51b45d5602
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18814 a1c6a512-1295-4272-9138-f99709370657
83 lines
3.2 KiB
C
83 lines
3.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Linus Nielsen Feltzing
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _MP3DATA_H_
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#define _MP3DATA_H_
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#define MPEG_VERSION1 0
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#define MPEG_VERSION2 1
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#define MPEG_VERSION2_5 2
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struct mp3info {
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/* Standard MP3 frame header fields */
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int version;
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int layer;
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bool protection;
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int bitrate;
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long frequency;
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int padding;
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int channel_mode;
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int mode_extension;
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int emphasis;
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int frame_size; /* Frame size in bytes */
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int frame_samples; /* Samples per frame */
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int ft_num; /* Numerator of frametime in milliseconds */
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int ft_den; /* Denominator of frametime in milliseconds */
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bool is_vbr; /* True if the file is VBR */
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bool has_toc; /* True if there is a VBR header in the file */
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bool is_xing_vbr; /* True if the VBR header is of Xing type */
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bool is_vbri_vbr; /* True if the VBR header is of VBRI type */
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unsigned char toc[100];
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unsigned long frame_count; /* Number of frames in the file (if VBR) */
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unsigned long byte_count; /* File size in bytes */
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unsigned long file_time; /* Length of the whole file in milliseconds */
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unsigned long vbr_header_pos;
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int enc_delay; /* Encoder delay, fetched from LAME header */
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int enc_padding; /* Padded samples added to last frame. LAME header */
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};
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/* Xing header information */
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#define VBR_FRAMES_FLAG 0x01
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#define VBR_BYTES_FLAG 0x02
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#define VBR_TOC_FLAG 0x04
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#define VBR_QUALITY_FLAG 0x08
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#define MAX_XING_HEADER_SIZE 576
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unsigned long find_next_frame(int fd, long *offset, long max_offset,
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unsigned long last_header);
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unsigned long mem_find_next_frame(int startpos, long *offset, long max_offset,
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unsigned long last_header);
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int get_mp3file_info(int fd, struct mp3info *info);
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int count_mp3_frames(int fd, int startpos, int filesize,
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void (*progressfunc)(int));
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int create_xing_header(int fd, long startpos, long filesize,
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unsigned char *buf, unsigned long num_frames,
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unsigned long rec_time, unsigned long header_template,
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void (*progressfunc)(int), bool generate_toc);
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extern unsigned long bytes2int(unsigned long b0,
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unsigned long b1,
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unsigned long b2,
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unsigned long b3);
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#endif
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