Some additions for mixdowns and ability encode from JSON string.

win/CS/HandBrake.ApplicationServices/Interop/HandBrakeEncoderHelpers.cs

@@ -244,6 +244,16 @@ public static HBMixdown GetMixdown(string shortName)
             return Mixdowns.SingleOrDefault(m => m.ShortName == shortName);
         }
 
+		/// <summary>
+		/// Gets the mixdown with the specified ID.
+		/// </summary>
+		/// <param name="id">The mixdown ID.</param>
+		/// <returns>The requested mixdown.</returns>
+	    public static HBMixdown GetMixdown(int id)
+	    {
+		    return Mixdowns.SingleOrDefault(m => m.Id == id);
+	    }
+
         /// <summary>
         /// Gets the container with the specified short name.
         /// </summary>
@@ -489,6 +499,17 @@ public static HBMixdown GetDefaultMixdown(HBAudioEncoder encoder, ulong layout)
             return Mixdowns.Single(m => m.Id == defaultMixdown);
         }
 
+		/// <summary>
+		/// Sanitizes the given sample rate for the given encoder.
+		/// </summary>
+		/// <param name="encoder">The encoder.</param>
+		/// <param name="sampleRate">The sample rate to sanitize.</param>
+		/// <returns>The sanitized sample rate.</returns>
+	    public static int SanitizeSampleRate(HBAudioEncoder encoder, int sampleRate)
+	    {
+		    return HBFunctions.hb_audio_samplerate_find_closest(sampleRate, (uint)encoder.Id);
+	    }
+
         /// <summary>
         /// Gets the bitrate limits for the given audio codec, sample rate and mixdown.
         /// </summary>

win/CS/HandBrake.ApplicationServices/Interop/HandBrakeInstance.cs

@@ -82,6 +82,11 @@ public class HandBrakeInstance : IHandBrakeInstance, IDisposable
         /// </summary>
         private JsonScanObject titles;
 
+        /// <summary>
+        /// The raw JSON for the titles list.
+        /// </summary>
+        private string titlesJson;
+
         /// <summary>
         /// The index of the default title.
         /// </summary>
@@ -153,6 +158,17 @@ public JsonScanObject Titles
             }
         }
 
+        /// <summary>
+        /// Gets the raw JSON for the list of titles on this instance.
+        /// </summary>
+        public string TitlesJson
+        {
+            get
+            {
+                return this.titlesJson;
+            }
+        }
+
         /// <summary>
         /// Gets the index of the default title.
         /// </summary>
@@ -360,7 +376,17 @@ public void StartEncode(JsonEncodeObject encodeObject)
             };
 
             string encode = JsonConvert.SerializeObject(encodeObject, Formatting.Indented, settings);
-            HBFunctions.hb_add_json(this.hbHandle, InteropUtilities.ToUtf8PtrFromString(encode));
+            this.StartEncode(encode);
+        }
+
+        /// <summary>
+        /// Starts an encode with the given job JSON.
+        /// </summary>
+        /// <param name="encodeJson">The JSON for the job to start.</param>
+        [HandleProcessCorruptedStateExceptions]
+        public void StartEncode(string encodeJson)
+        {
+            HBFunctions.hb_add_json(this.hbHandle, InteropUtilities.ToUtf8PtrFromString(encodeJson));
             HBFunctions.hb_start(this.hbHandle);
 
             this.encodePollTimer = new Timer();
@@ -497,16 +523,16 @@ private void PollScanProgress()
                 this.scanPollTimer.Stop();
 
                 var jsonMsg = HBFunctions.hb_get_title_set_json(this.hbHandle);
-                string scanJson = InteropUtilities.ToStringFromUtf8Ptr(jsonMsg);
-                this.log.LogMessage(scanJson, LogMessageType.Progress, LogLevel.Trace);
+                this.titlesJson = InteropUtilities.ToStringFromUtf8Ptr(jsonMsg);
+                this.log.LogMessage(this.titlesJson, LogMessageType.Progress, LogLevel.Trace);
 
                 if (string.IsNullOrEmpty(scanJson))
                 {
                     this.log.LogMessage("Scan Error: No Scan Data Returned.", LogMessageType.API, LogLevel.Error);
                 }
                 else
                 {
-                    this.titles = JsonConvert.DeserializeObject<JsonScanObject>(scanJson);
+                    this.titles = JsonConvert.DeserializeObject<JsonScanObject>(this.titlesJson);
                     if (this.titles != null)
                     {
                         this.featureTitle = this.titles.MainFeature;

win/CS/HandBrake.ApplicationServices/Interop/HbLib/HbFunctions.cs

@@ -201,6 +201,8 @@ public static class HBFunctions
         [DllImport("hb", EntryPoint = "hb_audio_samplerate_get_next", CallingConvention = CallingConvention.Cdecl)]
         public static extern IntPtr hb_audio_samplerate_get_next(IntPtr last);
 
+        [DllImport("hb", EntryPoint = "hb_audio_samplerate_find_closest", CallingConvention = CallingConvention.Cdecl)]
+	    public static extern int hb_audio_samplerate_find_closest(int samplerate, uint codec);
 
         [DllImport("hb", EntryPoint = "hb_audio_bitrate_get_best", CallingConvention = CallingConvention.Cdecl)]
         public static extern int hb_audio_bitrate_get_best(uint codec, int bitrate, int samplerate, int mixdown);