1 /* 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "testing/gtest/include/gtest/gtest.h" 12 #include "vpx/vpx_encoder.h" 13 #include "vpx/vp8cx.h" 14 #include "webrtc/modules/video_coding/codecs/vp8/reference_picture_selection.h" 15 16 using webrtc::ReferencePictureSelection; 17 18 // The minimum time between reference frame updates. Should match the values 19 // set in reference_picture_selection.h 20 static const uint32_t kMinUpdateInterval = 10; 21 // The minimum time between decoder refreshes through restricted prediction. 22 // Should match the values set in reference_picture_selection.h 23 static const int kRtt = 10; 24 25 static const int kNoPropagationGolden = VP8_EFLAG_NO_REF_ARF | 26 VP8_EFLAG_NO_UPD_GF | 27 VP8_EFLAG_NO_UPD_ARF; 28 static const int kNoPropagationAltRef = VP8_EFLAG_NO_REF_GF | 29 VP8_EFLAG_NO_UPD_GF | 30 VP8_EFLAG_NO_UPD_ARF; 31 static const int kPropagateGolden = VP8_EFLAG_FORCE_GF | 32 VP8_EFLAG_NO_UPD_ARF | 33 VP8_EFLAG_NO_REF_GF | 34 VP8_EFLAG_NO_REF_LAST; 35 static const int kPropagateAltRef = VP8_EFLAG_FORCE_ARF | 36 VP8_EFLAG_NO_UPD_GF | 37 VP8_EFLAG_NO_REF_ARF | 38 VP8_EFLAG_NO_REF_LAST; 39 static const int kRefreshFromGolden = VP8_EFLAG_NO_REF_LAST | 40 VP8_EFLAG_NO_REF_ARF; 41 static const int kRefreshFromAltRef = VP8_EFLAG_NO_REF_LAST | 42 VP8_EFLAG_NO_REF_GF; 43 44 45 class TestRPS : public ::testing::Test { 46 protected: 47 virtual void SetUp() { 48 rps_.Init(); 49 // Initialize with sending a key frame and acknowledging it. 50 rps_.EncodedKeyFrame(0); 51 rps_.ReceivedRPSI(0); 52 rps_.SetRtt(kRtt); 53 } 54 55 ReferencePictureSelection rps_; 56 }; 57 58 TEST_F(TestRPS, TestPropagateReferenceFrames) { 59 // Should propagate the alt-ref reference. 60 uint32_t time = (4 * kMinUpdateInterval) / 3 + 1; 61 EXPECT_EQ(rps_.EncodeFlags(1, false, 90 * time), kPropagateAltRef); 62 rps_.ReceivedRPSI(1); 63 time += (4 * (time + kMinUpdateInterval)) / 3 + 1; 64 // Should propagate the golden reference. 65 EXPECT_EQ(rps_.EncodeFlags(2, false, 90 * time), kPropagateGolden); 66 rps_.ReceivedRPSI(2); 67 // Should propagate the alt-ref reference. 68 time = (4 * (time + kMinUpdateInterval)) / 3 + 1; 69 EXPECT_EQ(rps_.EncodeFlags(3, false, 90 * time), kPropagateAltRef); 70 rps_.ReceivedRPSI(3); 71 // Shouldn't propagate any reference frames (except last), and the established 72 // reference is alt-ref. 73 time = time + kMinUpdateInterval; 74 EXPECT_EQ(rps_.EncodeFlags(4, false, 90 * time), kNoPropagationAltRef); 75 } 76 77 TEST_F(TestRPS, TestDecoderRefresh) { 78 uint32_t time = kRtt + 1; 79 // No more than one refresh per RTT. 80 EXPECT_EQ(rps_.ReceivedSLI(90 * time), true); 81 time += 5; 82 EXPECT_EQ(rps_.ReceivedSLI(90 * time), false); 83 time += kRtt - 4; 84 EXPECT_EQ(rps_.ReceivedSLI(90 * time), true); 85 // Enough time have elapsed since the previous reference propagation, we will 86 // therefore get both a refresh from golden and a propagation of alt-ref. 87 EXPECT_EQ(rps_.EncodeFlags(5, true, 90 * time), kRefreshFromGolden | 88 kPropagateAltRef); 89 rps_.ReceivedRPSI(5); 90 time += kRtt + 1; 91 // Enough time for a new refresh, but not enough time for a reference 92 // propagation. 93 EXPECT_EQ(rps_.ReceivedSLI(90 * time), true); 94 EXPECT_EQ(rps_.EncodeFlags(6, true, 90 * time), kRefreshFromAltRef | 95 kNoPropagationAltRef); 96 } 97 98 TEST_F(TestRPS, TestWrap) { 99 EXPECT_EQ(rps_.ReceivedSLI(0xffffffff), true); 100 EXPECT_EQ(rps_.ReceivedSLI(1), false); 101 EXPECT_EQ(rps_.ReceivedSLI(90 * 100), true); 102 103 EXPECT_EQ(rps_.EncodeFlags(7, false, 0xffffffff), kPropagateAltRef); 104 EXPECT_EQ(rps_.EncodeFlags(8, false, 1), kNoPropagationGolden); 105 EXPECT_EQ(rps_.EncodeFlags(10, false, 90 * 100), kPropagateAltRef); 106 } 107
