mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 03:12:08 +00:00
b800327f4c
This commit does for AVInputFormat what commit59c9dc82f4did for AVOutputFormat: It adds a new type FFInputFormat, moves all the internals of AVInputFormat to it and adds a now reduced AVInputFormat as first member. This does not affect/improve extensibility of both public or private fields for demuxers (it is still a mess due to lavd). This is possible since50f34172e0(which removed the last usage of an internal field of AVInputFormat in fftools). (Hint: tools/probetest.c accesses the internals of FFInputFormat as well, but given that it is a testing tool this is not considered a problem.) Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/*
|
|
* Alias PIX image demuxer
|
|
* Copyright (c) 2014 Michael Niedermayer
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "demux.h"
|
|
#include "img2.h"
|
|
#include "libavcodec/bytestream.h"
|
|
|
|
static int alias_pix_read_probe(const AVProbeData *p)
|
|
{
|
|
const uint8_t *b = p->buf;
|
|
const uint8_t *end = b + p->buf_size;
|
|
int width = bytestream_get_be16(&b);
|
|
int height = bytestream_get_be16(&b);
|
|
av_unused int ox = bytestream_get_be16(&b);
|
|
av_unused int oy = bytestream_get_be16(&b);
|
|
int bpp = bytestream_get_be16(&b);
|
|
int x, y;
|
|
|
|
if (!width || !height)
|
|
return 0;
|
|
|
|
if (bpp != 24 && bpp != 8)
|
|
return 0;
|
|
|
|
for (y=0; y<2 && y<height; y++) {
|
|
for (x=0; x<width; ) {
|
|
int count = *b++;
|
|
if (count == 0 || x + count > width)
|
|
return 0;
|
|
if (b > end)
|
|
return AVPROBE_SCORE_MAX / 8;
|
|
b += bpp / 8;
|
|
x += count;
|
|
}
|
|
}
|
|
|
|
return AVPROBE_SCORE_EXTENSION + 1;
|
|
}
|
|
|
|
static const AVClass image2_alias_pix_class = {
|
|
.class_name = "alias_pix demuxer",
|
|
.item_name = av_default_item_name,
|
|
.option = ff_img_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
const FFInputFormat ff_image2_alias_pix_demuxer = {
|
|
.p.name = "alias_pix",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("Alias/Wavefront PIX image"),
|
|
.p.priv_class = &image2_alias_pix_class,
|
|
.priv_data_size = sizeof(VideoDemuxData),
|
|
.read_probe = alias_pix_read_probe,
|
|
.read_header = ff_img_read_header,
|
|
.read_packet = ff_img_read_packet,
|
|
.raw_codec_id = AV_CODEC_ID_ALIAS_PIX,
|
|
};
|