-
Notifications
You must be signed in to change notification settings - Fork 40
/
util.h
249 lines (220 loc) · 6.45 KB
/
util.h
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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
#ifndef _UTIL_H
#define _UTIL_H
#include <cstdlib>
#include <cstring>
#include <cwchar>
#include <string>
#include <sstream>
#include <algorithm>
#include <iterator>
#include <stdexcept>
#include <cerrno>
#include <stdint.h>
#include <sys/stat.h>
#include <io.h>
#include "strutil.h"
#if defined(_MSC_VER) && _MSC_VER < 1800
#ifdef _M_IX86
inline int lrint(double x)
{
int n;
_asm {
fld x
fistp n
}
return n;
}
#else
#include <emmintrin.h>
inline int lrint(double x)
{
return _mm_cvtsd_si32(_mm_load_sd(&x));
}
#endif
#endif
#if !defined(_MSC_VER) && !defined(__MINGW32__)
inline int _wtoi(const wchar_t *s) { return std::wcstol(s, 0, 10); }
#endif
#ifdef _MSC_VER
#define fseeko _fseeki64
#define ftello _ftelli64
#endif
namespace util {
template <typename T, size_t size>
inline size_t sizeof_array(const T (&)[size]) { return size; }
template <typename T> class FIFO {
std::vector<T> m_data;
size_t m_unit, m_begin, m_end;
public:
FIFO(): m_data(256), m_unit(1), m_begin(0), m_end(0) {}
void set_unit(size_t n) { m_unit = n; }
void reset() { m_begin = m_end = 0; }
size_t count() { return (m_end - m_begin) / m_unit; }
T *read_ptr() { return &m_data[m_begin]; }
void advance(size_t n) { m_begin += n * m_unit; }
T *read(size_t n)
{
T *begin = read_ptr();
advance(n);
return begin;
}
T *write_ptr() { return &m_data[m_end]; }
void commit(size_t n) { m_end += n * m_unit; }
void reserve(size_t n)
{
if (m_begin == m_end)
reset();
if (m_begin > 0) {
std::memmove(&m_data[0], read_ptr(),
sizeof(T) * (m_end - m_begin));
m_end -= m_begin;
m_begin = 0;
}
if (m_end + n * m_unit > m_data.size()) {
m_data.resize(m_end + n * m_unit);
}
}
};
struct fourcc {
uint32_t nvalue;
char svalue[5];
explicit fourcc(uint32_t v) : nvalue(v)
{
for (int i = 3; i >= 0; --i, v >>= 8)
svalue[i] = v & 0xff;
svalue[4] = 0;
}
explicit fourcc(const char *s) : nvalue(0)
{
std::memcpy(svalue, s, 4);
svalue[4] = 0;
const unsigned char *p = reinterpret_cast<const unsigned char *>(s);
nvalue = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
}
operator const char *() const { return svalue; }
operator uint32_t() const { return nvalue; }
};
inline void *xcalloc(size_t count, size_t size)
{
void *memory = std::calloc(count, size);
if (!memory) throw std::bad_alloc();
return memory;
}
template <typename ForwardIterator>
bool is_increasing(ForwardIterator begin, ForwardIterator end)
{
if (begin == end)
return true;
for (ForwardIterator it; it = begin, ++begin != end; )
if (*it >= *begin)
return false;
return true;
}
template <typename T>
class AutoDynaCast {
T *m_pointer;
public:
AutoDynaCast(T *p): m_pointer(p) {}
template <typename U>
operator U*() { return dynamic_cast<U*>(m_pointer); }
};
inline void check_eof(bool expr)
{
if (!expr) throw std::runtime_error("Premature EOF");
}
inline
uint32_t bitcount(uint32_t bits)
{
bits = (bits & 0x55555555) + (bits >> 1 & 0x55555555);
bits = (bits & 0x33333333) + (bits >> 2 & 0x33333333);
bits = (bits & 0x0f0f0f0f) + (bits >> 4 & 0x0f0f0f0f);
bits = (bits & 0x00ff00ff) + (bits >> 8 & 0x00ff00ff);
return (bits & 0x0000ffff) + (bits >>16 & 0x0000ffff);
}
inline uint16_t l2host16(uint16_t n) { return n; }
inline uint32_t l2host32(uint32_t n) { return n; }
inline uint64_t l2host64(uint64_t n) { return n; }
inline uint16_t b2host16(uint16_t n)
{
return _byteswap_ushort(n);
}
inline uint32_t b2host32(uint32_t n)
{
return _byteswap_ulong(n);
}
inline uint64_t b2host64(uint64_t n)
{
return _byteswap_uint64(n);
}
inline uint32_t h2big32(uint32_t n)
{
return _byteswap_ulong(n);
}
void bswapbuffer(void *buffer, size_t size, uint32_t width);
inline void throw_crt_error(const std::string &message)
{
std::stringstream ss;
ss << message << ": " << std::strerror(errno);
throw std::runtime_error(ss.str());
}
inline void throw_crt_error(const std::wstring &message)
{
std::stringstream ss;
ss << strutil::w2us(message) << ": " << std::strerror(errno);
throw std::runtime_error(ss.str());
}
class FilePositionSaver
{
private:
int m_fd;
int64_t m_saved_position;
public:
explicit FilePositionSaver(int fd): m_fd(fd)
{
m_saved_position = _lseeki64(m_fd, 0, SEEK_CUR);
}
~FilePositionSaver()
{
_lseeki64(m_fd, m_saved_position, SEEK_SET);
}
};
void pack(void *data, size_t *size, unsigned width, unsigned new_width);
void unpack(const void *input, void *output, size_t *size, unsigned width,
unsigned new_width);
void convert_sign(uint32_t *data, size_t size);
ssize_t nread(int fd, void *buffer, size_t size);
inline double dB_to_scale(double dB)
{
return std::pow(10, 0.05 * dB);
}
inline double scale_to_dB(double scale)
{
return 20 * std::log10(scale);
}
bool parse_timespec(const wchar_t *spec, double sample_rate,
int64_t *result);
inline void seconds_to_HMS(double seconds, int *h, int *m, int *s,
int *millis)
{
*h = seconds / 3600;
seconds -= *h * 3600;
*m = seconds / 60;
seconds -= *m * 60;
*s = seconds;
*millis = (seconds - *s) * 1000;
}
inline std::wstring format_seconds(double seconds)
{
int h, m, s, millis;
seconds_to_HMS(seconds, &h, &m, &s, &millis);
return h ? strutil::format(L"%d:%02d:%02d.%03d", h, m, s, millis)
: strutil::format(L"%d:%02d.%03d", m, s, millis);
}
}
#define CHECKCRT(expr) \
do { \
if (expr) { \
util::throw_crt_error(#expr); \
} \
} while (0)
#endif