mirror of https://github.com/bsnes-emu/bsnes.git
248 lines
9.0 KiB
C++
248 lines
9.0 KiB
C++
#include <avrt.h>
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#include <mmdeviceapi.h>
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#include <audioclient.h>
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#include <audiopolicy.h>
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#include <devicetopology.h>
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#include <endpointvolume.h>
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#include <functiondiscoverykeys_devpkey.h>
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struct AudioWASAPI : Audio {
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AudioWASAPI() { initialize(); }
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~AudioWASAPI() { terminate(); }
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auto driver() -> string override { return "WASAPI"; }
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auto ready() -> bool override { return _ready; }
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auto hasExclusive() -> bool override { return true; }
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auto hasDevice() -> bool override { return true; }
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auto hasBlocking() -> bool override { return true; }
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auto hasFrequency() -> bool override { return true; }
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auto hasLatency() -> bool override { return true; }
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auto availableDevices() -> vector<string> override {
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return _devices;
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}
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auto availableFrequencies() -> vector<double> override {
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return {_frequency};
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}
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auto availableLatencies() -> vector<uint> override {
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return {0, 20, 40, 60, 80, 100};
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}
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auto setExclusive(bool exclusive) -> bool override {
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if(exclusive == Audio::exclusive()) return true;
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if(!Audio::setExclusive(exclusive)) return false;
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return initialize();
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}
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auto setDevice(string device) -> bool override {
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if(device == Audio::device()) return true;
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if(!Audio::setDevice(device)) return false;
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return initialize();
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}
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auto setBlocking(bool blocking) -> bool override {
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if(blocking == Audio::blocking()) return true;
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if(!Audio::setBlocking(blocking)) return false;
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return true;
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}
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auto setFrequency(double frequency) -> bool override {
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if(frequency == Audio::frequency()) return true;
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if(!Audio::setFrequency(frequency)) return false;
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return initialize();
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}
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auto setLatency(uint latency) -> bool override {
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if(latency == Audio::latency()) return true;
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if(!Audio::setLatency(latency)) return false;
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return initialize();
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}
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auto clear() -> void override {
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if(!ready()) return;
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_queue.read = 0;
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_queue.write = 0;
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_queue.count = 0;
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_audioClient->Stop();
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_audioClient->Reset();
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_audioClient->Start();
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}
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auto output(const double samples[]) -> void override {
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if(!ready()) return;
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for(uint n : range(_channels)) {
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_queue.samples[_queue.write][n] = samples[n];
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}
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_queue.write++;
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_queue.count++;
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if(_queue.count >= _bufferSize) {
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if(WaitForSingleObject(_eventHandle, _blocking ? INFINITE : 0) == WAIT_OBJECT_0) {
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write();
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}
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}
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}
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private:
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auto initialize() -> bool {
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terminate();
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if(CoCreateInstance(CLSID_MMDeviceEnumerator, nullptr, CLSCTX_ALL, IID_IMMDeviceEnumerator, (void**)&_enumerator) != S_OK) return false;
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//enumerate all audio endpoint devices, and select the first to match the device() name
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IMMDeviceCollection* deviceCollection = nullptr;
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if(_enumerator->EnumAudioEndpoints(eRender, DEVICE_STATE_ACTIVE, &deviceCollection) != S_OK) return false;
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uint deviceCount = 0;
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if(deviceCollection->GetCount(&deviceCount) != S_OK) return false;
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for(uint deviceIndex : range(deviceCount)) {
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IMMDevice* device = nullptr;
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if(deviceCollection->Item(deviceIndex, &device) != S_OK) return false;
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IPropertyStore* propertyStore = nullptr;
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device->OpenPropertyStore(STGM_READ, &propertyStore);
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PROPVARIANT propVariant;
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propertyStore->GetValue(PKEY_Device_FriendlyName, &propVariant);
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_devices.append((const char*)utf8_t(propVariant.pwszVal));
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propertyStore->Release();
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if(!_audioDevice && _devices.right() == _device) {
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_audioDevice = device;
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} else {
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device->Release();
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}
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}
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deviceCollection->Release();
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//if no match is found, choose the default audio endpoint for the device()
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if(!_audioDevice) {
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if(_enumerator->GetDefaultAudioEndpoint(eRender, eConsole, &_audioDevice) != S_OK) return false;
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}
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if(_audioDevice->Activate(IID_IAudioClient, CLSCTX_ALL, nullptr, (void**)&_audioClient) != S_OK) return false;
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WAVEFORMATEXTENSIBLE waveFormat = {};
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if(_exclusive) {
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IPropertyStore* propertyStore = nullptr;
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if(_audioDevice->OpenPropertyStore(STGM_READ, &propertyStore) != S_OK) return false;
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PROPVARIANT propVariant;
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if(propertyStore->GetValue(PKEY_AudioEngine_DeviceFormat, &propVariant) != S_OK) return false;
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waveFormat = *(WAVEFORMATEXTENSIBLE*)propVariant.blob.pBlobData;
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propertyStore->Release();
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if(_audioClient->GetDevicePeriod(nullptr, &_devicePeriod) != S_OK) return false;
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auto latency = max(_devicePeriod, (REFERENCE_TIME)_latency * 10'000); //1ms to 100ns units
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auto result = _audioClient->Initialize(AUDCLNT_SHAREMODE_EXCLUSIVE, AUDCLNT_STREAMFLAGS_EVENTCALLBACK, latency, latency, &waveFormat.Format, nullptr);
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if(result == AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED) {
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if(_audioClient->GetBufferSize(&_bufferSize) != S_OK) return false;
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_audioClient->Release();
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latency = (REFERENCE_TIME)(10'000 * 1'000 * _bufferSize / waveFormat.Format.nSamplesPerSec);
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if(_audioDevice->Activate(IID_IAudioClient, CLSCTX_ALL, nullptr, (void**)&_audioClient) != S_OK) return false;
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result = _audioClient->Initialize(AUDCLNT_SHAREMODE_EXCLUSIVE, AUDCLNT_STREAMFLAGS_EVENTCALLBACK, latency, latency, &waveFormat.Format, nullptr);
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}
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if(result != S_OK) return false;
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DWORD taskIndex = 0;
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_taskHandle = AvSetMmThreadCharacteristics(L"Pro Audio", &taskIndex);
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} else {
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WAVEFORMATEX* waveFormatEx = nullptr;
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if(_audioClient->GetMixFormat(&waveFormatEx) != S_OK) return false;
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waveFormat = *(WAVEFORMATEXTENSIBLE*)waveFormatEx;
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CoTaskMemFree(waveFormatEx);
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if(_audioClient->GetDevicePeriod(&_devicePeriod, nullptr)) return false;
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auto latency = max(_devicePeriod, (REFERENCE_TIME)_latency * 10'000); //1ms to 100ns units
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if(_audioClient->Initialize(AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_EVENTCALLBACK, latency, 0, &waveFormat.Format, nullptr) != S_OK) return false;
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}
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_eventHandle = CreateEvent(nullptr, false, false, nullptr);
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if(_audioClient->SetEventHandle(_eventHandle) != S_OK) return false;
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if(_audioClient->GetService(IID_IAudioRenderClient, (void**)&_renderClient) != S_OK) return false;
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if(_audioClient->GetBufferSize(&_bufferSize) != S_OK) return false;
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_channels = waveFormat.Format.nChannels;
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_frequency = waveFormat.Format.nSamplesPerSec;
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_mode = waveFormat.SubFormat.Data1;
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_precision = waveFormat.Format.wBitsPerSample;
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_ready = true;
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clear();
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return true;
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}
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auto terminate() -> void {
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_ready = false;
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_devices.reset();
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if(_audioClient) _audioClient->Stop();
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if(_renderClient) _renderClient->Release(), _renderClient = nullptr;
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if(_audioClient) _audioClient->Release(), _audioClient = nullptr;
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if(_audioDevice) _audioDevice->Release(), _audioDevice = nullptr;
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if(_eventHandle) CloseHandle(_eventHandle), _eventHandle = nullptr;
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if(_taskHandle) AvRevertMmThreadCharacteristics(_taskHandle), _taskHandle = nullptr;
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}
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auto write() -> void {
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uint32_t available = _bufferSize;
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if(!_exclusive) {
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uint32_t padding = 0;
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_audioClient->GetCurrentPadding(&padding);
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available = _bufferSize - padding;
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}
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uint32_t length = min(available, _queue.count);
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uint8_t* buffer = nullptr;
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if(_renderClient->GetBuffer(length, &buffer) == S_OK) {
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uint bufferFlags = 0;
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for(uint _ : range(length)) {
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double samples[8] = {};
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if(_queue.count) {
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for(uint n : range(_channels)) {
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samples[n] = _queue.samples[_queue.read][n];
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}
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_queue.read++;
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_queue.count--;
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}
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if(_mode == 1 && _precision == 16) {
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auto output = (uint16_t*)buffer;
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for(uint n : range(_channels)) *output++ = (uint16_t)sclamp<16>(samples[n] * (32768.0 - 1.0));
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buffer = (uint8_t*)output;
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} else if(_mode == 1 && _precision == 32) {
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auto output = (uint32_t*)buffer;
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for(uint n : range(_channels)) *output++ = (uint32_t)sclamp<32>(samples[n] * (65536.0 * 32768.0 - 1.0));
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buffer = (uint8_t*)output;
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} else if(_mode == 3 && _precision == 32) {
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auto output = (float*)buffer;
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for(uint n : range(_channels)) *output++ = float(max(-1.0, min(+1.0, samples[n])));
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buffer = (uint8_t*)output;
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} else {
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//output silence for unsupported sample formats
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bufferFlags = AUDCLNT_BUFFERFLAGS_SILENT;
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break;
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}
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}
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_renderClient->ReleaseBuffer(length, bufferFlags);
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}
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}
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bool _ready = false;
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uint _mode = 0;
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uint _precision = 0;
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struct Queue {
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double samples[65536][8];
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uint16_t read;
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uint16_t write;
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uint16_t count;
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} _queue;
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IMMDeviceEnumerator* _enumerator = nullptr;
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vector<string> _devices;
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IMMDevice* _audioDevice = nullptr;
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IAudioClient* _audioClient = nullptr;
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IAudioRenderClient* _renderClient = nullptr;
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HANDLE _eventHandle = nullptr;
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HANDLE _taskHandle = nullptr;
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REFERENCE_TIME _devicePeriod = 0;
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uint32_t _bufferSize = 0; //in frames
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};
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