#ifndef AVCODEC_ATSC_A53_H
#define AVCODEC_ATSC_A53_H
+#include <stddef.h>
#include <stdint.h>
#include "libavutil/buffer.h"
+#include "libavutil/frame.h"
+
+/**
+ * Check AVFrame for A53 side data and allocate and fill SEI message with A53 info
+ *
+ * @param frame Raw frame to get A53 side data from
+ * @param prefix_len Number of bytes to allocate before SEI message
+ * @param data Pointer to a variable to store allocated memory
+ * Upon return the variable will hold NULL on error or if frame has no A53 info.
+ * Otherwise it will point to prefix_len uninitialized bytes followed by
+ * *sei_size SEI message
+ * @param sei_size Pointer to a variable to store generated SEI message length
+ * @return Zero on success, negative error code on failure
+ */
+int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len,
+ void **data, size_t *sei_size);
/**
* Parse a data array for ATSC A53 Part 4 Closed Captions and store them in an AVBufferRef.