mirror of
https://github.com/FFmpeg/FFmpeg.git
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90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
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* IPU video demuxer
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* Copyright (c) 2020 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "internal.h"
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#include "avio_internal.h"
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#include "rawdec.h"
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#include "libavutil/intreadwrite.h"
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#include "libavcodec/internal.h"
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static int ipu_read_probe(const AVProbeData *p)
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{
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if (AV_RB32(p->buf) != MKBETAG('i', 'p', 'u', 'm'))
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return 0;
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if (AV_RL32(p->buf + 4) == 0)
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return 0;
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if (AV_RL16(p->buf + 8) == 0)
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return 0;
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if (AV_RL16(p->buf + 10) == 0)
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return 0;
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if (AV_RL32(p->buf + 12) == 0)
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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static int ipu_read_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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avio_skip(pb, 8);
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_IPU;
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st->codecpar->width = avio_rl16(pb);
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st->codecpar->height = avio_rl16(pb);
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st->start_time = 0;
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st->duration =
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st->nb_frames = avio_rl32(pb);
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st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
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avpriv_set_pts_info(st, 64, 1, 25);
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return 0;
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}
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static const AVClass ipu_demuxer_class = {
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.class_name = "ipu demuxer",
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.item_name = av_default_item_name,
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.option = ff_raw_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVInputFormat ff_ipu_demuxer = {
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.name = "ipu",
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.long_name = NULL_IF_CONFIG_SMALL("raw IPU Video"),
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.read_probe = ipu_read_probe,
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.read_header = ipu_read_header,
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.read_packet = ff_raw_read_partial_packet,
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.extensions = "ipu",
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.flags = AVFMT_GENERIC_INDEX,
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.raw_codec_id = AV_CODEC_ID_IPU,
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.priv_data_size = sizeof(FFRawDemuxerContext),
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.priv_class = &ipu_demuxer_class,
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};
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