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
|
/*
* This file is part of AtracDEnc.
*
* AtracDEnc 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.
*
* AtracDEnc 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 AtracDEnc; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "aea.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
using std::string;
using std::array;
using std::vector;
using std::unique_ptr;
TAea::TMeta TAea::ReadMeta(const string& filename) {
FILE* fp = fopen(filename.c_str(), "rb");
if (!fp)
throw TAeaIOError("Can't open file to read", errno);
array<char, AeaMetaSize> buf;
if (fread(&buf[0], TAea::AeaMetaSize, 1, fp) != 1) {
const int errnum = errno;
fclose(fp);
throw TAeaIOError("Can't read AEA header", errnum);
}
if ( buf[0] == 0x00 && buf[1] == 0x08 && buf[2] == 0x00 && buf[3] == 0x00 && buf[264] < 3 ) {
return {fp, buf};
}
throw TAeaFormatError();
}
TAea::TMeta TAea::CreateMeta(const string& filename, const string& title, uint8_t channelNum, uint32_t numFrames) {
FILE* fp = fopen(filename.c_str(), "wb");
if (!fp)
throw TAeaIOError("Can't open file to write", errno);
array<char, AeaMetaSize> buf;
memset(&buf[0], 0, AeaMetaSize);
buf[0] = 0x00;
buf[1] = 0x08;
buf[2] = 0x00;
buf[3] = 0x00;
strncpy(&buf[4], title.c_str(), 16);
buf[19] = 0;
// buf[210] = 0x08;
*(uint32_t*)&buf[260] = numFrames;
buf[264] = (char)channelNum;
if (fwrite(&buf[0], TAea::AeaMetaSize, 1, fp) != 1) {
const int errnum = errno;
fclose(fp);
throw TAeaIOError("Can't read AEA header", errnum);
}
static char dummy[212];
if (fwrite(&dummy[0], 212, 1, fp) != 1) {
const int errnum = errno;
fclose(fp);
throw TAeaIOError("Can't read AEA header", errnum);
}
return {fp, buf};
}
TAea::TAea(const string& filename)
: Meta(ReadMeta(filename))
{}
TAea::TAea(const string& filename, const string& title, uint8_t channelNum, uint32_t numFrames)
: Meta(CreateMeta(filename, title, channelNum, numFrames))
{}
TAea::~TAea() {
fclose(Meta.AeaFile);
}
string TAea::GetName() const {
return string(&Meta.AeaHeader[4]);
}
unique_ptr<TAea::TFrame> TAea::ReadFrame() {
unique_ptr<TAea::TFrame>frame(new TFrame(212));
if(fread(frame->Get(), frame->Size(), 1, Meta.AeaFile) != 1) {
const int errnum = errno;
fclose(Meta.AeaFile);
throw TAeaIOError("Can't read AEA frame", errnum);
}
return frame;
}
/*
void TAea::WriteFrame(std::unique_ptr<TAea::TFrame>&& frame) {
if (fwrite(frame.get(), frame->size(), 1, Meta.AeaFile) != 1) {
const int errnum = errno;
fclose(Meta.AeaFile);
throw TAeaIOError("Can't write AEA frame", errnum);
}
}
*/
void TAea::WriteFrame(vector<char> data) {
if (FirstWrite) {
FirstWrite = false;
return;
}
data.resize(212);
if (fwrite(data.data(), data.size(), 1, Meta.AeaFile) != 1) {
const int errnum = errno;
fclose(Meta.AeaFile);
throw TAeaIOError("Can't write AEA frame", errnum);
}
}
uint8_t TAea::GetChannelNum() const {
return Meta.AeaHeader[264];
}
uint64_t TAea::GetLengthInSamples() const {
#ifdef PLATFORM_WINDOWS
const int fd = _fileno(Meta.AeaFile);
#else
const int fd = fileno(Meta.AeaFile);
#endif
struct stat sb;
fstat(fd, &sb);
const uint32_t nChannels = Meta.AeaHeader[264] ? Meta.AeaHeader[264] : 1;
return (uint64_t)512 * ((sb.st_size - TAea::AeaMetaSize) / 212 / nChannels - 5);
}
|
