[deb_ffmpeg.git] / ffmpeg / libavformat / ivfdec.c

/*
 * 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 "internal.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)
{
    AVStream *st;
    AVRational time_base;

    avio_rl32(s->pb); // DKIF
    avio_rl16(s->pb); // version
    avio_rl16(s->pb); // header size

    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);


    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_tag  = avio_rl32(s->pb);
    st->codec->codec_id   = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag);
    st->codec->width      = avio_rl16(s->pb);
    st->codec->height     = avio_rl16(s->pb);
    time_base.den         = avio_rl32(s->pb);
    time_base.num         = avio_rl32(s->pb);
    st->duration          = avio_rl64(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;
    }

    avpriv_set_pts_info(st, 64, time_base.num, time_base.den);

    return 0;
}

static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
    int ret, size = avio_rl32(s->pb);
    int64_t   pts = avio_rl64(s->pb);

    ret = av_get_packet(s->pb, pkt, size);
    pkt->stream_index = 0;
    pkt->pts          = pts;
    pkt->pos         -= 12;

    return ret;
}

AVInputFormat ff_ivf_demuxer = {
    .name           = "ivf",
    .long_name      = NULL_IF_CONFIG_SMALL("On2 IVF"),
    .read_probe     = probe,
    .read_header    = read_header,
    .read_packet    = read_packet,
    .flags          = AVFMT_GENERIC_INDEX,
    .codec_tag      = (const AVCodecTag* const []){ ff_codec_bmp_tags, 0 },
};
Commit	Line	Data
	1	/*
	2	* Copyright (c) 2010 David Conrad
	3	*
	4	* This file is part of FFmpeg.
	5	*
	6	* FFmpeg is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* FFmpeg is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with FFmpeg; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include "avformat.h"
	22	#include "internal.h"
	23	#include "riff.h"
	24	#include "libavutil/intreadwrite.h"
	25
	26	static int probe(AVProbeData *p)
	27	{
	28	if (AV_RL32(p->buf) == MKTAG('D','K','I','F')
	29	&& !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32)
	30	return AVPROBE_SCORE_MAX-2;
	31
	32	return 0;
	33	}
	34
	35	static int read_header(AVFormatContext *s)
	36	{
	37	AVStream *st;
	38	AVRational time_base;
	39
	40	avio_rl32(s->pb); // DKIF
	41	avio_rl16(s->pb); // version
	42	avio_rl16(s->pb); // header size
	43
	44	st = avformat_new_stream(s, NULL);
	45	if (!st)
	46	return AVERROR(ENOMEM);
	47
	48
	49	st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
	50	st->codec->codec_tag = avio_rl32(s->pb);
	51	st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag);
	52	st->codec->width = avio_rl16(s->pb);
	53	st->codec->height = avio_rl16(s->pb);
	54	time_base.den = avio_rl32(s->pb);
	55	time_base.num = avio_rl32(s->pb);
	56	st->duration = avio_rl64(s->pb);
	57
	58	st->need_parsing = AVSTREAM_PARSE_HEADERS;
	59
	60	if (!time_base.den \|\| !time_base.num) {
	61	av_log(s, AV_LOG_ERROR, "Invalid frame rate\n");
	62	return AVERROR_INVALIDDATA;
	63	}
	64
	65	avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
	66
	67	return 0;
	68	}
	69
	70	static int read_packet(AVFormatContext s, AVPacket pkt)
	71	{
	72	int ret, size = avio_rl32(s->pb);
	73	int64_t pts = avio_rl64(s->pb);
	74
	75	ret = av_get_packet(s->pb, pkt, size);
	76	pkt->stream_index = 0;
	77	pkt->pts = pts;
	78	pkt->pos -= 12;
	79
	80	return ret;
	81	}
	82
	83	AVInputFormat ff_ivf_demuxer = {
	84	.name = "ivf",
	85	.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
	86	.read_probe = probe,
	87	.read_header = read_header,
	88	.read_packet = read_packet,
	89	.flags = AVFMT_GENERIC_INDEX,
	90	.codec_tag = (const AVCodecTag* const []){ ff_codec_bmp_tags, 0 },
	91	};