121 lines
3.3 KiB
C#
121 lines
3.3 KiB
C#
using System;
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using AAXClean;
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using Dinah.Core.Net.Http;
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namespace AaxDecrypter
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{
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public abstract class AaxcDownloadConvertBase : AudiobookDownloadBase
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{
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public event EventHandler<AppleTags> RetrievedMetadata;
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protected AaxFile AaxFile;
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protected AaxcDownloadConvertBase(string outFileName, string cacheDirectory, DownloadOptions dlLic)
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: base(outFileName, cacheDirectory, dlLic) { }
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/// <summary>Setting cover art by this method will insert the art into the audiobook metadata</summary>
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public override void SetCoverArt(byte[] coverArt)
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{
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base.SetCoverArt(coverArt);
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if (coverArt is not null && AaxFile?.AppleTags is not null)
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AaxFile.AppleTags.Cover = coverArt;
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}
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protected bool Step_GetMetadata()
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{
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AaxFile = new AaxFile(InputFileStream);
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if (DownloadOptions.StripUnabridged)
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{
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AaxFile.AppleTags.Title = AaxFile.AppleTags.TitleSansUnabridged;
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AaxFile.AppleTags.Album = AaxFile.AppleTags.Album?.Replace(" (Unabridged)", "");
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}
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//Finishing configuring lame encoder.
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if (DownloadOptions.OutputFormat == OutputFormat.Mp3)
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{
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double bitrateMultiple = 1;
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if (AaxFile.AudioChannels == 2)
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{
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if (DownloadOptions.Downsample)
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bitrateMultiple = 0.5;
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else
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DownloadOptions.LameConfig.Mode = NAudio.Lame.MPEGMode.Stereo;
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}
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if (DownloadOptions.MatchSourceBitrate)
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{
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int kbps = (int)(AaxFile.AverageBitrate * bitrateMultiple / 1024);
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if (DownloadOptions.LameConfig.VBR is null)
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DownloadOptions.LameConfig.BitRate = kbps;
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else if (DownloadOptions.LameConfig.VBR == NAudio.Lame.VBRMode.ABR)
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DownloadOptions.LameConfig.ABRRateKbps = kbps;
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}
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}
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OnRetrievedTitle(AaxFile.AppleTags.TitleSansUnabridged);
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OnRetrievedAuthors(AaxFile.AppleTags.FirstAuthor ?? "[unknown]");
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OnRetrievedNarrators(AaxFile.AppleTags.Narrator ?? "[unknown]");
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OnRetrievedCoverArt(AaxFile.AppleTags.Cover);
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RetrievedMetadata?.Invoke(this, AaxFile.AppleTags);
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return !IsCanceled;
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}
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protected DownloadProgress Step_DownloadAudiobook_Start()
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{
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var zeroProgress = new DownloadProgress
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{
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BytesReceived = 0,
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ProgressPercentage = 0,
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TotalBytesToReceive = InputFileStream.Length
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};
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OnDecryptProgressUpdate(zeroProgress);
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AaxFile.SetDecryptionKey(DownloadOptions.AudibleKey, DownloadOptions.AudibleIV);
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return zeroProgress;
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}
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protected void Step_DownloadAudiobook_End(DownloadProgress zeroProgress)
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{
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AaxFile.Close();
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CloseInputFileStream();
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OnDecryptProgressUpdate(zeroProgress);
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}
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protected void AaxFile_ConversionProgressUpdate(object sender, ConversionProgressEventArgs e)
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{
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var duration = AaxFile.Duration;
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var remainingSecsToProcess = (duration - e.ProcessPosition).TotalSeconds;
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var estTimeRemaining = remainingSecsToProcess / e.ProcessSpeed;
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if (double.IsNormal(estTimeRemaining))
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OnDecryptTimeRemaining(TimeSpan.FromSeconds(estTimeRemaining));
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var progressPercent = (e.ProcessPosition / e.TotalDuration);
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OnDecryptProgressUpdate(
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new DownloadProgress
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{
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ProgressPercentage = 100 * progressPercent,
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BytesReceived = (long)(InputFileStream.Length * progressPercent),
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TotalBytesToReceive = InputFileStream.Length
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});
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}
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public override void Cancel()
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{
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IsCanceled = true;
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AaxFile?.Cancel();
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AaxFile?.Dispose();
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CloseInputFileStream();
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}
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}
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}
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