Discussion :

[mvc_dev]

bonjour,
je travail sur une partie d'un projet ou je fais l'enregistrement audio avec silverlight ,
quand l'utilisateur clique sur recorde il y a un minuteur qui se lance aprés il clique sur stop et sur sauvegarder,
tout se passe bien,
ce que je veux c'est de fixé le minuteur pour qu'il s'arrete a 60 s par exemple ,
( j'arrive a le faire ) le souci c'est que meme si il s'arrete et il se fige a 60 s mais l''application continu a enregistré le son en attaendant de cliquer sur le bouton "stop" . et mois je veux synchronisé ça,
cad quand le minuteur ateint 60 s l'enregistrement du son s'arrete aussi .

voici mon code :

Code xml :

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<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:Codeplex_Dashboarding="clr-namespace:Codeplex.Dashboarding;assembly=Codeplex.Dashboarding" x:Class="proj.MainPage"
    mc:Ignorable="d" Background="#FF4F4545" Height="233" Width="641" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk">
 
    <Canvas x:Name="LayoutRoot" Background="#FF191818" Height="285" Width="786">
        <Button   Content="start" Command="{Binding RecordCommand}" x:Name="button1" Width="55" Height="39" Canvas.Left="76" Canvas.Top="95"/>
        <Button Content="Stop" Command="{Binding PlayPauseCommand}"  x:Name="button3" Width="55" Height="39" Canvas.Left="179" Canvas.Top="95"/>
        <Button Content="Save" Command="{Binding SaveCommand}" x:Name="button2" Width="55" Height="39" Canvas.Left="275" Canvas.Top="95"/>
        <TextBlock Text="{Binding StatusText}" x:Name="textBlock1" Foreground="#FF13E3BC" FontSize="12" Height="28" Canvas.Left="76" Canvas.Top="197" Width="557" />
        <TextBlock Height="34" Canvas.Left="415" TextWrapping="Wrap" Text="RECORDER" Canvas.Top="19" Width="200" Foreground="#FFFDFDFD" FontSize="26.667" FontFamily="Rockwell Extra Bold"/>
        <Rectangle Height="93" Canvas.Left="46" Stroke="#FFA39FA4" Canvas.Top="69" Width="552" StrokeThickness="5" RadiusX="10" RadiusY="10"/>
        <Codeplex_Dashboarding:Odometer x:Name="tapeMeter" Height="55" Canvas.Left="408" Canvas.Top="88" Width="164"  FinalValue="0020" InitialValue="0000" Interval="1" Digits="4" />
        <Path Data="M353.5,69 L354.5,162" Height="95" Canvas.Left="355.5" Stretch="Fill" Stroke="#FFA39FA4" StrokeThickness="5" Canvas.Top="67" UseLayoutRounding="False" Width="6"/>
        <sdk:Label Canvas.Left="12" Canvas.Top="248" Height="37" Name="label1" Width="646" Content="Merci de mettre votre nom sur le fichier" AllowDrop="False" FlowDirection="LeftToRight" FontSize="18" FontStretch="Normal" FontStyle="Italic" Foreground="#FFE22A10" HorizontalContentAlignment="Center">
            <sdk:Label.Background>
                <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
                    <GradientStop Color="Black" Offset="0" />
                    <GradientStop Color="#FFDB8181" Offset="1" />
                </LinearGradientBrush>
            </sdk:Label.Background>
            <sdk:Label.BorderBrush>
                <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
                    <GradientStop Color="Black" Offset="0" />
                    <GradientStop Color="#FFBE8686" Offset="1" />
                </LinearGradientBrush>
            </sdk:Label.BorderBrush>
        </sdk:Label>
    </Canvas>
</UserControl>

voici les class que j'utilise :

Code c# :

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using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.IO;
 
namespace proj.Audio
{
    public class WavManager
    {
        public static void SavePcmToWav(Stream rawData, Stream output, AudioFormat audioFormat)
        {
            if (audioFormat.WaveFormat != WaveFormatType.Pcm)
                throw new ArgumentException("Only PCM coding is supported.");
 
            BinaryWriter bwOutput = new BinaryWriter(output);
 
            // Write down the WAV header.
            // Refer to http://technology.niagarac.on.ca/courses/ctec1631/WavFileFormat.html
            // for details on the format.
 
            // Note that we use ToCharArray() when writing fixed strings
            // to force using the char[] overload because
            // Write(string) writes the string prefixed by its length.
 
            // -- RIFF chunk
 
            bwOutput.Write("RIFF".ToCharArray());
 
            // Total Length Of Package To Follow
            // Computed as data length plus the header length without the data
            // we have written so far and this data (44 - 4 ("RIFF") - 4 (this data))
            bwOutput.Write((uint)(rawData.Length + 36));
 
            bwOutput.Write("WAVE".ToCharArray());
 
            // -- FORMAT chunk
 
            bwOutput.Write("fmt ".ToCharArray());
 
            // Length Of FORMAT Chunk (Binary, always 0x10)
            bwOutput.Write((uint)0x10);
 
            // Always 0x01
            bwOutput.Write((ushort)0x01);
 
            // Channel Numbers (Always 0x01=Mono, 0x02=Stereo)
            bwOutput.Write((ushort)audioFormat.Channels);
 
            // Sample Rate (Binary, in Hz)
            bwOutput.Write((uint)audioFormat.SamplesPerSecond);
 
            // Bytes Per Second
            bwOutput.Write((uint)(audioFormat.BitsPerSample * audioFormat.SamplesPerSecond * audioFormat.Channels / 8));
 
            // Bytes Per Sample: 1=8 bit Mono, 2=8 bit Stereo or 16 bit Mono, 4=16 bit Stereo
            bwOutput.Write((ushort)(audioFormat.BitsPerSample * audioFormat.Channels / 8));
 
            // Bits Per Sample
            bwOutput.Write((ushort)audioFormat.BitsPerSample);
 
            // -- DATA chunk
 
            bwOutput.Write("data".ToCharArray());
 
            // Length Of Data To Follow
            bwOutput.Write((uint)rawData.Length);
 
            // Raw PCM data follows...
 
            // Reset position in rawData and remember its origin position
            // to restore at the end.
            long originalRawDataStreamPosition = rawData.Position;
            rawData.Seek(0, SeekOrigin.Begin);
 
            // Append all data from rawData stream into output stream.
            byte[] buffer = new byte[4096];
            int read;       // number of bytes read in one iteration
            while ((read = rawData.Read(buffer, 0, 4096)) > 0)
            {
                bwOutput.Write(buffer, 0, read);
            }
 
            rawData.Seek(originalRawDataStreamPosition, SeekOrigin.Begin);
        }
    }
}

Code c# :

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using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.IO;
 
namespace proj.Audio
{
    public class MemoryAudioSink : AudioSink
    {
        // Memory sink to record into.
        private MemoryStream _stream;
        // Current format the sinks records audio in.
        private AudioFormat _format;
 
        public Stream BackingStream
        {
            get { return _stream; }
        }
 
        public AudioFormat CurrentFormat
        {
            get { return _format; }
        }
 
        protected override void OnCaptureStarted()
        {
            _stream = new MemoryStream(1024);
        }
 
        protected override void OnCaptureStopped()
        {            
        }
 
        protected override void OnFormatChange(AudioFormat audioFormat)
        {
            if (audioFormat.WaveFormat != WaveFormatType.Pcm)
                throw new InvalidOperationException("MemoryAudioSink supports only PCM audio format.");
 
            _format = audioFormat;
        }
 
        protected override void OnSamples(long sampleTime, long sampleDuration, byte[] sampleData)
        {
            // New audio data arrived, write them to the stream.
            _stream.Write(sampleData, 0, sampleData.Length);
        }
    }
}

Code c# :

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using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using proj.Audio;
using System.IO;
using proj;
 
namespace proj
{
    public class SimpleCommand : ICommand
    {
        public Action ExecuteAction { get; set; }
 
        private bool _canExecute;
        public bool MayBeExecuted
        {
            get { return _canExecute; }
            set
            {
                if (_canExecute != value)
                {
                    _canExecute = value;
                    if (CanExecuteChanged != null)
                        CanExecuteChanged(this, new EventArgs());
                }
            }
        }
 
        #region ICommand Members
 
        public bool CanExecute(object parameter)
        {
            return MayBeExecuted;
        }
 
        public event EventHandler CanExecuteChanged;
 
        public void Execute(object parameter)
        {
            if (ExecuteAction != null)
                ExecuteAction();
        }
 
        #endregion
    }
 
    public class RecorderViewModel : DependencyObject
    {
        private SimpleCommand _recordCommand;
        private SimpleCommand _playPauseCommand;
        private SimpleCommand _saveCommand;
 
        private MemoryAudioSink _sink;
        private CaptureSource _captureSource;
        private SaveFileDialog saveFileDialog = new SaveFileDialog() { Filter = "Audio files (*.wav)|*.wav" };
 
        public SimpleCommand RecordCommand { get { return _recordCommand; } }
        public SimpleCommand PlayPauseCommand { get { return _playPauseCommand; } }
        public SimpleCommand SaveCommand { get { return _saveCommand; } }
 
        public static readonly DependencyProperty StatusTextProperty = DependencyProperty.Register("StatusText", typeof(string), typeof(RecorderViewModel), null);
        public string StatusText
        {
            get
            {
                return (string)GetValue(StatusTextProperty);
            }
            set
            {
                SetValue(StatusTextProperty, value);
            }
        }
 
        public RecorderViewModel()
        {
            _recordCommand = new SimpleCommand()
            {
                MayBeExecuted = true,
                ExecuteAction = () => Record()
            };
 
            _saveCommand = new SimpleCommand()
            {
                MayBeExecuted = false,
                ExecuteAction = () => SaveFile()
            };
 
            _playPauseCommand = new SimpleCommand()
            {
                MayBeExecuted = false,
                ExecuteAction = () => PlayOrPause()
            };
 
            var audioDevice = CaptureDeviceConfiguration.GetDefaultAudioCaptureDevice();
            _captureSource = new CaptureSource() { AudioCaptureDevice = audioDevice };
 
            GoToStartState();
        }
 
        private bool EnsureAudioAccess()
        {
            return CaptureDeviceConfiguration.AllowedDeviceAccess || CaptureDeviceConfiguration.RequestDeviceAccess();
        }
 
        protected void GoToStartState()
        {
            StatusText = "prés...";
            _saveCommand.MayBeExecuted = false;
            _recordCommand.MayBeExecuted = true;
            _playPauseCommand.MayBeExecuted = false;
 
 
 
        }
 
        protected void Record()
        {
            if (!EnsureAudioAccess())
                return;
 
            if (_captureSource.State != CaptureState.Stopped)
                return;
 
            _sink = new MemoryAudioSink();
            _sink.CaptureSource = _captureSource;
            _captureSource.Start();
 
            // Enable pause command, disable record command
            _playPauseCommand.MayBeExecuted = true;
            _recordCommand.MayBeExecuted = false;
            StatusText = "enrgistrement encours...( merci de ne pas depassé 20 seconde, sinon ca sera pas pris en compte ";
        }
 
        public void PlayOrPause()
        {
            if (_captureSource.State == CaptureState.Started)
            {
                _captureSource.Stop();
 
                // Disable pause command, enable save command
                _playPauseCommand.MayBeExecuted = false;
                _saveCommand.MayBeExecuted = true;
                StatusText = "enrgesitrement terminer avec succé , merci de sauvegarder.";
            }
        }
 
        protected void SaveFile()
        {
            if (saveFileDialog.ShowDialog() == false)
            {
                return;
            }
 
            StatusText = "encours...";
 
 
            Stream stream = saveFileDialog.OpenFile();
 
            WavManager.SavePcmToWav(_sink.BackingStream, stream, _sink.CurrentFormat);
 
 
            stream.Close();
 
            MessageBox.Show("votre voix est bien enrgistrer sur votre poste, il vous reste qu'a l'Uploader avec le bouton parcourir sur l'autre page.");
 
 
 
 
 
            GoToStartState();
        }
    }
}

merci



Cdt

[mvc_dev]

je viens de tester ça,
mais je sais pourquoi il sort pas de la boucle quand il ateint la taille que j'ai preceisé :

Code :

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  protected void Record()
        {
            while (true)
            {
                if (!EnsureAudioAccess())
                    return;
 
                if (_captureSource.State != CaptureState.Stopped)
                    return;
 
                _sink = new MemoryAudioSink();
                _sink.CaptureSource = _captureSource;
 
 
                _captureSource.Start();
                // while (_sink.BackingStream.Length < 10744860)
 
                _playPauseCommand.MayBeExecuted = true;
                _recordCommand.MayBeExecuted = false;
 
                Int32 tail = Convert.ToInt32(_sink.BackingStream.Length);
 
                Int32 test = tail;
 
                //    long tail = _sink.BackingStream.Length;
 
                // Enable pause command, disable record command
 
                StatusText = "enrgistrement encours...( l'enregistrement s'arretera dans 60 secondes ) ";
 
                if (_sink.BackingStream.Length == 7036)
                {
 
                    PlayOrPause();
                }
 
 
 
            }
        }

[mvc_dev]

je viens de trouvé la solution,

declarer :

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private DispatcherTimer _timer = new DispatcherTimer();

mettez au debut de la metode record

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_timer.Tick += (o, e) => 
{ 
  _timer.Stop(); 
  if (_captureSource.State == CaptureState.Started) 
  { 
    PlayOrPause(); 
  } 
}; 
 
_timer.Interval = new TimeSpan(0, 0, 60); // 60 seconds

demarrer arrete le tick dans chaque methode :

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protected void Record() 
{ 
  // ... 
 
  _timer.Start(); 
} 
 
public void PlayOrPause() 
{ 
  _timer.Stop(); 
 
  // ... 
}

et voila