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
|
#include "chresampler.h"
#include "cpp11fix.h"
#include <config.h>
#include <hugin.hpp>
#include <stdio.h>
#ifdef WITH_RESAMPLER
#if defined(USE_ZITA)
#include <zita-resampler/resampler.h>
#elif defined(USE_SRC)
#include <samplerate.h>
#else
#error "No resampler selected"
#endif
class CHResampler::Prv
{
public:
#if defined(USE_ZITA)
Resampler zita;
#elif defined(USE_SRC)
SRC_STATE* state;
SRC_DATA data;
#endif
};
CHResampler::CHResampler()
: prv{std::make_unique<Prv>()}
{
#if defined(SRC)
prv->state = nullptr;
#endif
}
void CHResampler::setup(double input_fs, double output_fs)
{
if((input_fs == 0.0) || (output_fs == 0.0))
{
return;
}
int nchan = 1;
this->input_fs = input_fs;
this->output_fs = output_fs;
#if defined(USE_ZITA)
DEBUG(resampler, "Using zita-resampler (%d -> %d)", (int)input_fs,
(int)output_fs);
int hlen = 72;
prv->zita.reset();
prv->zita.setup(input_fs, output_fs, nchan, hlen);
std::size_t null_size = prv->zita.inpsize() / 2 - 1;
prv->zita.inp_data = nullptr;
prv->zita.inp_count = null_size;
prv->zita.out_data = nullptr;
prv->zita.out_count = 1024 * 1024;
prv->zita.process();
#elif defined(USE_SRC)
DEBUG(resampler, "Using libsamplerate (%d -> %d)", (int)input_fs,
(int)output_fs);
int err;
prv->state = src_new(SRC_SINC_BEST_QUALITY, nchan, &err);
(void)err;
src_set_ratio(prv->state, output_fs / input_fs);
prv->data.src_ratio = output_fs / input_fs;
prv->data.end_of_input = 0;
#endif
}
CHResampler::~CHResampler()
{
#if defined(USE_ZITA)
#elif defined(USE_SRC)
if(prv->state)
{
src_delete(prv->state);
}
#endif
}
void CHResampler::setInputSamples(float* samples, std::size_t count)
{
#if defined(USE_ZITA)
prv->zita.inp_data = samples;
prv->zita.inp_count = count;
#elif defined(USE_SRC)
prv->data.data_in = samples;
prv->data.input_frames = count;
#endif
}
void CHResampler::setOutputSamples(float* samples, std::size_t count)
{
#if defined(USE_ZITA)
prv->zita.out_data = samples;
prv->zita.out_count = count;
#elif defined(USE_SRC)
prv->data.data_out = samples;
prv->data.output_frames = count;
#endif
}
void CHResampler::process()
{
#if defined(USE_ZITA)
prv->zita.process();
#elif defined(USE_SRC)
src_process(prv->state, &prv->data);
prv->data.output_frames -= prv->data.output_frames_gen;
prv->data.data_out += prv->data.output_frames_gen;
prv->data.input_frames -= prv->data.input_frames_used;
prv->data.data_in += prv->data.input_frames_used;
#endif
}
std::size_t CHResampler::getLatency() const
{
if (input_fs == output_fs)
{
return 0;
}
#if defined(USE_ZITA)
return 0;
#elif defined(USE_SRC)
return 0;
#endif
}
std::size_t CHResampler::getInputSampleCount() const
{
#if defined(USE_ZITA)
return prv->zita.inp_count;
#elif defined(USE_SRC)
return prv->data.input_frames;
#endif
}
std::size_t CHResampler::getOutputSampleCount() const
{
#if defined(USE_ZITA)
return prv->zita.out_count;
#elif defined(USE_SRC)
return prv->data.output_frames;
#endif
}
double CHResampler::getRatio() const
{
return input_fs / output_fs;
}
#else
CHResampler::CHResampler() {}
CHResampler::~CHResampler() {}
void CHResampler::setup(double, double) {}
void CHResampler::setInputSamples(float*, std::size_t) {}
void CHResampler::setOutputSamples(float*, std::size_t) {}
void CHResampler::process() {}
std::size_t CHResampler::getLatency() const
{
return 0;
}
std::size_t CHResampler::getInputSampleCount() const
{
return 0;
}
std::size_t CHResampler::getOutputSampleCount() const
{
return 0;
}
double CHResampler::getRatio() const
{
return 1;
}
#endif
|