2 * Copyright (C) 2005 Matthieu CASTET
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavcodec/get_bits.h"
23 #include "libavcodec/flac.h"
27 #define OGG_FLAC_METADATA_TYPE_STREAMINFO 0x7F
30 flac_header (AVFormatContext * s, int idx)
32 struct ogg *ogg = s->priv_data;
33 struct ogg_stream *os = ogg->streams + idx;
34 AVStream *st = s->streams[idx];
39 if (os->buf[os->pstart] == 0xff)
42 init_get_bits(&gb, os->buf + os->pstart, os->psize*8);
43 skip_bits1(&gb); /* metadata_last */
44 mdt = get_bits(&gb, 7);
46 if (mdt == OGG_FLAC_METADATA_TYPE_STREAMINFO) {
47 uint8_t *streaminfo_start = os->buf + os->pstart + 5 + 4 + 4 + 4;
48 skip_bits_long(&gb, 4*8); /* "FLAC" */
49 if(get_bits(&gb, 8) != 1) /* unsupported major version */
51 skip_bits_long(&gb, 8 + 16); /* minor version + header count */
52 skip_bits_long(&gb, 4*8); /* "fLaC" */
54 /* METADATA_BLOCK_HEADER */
55 if (get_bits_long(&gb, 32) != FLAC_STREAMINFO_SIZE)
58 ff_flac_parse_streaminfo(st->codec, &si, streaminfo_start);
60 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
61 st->codec->codec_id = CODEC_ID_FLAC;
63 st->codec->extradata =
64 av_malloc(FLAC_STREAMINFO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
65 memcpy(st->codec->extradata, streaminfo_start, FLAC_STREAMINFO_SIZE);
66 st->codec->extradata_size = FLAC_STREAMINFO_SIZE;
68 st->time_base.num = 1;
69 st->time_base.den = st->codec->sample_rate;
70 } else if (mdt == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
71 ff_vorbis_comment (s, &st->metadata, os->buf + os->pstart + 4, os->psize - 4);
78 old_flac_header (AVFormatContext * s, int idx)
80 AVStream *st = s->streams[idx];
81 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
82 st->codec->codec_id = CODEC_ID_FLAC;
87 const struct ogg_codec ff_flac_codec = {
93 const struct ogg_codec ff_old_flac_codec = {
96 .header = old_flac_header