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      1 /*
      2  *  Copyright (c) 2012 The WebM 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 #include <climits>
     11 #include <vector>
     12 #include "third_party/googletest/src/include/gtest/gtest.h"
     13 #include "test/codec_factory.h"
     14 #include "test/encode_test_driver.h"
     15 #include "test/i420_video_source.h"
     16 #include "test/util.h"
     17 
     18 namespace {
     19 
     20 class KeyframeTest : public ::libvpx_test::EncoderTest,
     21     public ::libvpx_test::CodecTestWithParam<libvpx_test::TestMode> {
     22  protected:
     23   KeyframeTest() : EncoderTest(GET_PARAM(0)) {}
     24   virtual ~KeyframeTest() {}
     25 
     26   virtual void SetUp() {
     27     InitializeConfig();
     28     SetMode(GET_PARAM(1));
     29     kf_count_ = 0;
     30     kf_count_max_ = INT_MAX;
     31     kf_do_force_kf_ = false;
     32     set_cpu_used_ = 0;
     33   }
     34 
     35   virtual void PreEncodeFrameHook(::libvpx_test::VideoSource *video,
     36                                   ::libvpx_test::Encoder *encoder) {
     37     if (kf_do_force_kf_)
     38       frame_flags_ = (video->frame() % 3) ? 0 : VPX_EFLAG_FORCE_KF;
     39     if (set_cpu_used_ && video->frame() == 1)
     40       encoder->Control(VP8E_SET_CPUUSED, set_cpu_used_);
     41   }
     42 
     43   virtual void FramePktHook(const vpx_codec_cx_pkt_t *pkt) {
     44     if (pkt->data.frame.flags & VPX_FRAME_IS_KEY) {
     45       kf_pts_list_.push_back(pkt->data.frame.pts);
     46       kf_count_++;
     47       abort_ |= kf_count_ > kf_count_max_;
     48     }
     49   }
     50 
     51   bool kf_do_force_kf_;
     52   int kf_count_;
     53   int kf_count_max_;
     54   std::vector<vpx_codec_pts_t> kf_pts_list_;
     55   int set_cpu_used_;
     56 };
     57 
     58 TEST_P(KeyframeTest, TestRandomVideoSource) {
     59   // Validate that encoding the RandomVideoSource produces multiple keyframes.
     60   // This validates the results of the TestDisableKeyframes test.
     61   kf_count_max_ = 2;  // early exit successful tests.
     62 
     63   ::libvpx_test::RandomVideoSource video;
     64   ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
     65 
     66   // In realtime mode - auto placed keyframes are exceedingly rare,  don't
     67   // bother with this check   if(GetParam() > 0)
     68   if (GET_PARAM(1) > 0)
     69     EXPECT_GT(kf_count_, 1);
     70 }
     71 
     72 TEST_P(KeyframeTest, TestDisableKeyframes) {
     73   cfg_.kf_mode = VPX_KF_DISABLED;
     74   kf_count_max_ = 1;  // early exit failed tests.
     75 
     76   ::libvpx_test::RandomVideoSource video;
     77   ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
     78 
     79   EXPECT_EQ(1, kf_count_);
     80 }
     81 
     82 TEST_P(KeyframeTest, TestForceKeyframe) {
     83   cfg_.kf_mode = VPX_KF_DISABLED;
     84   kf_do_force_kf_ = true;
     85 
     86   ::libvpx_test::DummyVideoSource video;
     87   ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
     88 
     89   // verify that every third frame is a keyframe.
     90   for (std::vector<vpx_codec_pts_t>::const_iterator iter = kf_pts_list_.begin();
     91        iter != kf_pts_list_.end(); ++iter) {
     92     ASSERT_EQ(0, *iter % 3) << "Unexpected keyframe at frame " << *iter;
     93   }
     94 }
     95 
     96 TEST_P(KeyframeTest, TestKeyframeMaxDistance) {
     97   cfg_.kf_max_dist = 25;
     98 
     99   ::libvpx_test::DummyVideoSource video;
    100   ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
    101 
    102   // verify that keyframe interval matches kf_max_dist
    103   for (std::vector<vpx_codec_pts_t>::const_iterator iter = kf_pts_list_.begin();
    104        iter != kf_pts_list_.end(); ++iter) {
    105     ASSERT_EQ(0, *iter % 25) << "Unexpected keyframe at frame " << *iter;
    106   }
    107 }
    108 
    109 TEST_P(KeyframeTest, TestAutoKeyframe) {
    110   cfg_.kf_mode = VPX_KF_AUTO;
    111   kf_do_force_kf_ = false;
    112 
    113   // Force a deterministic speed step in Real Time mode, as the faster modes
    114   // may not produce a keyframe like we expect. This is necessary when running
    115   // on very slow environments (like Valgrind). The step -11 was determined
    116   // experimentally as the fastest mode that still throws the keyframe.
    117   if (deadline_ == VPX_DL_REALTIME)
    118     set_cpu_used_ = -11;
    119 
    120   // This clip has a cut scene every 30 frames -> Frame 0, 30, 60, 90, 120.
    121   // I check only the first 40 frames to make sure there's a keyframe at frame
    122   // 0 and 30.
    123   ::libvpx_test::I420VideoSource video("hantro_collage_w352h288.yuv", 352, 288,
    124                                        30, 1, 0, 40);
    125 
    126   ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
    127 
    128   // In realtime mode - auto placed keyframes are exceedingly rare,  don't
    129   // bother with this check
    130   if (GET_PARAM(1) > 0)
    131     EXPECT_EQ(2u, kf_pts_list_.size()) << " Not the right number of keyframes ";
    132 
    133   // Verify that keyframes match the file keyframes in the file.
    134   for (std::vector<vpx_codec_pts_t>::const_iterator iter = kf_pts_list_.begin();
    135        iter != kf_pts_list_.end(); ++iter) {
    136     if (deadline_ == VPX_DL_REALTIME && *iter > 0)
    137       EXPECT_EQ(0, (*iter - 1) % 30) << "Unexpected keyframe at frame "
    138         << *iter;
    139     else
    140       EXPECT_EQ(0, *iter % 30) << "Unexpected keyframe at frame " << *iter;
    141   }
    142 }
    143 
    144 VP8_INSTANTIATE_TEST_CASE(KeyframeTest, ALL_TEST_MODES);
    145 }  // namespace
    146