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diff --git a/third_party/aom/test/yuv_video_source.h b/third_party/aom/test/yuv_video_source.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 AOM_TEST_YUV_VIDEO_SOURCE_H_
+#define AOM_TEST_YUV_VIDEO_SOURCE_H_
+
+#include <cstdio>
+#include <cstdlib>
+#include <string>
+
+#include "test/video_source.h"
+#include "aom/aom_image.h"
+
+namespace libaom_test {
+
+// This class extends VideoSource to allow parsing of raw YUV
+// formats of various color sampling and bit-depths so that we can
+// do actual file encodes.
+class YUVVideoSource : public VideoSource {
+ public:
+  YUVVideoSource(const std::string &file_name, aom_img_fmt format,
+                 unsigned int width, unsigned int height, int rate_numerator,
+                 int rate_denominator, unsigned int start, int limit)
+      : file_name_(file_name), input_file_(NULL), img_(NULL), start_(start),
+        limit_(limit), frame_(0), width_(0), height_(0),
+        format_(AOM_IMG_FMT_NONE), framerate_numerator_(rate_numerator),
+        framerate_denominator_(rate_denominator) {
+    // This initializes format_, raw_size_, width_, height_ and allocates img.
+    SetSize(width, height, format);
+  }
+
+  virtual ~YUVVideoSource() {
+    aom_img_free(img_);
+    if (input_file_) fclose(input_file_);
+  }
+
+  virtual void Begin() {
+    if (input_file_) fclose(input_file_);
+    input_file_ = OpenTestDataFile(file_name_);
+    ASSERT_TRUE(input_file_ != NULL)
+        << "Input file open failed. Filename: " << file_name_;
+    if (start_)
+      fseek(input_file_, static_cast<unsigned>(raw_size_) * start_, SEEK_SET);
+
+    frame_ = start_;
+    FillFrame();
+  }
+
+  virtual void Next() {
+    ++frame_;
+    FillFrame();
+  }
+
+  virtual aom_image_t *img() const { return (frame_ < limit_) ? img_ : NULL; }
+
+  // Models a stream where Timebase = 1/FPS, so pts == frame.
+  virtual aom_codec_pts_t pts() const { return frame_; }
+
+  virtual unsigned long duration() const { return 1; }
+
+  virtual aom_rational_t timebase() const {
+    const aom_rational_t t = { framerate_denominator_, framerate_numerator_ };
+    return t;
+  }
+
+  virtual unsigned int frame() const { return frame_; }
+
+  virtual unsigned int limit() const { return limit_; }
+
+  virtual void SetSize(unsigned int width, unsigned int height,
+                       aom_img_fmt format) {
+    if (width != width_ || height != height_ || format != format_) {
+      aom_img_free(img_);
+      img_ = aom_img_alloc(NULL, format, width, height, 1);
+      ASSERT_TRUE(img_ != NULL);
+      width_ = width;
+      height_ = height;
+      format_ = format;
+      switch (format) {
+        case AOM_IMG_FMT_I420: raw_size_ = width * height * 3 / 2; break;
+        case AOM_IMG_FMT_I422: raw_size_ = width * height * 2; break;
+        case AOM_IMG_FMT_I444: raw_size_ = width * height * 3; break;
+        case AOM_IMG_FMT_I42016: raw_size_ = width * height * 3; break;
+        case AOM_IMG_FMT_I42216: raw_size_ = width * height * 4; break;
+        case AOM_IMG_FMT_I44416: raw_size_ = width * height * 6; break;
+        default: ASSERT_TRUE(0);
+      }
+    }
+  }
+
+  virtual void FillFrame() {
+    ASSERT_TRUE(input_file_ != NULL);
+    // Read a frame from input_file.
+    if (fread(img_->img_data, raw_size_, 1, input_file_) == 0) {
+      limit_ = frame_;
+    }
+  }
+
+ protected:
+  std::string file_name_;
+  FILE *input_file_;
+  aom_image_t *img_;
+  size_t raw_size_;
+  unsigned int start_;
+  unsigned int limit_;
+  unsigned int frame_;
+  unsigned int width_;
+  unsigned int height_;
+  aom_img_fmt format_;
+  int framerate_numerator_;
+  int framerate_denominator_;
+};
+
+}  // namespace libaom_test
+
+#endif  // AOM_TEST_YUV_VIDEO_SOURCE_H_