On 12/12/14 5:57 PM, Vittorio Giovara wrote:
> From: James Almer <[email protected]>
>
> Signed-off-by: James Almer <[email protected]>
> Signed-off-by: Michael Niedermayer <[email protected]>
> Signed-off-by: Vittorio Giovara <[email protected]>
> ---
> Changelog | 1 +
> libavformat/Makefile | 1 +
> libavformat/oggdec.c | 1 +
> libavformat/oggdec.h | 1 +
> libavformat/oggparsevp8.c | 142
> ++++++++++++++++++++++++++++++++++++++++++++++
> libavformat/version.h | 4 +-
> 6 files changed, 148 insertions(+), 2 deletions(-)
> create mode 100644 libavformat/oggparsevp8.c
>
[...]
> diff --git a/libavformat/oggparsevp8.c b/libavformat/oggparsevp8.c
> new file mode 100644
> index 0000000..1256bfe
> --- /dev/null
> +++ b/libavformat/oggparsevp8.c
> @@ -0,0 +1,142 @@
> +/*
> + * On2 VP8 parser for Ogg
> + * Copyright (C) 2013 James Almer
> + *
> + * This file is part of Libav.
> + *
> + * Libav 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.
> + *
> + * Libav 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 Libav; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
> USA
> + */
> +
> +#include "libavutil/intreadwrite.h"
> +
> +#include "avformat.h"
> +#include "internal.h"
> +#include "oggdec.h"
> +
> +#define VP8_HEADER_SIZE 26
> +
> +static int vp8_header(AVFormatContext *s, int idx)
> +{
> + struct ogg *ogg = s->priv_data;
> + struct ogg_stream *os = ogg->streams + idx;
> + uint8_t *p = os->buf + os->pstart;
> + AVStream *st = s->streams[idx];
> + AVRational framerate;
> +
> + if (os->psize < 7 || p[0] != 0x4f)
> + return 0;
> +
> + switch (p[5]){
> + case 0x01:
> + if (os->psize < VP8_HEADER_SIZE) {
> + av_log(s, AV_LOG_ERROR, "Invalid OggVP8 header packet");
> + return AVERROR_INVALIDDATA;
> + }
> +
> + if (p[6] != 1) {
> + av_log(s, AV_LOG_WARNING,
> + "Unknown OggVP8 version %d.%d\n", p[6], p[7]);
> + return AVERROR_INVALIDDATA;
> + }
> +
> + st->codec->width = AV_RB16(p + 8);
> + st->codec->height = AV_RB16(p + 10);
> + st->sample_aspect_ratio.num = AV_RB24(p + 12);
> + st->sample_aspect_ratio.den = AV_RB24(p + 15);
> + framerate.den = AV_RB32(p + 18);
> + framerate.num = AV_RB32(p + 22);
> +
> + avpriv_set_pts_info(st, 64, framerate.num, framerate.den);
> + st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
> + st->codec->codec_id = AV_CODEC_ID_VP8;
> + st->need_parsing = AVSTREAM_PARSE_HEADERS;
> + break;
> + case 0x02:
> + if (p[6] != 0x20)
> + return AVERROR_INVALIDDATA;
> + ff_vorbis_comment(s, &st->metadata, p + 7, os->psize - 7, 1);
ff_vorbis_stream_comment() for consistency with the other parsers.
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