/// <summary>
///构造
/// </summary>
public Chart_AM()
{
m_aSpectrograms2D_source = null;
m_aSpectrograms2D_signal = null;
m_AreaSpectrum_signal = null;
m_AreaSpectrum_souce = null;
m_aWaveformMonitors = null;
m_iFFTCalcIntervalMs = 20;
m_iFFTWindowLength = 1024 * 4;
m_iHighFreq = 2000;
_samplingFrequency = 0;
Param = new Param_AM(1000);
_seriesNames = new string[]
{
"音频",
"载波",
"调制",
"检波"
};
InitializeComponent();
//销毁时释放资源
Dispatcher.ShutdownStarted += (object sender, EventArgs e) =>
{
Dispose();
};
}
/// <summary>
/// 初始化示波器
/// </summary>
private void InitWaveformMonitors()
{
if (m_aWaveformMonitors != null)
{
DisposeWaveformMonitors();
}
if (m_aWaveformMonitors == null)
{
// Let's disable SizeChanged event handler temporarily.
// ArrangeMonitors method is called at the end of this
// method.
gridChart.SizeChanged -= gridChart_SizeChanged;
m_aWaveformMonitors =
new WaveformMonitor(
gridChart,
_seriesNames,
_samplingFrequency,
DefaultColors.SeriesForBlackBackgroundWpf[0],
null);
m_aWaveformMonitors.Chart.ChartName = "示波器";
gridChart.SizeChanged += gridChart_SizeChanged;
string strTitle = "示波器 (幅值 / 时间)\n"
+ " " + string.Format("采样频率 = {0} kHz",
((double)+_samplingFrequency / 1000.0).ToString("0"));
m_aWaveformMonitors.Initialize(_samplingFrequency, strTitle,
XAxisScrollMode.Scrolling, 0.03125);
}
ArrangeMonitors();
}
/// <summary>
/// 释放示波器
/// </summary>
private void DisposeWaveformMonitors()
{
if (m_aWaveformMonitors != null)
{
m_aWaveformMonitors.Dispose();
m_aWaveformMonitors = null;
}
}
/// <summary>
/// 释放示波器
/// </summary>
private void DisposeWaveformMonitors()
{
if (m_WaveformMonitor != null)
{
m_WaveformMonitor.Dispose();
m_WaveformMonitor = null;
}
if (m_CodeMonitor != null)
{
m_CodeMonitor.Dispose();
m_CodeMonitor = null;
}
}
/// <summary>
/// 停止模拟 释放资源
/// </summary>
public void Dispose()
{
if (audioInput1.Input.IsInputEnabled == true)
{
audioInput1.Input.StopRequest();
}
else
{
gridChart.Children.Clear();
if (m_WaveformMonitor != null)
{
m_WaveformMonitor.Dispose();
m_WaveformMonitor = null;
}
}
}
/// <summary>
/// 构造
/// </summary>
public Chart_PCM()
{
m_WaveformMonitor = null;
m_CodeMonitor = null;
_samplingFrequency = 0;
_seriesNames = new string[]
{
"信号源",
"PCM信号"
};
Param = new Param_PCM(2000);
InitializeComponent();
//销毁时释放资源
Dispatcher.ShutdownStarted += (object sender, EventArgs e) =>
{
Dispose();
};
}
/// <summary>
/// 初始化示波器
/// </summary>
private void InitWaveformMonitors()
{
if (m_WaveformMonitor != null || m_CodeMonitor != null)
{
DisposeWaveformMonitors();
}
if (m_WaveformMonitor == null)
{
// Let's disable SizeChanged event handler temporarily.
// ArrangeMonitors method is called at the end of this
// method.
gridChart.SizeChanged -= gridChart_SizeChanged;
m_WaveformMonitor =
new WaveformMonitor(
gridChart,
_seriesNames,
_samplingFrequency,
DefaultColors.SeriesForBlackBackgroundWpf[0],
null);
m_WaveformMonitor.Chart.ChartName = "示波器";
gridChart.SizeChanged += gridChart_SizeChanged;
string strTitle = "示波器 (幅值 / 时间)\n"
+ " " + string.Format("采样频率 = {0} kHz",
((double)+_samplingFrequency / 1000.0).ToString("0"));
m_WaveformMonitor.Initialize(_samplingFrequency, strTitle,
XAxisScrollMode.Scrolling, 0.03125);
m_WaveformMonitor.Chart.ViewXY.ZoomPanOptions.MouseWheelZooming = MouseWheelZooming.Off;
}
if (m_CodeMonitor == null)
{
// Let's disable SizeChanged event handler temporarily.
// ArrangeMonitors method is called at the end of this
// method.
gridChart.SizeChanged -= gridChart_SizeChanged;
m_CodeMonitor =
new WaveformMonitor(
gridChart,
new string[] {
"PCM编码"
},
_samplingFrequency,
DefaultColors.SeriesForBlackBackgroundWpf[0],
null);
m_CodeMonitor.Chart.ChartName = "PCM显示器";
gridChart.SizeChanged += gridChart_SizeChanged;
m_CodeMonitor.Initialize(_samplingFrequency, null,
XAxisScrollMode.Scrolling, 0.03125);
//重新设置Y轴范围
m_CodeMonitor.Chart.ViewXY.YAxes.FirstOrDefault().SetRange(-0.5, 1.5);
m_CodeMonitor.Chart.ViewXY.ZoomPanOptions.MouseWheelZooming = MouseWheelZooming.Off;
}
ArrangeMonitors();
}
/// <summary>
/// 初始化示波器
/// </summary>
private void InitWaveformMonitors()
{
bool bCreate = false;
if (m_aWaveformMonitors != null)
{
if (_channelCount != m_aWaveformMonitors.Length)
{
DisposeWaveformMonitors();
bCreate = true;
}
}
else
{
bCreate = true;
}
if (bCreate)
{
m_aWaveformMonitors = new WaveformMonitor[_channelCount];
for (int i = 0; i < _channelCount; i++)
{
WaveformMonitor wm =
new WaveformMonitor(
gridChart,
new string[] { "输入" },
_samplingFrequency,
DefaultColors.SeriesForBlackBackgroundWpf[i % DefaultColors.SeriesForBlackBackgroundWpf.Length],
null
);
wm.Chart.ChartName = "Waveform Chart " + (i + 1).ToString();
m_aWaveformMonitors[i] = wm;
}
// Re-enable SizeChanged event handler.
gridChart.SizeChanged += gridChart_SizeChanged;
}
for (int i = 0; i < _channelCount; i++)
{
string strTitle = "Audio waveform (amplitude / time)\n"
+ " " + string.Format("sfreq = {0} kHz",
((double)+_samplingFrequency / 1000.0).ToString("0"));
if (_channelCount == 2)
{
if (i == 0)
{
strTitle += " - Left";
}
else
{
strTitle += " - Right";
}
}
m_aWaveformMonitors[i].Initialize(_samplingFrequency, strTitle, XAxisScrollMode.Scrolling, 0.03125);
}
ArrangeMonitors();
}