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diff --git a/third_party/aom/examples/lightfield_decoder.c b/third_party/aom/examples/lightfield_decoder.c
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+++ b/third_party/aom/examples/lightfield_decoder.c
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+/*
+ * Copyright (c) 2017, 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.
+ */
+
+// Lightfield Decoder
+// ==================
+//
+// This is an example of a simple lightfield decoder. It builds upon the
+// simple_decoder.c example.  It takes an input file containing the compressed
+// data (in ivf format), treating it as a lightfield instead of a video.
+// After running the lightfield encoder, run lightfield decoder to decode a
+// batch of tiles:
+// examples/lightfield_decoder vase10x10.ivf vase_reference.yuv 4
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "aom/aom_decoder.h"
+#include "aom/aomdx.h"
+#include "aom_scale/yv12config.h"
+#include "av1/common/enums.h"
+#include "common/tools_common.h"
+#include "common/video_reader.h"
+
+static const char *exec_name;
+
+void usage_exit(void) {
+  fprintf(stderr, "Usage: %s <infile> <outfile> <num_references>\n", exec_name);
+  exit(EXIT_FAILURE);
+}
+
+// Tile list entry provided by the application
+typedef struct {
+  int image_idx;
+  int reference_idx;
+  int tile_col;
+  int tile_row;
+} TILE_LIST_INFO;
+
+// M references: 0 - M-1; N images(including references): 0 - N-1;
+// Note: order the image index incrementally, so that we only go through the
+// bitstream once to construct the tile list.
+const int num_tile_lists = 2;
+const uint16_t tile_count_minus_1 = 9 - 1;
+const TILE_LIST_INFO tile_list[2][9] = {
+  { { 16, 0, 4, 5 },
+    { 83, 3, 13, 2 },
+    { 57, 2, 2, 6 },
+    { 31, 1, 11, 5 },
+    { 2, 0, 7, 4 },
+    { 77, 3, 9, 9 },
+    { 49, 1, 0, 1 },
+    { 6, 0, 3, 10 },
+    { 63, 2, 5, 8 } },
+  { { 65, 2, 11, 1 },
+    { 42, 1, 3, 7 },
+    { 88, 3, 8, 4 },
+    { 76, 3, 1, 15 },
+    { 1, 0, 2, 2 },
+    { 19, 0, 5, 6 },
+    { 60, 2, 4, 0 },
+    { 25, 1, 11, 15 },
+    { 50, 2, 5, 4 } },
+};
+
+int main(int argc, char **argv) {
+  FILE *outfile = NULL;
+  aom_codec_ctx_t codec;
+  AvxVideoReader *reader = NULL;
+  const AvxInterface *decoder = NULL;
+  const AvxVideoInfo *info = NULL;
+  int num_references;
+  aom_image_t reference_images[MAX_EXTERNAL_REFERENCES];
+  size_t frame_size = 0;
+  const unsigned char *frame = NULL;
+  int n, i, j;
+  exec_name = argv[0];
+
+  if (argc != 4) die("Invalid number of arguments.");
+
+  reader = aom_video_reader_open(argv[1]);
+  if (!reader) die("Failed to open %s for reading.", argv[1]);
+
+  if (!(outfile = fopen(argv[2], "wb")))
+    die("Failed to open %s for writing.", argv[2]);
+
+  num_references = (int)strtol(argv[3], NULL, 0);
+
+  info = aom_video_reader_get_info(reader);
+
+  decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
+  if (!decoder) die("Unknown input codec.");
+  printf("Using %s\n", aom_codec_iface_name(decoder->codec_interface()));
+
+  if (aom_codec_dec_init(&codec, decoder->codec_interface(), NULL, 0))
+    die_codec(&codec, "Failed to initialize decoder.");
+
+  if (aom_codec_control(&codec, AV1D_SET_IS_ANNEXB, info->is_annexb)) {
+    die("Failed to set annex b status");
+  }
+
+  // Decode anchor frames.
+  aom_codec_control_(&codec, AV1_SET_TILE_MODE, 0);
+  for (i = 0; i < num_references; ++i) {
+    aom_video_reader_read_frame(reader);
+    frame = aom_video_reader_get_frame(reader, &frame_size);
+    if (aom_codec_decode(&codec, frame, frame_size, NULL))
+      die_codec(&codec, "Failed to decode frame.");
+
+    if (i == 0) {
+      aom_img_fmt_t ref_fmt = 0;
+      if (aom_codec_control(&codec, AV1D_GET_IMG_FORMAT, &ref_fmt))
+        die_codec(&codec, "Failed to get the image format");
+
+      int frame_res[2];
+      if (aom_codec_control(&codec, AV1D_GET_FRAME_SIZE, frame_res))
+        die_codec(&codec, "Failed to get the image frame size");
+
+      // Allocate memory to store decoded references. Allocate memory with the
+      // border so that it can be used as a reference.
+      for (j = 0; j < num_references; j++) {
+        unsigned int border = AOM_BORDER_IN_PIXELS;
+        if (!aom_img_alloc_with_border(&reference_images[j], ref_fmt,
+                                       frame_res[0], frame_res[1], 32, 8,
+                                       border)) {
+          die("Failed to allocate references.");
+        }
+      }
+    }
+
+    if (aom_codec_control(&codec, AV1_COPY_NEW_FRAME_IMAGE,
+                          &reference_images[i]))
+      die_codec(&codec, "Failed to copy decoded reference frame");
+
+    aom_codec_iter_t iter = NULL;
+    aom_image_t *img = NULL;
+    while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) {
+      char name[1024];
+      snprintf(name, sizeof(name), "ref_%d.yuv", i);
+      printf("writing ref image to %s, %d, %d\n", name, img->d_w, img->d_h);
+      FILE *ref_file = fopen(name, "wb");
+      aom_img_write(img, ref_file);
+      fclose(ref_file);
+    }
+  }
+
+  FILE *infile = aom_video_reader_get_file(reader);
+  // Record the offset of the first camera image.
+  const FileOffset camera_frame_pos = ftello(infile);
+
+  // Process 1 tile.
+  for (n = 0; n < num_tile_lists; n++) {
+    for (i = 0; i <= tile_count_minus_1; i++) {
+      int image_idx = tile_list[n][i].image_idx;
+      int ref_idx = tile_list[n][i].reference_idx;
+      int tc = tile_list[n][i].tile_col;
+      int tr = tile_list[n][i].tile_row;
+      int frame_cnt = -1;
+
+      // Seek to the first camera image.
+      fseeko(infile, camera_frame_pos, SEEK_SET);
+
+      // Read out the camera image
+      while (frame_cnt != image_idx) {
+        aom_video_reader_read_frame(reader);
+        frame_cnt++;
+      }
+
+      frame = aom_video_reader_get_frame(reader, &frame_size);
+
+      aom_codec_control_(&codec, AV1_SET_TILE_MODE, 1);
+      aom_codec_control_(&codec, AV1D_EXT_TILE_DEBUG, 1);
+      aom_codec_control_(&codec, AV1_SET_DECODE_TILE_ROW, tr);
+      aom_codec_control_(&codec, AV1_SET_DECODE_TILE_COL, tc);
+
+      av1_ref_frame_t ref;
+      ref.idx = 0;
+      ref.use_external_ref = 1;
+      ref.img = reference_images[ref_idx];
+      if (aom_codec_control(&codec, AV1_SET_REFERENCE, &ref)) {
+        die_codec(&codec, "Failed to set reference frame.");
+      }
+
+      aom_codec_err_t aom_status =
+          aom_codec_decode(&codec, frame, frame_size, NULL);
+      if (aom_status) die_codec(&codec, "Failed to decode tile.");
+
+      aom_codec_iter_t iter = NULL;
+      aom_image_t *img = aom_codec_get_frame(&codec, &iter);
+      aom_img_write(img, outfile);
+    }
+  }
+
+  for (i = 0; i < num_references; i++) aom_img_free(&reference_images[i]);
+  if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
+  aom_video_reader_close(reader);
+  fclose(outfile);
+
+  return EXIT_SUCCESS;
+}