09c2d08c
 Hu Chunming
arm交付版
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/*
* IPU video demuxer
* Copyright (c) 2020 Paul B Mahol
*
* 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 "avformat.h"
#include "internal.h"
#include "avio_internal.h"
#include "rawdec.h"
#include "libavutil/intreadwrite.h"
#include "libavcodec/internal.h"
static int ipu_read_probe(const AVProbeData *p)
{
if (AV_RB32(p->buf) != MKBETAG('i', 'p', 'u', 'm'))
return 0;
if (AV_RL32(p->buf + 4) == 0)
return 0;
if (AV_RL16(p->buf + 8) == 0)
return 0;
if (AV_RL16(p->buf + 10) == 0)
return 0;
if (AV_RL32(p->buf + 12) == 0)
return 0;
return AVPROBE_SCORE_MAX;
}
static int ipu_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avio_skip(pb, 8);
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = AV_CODEC_ID_IPU;
st->codecpar->width = avio_rl16(pb);
st->codecpar->height = avio_rl16(pb);
st->start_time = 0;
st->duration =
st->nb_frames = avio_rl32(pb);
st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
avpriv_set_pts_info(st, 64, 1, 25);
return 0;
}
static const AVClass ipu_demuxer_class = {
.class_name = "ipu demuxer",
.item_name = av_default_item_name,
.option = ff_raw_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_ipu_demuxer = {
.name = "ipu",
.long_name = NULL_IF_CONFIG_SMALL("raw IPU Video"),
.read_probe = ipu_read_probe,
.read_header = ipu_read_header,
.read_packet = ff_raw_read_partial_packet,
.extensions = "ipu",
.flags = AVFMT_GENERIC_INDEX,
.raw_codec_id = AV_CODEC_ID_IPU,
.priv_data_size = sizeof(FFRawDemuxerContext),
.priv_class = &ipu_demuxer_class,
};
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