Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 235 insertions, 0 deletions

diff --git a/third_party/aom/test/error_resilience_test.cc b/third_party/aom/test/error_resilience_test.cc
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+++ b/third_party/aom/test/error_resilience_test.cc
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+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+*/
+
+#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
+#include "test/codec_factory.h"
+#include "test/encode_test_driver.h"
+#include "test/i420_video_source.h"
+#include "test/util.h"
+
+namespace {
+
+const int kMaxErrorFrames = 12;
+const int kMaxDroppableFrames = 12;
+
+class ErrorResilienceTestLarge
+    : public ::libaom_test::EncoderTest,
+      public ::libaom_test::CodecTestWithParam<libaom_test::TestMode> {
+ protected:
+  ErrorResilienceTestLarge()
+      : EncoderTest(GET_PARAM(0)), psnr_(0.0), nframes_(0), mismatch_psnr_(0.0),
+        mismatch_nframes_(0), encoding_mode_(GET_PARAM(1)) {
+    Reset();
+  }
+
+  virtual ~ErrorResilienceTestLarge() {}
+
+  void Reset() {
+    error_nframes_ = 0;
+    droppable_nframes_ = 0;
+    pattern_switch_ = 0;
+  }
+
+  virtual void SetUp() {
+    InitializeConfig();
+    SetMode(encoding_mode_);
+  }
+
+  virtual void BeginPassHook(unsigned int /*pass*/) {
+    psnr_ = 0.0;
+    nframes_ = 0;
+    mismatch_psnr_ = 0.0;
+    mismatch_nframes_ = 0;
+  }
+
+  virtual void PSNRPktHook(const aom_codec_cx_pkt_t *pkt) {
+    psnr_ += pkt->data.psnr.psnr[0];
+    nframes_++;
+  }
+
+  virtual void PreEncodeFrameHook(libaom_test::VideoSource *video) {
+    frame_flags_ &=
+        ~(AOM_EFLAG_NO_UPD_LAST | AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF);
+    if (droppable_nframes_ > 0 &&
+        (cfg_.g_pass == AOM_RC_LAST_PASS || cfg_.g_pass == AOM_RC_ONE_PASS)) {
+      for (unsigned int i = 0; i < droppable_nframes_; ++i) {
+        if (droppable_frames_[i] == video->frame()) {
+          std::cout << "Encoding droppable frame: " << droppable_frames_[i]
+                    << "\n";
+          frame_flags_ |= (AOM_EFLAG_NO_UPD_LAST | AOM_EFLAG_NO_UPD_GF |
+                           AOM_EFLAG_NO_UPD_ARF);
+          return;
+        }
+      }
+    }
+  }
+
+  double GetAveragePsnr() const {
+    if (nframes_) return psnr_ / nframes_;
+    return 0.0;
+  }
+
+  double GetAverageMismatchPsnr() const {
+    if (mismatch_nframes_) return mismatch_psnr_ / mismatch_nframes_;
+    return 0.0;
+  }
+
+  virtual bool DoDecode() const {
+    if (error_nframes_ > 0 &&
+        (cfg_.g_pass == AOM_RC_LAST_PASS || cfg_.g_pass == AOM_RC_ONE_PASS)) {
+      for (unsigned int i = 0; i < error_nframes_; ++i) {
+        if (error_frames_[i] == nframes_ - 1) {
+          std::cout << "             Skipping decoding frame: "
+                    << error_frames_[i] << "\n";
+          return 0;
+        }
+      }
+    }
+    return 1;
+  }
+
+  virtual void MismatchHook(const aom_image_t *img1, const aom_image_t *img2) {
+    double mismatch_psnr = compute_psnr(img1, img2);
+    mismatch_psnr_ += mismatch_psnr;
+    ++mismatch_nframes_;
+    // std::cout << "Mismatch frame psnr: " << mismatch_psnr << "\n";
+    ::libaom_test::EncoderTest::MismatchHook(img1, img2);
+  }
+
+  void SetErrorFrames(int num, unsigned int *list) {
+    if (num > kMaxErrorFrames)
+      num = kMaxErrorFrames;
+    else if (num < 0)
+      num = 0;
+    error_nframes_ = num;
+    for (unsigned int i = 0; i < error_nframes_; ++i)
+      error_frames_[i] = list[i];
+  }
+
+  void SetDroppableFrames(int num, unsigned int *list) {
+    if (num > kMaxDroppableFrames)
+      num = kMaxDroppableFrames;
+    else if (num < 0)
+      num = 0;
+    droppable_nframes_ = num;
+    for (unsigned int i = 0; i < droppable_nframes_; ++i)
+      droppable_frames_[i] = list[i];
+  }
+
+  unsigned int GetMismatchFrames() { return mismatch_nframes_; }
+
+  void SetPatternSwitch(int frame_switch) { pattern_switch_ = frame_switch; }
+
+ private:
+  double psnr_;
+  unsigned int nframes_;
+  unsigned int error_nframes_;
+  unsigned int droppable_nframes_;
+  unsigned int pattern_switch_;
+  double mismatch_psnr_;
+  unsigned int mismatch_nframes_;
+  unsigned int error_frames_[kMaxErrorFrames];
+  unsigned int droppable_frames_[kMaxDroppableFrames];
+  libaom_test::TestMode encoding_mode_;
+};
+
+TEST_P(ErrorResilienceTestLarge, OnVersusOff) {
+  const aom_rational timebase = { 33333333, 1000000000 };
+  cfg_.g_timebase = timebase;
+  cfg_.rc_target_bitrate = 2000;
+  cfg_.g_lag_in_frames = 10;
+
+  init_flags_ = AOM_CODEC_USE_PSNR;
+
+  libaom_test::I420VideoSource video("hantro_collage_w352h288.yuv", 352, 288,
+                                     timebase.den, timebase.num, 0, 30);
+
+  // Error resilient mode OFF.
+  cfg_.g_error_resilient = 0;
+  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+  const double psnr_resilience_off = GetAveragePsnr();
+  EXPECT_GT(psnr_resilience_off, 25.0);
+
+  // Error resilient mode ON.
+  cfg_.g_error_resilient = 1;
+  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+  const double psnr_resilience_on = GetAveragePsnr();
+  EXPECT_GT(psnr_resilience_on, 25.0);
+
+  // Test that turning on error resilient mode hurts by 10% at most.
+  if (psnr_resilience_off > 0.0) {
+    const double psnr_ratio = psnr_resilience_on / psnr_resilience_off;
+    EXPECT_GE(psnr_ratio, 0.9);
+    EXPECT_LE(psnr_ratio, 1.1);
+  }
+}
+
+// Check for successful decoding and no encoder/decoder mismatch
+// if we lose (i.e., drop before decoding) a set of droppable
+// frames (i.e., frames that don't update any reference buffers).
+// Check both isolated and consecutive loss.
+TEST_P(ErrorResilienceTestLarge, DropFramesWithoutRecovery) {
+  const aom_rational timebase = { 33333333, 1000000000 };
+  cfg_.g_timebase = timebase;
+  cfg_.rc_target_bitrate = 500;
+  // FIXME(debargha): Fix this to work for any lag.
+  // Currently this test only works for lag = 0
+  cfg_.g_lag_in_frames = 0;
+
+  init_flags_ = AOM_CODEC_USE_PSNR;
+
+  libaom_test::I420VideoSource video("hantro_collage_w352h288.yuv", 352, 288,
+                                     timebase.den, timebase.num, 0, 40);
+
+  // Error resilient mode ON.
+  cfg_.g_error_resilient = 1;
+  cfg_.kf_mode = AOM_KF_DISABLED;
+
+  // Set an arbitrary set of error frames same as droppable frames.
+  // In addition to isolated loss/drop, add a long consecutive series
+  // (of size 9) of dropped frames.
+  unsigned int num_droppable_frames = 11;
+  unsigned int droppable_frame_list[] = { 5,  16, 22, 23, 24, 25,
+                                          26, 27, 28, 29, 30 };
+  SetDroppableFrames(num_droppable_frames, droppable_frame_list);
+  SetErrorFrames(num_droppable_frames, droppable_frame_list);
+  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+  // Test that no mismatches have been found
+  std::cout << "             Mismatch frames: " << GetMismatchFrames() << "\n";
+  EXPECT_EQ(GetMismatchFrames(), (unsigned int)0);
+
+  // Reset previously set of error/droppable frames.
+  Reset();
+
+#if 0
+  // TODO(jkoleszar): This test is disabled for the time being as too
+  // sensitive. It's not clear how to set a reasonable threshold for
+  // this behavior.
+
+  // Now set an arbitrary set of error frames that are non-droppable
+  unsigned int num_error_frames = 3;
+  unsigned int error_frame_list[] = {3, 10, 20};
+  SetErrorFrames(num_error_frames, error_frame_list);
+  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+
+  // Test that dropping an arbitrary set of inter frames does not hurt too much
+  // Note the Average Mismatch PSNR is the average of the PSNR between
+  // decoded frame and encoder's version of the same frame for all frames
+  // with mismatch.
+  const double psnr_resilience_mismatch = GetAverageMismatchPsnr();
+  std::cout << "             Mismatch PSNR: "
+            << psnr_resilience_mismatch << "\n";
+  EXPECT_GT(psnr_resilience_mismatch, 20.0);
+#endif
+}
+
+AV1_INSTANTIATE_TEST_CASE(ErrorResilienceTestLarge, ONE_PASS_TEST_MODES);
+}  // namespace