Allow customizing minimum intro duration

Closes #51

ConfusedPolarBear.Plugin.IntroSkipper/Configuration/PluginConfiguration.cs

@@ -36,6 +36,11 @@ public class PluginConfiguration : BasePluginConfiguration
     /// </summary>
     public int AnalysisLengthLimit { get; set; } = 10;
 
+    /// <summary>
+    /// Gets or sets the minimum length of similar audio that will be considered an introduction.
+    /// </summary>
+    public int MinimumIntroDuration { get; set; } = 15;
+
     // ===== Playback settings =====
 
     /// <summary>

ConfusedPolarBear.Plugin.IntroSkipper/Configuration/configPage.html

@@ -64,17 +64,32 @@
                                 </div>
                             </div>
 
-                            <p>
+                            <div class="inputContainer">
-                                The amount of each episode's audio that will be analyzed is determined by these two
+                                <label class="inputLabel inputLabelUnfocused" for="MinimumDuration">
-                                settings. The minimum of (episode duration * percent, maximum runtime) is the amount of
+                                    Minimum introduction duration (in seconds)
-                                audio that will be analyzed. <br />
+                                </label>
+                                <input id="MinimumDuration" type="number" is="emby-input" min="1" />
+                                <div class="fieldDescription">
+                                    Similar sounding audio which is shorter than this duration will not be considered an
+                                    introduction.
+                                </div>
+                            </div>
 
-                                If these settings are changed after analyzing your media, the cached fingerprints and
+                            <p>
-                                introduction timestamps for each season you want to analyze with the modified settings
+                                The amount of each episode's audio that will be analyzed is determined using both
+                                the percentage of audio and maximum runtime of audio to analyze. The minimum of
+                                (episode duration * percent, maximum runtime) is the amount of audio that will
+                                be analyzed. <br />
+
+                                If the audio percentage or maximum runtime settings are changed after analyzing your
+                                media, the cached fingerprints and introduction timestamps for each season you want to
+                                analyze with the modified settings
                                 will have to be deleted.
                             </p>
 
-                            <strong>Increasing these settings will cause episode analysis to take much longer.</strong>
+                            <strong>
+                                Increasing either of these settings will cause episode analysis to take much longer.
+                            </strong>
                         </details>
                     </fieldset>
 
@@ -480,6 +495,7 @@
 
                         document.querySelector('#AnalysisPercent').value = config.AnalysisPercent;
                         document.querySelector('#AnalysisLengthLimit').value = config.AnalysisLengthLimit;
+                        document.querySelector('#MinimumDuration').value = config.MinimumIntroDuration;
 
                         document.querySelector('#CacheFingerprints').checked = config.CacheFingerprints;
                         document.querySelector('#ShowPromptAdjustment').value = config.ShowPromptAdjustment;
@@ -498,6 +514,7 @@
 
                         config.AnalysisPercent = document.querySelector('#AnalysisPercent').value;
                         config.AnalysisLengthLimit = document.querySelector('#AnalysisLengthLimit').value;
+                        config.MinimumIntroDuration = document.querySelector('#MinimumDuration').value;
 
                         config.CacheFingerprints = document.querySelector('#CacheFingerprints').checked;
                         config.ShowPromptAdjustment = document.querySelector("#ShowPromptAdjustment").value;

ConfusedPolarBear.Plugin.IntroSkipper/QueueManager.cs

@@ -48,12 +48,13 @@ public class QueueManager
         var config = Plugin.Instance!.Configuration;
         analysisPercent = Convert.ToDouble(config.AnalysisPercent) / 100;
 
-        if (config.AnalysisLengthLimit != 10 || config.AnalysisPercent != 25)
+        if (config.AnalysisLengthLimit != 10 || config.AnalysisPercent != 25 || config.MinimumIntroDuration != 15)
         {
             _logger.LogDebug(
-                "Introduction scan is limited to the first {Percent}% or the first {Minutes} minutes of each episode (whichever is smaller)",
+                "Analysis settings have been changed to: {Percent}%/{Minutes}m and a minimum of {Minimum}s",
                 config.AnalysisPercent,
-                config.AnalysisLengthLimit);
+                config.AnalysisLengthLimit,
+                config.MinimumIntroDuration);
         }
 
         // For all TV show libraries, enqueue all contained items.

ConfusedPolarBear.Plugin.IntroSkipper/ScheduledTasks/FingerprinterTask.cs

@@ -15,11 +15,6 @@ namespace ConfusedPolarBear.Plugin.IntroSkipper;
 /// </summary>
 public class FingerprinterTask : IScheduledTask
 {
-    /// <summary>
-    /// Minimum time (in seconds) for a contiguous time range to be considered an introduction.
-    /// </summary>
-    private const int MinimumIntroDuration = 15;
-
     /// <summary>
     /// Maximum number of bits (out of 32 total) that can be different between segments before they are considered dissimilar.
     /// 6 bits means the audio must be at least 81% similar (1 - 6 / 32).
@@ -68,6 +63,11 @@ public class FingerprinterTask : IScheduledTask
     /// </summary>
     private Dictionary<Guid, ReadOnlyCollection<uint>> _fingerprintCache;
 
+    /// <summary>
+    /// Minimum duration of similar audio that will be considered an introduction.
+    /// </summary>
+    private static int minimumIntroDuration = 15;
+
     /// <summary>
     /// Initializes a new instance of the <see cref="FingerprinterTask"/> class.
     /// </summary>
@@ -143,6 +143,8 @@ public class FingerprinterTask : IScheduledTask
             MaxDegreeOfParallelism = Plugin.Instance!.Configuration.MaxParallelism
         };
 
+        minimumIntroDuration = Plugin.Instance!.Configuration.MinimumIntroDuration;
+
         Parallel.ForEach(queue, options, (season) =>
         {
             var first = season.Value[0];
@@ -533,7 +535,7 @@ public class FingerprinterTask : IScheduledTask
 
         // Now that both fingerprints have been compared at this shift, see if there's a contiguous time range.
         var lContiguous = TimeRangeHelpers.FindContiguous(lhsTimes.ToArray(), MaximumDistance);
-        if (lContiguous is null || lContiguous.Duration < MinimumIntroDuration)
+        if (lContiguous is null || lContiguous.Duration < minimumIntroDuration)
         {
             return (new TimeRange(), new TimeRange());
         }
@@ -599,7 +601,7 @@ public class FingerprinterTask : IScheduledTask
             var id = episode.EpisodeId;
             var duration = GetIntroDuration(id);
 
-            if (duration < MinimumIntroDuration)
+            if (duration < minimumIntroDuration)
             {
                 continue;
             }