2 * Alias PIX image demuxer
3 * Copyright (c) 2014 Michael Niedermayer
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavcodec/bytestream.h"
25 static int alias_pix_read_probe(AVProbeData
*p
)
27 const uint8_t *b
= p
->buf
;
28 const uint8_t *end
= b
+ p
->buf_size
;
29 int width
= bytestream_get_be16(&b
);
30 int height
= bytestream_get_be16(&b
);
31 av_unused
int ox
= bytestream_get_be16(&b
);
32 av_unused
int oy
= bytestream_get_be16(&b
);
33 int bpp
= bytestream_get_be16(&b
);
36 if (!width
|| !height
)
39 if (bpp
!= 24 && bpp
!= 8)
42 for (y
=0; y
<2 && y
<height
; y
++) {
43 for (x
=0; x
<width
; ) {
45 if (count
== 0 || x
+ count
> width
)
48 return AVPROBE_SCORE_MAX
/ 8;
54 return AVPROBE_SCORE_EXTENSION
+ 1;
57 static const AVClass image2_alias_pix_class
= {
58 .class_name
= "alias_pix demuxer",
59 .item_name
= av_default_item_name
,
60 .option
= ff_img_options
,
61 .version
= LIBAVUTIL_VERSION_INT
,
64 AVInputFormat ff_image2_alias_pix_demuxer
= {
66 .long_name
= NULL_IF_CONFIG_SMALL("Alias/Wavefront PIX image"),
67 .priv_data_size
= sizeof(VideoDemuxData
),
68 .read_probe
= alias_pix_read_probe
,
69 .read_header
= ff_img_read_header
,
70 .read_packet
= ff_img_read_packet
,
71 .raw_codec_id
= AV_CODEC_ID_ALIAS_PIX
,
72 .priv_class
= &image2_alias_pix_class
,