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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _MP3DATA_H_
#define _MP3DATA_H_
#define MPEG_VERSION1 0
#define MPEG_VERSION2 1
#define MPEG_VERSION2_5 2
struct mp3info {
/* Standard MP3 frame header fields */
int version;
int layer;
bool protection;
int bitrate;
long frequency;
int padding;
int channel_mode;
int mode_extension;
int emphasis;
int frame_size; /* Frame size in bytes */
int frame_samples; /* Samples per frame */
int ft_num; /* Numerator of frametime in milliseconds */
int ft_den; /* Denominator of frametime in milliseconds */
bool is_vbr; /* True if the file is VBR */
bool has_toc; /* True if there is a VBR header in the file */
bool is_xing_vbr; /* True if the VBR header is of Xing type */
bool is_vbri_vbr; /* True if the VBR header is of VBRI type */
unsigned char toc[100];
unsigned long frame_count; /* Number of frames in the file (if VBR) */
unsigned long byte_count; /* File size in bytes */
unsigned long file_time; /* Length of the whole file in milliseconds */
unsigned long vbr_header_pos;
int enc_delay; /* Encoder delay, fetched from LAME header */
int enc_padding; /* Padded samples added to last frame. LAME header */
};
/* Xing header information */
#define VBR_FRAMES_FLAG 0x01
#define VBR_BYTES_FLAG 0x02
#define VBR_TOC_FLAG 0x04
#define VBR_QUALITY_FLAG 0x08
#define MAX_XING_HEADER_SIZE 576
unsigned long find_next_frame(int fd, long *offset, long max_offset,
unsigned long last_header);
unsigned long mem_find_next_frame(int startpos, long *offset, long max_offset,
unsigned long last_header);
int get_mp3file_info(int fd, struct mp3info *info);
int count_mp3_frames(int fd, int startpos, int filesize,
void (*progressfunc)(int));
int create_xing_header(int fd, long startpos, long filesize,
unsigned char *buf, unsigned long num_frames,
unsigned long rec_time, unsigned long header_template,
void (*progressfunc)(int), bool generate_toc);
extern unsigned long bytes2int(unsigned long b0,
unsigned long b1,
unsigned long b2,
unsigned long b3);
#endif
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