1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/********************************************************************
*
* Copyright (c) 2002 Artur Polaczynski (Ar't) All rights reserved.
* <artii@o2.pl> LGPL-2.1
* $ArtId: info_mpc.c,v 1.12 2003/04/13 11:24:10 art Exp $
********************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
Some portions of code or/and ideas come from
winamp plugins, xmms plugins, mppdec decoder
thanks:
-Frank Klemm <Frank.Klemm@uni-jena.de>
-Andree Buschmann <Andree.Buschmann@web.de>
-Thomas Juerges <thomas.juerges@astro.ruhr-uni-bochum.de>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "info_mpc.h"
#include "is_tag.h"
/*
*.MPC,*.MP+,*.MPP
*/
static const char *
profile_stringify(unsigned int profile); // profile is 0...15, where 7...13 is used
static const char *
profile_stringify(unsigned int profile) // profile is 0...15, where 7...13 is used
{
static const char na[] = "n.a.";
static const char *Names[] = {
na, "Experimental", na, na,
na, na, na, "Telephone",
"Thumb", "Radio", "Standard", "Xtreme",
"Insane", "BrainDead", "BrainDead+", "BrainDead++"
};
return profile >=
sizeof (Names) / sizeof (*Names) ? na : Names[profile];
}
int
read_file_header_fp(FILE *fp, StreamInfoMpc * Info)
{
return 0;
}
/*
return 0; Info has all info
return 1; File not found
return 2; no Mpc file
*/
int
info_mpc_read(const char *fn, StreamInfoMpc * Info)
{
unsigned int HeaderData[16];
FILE *tmpFile = NULL;
long SkipSizeID3;
// load file
tmpFile = fopen(fn, "rb");
if (tmpFile == NULL)
return 1; // file not found or read-protected
// skip id3v2
SkipSizeID3=is_id3v2(tmpFile);
fseek(tmpFile,SkipSizeID3 , SEEK_SET);
fread((void *) HeaderData, sizeof (int), 16, tmpFile);
fseek(tmpFile, 0, SEEK_END);
Info->FileSize=ftell(tmpFile);
// stream size
Info->ByteLength = Info->FileSize-is_id3v1(tmpFile)-is_ape(tmpFile)-SkipSizeID3;
fclose(tmpFile);
if (0 != memcmp(HeaderData, "MP+", 3))
return 2; // no musepack file
Info->StreamVersion = HeaderData[0] >> 24;
if (Info->StreamVersion >= 7) {
const long samplefreqs[4] = { 44100, 48000, 37800, 32000 };
// read the file-header (SV7 and above)
Info->Bitrate = 0;
Info->Frames = HeaderData[1];
Info->SampleFreq = samplefreqs[(HeaderData[2] >> 16) & 0x0003];
Info->MaxBand = (HeaderData[2] >> 24) & 0x003F;
Info->MS = (HeaderData[2] >> 30) & 0x0001;
Info->Profile = (HeaderData[2] << 8) >> 28;
Info->IS = (HeaderData[2] >> 31) & 0x0001;
Info->BlockSize = 1;
Info->EncoderVersion = (HeaderData[6] >> 24) & 0x00FF;
Info->Channels = 2;
// gain
Info->EstPeakTitle = HeaderData[2] & 0xFFFF; // read the ReplayGain data
Info->GainTitle = (HeaderData[3] >> 16) & 0xFFFF;
Info->PeakTitle = HeaderData[3] & 0xFFFF;
Info->GainAlbum = (HeaderData[4] >> 16) & 0xFFFF;
Info->PeakAlbum = HeaderData[4] & 0xFFFF;
// gaples
Info->IsTrueGapless = (HeaderData[5] >> 31) & 0x0001; // true gapless: used?
Info->LastFrameSamples = (HeaderData[5] >> 20) & 0x07FF; // true gapless: valid samples for last frame
if (Info->EncoderVersion == 0) {
sprintf(Info->Encoder, "<= 1.05"); // Buschmann 1.7.x, Klemm <= 1.05
} else {
switch (Info->EncoderVersion % 10) {
case 0:
sprintf(Info->Encoder, "%u.%u",
Info->EncoderVersion / 100,
Info->EncoderVersion / 10 % 10);
break;
case 2:
case 4:
case 6:
case 8:
sprintf(Info->Encoder, "%u.%02u Beta",
Info->EncoderVersion / 100,
Info->EncoderVersion % 100);
break;
default:
sprintf(Info->Encoder, "%u.%02u Alpha",
Info->EncoderVersion / 100,
Info->EncoderVersion % 100);
break;
}
}
// estimation, exact value needs too much time
Info->Bitrate = (long) (Info->ByteLength) * 8. * Info->SampleFreq / (1152 * Info->Frames - 576);
} else {
// read the file-header (SV6 and below)
Info->Bitrate = ((HeaderData[0] >> 23) & 0x01FF) * 1000; // read the file-header (SV6 and below)
Info->MS = (HeaderData[0] >> 21) & 0x0001;
Info->IS = (HeaderData[0] >> 22) & 0x0001;
Info->StreamVersion = (HeaderData[0] >> 11) & 0x03FF;
Info->MaxBand = (HeaderData[0] >> 6) & 0x001F;
Info->BlockSize = (HeaderData[0]) & 0x003F;
Info->Profile = 0;
//gain
Info->GainTitle = 0; // not supported
Info->PeakTitle = 0;
Info->GainAlbum = 0;
Info->PeakAlbum = 0;
//gaples
Info->LastFrameSamples = 0;
Info->IsTrueGapless = 0;
if (Info->StreamVersion >= 5)
Info->Frames = HeaderData[1]; // 32 bit
else
Info->Frames = (HeaderData[1] >> 16); // 16 bit
Info->EncoderVersion = 0;
Info->Encoder[0] = '\0';
#if 0
if (Info->StreamVersion == 7)
return ERROR_CODE_SV7BETA; // are there any unsupported parameters used?
if (Info->Bitrate != 0)
return ERROR_CODE_CBR;
if (Info->IS != 0)
return ERROR_CODE_IS;
if (Info->BlockSize != 1)
return ERROR_CODE_BLOCKSIZE;
#endif
if (Info->StreamVersion < 6) // Bugfix: last frame was invalid for up to SV5
Info->Frames -= 1;
Info->SampleFreq = 44100; // AB: used by all files up to SV7
Info->Channels = 2;
}
Info->ProfileName=profile_stringify(Info->Profile);
Info->Duration = (int) (Info->Frames * 1152 / (Info->SampleFreq/1000.0));
return 0;
}
|
