Esempio n. 1
0
        /// <summary>
        /// Returns a list of the system's enabled audio input devices. Returns null if no enabled audio input devices are present. See also: Player.AudioInput.DeviceCount and Player.AudioInput.GetDefaultDevice.
        /// </summary>
        public AudioInputDevice[] GetDevices()
        {
            AudioInputDevice[] audioDevices = null;
            _base._lastError = HResult.MF_E_NO_AUDIO_RECORDING_DEVICE;

            IMMDeviceEnumerator deviceEnumerator = (IMMDeviceEnumerator) new MMDeviceEnumerator();

            deviceEnumerator.EnumAudioEndpoints(EDataFlow.eCapture, (uint)DeviceState.Active, out IMMDeviceCollection deviceCollection);
            Marshal.ReleaseComObject(deviceEnumerator);

            if (deviceCollection != null)
            {
                deviceCollection.GetCount(out uint count);
                if (count > 0)
                {
                    audioDevices = new AudioInputDevice[count];
                    for (int i = 0; i < count; i++)
                    {
                        audioDevices[i] = new AudioInputDevice();

                        deviceCollection.Item((uint)i, out IMMDevice device);
                        Player.GetDeviceInfo(device, audioDevices[i]);

                        Marshal.ReleaseComObject(device);
                    }
                    _base._lastError = Player.NO_ERROR;
                }
                Marshal.ReleaseComObject(deviceCollection);
            }
            return(audioDevices);
        }
Esempio n. 2
0
        // ******************************** Audio Devices - Audio Input Peak Meter - Open / Close / GetValues

        #region  Audio Devices - Audio Input Peak Meter - Open / Close / GetValues

        internal bool InputMeter_Open(AudioInputDevice device, bool change)
        {
            // tested for null at event subscription

            if (!pm_HasInputMeter || change)
            {
                IMMDeviceEnumerator deviceEnumerator = null;
                IMMDevice           levelDevice      = null;

                if (pm_HasInputMeter)
                {
                    InputMeter_Close();
                }

                try
                {
                    deviceEnumerator = (IMMDeviceEnumerator) new MMDeviceEnumerator();
                    deviceEnumerator.GetDevice(device._id, out levelDevice);

                    if (levelDevice != null)
                    {
                        levelDevice.Activate(ref IID_IAudioMeterInformation, 3, IntPtr.Zero, out object levelDeviceInfo);
                        pm_InputMeterInfo = (IAudioMeterInformation)levelDeviceInfo;

                        pm_InputMeterInfo.GetMeteringChannelCount(out pm_InputMeterChannelCount);
                        if (pm_InputMeterChannelCount > MAX_AUDIO_CHANNELS)
                        {
                            pm_InputMeterChannelCount = MAX_AUDIO_CHANNELS;
                        }

                        if (pm_InputMeterValues == null)
                        {
                            pm_InputMeterValues     = new float[MAX_AUDIO_CHANNELS];
                            pm_InputMeterValuesStop = new float[MAX_AUDIO_CHANNELS];
                            for (int i = 0; i < MAX_AUDIO_CHANNELS; i++)
                            {
                                pm_InputMeterValuesStop[i] = STOP_VALUE;
                            }
                        }
                        pm_HasInputMeter = true;

                        //StartSystemDevicesChangedHandlerCheck();
                    }
                }
                catch
                { /* ignore */
                }

                if (levelDevice != null)
                {
                    Marshal.ReleaseComObject(levelDevice);
                }
                if (deviceEnumerator != null)
                {
                    Marshal.ReleaseComObject(deviceEnumerator);
                }
            }
            return(pm_HasInputMeter);
        }
Esempio n. 3
0
        /// <summary>
        /// Returns the system's default audio input device. Returns null if no default audio input device is present. See also: Player.AudioInput.GetDevices.
        /// </summary>
        public AudioInputDevice GetDefaultDevice()
        {
            AudioInputDevice audioDevice = null;

            IMMDeviceEnumerator deviceEnumerator = (IMMDeviceEnumerator) new MMDeviceEnumerator();

            deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out IMMDevice device);
            Marshal.ReleaseComObject(deviceEnumerator);

            if (device != null)
            {
                audioDevice = new AudioInputDevice();
                Player.GetDeviceInfo(device, audioDevice);

                Marshal.ReleaseComObject(device);
                _base._lastError = Player.NO_ERROR;
            }
            else
            {
                _base._lastError = HResult.MF_E_NO_AUDIO_RECORDING_DEVICE;
            }

            return(audioDevice);
        }