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81 lines
2.3 KiB
81 lines
2.3 KiB
/* |
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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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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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ffstream(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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const 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 = &ff_raw_demuxer_class, |
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};
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