1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2002 by Linus Nielsen Feltzing
12 * All files in this archive are subject to the GNU General Public License.
13 * See the file COPYING in the source tree root for full license agreement.
15 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
16 * KIND, either express or implied.
18 ****************************************************************************/
23 #define MPEG_VERSION1 0
24 #define MPEG_VERSION2 1
25 #define MPEG_VERSION2_5 2
28 /* Standard MP3 frame header fields */
38 int frame_size
; /* Frame size in bytes */
39 int frame_samples
; /* Samples per frame */
40 int ft_num
; /* Numerator of frametime in milliseconds */
41 int ft_den
; /* Denominator of frametime in milliseconds */
43 bool is_vbr
; /* True if the file is VBR */
44 bool has_toc
; /* True if there is a VBR header in the file */
45 bool is_xing_vbr
; /* True if the VBR header is of Xing type */
46 bool is_vbri_vbr
; /* True if the VBR header is of VBRI type */
47 unsigned char toc
[100];
48 unsigned long frame_count
; /* Number of frames in the file (if VBR) */
49 unsigned long byte_count
; /* File size in bytes */
50 unsigned long file_time
; /* Length of the whole file in milliseconds */
51 unsigned long vbr_header_pos
;
52 int enc_delay
; /* Encoder delay, fetched from LAME header */
53 int enc_padding
; /* Padded samples added to last frame. LAME header */
56 /* Xing header information */
57 #define VBR_FRAMES_FLAG 0x01
58 #define VBR_BYTES_FLAG 0x02
59 #define VBR_TOC_FLAG 0x04
60 #define VBR_QUALITY_FLAG 0x08
62 #define MAX_XING_HEADER_SIZE 576
64 unsigned long find_next_frame(int fd
, long *offset
, long max_offset
,
65 unsigned long last_header
);
66 unsigned long mem_find_next_frame(int startpos
, long *offset
, long max_offset
,
67 unsigned long last_header
);
68 int get_mp3file_info(int fd
, struct mp3info
*info
);
69 int count_mp3_frames(int fd
, int startpos
, int filesize
,
70 void (*progressfunc
)(int));
71 int create_xing_header(int fd
, long startpos
, long filesize
,
72 unsigned char *buf
, unsigned long num_frames
,
73 unsigned long rec_time
, unsigned long header_template
,
74 void (*progressfunc
)(int), bool generate_toc
);
76 extern unsigned long bytes2int(unsigned long b0
,