1 files changed, 67 insertions, 0 deletions
diff --git a/third_party/aom/examples/av1_dec_fuzzer.cc b/third_party/aom/examples/av1_dec_fuzzer.cc
new file mode 100644
index 0000000000..9b9a0b9cb6
--- /dev/null
+++ b/third_party/aom/examples/av1_dec_fuzzer.cc
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2019, 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.
+ */
+
+/*
+ * See build_av1_dec_fuzzer.sh for building instructions.
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <algorithm>
+#include <memory>
+#include "config/aom_config.h"
+#include "aom/aom_decoder.h"
+#include "aom/aomdx.h"
+#include "aom_ports/mem_ops.h"
+
+#define IVF_FRAME_HDR_SZ (4 + 8) /* 4 byte size + 8 byte timestamp */
+#define IVF_FILE_HDR_SZ 32
+
+extern "C" void usage_exit(void) { exit(EXIT_FAILURE); }
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  if (size <= IVF_FILE_HDR_SZ) {
+    return 0;
+  }
+
+  aom_codec_iface_t *codec_interface = aom_codec_av1_dx();
+  aom_codec_ctx_t codec;
+  // Set thread count in the range [1, 64].
+  const unsigned int threads = (data[IVF_FILE_HDR_SZ] & 0x3f) + 1;
+  aom_codec_dec_cfg_t cfg = { threads, 0, 0, !FORCE_HIGHBITDEPTH_DECODING };
+  if (aom_codec_dec_init(&codec, codec_interface, &cfg, 0)) {
+    return 0;
+  }
+
+  data += IVF_FILE_HDR_SZ;
+  size -= IVF_FILE_HDR_SZ;
+
+  while (size > IVF_FRAME_HDR_SZ) {
+    size_t frame_size = mem_get_le32(data);
+    size -= IVF_FRAME_HDR_SZ;
+    data += IVF_FRAME_HDR_SZ;
+    frame_size = std::min(size, frame_size);
+
+    const aom_codec_err_t err =
+        aom_codec_decode(&codec, data, frame_size, nullptr);
+    static_cast<void>(err);
+    aom_codec_iter_t iter = nullptr;
+    aom_image_t *img = nullptr;
+    while ((img = aom_codec_get_frame(&codec, &iter)) != nullptr) {
+    }
+    data += frame_size;
+    size -= frame_size;
+  }
+  aom_codec_destroy(&codec);
+  return 0;
+}