1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2002 by Linus Nielsen Feltzing
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
25 #define MPEG_VERSION1 0
26 #define MPEG_VERSION2 1
27 #define MPEG_VERSION2_5 2
29 #include <string.h> /* size_t */
32 /* Standard MP3 frame header fields */
39 int frame_size
; /* Frame size in bytes */
40 int frame_samples
;/* Samples per frame */
41 int ft_num
; /* Numerator of frametime in milliseconds */
42 int ft_den
; /* Denominator of frametime in milliseconds */
44 bool is_vbr
; /* True if the file is VBR */
45 bool has_toc
; /* True if there is a VBR header in the file */
46 unsigned char toc
[100];
47 unsigned long frame_count
; /* Number of frames in the file (if VBR) */
48 unsigned long byte_count
; /* File size in bytes */
49 unsigned long file_time
; /* Length of the whole file in milliseconds */
50 int enc_delay
; /* Encoder delay, fetched from LAME header */
51 int enc_padding
; /* Padded samples added to last frame. LAME header */
54 /* Xing header information */
55 #define VBR_FRAMES_FLAG 0x01
56 #define VBR_BYTES_FLAG 0x02
57 #define VBR_TOC_FLAG 0x04
58 #define VBR_QUALITY_FLAG 0x08
60 #define MAX_XING_HEADER_SIZE 576
62 unsigned long find_next_frame(int fd
,
65 unsigned long reference_header
);
66 unsigned long mem_find_next_frame(int startpos
,
69 unsigned long reference_header
,
70 unsigned char* buf
, size_t buflen
);
71 int get_mp3file_info(int fd
,
72 struct mp3info
*info
);
74 int count_mp3_frames(int fd
, int startpos
, int filesize
,
75 void (*progressfunc
)(int),
76 unsigned char* buf
, size_t buflen
);
78 int create_xing_header(int fd
, long startpos
, long filesize
,
79 unsigned char *buf
, unsigned long num_frames
,
80 unsigned long rec_time
, unsigned long header_template
,
81 void (*progressfunc
)(int), bool generate_toc
,
82 unsigned char *tempbuf
, size_t tempbuflen
);
84 extern unsigned long bytes2int(unsigned long b0
,