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audio.cc
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audio.cc
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#include <stdio.h>
#include <windows.h>
#include <mmdeviceapi.h>
#include <endpointvolume.h>
#include <math.h>
#include <node.h>
using v8::FunctionCallbackInfo;
using v8::Isolate;
using v8::Local;
using v8::Integer;
using v8::Object;
using v8::Value;
IAudioEndpointVolume* getVolume(int mic){
HRESULT hr;
IMMDeviceEnumerator *enumerator = NULL;
IAudioEndpointVolume *volume = NULL;
IMMDevice *defaultDevice = NULL;
CoInitialize(NULL);
hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_INPROC_SERVER, __uuidof(IMMDeviceEnumerator), (LPVOID *) &enumerator);
hr = enumerator->GetDefaultAudioEndpoint(mic ? eCapture : eRender, eConsole, &defaultDevice);
if (hr != 0) {
return volume;
}
hr = defaultDevice->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC_SERVER, NULL, (LPVOID *) &volume);
enumerator->Release();
defaultDevice->Release();
CoUninitialize();
return volume;
}
void get(const FunctionCallbackInfo<Value>& args) {
float volume = 0;
int mic = (int) args[0]->IntegerValue();
IAudioEndpointVolume *temp_volume = NULL;
temp_volume = getVolume(mic);
if (temp_volume == NULL) {
args.GetReturnValue().Set(v8::Integer::New(args.GetIsolate(), -999));
return;
}
temp_volume->GetMasterVolumeLevelScalar(&volume);
temp_volume->Release();
int value = (int) round(volume*100);
args.GetReturnValue().Set(v8::Integer::New(args.GetIsolate(), value));
}
void isMute(const FunctionCallbackInfo<Value>& args) {
int mute = 0;
int mic = (int) args[0]->IntegerValue();
IAudioEndpointVolume *temp_volume = NULL;
temp_volume = getVolume(mic);
if (temp_volume == NULL) {
args.GetReturnValue().Set(v8::Integer::New(args.GetIsolate(), -999));
return;
}
temp_volume->GetMute(&mute);
temp_volume->Release();
args.GetReturnValue().Set(v8::Integer::New(args.GetIsolate(), mute));
}
void mute(const FunctionCallbackInfo<Value>& args) {
int mic = (int) args[0]->IntegerValue();
int mute = (int) args[1]->IntegerValue();
IAudioEndpointVolume *temp_volume = NULL;
temp_volume = getVolume(mic);
if (temp_volume == NULL) {
return;
}
temp_volume->SetMute(mute, NULL);
temp_volume->Release();
}
void set(const FunctionCallbackInfo<Value>& args) {
float newVolume = (float) args[0]->IntegerValue()/100.0f;
int mic = (int) args[1]->IntegerValue();
IAudioEndpointVolume *temp_volume = NULL;
temp_volume = getVolume(mic);
if (temp_volume == NULL) {
return;
}
temp_volume->SetMasterVolumeLevelScalar(newVolume, NULL);
temp_volume->Release();
}
void init(Local<Object> exports) {
NODE_SET_METHOD(exports, "get", get);
NODE_SET_METHOD(exports, "set", set);
NODE_SET_METHOD(exports, "mute", mute);
NODE_SET_METHOD(exports, "isMute", isMute);
}
NODE_MODULE(addon, init)