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7c1aba4f01
* qatar/master: (21 commits) fate: allow testing with libavfilter disabled x86: XOP/FMA4 CPU detection support ws_snd: misc cosmetic clean-ups ws_snd: remove the 2-bit ADPCM table and just subtract 2 instead. ws_snd: use memcpy() and memset() instead of loops ws_snd: use samples pointer for loop termination instead of a separate iterator variable. ws_snd: make sure number of channels is 1 ws_snd: add some checks to prevent buffer overread or overwrite. ws_snd: decode to AV_SAMPLE_FMT_U8 instead of S16. flacdec: fix buffer size checking in get_metadata_size() rtp: Simplify ff_rtp_get_payload_type rtpenc: Add a payload type private option rtp: Correct ff_rtp_get_payload_type documentation avconv: replace all fprintf() by av_log(). avconv: change av_log verbosity from ERROR to FATAL for fatal errors. cmdutils: replace fprintf() by av_log() avtools: parse loglevel before all the other options. oggdec: add support for Xiph's CELT codec sol: return error if av_get_packet() fails. cosmetics: reindent and pretty-print ... Conflicts: avconv.c cmdutils.c libavcodec/avcodec.h libavcodec/version.h libavformat/oggparsecelt.c libavformat/utils.c libavutil/avutil.h 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 / Opus 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 "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 = 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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st->codec->sample_fmt = AV_SAMPLE_FMT_S16;
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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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av_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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