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https://gitee.com/openharmony/third_party_ffmpeg
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57 lines
2.3 KiB
C
57 lines
2.3 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_ATSC_A53_H
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#define AVCODEC_ATSC_A53_H
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#include <stddef.h>
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#include <stdint.h>
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#include "libavutil/buffer.h"
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#include "libavutil/frame.h"
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/**
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* Check AVFrame for A53 side data and allocate and fill SEI message with A53 info
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*
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* @param frame Raw frame to get A53 side data from
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* @param prefix_len Number of bytes to allocate before SEI message
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* @param data Pointer to a variable to store allocated memory
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* Upon return the variable will hold NULL on error or if frame has no A53 info.
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* Otherwise it will point to prefix_len uninitialized bytes followed by
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* *sei_size SEI message
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* @param sei_size Pointer to a variable to store generated SEI message length
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* @return Zero on success, negative error code on failure
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*/
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int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len,
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void **data, size_t *sei_size);
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/**
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* Parse a data array for ATSC A53 Part 4 Closed Captions and store them in an AVBufferRef.
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*
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* @param pbuf Pointer to an AVBufferRef to append the closed captions. *pbuf may be NULL, in
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* which case a new buffer will be allocated and put in it.
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* @param data The data array containing the raw A53 data.
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* @param size Size of the data array in bytes.
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*
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* @return Number of closed captions parsed on success, negative error code on failure.
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* If no Closed Captions are parsed, *pbuf is untouched.
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*/
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int ff_parse_a53_cc(AVBufferRef **pbuf, const uint8_t *data, int size);
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#endif /* AVCODEC_ATSC_A53_H */
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