public MainPage()
{
InitializeComponent();
// Create new Microphone and set event handler
microphone = Microphone.Default;
microphone.BufferReady += OnMicrophoneBufferReady;
// Create new DynamicSoundEffectInstace for playback
playback = new DynamicSoundEffectInstance(microphone.SampleRate, AudioChannels.Mono);
playback.BufferNeeded += OnPlaybackBufferNeeded;
// Enumerate existing memo waveform files in isolated storage
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
{
// Show filenames with most recent first
string[] filenames = storage.GetFileNames();
Array.Sort(filenames);
Array.Reverse(filenames);
foreach (string filename in filenames)
{
using (IsolatedStorageFileStream stream = storage.OpenFile(filename, FileMode.Open, FileAccess.Read))
{
TimeSpan duration = microphone.GetSampleDuration((int)stream.Length);
MemoInfo memoInfo = new MemoInfo(filename, stream.Length, duration);
memoFiles.Add(memoInfo);
}
}
}
// Set memo collection to ListBox
memosListBox.ItemsSource = memoFiles;
// Set-up record button
recordButton.DataContext = spaceTime;
UpdateRecordButton(false);
}
void StopRecording()
{
// Get the last partial buffer
int sampleSize = microphone.GetSampleSizeInBytes(microphone.BufferDuration);
byte[] extraBuffer = new byte[sampleSize];
int extraBytes = microphone.GetData(extraBuffer);
// Stop recording
microphone.Stop();
// Create MemoInfo object and add at top of collection
int totalSize = memoBufferCollection.Count * sampleSize + extraBytes;
TimeSpan duration = microphone.GetSampleDuration(totalSize);
MemoInfo memoInfo = new MemoInfo(DateTime.UtcNow, totalSize, duration);
memoFiles.Insert(0, memoInfo);
// Save data in isolated storage
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
{
using (IsolatedStorageFileStream stream = storage.CreateFile(memoInfo.FileName))
{
// Write buffers from collection
foreach (byte[] buffer in memoBufferCollection)
stream.Write(buffer, 0, buffer.Length);
// Write partial buffer
stream.Write(extraBuffer, 0, extraBytes);
}
}
// Scroll to show new MemoInfo item
memosListBox.UpdateLayout();
memosListBox.ScrollIntoView(memoInfo);
}