/**************************************************************************/
/* audio_driver_wasapi.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifdef WASAPI_ENABLED
#include "audio_driver_wasapi.h"
#include "core/config/project_settings.h"
#include "core/os/os.h"
#include <stdint.h> // INT32_MAX
#include <functiondiscoverykeys.h>
#include <wrl/client.h>
using Microsoft::WRL::ComPtr;
// Define IAudioClient3 if not already defined by MinGW headers
#if defined __MINGW32__ || defined __MINGW64__
#ifndef __IAudioClient3_FWD_DEFINED__
#define __IAudioClient3_FWD_DEFINED__
typedef interface IAudioClient3 IAudioClient3;
#endif // __IAudioClient3_FWD_DEFINED__
#ifndef __IAudioClient3_INTERFACE_DEFINED__
#define __IAudioClient3_INTERFACE_DEFINED__
MIDL_INTERFACE("7ED4EE07-8E67-4CD4-8C1A-2B7A5987AD42")
IAudioClient3 : public IAudioClient2 {
public:
virtual HRESULT STDMETHODCALLTYPE GetSharedModeEnginePeriod(
/* [annotation][in] */
_In_ const WAVEFORMATEX *pFormat,
/* [annotation][out] */
_Out_ UINT32 *pDefaultPeriodInFrames,
/* [annotation][out] */
_Out_ UINT32 *pFundamentalPeriodInFrames,
/* [annotation][out] */
_Out_ UINT32 *pMinPeriodInFrames,
/* [annotation][out] */
_Out_ UINT32 *pMaxPeriodInFrames) = 0;
virtual HRESULT STDMETHODCALLTYPE GetCurrentSharedModeEnginePeriod(
/* [unique][annotation][out] */
_Out_ WAVEFORMATEX * *ppFormat,
/* [annotation][out] */
_Out_ UINT32 * pCurrentPeriodInFrames) = 0;
virtual HRESULT STDMETHODCALLTYPE InitializeSharedAudioStream(
/* [annotation][in] */
_In_ DWORD StreamFlags,
/* [annotation][in] */
_In_ UINT32 PeriodInFrames,
/* [annotation][in] */
_In_ const WAVEFORMATEX *pFormat,
/* [annotation][in] */
_In_opt_ LPCGUID AudioSessionGuid) = 0;
}
__CRT_UUID_DECL(IAudioClient3, 0x7ED4EE07, 0x8E67, 0x4CD4, 0x8C, 0x1A, 0x2B, 0x7A, 0x59, 0x87, 0xAD, 0x42)
#endif // __IAudioClient3_INTERFACE_DEFINED__
#endif // __MINGW32__ || __MINGW64__
#ifndef PKEY_Device_FriendlyNameGodot
#undef DEFINE_PROPERTYKEY
/* clang-format off */
#define DEFINE_PROPERTYKEY(id, a, b, c, d, e, f, g, h, i, j, k, l) \
const PROPERTYKEY id = { { a, b, c, { d, e, f, g, h, i, j, k, } }, l };
/* clang-format on */
DEFINE_PROPERTYKEY(PKEY_Device_FriendlyNameGodot, 0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, 14);
#endif
const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator);
const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator);
const IID IID_IAudioClient = __uuidof(IAudioClient);
const IID IID_IAudioClient3 = __uuidof(IAudioClient3);
const IID IID_IAudioRenderClient = __uuidof(IAudioRenderClient);
const IID IID_IAudioCaptureClient = __uuidof(IAudioCaptureClient);
#define SAFE_RELEASE(memory) \
if ((memory) != nullptr) { \
(memory)->Release(); \
(memory) = nullptr; \
}
#define REFTIMES_PER_SEC 10000000
#define REFTIMES_PER_MILLISEC 10000
#define CAPTURE_BUFFER_CHANNELS 2
static bool default_output_device_changed = false;
static bool default_input_device_changed = false;
// Silence warning due to a COM API weirdness (GH-35194).
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
#endif
class CMMNotificationClient : public IMMNotificationClient {
LONG _cRef = 1;
public:
CMMNotificationClient() {}
virtual ~CMMNotificationClient() {}
ULONG STDMETHODCALLTYPE AddRef() {
return InterlockedIncrement(&_cRef);
}
ULONG STDMETHODCALLTYPE Release() {
ULONG ulRef = InterlockedDecrement(&_cRef);
if (0 == ulRef) {
delete this;
}
return ulRef;
}
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, VOID **ppvInterface) {
if (IID_IUnknown == riid) {
AddRef();
*ppvInterface = (IUnknown *)this;
} else if (__uuidof(IMMNotificationClient) == riid) {
AddRef();
*ppvInterface = (IMMNotificationClient *)this;
} else {
*ppvInterface = nullptr;
return E_NOINTERFACE;
}
return S_OK;
}
HRESULT STDMETHODCALLTYPE OnDeviceAdded(LPCWSTR pwstrDeviceId) {
return S_OK;
}
HRESULT STDMETHODCALLTYPE OnDeviceRemoved(LPCWSTR pwstrDeviceId) {
return S_OK;
}
HRESULT STDMETHODCALLTYPE OnDeviceStateChanged(LPCWSTR pwstrDeviceId, DWORD dwNewState) {
return S_OK;
}
HRESULT STDMETHODCALLTYPE OnDefaultDeviceChanged(EDataFlow flow, ERole role, LPCWSTR pwstrDeviceId) {
if (role == eConsole) {
if (flow == eRender) {
default_output_device_changed = true;
} else if (flow == eCapture) {
default_input_device_changed = true;
}
}
return S_OK;
}
HRESULT STDMETHODCALLTYPE OnPropertyValueChanged(LPCWSTR pwstrDeviceId, const PROPERTYKEY key) {
return S_OK;
}
};
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic pop
#endif
static CMMNotificationClient notif_client;
Error AudioDriverWASAPI::audio_device_init(AudioDeviceWASAPI *p_device, bool p_input, bool p_reinit, bool p_no_audio_client_3) {
WAVEFORMATEX *pwfex;
ComPtr<IMMDeviceEnumerator> enumerator = nullptr;
ComPtr<IMMDevice> output_device = nullptr;
HRESULT hr = CoCreateInstance(CLSID_MMDeviceEnumerator, nullptr, CLSCTX_ALL, IID_IMMDeviceEnumerator, (void **)&enumerator);
ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
if (p_device->device_name == "Default") {
hr = enumerator->GetDefaultAudioEndpoint(p_input ? eCapture : eRender, eConsole, &output_device);
} else {
ComPtr<IMMDeviceCollection> devices = nullptr;
hr = enumerator->EnumAudioEndpoints(p_input ? eCapture : eRender, DEVICE_STATE_ACTIVE, &devices);
ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
LPWSTR strId = nullptr;
bool found = false;
UINT count = 0;
hr = devices->GetCount(&count);
ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
for (ULONG i = 0; i < count && !found; i++) {
ComPtr<IMMDevice> tmp_device = nullptr;
hr = devices->Item(i, &tmp_device);
ERR_BREAK(hr != S_OK);
ComPtr<IPropertyStore> props = nullptr;
hr = tmp_device->OpenPropertyStore(STGM_READ, &props);
ERR_BREAK(hr != S_OK);
PROPVARIANT propvar;
PropVariantInit(&propvar);
hr = props->GetValue(PKEY_Device_FriendlyNameGodot, &propvar);
ERR_BREAK(hr != S_OK);
if (p_device->device_name == String(propvar.pwszVal)) {
hr = tmp_device->GetId(&strId);
ERR_BREAK(hr != S_OK);
found = true;
}
PropVariantClear(&propvar);
}
if (found) {
hr = enumerator->GetDevice(strId, &output_device);
}
if (strId) {
CoTaskMemFree(strId);
}
if (output_device == nullptr) {
hr = enumerator->GetDefaultAudioEndpoint(p_input ? eCapture : eRender, eConsole, &output_device);
}
}
if (p_reinit) {
// In case we're trying to re-initialize the device, prevent throwing this error on the console,
// otherwise if there is currently no device available this will spam the console.
if (hr != S_OK) {
return ERR_CANT_OPEN;
}
} else {
ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
}
hr = enumerator->RegisterEndpointNotificationCallback(¬if_client);
if (hr != S_OK) {
ERR_PRINT("WASAPI: RegisterEndpointNotificationCallback error");
}
using_audio_client_3 = !p_input; // IID_IAudioClient3 is only used for adjustable output latency (not input)
if (p_no_audio_client_3) {
using_audio_client_3 = false;
}
if (using_audio_client_3) {
hr = output_device->Activate(IID_IAudioClient3, CLSCTX_ALL, nullptr, (void **)&p_device->audio_client);
if (hr != S_OK) {
// IID_IAudioClient3 will never activate on OS versions before Windows 10.
// Older Windows versions should fall back gracefully.
using_audio_client_3 = false;
print_verbose("WASAPI: Couldn't activate output_device with IAudioClient3 interface, falling back to IAudioClient interface");
} else {
print_verbose("WASAPI: Activated output_device using IAudioClient3 interface");
}
}
if (!using_audio_client_3) {
hr = output_device->Activate(IID_IAudioClient, CLSCTX_ALL, nullptr, (void **)&p_device->audio_client);
}
if (p_reinit) {
if (hr != S_OK) {
return ERR_CANT_OPEN;
}
} else {
ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
}
if (using_audio_client_3) {
AudioClientProperties audioProps{};
audioProps.cbSize = sizeof(AudioClientProperties);
audioProps.bIsOffload = FALSE;
audioProps.eCategory = AudioCategory_GameEffects;
hr = ((IAudioClient3 *)p_device->audio_client)->SetClientProperties(&audioProps);
ERR_FAIL_COND_V_MSG(hr != S_OK, ERR_CANT_OPEN, "WASAPI: SetClientProperties failed with error 0x" + String::num_uint64(hr, 16) + ".");
}
hr = p_device->audio_client->GetMixFormat(&pwfex);
ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
print_verbose("WASAPI: wFormatTag = " + itos(pwfex->wFormatTag));
print_verbose("WASAPI: nChannels = " + itos(pwfex->nChannels));
print_verbose("WASAPI: nSamplesPerSec = " + itos(pwfex->nSamplesPerSec));
print_verbose("WASAPI: nAvgBytesPerSec = " + itos(pwfex->nAvgBytesPerSec));
print_verbose("WASAPI: nBlockAlign = " + itos(pwfex->nBlockAlign));
print_verbose("WASAPI: wBitsPerSample = " + itos(pwfex->wBitsPerSample));
print_verbose("WASAPI: cbSize = " + itos(pwfex->cbSize));
WAVEFORMATEX *closest = nullptr;
hr = p_device->audio_client->IsFormatSupported(AUDCLNT_SHAREMODE_SHARED, pwfex, &closest);
if (hr == S_FALSE) {
WARN_PRINT("WASAPI: Mix format is not supported by the output_device");
if (closest) {
print_verbose("WASAPI: closest->wFormatTag = " + itos(closest->wFormatTag));
print_verbose("WASAPI: closest->nChannels = " + itos(closest->nChannels));
print_verbose("WASAPI: closest->nSamplesPerSec = " + itos(closest->nSamplesPerSec));
print_verbose("WASAPI: closest->nAvgBytesPerSec = " + itos(closest->nAvgBytesPerSec));
print_verbose("WASAPI: closest->nBlockAlign = " + itos(closest->nBlockAlign));
print_verbose("WASAPI: closest->wBitsPerSample = " + itos(closest->wBitsPerSample));
print_verbose("WASAPI: closest->cbSize = " + itos(closest->cbSize));
WARN_PRINT("WASAPI: Using closest match instead");
pwfex = closest;
}
}
// Since we're using WASAPI Shared Mode we can't control any of these, we just tag along
p_device->channels = pwfex->nChannels;
p_device->format_tag = pwfex->wFormatTag;
p_device->bits_per_sample = pwfex->wBitsPerSample;
p_device->frame_size = (p_device->bits_per_sample / 8) * p_device->channels;
if (p_device->format_tag == WAVE_FORMAT_EXTENSIBLE) {
WAVEFORMATEXTENSIBLE *wfex = (WAVEFORMATEXTENSIBLE *)pwfex;
if (wfex->SubFormat == KSDATAFORMAT_SUBTYPE_PCM) {
p_device->format_tag = WAVE_FORMAT_PCM;
} else if (wfex->SubFormat == KSDATAFORMAT_SUBTYPE_IEEE_FLOAT) {
p_device->format_tag = WAVE_FORMAT_IEEE_FLOAT;
} else {
ERR_PRINT("WASAPI: Format not supported");
ERR_FAIL_V(ERR_CANT_OPEN);
}
} else {
if (p_device->format_tag != WAVE_FORMAT_PCM && p_device->format_tag != WAVE_FORMAT_IEEE_FLOAT) {
ERR_PRINT("WASAPI: Format not supported");
ERR_FAIL_V(ERR_CANT_OPEN);
}
}
if (!using_audio_client_3) {
DWORD streamflags = 0;
if ((DWORD)mix_rate != pwfex->nSamplesPerSec) {
streamflags |= AUDCLNT_STREAMFLAGS_RATEADJUST;
pwfex->nSamplesPerSec = mix_rate;
pwfex->nAvgBytesPerSec = pwfex->nSamplesPerSec * pwfex->nChannels * (pwfex->wBitsPerSample / 8);
}
hr = p_device->audio_client->Initialize(AUDCLNT_SHAREMODE_SHARED, streamflags, p_input ? REFTIMES_PER_SEC : 0, 0, pwfex, nullptr);
ERR_FAIL_COND_V_MSG(hr != S_OK, ERR_CANT_OPEN, "WASAPI: Initialize failed with error 0x" + String::num_uint64(hr, 16) + ".");
UINT32 max_frames;
hr = p_device->audio_client->GetBufferSize(&max_frames);
ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
// Due to WASAPI Shared Mode we have no control of the buffer size
if (!p_input) {
buffer_frames = max_frames;
int64_t latency = 0;
audio_output.audio_client->GetStreamLatency(&latency);
// WASAPI REFERENCE_TIME units are 100 nanoseconds per unit
// https://docs.microsoft.com/en-us/windows/win32/directshow/reference-time
// Convert REFTIME to seconds as godot uses for latency
real_latency = (float)latency / (float)REFTIMES_PER_SEC;
}
} else {
IAudioClient3 *device_audio_client_3 = (IAudioClient3 *)p_device->audio_client;
// AUDCLNT_STREAMFLAGS_RATEADJUST is an invalid flag with IAudioClient3, therefore we have to use
// the closest supported mix rate supported by the audio driver.
mix_rate = pwfex->nSamplesPerSec;
print_verbose("WASAPI: mix_rate = " + itos(mix_rate));
UINT32 default_period_frames, fundamental_period_frames, min_period_frames, max_period_frames;
hr = device_audio_client_3->GetSharedModeEnginePeriod(
pwfex,
&default_period_frames,
&fundamental_period_frames,
&min_period_frames,
&max_period_frames);
if (hr != S_OK) {
print_verbose("WASAPI: GetSharedModeEnginePeriod failed with error 0x" + String::num_uint64(hr, 16) + ", falling back to IAudioClient.");
CoTaskMemFree(pwfex);
return audio_device_init(p_device, p_input, p_reinit, true);
}
// Period frames must be an integral multiple of fundamental_period_frames or IAudioClient3 initialization will fail,
// so we need to select the closest multiple to the user-specified latency.
UINT32 desired_period_frames = target_latency_ms * mix_rate / 1000;
UINT32 period_frames = (desired_period_frames / fundamental_period_frames) * fundamental_period_frames;
if (ABS((int64_t)period_frames - (int64_t)desired_period_frames) > ABS((int64_t)(period_frames + fundamental_period_frames) - (int64_t)desired_period_frames)) {
period_frames = period_frames + fundamental_period_frames;
}
period_frames = CLAMP(period_frames, min_period_frames, max_period_frames);
print_verbose("WASAPI: fundamental_period_frames = " + itos(fundamental_period_frames));
print_verbose("WASAPI: min_period_frames = " + itos(min_period_frames));
print_verbose("WASAPI: max_period_frames = " + itos(max_period_frames));
print_verbose("WASAPI: selected a period frame size of " + itos(period_frames));
buffer_frames = period_frames;
hr = device_audio_client_3->InitializeSharedAudioStream(0, period_frames, pwfex, nullptr);
if (hr != S_OK) {
print_verbose("WASAPI: InitializeSharedAudioStream failed with error 0x" + String::num_uint64(hr, 16) + ", falling back to IAudioClient.");
CoTaskMemFree(pwfex);
return audio_device_init(p_device, p_input, p_reinit, true);
} else {
uint32_t output_latency_in_frames;
WAVEFORMATEX *current_pwfex;
hr = device_audio_client_3->GetCurrentSharedModeEnginePeriod(¤t_pwfex, &output_latency_in_frames);
if (hr == OK) {
real_latency = (float)output_latency_in_frames / (float)current_pwfex->nSamplesPerSec;
CoTaskMemFree(current_pwfex);
} else {
print_verbose("WASAPI: GetCurrentSharedModeEnginePeriod failed with error 0x" + String::num_uint64(hr, 16) + ", falling back to IAudioClient.");
CoTaskMemFree(pwfex);
return audio_device_init(p_device, p_input, p_reinit, true);
}
}
}
if (p_input) {
hr = p_device->audio_client->GetService(IID_IAudioCaptureClient, (void **)&p_device->capture_client);
} else {
hr = p_device->audio_client->GetService(IID_IAudioRenderClient, (void **)&p_device->render_client);
}
ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
// Free memory
CoTaskMemFree(pwfex);
return OK;
}
Error AudioDriverWASAPI::init_output_device(bool p_reinit) {
Error err = audio_device_init(&audio_output, false, p_reinit);
if (err != OK) {
return err;
}
switch (audio_output.channels) {
case 1: // Mono
case 3: // Surround 2.1
case 5: // Surround 5.0
case 7: // Surround 7.0
// We will downmix as required.
channels = audio_output.channels + 1;
break;
case 2: // Stereo
case 4: // Surround 3.1
case 6: // Surround 5.1
case 8: // Surround 7.1
channels = audio_output.channels;
break;
default:
WARN_PRINT("WASAPI: Unsupported number of channels: " + itos(audio_output.channels));
channels = 2;
break;
}
// Sample rate is independent of channels (ref: https://stackoverflow.com/questions/11048825/audio-sample-frequency-rely-on-channels)
samples_in.resize(buffer_frames * channels);
input_position = 0;
input_size = 0;
print_verbose("WASAPI: detected " + itos(audio_output.channels) + " channels");
print_verbose("WASAPI: audio buffer frames: " + itos(buffer_frames) + " calculated latency: " + itos(buffer_frames * 1000 / mix_rate) + "ms");
return OK;
}
Error AudioDriverWASAPI::init_input_device(bool p_reinit) {
Error err = audio_device_init(&audio_input, true, p_reinit);
if (err != OK) {
return err;
}
// Get the max frames
UINT32 max_frames;
HRESULT hr = audio_input.audio_client->GetBufferSize(&max_frames);
ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
input_buffer_init(max_frames);
return OK;
}
Error AudioDriverWASAPI::audio_device_finish(AudioDeviceWASAPI *p_device) {
if (p_device->active.is_set()) {
if (p_device->audio_client) {
p_device->audio_client->Stop();
}
p_device->active.clear();
}
SAFE_RELEASE(p_device->audio_client)
SAFE_RELEASE(p_device->render_client)
SAFE_RELEASE(p_device->capture_client)
return OK;
}
Error AudioDriverWASAPI::finish_output_device() {
return audio_device_finish(&audio_output);
}
Error AudioDriverWASAPI::finish_input_device() {
return audio_device_finish(&audio_input);
}
Error AudioDriverWASAPI::init() {
mix_rate = _get_configured_mix_rate();
target_latency_ms = Engine::get_singleton()->get_audio_output_latency();
exit_thread.clear();
Error err = init_output_device();
ERR_FAIL_COND_V_MSG(err != OK, err, "WASAPI: init_output_device error.");
thread.start(thread_func, this);
return OK;
}
int AudioDriverWASAPI::get_mix_rate() const {
return mix_rate;
}
float AudioDriverWASAPI::get_latency() {
return real_latency;
}
AudioDriver::SpeakerMode AudioDriverWASAPI::get_speaker_mode() const {
return get_speaker_mode_by_total_channels(channels);
}
PackedStringArray AudioDriverWASAPI::audio_device_get_list(bool p_input) {
PackedStringArray list;
ComPtr<IMMDeviceCollection> devices = nullptr;
ComPtr<IMMDeviceEnumerator> enumerator = nullptr;
list.push_back(String("Default"));
HRESULT hr = CoCreateInstance(CLSID_MMDeviceEnumerator, nullptr, CLSCTX_ALL, IID_IMMDeviceEnumerator, (void **)&enumerator);
ERR_FAIL_COND_V(hr != S_OK, PackedStringArray());
hr = enumerator->EnumAudioEndpoints(p_input ? eCapture : eRender, DEVICE_STATE_ACTIVE, &devices);
ERR_FAIL_COND_V(hr != S_OK, PackedStringArray());
UINT count = 0;
hr = devices->GetCount(&count);
ERR_FAIL_COND_V(hr != S_OK, PackedStringArray());
for (ULONG i = 0; i < count; i++) {
ComPtr<IMMDevice> output_device = nullptr;
hr = devices->Item(i, &output_device);
ERR_BREAK(hr != S_OK);
ComPtr<IPropertyStore> props = nullptr;
hr = output_device->OpenPropertyStore(STGM_READ, &props);
ERR_BREAK(hr != S_OK);
PROPVARIANT propvar;
PropVariantInit(&propvar);
hr = props->GetValue(PKEY_Device_FriendlyNameGodot, &propvar);
ERR_BREAK(hr != S_OK);
list.push_back(String(propvar.pwszVal));
PropVariantClear(&propvar);
}
return list;
}
PackedStringArray AudioDriverWASAPI::get_output_device_list() {
return audio_device_get_list(false);
}
String AudioDriverWASAPI::get_output_device() {
lock();
String name = audio_output.device_name;
unlock();
return name;
}
void AudioDriverWASAPI::set_output_device(const String &p_name) {
lock();
audio_output.new_device = p_name;
unlock();
}
int32_t AudioDriverWASAPI::read_sample(WORD format_tag, int bits_per_sample, BYTE *buffer, int i) {
if (format_tag == WAVE_FORMAT_PCM) {
int32_t sample = 0;
switch (bits_per_sample) {
case 8:
sample = int32_t(((int8_t *)buffer)[i]) << 24;
break;
case 16:
sample = int32_t(((int16_t *)buffer)[i]) << 16;
break;
case 24:
sample |= int32_t(((int8_t *)buffer)[i * 3 + 2]) << 24;
sample |= int32_t(((int8_t *)buffer)[i * 3 + 1]) << 16;
sample |= int32_t(((int8_t *)buffer)[i * 3 + 0]) << 8;
break;
case 32:
sample = ((int32_t *)buffer)[i];
break;
}
return sample;
} else if (format_tag == WAVE_FORMAT_IEEE_FLOAT) {
return int32_t(((float *)buffer)[i] * 32768.0) << 16;
} else {
ERR_PRINT("WASAPI: Unknown format tag");
}
return 0;
}
void AudioDriverWASAPI::write_sample(WORD format_tag, int bits_per_sample, BYTE *buffer, int i, int32_t sample) {
if (format_tag == WAVE_FORMAT_PCM) {
switch (bits_per_sample) {
case 8:
((int8_t *)buffer)[i] = sample >> 24;
break;
case 16:
((int16_t *)buffer)[i] = sample >> 16;
break;
case 24:
((int8_t *)buffer)[i * 3 + 2] = sample >> 24;
((int8_t *)buffer)[i * 3 + 1] = sample >> 16;
((int8_t *)buffer)[i * 3 + 0] = sample >> 8;
break;
case 32:
((int32_t *)buffer)[i] = sample;
break;
}
} else if (format_tag == WAVE_FORMAT_IEEE_FLOAT) {
((float *)buffer)[i] = (sample >> 16) / 32768.f;
} else {
ERR_PRINT("WASAPI: Unknown format tag");
}
}
void AudioDriverWASAPI::thread_func(void *p_udata) {
CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
AudioDriverWASAPI *ad = static_cast<AudioDriverWASAPI *>(p_udata);
uint32_t avail_frames = 0;
uint32_t write_ofs = 0;
while (!ad->exit_thread.is_set()) {
uint32_t read_frames = 0;
uint32_t written_frames = 0;
if (avail_frames == 0) {
ad->lock();
ad->start_counting_ticks();
if (ad->audio_output.active.is_set()) {
ad->audio_server_process(ad->buffer_frames, ad->samples_in.ptrw());
} else {
for (int i = 0; i < ad->samples_in.size(); i++) {
ad->samples_in.write[i] = 0;
}
}
avail_frames = ad->buffer_frames;
write_ofs = 0;
ad->stop_counting_ticks();
ad->unlock();
}
ad->lock();
ad->start_counting_ticks();
if (avail_frames > 0 && ad->audio_output.audio_client) {
UINT32 buffer_size;
UINT32 cur_frames;
bool invalidated = false;
HRESULT hr = ad->audio_output.audio_client->GetBufferSize(&buffer_size);
if (hr != S_OK) {
ERR_PRINT("WASAPI: GetBufferSize error");
}
hr = ad->audio_output.audio_client->GetCurrentPadding(&cur_frames);
if (hr == S_OK) {
// Check how much frames are available on the WASAPI buffer
UINT32 write_frames = MIN(buffer_size - cur_frames, avail_frames);
if (write_frames > 0) {
BYTE *buffer = nullptr;
hr = ad->audio_output.render_client->GetBuffer(write_frames, &buffer);
if (hr == S_OK) {
// We're using WASAPI Shared Mode so we must convert the buffer
if (ad->channels == ad->audio_output.channels) {
for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
ad->write_sample(ad->audio_output.format_tag, ad->audio_output.bits_per_sample, buffer, i, ad->samples_in.write[write_ofs++]);
}
} else if (ad->channels == ad->audio_output.channels + 1) {
// Pass all channels except the last two as-is, and then mix the last two
// together as one channel. E.g. stereo -> mono, or 3.1 -> 2.1.
unsigned int last_chan = ad->audio_output.channels - 1;
for (unsigned int i = 0; i < write_frames; i++) {
for (unsigned int j = 0; j < last_chan; j++) {
ad->write_sample(ad->audio_output.format_tag, ad->audio_output.bits_per_sample, buffer, i * ad->audio_output.channels + j, ad->samples_in.write[write_ofs++]);
}
int32_t l = ad->samples_in.write[write_ofs++];
int32_t r = ad->samples_in.write[write_ofs++];
int32_t c = (int32_t)(((int64_t)l + (int64_t)r) / 2);
ad->write_sample(ad->audio_output.format_tag, ad->audio_output.bits_per_sample, buffer, i * ad->audio_output.channels + last_chan, c);
}
} else {
for (unsigned int i = 0; i < write_frames; i++) {
for (unsigned int j = 0; j < MIN(ad->channels, ad->audio_output.channels); j++) {
ad->write_sample(ad->audio_output.format_tag, ad->audio_output.bits_per_sample, buffer, i * ad->audio_output.channels + j, ad->samples_in.write[write_ofs++]);
}
if (ad->audio_output.channels > ad->channels) {
for (unsigned int j = ad->channels; j < ad->audio_output.channels; j++) {
ad->write_sample(ad->audio_output.format_tag, ad->audio_output.bits_per_sample, buffer, i * ad->audio_output.channels + j, 0);
}
}
}
}
hr = ad->audio_output.render_client->ReleaseBuffer(write_frames, 0);
if (hr != S_OK) {
ERR_PRINT("WASAPI: Release buffer error");
}
avail_frames -= write_frames;
written_frames += write_frames;
} else if (hr == AUDCLNT_E_DEVICE_INVALIDATED) {
// output_device is not valid anymore, reopen it
Error err = ad->finish_output_device();
if (err != OK) {
ERR_PRINT("WASAPI: finish_output_device error");
} else {
// We reopened the output device and samples_in may have resized, so invalidate the current avail_frames
avail_frames = 0;
}
} else {
ERR_PRINT("WASAPI: Get buffer error");
ad->exit_thread.set();
}
}
} else if (hr == AUDCLNT_E_DEVICE_INVALIDATED) {
invalidated = true;
} else {
ERR_PRINT("WASAPI: GetCurrentPadding error");
}
if (invalidated) {
// output_device is not valid anymore
WARN_PRINT("WASAPI: Current output_device invalidated, closing output_device");
Error err = ad->finish_output_device();
if (err != OK) {
ERR_PRINT("WASAPI: finish_output_device error");
}
}
}
// If we're using the Default output device and it changed finish it so we'll re-init the output device
if (ad->audio_output.device_name == "Default" && default_output_device_changed) {
Error err = ad->finish_output_device();
if (err != OK) {
ERR_PRINT("WASAPI: finish_output_device error");
}
default_output_device_changed = false;
}
// User selected a new output device, finish the current one so we'll init the new output device
if (ad->audio_output.device_name != ad->audio_output.new_device) {
ad->audio_output.device_name = ad->audio_output.new_device;
Error err = ad->finish_output_device();
if (err != OK) {
ERR_PRINT("WASAPI: finish_output_device error");
}
}
if (!ad->audio_output.audio_client) {
Error err = ad->init_output_device(true);
if (err == OK) {
ad->start();
}
avail_frames = 0;
write_ofs = 0;
}
if (ad->audio_input.active.is_set()) {
UINT32 packet_length = 0;
BYTE *data;
UINT32 num_frames_available;
DWORD flags;
HRESULT hr = ad->audio_input.capture_client->GetNextPacketSize(&packet_length);
if (hr == S_OK) {
while (packet_length != 0) {
hr = ad->audio_input.capture_client->GetBuffer(&data, &num_frames_available, &flags, nullptr, nullptr);
ERR_BREAK(hr != S_OK);
// fixme: Only works for floating point atm
for (UINT32 j = 0; j < num_frames_available; j++) {
int32_t l, r;
if (flags & AUDCLNT_BUFFERFLAGS_SILENT) {
l = r = 0;
} else {
if (ad->audio_input.channels == 2) {
l = read_sample(ad->audio_input.format_tag, ad->audio_input.bits_per_sample, data, j * 2);
r = read_sample(ad->audio_input.format_tag, ad->audio_input.bits_per_sample, data, j * 2 + 1);
} else if (ad->audio_input.channels == 1) {
l = r = read_sample(ad->audio_input.format_tag, ad->audio_input.bits_per_sample, data, j);
} else {
l = r = 0;
ERR_PRINT("WASAPI: unsupported channel count in microphone!");
}
}
ad->input_buffer_write(l);
ad->input_buffer_write(r);
}
read_frames += num_frames_available;
hr = ad->audio_input.capture_client->ReleaseBuffer(num_frames_available);
ERR_BREAK(hr != S_OK);
hr = ad->audio_input.capture_client->GetNextPacketSize(&packet_length);
ERR_BREAK(hr != S_OK);
}
}
// If we're using the Default output device and it changed finish it so we'll re-init the output device
if (ad->audio_input.device_name == "Default" && default_input_device_changed) {
Error err = ad->finish_input_device();
if (err != OK) {
ERR_PRINT("WASAPI: finish_input_device error");
}
default_input_device_changed = false;
}
// User selected a new input device, finish the current one so we'll init the new input device
if (ad->audio_input.device_name != ad->audio_input.new_device) {
ad->audio_input.device_name = ad->audio_input.new_device;
Error err = ad->finish_input_device();
if (err != OK) {
ERR_PRINT("WASAPI: finish_input_device error");
}
}
if (!ad->audio_input.audio_client) {
Error err = ad->init_input_device(true);
if (err == OK) {
ad->input_start();
}
}
}
ad->stop_counting_ticks();
ad->unlock();
// Let the thread rest a while if we haven't read or write anything
if (written_frames == 0 && read_frames == 0) {
OS::get_singleton()->delay_usec(1000);
}
}
CoUninitialize();
}
void AudioDriverWASAPI::start() {
if (audio_output.audio_client) {
HRESULT hr = audio_output.audio_client->Start();
if (hr != S_OK) {
ERR_PRINT("WASAPI: Start failed");
} else {
audio_output.active.set();
}
}
}
void AudioDriverWASAPI::lock() {
mutex.lock();
}
void AudioDriverWASAPI::unlock() {
mutex.unlock();
}
void AudioDriverWASAPI::finish() {
exit_thread.set();
if (thread.is_started()) {
thread.wait_to_finish();
}
finish_input_device();
finish_output_device();
}
Error AudioDriverWASAPI::input_start() {
Error err = init_input_device();
if (err != OK) {
ERR_PRINT("WASAPI: init_input_device error");
return err;
}
if (audio_input.active.is_set()) {
return FAILED;
}
audio_input.audio_client->Start();
audio_input.active.set();
return OK;
}
Error AudioDriverWASAPI::input_stop() {
if (audio_input.active.is_set()) {
audio_input.audio_client->Stop();
audio_input.active.clear();
return OK;
}
return FAILED;
}
PackedStringArray AudioDriverWASAPI::get_input_device_list() {
return audio_device_get_list(true);
}
String AudioDriverWASAPI::get_input_device() {
lock();
String name = audio_input.device_name;
unlock();
return name;
}
void AudioDriverWASAPI::set_input_device(const String &p_name) {
lock();
audio_input.new_device = p_name;
unlock();
}
AudioDriverWASAPI::AudioDriverWASAPI() {
samples_in.clear();
}
#endif // WASAPI_ENABLED
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