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91 lines
2.6 KiB
91 lines
2.6 KiB
/* |
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* Copyright (c) 2010 David Conrad |
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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 "riff.h" |
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#include "libavutil/intreadwrite.h" |
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static int probe(AVProbeData *p) |
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{ |
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if (AV_RL32(p->buf) == MKTAG('D','K','I','F') |
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&& !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32) |
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return AVPROBE_SCORE_MAX-2; |
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return 0; |
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} |
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static int read_header(AVFormatContext *s) |
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{ |
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AVStream *st; |
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AVRational time_base; |
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avio_rl32(s->pb); // DKIF |
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avio_rl16(s->pb); // version |
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avio_rl16(s->pb); // header size |
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st = avformat_new_stream(s, NULL); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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st->codec->codec_tag = avio_rl32(s->pb); |
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st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag); |
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st->codec->width = avio_rl16(s->pb); |
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st->codec->height = avio_rl16(s->pb); |
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time_base.den = avio_rl32(s->pb); |
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time_base.num = avio_rl32(s->pb); |
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st->duration = avio_rl64(s->pb); |
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st->need_parsing = AVSTREAM_PARSE_HEADERS; |
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if (!time_base.den || !time_base.num) { |
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av_log(s, AV_LOG_ERROR, "Invalid frame rate\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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avpriv_set_pts_info(st, 64, time_base.num, time_base.den); |
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return 0; |
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} |
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static int read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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int ret, size = avio_rl32(s->pb); |
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int64_t pts = avio_rl64(s->pb); |
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ret = av_get_packet(s->pb, pkt, size); |
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pkt->stream_index = 0; |
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pkt->pts = pts; |
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pkt->pos -= 12; |
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return ret; |
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} |
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AVInputFormat ff_ivf_demuxer = { |
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.name = "ivf", |
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.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"), |
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.read_probe = probe, |
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.read_header = read_header, |
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.read_packet = read_packet, |
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.flags= AVFMT_GENERIC_INDEX, |
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.codec_tag = (const AVCodecTag*[]){ff_codec_bmp_tags, 0}, |
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};
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