Ejemplo n.º 1
0
        /// <summary>
        /// method for setting the volume to a specific level
        /// </summary>
        /// <param name="volumeLevel">volume level we wish to set volume to</param>
        public static void SetVolume(int volumeLevel)
        {
            try
            {
                //method level variables
                int currVolume;
                int mixerControl;

                //create a new volume control
                VolumeStructs.Mixer volumeControl = new VolumeStructs.Mixer();

                //open the mixer control
                PCWin32.mixerOpen(out mixerControl, 0, 0, 0, 0);

                //set the type to volume control type
                int controlType = VolumeConstants.MIXERCONTROL_CONTROLTYPE_VOLUME;

                //get the current mixer control and get the current volume
                GetMixer(mixerControl, VolumeConstants.MIXERLINE_COMPONENTTYPE_DST_SPEAKERS, controlType, out volumeControl, out currVolume);

                //now check the volume level. If the volume level
                //is greater than the max then set the volume to
                //the max level. If it's less than the minimum level
                //then set it to the minimun level
                if (volumeLevel > volumeControl.lMaximum)
                {
                    volumeLevel = volumeControl.lMaximum;
                }
                else if (volumeLevel < volumeControl.lMinimum)
                {
                    volumeLevel = volumeControl.lMinimum;
                }

                //set the volume
                SetMixer(mixerControl, volumeControl, volumeLevel);

                //now re-get the mixer control
                GetMixer(mixerControl, VolumeConstants.MIXERLINE_COMPONENTTYPE_DST_SPEAKERS, controlType, out volumeControl, out currVolume);

                //make sure the volume level is equal to the current volume
                if (volumeLevel != currVolume)
                {
                    throw new Exception("Cannot Set Volume");
                }

                //close the mixer control as we are finished with it
                PCWin32.mixerClose(mixerControl);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
Ejemplo n.º 2
0
        /// <summary>
        /// method for retrieving the current volume from the system
        /// </summary>
        /// <returns>int value</returns>
        public static int GetVolume()
        {
            //method level variables
            int currVolume;
            int mixerControl;

            //create a new volume control
            VolumeStructs.Mixer mixer = new VolumeStructs.Mixer();

            //open the mixer
            PCWin32.mixerOpen(out mixerControl, 0, 0, 0, 0);

            //set the type to volume control type
            int type = VolumeConstants.MIXERCONTROL_CONTROLTYPE_VOLUME;

            //get the mixer control and get the current volume level
            GetMixer(mixerControl, VolumeConstants.MIXERLINE_COMPONENTTYPE_DST_SPEAKERS, type, out mixer, out currVolume);

            //close the mixer control since we are now done with it
            PCWin32.mixerClose(mixerControl);

            //return the current volume to the calling method
            return(currVolume);
        }