From 173bb37f8239cd2ea27d7e2bf1bcfc21485df598 Mon Sep 17 00:00:00 2001 From: David Conrad Date: Thu, 27 May 2010 21:23:04 +0000 Subject: On2 IVF demuxer Originally committed as revision 23357 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/ivfdec.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 libavformat/ivfdec.c (limited to 'libavformat/ivfdec.c') diff --git a/libavformat/ivfdec.c b/libavformat/ivfdec.c new file mode 100644 index 0000000000..9baa3ec20e --- /dev/null +++ b/libavformat/ivfdec.c @@ -0,0 +1,91 @@ +/* + * Copyright (c) 2010 David Conrad + * + * 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 "riff.h" +#include "libavutil/intreadwrite.h" + +static int probe(AVProbeData *p) +{ + if (AV_RL32(p->buf) == MKTAG('D','K','I','F') + && !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32) + return AVPROBE_SCORE_MAX-2; + + return 0; +} + +static int read_header(AVFormatContext *s, AVFormatParameters *ap) +{ + AVStream *st; + AVRational time_base; + + get_le32(s->pb); // DKIF + get_le16(s->pb); // version + get_le16(s->pb); // header size + + st = av_new_stream(s, 0); + if (!st) + return AVERROR(ENOMEM); + + + st->codec->codec_type = AVMEDIA_TYPE_VIDEO; + st->codec->codec_tag = get_le32(s->pb); + st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag); + st->codec->width = get_le16(s->pb); + st->codec->height = get_le16(s->pb); + time_base.den = get_le32(s->pb); + time_base.num = get_le32(s->pb); + st->duration = get_le64(s->pb); + + st->need_parsing = AVSTREAM_PARSE_HEADERS; + + if (!time_base.den || !time_base.num) { + av_log(s, AV_LOG_ERROR, "Invalid frame rate\n"); + return AVERROR_INVALIDDATA; + } + + av_set_pts_info(st, 64, time_base.num, time_base.den); + + return 0; +} + +static int read_packet(AVFormatContext *s, AVPacket *pkt) +{ + int ret, size = get_le32(s->pb); + int64_t pts = get_le64(s->pb); + + ret = av_get_packet(s->pb, pkt, size); + pkt->stream_index = 0; + pkt->pts = pts; + pkt->pos -= 12; + + return ret; +} + +AVInputFormat ivf_demuxer = { + "ivf", + NULL_IF_CONFIG_SMALL("On2 IVF"), + 0, + probe, + read_header, + read_packet, + .flags= AVFMT_GENERIC_INDEX, + .codec_tag = (const AVCodecTag*[]){ff_codec_bmp_tags, 0}, +}; -- cgit v1.2.3