ARM: change MUL16() macro to inline function
[libav.git] / libavformat / oggparseflac.c
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1/*
2 * Copyright (C) 2005 Matthieu CASTET
115329f1 3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
bcfc40ae 10 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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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.
15 *
16 * You should have received a copy of the GNU Lesser General Public
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
5509bffa 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
20
21#include <stdlib.h>
245976da 22#include "libavcodec/bitstream.h"
bcfc40ae 23#include "avformat.h"
a0ddef24 24#include "oggdec.h"
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25
26#define FLAC_STREAMINFO_SIZE 0x22
27
28static int
29flac_header (AVFormatContext * s, int idx)
30{
31 ogg_t *ogg = s->priv_data;
32 ogg_stream_t *os = ogg->streams + idx;
33 AVStream *st = s->streams[idx];
34 GetBitContext gb;
35 int mdt;
36
37 if (os->buf[os->pstart] == 0xff)
38 return 0;
39
40 init_get_bits(&gb, os->buf + os->pstart, os->psize*8);
41 get_bits(&gb, 1); /* metadata_last */
42 mdt = get_bits(&gb, 7);
43
44 if (mdt == 0x7f) {
45 skip_bits(&gb, 4*8); /* "FLAC" */
46 if(get_bits(&gb, 8) != 1) /* unsupported major version */
47 return -1;
48 skip_bits(&gb, 8 + 16); /* minor version + header count */
49 skip_bits(&gb, 4*8); /* "fLaC" */
115329f1 50
bcfc40ae 51 /* METADATA_BLOCK_HEADER */
b997b67c 52 if (get_bits_long(&gb, 32) != FLAC_STREAMINFO_SIZE)
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53 return -1;
54
55 skip_bits(&gb, 16*2+24*2);
56
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57 st->codec->sample_rate = get_bits_long(&gb, 20);
58 st->codec->channels = get_bits(&gb, 3) + 1;
115329f1 59
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60 st->codec->codec_type = CODEC_TYPE_AUDIO;
61 st->codec->codec_id = CODEC_ID_FLAC;
bcfc40ae 62
01f4895c 63 st->codec->extradata =
bcfc40ae 64 av_malloc(FLAC_STREAMINFO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
01f4895c 65 memcpy (st->codec->extradata, os->buf + os->pstart + 5 + 4 + 4 + 4,
bcfc40ae 66 FLAC_STREAMINFO_SIZE);
01f4895c 67 st->codec->extradata_size = FLAC_STREAMINFO_SIZE;
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68
69 st->time_base.num = 1;
70 st->time_base.den = st->codec->sample_rate;
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71 } else if (mdt == 4) {
72 vorbis_comment (s, os->buf + os->pstart + 4, os->psize - 4);
73 }
74
75 return 1;
76}
77
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78static int
79old_flac_header (AVFormatContext * s, int idx)
80{
81 AVStream *st = s->streams[idx];
82 st->codec->codec_type = CODEC_TYPE_AUDIO;
83 st->codec->codec_id = CODEC_ID_FLAC;
84
85 return 0;
86}
87
547ea47d 88const ogg_codec_t ff_flac_codec = {
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89 .magic = "\177FLAC",
90 .magicsize = 5,
91 .header = flac_header
92};
880e3ef4 93
547ea47d 94const ogg_codec_t ff_old_flac_codec = {
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95 .magic = "fLaC",
96 .magicsize = 4,
97 .header = old_flac_header
98};