Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

third_party/aom/ivfenc.h

@@ -0,0 +1,34 @@
+/*
+ * 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 IVFENC_H_
+#define IVFENC_H_
+
+#include "./tools_common.h"
+
+struct aom_codec_enc_cfg;
+struct aom_codec_cx_pkt;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void ivf_write_file_header(FILE *outfile, const struct aom_codec_enc_cfg *cfg,
+                           uint32_t fourcc, int frame_cnt);
+
+void ivf_write_frame_header(FILE *outfile, int64_t pts, size_t frame_size);
+
+void ivf_write_frame_size(FILE *outfile, size_t frame_size);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif  // IVFENC_H_