FFmpeg
rawutils.h
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1 /*
2  * copyright (c) 2001 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVFORMAT_RAWUTILS_H
22 #define AVFORMAT_RAWUTILS_H
23 
24 #include <stdint.h>
25 #include "libavcodec/codec_par.h"
26 #include "libavcodec/packet.h"
27 #include "avformat.h"
28 
29 #define CONTAINS_PAL 2
30 /**
31  * Reshuffles the lines to use the user specified stride.
32  *
33  * @param ppkt input and output packet
34  * @return negative error code or
35  * 0 if no new packet was allocated
36  * non-zero if a new packet was allocated and ppkt has to be freed
37  * CONTAINS_PAL if in addition to a new packet the old contained a palette
38  */
39 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
40 
41 /**
42  * Retrieves the palette from a packet, either from side data, or
43  * appended to the video data in the packet itself (raw video only).
44  * It is commonly used after a call to ff_reshuffle_raw_rgb().
45  *
46  * Use 0 for the ret parameter to check for side data only.
47  *
48  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
49  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
50  * @param palette pointer to palette buffer
51  * @return negative error code or
52  * 1 if the packet has a palette, else 0
53  */
54 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
55 
56 #endif /* AVFORMAT_RAWUTILS_H */
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:53
pkt
AVPacket * pkt
Definition: movenc.c:59
s
#define s(width, name)
Definition: cbs_vp9.c:256
AVFormatContext
Format I/O context.
Definition: avformat.h:1216
ff_reshuffle_raw_rgb
int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride)
Reshuffles the lines to use the user specified stride.
Definition: rawutils.c:27
ff_get_packet_palette
int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette)
Retrieves the palette from a packet, either from side data, or appended to the video data in the pack...
Definition: rawutils.c:71
packet.h
ret
ret
Definition: filter_design.txt:187
avformat.h
codec_par.h
AVPacket
This structure stores compressed data.
Definition: packet.h:351