FFmpeg/libavformat/oggparsecelt.c
Michael Niedermayer 46a35959d8 Merge commit '7751e4693dd10ec98c20fbd9887233b575034272'
* commit '7751e4693dd10ec98c20fbd9887233b575034272':
  ogg: check that the expected number of headers had been parsed
  libx264: change default to closed gop to match x264cli
  Use avcodec_free_frame() to free AVFrames.
  lavf: use a malloced AVFrame in try_decode_frame().
  lavc: add avcodec_free_frame().
  lavc: ensure extended_data is set properly on decoding
  lavc: initialize AVFrame.extended_data in avcodec_get_frame_defaults()
  lavc: use av_mallocz to allocate AVFrames.
  lavc: rename the argument of avcodec_alloc_frame/get_frame_defaults

Conflicts:
	doc/APIchanges
	doc/examples/decoding_encoding.c
	libavcodec/utils.c
	libavcodec/version.h
	libavfilter/src_movie.c
	libavformat/oggdec.c
	libavformat/oggdec.h
	libavformat/oggparsetheora.c
	libavformat/utils.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-09-25 15:15:16 +02:00

98 lines
3.2 KiB
C

/*
* Xiph CELT parser for Ogg
* Copyright (c) 2011 Nicolas George
*
* 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 <string.h>
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "internal.h"
#include "oggdec.h"
struct oggcelt_private {
int extra_headers_left;
};
static int celt_header(AVFormatContext *s, int idx)
{
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
struct oggcelt_private *priv = os->private;
uint8_t *p = os->buf + os->pstart;
if (os->psize == 60 &&
!memcmp(p, ff_celt_codec.magic, ff_celt_codec.magicsize)) {
/* Main header */
uint32_t version, sample_rate, nb_channels, frame_size;
uint32_t overlap, extra_headers;
uint8_t *extradata;
extradata = av_malloc(2 * sizeof(uint32_t) +
FF_INPUT_BUFFER_PADDING_SIZE);
priv = av_malloc(sizeof(struct oggcelt_private));
if (!extradata || !priv) {
av_free(extradata);
av_free(priv);
return AVERROR(ENOMEM);
}
version = AV_RL32(p + 28);
/* unused header size field skipped */
sample_rate = AV_RL32(p + 36);
nb_channels = AV_RL32(p + 40);
frame_size = AV_RL32(p + 44);
overlap = AV_RL32(p + 48);
/* unused bytes per packet field skipped */
extra_headers = AV_RL32(p + 56);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = AV_CODEC_ID_CELT;
st->codec->sample_rate = sample_rate;
st->codec->channels = nb_channels;
st->codec->frame_size = frame_size;
av_free(st->codec->extradata);
st->codec->extradata = extradata;
st->codec->extradata_size = 2 * sizeof(uint32_t);
if (sample_rate)
avpriv_set_pts_info(st, 64, 1, sample_rate);
priv->extra_headers_left = 1 + extra_headers;
av_free(os->private);
os->private = priv;
AV_WL32(extradata + 0, overlap);
AV_WL32(extradata + 4, version);
return 1;
} else if (priv && priv->extra_headers_left) {
/* Extra headers (vorbiscomment) */
ff_vorbis_comment(s, &st->metadata, p, os->psize);
priv->extra_headers_left--;
return 1;
} else {
return 0;
}
}
const struct ogg_codec ff_celt_codec = {
.magic = "CELT ",
.magicsize = 8,
.header = celt_header,
.nb_header = 2,
};