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7a72695c05
* commit '36ef5369ee9b336febc2c270f8718cec4476cb85': Replace all CODEC_ID_* with AV_CODEC_ID_* lavc: add AV prefix to codec ids. Conflicts: doc/APIchanges doc/examples/decoding_encoding.c doc/examples/muxing.c ffmpeg.c ffprobe.c ffserver.c libavcodec/8svx.c libavcodec/avcodec.h libavcodec/dnxhd_parser.c libavcodec/dvdsubdec.c libavcodec/error_resilience.c libavcodec/h263dec.c libavcodec/libvorbisenc.c libavcodec/mjpeg_parser.c libavcodec/mjpegenc.c libavcodec/mpeg12.c libavcodec/mpeg4videodec.c libavcodec/mpegvideo.c libavcodec/mpegvideo_enc.c libavcodec/pcm.c libavcodec/r210dec.c libavcodec/utils.c libavcodec/v210dec.c libavcodec/version.h libavdevice/alsa-audio-dec.c libavdevice/bktr.c libavdevice/v4l2.c libavformat/asfdec.c libavformat/asfenc.c libavformat/avformat.h libavformat/avidec.c libavformat/caf.c libavformat/electronicarts.c libavformat/flacdec.c libavformat/flvdec.c libavformat/flvenc.c libavformat/framecrcenc.c libavformat/img2.c libavformat/img2dec.c libavformat/img2enc.c libavformat/ipmovie.c libavformat/isom.c libavformat/matroska.c libavformat/matroskadec.c libavformat/matroskaenc.c libavformat/mov.c libavformat/movenc.c libavformat/mp3dec.c libavformat/mpeg.c libavformat/mpegts.c libavformat/mxf.c libavformat/mxfdec.c libavformat/mxfenc.c libavformat/nsvdec.c libavformat/nut.c libavformat/oggenc.c libavformat/pmpdec.c libavformat/rawdec.c libavformat/rawenc.c libavformat/riff.c libavformat/sdp.c libavformat/utils.c libavformat/vocenc.c libavformat/wtv.c libavformat/xmv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
97 lines
3.2 KiB
C
97 lines
3.2 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 "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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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, frame_size;
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uint32_t overlap, extra_headers;
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uint8_t *extradata;
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extradata = av_malloc(2 * sizeof(uint32_t) +
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FF_INPUT_BUFFER_PADDING_SIZE);
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priv = av_malloc(sizeof(struct oggcelt_private));
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if (!extradata || !priv) {
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av_free(extradata);
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av_free(priv);
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return AVERROR(ENOMEM);
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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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frame_size = AV_RL32(p + 44);
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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->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_id = AV_CODEC_ID_CELT;
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st->codec->sample_rate = sample_rate;
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st->codec->channels = nb_channels;
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st->codec->frame_size = frame_size;
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av_free(st->codec->extradata);
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st->codec->extradata = extradata;
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st->codec->extradata_size = 2 * sizeof(uint32_t);
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if (sample_rate)
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avpriv_set_pts_info(st, 64, 1, sample_rate);
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priv->extra_headers_left = 1 + extra_headers;
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av_free(os->private);
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os->private = priv;
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AV_WL32(extradata + 0, overlap);
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AV_WL32(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_comment(s, &st->metadata, 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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};
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