OXYGENHUB
◆ main openmsx / src / sound / ResampledSoundDevice.cc
2.2 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
#include "ResampledSoundDevice.hh"
2
3 
#include "ResampleBlip.hh"
4 
#include "ResampleHQ.hh"
5 
#include "ResampleTrivial.hh"
6
7 
#include "EnumSetting.hh"
8 
#include "GlobalSettings.hh"
9 
#include "MSXMotherBoard.hh"
10 
#include "Reactor.hh"
11
12 
#include "unreachable.hh"
13
14 
#include <cassert>
15 
#include <memory>
16
17 
namespace openmsx {
18
19 
ResampledSoundDevice::ResampledSoundDevice(
20 
		MSXMotherBoard& motherBoard, std::string_view name_,
21 
		static_string_view description_, unsigned channels,
22 
		unsigned inputSampleRate_, bool stereo_)
23 
	: SoundDevice(motherBoard.getMSXMixer(), name_, description_,
24 
	              channels, inputSampleRate_, stereo_)
25 
	, resampleSetting(motherBoard.getReactor().getGlobalSettings().getResampleSetting())
26 
{
27 
	resampleSetting.attach(*this);
28 
}
29
30 
ResampledSoundDevice::~ResampledSoundDevice()
31 
{
32 
	resampleSetting.detach(*this);
33 
}
34
35 
void ResampledSoundDevice::setOutputRate(unsigned /*hostSampleRate*/, double /*speed*/)
36 
{
37 
	createResampler();
38 
}
39
40 
bool ResampledSoundDevice::updateBuffer(size_t length, float* buffer,
41 
                                        EmuTime time)
42 
{
43 
	return algo->generateOutput(buffer, length, time);
44 
}
45
46 
bool ResampledSoundDevice::generateInput(float* buffer, size_t num)
47 
{
48 
	return mixChannels(buffer, num);
49 
}
50
51 
void ResampledSoundDevice::update(const Setting& setting) noexcept
52 
{
53 
	(void)setting;
54 
	assert(&setting == &resampleSetting);
55 
	createResampler();
56 
}
57
58 
void ResampledSoundDevice::createResampler()
59 
{
60 
	const DynamicClock& hostClock = getHostSampleClock();
61 
	EmuDuration outputPeriod = hostClock.getPeriod();
62 
	EmuDuration inputPeriod = EmuDuration::sec(getEffectiveSpeed() / double(getInputRate()));
63 
	emuClock.reset(hostClock.getTime());
64 
	emuClock.setPeriod(inputPeriod);
65
66 
	if (outputPeriod == inputPeriod) {
67 
		algo = std::make_unique<ResampleTrivial>(*this);
68 
	} else {
69 
		switch (resampleSetting.getEnum()) {
70 
		case ResampleType::HQ:
71 
			if (!isStereo()) {
72 
				algo = std::make_unique<ResampleHQ<1>>(*this, hostClock);
73 
			} else {
74 
				algo = std::make_unique<ResampleHQ<2>>(*this, hostClock);
75 
			}
76 
			break;
77 
		case ResampleType::BLIP:
78 
			if (!isStereo()) {
79 
				algo = std::make_unique<ResampleBlip<1>>(*this, hostClock);
80 
			} else {
81 
				algo = std::make_unique<ResampleBlip<2>>(*this, hostClock);
82 
			}
83 
			break;
84 
		default:
85 
			UNREACHABLE;
86 
		}
87 
	}
88 
}
89
90 
} // namespace openmsx