| /* |
| * 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, |
| }; |