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      1 // Copyright (c) 2012 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 "remoting/codec/video_decoder_vp8.h"
      6 
      7 #include "media/base/video_frame.h"
      8 #include "remoting/codec/codec_test.h"
      9 #include "remoting/codec/video_encoder_vp8.h"
     10 #include "testing/gtest/include/gtest/gtest.h"
     11 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
     12 
     13 namespace remoting {
     14 
     15 class VideoDecoderVp8Test : public testing::Test {
     16  protected:
     17   VideoEncoderVp8 encoder_;
     18   VideoDecoderVp8 decoder_;
     19 
     20   void TestGradient(int screen_width, int screen_height,
     21                     int view_width, int view_height,
     22                     double max_error_limit, double mean_error_limit) {
     23     TestVideoEncoderDecoderGradient(
     24         &encoder_, &decoder_,
     25         webrtc::DesktopSize(screen_width, screen_height),
     26         webrtc::DesktopSize(view_width, view_height),
     27         max_error_limit, mean_error_limit);
     28   }
     29 };
     30 
     31 TEST_F(VideoDecoderVp8Test, VideoEncodeAndDecode) {
     32   TestVideoEncoderDecoder(&encoder_, &decoder_, false);
     33 }
     34 
     35 // Check that encoding and decoding a particular frame doesn't change the
     36 // frame too much. The frame used is a gradient, which does not contain sharp
     37 // transitions, so encoding lossiness should not be too high.
     38 TEST_F(VideoDecoderVp8Test, Gradient) {
     39   TestGradient(320, 240, 320, 240, 0.04, 0.02);
     40 }
     41 
     42 TEST_F(VideoDecoderVp8Test, GradientScaleUpEvenToEven) {
     43   TestGradient(320, 240, 640, 480, 0.04, 0.02);
     44 }
     45 
     46 TEST_F(VideoDecoderVp8Test, GradientScaleUpEvenToOdd) {
     47   TestGradient(320, 240, 641, 481, 0.04, 0.02);
     48 }
     49 
     50 TEST_F(VideoDecoderVp8Test, GradientScaleUpOddToEven) {
     51   TestGradient(321, 241, 640, 480, 0.04, 0.02);
     52 }
     53 
     54 TEST_F(VideoDecoderVp8Test, GradientScaleUpOddToOdd) {
     55   TestGradient(321, 241, 641, 481, 0.04, 0.02);
     56 }
     57 
     58 TEST_F(VideoDecoderVp8Test, GradientScaleDownEvenToEven) {
     59   TestGradient(320, 240, 160, 120, 0.04, 0.02);
     60 }
     61 
     62 TEST_F(VideoDecoderVp8Test, GradientScaleDownEvenToOdd) {
     63   // The maximum error is non-deterministic. The mean error is not too high,
     64   // which suggests that the problem is restricted to a small area of the output
     65   // image. See crbug.com/139437 and crbug.com/139633.
     66   TestGradient(320, 240, 161, 121, 1.0, 0.02);
     67 }
     68 
     69 TEST_F(VideoDecoderVp8Test, GradientScaleDownOddToEven) {
     70   TestGradient(321, 241, 160, 120, 0.04, 0.02);
     71 }
     72 
     73 TEST_F(VideoDecoderVp8Test, GradientScaleDownOddToOdd) {
     74   TestGradient(321, 241, 161, 121, 0.04, 0.02);
     75 }
     76 
     77 }  // namespace remoting
     78