avcodec: split off A53 Closed Caption parsing code into its own file

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/libavcodec/atsc_a53.h b/libavcodec/atsc_a53.h
new file mode 100644
index 0000000000..a419d801b9
--- /dev/null
+++ b/libavcodec/atsc_a53.h
@@ -0,0 +1,39 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_ATSC_A53_H
+#define AVCODEC_ATSC_A53_H
+
+#include <stdint.h>
+
+#include "libavutil/buffer.h"
+
+/**
+ * Parse a data array for ATSC A53 Part 4 Closed Captions and store them in an AVBufferRef.
+ *
+ * @param pbuf Pointer to an AVBufferRef to append the closed captions. *pbuf may be NULL, in
+ *             which case a new buffer will be allocated and put in it.
+ * @param data The data array containing the raw A53 data.
+ * @param size Size of the data array in bytes.
+ *
+ * @return Number of closed captions parsed on success, negative error code on failure.
+ *         If no Closed Captions are parsed, *pbuf is untouched.
+ */
+int ff_parse_a53_cc(AVBufferRef **pbuf, const uint8_t *data, int size);
+
+#endif /* AVCODEC_ATSC_A53_H */