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Diffstat (limited to 'lib/rbcodec/metadata/mp3data.h')
| -rw-r--r-- | lib/rbcodec/metadata/mp3data.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/rbcodec/metadata/mp3data.h b/lib/rbcodec/metadata/mp3data.h new file mode 100644 index 0000000..762c2f4 --- /dev/null +++ b/lib/rbcodec/metadata/mp3data.h @@ -0,0 +1,89 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2002 by Linus Nielsen Feltzing + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * 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 + +#include <string.h> /* size_t */ + +struct mp3info { + /* Standard MP3 frame header fields */ + int version; + int layer; + int bitrate; + long frequency; + int padding; + int channel_mode; + 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 */ + 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 */ + 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 reference_header); +unsigned long mem_find_next_frame(int startpos, + long *offset, + long max_offset, + unsigned long reference_header, + unsigned char* buf, size_t buflen); +int get_mp3file_info(int fd, + struct mp3info *info); + +int count_mp3_frames(int fd, int startpos, int filesize, + void (*progressfunc)(int), + unsigned char* buf, size_t buflen); + +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, + unsigned char *tempbuf, size_t tempbuflen ); + +extern unsigned long bytes2int(unsigned long b0, + unsigned long b1, + unsigned long b2, + unsigned long b3); + +#endif |