/// <summary>
/// Updates the meters.
/// </summary>
private void UpdateMeters()
{
if (m_audioRecorder.Recording)
{
m_audioRecorder.UpdateMeters();
var normalizedValue = Math.Pow(10, m_audioRecorder.AveragePower(0) / 20);
mMusicFlowView.WaveColor = RecordingTintColor;
mMusicFlowView.UpdateWithLevel((nfloat)normalizedValue);
this.NavigationItem.Title = NSStringExtensions.TimeStringForTimeInterval(m_audioRecorder.currentTime);
}
else if (m_audioPlayer != null && m_audioPlayer.Playing)
{
m_audioPlayer.UpdateMeters();
var normalizedValue = Math.Pow(10, m_audioPlayer.AveragePower(0) / 20);
mMusicFlowView.WaveColor = PlayingTintColor;
mMusicFlowView.UpdateWithLevel((nfloat)normalizedValue);
}
else
{
mMusicFlowView.WaveColor = NormalTintColor;
mMusicFlowView.UpdateWithLevel(0);
}
}
/// <summary>
/// Updates the play progress.
/// </summary>
private void UpdatePlayProgress()
{
m_labelCurrentTime.Text = NSStringExtensions.TimeStringForTimeInterval(m_audioPlayer.CurrentTime);
m_labelRemainingTime.Text = NSStringExtensions.TimeStringForTimeInterval((m_ShouldShowRemainingTime) ? (m_audioPlayer.Duration - m_audioPlayer.CurrentTime) : m_audioPlayer.Duration);
m_playerSlider.SetValue((float)m_audioPlayer.CurrentTime, true);
}
/// <summary>
/// Plaies the action.
/// </summary>
/// <param name="item">Item.</param>
/// <param name="args">Arguments.</param>
private void PlayAction(object item, EventArgs args)
{
m_oldSessionCategory = AVAudioSession.SharedInstance().Category;
AVAudioSession.SharedInstance().SetCategory(AVAudioSessionCategory.Playback);
//
m_audioPlayer = AVAudioPlayer.FromUrl(NSUrl.FromFilename(m_recordingFilePath));
m_audioPlayer.WeakDelegate = this;
m_audioPlayer.MeteringEnabled = true;
m_audioPlayer.PrepareToPlay();
m_audioPlayer.Play();
//UI Update
{
this.SetToolbarItems(new UIBarButtonItem[] { m_pauseButton, m_flexItem1, m_recordButton, m_flexItem2, m_trashButton }, true);
this.ShowNavigationButton(false);
m_recordButton.Enabled = false;
m_trashButton.Enabled = false;
}
//Start regular update
{
m_playerSlider.Value = (float)m_audioPlayer.CurrentTime;
m_playerSlider.MaxValue = (float)m_audioPlayer.Duration;
m_viewPlayerDuration.Frame = this.NavigationController.NavigationBar.Bounds;
m_labelCurrentTime.Text = NSStringExtensions.TimeStringForTimeInterval(m_audioPlayer.CurrentTime);
m_labelRemainingTime.Text = NSStringExtensions.TimeStringForTimeInterval((m_ShouldShowRemainingTime) ? (m_audioPlayer.Duration - m_audioPlayer.CurrentTime): m_audioPlayer.Duration);
m_viewPlayerDuration.SetNeedsLayout();
m_viewPlayerDuration.LayoutIfNeeded();
this.NavigationItem.TitleView = m_viewPlayerDuration;
if (mplayProgressDisplayLink != null)
{
mplayProgressDisplayLink.Invalidate();
}
mplayProgressDisplayLink = CADisplayLink.Create(UpdatePlayProgress);
mplayProgressDisplayLink.AddToRunLoop(NSRunLoop.Current, NSRunLoopMode.Common);
}
}
/// <summary>
/// Views the did load.
/// </summary>
public override void ViewDidLoad()
{
base.ViewDidLoad();
//
m_navigationTitle = @"Audio Recorder";
//
this.View.TintColor = NormalTintColor;
mMusicFlowView.BackgroundColor = this.View.BackgroundColor;
mMusicFlowView.IdleAmplitude = 0;
//Unique recording URL
var fileName = NSProcessInfo.ProcessInfo.GloballyUniqueString;
var documents = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
var tmp = Path.Combine(documents, "..", "tmp");
m_recordingFilePath = Path.Combine(tmp, String.Format("{0}.m4a", fileName));
{
m_flexItem1 = new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace, null, null);
m_flexItem2 = new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace, null, null);
var img = UIImage.FromBundle("audio_record");
m_recordButton = new UIBarButtonItem(img, UIBarButtonItemStyle.Plain, RecordingButtonAction);
m_playButton = new UIBarButtonItem(UIBarButtonSystemItem.Play, PlayAction);
m_pauseButton = new UIBarButtonItem(UIBarButtonSystemItem.Pause, PauseAction);
m_trashButton = new UIBarButtonItem(UIBarButtonSystemItem.Trash, DeleteAction);
this.SetToolbarItems(new UIBarButtonItem[] { m_playButton, m_flexItem1, m_recordButton, m_flexItem2, m_trashButton }, false);
m_playButton.Enabled = false;
m_trashButton.Enabled = false;
}
// Define the recorder setting
{
var audioSettings = new AudioSettings()
{
Format = AudioFormatType.MPEG4AAC,
SampleRate = 44100.0f,
NumberChannels = 2,
};
NSError err = null;
m_audioRecorder = AVAudioRecorder.Create(NSUrl.FromFilename(m_recordingFilePath), audioSettings, out err);
// Initiate and prepare the recorder
m_audioRecorder.WeakDelegate = this;
m_audioRecorder.MeteringEnabled = true;
mMusicFlowView.PrimaryWaveLineWidth = 3.0f;
mMusicFlowView.SecondaryWaveLineWidth = 1.0f;
}
//Navigation Bar Settings
{
this.NavigationItem.Title = @"Audio Recorder";
m_cancelButton = new UIBarButtonItem(UIBarButtonSystemItem.Cancel, CancelAction);
this.NavigationItem.LeftBarButtonItem = m_cancelButton;
m_doneButton = new UIBarButtonItem(UIBarButtonSystemItem.Done, DoneAction);
}
//Player Duration View
{
m_viewPlayerDuration = new UIView();
m_viewPlayerDuration.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
m_viewPlayerDuration.BackgroundColor = UIColor.Clear;
m_labelCurrentTime = new UILabel();
m_labelCurrentTime.Text = NSStringExtensions.TimeStringForTimeInterval(0);
m_labelCurrentTime.Font = UIFont.BoldSystemFontOfSize(14.0f);
m_labelCurrentTime.TextColor = NormalTintColor;
m_labelCurrentTime.TranslatesAutoresizingMaskIntoConstraints = false;
m_playerSlider = new UISlider(new CGRect(0, 0, this.View.Bounds.Size.Width, 64));
m_playerSlider.MinimumTrackTintColor = PlayingTintColor;
m_playerSlider.Value = 0;
m_playerSlider.TouchDown += SliderStart;
m_playerSlider.ValueChanged += SliderMoved;
m_playerSlider.TouchUpInside += SliderEnd;
m_playerSlider.TouchUpOutside += SliderEnd;
m_playerSlider.TranslatesAutoresizingMaskIntoConstraints = false;
m_labelRemainingTime = new UILabel();
m_labelCurrentTime.Text = NSStringExtensions.TimeStringForTimeInterval(0);
m_labelRemainingTime.UserInteractionEnabled = true;
m_labelRemainingTime.AddGestureRecognizer(new UITapGestureRecognizer(TapRecognizer));
m_labelRemainingTime.Font = m_labelCurrentTime.Font;
m_labelRemainingTime.TextColor = m_labelCurrentTime.TextColor;
m_labelRemainingTime.TranslatesAutoresizingMaskIntoConstraints = false;
m_viewPlayerDuration.Add(m_labelCurrentTime);
m_viewPlayerDuration.Add(m_playerSlider);
m_viewPlayerDuration.Add(m_labelRemainingTime);
NSLayoutConstraint constraintCurrentTimeLeading = NSLayoutConstraint.Create(m_labelCurrentTime, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, m_viewPlayerDuration, NSLayoutAttribute.Leading, 1.0f, 10.0f);
NSLayoutConstraint constraintCurrentTimeTrailing = NSLayoutConstraint.Create(m_playerSlider, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, m_labelCurrentTime, NSLayoutAttribute.Trailing, 1.0f, 10);
NSLayoutConstraint constraintRemainingTimeLeading = NSLayoutConstraint.Create(m_labelRemainingTime, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, m_playerSlider, NSLayoutAttribute.Trailing, 1.0f, 10.0f);
NSLayoutConstraint constraintRemainingTimeTrailing = NSLayoutConstraint.Create(m_viewPlayerDuration, NSLayoutAttribute.Trailing, NSLayoutRelation.Equal, m_labelRemainingTime, NSLayoutAttribute.Trailing, 1.0f, 10.0f);
NSLayoutConstraint constraintCurrentTimeCenter = NSLayoutConstraint.Create(m_labelCurrentTime, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, m_viewPlayerDuration, NSLayoutAttribute.CenterY, 1.0f, 0.0f);
NSLayoutConstraint constraintSliderCenter = NSLayoutConstraint.Create(m_playerSlider, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, m_viewPlayerDuration, NSLayoutAttribute.CenterY, 1.0f, 0.0f);
NSLayoutConstraint constraintRemainingTimeCenter = NSLayoutConstraint.Create(m_labelRemainingTime, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, m_viewPlayerDuration, NSLayoutAttribute.CenterY, 1.0f, 0.0f);
m_viewPlayerDuration.AddConstraints(new NSLayoutConstraint[] { constraintCurrentTimeLeading, constraintCurrentTimeTrailing, constraintRemainingTimeLeading, constraintRemainingTimeTrailing, constraintCurrentTimeCenter, constraintSliderCenter, constraintRemainingTimeCenter });
}
}