private void dumpButton_Click(object sender, EventArgs e)
{
if (!validateWavFilename())
{
return;
}
Application.DoEvents();
using (NAudio.Wave.WaveFileReader waveFile = new NAudio.Wave.WaveFileReader(wavFilenameTextBox.Text))
{
tapFile = new TapFile();
WaveSeeker waveSeeker = new WaveSeeker(waveFile);
infoTextBox.Clear();
// Read Header Information
if (!readHeaderInfo(waveSeeker))
{
return;
}
byte theByte = 0;
short counter = 0;
string charVersion = "";
// while not eof...
while (waveSeeker.readByte(out theByte))
{
infoTextBox.AppendText(theByte.ToString("X2") + " ");
charVersion += printableChar((char)theByte);
if (counter == 7)
{
infoTextBox.AppendText(" " + charVersion + Environment.NewLine);
charVersion = "";
counter = 0;
}
else
{
counter++;
}
}
// Formatting...
while (counter < 8)
{
infoTextBox.AppendText(" ");
counter++;
}
if (charVersion != "")
{
infoTextBox.AppendText(" " + charVersion + Environment.NewLine + Environment.NewLine);
}
}
}
private bool readLoadPoint(WaveSeeker waveSeeker)
{
// Read load point
if ((tapFile.fileType == '9') || (tapFile.fileType == 'M'))
{
tapFile.loadPoint = waveSeeker.readUShort();
infoTextBox.AppendText("Load Point: " + "0x" + tapFile.loadPoint.ToString("X4") + Environment.NewLine);
}
return(true);
}
private bool findA5Byte(WaveSeeker waveSeeker)
{
if (!waveSeeker.seekA5Byte())
{
infoTextBox.AppendText("Failed: A5 Byte not found! End Of File." + Environment.NewLine);
return(false);
}
infoTextBox.AppendText("A5 byte found at " + waveSeeker.WavePositions.max + Environment.NewLine);
return(true);
}
private bool readLoadFilename(WaveSeeker waveSeeker)
{
tapFile.loadName = waveSeeker.readLoadName();
if (tapFile.loadName == "")
{
infoTextBox.AppendText("Failed: Load Name not found." + Environment.NewLine);
return(false);
}
infoTextBox.AppendText("Load Name: " + (tapFile.loadName == "<Level9>" ? "N/A " : "") + tapFile.loadName + Environment.NewLine);
return(true);
}
private bool readFileType(WaveSeeker waveSeeker)
{
tapFile.fileType = waveSeeker.readFileType();
if (tapFile.fileType == '\0')
{
infoTextBox.AppendText("Warning: File Type not found." + Environment.NewLine);
}
else
{
infoTextBox.AppendText("File Type: " + tapFile.fileType + Environment.NewLine);
}
return(true);
}
private bool readProgramLength(WaveSeeker waveSeeker)
{
// Read program length
tapFile.programLength = waveSeeker.readUShort();
if (tapFile.programLength == 0)
{
infoTextBox.AppendText("Warning: Program Length not found." + Environment.NewLine);
}
else
{
infoTextBox.AppendText("Program Length: " + tapFile.programLength + Environment.NewLine);
}
return(true);
}
private bool readProgramBytes(WaveSeeker waveSeeker)
{
tapFile.program = new byte[tapFile.programLength];
programLength = waveSeeker.readProgram(tapFile.program, tapFile.programLength);
if (tapFile.programLength != programLength)
{
infoTextBox.AppendText("Failed: Actual length: " + programLength + Environment.NewLine);
return(false);
}
if (waveSeeker.EndOfFile)
{
infoTextBox.AppendText("Failed: End-of-file reached. " + Environment.NewLine);
return(false);
}
return(true);
}
private bool findSyncZero(WaveSeeker waveSeeker)
{
WavePositionsStruct wavePositions = waveSeeker.findSyncZero();
if (waveSeeker.EndOfFile)
{
infoTextBox.AppendText("Failed: Sync zero not found. End of File." + Environment.NewLine);
return(false);
}
infoTextBox.AppendText(
"Sync zero found. " +
"(" + wavePositions.start +
"," + wavePositions.min +
"," + wavePositions.crossover +
"," + wavePositions.max + ")" + Environment.NewLine
);
return(true);
}
private bool validateWavFormat(WaveSeeker waveSeeker)
{
infoTextBox.AppendText("Wave Format: " + waveSeeker.WaveFormat + Environment.NewLine);
infoTextBox.AppendText("Length: " + waveSeeker.WaveFile.Length + " bytes" + Environment.NewLine);
infoTextBox.AppendText("Total time: " + waveSeeker.WaveFile.TotalTime + Environment.NewLine);
// Validate wave file format
if (waveSeeker.WaveFormat.BitsPerSample != 16)
{
infoTextBox.AppendText("Failed: only works with 16 bit audio (-for now)." + Environment.NewLine);
return(false);
}
if (waveSeeker.WaveFormat.SampleRate != 22050)
{
infoTextBox.AppendText("Failed: only works with 22Khz sample rate (-for now)." + Environment.NewLine);
return(false);
}
return(true);
}
private void ReloadButton_Click(object sender, EventArgs e)
{
if (!validateWavFilename())
{
return;
}
Application.DoEvents();
using (NAudio.Wave.WaveFileReader waveFile = new NAudio.Wave.WaveFileReader(wavFilenameTextBox.Text))
{
tapFile = new TapFile();
WaveSeeker waveSeeker = new WaveSeeker(waveFile);
// Read Header Information
if (!readHeaderInfo(waveSeeker))
{
return;
}
// If we don't know the program length
if (tapFile.programLength == 0)
{
return;
}
// Read program itself
if (!readProgramBytes(waveSeeker))
{
return;
}
// Display program bytes
displayProgramBytes();
// Validate Basic terminator
if ((tapFile.fileType == 'B') && (tapFile.program[tapFile.programLength - 1] != 0x80))
{
infoTextBox.AppendText("Warning: 'End-of-program' terminator missing (&80)" + Environment.NewLine);
}
// Actual length
infoTextBox.AppendText(Environment.NewLine + "Length: " + tapFile.programLength + " (agreed)" + Environment.NewLine);
infoTextBox.AppendText(Environment.NewLine + "Trailing Information:" + Environment.NewLine + "---------------------" + Environment.NewLine);
// Read checksum
if ((tapFile.fileType == 'M') || (tapFile.fileType == 'D') || (tapFile.fileType == '9'))
{
if (!waveSeeker.readChecksum(out tapFile.checksum))
{
infoTextBox.AppendText("Warning: Checksum wrong/not found (ignored)" + Environment.NewLine);
}
infoTextBox.AppendText("Checksum: " + tapFile.checksum.ToString("X2") + Environment.NewLine);
// Calculate actual checksum
byte actualChecksum = 0;
for (int i = 0; i < tapFile.program.Length; i++)
{
actualChecksum += tapFile.program[i];
}
infoTextBox.AppendText("Calculated Checksum: " + actualChecksum.ToString("X2"));
if (tapFile.checksum == actualChecksum)
{
infoTextBox.AppendText(" (agreed)" + Environment.NewLine);
}
else
{
infoTextBox.AppendText(Environment.NewLine + "Warning: checksums disagree (ignored)" + Environment.NewLine);
}
tapFile.checksum = actualChecksum;
if ((tapFile.fileType == 'M') || (tapFile.fileType == 'D'))
{
waveSeeker.readByte(out tapFile.mysteryByte);
infoTextBox.AppendText("Mystery byte: " + tapFile.mysteryByte.ToString("X2") + Environment.NewLine);
}
}
// Read excution point
if (tapFile.fileType != '9' && tapFile.fileType != 'D')
{
tapFile.executionPoint = waveSeeker.readUShort();
infoTextBox.AppendText("Execution point: 0x" + tapFile.executionPoint.ToString("X4") + Environment.NewLine);
}
// Scroll to top
infoTextBox.SelectionStart = 0;
infoTextBox.SelectionLength = 1;
infoTextBox.ScrollToCaret();
// Now enable Tap controls.
saveButton.Enabled = isSaveEnabled();
}
}
private bool readHeaderInfo(WaveSeeker waveSeeker)
{
try
{
infoTextBox.Clear();
infoTextBox.AppendText("Header Information: " + Environment.NewLine + "-------------------" + Environment.NewLine);
if (!validateWavFormat(waveSeeker))
{
return(false);
}
if (!findSyncZero(waveSeeker))
{
return(false);
}
if (!findA5Byte(waveSeeker))
{
return(false);
}
if (!readLoadFilename(waveSeeker))
{
return(false);
}
if (tapFile.loadName == "<Level9>")
{
tapFile.fileType = '9';
if (!readLoadPoint(waveSeeker))
{
return(false);
}
if (!readProgramLength(waveSeeker))
{
return(false);
}
}
else if (tapFile.loadName != "")
{
if (!findA5Byte(waveSeeker))
{
return(false);
}
if (!readFileType(waveSeeker))
{
return(false);
}
if (!readProgramLength(waveSeeker))
{
return(false);
}
if (!readLoadPoint(waveSeeker))
{
return(false);
}
}
return(true);
}
catch (IOException err)
{
infoTextBox.AppendText(err.Message + Environment.NewLine + "Error reading file." + Environment.NewLine);
return(false);
}
}