streo mp3 player see: http://mbed.org/users/okini3939/notebook/I2S_AUDIO
Dependencies: FatFileSystemCpp I2SSlave TLV320 mbed
Fork of madplayer by
stream.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?
User | Revision | Line number | New 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: stream.h,v 1.1 2010/11/23 20:12:57 andy Exp $ |
Gruenfrosch | 0:7627c79db971 | 20 | */ |
Gruenfrosch | 0:7627c79db971 | 21 | |
Gruenfrosch | 0:7627c79db971 | 22 | # ifndef LIBMAD_STREAM_H |
Gruenfrosch | 0:7627c79db971 | 23 | # define LIBMAD_STREAM_H |
Gruenfrosch | 0:7627c79db971 | 24 | |
Gruenfrosch | 0:7627c79db971 | 25 | # include "bit.h" |
Gruenfrosch | 0:7627c79db971 | 26 | |
Gruenfrosch | 0:7627c79db971 | 27 | # define MAD_BUFFER_GUARD 8 |
Gruenfrosch | 0:7627c79db971 | 28 | # define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD) |
Gruenfrosch | 0:7627c79db971 | 29 | |
Gruenfrosch | 0:7627c79db971 | 30 | enum mad_error { |
Gruenfrosch | 0:7627c79db971 | 31 | MAD_ERROR_NONE = 0x0000, /* no error */ |
Gruenfrosch | 0:7627c79db971 | 32 | |
Gruenfrosch | 0:7627c79db971 | 33 | MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */ |
Gruenfrosch | 0:7627c79db971 | 34 | MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */ |
Gruenfrosch | 0:7627c79db971 | 35 | |
Gruenfrosch | 0:7627c79db971 | 36 | MAD_ERROR_NOMEM = 0x0031, /* not enough memory */ |
Gruenfrosch | 0:7627c79db971 | 37 | |
Gruenfrosch | 0:7627c79db971 | 38 | MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */ |
Gruenfrosch | 0:7627c79db971 | 39 | MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */ |
Gruenfrosch | 0:7627c79db971 | 40 | MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */ |
Gruenfrosch | 0:7627c79db971 | 41 | MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */ |
Gruenfrosch | 0:7627c79db971 | 42 | MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */ |
Gruenfrosch | 0:7627c79db971 | 43 | |
Gruenfrosch | 0:7627c79db971 | 44 | MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */ |
Gruenfrosch | 0:7627c79db971 | 45 | MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */ |
Gruenfrosch | 0:7627c79db971 | 46 | MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */ |
Gruenfrosch | 0:7627c79db971 | 47 | MAD_ERROR_BADMODE = 0x0222, /* bad bitrate/mode combination */ |
Gruenfrosch | 0:7627c79db971 | 48 | MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */ |
Gruenfrosch | 0:7627c79db971 | 49 | MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */ |
Gruenfrosch | 0:7627c79db971 | 50 | MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */ |
Gruenfrosch | 0:7627c79db971 | 51 | MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */ |
Gruenfrosch | 0:7627c79db971 | 52 | MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */ |
Gruenfrosch | 0:7627c79db971 | 53 | MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */ |
Gruenfrosch | 0:7627c79db971 | 54 | MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */ |
Gruenfrosch | 0:7627c79db971 | 55 | MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */ |
Gruenfrosch | 0:7627c79db971 | 56 | MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */ |
Gruenfrosch | 0:7627c79db971 | 57 | }; |
Gruenfrosch | 0:7627c79db971 | 58 | |
Gruenfrosch | 0:7627c79db971 | 59 | # define MAD_RECOVERABLE(error) ((error) & 0xff00) |
Gruenfrosch | 0:7627c79db971 | 60 | |
Gruenfrosch | 0:7627c79db971 | 61 | struct mad_stream { |
Gruenfrosch | 0:7627c79db971 | 62 | unsigned char const *buffer; /* input bitstream buffer */ |
Gruenfrosch | 0:7627c79db971 | 63 | unsigned char const *bufend; /* end of buffer */ |
Gruenfrosch | 0:7627c79db971 | 64 | unsigned long skiplen; /* bytes to skip before next frame */ |
Gruenfrosch | 0:7627c79db971 | 65 | |
Gruenfrosch | 0:7627c79db971 | 66 | int sync; /* stream sync found */ |
Gruenfrosch | 0:7627c79db971 | 67 | unsigned long freerate; /* free bitrate (fixed) */ |
Gruenfrosch | 0:7627c79db971 | 68 | |
Gruenfrosch | 0:7627c79db971 | 69 | unsigned char const *this_frame; /* start of current frame */ |
Gruenfrosch | 0:7627c79db971 | 70 | unsigned char const *next_frame; /* start of next frame */ |
Gruenfrosch | 0:7627c79db971 | 71 | struct mad_bitptr ptr; /* current processing bit pointer */ |
Gruenfrosch | 0:7627c79db971 | 72 | |
Gruenfrosch | 0:7627c79db971 | 73 | struct mad_bitptr anc_ptr; /* ancillary bits pointer */ |
Gruenfrosch | 0:7627c79db971 | 74 | unsigned int anc_bitlen; /* number of ancillary bits */ |
Gruenfrosch | 0:7627c79db971 | 75 | |
Gruenfrosch | 0:7627c79db971 | 76 | unsigned char (*main_data)[MAD_BUFFER_MDLEN]; |
Gruenfrosch | 0:7627c79db971 | 77 | /* Layer III main_data() */ |
Gruenfrosch | 0:7627c79db971 | 78 | unsigned int md_len; /* bytes in main_data */ |
Gruenfrosch | 0:7627c79db971 | 79 | |
Gruenfrosch | 0:7627c79db971 | 80 | int options; /* decoding options (see below) */ |
Gruenfrosch | 0:7627c79db971 | 81 | enum mad_error error; /* error code (see above) */ |
Gruenfrosch | 0:7627c79db971 | 82 | }; |
Gruenfrosch | 0:7627c79db971 | 83 | |
Gruenfrosch | 0:7627c79db971 | 84 | enum { |
Gruenfrosch | 0:7627c79db971 | 85 | MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */ |
Gruenfrosch | 0:7627c79db971 | 86 | MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */ |
Gruenfrosch | 0:7627c79db971 | 87 | # if 0 /* not yet implemented */ |
Gruenfrosch | 0:7627c79db971 | 88 | MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */ |
Gruenfrosch | 0:7627c79db971 | 89 | MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */ |
Gruenfrosch | 0:7627c79db971 | 90 | MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */ |
Gruenfrosch | 0:7627c79db971 | 91 | # endif |
Gruenfrosch | 0:7627c79db971 | 92 | }; |
Gruenfrosch | 0:7627c79db971 | 93 | |
Gruenfrosch | 0:7627c79db971 | 94 | void mad_stream_init(struct mad_stream *); |
Gruenfrosch | 0:7627c79db971 | 95 | void mad_stream_finish(struct mad_stream *); |
Gruenfrosch | 0:7627c79db971 | 96 | |
Gruenfrosch | 0:7627c79db971 | 97 | # define mad_stream_options(stream, opts) \ |
Gruenfrosch | 0:7627c79db971 | 98 | ((void) ((stream)->options = (opts))) |
Gruenfrosch | 0:7627c79db971 | 99 | |
Gruenfrosch | 0:7627c79db971 | 100 | void mad_stream_buffer(struct mad_stream *, |
Gruenfrosch | 0:7627c79db971 | 101 | unsigned char const *, unsigned long); |
Gruenfrosch | 0:7627c79db971 | 102 | void mad_stream_skip(struct mad_stream *, unsigned long); |
Gruenfrosch | 0:7627c79db971 | 103 | |
Gruenfrosch | 0:7627c79db971 | 104 | int mad_stream_sync(struct mad_stream *); |
Gruenfrosch | 0:7627c79db971 | 105 | |
Gruenfrosch | 0:7627c79db971 | 106 | char const *mad_stream_errorstr(struct mad_stream const *); |
Gruenfrosch | 0:7627c79db971 | 107 | |
Gruenfrosch | 0:7627c79db971 | 108 | # endif |