1/* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19#ifndef AVCODEC_ATSC_A53_H 20#define AVCODEC_ATSC_A53_H 21 22#include <stddef.h> 23#include <stdint.h> 24 25#include "libavutil/buffer.h" 26#include "libavutil/frame.h" 27 28/** 29 * Check AVFrame for A53 side data and allocate and fill SEI message with A53 info 30 * 31 * @param frame Raw frame to get A53 side data from 32 * @param prefix_len Number of bytes to allocate before SEI message 33 * @param data Pointer to a variable to store allocated memory 34 * Upon return the variable will hold NULL on error or if frame has no A53 info. 35 * Otherwise it will point to prefix_len uninitialized bytes followed by 36 * *sei_size SEI message 37 * @param sei_size Pointer to a variable to store generated SEI message length 38 * @return Zero on success, negative error code on failure 39 */ 40int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len, 41 void **data, size_t *sei_size); 42 43/** 44 * Parse a data array for ATSC A53 Part 4 Closed Captions and store them in an AVBufferRef. 45 * 46 * @param pbuf Pointer to an AVBufferRef to append the closed captions. *pbuf may be NULL, in 47 * which case a new buffer will be allocated and put in it. 48 * @param data The data array containing the raw A53 data. 49 * @param size Size of the data array in bytes. 50 * 51 * @return Number of closed captions parsed on success, negative error code on failure. 52 * If no Closed Captions are parsed, *pbuf is untouched. 53 */ 54int ff_parse_a53_cc(AVBufferRef **pbuf, const uint8_t *data, int size); 55 56#endif /* AVCODEC_ATSC_A53_H */ 57