len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2025-12-09 13:15:18 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

New ID3 and MP3 stream parser, plus not-yet-ready Xing header generation code

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3410 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2003-03-10 14:55:31 +00:00
parent 22cbe938fe
commit a039091187
8 changed files with 1016 additions and 425 deletions
Download patch file Download diff file Expand all files Collapse all files

66
firmware/export/mp3data.h Normal file
View file

@ -0,0 +1,66 @@
/***************************************************************************
* __________ __ ___.
* 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_VERSION2_5 0
#define MPEG_VERSION1 1
#define MPEG_VERSION2 2
struct mp3info {
/* Standard MP3 frame header fields */
int version;
int layer;
bool protection;
int bitrate;
int frequency;
int padding;
int channel_mode;
int mode_extension;
int emphasis;
int frame_size; /* Frame size in bytes */
int frame_time; /* Frame duration 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];
int frame_count; /* Number of frames in the file (if VBR) */
int byte_count; /* File size in bytes */
int file_time; /* Length of the whole file in milliseconds */
int xing_header_pos;
};
/* Xing header information */
#define VBR_FRAMES_FLAG 0x01
#define VBR_BYTES_FLAG 0x02
#define VBR_TOC_FLAG 0x04
unsigned long find_next_frame(int fd, int *offset, int 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, int startpos, int filesize,
unsigned char *buf, int num_frames,
void (*progressfunc)(int));
#endif