/*
* Draws the waveform(s) on the Graphics object
*/
private void DrawWaveform(Graphics g)
{
if (m_CurrentWaveformGroup == null)
{
return;
}
try
{
// Get number of channels
int nChannelsCount = m_CurrentWaveformGroup.ChannelCount;
if (nChannelsCount == 0)
{
return;
}
// How many samples do we have in a channel
int nSamplesPerChannel = m_CurrentWaveformGroup.GetNumberOfSamplesPerChannel();
if (nSamplesPerChannel == 0)
{
return;
}
int[] nAllData;
int nSampleIndex, nChannelIndex;
int iMaxVal, iMinVal;
double dExtent = 0;
double dVertStep = 0;
RectangleF DrawTextRect;
int nViewRectHeight = m_nPageHeight - m_nFrameWidth;
int nViewRectWidth = m_nPageWidth;
DicomCodeSequenceItem ChannelSource;
iMaxVal = -32768;
iMinVal = 32767;
// Find the minimum and maximum value for all the channels
for (nChannelIndex = 0; nChannelIndex < nChannelsCount; nChannelIndex++)
{
nAllData = m_CurrentWaveformGroup.GetChannel(nChannelIndex).GetChannelSamples();
for (nSampleIndex = 0; nSampleIndex < nSamplesPerChannel; nSampleIndex++)
{
if (nAllData[nSampleIndex] > iMaxVal)
{
iMaxVal = nAllData[nSampleIndex];
}
else if (nAllData[nSampleIndex] < iMinVal)
{
iMinVal = nAllData[nSampleIndex];
}
}
dVertStep = nViewRectHeight / nChannelsCount;
dExtent = ((iMaxVal - iMinVal) * 1.2) / dVertStep;
}
int nIndex = 0;
string strText;
DicomWaveformAnnotation ann;
long lStartPoint;
// Loop through the channels one by one
for (nChannelIndex = 0; nChannelIndex < nChannelsCount; nChannelIndex++)
{
strText = "";
nIndex = nChannelsCount - nChannelIndex - 1;
//Get the data for this channel
nAllData = m_CurrentWaveformGroup.GetChannel(nIndex).GetChannelSamples();
lStartPoint = ((nViewRectHeight + (int)((double)((nChannelIndex) * -1 * (int)dVertStep) - (nAllData[0] - iMinVal) / dExtent))) + m_nFrameWidth / 2;
// Get the channel source
ChannelSource = m_CurrentWaveformGroup.GetChannel(nIndex).GetChannelSource();
DrawTextRect = new RectangleF(5, lStartPoint, m_nFrameWidth - 5, (float)dVertStep);
if ((ChannelSource != null) && (ChannelSource.CodeMeaning != null))
{
// Display the channel source
strText = ChannelSource.CodeMeaning;
if (m_CurrentWaveformGroup.GetChannel(nIndex).GetAnnotationCount() > 0)
{
// Display the channel annotation
ann = m_CurrentWaveformGroup.GetChannel(nIndex).GetAnnotation(0);
if (ann != null)
{
if ((ann.UnformattedTextValue != null) && (ann.UnformattedTextValue != ""))
{
strText += " (";
strText += ann.UnformattedTextValue;
strText += ")";
}
else
{
if ((ann.CodedName != null) && ((ann.CodedName.CodeMeaning != null) && ann.CodedName.CodeMeaning != ""))
{
strText += " (";
strText += ann.CodedName.CodeMeaning;
strText += ")";
}
}
}
}
g.DrawString(strText, new Font(FontFamily.GenericSansSerif, 10), Brushes.Red, DrawTextRect);
}
int nDiff;
double dRatio;
int nOffset;
// Draw the points/lines for this channel
Point ptPreviousPoint, ptCurrentPoint;
ptPreviousPoint = new Point(m_nFrameWidth, (int)lStartPoint);
for (nSampleIndex = 1; nSampleIndex < nSamplesPerChannel; nSampleIndex++)
{
nDiff = nAllData[nSampleIndex] - iMinVal;
dRatio = (double)nDiff / dExtent;
nOffset = m_nFrameWidth / 2;
ptCurrentPoint = new Point(
(nSampleIndex * nViewRectWidth / nSamplesPerChannel) + m_nFrameWidth,
((nViewRectHeight + (int)(((double)(nChannelIndex) * -1 * dVertStep) - dRatio))) + nOffset);
g.DrawLine(new Pen(Color.FromArgb(0, 255, 0)), ptPreviousPoint, ptCurrentPoint);
ptPreviousPoint = ptCurrentPoint;
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
/*
* Adds a waveform group for a Wav file to a Dataset
*/
private bool InsertWaveStream(ref DicomDataSet InDS, string strInputWaveFileName)
{
DicomWaveformGroup AudioWaveformGroup = new DicomWaveformGroup();
int nNumberOfChannels = 0;
// Load an audio file into the waveform group
try
{
AudioWaveformGroup.LoadAudio(strInputWaveFileName);
}
catch (Exception ex)
{
MessageBox.Show("Couldn't insert the wave stream into the dataset.\r\n\r\n" + ex.ToString());
return(false);
}
// Verify that hte frequency is 8K
int nSamplingFrequency = (int)AudioWaveformGroup.GetSamplingFrequency();
if (nSamplingFrequency != 8000)
{
MessageBox.Show("The samples per second (sampling rate) for the wave file should be 8KHz.");
return(false);
}
// Set the channel source
nNumberOfChannels = AudioWaveformGroup.ChannelCount;
if (nNumberOfChannels > 0)
{
DicomWaveformChannel channel = null;
DicomCodeSequenceItem DicomSourceSequenceItem = new DicomCodeSequenceItem();
DicomSourceSequenceItem.CodeMeaning = "Dictation";
DicomSourceSequenceItem.CodeValue = "110011";
DicomSourceSequenceItem.CodingSchemeDesignator = "DCM";
DicomSourceSequenceItem.CodingSchemeVersion = "01";
for (int nIndex = 0; nIndex < nNumberOfChannels; nIndex++)
{
channel = AudioWaveformGroup.GetChannel(nIndex);
if (channel != null)
{
try
{
channel.SetChannelSource(DicomSourceSequenceItem);
}
catch (Exception ex)
{
MessageBox.Show("Couldn't set the channel source\r\n\r\n" + ex.ToString());
return(false);
}
}
}
}
// Insert the waveform group into the dataset
try
{
InDS.AddWaveformGroup(AudioWaveformGroup, 0);
}
catch (Exception ex)
{
MessageBox.Show("Couldn't insert the wave stream into the dataset.\r\n\r\n" + ex.ToString());
return(false);
}
return(true);
}
/*
* Creates a new WaveformAttributesDialog and initializes the form elements with the information
* from the DicomWaveformGroup passed
*/
public WaveformAttributesDialog(ref DicomWaveformGroup pWaveformGroup)
{
InitializeComponent();
m_pWaveformGroup = pWaveformGroup;
// Add columns
lvChannelAttributes.Columns.Add("Channel Sensitivity");
lvChannelAttributes.Columns.Add("Channel Sensitivity Units");
lvChannelAttributes.Columns.Add("Channel Source");
lvChannelAttributes.Columns.Add("Filter Low Freq.");
lvChannelAttributes.Columns.Add("Filter High Freq.");
lvChannelAttributes.Columns.Add("Waveform Annotation");
lvChannelAttributes.Columns[0].Width = 116;
lvChannelAttributes.Columns[1].Width = 138;
lvChannelAttributes.Columns[2].Width = 100;
lvChannelAttributes.Columns[3].Width = 100;
lvChannelAttributes.Columns[4].Width = 100;
lvChannelAttributes.Columns[5].Width = 150;
if ((m_pWaveformGroup != null) && (m_pWaveformGroup.ChannelCount > 0))
{
DicomWaveformChannel channel = null;
DicomCodeSequenceItem ChannelSource;
DicomWaveformAnnotation annotation = null;
// Populate the text boxes with the general waveform information
txtNumberOfChannels.Text = string.Format("{0:g}", m_pWaveformGroup.ChannelCount);
txtSamplingFrequency.Text = string.Format("{0:g}", m_pWaveformGroup.GetSamplingFrequency());
txtNumberOfWaveformSamples.Text = string.Format("{0:g}", m_pWaveformGroup.GetNumberOfSamplesPerChannel());
switch (m_pWaveformGroup.GetSampleInterpretation())
{
case DicomWaveformSampleInterpretationType.Signed16BitLinear:
txtSampleInterpretation.Text = "signed 16 bit linear";
break;
case DicomWaveformSampleInterpretationType.Unsigned16BitLinear:
txtSampleInterpretation.Text = "unsigned 16 bit linear";
break;
case DicomWaveformSampleInterpretationType.Signed8BitLinear:
txtSampleInterpretation.Text = "signed 8 bit linear";
break;
case DicomWaveformSampleInterpretationType.Unsigned8BitLinear:
txtSampleInterpretation.Text = "unsigned 8 bit linear";
break;
case DicomWaveformSampleInterpretationType.Mulaw8Bit:
txtSampleInterpretation.Text = "8 bit mu-law";
break;
case DicomWaveformSampleInterpretationType.Alaw8Bit:
txtSampleInterpretation.Text = "8 bit A-law";
break;
}
switch (m_pWaveformGroup.GetSampleInterpretation())
{
case DicomWaveformSampleInterpretationType.Signed16BitLinear:
case DicomWaveformSampleInterpretationType.Unsigned16BitLinear:
txtWaveformBitsAllocated.Text = "16";
break;
case DicomWaveformSampleInterpretationType.Signed8BitLinear:
case DicomWaveformSampleInterpretationType.Unsigned8BitLinear:
case DicomWaveformSampleInterpretationType.Mulaw8Bit:
case DicomWaveformSampleInterpretationType.Alaw8Bit:
txtWaveformBitsAllocated.Text = "8";
break;
}
txtWaveformPaddingValue.Text = string.Format("{0:g}", m_pWaveformGroup.GetWaveformPaddingValue());
// Populate the list view with the specific information for each channel
string[] strItemText;
for (int nIndex = 0; nIndex < m_pWaveformGroup.ChannelCount; nIndex++)
{
channel = m_pWaveformGroup.GetChannel(nIndex);
if (channel != null)
{
DicomChannelSensitivity channelSensitivity = channel.GetChannelSensitivity();
if ((channelSensitivity != null) && ((channelSensitivity.SensitivityUnits.CodeMeaning != null) && (channelSensitivity.SensitivityUnits.CodeMeaning != "")))
{
ChannelSource = channel.GetChannelSource();
strItemText = new string[6] {
string.Format("{0:g}", channelSensitivity.Sensitivity),
channelSensitivity.SensitivityUnits.CodeMeaning,
ChannelSource.CodeMeaning,
string.Format("{0:g}", channel.GetFilterLowFrequency()),
string.Format("{0:g}", channel.GetFilterHighFrequency()),
""
};
if (channel.GetAnnotationCount() > 0)
{
annotation = channel.GetAnnotation(0);
if (annotation != null)
{
if ((annotation.UnformattedTextValue != null) && (annotation.UnformattedTextValue != ""))
{
strItemText[5] = annotation.UnformattedTextValue;
}
else
{
if ((annotation.CodedName != null) && ((annotation.CodedName.CodeMeaning != null) && (annotation.CodedName != null)))
{
strItemText[5] = annotation.CodedName.CodeMeaning;
}
}
}
}
lvChannelAttributes.Items.Add(new ListViewItem(strItemText));
}
}
}
}
}
