From 14d6838638f8c0dafadebe9d7cbd29a62239620c Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Mon, 14 Sep 2020 12:02:50 +0200 Subject: avformat: add IPU demuxer --- libavformat/ipudec.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 libavformat/ipudec.c (limited to 'libavformat/ipudec.c') diff --git a/libavformat/ipudec.c b/libavformat/ipudec.c new file mode 100644 index 0000000000..df53df00d9 --- /dev/null +++ b/libavformat/ipudec.c @@ -0,0 +1,89 @@ +/* + * 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, +}; -- cgit v1.2.3