Experimental microphone support.

drivers/alsa/audio_driver_alsa.cpp

@@ -339,6 +339,28 @@ void AudioDriverALSA::finish() {
 	finish_device();
 }
 
+bool AudioDriverALSA::capture_device_start(StringName p_name) {
+
+	return false;
+}
+
+bool AudioDriverALSA::capture_device_stop(StringName p_name) {
+
+	return false;
+}
+
+PoolStringArray AudioDriverALSA::capture_device_get_names() {
+
+	PoolStringArray names;
+
+	return names;
+}
+
+StringName AudioDriverALSA::capture_device_get_default_name() {
+
+	return "";
+}
+
 AudioDriverALSA::AudioDriverALSA() {
 
 	mutex = NULL;

drivers/alsa/audio_driver_alsa.h

@@ -83,6 +83,11 @@ public:
 	virtual void unlock();
 	virtual void finish();
 
+	virtual bool capture_device_start(StringName p_name);
+	virtual bool capture_device_stop(StringName p_name);
+	virtual PoolStringArray capture_device_get_names();
+	virtual StringName capture_device_get_default_name();
+
 	AudioDriverALSA();
 	~AudioDriverALSA();
 };

drivers/coreaudio/audio_driver_coreaudio.cpp

@@ -434,6 +434,28 @@ void AudioDriverCoreAudio::finish() {
 	}
 };
 
+bool AudioDriverCoreAudio::capture_device_start(StringName p_name) {
+
+	return false;
+}
+
+bool AudioDriverCoreAudio::capture_device_stop(StringName p_name) {
+
+	return false;
+}
+
+PoolStringArray AudioDriverCoreAudio::capture_device_get_names() {
+
+	PoolStringArray names;
+
+	return names;
+}
+
+StringName AudioDriverCoreAudio::capture_device_get_default_name() {
+
+	return "";
+}
+
 AudioDriverCoreAudio::AudioDriverCoreAudio() {
 	active = false;
 	mutex = NULL;

drivers/coreaudio/audio_driver_coreaudio.h

@@ -86,6 +86,11 @@ public:
 	virtual void unlock();
 	virtual void finish();
 
+	virtual bool capture_device_start(StringName p_name);
+	virtual bool capture_device_stop(StringName p_name);
+	virtual PoolStringArray capture_device_get_names();
+	virtual StringName capture_device_get_default_name();
+
 	bool try_lock();
 	void stop();
 

drivers/pulseaudio/audio_driver_pulseaudio.cpp

@@ -510,6 +510,28 @@ void AudioDriverPulseAudio::finish() {
 	thread = NULL;
 }
 
+bool AudioDriverPulseAudio::capture_device_start(StringName p_name) {
+
+	return false;
+}
+
+bool AudioDriverPulseAudio::capture_device_stop(StringName p_name) {
+
+	return false;
+}
+
+PoolStringArray AudioDriverPulseAudio::capture_device_get_names() {
+
+	PoolStringArray names;
+
+	return names;
+}
+
+StringName AudioDriverPulseAudio::capture_device_get_default_name() {
+
+	return "";
+}
+
 AudioDriverPulseAudio::AudioDriverPulseAudio() {
 
 	pa_ml = NULL;

drivers/pulseaudio/audio_driver_pulseaudio.h

@@ -98,6 +98,11 @@ public:
 	virtual void unlock();
 	virtual void finish();
 
+	virtual bool capture_device_start(StringName p_name);
+	virtual bool capture_device_stop(StringName p_name);
+	virtual PoolStringArray capture_device_get_names();
+	virtual StringName capture_device_get_default_name();
+
 	virtual float get_latency();
 
 	AudioDriverPulseAudio();

drivers/rtaudio/audio_driver_rtaudio.cpp

@@ -194,6 +194,28 @@ void AudioDriverRtAudio::finish() {
 	}
 }
 
+bool AudioDriverRtAudio::capture_device_start(StringName p_name) {
+
+	return false;
+}
+
+bool AudioDriverRtAudio::capture_device_stop(StringName p_name) {
+
+	return false;
+}
+
+PoolStringArray AudioDriverRtAudio::capture_device_get_names() {
+
+	PoolStringArray names;
+
+	return names;
+}
+
+StringName AudioDriverRtAudio::capture_device_get_default_name() {
+
+	return "";
+}
+
 AudioDriverRtAudio::AudioDriverRtAudio() {
 
 	active = false;

drivers/rtaudio/audio_driver_rtaudio.h

@@ -58,6 +58,11 @@ public:
 	virtual void unlock();
 	virtual void finish();
 
+	virtual bool capture_device_start(StringName p_name);
+	virtual bool capture_device_stop(StringName p_name);
+	virtual PoolStringArray capture_device_get_names();
+	virtual StringName capture_device_get_default_name();
+
 	AudioDriverRtAudio();
 };
 

drivers/wasapi/audio_driver_wasapi.cpp

@@ -32,6 +32,8 @@
 
 #include "audio_driver_wasapi.h"
 
+#include <Functiondiscoverykeys_devpkey.h>
+
 #include "os/os.h"
 #include "project_settings.h"
 
@@ -52,8 +54,20 @@ const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator);
 const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator);
 const IID IID_IAudioClient = __uuidof(IAudioClient);
 const IID IID_IAudioRenderClient = __uuidof(IAudioRenderClient);
+const IID IID_IAudioCaptureClient = __uuidof(IAudioCaptureClient);
+
+#define SAFE_RELEASE(memory) \
+	if ((memory) != NULL) {  \
+		(memory)->Release(); \
+		(memory) = NULL;     \
+	}
 
-static bool default_device_changed = false;
+#define REFTIMES_PER_SEC 10000000
+#define REFTIMES_PER_MILLISEC 10000
+
+static StringName capture_device_id;
+static bool default_render_device_changed = false;
+static bool default_capture_device_changed = false;
 
 class CMMNotificationClient : public IMMNotificationClient {
 	LONG _cRef;
@@ -109,8 +123,13 @@ public:
 	}
 
 	HRESULT STDMETHODCALLTYPE OnDefaultDeviceChanged(EDataFlow flow, ERole role, LPCWSTR pwstrDeviceId) {
-		if (flow == eRender && role == eConsole) {
-			default_device_changed = true;
+		if (role == eConsole) {
+			if (flow == eRender) {
+				default_render_device_changed = true;
+			} else if (flow == eCapture) {
+				default_capture_device_changed = true;
+				capture_device_id = String(pwstrDeviceId);
+			}
 		}
 
 		return S_OK;
@@ -123,7 +142,7 @@ public:
 
 static CMMNotificationClient notif_client;
 
-Error AudioDriverWASAPI::init_device(bool reinit) {
+Error AudioDriverWASAPI::init_render_device(bool reinit) {
 
 	WAVEFORMATEX *pwfex;
 	IMMDeviceEnumerator *enumerator = NULL;
@@ -200,11 +219,15 @@ Error AudioDriverWASAPI::init_device(bool reinit) {
 	}
 
 	hr = enumerator->RegisterEndpointNotificationCallback(&notif_client);
+	SAFE_RELEASE(enumerator)
+
 	if (hr != S_OK) {
 		ERR_PRINT("WASAPI: RegisterEndpointNotificationCallback error");
 	}
 
 	hr = device->Activate(IID_IAudioClient, CLSCTX_ALL, NULL, (void **)&audio_client);
+	SAFE_RELEASE(device)
+
 	if (reinit) {
 		if (hr != S_OK) {
 			return ERR_CANT_OPEN;
@@ -288,10 +311,181 @@ Error AudioDriverWASAPI::init_device(bool reinit) {
 		print_line("WASAPI: audio buffer frames: " + itos(buffer_frames) + " calculated latency: " + itos(buffer_frames * 1000 / mix_rate) + "ms");
 	}
 
+	// Free memory
+	CoTaskMemFree(pwfex);
+
 	return OK;
 }
 
-Error AudioDriverWASAPI::finish_device() {
+StringName AudioDriverWASAPI::get_default_capture_device_name(IMMDeviceEnumerator *p_enumerator) {
+	// Setup default device
+	IMMDevice *default_device = NULL;
+	LPWSTR pwszID = NULL;
+	IPropertyStore *props = NULL;
+
+	HRESULT hr = p_enumerator->GetDefaultAudioEndpoint(
+			eCapture, eConsole, &default_device);
+	ERR_FAIL_COND_V(hr != S_OK, "");
+
+	// Get the device ID
+	hr = default_device->GetId(&pwszID);
+	ERR_FAIL_COND_V(hr != S_OK, "");
+
+	// Get the device properties
+	hr = default_device->OpenPropertyStore(
+			STGM_READ, &props);
+	ERR_FAIL_COND_V(hr != S_OK, "");
+
+	PROPVARIANT var_name;
+	PropVariantInit(&var_name);
+
+	// Get the name of the device
+	hr = props->GetValue(PKEY_Device_FriendlyName, &var_name);
+	ERR_FAIL_COND_V(hr != S_OK, "");
+
+	// Return the name of device
+	return String(var_name.pwszVal);
+}
+
+Error AudioDriverWASAPI::init_capture_devices(bool reinit) {
+
+	WAVEFORMATEX *pwfex;
+	IMMDeviceEnumerator *enumerator = NULL;
+	IMMDeviceCollection *device_collection = NULL;
+	IPropertyStore *props = NULL;
+
+	capture_device_id_map.clear();
+
+	HRESULT hr = CoCreateInstance(CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL, IID_IMMDeviceEnumerator, (void **)&enumerator);
+	ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+	capture_device_default_name = get_default_capture_device_name(enumerator);
+
+	// Enumerate a collection of valid devices
+	hr = enumerator->EnumAudioEndpoints(eCapture, DEVICE_STATE_ACTIVE, &device_collection);
+	ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+	SAFE_RELEASE(enumerator);
+
+	UINT count;
+	hr = device_collection->GetCount(&count);
+	ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+	// Loop through the device count
+	for (unsigned int i = 0; i < count; i++) {
+		IMMDevice *device = NULL;
+		LPWSTR pwszID = NULL;
+
+		// Get the device
+		hr = device_collection->Item(i, &device);
+		ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+		// Get the device ID
+		hr = device->GetId(&pwszID);
+		ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+		// Get the device properties
+		hr = device->OpenPropertyStore(STGM_READ, &props);
+		ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+		PROPVARIANT var_name;
+		PropVariantInit(&var_name);
+
+		// Get the name of the device
+		hr = props->GetValue(PKEY_Device_FriendlyName, &var_name);
+		ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+		// Save the name of device
+		StringName name = String(var_name.pwszVal);
+
+		// DEBUG: print the device name and ID
+		printf("Endpoint %d: \"%S\" (%S)\n", i, var_name.pwszVal, pwszID);
+
+		capture_device_id_map[StringName(pwszID)] = name;
+
+		// Cleanup the ID and properties
+		CoTaskMemFree(pwszID);
+		pwszID = NULL;
+		PropVariantClear(&var_name);
+		SAFE_RELEASE(props)
+
+		// Create a new audio in block descriptor
+		MicrophoneDeviceOutputDirectWASAPI *microphone_device_output_wasapi = memnew(MicrophoneDeviceOutputDirectWASAPI);
+		microphone_device_output_wasapi->name = name;
+		microphone_device_output_wasapi->active = false;
+
+		// Push it into the list and assign it to the hash map for quick access
+		microphone_device_outputs.push_back(microphone_device_output_wasapi);
+		microphone_device_output_map[name] = microphone_device_output_wasapi;
+
+		// Activate the device
+		hr = device->Activate(IID_IAudioClient, CLSCTX_ALL, NULL, (void **)&microphone_device_output_wasapi->audio_client);
+		SAFE_RELEASE(device)
+
+		// Get the sample rate (hz)
+		hr = microphone_device_output_wasapi->audio_client->GetMixFormat(&pwfex);
+		ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+		microphone_device_output_wasapi->channels = pwfex->nChannels;
+		microphone_device_output_wasapi->mix_rate = pwfex->nSamplesPerSec;
+		microphone_device_output_wasapi->bits_per_sample = pwfex->wBitsPerSample;
+		microphone_device_output_wasapi->frame_size = (microphone_device_output_wasapi->bits_per_sample / 8) * microphone_device_output_wasapi->channels;
+
+		microphone_device_output_wasapi->current_capture_index = 0;
+
+		if (pwfex->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
+			WAVEFORMATEXTENSIBLE *wfex = (WAVEFORMATEXTENSIBLE *)pwfex;
+
+			if (wfex->SubFormat == KSDATAFORMAT_SUBTYPE_PCM) {
+				microphone_device_output_wasapi->microphone_format = MicrophoneDeviceOutputDirect::FORMAT_PCM;
+			} else if (wfex->SubFormat == KSDATAFORMAT_SUBTYPE_IEEE_FLOAT) {
+				microphone_device_output_wasapi->microphone_format = MicrophoneDeviceOutputDirect::FORMAT_FLOAT;
+			} else {
+				ERR_PRINT("WASAPI: Format not supported");
+				ERR_FAIL_V(ERR_CANT_OPEN);
+			}
+		} else {
+			if (pwfex->wFormatTag != WAVE_FORMAT_PCM && pwfex->wFormatTag != WAVE_FORMAT_IEEE_FLOAT) {
+				ERR_PRINT("WASAPI: Format not supported");
+				ERR_FAIL_V(ERR_CANT_OPEN);
+			} else {
+				if (pwfex->wFormatTag == WAVE_FORMAT_PCM) {
+					microphone_device_output_wasapi->microphone_format = MicrophoneDeviceOutputDirect::FORMAT_PCM;
+				} else {
+					microphone_device_output_wasapi->microphone_format = MicrophoneDeviceOutputDirect::FORMAT_FLOAT;
+				}
+			}
+		}
+
+		hr = microphone_device_output_wasapi->audio_client->Initialize(AUDCLNT_SHAREMODE_SHARED, 0, REFTIMES_PER_SEC, 0, pwfex, NULL);
+		ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+		// Get the max frames
+		UINT32 max_frames;
+		hr = microphone_device_output_wasapi->audio_client->GetBufferSize(&max_frames);
+		ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+		// Set the buffer size
+		microphone_device_output_wasapi->buffer.resize(max_frames * 10); // 10 second test buffer (will crash after it's been filled due to lack of looping)
+		memset(microphone_device_output_wasapi->buffer.ptrw(), 0x00, microphone_device_output_wasapi->buffer.size() * microphone_device_output_wasapi->frame_size);
+
+		// Get the capture client
+		hr = microphone_device_output_wasapi->audio_client->GetService(IID_IAudioCaptureClient, (void **)&microphone_device_output_wasapi->capture_client);
+		ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
+
+		// TODO: set audio write stream to correct format
+		REFERENCE_TIME hns_actual_duration = (double)REFTIMES_PER_SEC * max_frames / pwfex->nSamplesPerSec;
+
+		// Free memory
+		CoTaskMemFree(pwfex);
+		SAFE_RELEASE(device)
+	}
+	SAFE_RELEASE(device_collection)
+
+	return OK;
+}
+
+Error AudioDriverWASAPI::finish_render_device() {
 
 	if (audio_client) {
 		if (active) {
@@ -303,14 +497,21 @@ Error AudioDriverWASAPI::finish_device() {
 		audio_client = NULL;
 	}
 
-	if (render_client) {
-		render_client->Release();
-		render_client = NULL;
-	}
+	SAFE_RELEASE(render_client)
+	SAFE_RELEASE(audio_client)
 
-	if (audio_client) {
-		audio_client->Release();
-		audio_client = NULL;
+	return OK;
+}
+
+Error AudioDriverWASAPI::finish_capture_devices() {
+
+	microphone_device_output_map.clear();
+	while (microphone_device_outputs.size() > 0) {
+		MicrophoneDeviceOutputDirectWASAPI *microphone_device_output = static_cast<MicrophoneDeviceOutputDirectWASAPI *>(microphone_device_outputs.get(0));
+		SAFE_RELEASE(microphone_device_output->capture_client)
+		SAFE_RELEASE(microphone_device_output->audio_client)
+		microphone_device_outputs.erase(microphone_device_output);
+		memdelete(microphone_device_output);
 	}
 
 	return OK;
@@ -320,9 +521,14 @@ Error AudioDriverWASAPI::init() {
 
 	mix_rate = GLOBAL_DEF_RST("audio/mix_rate", DEFAULT_MIX_RATE);
 
-	Error err = init_device();
+	Error err = init_render_device();
 	if (err != OK) {
-		ERR_PRINT("WASAPI: init_device error");
+		ERR_PRINT("WASAPI: init_render_device error");
+	}
+
+	err = init_capture_devices();
+	if (err != OK) {
+		ERR_PRINT("WASAPI: init_capture_device error");
 	}
 
 	active = false;
@@ -439,6 +645,78 @@ void AudioDriverWASAPI::thread_func(void *p_udata) {
 	AudioDriverWASAPI *ad = (AudioDriverWASAPI *)p_udata;
 
 	while (!ad->exit_thread) {
+		// Capture
+
+		if (default_capture_device_changed) {
+			if (ad->capture_device_id_map.has(capture_device_id)) {
+				Map<StringName, StringName>::Element *e = ad->capture_device_id_map.find(capture_device_id);
+				ad->lock();
+				ad->start_counting_ticks();
+
+				ad->capture_device_default_name = e->get();
+				ad->update_microphone_default(ad->capture_device_default_name);
+
+				default_capture_device_changed = false;
+
+				ad->stop_counting_ticks();
+				ad->unlock();
+			}
+		}
+
+		for (int i = 0; i < ad->microphone_device_outputs.size(); i++) {
+			MicrophoneDeviceOutputDirectWASAPI *microphone_device_output_wasapi = static_cast<MicrophoneDeviceOutputDirectWASAPI *>(ad->microphone_device_outputs[i]);
+
+			if (microphone_device_output_wasapi->active == false) {
+				continue;
+			}
+
+			UINT32 packet_length = 0;
+			BYTE *data;
+			UINT32 num_frames_available;
+			DWORD flags;
+
+			HRESULT hr = microphone_device_output_wasapi->capture_client->GetNextPacketSize(&packet_length);
+			ERR_BREAK(hr != S_OK);
+
+			while (packet_length != 0) {
+				hr = microphone_device_output_wasapi->capture_client->GetBuffer(&data, &num_frames_available, &flags, NULL, NULL);
+				ERR_BREAK(hr != S_OK);
+
+				unsigned int frames_to_copy = num_frames_available;
+
+				if (flags & AUDCLNT_BUFFERFLAGS_SILENT) {
+					memset((char *)(microphone_device_output_wasapi->buffer.ptrw()) + (microphone_device_output_wasapi->current_capture_index * microphone_device_output_wasapi->frame_size), 0, frames_to_copy * microphone_device_output_wasapi->frame_size);
+				} else {
+					// fixme: Only works for floating point atm
+					if (microphone_device_output_wasapi->channels == 2) {
+						for (int j = 0; j < frames_to_copy; j++) {
+							float left = *(((float *)data) + (j * 2));
+							float right = *(((float *)data) + (j * 2) + 1);
+							microphone_device_output_wasapi->buffer[microphone_device_output_wasapi->current_capture_index + j] = AudioFrame(left, right);
+						}
+					} else if (microphone_device_output_wasapi->channels == 1) {
+						for (int j = 0; j < frames_to_copy; j++) {
+							float value = *(((float *)data) + j);
+							microphone_device_output_wasapi->buffer[microphone_device_output_wasapi->current_capture_index + j] = AudioFrame(value, value);
+						}
+					} else {
+						ERR_PRINT("WASAPI: unsupported channel count in microphone!");
+					}
+				}
+
+				hr = microphone_device_output_wasapi->capture_client->ReleaseBuffer(num_frames_available);
+				ERR_BREAK(hr != S_OK);
+
+				hr = microphone_device_output_wasapi->capture_client->GetNextPacketSize(&packet_length);
+				ERR_BREAK(hr != S_OK);
+
+				microphone_device_output_wasapi->current_capture_index += frames_to_copy;
+
+				// Test: ensuring the read index is always behind the capture index keeps the input and output reliably in sync, but it
+				// also results in clipping, stutter and other audio artefacts
+				microphone_device_output_wasapi->set_read_index(microphone_device_output_wasapi->current_capture_index - 8192);
+			}
+		}
 
 		ad->lock();
 		ad->start_counting_ticks();
@@ -514,9 +792,9 @@ void AudioDriverWASAPI::thread_func(void *p_udata) {
 				// Device is not valid anymore
 				WARN_PRINT("WASAPI: Current device invalidated, closing device");
 
-				Error err = ad->finish_device();
+				Error err = ad->finish_render_device();
 				if (err != OK) {
-					ERR_PRINT("WASAPI: finish_device error");
+					ERR_PRINT("WASAPI: finish_render_device error");
 				}
 			}
 
@@ -528,26 +806,26 @@ void AudioDriverWASAPI::thread_func(void *p_udata) {
 		ad->start_counting_ticks();
 
 		// If we're using the Default device and it changed finish it so we'll re-init the device
-		if (ad->device_name == "Default" && default_device_changed) {
-			Error err = ad->finish_device();
+		if (ad->device_name == "Default" && default_render_device_changed) {
+			Error err = ad->finish_render_device();
 			if (err != OK) {
-				ERR_PRINT("WASAPI: finish_device error");
+				ERR_PRINT("WASAPI: finish_render_device error");
 			}
 
-			default_device_changed = false;
+			default_render_device_changed = false;
 		}
 
 		// User selected a new device, finish the current one so we'll init the new device
 		if (ad->device_name != ad->new_device) {
 			ad->device_name = ad->new_device;
-			Error err = ad->finish_device();
+			Error err = ad->finish_render_device();
 			if (err != OK) {
-				ERR_PRINT("WASAPI: finish_device error");
+				ERR_PRINT("WASAPI: finish_render_device error");
 			}
 		}
 
 		if (!ad->audio_client) {
-			Error err = ad->init_device(true);
+			Error err = ad->init_render_device(true);
 			if (err == OK) {
 				ad->start();
 			}
@@ -594,7 +872,8 @@ void AudioDriverWASAPI::finish() {
 		thread = NULL;
 	}
 
-	finish_device();
+	finish_capture_devices();
+	finish_render_device();
 
 	if (mutex) {
 		memdelete(mutex);
@@ -602,6 +881,58 @@ void AudioDriverWASAPI::finish() {
 	}
 }
 
+bool AudioDriverWASAPI::capture_device_start(StringName p_name) {
+
+	if (microphone_device_output_map.has(p_name)) {
+		MicrophoneDeviceOutputDirectWASAPI *microphone_device_output_wasapi = static_cast<MicrophoneDeviceOutputDirectWASAPI *>(microphone_device_output_map[p_name]);
+		if (microphone_device_output_wasapi->active == false) {
+			microphone_device_output_wasapi->audio_client->Start();
+			microphone_device_output_wasapi->active = true;
+			microphone_device_output_wasapi->set_read_index(-2048);
+		}
+
+		return true;
+	}
+
+	return false;
+}
+
+bool AudioDriverWASAPI::capture_device_stop(StringName p_name) {
+
+	if (microphone_device_output_map.has(p_name)) {
+		MicrophoneDeviceOutputDirectWASAPI *microphone_device_output_wasapi = static_cast<MicrophoneDeviceOutputDirectWASAPI *>(microphone_device_output_map[p_name]);
+		if (microphone_device_output_wasapi->active == true) {
+			microphone_device_output_wasapi->audio_client->Stop();
+			microphone_device_output_wasapi->active = false;
+		}
+
+		return true;
+	}
+
+	return false;
+}
+
+PoolStringArray AudioDriverWASAPI::capture_device_get_names() {
+
+	PoolStringArray names;
+
+	for (int i = 0; i < microphone_device_outputs.size(); i++) {
+		MicrophoneDeviceOutputDirectWASAPI *microphone_device_output_wasapi = static_cast<MicrophoneDeviceOutputDirectWASAPI *>(microphone_device_outputs.get(i));
+		names.push_back(microphone_device_output_wasapi->name);
+	}
+
+	return names;
+}
+
+StringName AudioDriverWASAPI::capture_device_get_default_name() {
+
+	lock();
+	StringName capture_device_default_name_local = capture_device_default_name;
+	unlock();
+
+	return capture_device_default_name_local;
+}
+
 AudioDriverWASAPI::AudioDriverWASAPI() {
 
 	audio_client = NULL;
@@ -626,6 +957,7 @@ AudioDriverWASAPI::AudioDriverWASAPI() {
 
 	device_name = "Default";
 	new_device = "Default";
+	capture_device_default_name = "";
 }
 
 #endif

drivers/wasapi/audio_driver_wasapi.h

@@ -44,19 +44,30 @@
 class AudioDriverWASAPI : public AudioDriver {
 
 	HANDLE event;
+	// Audio out
 	IAudioClient *audio_client;
 	IAudioRenderClient *render_client;
+	// Microphone
+	class MicrophoneDeviceOutputDirectWASAPI : public MicrophoneDeviceOutputDirect {
+	public:
+		IAudioClient *audio_client;
+		IAudioCaptureClient *capture_client;
+	};
+	//
 	Mutex *mutex;
 	Thread *thread;
 
 	String device_name;
 	String new_device;
+	String capture_device_default_name;
 
 	WORD format_tag;
 	WORD bits_per_sample;
 
 	Vector<int32_t> samples_in;
 
+	Map<StringName, StringName> capture_device_id_map;
+
 	unsigned int buffer_size;
 	unsigned int channels;
 	unsigned int wasapi_channels;
@@ -70,8 +81,13 @@ class AudioDriverWASAPI : public AudioDriver {
 	_FORCE_INLINE_ void write_sample(AudioDriverWASAPI *ad, BYTE *buffer, int i, int32_t sample);
 	static void thread_func(void *p_udata);
 
-	Error init_device(bool reinit = false);
-	Error finish_device();
+	StringName get_default_capture_device_name(IMMDeviceEnumerator *p_enumerator);
+
+	Error init_render_device(bool reinit = false);
+	Error init_capture_devices(bool reinit = false);
+
+	Error finish_render_device();
+	Error finish_capture_devices();
 
 public:
 	virtual const char *get_name() const {
@@ -89,6 +105,11 @@ public:
 	virtual void unlock();
 	virtual void finish();
 
+	virtual bool capture_device_start(StringName p_name);
+	virtual bool capture_device_stop(StringName p_name);
+	virtual PoolStringArray capture_device_get_names();
+	virtual StringName capture_device_get_default_name();
+
 	AudioDriverWASAPI();
 };
 

drivers/xaudio2/audio_driver_xaudio2.cpp

@@ -210,6 +210,28 @@ void AudioDriverXAudio2::finish() {
 	thread = NULL;
 };
 
+bool AudioDriverXAudio2::capture_device_start(StringName p_name) {
+
+	return false;
+}
+
+bool AudioDriverXAudio2::capture_device_stop(StringName p_name) {
+
+	return false;
+}
+
+PoolStringArray AudioDriverXAudio2::capture_device_get_names() {
+
+	PoolStringArray names;
+
+	return names;
+}
+
+StringName AudioDriverXAudio2::capture_device_get_default_name() {
+
+	return "";
+}
+
 AudioDriverXAudio2::AudioDriverXAudio2() {
 
 	mutex = NULL;

drivers/xaudio2/audio_driver_xaudio2.h

@@ -103,6 +103,11 @@ public:
 	virtual void unlock();
 	virtual void finish();
 
+	virtual bool capture_device_start(StringName p_name);
+	virtual bool capture_device_stop(StringName p_name);
+	virtual PoolStringArray capture_device_get_names();
+	virtual StringName capture_device_get_default_name();
+
 	AudioDriverXAudio2();
 	~AudioDriverXAudio2();
 };

platform/android/audio_driver_jandroid.cpp

@@ -195,6 +195,28 @@ void AudioDriverAndroid::finish() {
 	active = false;
 }
 
+bool AudioDriverAndroid::capture_device_start(StringName p_name) {
+
+	return false;
+}
+
+bool AudioDriverAndroid::capture_device_stop(StringName p_name) {
+
+	return false;
+}
+
+PoolStringArray AudioDriverAndroid::capture_device_get_names() {
+
+	PoolStringArray names;
+
+	return names;
+}
+
+StringName AudioDriverAndroid::capture_device_get_default_name() {
+
+	return "";
+}
+
 void AudioDriverAndroid::set_pause(bool p_pause) {
 
 	JNIEnv *env = ThreadAndroid::get_env();

platform/android/audio_driver_jandroid.h

@@ -70,6 +70,11 @@ public:
 	virtual void unlock();
 	virtual void finish();
 
+	virtual bool capture_device_start(StringName p_name);
+	virtual bool capture_device_stop(StringName p_name);
+	virtual PoolStringArray capture_device_get_names();
+	virtual StringName capture_device_get_default_name();
+
 	virtual void set_pause(bool p_pause);
 
 	static void setup(jobject p_io);

platform/android/audio_driver_opensl.cpp

@@ -249,6 +249,28 @@ void AudioDriverOpenSL::finish() {
 	(*sl)->Destroy(sl);
 }
 
+bool AudioDriverOpenSL::capture_device_start(StringName p_name) {
+
+	return false;
+}
+
+bool AudioDriverOpenSL::capture_device_stop(StringName p_name) {
+
+	return false;
+}
+
+PoolStringArray AudioDriverOpenSL::capture_device_get_names() {
+
+	PoolStringArray names;
+
+	return names;
+}
+
+StringName AudioDriverOpenSL::capture_device_get_default_name() {
+
+	return "";
+}
+
 void AudioDriverOpenSL::set_pause(bool p_pause) {
 
 	pause = p_pause;

platform/android/audio_driver_opensl.h

@@ -98,6 +98,11 @@ public:
 	virtual void unlock();
 	virtual void finish();
 
+	virtual bool capture_device_start(StringName p_name);
+	virtual bool capture_device_stop(StringName p_name);
+	virtual PoolStringArray capture_device_get_names();
+	virtual StringName capture_device_get_default_name();
+
 	virtual void set_pause(bool p_pause);
 
 	AudioDriverOpenSL();

servers/audio/audio_driver_dummy.cpp

@@ -125,6 +125,28 @@ void AudioDriverDummy::finish() {
 	thread = NULL;
 };
 
+bool AudioDriverDummy::capture_device_start(StringName p_name) {
+
+	return false;
+}
+
+bool AudioDriverDummy::capture_device_stop(StringName p_name) {
+
+	return false;
+}
+
+PoolStringArray AudioDriverDummy::capture_device_get_names() {
+
+	PoolStringArray names;
+
+	return names;
+}
+
+StringName AudioDriverDummy::capture_device_get_default_name() {
+
+	return "";
+}
+
 AudioDriverDummy::AudioDriverDummy() {
 
 	mutex = NULL;

servers/audio/audio_driver_dummy.h

@@ -68,6 +68,11 @@ public:
 	virtual void unlock();
 	virtual void finish();
 
+	virtual bool capture_device_start(StringName p_name);
+	virtual bool capture_device_stop(StringName p_name);
+	virtual PoolStringArray capture_device_get_names();
+	virtual StringName capture_device_get_default_name();
+
 	AudioDriverDummy();
 	~AudioDriverDummy();
 };

servers/audio/audio_stream.cpp

@@ -99,6 +99,129 @@ void AudioStream::_bind_methods() {
 
 ////////////////////////////////
 
+Ref<AudioStreamPlayback> AudioStreamMicrophone::instance_playback() {
+	Ref<AudioStreamPlaybackMicrophone> playback;
+	playback.instance();
+
+	playbacks.insert(playback.ptr());
+
+	playback->microphone = Ref<AudioStreamMicrophone>((AudioStreamMicrophone *)this);
+	playback->active = false;
+
+	return playback;
+}
+
+String AudioStreamMicrophone::get_stream_name() const {
+
+	//if (audio_stream.is_valid()) {
+	//return "Random: " + audio_stream->get_name();
+	//}
+	return "Microphone";
+}
+
+void AudioStreamMicrophone::set_microphone_name(const String &p_name) {
+	if (microphone_name != p_name) {
+		microphone_name = p_name;
+
+		for (Set<AudioStreamPlaybackMicrophone *>::Element *E = playbacks.front(); E; E = E->next()) {
+			if (E->get()->active) {
+				// Is this the right thing to do?
+				E->get()->stop();
+				E->get()->start();
+			}
+		}
+	}
+}
+
+StringName AudioStreamMicrophone::get_microphone_name() const {
+	return microphone_name;
+}
+
+float AudioStreamMicrophone::get_length() const {
+	return 0;
+}
+
+void AudioStreamMicrophone::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("set_microphone_name", "name"), &AudioStreamMicrophone::set_microphone_name);
+	ClassDB::bind_method(D_METHOD("get_microphone_name"), &AudioStreamMicrophone::get_microphone_name);
+
+	ADD_PROPERTY(PropertyInfo(Variant::STRING, "microphone_name"), "set_microphone_name", "get_microphone_name");
+}
+
+AudioStreamMicrophone::AudioStreamMicrophone() {
+}
+
+void AudioStreamPlaybackMicrophone::_mix_internal(AudioFrame *p_buffer, int p_frames) {
+
+	AudioDriver::MicrophoneDeviceOutput *microphone_device_output = reciever->owner;
+	const Vector<AudioFrame> &source_buffer = microphone_device_output->get_buffer();
+
+	if (microphone_device_output->get_read_index() >= 0) {
+		for (int i = 0; i < p_frames; i++) {
+			p_buffer[i] = source_buffer[internal_mic_offset + microphone_device_output->get_read_index() + i];
+		}
+	}
+
+	internal_mic_offset += p_frames;
+}
+
+void AudioStreamPlaybackMicrophone::mix(AudioFrame *p_buffer, float p_rate_scale, int p_frames) {
+	AudioStreamPlaybackResampled::mix(p_buffer, p_rate_scale, p_frames);
+	internal_mic_offset = 0; // Reset
+}
+
+float AudioStreamPlaybackMicrophone::get_stream_sampling_rate() {
+	return reciever->owner->get_mix_rate();
+}
+
+void AudioStreamPlaybackMicrophone::start(float p_from_pos) {
+	active = true;
+
+	// note: can this be called twice?
+	reciever = AudioServer::get_singleton()->create_microphone_reciever(microphone->get_microphone_name());
+	if (reciever == NULL) {
+		active = false;
+	}
+
+	_begin_resample();
+}
+
+void AudioStreamPlaybackMicrophone::stop() {
+	active = false;
+	if (reciever != NULL) {
+		AudioServer::get_singleton()->destroy_microphone_reciever(reciever);
+		reciever = NULL;
+	}
+}
+
+bool AudioStreamPlaybackMicrophone::is_playing() const {
+	return active;
+}
+
+int AudioStreamPlaybackMicrophone::get_loop_count() const {
+	return 0;
+}
+
+float AudioStreamPlaybackMicrophone::get_playback_position() const {
+	return 0;
+}
+
+void AudioStreamPlaybackMicrophone::seek(float p_time) {
+	return; // Can't seek a microphone input
+}
+
+AudioStreamPlaybackMicrophone::~AudioStreamPlaybackMicrophone() {
+	microphone->playbacks.erase(this);
+	stop();
+}
+
+AudioStreamPlaybackMicrophone::AudioStreamPlaybackMicrophone() {
+	internal_mic_offset = 0;
+	reciever = NULL;
+}
+
+////////////////////////////////
+
 void AudioStreamRandomPitch::set_audio_stream(const Ref<AudioStream> &p_audio_stream) {
 
 	audio_stream = p_audio_stream;

servers/audio/audio_stream.h

@@ -94,6 +94,66 @@ public:
 	virtual float get_length() const = 0; //if supported, otherwise return 0
 };
 
+// Microphone
+
+class AudioStreamPlaybackMicrophone;
+
+class AudioStreamMicrophone : public AudioStream {
+
+	GDCLASS(AudioStreamMicrophone, AudioStream)
+	friend class AudioStreamPlaybackMicrophone;
+
+	Set<AudioStreamPlaybackMicrophone *> playbacks;
+	StringName microphone_name;
+
+protected:
+	static void _bind_methods();
+
+public:
+	virtual Ref<AudioStreamPlayback> instance_playback();
+	virtual String get_stream_name() const;
+
+	void set_microphone_name(const String &p_name);
+	StringName get_microphone_name() const;
+
+	virtual float get_length() const; //if supported, otherwise return 0
+
+	AudioStreamMicrophone();
+};
+
+class AudioStreamPlaybackMicrophone : public AudioStreamPlaybackResampled {
+
+	GDCLASS(AudioStreamPlaybackMicrophone, AudioStreamPlayback)
+	friend class AudioStreamMicrophone;
+
+	bool active;
+	uint64_t internal_mic_offset;
+
+	Ref<AudioStreamMicrophone> microphone;
+	AudioDriver::MicrophoneReciever *reciever;
+
+protected:
+	virtual void _mix_internal(AudioFrame *p_buffer, int p_frames);
+	virtual float get_stream_sampling_rate();
+
+public:
+	virtual void mix(AudioFrame *p_buffer, float p_rate_scale, int p_frames);
+
+	virtual void start(float p_from_pos = 0.0);
+	virtual void stop();
+	virtual bool is_playing() const;
+
+	virtual int get_loop_count() const; //times it looped
+
+	virtual float get_playback_position() const;
+	virtual void seek(float p_time);
+
+	~AudioStreamPlaybackMicrophone();
+	AudioStreamPlaybackMicrophone();
+};
+
+//
+
 class AudioStreamPlaybackRandomPitch;
 
 class AudioStreamRandomPitch : public AudioStream {

servers/audio_server.cpp

@@ -33,6 +33,7 @@
 #include "os/file_access.h"
 #include "os/os.h"
 #include "project_settings.h"
+#include "scene/resources/audio_stream_sample.h"
 #include "servers/audio/audio_driver_dummy.h"
 #include "servers/audio/effects/audio_effect_compressor.h"
 #ifdef TOOLS_ENABLED
@@ -72,6 +73,42 @@ void AudioDriver::update_mix_time(int p_frames) {
 		_last_mix_time = OS::get_singleton()->get_ticks_usec();
 }
 
+void AudioDriver::update_microphone_default(StringName p_device_name) {
+	if (default_microphone_device_output != NULL) {
+		MicrophoneDeviceOutput *output = default_microphone_device_output->owner;
+		output->remove_reciever(default_microphone_device_output);
+
+		while (output != NULL) {
+			MicrophoneDeviceOutput *owner = output->owner;
+			if (output->recievers.size() == 0) {
+				if (owner == NULL) {
+					if (output->active == true) {
+						capture_device_stop(output->name);
+						output->active == false;
+					}
+				} else {
+					owner->remove_reciever(output);
+					memdelete(output);
+				}
+				output = owner;
+			}
+		}
+
+		if (microphone_device_output_map.has(p_device_name)) {
+
+			Map<StringName, MicrophoneDeviceOutput *>::Element *e = microphone_device_output_map.find(p_device_name);
+			MicrophoneDeviceOutput *new_output = e->get();
+			new_output->add_reciever(default_microphone_device_output);
+			if (new_output->active == false) {
+				capture_device_start(p_device_name);
+				new_output->active = true;
+			}
+		}
+
+		output = default_microphone_device_output->owner;
+	}
+}
+
 double AudioDriver::get_mix_time() const {
 
 	double total = (OS::get_singleton()->get_ticks_usec() - _last_mix_time) / 1000000.0;
@@ -101,6 +138,74 @@ int AudioDriver::get_total_channels_by_speaker_mode(AudioDriver::SpeakerMode p_m
 	ERR_FAIL_V(2);
 }
 
+AudioDriver::MicrophoneReciever *AudioDriver::create_microphone_reciever(const StringName &p_device_name) {
+
+	MicrophoneReciever *microphone_reciever = NULL;
+	MicrophoneDeviceOutput *reciever_output = NULL;
+	MicrophoneDeviceOutput *device_output = NULL;
+
+	StringName device_name = capture_device_get_default_name();
+
+	if (microphone_device_output_map.has(device_name)) {
+
+		Map<StringName, MicrophoneDeviceOutput *>::Element *e = microphone_device_output_map.find(device_name);
+		device_output = e->get();
+	}
+
+	if (device_output) {
+		if (p_device_name == "") {
+			if (default_microphone_device_output != NULL) {
+				reciever_output = default_microphone_device_output;
+			} else {
+				// Default reciever does not exist, create it and connect it
+				default_microphone_device_output = memnew(MicrophoneDeviceOutputIndirect);
+				reciever_output = default_microphone_device_output;
+				device_output->add_reciever(reciever_output);
+			}
+		} else {
+			if (microphone_device_output_map.has(p_device_name)) {
+				reciever_output = device_output;
+			}
+		}
+
+		if (reciever_output) {
+			microphone_reciever = memnew(MicrophoneReciever);
+			reciever_output->add_reciever(microphone_reciever);
+			if (device_output->active == false) {
+				capture_device_start(device_name);
+				device_output->active = true;
+			}
+		}
+	}
+
+	return microphone_reciever;
+}
+
+void AudioDriver::destroy_microphone_reciever(AudioDriver::MicrophoneReciever *p_microphone_reciever) {
+
+	if (p_microphone_reciever != NULL) {
+		MicrophoneDeviceOutput *output = p_microphone_reciever->owner;
+		output->remove_reciever(p_microphone_reciever);
+
+		while (output != NULL) {
+			MicrophoneDeviceOutput *owner = output->owner;
+			if (output->recievers.size() == 0) {
+				if (owner == NULL) {
+					if (output->active == true) {
+						capture_device_stop(output->name);
+						output->active == false;
+					}
+				} else {
+					owner->remove_reciever(output);
+					memdelete(output);
+				}
+				output = owner;
+			}
+		}
+		memdelete(p_microphone_reciever);
+	}
+}
+
 Array AudioDriver::get_device_list() {
 	Array list;
 
@@ -118,6 +223,8 @@ AudioDriver::AudioDriver() {
 	_last_mix_time = 0;
 	_mix_amount = 0;
 
+	default_microphone_device_output = NULL;
+
 #ifdef DEBUG_ENABLED
 	prof_time = 0;
 #endif
@@ -1201,6 +1308,34 @@ void AudioServer::set_device(String device) {
 	AudioDriver::get_singleton()->set_device(device);
 }
 
+PoolStringArray AudioServer::audio_in_get_device_names() {
+
+	lock();
+	PoolStringArray device_names = AudioDriver::get_singleton()->capture_device_get_names();
+	unlock();
+
+	return device_names;
+}
+
+AudioDriver::MicrophoneReciever *AudioServer::create_microphone_reciever(const StringName &p_device_name) {
+	AudioDriver::MicrophoneReciever *microphone_reciever = NULL;
+
+	lock();
+	microphone_reciever = AudioDriver::get_singleton()->create_microphone_reciever(p_device_name);
+	unlock();
+
+	return microphone_reciever;
+}
+
+void AudioServer::destroy_microphone_reciever(AudioDriver::MicrophoneReciever *p_microphone_reciever) {
+	lock();
+	AudioDriver::get_singleton()->destroy_microphone_reciever(p_microphone_reciever);
+	unlock();
+}
+
+void AudioServer::_change_default_device(StringName p_recording_device_default_name) {
+}
+
 void AudioServer::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("set_bus_count", "amount"), &AudioServer::set_bus_count);

servers/audio_server.h

@@ -38,6 +38,8 @@
 #include "variant.h"
 
 class AudioDriverDummy;
+class AudioStream;
+class AudioStreamSample;
 
 class AudioDriver {
 
@@ -53,6 +55,7 @@ class AudioDriver {
 protected:
 	void audio_server_process(int p_frames, int32_t *p_buffer, bool p_update_mix_time = true);
 	void update_mix_time(int p_frames);
+	void update_microphone_default(StringName p_device_name);
 
 #ifdef DEBUG_ENABLED
 	_FORCE_INLINE_ void start_counting_ticks() { prof_ticks = OS::get_singleton()->get_ticks_usec(); }
@@ -65,6 +68,121 @@ protected:
 public:
 	double get_mix_time() const; //useful for video -> audio sync
 
+	class MicrophoneDeviceOutput;
+
+	class MicrophoneReciever {
+	public:
+		MicrophoneDeviceOutput *owner;
+
+		MicrophoneReciever() {
+			owner = NULL;
+		}
+
+		~MicrophoneReciever() {
+		}
+	};
+
+	class MicrophoneDeviceOutput : public MicrophoneReciever {
+	public:
+		StringName name;
+		bool active;
+		Vector<MicrophoneReciever *> recievers;
+
+		virtual unsigned int get_mix_rate() = 0;
+		virtual Vector<AudioFrame> &get_buffer() = 0;
+		virtual int get_read_index() = 0;
+		virtual void set_read_index(int p_temp_index) = 0;
+
+		void add_reciever(MicrophoneReciever *p_reciever) {
+			if (p_reciever == NULL) {
+				ERR_PRINT("Attempted to add NULL reciever")
+				return;
+			}
+			if (recievers.find(p_reciever) == -1) {
+				recievers.push_back(p_reciever);
+				p_reciever->owner = this;
+			} else {
+				ERR_PRINT("Duplicate reciever added")
+			}
+		}
+
+		void remove_reciever(MicrophoneReciever *p_reciever) {
+			if (p_reciever == NULL) {
+				ERR_PRINT("Attempted to remove NULL reciever")
+				return;
+			}
+
+			int index = recievers.find(p_reciever);
+
+			if (index != -1) {
+				recievers.remove(index);
+				p_reciever->owner = NULL;
+			} else {
+				ERR_PRINT("Attempted to remove invalid reciever")
+			}
+		}
+	};
+
+	class MicrophoneDeviceOutputDirect : public MicrophoneDeviceOutput {
+	public:
+		enum MicrophoneFormat {
+			FORMAT_FLOAT,
+			FORMAT_PCM
+		};
+
+		MicrophoneFormat microphone_format;
+		unsigned short bits_per_sample;
+		unsigned int channels;
+		unsigned int mix_rate;
+		unsigned short frame_size;
+		int read_index = -2048;
+
+		unsigned int current_capture_index;
+		Vector<AudioFrame> buffer;
+
+		unsigned int get_mix_rate() {
+			return mix_rate;
+		};
+
+		Vector<AudioFrame> &get_buffer() {
+			return buffer;
+		};
+
+		int get_read_index() {
+			return read_index;
+		}
+
+		void set_read_index(int p_read_index) {
+			read_index = p_read_index;
+		}
+	};
+
+	class MicrophoneDeviceOutputIndirect : public MicrophoneDeviceOutput {
+	public:
+		unsigned int get_mix_rate() {
+			return owner->get_mix_rate();
+		};
+
+		Vector<AudioFrame> &get_buffer() {
+			return owner->get_buffer();
+		};
+
+		int get_read_index() {
+			return owner->get_read_index();
+		}
+
+		void set_read_index(int p_read_index) {
+			owner->set_read_index(p_read_index);
+		}
+	};
+
+	MicrophoneDeviceOutputIndirect *default_microphone_device_output;
+
+	Vector<MicrophoneDeviceOutput *> microphone_device_outputs;
+	Map<StringName, MicrophoneDeviceOutput *> microphone_device_output_map;
+
+	Vector<MicrophoneReciever *> direct_recievers;
+
 	enum SpeakerMode {
 		SPEAKER_MODE_STEREO,
 		SPEAKER_SURROUND_31,
@@ -91,11 +209,19 @@ public:
 	virtual void unlock() = 0;
 	virtual void finish() = 0;
 
+	virtual bool capture_device_start(StringName p_name) = 0;
+	virtual bool capture_device_stop(StringName p_name) = 0;
+	virtual PoolStringArray capture_device_get_names() = 0;
+	virtual StringName capture_device_get_default_name() = 0;
+
 	virtual float get_latency() { return 0; }
 
 	SpeakerMode get_speaker_mode_by_total_channels(int p_channels) const;
 	int get_total_channels_by_speaker_mode(SpeakerMode) const;
 
+	AudioDriver::MicrophoneReciever *create_microphone_reciever(const StringName &p_device_name);
+	void destroy_microphone_reciever(AudioDriver::MicrophoneReciever *p_microphone_reciever);
+
 #ifdef DEBUG_ENABLED
 	uint64_t get_profiling_time() const { return prof_time; }
 	void reset_profiling_time() { prof_time = 0; }
@@ -222,6 +348,18 @@ private:
 
 	void _mix_step();
 
+#if 0
+	struct AudioInBlock {
+
+		Ref<AudioStreamSample> audio_stream;
+		int current_position;
+		bool loops;
+	};
+
+	Map<StringName, AudioInBlock *> audio_in_block_map;
+	Vector<AudioInBlock *> audio_in_blocks;
+#endif
+
 	struct CallbackItem {
 
 		AudioCallback callback;
@@ -236,6 +374,7 @@ private:
 
 	friend class AudioDriver;
 	void _driver_process(int p_frames, int32_t *p_buffer);
+	void _change_default_device(StringName p_recording_device_default_name);
 
 protected:
 	static void _bind_methods();
@@ -335,8 +474,12 @@ public:
 	String get_device();
 	void set_device(String device);
 
-	float get_output_latency() { return output_latency; }
+	AudioDriver::MicrophoneReciever *create_microphone_reciever(const StringName &p_device_name);
+	void destroy_microphone_reciever(AudioDriver::MicrophoneReciever *p_microphone_reciever);
+
+	PoolStringArray audio_in_get_device_names();
 
+	float get_output_latency() { return output_latency; }
 	AudioServer();
 	virtual ~AudioServer();
 };

servers/register_server_types.cpp

@@ -104,6 +104,7 @@ void register_server_types() {
 
 	ClassDB::register_virtual_class<AudioStream>();
 	ClassDB::register_virtual_class<AudioStreamPlayback>();
+	ClassDB::register_class<AudioStreamMicrophone>();
 	ClassDB::register_class<AudioStreamRandomPitch>();
 	ClassDB::register_virtual_class<AudioEffect>();
 	ClassDB::register_class<AudioEffectEQ>();