FFmpeg
flac.h
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1 /*
2  * FLAC (Free Lossless Audio Codec) common stuff
3  * Copyright (c) 2008 Justin Ruggles
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * FLAC (Free Lossless Audio Codec) common stuff
25  */
26 
27 #ifndef AVCODEC_FLAC_H
28 #define AVCODEC_FLAC_H
29 
30 #include "libavutil/intreadwrite.h"
31 
32 #define FLAC_STREAMINFO_SIZE 34
33 #define FLAC_MAX_CHANNELS 8
34 #define FLAC_MIN_BLOCKSIZE 16
35 #define FLAC_MAX_BLOCKSIZE 65535
36 #define FLAC_MIN_FRAME_SIZE 10
37 
38 enum {
43 };
44 
45 enum {
54 };
55 
56 /**
57  * Parse the metadata block parameters from the header.
58  * @param[in] block_header header data, at least 4 bytes
59  * @param[out] last indicator for last metadata block
60  * @param[out] type metadata block type
61  * @param[out] size metadata block size
62  */
63 static av_always_inline void flac_parse_block_header(const uint8_t *block_header,
64  int *last, int *type, int *size)
65 {
66  int tmp = *block_header;
67  if (last)
68  *last = tmp & 0x80;
69  if (type)
70  *type = tmp & 0x7F;
71  if (size)
72  *size = AV_RB24(block_header + 1);
73 }
74 
75 #endif /* AVCODEC_FLAC_H */
FLAC_METADATA_TYPE_APPLICATION
@ FLAC_METADATA_TYPE_APPLICATION
Definition: flac.h:48
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
FLAC_METADATA_TYPE_INVALID
@ FLAC_METADATA_TYPE_INVALID
Definition: flac.h:53
FLAC_METADATA_TYPE_VORBIS_COMMENT
@ FLAC_METADATA_TYPE_VORBIS_COMMENT
Definition: flac.h:50
intreadwrite.h
flac_parse_block_header
static av_always_inline void flac_parse_block_header(const uint8_t *block_header, int *last, int *type, int *size)
Parse the metadata block parameters from the header.
Definition: flac.h:63
FLAC_METADATA_TYPE_PICTURE
@ FLAC_METADATA_TYPE_PICTURE
Definition: flac.h:52
FLAC_METADATA_TYPE_SEEKTABLE
@ FLAC_METADATA_TYPE_SEEKTABLE
Definition: flac.h:49
FLAC_CHMODE_LEFT_SIDE
@ FLAC_CHMODE_LEFT_SIDE
Definition: flac.h:40
FLAC_METADATA_TYPE_STREAMINFO
@ FLAC_METADATA_TYPE_STREAMINFO
Definition: flac.h:46
FLAC_METADATA_TYPE_PADDING
@ FLAC_METADATA_TYPE_PADDING
Definition: flac.h:47
FLAC_CHMODE_MID_SIDE
@ FLAC_CHMODE_MID_SIDE
Definition: flac.h:42
size
int size
Definition: twinvq_data.h:10344
FLAC_METADATA_TYPE_CUESHEET
@ FLAC_METADATA_TYPE_CUESHEET
Definition: flac.h:51
FLAC_CHMODE_INDEPENDENT
@ FLAC_CHMODE_INDEPENDENT
Definition: flac.h:39
av_always_inline
#define av_always_inline
Definition: attributes.h:49
AV_RB24
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:97
FLAC_CHMODE_RIGHT_SIDE
@ FLAC_CHMODE_RIGHT_SIDE
Definition: flac.h:41