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-rw-r--r--media/libaom/src/common/obudec.h48
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diff --git a/media/libaom/src/common/obudec.h b/media/libaom/src/common/obudec.h
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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.
+ */
+#ifndef AOM_COMMON_OBUDEC_H_
+#define AOM_COMMON_OBUDEC_H_
+
+#include "common/tools_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct ObuDecInputContext {
+ struct AvxInputContext *avx_ctx;
+ uint8_t *buffer;
+ size_t buffer_capacity;
+ size_t bytes_buffered;
+ int is_annexb;
+};
+
+// Returns 1 when file data starts (if Annex B stream, after reading the
+// size of the OBU) with what appears to be a Temporal Delimiter
+// OBU as defined by Section 5 of the AV1 bitstream specification.
+int file_is_obu(struct ObuDecInputContext *obu_ctx);
+
+// Reads one Temporal Unit from the input file. Returns 0 when a TU is
+// successfully read, 1 when end of file is reached, and less than 0 when an
+// error occurs. Stores TU data in 'buffer'. Reallocs buffer to match TU size,
+// returns buffer capacity via 'buffer_size', and returns size of buffered data
+// via 'bytes_read'.
+int obudec_read_temporal_unit(struct ObuDecInputContext *obu_ctx,
+ uint8_t **buffer, size_t *bytes_read,
+ size_t *buffer_size);
+
+void obudec_free(struct ObuDecInputContext *obu_ctx);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif // AOM_COMMON_OBUDEC_H_