Add fuzzer test for various media parsers

media/filters/vp9_parser_fuzzertest.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "base/numerics/safe_conversions.h"
+#include "media/filters/ivf_parser.h"
+#include "media/filters/vp9_parser.h"
+
+// Entry point for LibFuzzer.
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  const uint8_t* ivf_payload = nullptr;
+  media::IvfParser ivf_parser;
+  media::IvfFileHeader ivf_file_header;
+  media::IvfFrameHeader ivf_frame_header;
+
+  if (!ivf_parser.Initialize(data, size, &ivf_file_header))
+    return 0;
+  if (ivf_file_header.fourcc != 0x30395056u)  // VP90
+    return 0;
+
+  // Parse until the end of stream/unsupported stream/error in stream is found.
+  while (ivf_parser.ParseNextFrame(&ivf_frame_header, &ivf_payload)) {
+    media::Vp9Parser vp9_parser;
+    media::Vp9FrameHeader vp9_frame_header;
+    vp9_parser.SetStream(ivf_payload, ivf_frame_header.frame_size);
+    while (vp9_parser.ParseNextFrame(&vp9_frame_header) ==
+           media::Vp9Parser::kOk) {
+      // Repeat until all frames processed.
+    }
+  }
+
+  return 0;
+}