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diff --git a/third_party/aom/test/encode_test_driver.h b/third_party/aom/test/encode_test_driver.h
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+++ b/third_party/aom/test/encode_test_driver.h
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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.
+ */
+#ifndef TEST_ENCODE_TEST_DRIVER_H_
+#define TEST_ENCODE_TEST_DRIVER_H_
+
+#include <string>
+#include <vector>
+
+#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
+
+#include "./aom_config.h"
+#if CONFIG_AV1_ENCODER
+#include "aom/aomcx.h"
+#endif
+#include "aom/aom_encoder.h"
+
+namespace libaom_test {
+
+class CodecFactory;
+class VideoSource;
+
+enum TestMode { kRealTime, kOnePassGood, kTwoPassGood };
+#define ALL_TEST_MODES                                                     \
+  ::testing::Values(::libaom_test::kRealTime, ::libaom_test::kOnePassGood, \
+                    ::libaom_test::kTwoPassGood)
+
+#define ONE_PASS_TEST_MODES \
+  ::testing::Values(::libaom_test::kRealTime, ::libaom_test::kOnePassGood)
+
+#define TWO_PASS_TEST_MODES ::testing::Values(::libaom_test::kTwoPassGood)
+
+// Provides an object to handle the libaom get_cx_data() iteration pattern
+class CxDataIterator {
+ public:
+  explicit CxDataIterator(aom_codec_ctx_t *encoder)
+      : encoder_(encoder), iter_(NULL) {}
+
+  const aom_codec_cx_pkt_t *Next() {
+    return aom_codec_get_cx_data(encoder_, &iter_);
+  }
+
+ private:
+  aom_codec_ctx_t *encoder_;
+  aom_codec_iter_t iter_;
+};
+
+// Implements an in-memory store for libaom twopass statistics
+class TwopassStatsStore {
+ public:
+  void Append(const aom_codec_cx_pkt_t &pkt) {
+    buffer_.append(reinterpret_cast<char *>(pkt.data.twopass_stats.buf),
+                   pkt.data.twopass_stats.sz);
+  }
+
+  aom_fixed_buf_t buf() {
+    const aom_fixed_buf_t buf = { &buffer_[0], buffer_.size() };
+    return buf;
+  }
+
+  void Reset() { buffer_.clear(); }
+
+ protected:
+  std::string buffer_;
+};
+
+// Provides a simplified interface to manage one video encoding pass, given
+// a configuration and video source.
+//
+// TODO(jkoleszar): The exact services it provides and the appropriate
+// level of abstraction will be fleshed out as more tests are written.
+class Encoder {
+ public:
+  Encoder(aom_codec_enc_cfg_t cfg, unsigned long deadline,
+          const unsigned long init_flags, TwopassStatsStore *stats)
+      : cfg_(cfg), deadline_(deadline), init_flags_(init_flags), stats_(stats) {
+    memset(&encoder_, 0, sizeof(encoder_));
+  }
+
+  virtual ~Encoder() { aom_codec_destroy(&encoder_); }
+
+  CxDataIterator GetCxData() { return CxDataIterator(&encoder_); }
+
+  void InitEncoder(VideoSource *video);
+
+  const aom_image_t *GetPreviewFrame() {
+    return aom_codec_get_preview_frame(&encoder_);
+  }
+  // This is a thin wrapper around aom_codec_encode(), so refer to
+  // aom_encoder.h for its semantics.
+  void EncodeFrame(VideoSource *video, const unsigned long frame_flags);
+
+  // Convenience wrapper for EncodeFrame()
+  void EncodeFrame(VideoSource *video) { EncodeFrame(video, 0); }
+
+  void Control(int ctrl_id, int arg) {
+    const aom_codec_err_t res = aom_codec_control_(&encoder_, ctrl_id, arg);
+    ASSERT_EQ(AOM_CODEC_OK, res) << EncoderError();
+  }
+
+  void Control(int ctrl_id, int *arg) {
+    const aom_codec_err_t res = aom_codec_control_(&encoder_, ctrl_id, arg);
+    ASSERT_EQ(AOM_CODEC_OK, res) << EncoderError();
+  }
+
+  void Control(int ctrl_id, struct aom_scaling_mode *arg) {
+    const aom_codec_err_t res = aom_codec_control_(&encoder_, ctrl_id, arg);
+    ASSERT_EQ(AOM_CODEC_OK, res) << EncoderError();
+  }
+
+#if CONFIG_AV1_ENCODER
+  void Control(int ctrl_id, aom_active_map_t *arg) {
+    const aom_codec_err_t res = aom_codec_control_(&encoder_, ctrl_id, arg);
+    ASSERT_EQ(AOM_CODEC_OK, res) << EncoderError();
+  }
+#endif
+
+  void Config(const aom_codec_enc_cfg_t *cfg) {
+    const aom_codec_err_t res = aom_codec_enc_config_set(&encoder_, cfg);
+    ASSERT_EQ(AOM_CODEC_OK, res) << EncoderError();
+    cfg_ = *cfg;
+  }
+
+  void set_deadline(unsigned long deadline) { deadline_ = deadline; }
+
+ protected:
+  virtual aom_codec_iface_t *CodecInterface() const = 0;
+
+  const char *EncoderError() {
+    const char *detail = aom_codec_error_detail(&encoder_);
+    return detail ? detail : aom_codec_error(&encoder_);
+  }
+
+  // Encode an image
+  void EncodeFrameInternal(const VideoSource &video,
+                           const unsigned long frame_flags);
+
+  // Flush the encoder on EOS
+  void Flush();
+
+  aom_codec_ctx_t encoder_;
+  aom_codec_enc_cfg_t cfg_;
+  unsigned long deadline_;
+  unsigned long init_flags_;
+  TwopassStatsStore *stats_;
+};
+
+// Common test functionality for all Encoder tests.
+//
+// This class is a mixin which provides the main loop common to all
+// encoder tests. It provides hooks which can be overridden by subclasses
+// to implement each test's specific behavior, while centralizing the bulk
+// of the boilerplate. Note that it doesn't inherit the gtest testing
+// classes directly, so that tests can be parameterized differently.
+class EncoderTest {
+ protected:
+  explicit EncoderTest(const CodecFactory *codec)
+      : codec_(codec), abort_(false), init_flags_(0), frame_flags_(0),
+        last_pts_(0), mode_(kRealTime) {
+    // Default to 1 thread.
+    cfg_.g_threads = 1;
+  }
+
+  virtual ~EncoderTest() {}
+
+  // Initialize the cfg_ member with the default configuration.
+  void InitializeConfig();
+
+  // Map the TestMode enum to the deadline_ and passes_ variables.
+  void SetMode(TestMode mode);
+
+  // Set encoder flag.
+  void set_init_flags(unsigned long flag) {  // NOLINT(runtime/int)
+    init_flags_ = flag;
+  }
+
+  // Main loop
+  virtual void RunLoop(VideoSource *video);
+
+  // Hook to be called at the beginning of a pass.
+  virtual void BeginPassHook(unsigned int /*pass*/) {}
+
+  // Hook to be called at the end of a pass.
+  virtual void EndPassHook() {}
+
+  // Hook to be called before encoding a frame.
+  virtual void PreEncodeFrameHook(VideoSource * /*video*/) {}
+  virtual void PreEncodeFrameHook(VideoSource * /*video*/,
+                                  Encoder * /*encoder*/) {}
+
+  // Hook to be called on every compressed data packet.
+  virtual void FramePktHook(const aom_codec_cx_pkt_t * /*pkt*/) {}
+
+  // Hook to be called on every PSNR packet.
+  virtual void PSNRPktHook(const aom_codec_cx_pkt_t * /*pkt*/) {}
+
+  // Hook to determine whether the encode loop should continue.
+  virtual bool Continue() const {
+    return !(::testing::Test::HasFatalFailure() || abort_);
+  }
+
+  const CodecFactory *codec_;
+  // Hook to determine whether to decode frame after encoding
+  virtual bool DoDecode() const { return 1; }
+
+  // Hook to handle encode/decode mismatch
+  virtual void MismatchHook(const aom_image_t *img1, const aom_image_t *img2);
+
+  // Hook to be called on every decompressed frame.
+  virtual void DecompressedFrameHook(const aom_image_t & /*img*/,
+                                     aom_codec_pts_t /*pts*/) {}
+
+  // Hook to be called to handle decode result. Return true to continue.
+  virtual bool HandleDecodeResult(const aom_codec_err_t res_dec,
+                                  Decoder *decoder) {
+    EXPECT_EQ(AOM_CODEC_OK, res_dec) << decoder->DecodeError();
+    return AOM_CODEC_OK == res_dec;
+  }
+
+  // Hook that can modify the encoder's output data
+  virtual const aom_codec_cx_pkt_t *MutateEncoderOutputHook(
+      const aom_codec_cx_pkt_t *pkt) {
+    return pkt;
+  }
+
+  bool abort_;
+  aom_codec_enc_cfg_t cfg_;
+  aom_codec_dec_cfg_t dec_cfg_;
+  unsigned int passes_;
+  unsigned long deadline_;
+  TwopassStatsStore stats_;
+  unsigned long init_flags_;
+  unsigned long frame_flags_;
+  aom_codec_pts_t last_pts_;
+  TestMode mode_;
+};
+
+}  // namespace libaom_test
+
+#endif  // TEST_ENCODE_TEST_DRIVER_H_