77 lines
3.3 KiB
C#
77 lines
3.3 KiB
C#
// -----------------------------------------
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// SoundScribe (TM) and related software.
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//
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// Copyright (C) 2007-2011 Vannatech
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// http://www.vannatech.com
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// All rights reserved.
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//
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// This source code is subject to the MIT License.
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// http://www.opensource.org/licenses/mit-license.php
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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// -----------------------------------------
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// milligan22963 - ported to nAudio
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// -----------------------------------------
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using System;
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using System.Runtime.InteropServices;
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namespace NAudio.CoreAudioApi.Interfaces
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{
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/// <summary>
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/// Windows CoreAudio ISimpleAudioVolume interface
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/// Defined in AudioClient.h
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/// </summary>
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[Guid("87CE5498-68D6-44E5-9215-6DA47EF883D8"),
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InterfaceType(ComInterfaceType.InterfaceIsIUnknown),
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ComImport]
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internal interface ISimpleAudioVolume
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{
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/// <summary>
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/// Sets the master volume level for the audio session.
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/// </summary>
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/// <param name="levelNorm">The new volume level expressed as a normalized value between 0.0 and 1.0.</param>
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/// <param name="eventContext">A user context value that is passed to the notification callback.</param>
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/// <returns>An HRESULT code indicating whether the operation succeeded of failed.</returns>
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[PreserveSig]
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int SetMasterVolume(
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[In] [MarshalAs(UnmanagedType.R4)] float levelNorm,
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[In] [MarshalAs(UnmanagedType.LPStruct)] Guid eventContext);
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/// <summary>
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/// Retrieves the client volume level for the audio session.
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/// </summary>
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/// <param name="levelNorm">Receives the volume level expressed as a normalized value between 0.0 and 1.0. </param>
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/// <returns>An HRESULT code indicating whether the operation succeeded of failed.</returns>
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[PreserveSig]
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int GetMasterVolume(
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[Out] [MarshalAs(UnmanagedType.R4)] out float levelNorm);
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/// <summary>
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/// Sets the muting state for the audio session.
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/// </summary>
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/// <param name="isMuted">The new muting state.</param>
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/// <param name="eventContext">A user context value that is passed to the notification callback.</param>
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/// <returns>An HRESULT code indicating whether the operation succeeded of failed.</returns>
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[PreserveSig]
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int SetMute(
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[In] [MarshalAs(UnmanagedType.Bool)] bool isMuted,
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[In] [MarshalAs(UnmanagedType.LPStruct)] Guid eventContext);
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/// <summary>
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/// Retrieves the current muting state for the audio session.
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/// </summary>
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/// <param name="isMuted">Receives the muting state.</param>
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/// <returns>An HRESULT code indicating whether the operation succeeded of failed.</returns>
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[PreserveSig]
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int GetMute(
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[Out] [MarshalAs(UnmanagedType.Bool)] out bool isMuted);
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}
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}
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