FFmpeg
atsc_a53.h
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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  */
40 int 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  */
54 int ff_parse_a53_cc(AVBufferRef **pbuf, const uint8_t *data, int size);
55 
56 #endif /* AVCODEC_ATSC_A53_H */
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
data
const char data[16]
Definition: mxf.c:148
ff_alloc_a53_sei
int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len, void **data, size_t *sei_size)
Check AVFrame for A53 side data and allocate and fill SEI message with A53 info.
Definition: atsc_a53.c:25
frame
static AVFrame * frame
Definition: demux_decode.c:54
size
int size
Definition: twinvq_data.h:10344
frame.h
buffer.h
ff_parse_a53_cc
int ff_parse_a53_cc(AVBufferRef **pbuf, const uint8_t *data, int size)
Parse a data array for ATSC A53 Part 4 Closed Captions and store them in an AVBufferRef.
Definition: atsc_a53.c:68
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82