ttaenc.MediaFileConverter.AudioFileToTipToiAudioFile C# (CSharp) Method

        public async static Task AudioFileToTipToiAudioFile(CancellationToken cancellationToken, string sourceFile, string oggDestinationFile)
        {
            using (new LogScope(log, "Convert {0} to {1}", sourceFile, oggDestinationFile))
            {
                using (var t = new FileTransaction(oggDestinationFile))
                {
                    var ext = Path.GetExtension(sourceFile).ToLowerInvariant();
                    var wavFile = oggDestinationFile + ".wav";
                    try
                    {
                        switch (ext)
                        {
                            case mp3Extension:
                                {
                                    await SubProcess.CheckedCall(cancellationToken
                                        , "mpg123.exe",
                                        "-w", wavFile.Quote(),
                                        sourceFile.Quote());

                                    bool isMono = true;

                                    await SubProcess.CheckedCall(cancellationToken,
                                        "oggenc2.exe",
                                        wavFile.Quote(),
                                        ("--output=" + t.TempPath).Quote(),
                                        "--resample", "22500",
                                        "--quiet",
                                        isMono ? null : "--downmix"
                                        );
                                }
                                break;
                            case oggExtension:
                                {
                                    bool isMono = GetIsMonoFromOggdecOutput(await SubProcess.GetOutput(cancellationToken
                                        , "oggdec.exe",
                                        "--wavout", wavFile.Quote(),
                                        "-q",
                                        sourceFile.Quote()));

                                    await SubProcess.CheckedCall(cancellationToken,
                                        "oggenc2.exe",
                                        wavFile.Quote(),
                                        ("--output=" + t.TempPath).Quote(),
                                        "--resample", "22500",
                                        "--quiet",
                                        isMono ? null : "--downmix"
                                        );
                                }
                                break;
                            case wavExtension:
                                {
                                    await SubProcess.CheckedCall(cancellationToken,
                                        "oggenc2.exe",
                                        sourceFile.Quote(),
                                        "-o", t.TempPath.Quote(),
                                        "--quiet",
                                        "--resample", "22500",
                                        "--downmix");
                                }
                                break;
                            default:
                                throw new ArgumentOutOfRangeException("sourceFile", sourceFile, "File type is not supported.");
                        }
                    }
                    finally
                    {
                        PathUtil.EnsureFileNotExists(wavFile);
                    }

                    t.Commit();
                }
            }
        }