MP3 Player. You can change fwd/rev speed and skip. see: http://mbed.org/users/okini3939/notebook/lpc4088_madplayer/
Dependencies: I2SSlave SDFileSystem TLV320 mbed
frame.h
00001 /* 00002 * libmad - MPEG audio decoder library 00003 * Copyright (C) 2000-2004 Underbit Technologies, Inc. 00004 * 00005 * This program is free software; you can redistribute it and/or modify 00006 * it under the terms of the GNU General Public License as published by 00007 * the Free Software Foundation; either version 2 of the License, or 00008 * (at your option) any later version. 00009 * 00010 * This program is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 * GNU General Public License for more details. 00014 * 00015 * You should have received a copy of the GNU General Public License 00016 * along with this program; if not, write to the Free Software 00017 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00018 * 00019 * $Id: frame.h,v 1.1 2010/11/23 20:12:57 andy Exp $ 00020 */ 00021 00022 # ifndef LIBMAD_FRAME_H 00023 # define LIBMAD_FRAME_H 00024 00025 # include "fixed.h" 00026 # include "timer.h" 00027 # include "stream.h" 00028 00029 enum mad_layer { 00030 MAD_LAYER_I = 1, /* Layer I */ 00031 MAD_LAYER_II = 2, /* Layer II */ 00032 MAD_LAYER_III = 3 /* Layer III */ 00033 }; 00034 00035 enum mad_mode { 00036 MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */ 00037 MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */ 00038 MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */ 00039 MAD_MODE_STEREO = 3 /* normal LR stereo */ 00040 }; 00041 00042 enum mad_emphasis { 00043 MAD_EMPHASIS_NONE = 0, /* no emphasis */ 00044 MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */ 00045 MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */ 00046 MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */ 00047 }; 00048 00049 struct mad_header { 00050 enum mad_layer layer; /* audio layer (1, 2, or 3) */ 00051 enum mad_mode mode; /* channel mode (see above) */ 00052 int mode_extension; /* additional mode info */ 00053 enum mad_emphasis emphasis; /* de-emphasis to use (see above) */ 00054 00055 unsigned long bitrate; /* stream bitrate (bps) */ 00056 unsigned int samplerate; /* sampling frequency (Hz) */ 00057 00058 unsigned short crc_check; /* frame CRC accumulator */ 00059 unsigned short crc_target; /* final target CRC checksum */ 00060 00061 int flags; /* flags (see below) */ 00062 int private_bits; /* private bits (see below) */ 00063 00064 mad_timer_t duration; /* audio playing time of frame */ 00065 }; 00066 00067 struct mad_frame { 00068 struct mad_header header; /* MPEG audio header */ 00069 00070 int options; /* decoding options (from stream) */ 00071 00072 mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */ 00073 mad_fixed_t overlap[2][32][18]; /* Layer III block overlap data */ 00074 }; 00075 00076 # define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1) 00077 # define MAD_NSBSAMPLES(header) \ 00078 ((header)->layer == MAD_LAYER_I ? 12 : \ 00079 (((header)->layer == MAD_LAYER_III && \ 00080 ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36)) 00081 00082 enum { 00083 MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */ 00084 MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */ 00085 00086 MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */ 00087 MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */ 00088 MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */ 00089 MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */ 00090 00091 MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */ 00092 MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */ 00093 MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */ 00094 00095 MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */ 00096 MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */ 00097 MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */ 00098 }; 00099 00100 enum { 00101 MAD_PRIVATE_HEADER = 0x0100, /* header private bit */ 00102 MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */ 00103 }; 00104 00105 void mad_header_init(struct mad_header *); 00106 00107 # define mad_header_finish(header) /* nothing */ 00108 00109 int mad_header_decode(struct mad_header *, struct mad_stream *); 00110 00111 void mad_frame_init(struct mad_frame *); 00112 void mad_frame_finish(struct mad_frame *); 00113 00114 int mad_frame_decode(struct mad_frame *, struct mad_stream *); 00115 00116 void mad_frame_mute(struct mad_frame *); 00117 00118 # endif
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