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Better audio playback code

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wheremyfoodat 2024-11-22 02:33:57 +02:00
parent 1baf8a13ed
commit 83aafa31f0
3 changed files with 32 additions and 12 deletions
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3
include/audio/dsp_core.hpp
View file

@ -24,7 +24,8 @@ namespace Audio {
static constexpr u64 lleSlice = 16384;
class DSPCore {
using Samples = Common::RingBuffer<s16, 1024>;
// 0x2000 stereo (= 2 channel) samples
using Samples = Common::RingBuffer<s16, 0x2000 * 2>;
protected:
Memory& mem;

5
include/audio/miniaudio_device.hpp
View file

@ -3,11 +3,12 @@
#include <string>
#include <vector>
#include "helpers.hpp"
#include "miniaudio.h"
#include "ring_buffer.hpp"
class MiniAudioDevice {
using Samples = Common::RingBuffer<ma_int16, 1024>;
using Samples = Common::RingBuffer<ma_int16, 0x2000 * 2>;
static constexpr ma_uint32 sampleRate = 32768; // 3DS sample rate
static constexpr ma_uint32 channelCount = 2; // Audio output is stereo
@ -20,6 +21,8 @@ class MiniAudioDevice {
bool initialized = false;
bool running = false;
// Store the last stereo sample we output. We play this when underruning to avoid pops.
std::array<s16, 2> lastStereoSample;
std::vector<std::string> audioDevices;
public:

36
src/core/audio/miniaudio_device.cpp
View file

@ -1,5 +1,7 @@
#include "audio/miniaudio_device.hpp"
#include <cstring>
#include "helpers.hpp"
MiniAudioDevice::MiniAudioDevice() : initialized(false), running(false), samples(nullptr) {}
@ -87,20 +89,34 @@ void MiniAudioDevice::init(Samples& samples, bool safe) {
deviceConfig.aaudio.usage = ma_aaudio_usage_game;
deviceConfig.wasapi.noAutoConvertSRC = true;
lastStereoSample = {0, 0};
deviceConfig.dataCallback = [](ma_device* device, void* out, const void* input, ma_uint32 frameCount) {
auto self = reinterpret_cast<MiniAudioDevice*>(device->pUserData);
s16* output = reinterpret_cast<ma_int16*>(out);
const usize maxSamples = std::min(self->samples->Capacity(), usize(frameCount * channelCount));
// Wait until there's enough samples to pop
while (self->samples->size() < maxSamples) {
// If audio output is disabled from the emulator thread, make sure that this callback will return and not hang
if (!self->running) {
return;
}
if (!self->running) {
return;
}
self->samples->pop(output, maxSamples);
s16* output = reinterpret_cast<ma_int16*>(out);
usize samplesWritten = 0;
samplesWritten += self->samples->pop(output, frameCount * channelCount);
// Get the last sample for underrun handling
if (samplesWritten != 0) {
std::memcpy(&self->lastStereoSample[0], &output[(samplesWritten - 1) * 2], sizeof(lastStereoSample));
}
// If underruning, copy the last output sample
{
s16* pointer = &output[samplesWritten * 2];
s16 l = self->lastStereoSample[0];
s16 r = self->lastStereoSample[1];
for (usize i = samplesWritten; i < frameCount; i++) {
*pointer++ = l;
*pointer++ = r;
}
}
};
if (ma_device_init(&context, &deviceConfig, &device) != MA_SUCCESS) {