no change.
  ComputeScale(2560, 1600, 5, &scaled_width, &scaled_height);
  EXPECT_EQ(2560, scaled_width);
  EXPECT_EQ(1600, scaled_height);

  // Request too many pixels. Expect 1/2 size.
  ComputeScale(4096, 2560, 5, &scaled_width, &scaled_height);
  EXPECT_EQ(2048, scaled_width);
  EXPECT_EQ(1280, scaled_height);

  // Request too many pixels and too wide and tall. Expect 1/4 size.
  ComputeScale(16000, 10000, 5, &scaled_width, &scaled_height);
  EXPECT_EQ(2000, scaled_width);
  EXPECT_EQ(1250, scaled_height);

  // Request too wide. (two 30 inch monitors). Expect 1/2 size.
  ComputeScale(5120, 1600, 5, &scaled_width, &scaled_height);
  EXPECT_EQ(2560, scaled_width);
  EXPECT_EQ(800, scaled_height);

  // Request too wide but not too many pixels. Expect 1/2 size.
  ComputeScale(8192, 1024, 5, &scaled_width, &scaled_height);
  EXPECT_EQ(4096, scaled_width);
  EXPECT_EQ(512, scaled_height);

  // Request too tall. Expect 1/4 size.
  ComputeScale(1024, 8192, 5, &scaled_width, &scaled_height);
  EXPECT_EQ(256, scaled_width);
  EXPECT_EQ(2048, scaled_height);
}

// Same as TestComputeScale but with 15 fps instead of 5 fps.
TEST(VideoCommonTest, TestComputeScaleWithHighFps) {
  int scaled_width, scaled_height;

  // Request small enough but high fps. Expect 1/2 size.
  ComputeScale(2560, 1600, 15, &scaled_width, &scaled_height);
  EXPECT_EQ(1280, scaled_width);
  EXPECT_EQ(800, scaled_height);

  // Request too many pixels. Expect 1/2 size.
  ComputeScale(4096, 2560, 15, &scaled_width, &scaled_height);
  EXPECT_EQ(2048, scaled_width);
  EXPECT_EQ(1280, scaled_height);

  // Request too many pixels and too wide and tall. Expect 1/16 size.
  ComputeScale(64000, 40000, 15, &scaled_width, &scaled_height);
  EXPECT_EQ(4000, scaled_width);
  EXPECT_EQ(2500, scaled_height);

  // Request too wide. (two 30 inch monitors). Expect 1/2 size.
  ComputeScale(5120, 1600, 15, &scaled_width, &scaled_height);
  EXPECT_EQ(2560, scaled_width);
  EXPECT_EQ(800, scaled_height);

  // Request too wide but not too many pixels. Expect 1/2 size.
  ComputeScale(8192, 1024, 15, &scaled_width, &scaled_height);
  EXPECT_EQ(4096, scaled_width);
  EXPECT_EQ(512, scaled_height);

  // Request too tall. Expect 1/4 size.
  ComputeScale(1024, 8192, 15, &scaled_width, &scaled_height);
  EXPECT_EQ(256, scaled_width);
  EXPECT_EQ(2048, scaled_height);
}

TEST(VideoCommonTest, TestComputeCrop) {
  int cropped_width, cropped_height;

  // Request 16:9 to 16:9.  Expect no cropping.
  ComputeCrop(1280, 720,  // Crop size 16:9
              640, 360,  // Frame is 4:3
              1, 1,  // Normal 1:1 pixels
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(640, cropped_width);
  EXPECT_EQ(360, cropped_height);

  // Request 4:3 to 16:9.  Expect vertical.
  ComputeCrop(640, 360,  // Crop size 16:9
              640, 480,  // Frame is 4:3
              1, 1,  // Normal 1:1 pixels
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(640, cropped_width);
  EXPECT_EQ(360, cropped_height);

  // Request 16:9 to 4:3.  Expect horizontal crop.
  ComputeCrop(640, 480,  // Crop size 4:3
              640, 360,  // Frame is 16:9
              1, 1,  // Normal 1:1 pixels
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(480, cropped_width);
  EXPECT_EQ(360, cropped_height);

  // Request 16:9 but VGA has 3:8 pixel aspect ratio. Expect no crop.
  // This occurs on HP4110 on OSX 10.5/10.6/10.7
  ComputeCrop(640, 360,  // Crop size 16:9
              640, 480,  // Frame is 4:3
              3, 8,  // Pixel aspect ratio is tall
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(640, cropped_width);
  EXPECT_EQ(480, cropped_height);

  // Request 16:9 but QVGA has 15:11 pixel aspect ratio. Expect horizontal crop.
  // This occurs on Logitech B910 on OSX 10.5/10.6/10.7 in Hangouts.
  ComputeCrop(640, 360,  // Crop size 16:9
              320, 240,  // Frame is 4:3
              15, 11,  // Pixel aspect ratio is wide
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(312, cropped_width);
  EXPECT_EQ(240, cropped_height);

  // Request 16:10 but QVGA has 15:11 pixel aspect ratio.
  // Expect horizontal crop.
  // This occurs on Logitech B910 on OSX 10.5/10.6/10.7 in gmail.
  ComputeCrop(640, 400,  // Crop size 16:10
              320, 240,  // Frame is 4:3
              15, 11,  // Pixel aspect ratio is wide
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(280, cropped_width);
  EXPECT_EQ(240, cropped_height);

  // Request 16:9 but VGA has 6:5 pixel aspect ratio. Expect vertical crop.
  // This occurs on Logitech QuickCam Pro C9000 on OSX
  ComputeCrop(640, 360,  // Crop size 16:9
              640, 480,  // Frame is 4:3
              6, 5,  // Pixel aspect ratio is wide
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(640, cropped_width);
  EXPECT_EQ(432, cropped_height);

  // Request 16:10 but HD is 16:9. Expect horizontal crop.
  // This occurs in settings and local preview with HD experiment.
  ComputeCrop(1280, 800,  // Crop size 16:10
              1280, 720,  // Frame is 4:3
              1, 1,  // Pixel aspect ratio is wide
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(1152, cropped_width);
  EXPECT_EQ(720, cropped_height);

  // Request 16:9 but HD has 3:4 pixel aspect ratio. Expect vertical crop.
  // This occurs on Logitech B910 on OSX 10.5/10.6.7 but not OSX 10.6.8 or 10.7
  ComputeCrop(1280, 720,  // Crop size 16:9
              1280, 720,  // Frame is 4:3
              3, 4,  // Pixel aspect ratio is wide
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(1280, cropped_width);
  EXPECT_EQ(540, cropped_height);

  // Request 16:9 to 3:4 (portrait).  Expect no cropping.
  ComputeCrop(640, 360,  // Crop size 16:9
              640, 480,  // Frame is 3:4 portrait
              1, 1,  // Normal 1:1 pixels
              90,
              &cropped_width, &cropped_height);
  EXPECT_EQ(640, cropped_width);
  EXPECT_EQ(480, cropped_height);

  // Request 9:16 from VGA rotated (portrait).  Expect crop.
  ComputeCrop(360, 640,  // Crop size 9:16
              640, 480,  // Frame is 3:4 portrait
              1, 1,  // Normal 1:1 pixels
              90,
              &cropped_width, &cropped_height);
  EXPECT_EQ(640, cropped_width);
  EXPECT_EQ(360, cropped_height);

  // Cropped size 0x0.  Expect no cropping.
  // This is used when adding multiple capturers
  ComputeCrop(0, 0,  // Crop size 0x0
              1024, 768,  // Frame is 3:4 portrait
              1, 1,  // Normal 1:1 pixels
              0,
              &cropped_width, &cropped_height);
  EXPECT_EQ(1024, cropped_width);
  EXPECT_EQ(768, cropped_height);
}

TEST(VideoCommonTest, TestComputeScaleToSquarePixels) {
  int scaled_width, scaled_height;

  // Pixel aspect ratio is 4:3.  Logical aspect ratio is 16:9.  Expect scale
  // to square pixels with physical aspect ratio of 16:9.
  ComputeScaleToSquarePixels(640, 480,
                             4, 3,  // 4 x 3 pixel aspect ratio
                             &scaled_width, &scaled_height);
  EXPECT_EQ(640, scaled_width);
  EXPECT_EQ(360, scaled_height);

  // Pixel aspect ratio is 3:8.  Physical aspect ratio is 4:3.  Expect scale
  // to square pixels with logical aspect ratio of 1:2.
  // Note that 640x1280 will be scaled down by video adapter to view request
  // of 640*360 and will end up using 320x640.
  ComputeScaleToSquarePixels(640, 480,
                             3, 8,  // 4 x 3 pixel aspect ratio
                             &scaled_width, &scaled_height);
  EXPECT_EQ(640, scaled_width);
  EXPECT_EQ(1280, scaled_height);
}

}  // namespace cricket