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
|
#ifdef SYSTEM_CPP
Audio audio;
void Audio::coprocessor_enable(bool state) {
coprocessor = state;
dspaudio.clear();
dsp_rdoffset = cop_rdoffset = 0;
dsp_wroffset = cop_wroffset = 0;
dsp_length = cop_length = 0;
}
void Audio::coprocessor_frequency(double input_frequency) {
dspaudio.setFrequency(input_frequency);
dspaudio.setResampler(nall::DSP::ResampleEngine::Sinc);
dspaudio.setResamplerFrequency(system.apu_frequency() / 768.0);
}
void Audio::sample(int16 lsample, int16 rsample) {
if(coprocessor == false) return interface->audioSample(lsample, rsample);
dsp_buffer[dsp_wroffset] = ((uint16)lsample << 0) + ((uint16)rsample << 16);
dsp_wroffset = (dsp_wroffset + 1) & buffer_mask;
dsp_length = (dsp_length + 1) & buffer_mask;
flush();
}
void Audio::coprocessor_sample(int16 lsample, int16 rsample) {
signed samples[] = {lsample, rsample};
dspaudio.sample(samples);
while(dspaudio.pending()) {
dspaudio.read(samples);
cop_buffer[cop_wroffset] = ((uint16)samples[0] << 0) + ((uint16)samples[1] << 16);
cop_wroffset = (cop_wroffset + 1) & buffer_mask;
cop_length = (cop_length + 1) & buffer_mask;
flush();
}
}
void Audio::init() {
}
void Audio::flush() {
while(dsp_length > 0 && cop_length > 0) {
uint32 dsp_sample = dsp_buffer[dsp_rdoffset];
uint32 cop_sample = cop_buffer[cop_rdoffset];
dsp_rdoffset = (dsp_rdoffset + 1) & buffer_mask;
cop_rdoffset = (cop_rdoffset + 1) & buffer_mask;
dsp_length--;
cop_length--;
signed dsp_left = (int16)(dsp_sample >> 0);
signed dsp_right = (int16)(dsp_sample >> 16);
signed cop_left = (int16)(cop_sample >> 0);
signed cop_right = (int16)(cop_sample >> 16);
interface->audioSample(
sclamp<16>((dsp_left + cop_left ) / 2),
sclamp<16>((dsp_right + cop_right) / 2)
);
}
}
#endif
|
