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73 lines
2.3 KiB
73 lines
2.3 KiB
/* |
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* RAW Ingenient MJPEG demuxer |
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* Copyright (c) 2005 Alex Beregszaszi |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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 "rawdec.h" |
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// http://www.artificis.hu/files/texts/ingenient.txt |
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static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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int ret, size, w, h, unk1, unk2; |
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if (avio_rl32(s->pb) != MKTAG('M', 'J', 'P', 'G')) |
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return AVERROR(EIO); // FIXME |
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size = avio_rl32(s->pb); |
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w = avio_rl16(s->pb); |
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h = avio_rl16(s->pb); |
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avio_skip(s->pb, 8); // zero + size (padded?) |
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avio_skip(s->pb, 2); |
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unk1 = avio_rl16(s->pb); |
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unk2 = avio_rl16(s->pb); |
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avio_skip(s->pb, 22); // ASCII timestamp |
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av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n", |
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size, w, h, unk1, unk2); |
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if (av_new_packet(pkt, size) < 0) |
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return AVERROR(ENOMEM); |
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pkt->pos = avio_tell(s->pb); |
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pkt->stream_index = 0; |
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ret = avio_read(s->pb, pkt->data, size); |
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if (ret < 0) { |
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av_packet_unref(pkt); |
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return ret; |
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} |
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pkt->size = ret; |
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return ret; |
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} |
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FF_RAWVIDEO_DEMUXER_CLASS(ingenient) |
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AVInputFormat ff_ingenient_demuxer = { |
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.name = "ingenient", |
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.long_name = NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"), |
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.priv_data_size = sizeof(FFRawVideoDemuxerContext), |
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.read_header = ff_raw_video_read_header, |
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.read_packet = ingenient_read_packet, |
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.flags = AVFMT_GENERIC_INDEX, |
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.extensions = "cgi", // FIXME |
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.raw_codec_id = AV_CODEC_ID_MJPEG, |
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.priv_class = &ingenient_demuxer_class, |
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};
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