private void output_FramePlayingStarted(object sender, PlayFrameEventArgs e)
{
updateTrackbar(e.FrameIndex);
if (e.FrameIndex + e.Count < decoder.Frames)
{
int previous = decoder.Position;
decoder.Seek(e.FrameIndex);
Signal s = decoder.Decode(e.Count);
decoder.Seek(previous);
updateWaveform(s.ToFloat(), s.Length);
}
}
/// <summary>
/// Plays the recorded audio stream.
/// </summary>
///
private void btnPlay_Click(object sender, EventArgs e)
{
// First, we rewind the stream
stream.Seek(0, SeekOrigin.Begin);
// Then we create a decoder for it
decoder = new WaveDecoder(stream);
// Configure the track bar so the cursor
// can show the proper current position
if (trackBar1.Value < decoder.Frames)
{
decoder.Seek(trackBar1.Value);
}
trackBar1.Maximum = decoder.Samples;
// Here we can create the output audio device that will be playing the recording
output = new AudioOutputDevice(this.Handle, decoder.SampleRate, decoder.Channels);
// Wire up some events
output.FramePlayingStarted += output_FramePlayingStarted;
output.NewFrameRequested += output_NewFrameRequested;
output.Stopped += output_PlayingFinished;
// Start playing!
output.Play();
updateButtons();
}
/// <summary>
/// Plays the recorded audio stream.
/// 播放录制的音频流。
/// </summary>
///
private void BtnPlay_Click(object sender, EventArgs e)
{
// First, we rewind the stream
//【1】首先，我们拨回初始值
stream.Seek(0, SeekOrigin.Begin);
// Then we create a decoder for it
//【2】然后我们为它创建一个解码器
decoder = new WaveDecoder(stream);
/*Configure the track bar so the cursorcan show the proper current position
*【3】 配置跟踪条，使光标可以显示正确的当前位置
*/
if (trackBar1.Value < decoder.Frames)
{
decoder.Seek(trackBar1.Value);
}
trackBar1.Maximum = decoder.Samples;
// Here we can create the output audio device that will be playing the recording
//【4】在这里我们可以创建将播放录音的输出音频设备
output = new AudioOutputDevice(this.Handle, decoder.SampleRate, decoder.Channels);
// 【5】Wire up some events 注册一些事件
//【5.1】指示帧块已开始执行事件。
output.FramePlayingStarted += output_FramePlayingStarted;
output.NewFrameRequested += output_NewFrameRequested;
output.Stopped += output_PlayingFinished;
// Start playing!
output.Play();
updateButtons();
}
private void btnPlay_Click(object sender, EventArgs e)
{
stream.Seek(0, SeekOrigin.Begin);
decoder = new WaveDecoder(stream);
if (trackBar1.Value < decoder.Frames)
{
decoder.Seek(trackBar1.Value);
}
trackBar1.Maximum = decoder.Samples;
output = new AudioOutputDevice(this.Handle, decoder.SampleRate, decoder.Channels);
output.NewFrameRequested += new EventHandler <NewFrameRequestedEventArgs>(output_NewFrameRequested);
output.Stopped += new EventHandler(output_PlayingFinished);
output.FramePlayingStarted += new EventHandler <PlayFrameEventArgs>(output_FramePlayingStarted);
output.Play();
updateButtons();
}
