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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
/*
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* Xiph CELT parser for Ogg
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* Copyright (c) 2011 Nicolas George
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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 <string.h>
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mem.h"
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#include "avformat.h"
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#include "internal.h"
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#include "oggdec.h"
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struct oggcelt_private {
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int extra_headers_left;
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};
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static int celt_header(AVFormatContext *s, int idx)
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{
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struct ogg *ogg = s->priv_data;
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struct ogg_stream *os = ogg->streams + idx;
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AVStream *st = s->streams[idx];
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struct oggcelt_private *priv = os->private;
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uint8_t *p = os->buf + os->pstart;
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int ret;
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if (os->psize == 60 &&
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!memcmp(p, ff_celt_codec.magic, ff_celt_codec.magicsize)) {
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/* Main header */
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uint32_t version, sample_rate, nb_channels;
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uint32_t overlap, extra_headers;
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priv = av_malloc(sizeof(struct oggcelt_private));
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if (!priv)
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return AVERROR(ENOMEM);
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ret = ff_alloc_extradata(st->codecpar, 2 * sizeof(uint32_t));
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if (ret < 0) {
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av_free(priv);
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return ret;
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}
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version = AV_RL32(p + 28);
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/* unused header size field skipped */
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sample_rate = AV_RL32(p + 36);
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nb_channels = AV_RL32(p + 40);
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overlap = AV_RL32(p + 48);
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/* unused bytes per packet field skipped */
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extra_headers = AV_RL32(p + 56);
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_CELT;
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st->codecpar->sample_rate = sample_rate;
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st->codecpar->ch_layout.nb_channels = nb_channels;
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if (sample_rate)
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avpriv_set_pts_info(st, 64, 1, sample_rate);
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if (os->private) {
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av_free(priv);
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priv = os->private;
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}
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os->private = priv;
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priv->extra_headers_left = 1 + extra_headers;
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AV_WL32(st->codecpar->extradata + 0, overlap);
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AV_WL32(st->codecpar->extradata + 4, version);
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return 1;
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} else if (priv && priv->extra_headers_left) {
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/* Extra headers (vorbiscomment) */
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ff_vorbis_stream_comment(s, st, p, os->psize);
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priv->extra_headers_left--;
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return 1;
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} else {
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return 0;
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}
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}
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const struct ogg_codec ff_celt_codec = {
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.magic = "CELT ",
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.magicsize = 8,
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.header = celt_header,
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.nb_header = 2,
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};
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