Andreas Grün / Mbed 2 deprecated madplayer

MP3 Player without external hardware MP3 Player without external hardware. A software based MP3 player based on a modified version of libmad. Mono output (at the moment) via AnalogOut. Files are read from an USB drive. This is a demo program, it plays only one file at the moment. Documentation is in "main.cpp" and "config.h"

Dependencies:   mbed

sf_table.h@2:f28cf0afd021, 2010-11-27 (annotated)

Committer:
Gruenfrosch
Date:
Sat Nov 27 17:27:33 2010 +0000
Revision:
2:f28cf0afd021
Parent:
0:7627c79db971 
Version 3:

 * moved another memory block into AHB RAM, giving more room for

 * stereo buffer.

 * moved content of decode() to main()

 * decoding	is now safe to be called multiple times (bug in older versions)

 * Output routine now fills stereo buffer, DAC output sums channels,

 * just for demonstration that stereo output could go here

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Gruenfrosch 0:7627c79db971 1 /*
Gruenfrosch 0:7627c79db971 2 * libmad - MPEG audio decoder library
Gruenfrosch 0:7627c79db971 3 * Copyright (C) 2000-2004 Underbit Technologies, Inc.
Gruenfrosch 0:7627c79db971 4 *
Gruenfrosch 0:7627c79db971 5 * This program is free software; you can redistribute it and/or modify
Gruenfrosch 0:7627c79db971 6 * it under the terms of the GNU General Public License as published by
Gruenfrosch 0:7627c79db971 7 * the Free Software Foundation; either version 2 of the License, or
Gruenfrosch 0:7627c79db971 8 * (at your option) any later version.
Gruenfrosch 0:7627c79db971 9 *
Gruenfrosch 0:7627c79db971 10 * This program is distributed in the hope that it will be useful,
Gruenfrosch 0:7627c79db971 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Gruenfrosch 0:7627c79db971 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Gruenfrosch 0:7627c79db971 13 * GNU General Public License for more details.
Gruenfrosch 0:7627c79db971 14 *
Gruenfrosch 0:7627c79db971 15 * You should have received a copy of the GNU General Public License
Gruenfrosch 0:7627c79db971 16 * along with this program; if not, write to the Free Software
Gruenfrosch 0:7627c79db971 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Gruenfrosch 0:7627c79db971 18 *
Gruenfrosch 0:7627c79db971 19 * $Id: sf_table.c,v 1.1 2010/11/23 20:12:57 andy Exp $
Gruenfrosch 0:7627c79db971 20 */
Gruenfrosch 0:7627c79db971 21
Gruenfrosch 0:7627c79db971 22 /*
Gruenfrosch 0:7627c79db971 23 * These are the scalefactor values for Layer I and Layer II.
Gruenfrosch 0:7627c79db971 24 * The values are from Table B.1 of ISO/IEC 11172-3.
Gruenfrosch 0:7627c79db971 25 *
Gruenfrosch 0:7627c79db971 26 * There is some error introduced by the 32-bit fixed-point representation;
Gruenfrosch 0:7627c79db971 27 * the amount of error is shown. For 16-bit PCM output, this shouldn't be
Gruenfrosch 0:7627c79db971 28 * too much of a problem.
Gruenfrosch 0:7627c79db971 29 *
Gruenfrosch 0:7627c79db971 30 * Strictly speaking, Table B.1 has only 63 entries (0-62), thus a strict
Gruenfrosch 0:7627c79db971 31 * interpretation of ISO/IEC 11172-3 would suggest that a scalefactor index of
Gruenfrosch 0:7627c79db971 32 * 63 is invalid. However, for better compatibility with current practices, we
Gruenfrosch 0:7627c79db971 33 * add a 64th entry.
Gruenfrosch 0:7627c79db971 34 */
Gruenfrosch 0:7627c79db971 35 static
Gruenfrosch 0:7627c79db971 36 mad_fixed_t const sf_table[64] = {
Gruenfrosch 0:7627c79db971 37
Gruenfrosch 0:7627c79db971 38 MAD_F(0x20000000), /* 2.000000000000 => 2.000000000000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 39 MAD_F(0x1965fea5), /* 1.587401051968 => 1.587401051074, e 0.000000000894 */
Gruenfrosch 0:7627c79db971 40 MAD_F(0x1428a2fa), /* 1.259921049895 => 1.259921051562, e -0.000000001667 */
Gruenfrosch 0:7627c79db971 41 MAD_F(0x10000000), /* 1.000000000000 => 1.000000000000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 42 MAD_F(0x0cb2ff53), /* 0.793700525984 => 0.793700527400, e -0.000000001416 */
Gruenfrosch 0:7627c79db971 43 MAD_F(0x0a14517d), /* 0.629960524947 => 0.629960525781, e -0.000000000833 */
Gruenfrosch 0:7627c79db971 44 MAD_F(0x08000000), /* 0.500000000000 => 0.500000000000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 45 MAD_F(0x06597fa9), /* 0.396850262992 => 0.396850261837, e 0.000000001155 */
Gruenfrosch 0:7627c79db971 46
Gruenfrosch 0:7627c79db971 47 MAD_F(0x050a28be), /* 0.314980262474 => 0.314980261028, e 0.000000001446 */
Gruenfrosch 0:7627c79db971 48 MAD_F(0x04000000), /* 0.250000000000 => 0.250000000000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 49 MAD_F(0x032cbfd5), /* 0.198425131496 => 0.198425132781, e -0.000000001285 */
Gruenfrosch 0:7627c79db971 50 MAD_F(0x0285145f), /* 0.157490131237 => 0.157490130514, e 0.000000000723 */
Gruenfrosch 0:7627c79db971 51 MAD_F(0x02000000), /* 0.125000000000 => 0.125000000000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 52 MAD_F(0x01965fea), /* 0.099212565748 => 0.099212564528, e 0.000000001220 */
Gruenfrosch 0:7627c79db971 53 MAD_F(0x01428a30), /* 0.078745065618 => 0.078745067120, e -0.000000001501 */
Gruenfrosch 0:7627c79db971 54 MAD_F(0x01000000), /* 0.062500000000 => 0.062500000000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 55
Gruenfrosch 0:7627c79db971 56 MAD_F(0x00cb2ff5), /* 0.049606282874 => 0.049606282264, e 0.000000000610 */
Gruenfrosch 0:7627c79db971 57 MAD_F(0x00a14518), /* 0.039372532809 => 0.039372533560, e -0.000000000751 */
Gruenfrosch 0:7627c79db971 58 MAD_F(0x00800000), /* 0.031250000000 => 0.031250000000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 59 MAD_F(0x006597fb), /* 0.024803141437 => 0.024803142995, e -0.000000001558 */
Gruenfrosch 0:7627c79db971 60 MAD_F(0x0050a28c), /* 0.019686266405 => 0.019686266780, e -0.000000000375 */
Gruenfrosch 0:7627c79db971 61 MAD_F(0x00400000), /* 0.015625000000 => 0.015625000000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 62 MAD_F(0x0032cbfd), /* 0.012401570719 => 0.012401569635, e 0.000000001084 */
Gruenfrosch 0:7627c79db971 63 MAD_F(0x00285146), /* 0.009843133202 => 0.009843133390, e -0.000000000188 */
Gruenfrosch 0:7627c79db971 64
Gruenfrosch 0:7627c79db971 65 MAD_F(0x00200000), /* 0.007812500000 => 0.007812500000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 66 MAD_F(0x001965ff), /* 0.006200785359 => 0.006200786680, e -0.000000001321 */
Gruenfrosch 0:7627c79db971 67 MAD_F(0x001428a3), /* 0.004921566601 => 0.004921566695, e -0.000000000094 */
Gruenfrosch 0:7627c79db971 68 MAD_F(0x00100000), /* 0.003906250000 => 0.003906250000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 69 MAD_F(0x000cb2ff), /* 0.003100392680 => 0.003100391477, e 0.000000001202 */
Gruenfrosch 0:7627c79db971 70 MAD_F(0x000a1451), /* 0.002460783301 => 0.002460781485, e 0.000000001816 */
Gruenfrosch 0:7627c79db971 71 MAD_F(0x00080000), /* 0.001953125000 => 0.001953125000, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 72 MAD_F(0x00065980), /* 0.001550196340 => 0.001550197601, e -0.000000001262 */
Gruenfrosch 0:7627c79db971 73
Gruenfrosch 0:7627c79db971 74 MAD_F(0x00050a29), /* 0.001230391650 => 0.001230392605, e -0.000000000955 */
Gruenfrosch 0:7627c79db971 75 MAD_F(0x00040000), /* 0.000976562500 => 0.000976562500, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 76 MAD_F(0x00032cc0), /* 0.000775098170 => 0.000775098801, e -0.000000000631 */
Gruenfrosch 0:7627c79db971 77 MAD_F(0x00028514), /* 0.000615195825 => 0.000615194440, e 0.000000001385 */
Gruenfrosch 0:7627c79db971 78 MAD_F(0x00020000), /* 0.000488281250 => 0.000488281250, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 79 MAD_F(0x00019660), /* 0.000387549085 => 0.000387549400, e -0.000000000315 */
Gruenfrosch 0:7627c79db971 80 MAD_F(0x0001428a), /* 0.000307597913 => 0.000307597220, e 0.000000000693 */
Gruenfrosch 0:7627c79db971 81 MAD_F(0x00010000), /* 0.000244140625 => 0.000244140625, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 82
Gruenfrosch 0:7627c79db971 83 MAD_F(0x0000cb30), /* 0.000193774542 => 0.000193774700, e -0.000000000158 */
Gruenfrosch 0:7627c79db971 84 MAD_F(0x0000a145), /* 0.000153798956 => 0.000153798610, e 0.000000000346 */
Gruenfrosch 0:7627c79db971 85 MAD_F(0x00008000), /* 0.000122070313 => 0.000122070313, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 86 MAD_F(0x00006598), /* 0.000096887271 => 0.000096887350, e -0.000000000079 */
Gruenfrosch 0:7627c79db971 87 MAD_F(0x000050a3), /* 0.000076899478 => 0.000076901168, e -0.000000001689 */
Gruenfrosch 0:7627c79db971 88 MAD_F(0x00004000), /* 0.000061035156 => 0.000061035156, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 89 MAD_F(0x000032cc), /* 0.000048443636 => 0.000048443675, e -0.000000000039 */
Gruenfrosch 0:7627c79db971 90 MAD_F(0x00002851), /* 0.000038449739 => 0.000038448721, e 0.000000001018 */
Gruenfrosch 0:7627c79db971 91
Gruenfrosch 0:7627c79db971 92 MAD_F(0x00002000), /* 0.000030517578 => 0.000030517578, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 93 MAD_F(0x00001966), /* 0.000024221818 => 0.000024221838, e -0.000000000020 */
Gruenfrosch 0:7627c79db971 94 MAD_F(0x00001429), /* 0.000019224870 => 0.000019226223, e -0.000000001354 */
Gruenfrosch 0:7627c79db971 95 MAD_F(0x00001000), /* 0.000015258789 => 0.000015258789, e -0.000000000000 */
Gruenfrosch 0:7627c79db971 96 MAD_F(0x00000cb3), /* 0.000012110909 => 0.000012110919, e -0.000000000010 */
Gruenfrosch 0:7627c79db971 97 MAD_F(0x00000a14), /* 0.000009612435 => 0.000009611249, e 0.000000001186 */
Gruenfrosch 0:7627c79db971 98 MAD_F(0x00000800), /* 0.000007629395 => 0.000007629395, e -0.000000000000 */
Gruenfrosch 0:7627c79db971 99 MAD_F(0x00000659), /* 0.000006055454 => 0.000006053597, e 0.000000001858 */
Gruenfrosch 0:7627c79db971 100
Gruenfrosch 0:7627c79db971 101 MAD_F(0x0000050a), /* 0.000004806217 => 0.000004805624, e 0.000000000593 */
Gruenfrosch 0:7627c79db971 102 MAD_F(0x00000400), /* 0.000003814697 => 0.000003814697, e 0.000000000000 */
Gruenfrosch 0:7627c79db971 103 MAD_F(0x0000032d), /* 0.000003027727 => 0.000003028661, e -0.000000000934 */
Gruenfrosch 0:7627c79db971 104 MAD_F(0x00000285), /* 0.000002403109 => 0.000002402812, e 0.000000000296 */
Gruenfrosch 0:7627c79db971 105 MAD_F(0x00000200), /* 0.000001907349 => 0.000001907349, e -0.000000000000 */
Gruenfrosch 0:7627c79db971 106 MAD_F(0x00000196), /* 0.000001513864 => 0.000001512468, e 0.000000001396 */
Gruenfrosch 0:7627c79db971 107 MAD_F(0x00000143), /* 0.000001201554 => 0.000001203269, e -0.000000001714 */
Gruenfrosch 0:7627c79db971 108 MAD_F(0x00000000) /* this compatibility entry is not part of Table B.1 */
Gruenfrosch 0:7627c79db971 109 };