/// <summary>
/// Combines a WAV file (or any file SoX can handle) to one stereo WAV file.
/// If the file has more than two channels, only the first two are used.
/// </summary>
/// <param name="wavFile">The path to a WAV file.</param>
private static bool combineToStereo(string wavFile, string outwav)
{
SoXProcess p = new SoXProcess();
p.StartInfo.Arguments += wavFile.quote() + " " + outwav + " remix 1 2";
p.Start();
p.WaitForExit();
return(p.ExitCode == 0);
}
protected void readValuesWithSox()
{
Process check = new SoXProcess();
check.StartInfo.Arguments = "--info " + input.quote();
check.StartInfo.UseShellExecute = false;
check.StartInfo.RedirectStandardOutput = true;
check.StartInfo.RedirectStandardError = true;
check.Start();
check.WaitForExit();
StreamReader cleaner = check.StandardOutput;
String line = cleaner.ReadLine();
if (line == null) // if sox could not read the file and therefore gave no output
{
string s = check.StandardError.ReadToEnd();
throw new MusicFileException("SoX could not read the file " + ToString() + ": " + s);
}
while (line != null)
{
if (line.StartsWith("Channels"))
{
base.channels = Int32.Parse(line.Substring(line.IndexOf(':') + 2));
}
else if (line.StartsWith("Sample Rate"))
{
base.sampleRate = Int32.Parse(line.Substring(line.IndexOf(':') + 2));
}
else if (line.StartsWith("Duration"))
{
String[] splitLine = line.Split(' ');
int index = Array.IndexOf(splitLine, "samples");
base.length = Int32.Parse(splitLine[index - 1]);
}
line = cleaner.ReadLine();
}
cleaner.Close();
}
/// <summary>
/// Creates a BRSTM from the input file.
///
/// Note: while this function handles the conversion to WAV and the modification of channels/sample rate/etc.,
/// the conversion from WAV to BRSTM is handled by the build method.
/// </summary>
/// <param name="mainWindow">Can be null, or a ProgressBox that can be updated by this method and other methods that call it.</param>
/// <param name="opts">An OptionSet to read parameters from.</param>
/// <param name="outputFile">The file to output to.</param>
///
public bool create(TwoLineStatusBox mainWindow, OptionSet opts, string outputFile)
{
int newRate;
if (opts.convertRate == OptionSet.RATE_RELATIVE)
{
newRate = (int)Math.Round(opts.rateFactor * this.SampleRate);
if (newRate < opts.minimumRate)
{
newRate = opts.minimumRate; // Change to the minimum rate - this only needs to be checked if the rate is defined as a fraction
}
}
else if (opts.convertRate == OptionSet.RATE_ABSOLUTE)
{
newRate = opts.defaultRate;
}
else
{
newRate = this.SampleRate;
}
string basename = Path.GetFileNameWithoutExtension(input).Replace(" ", "_");
ProgressWindow progressWindow = new ProgressWindow(mainWindow, outputFile, "Working...", false);
progressWindow.Begin(0, 19245, 0);
progressWindow.Location = mainWindow.PointToScreen(new Point(0, 100));
if (mainWindow != null)
{
mainWindow.changeStatus("Current file: " + basename);
if (newRate >= this.SampleRate)
{
newRate = this.SampleRate; // This will keep the below code from changing the sample rate for this Music.
}
int channels = this.Channels;
String message = "";
if (this.Looping)
{
message = message + "loop: " + this.LoopStart + "-" + this.Length + ", ";
}
if (opts.convertToMono && (channels > 1))
{
message = message + "to mono, ";
}
if (opts.convertRate != OptionSet.RATE_NO_CONVERSION && this.SampleRate != newRate)
{
message = message + "new rate: " + newRate + ", ";
}
if (opts.ampType == OptionSet.AMPLITUDE_TYPE)
{
message = message + "amp: " + opts.ampAmount + "x, ";
}
else if (opts.ampType == OptionSet.DB_TYPE)
{
message = message + "amp: " + opts.ampAmount + " dB, ";
}
else if (opts.ampType == OptionSet.MAX_AMP_WITHOUT_CLIPPING)
{
message = message + "max amp w/o clipping, ";
}
if (message.Count() > 2) // do this if the message is not empty
{
message = message.Substring(0, message.Count() - 2); // remove last comma and space
mainWindow.changeMessage(message);
}
else
{
mainWindow.changeMessage("");
}
}
try { // this is where the magic happens!
progressWindow.Caption = "Creating temporary WAV file...";
progressWindow.Update();
if (wavFile == null)
{
convertToWav();
}
progressWindow.Caption = "Converting to mono...";
progressWindow.Update(4971);
/**
* WAV files after stereo/mono conversion.
*/
string step1wav;
if (channels == 1) // already mono
{
step1wav = wavFile;
}
else
{
if (channels > 2)
{
Console.WriteLine("This stream has more than two channels. Only using first two.");
}
step1wav = Shared.TMP_DIR + Path.DirectorySeparatorChar + "step1_" + basename + ".wav";
bool b;
if (opts.convertToMono) // not mono; converting to mono
{
b = combineToMono(wavFile, step1wav); // this function uses only the first two channels
}
else // not mono; converting to stereo if necessary
{
b = combineToStereo(wavFile, step1wav);
}
if (b)
{
File.Delete(wavFile);
wavFile = null;
}
else
{
throw new MusicFileException("convertToMono or convertToStereo failed.");
}
}
progressWindow.Caption = "Converting sample rate...";
progressWindow.Update(5610);
/**
* WAV files after sample rate conversion.
*/
string step2wav;
if (opts.convertRate != OptionSet.RATE_NO_CONVERSION && newRate != this.SampleRate)
{
step2wav = Shared.TMP_DIR + Path.DirectorySeparatorChar + "step2_" + basename + ".wav";
Process rate = new SoXProcess();
rate.StartInfo.Arguments += step1wav + " -r " + newRate + " " + step2wav;
rate.Start();
rate.WaitForExit();
File.Delete(step1wav);
}
else
{
step2wav = step1wav;
}
progressWindow.Caption = "Amplifying audio...";
progressWindow.Update(7815);
/**
* WAV files after amplification.
*/
string step3wav;
bool amplify = true;
String[] soxOpts = new String[2];
if (opts.ampType == OptionSet.NO_AMP)
{
amplify = false;
}
else if (opts.ampType == OptionSet.AMPLITUDE_TYPE)
{
soxOpts[0] = "vol";
soxOpts[1] = opts.ampAmount + "amplitude";
}
else if (opts.ampType == OptionSet.DB_TYPE)
{
soxOpts[0] = "vol";
soxOpts[1] = opts.ampAmount + "dB";
}
else if (opts.ampType == OptionSet.MAX_AMP_WITHOUT_CLIPPING)
{
soxOpts[0] = "gain";
soxOpts[1] = "-n";
}
if (amplify)
{
step3wav = Shared.TMP_DIR + Path.DirectorySeparatorChar + "step3_" + basename + ".wav";
Process amp = new SoXProcess();
amp.StartInfo.UseShellExecute = false;
amp.StartInfo.RedirectStandardError = true;
amp.StartInfo.Arguments += step2wav + " " + step3wav + " " + soxOpts[0] + " " + soxOpts[1];
amp.Start();
amp.WaitForExit();
File.Delete(step2wav);
}
else
{
step3wav = step2wav;
}
// make the new BRSTMs
double ratio = (double)newRate / SampleRate;
int newLoopStart = (int)(LoopStart * ratio);
int newLength = (int)(Length * ratio);
progressWindow.Caption = "Creating output...";
progressWindow.Update(8181);
opts.outputFormat.build(progressWindow, new SubRangeProgressTracker(8181, 19245, progressWindow),
step3wav, outputFile, Looping, newLoopStart, newLength, opts.loopTrim);
progressWindow.Caption = "Deleting temporary files...";
progressWindow.Update(19245);
File.Delete(step3wav);
progressWindow.Finish();
return(true);
} catch (Exception e) {
// Exceptions are caught here, and then false is returned to the main method in Program.cs.
Shared.errorDialog(e.Message);
return(false);
}
}
