/// <summary>
/// Creates a new RIFF header for an audio stream.
/// </summary>
/// <param name="sampleRate">The sample rate for the header.</param>
/// <param name="bitRate">The bit rate for the header.</param>
/// <returns>The constructed RIFF header.</returns>
public RIFFHeader CreateHeader(int sampleRate, short bitRate)
{
RIFFHeader hdr = new RIFFHeader();
hdr.ChunkID = Encoding.ASCII.GetBytes("RIFF");
hdr.RiffType = Encoding.ASCII.GetBytes("WAVE");
hdr.FmtID = Encoding.ASCII.GetBytes("fmt ");
hdr.SubChunkID = Encoding.ASCII.GetBytes("data");
hdr.SubChunkSize = 0;
hdr.FileSize = 0;
hdr.FmtSize = 16;
hdr.FmtCode = 1;
hdr.Channels = 1;
hdr.SampleRate = sampleRate;
hdr.BitsPerSample = bitRate;
hdr.BlockAlign = (short)(hdr.Channels * bitRate / 8);
hdr.ByteRate = sampleRate * hdr.BlockAlign;
return(hdr);
}
/// <summary>
/// Saves a wave file.
/// </summary>
/// <param name="data">The data to save.</param>
/// <param name="hdr">The RIFF header of the data.</param>
public void SaveWave(List <byte> data, RIFFHeader hdr)
{
using (FileStream fs = new FileStream(fileName, FileMode.Create)) {
using (BinaryWriter writer = new BinaryWriter(fs)) {
writer.Write(hdr.ChunkID);
writer.Write(Marshal.SizeOf(hdr) + data.Count);
writer.Write(hdr.RiffType);
writer.Write(hdr.FmtID);
writer.Write(hdr.FmtSize);
writer.Write(hdr.FmtCode);
writer.Write(hdr.Channels);
writer.Write(hdr.SampleRate);
writer.Write(hdr.ByteRate);
writer.Write(hdr.BlockAlign);
writer.Write(hdr.BitsPerSample);
writer.Write(hdr.SubChunkID);
writer.Write(data.Count);
writer.Write(data.ToArray());
}
}
}
/// <summary>
/// Pastes the copied data from the clipboard to the selected position in the time domain.
/// If the copied data has two channels, it will paste the right channel to the right channel if the window to paste in has a right channel.
/// If the copied data has one channel, and the window to paste in has two channels, it will paste the single channel into both channels.
/// </summary>
/// <param name="window">The audio panel that the time domain is in.</param>
/// <param name="copyData">The copied data on the clipboard.</param>
/// <param name="dualChannel">Whether the audio stream has two channels or not.</param>
public static void Paste(AudioPanel window, ClipboardData copyData, bool dualChannel)
{
// Paste to the selected position if the time domain is not empty
if (window.LChannel != null)
{
// Gets the position of the selection
int cursorPos = (int)window.LTimeChannel.ChartArea.CursorX.Position;
// Maps the selected position to and index in the data
int pastePos;
if (cursorPos < window.LTimeChannel.Series.Points.Count)
{
pastePos = (int)window.LTimeChannel.Series.Points[cursorPos].XValue;
}
else
{
pastePos = (int)window.LTimeChannel.Series.Points[window.LTimeChannel.Series.Points.Count - 1].XValue;
}
List <short> data = new List <short>(copyData.LChannel);
// Converts bit rate if needed
if (copyData.Header.BitsPerSample > window.Header.BitsPerSample)
{
for (int i = 0; i < data.Count; i++)
{
data[i] = BitMapper.To8Bit(data[i]);
}
}
else if (copyData.Header.BitsPerSample < window.Header.BitsPerSample)
{
for (int i = 0; i < data.Count; i++)
{
data[i] = BitMapper.To16Bit(data[i]);
}
}
// Inserts the data at the selected position
window.LChannel.InsertRange(pastePos, data);
if (dualChannel)
{
if (copyData.RChannel != null)
{
data = new List <short>(copyData.RChannel);
if (copyData.Header.BitsPerSample > window.Header.BitsPerSample)
{
for (int i = 0; i < data.Count; i++)
{
data[i] = BitMapper.To8Bit(data[i]);
}
}
else if (copyData.Header.BitsPerSample < window.Header.BitsPerSample)
{
for (int i = 0; i < data.Count; i++)
{
data[i] = BitMapper.To16Bit(data[i]);
}
}
}
window.RChannel.InsertRange(pastePos, data);
}
// Create a new header and paste the data if the time domain is empty
}
else
{
// Creates the new RIFF header for the data
RIFFHeader hdr = copyData.Header;
// Copies the data to the channels
window.LChannel = copyData.LChannel;
if (copyData.RChannel != null)
{
if (!dualChannel)
{
window.AddRChannel();
}
window.RChannel = copyData.RChannel;
}
else
{
if (dualChannel)
{
window.RChannel = copyData.LChannel;
hdr.Channels = 2;
}
}
window.RawData = window.DataToBytes();
window.MenuStrip.InfoLabel.Text = hdr.SampleRate + " Sample rate" + " | " + hdr.BitsPerSample + " Bit rate";
//Assigns new header to the window
hdr.SubChunkSize = window.RawData.Count;
window.Header = hdr;
}
}
