From 92fff3b61228b4d025d740ccbb37dc64c7006da9 Mon Sep 17 00:00:00 2001
From: Carlos Fonseca M <carlfm01@hotmail.com>
Date: Sat, 18 Jan 2020 12:41:35 +0100
Subject: [PATCH] Update WPF example for multistream API

---
 net_framework/DeepSpeechWPF/App.xaml.cs             | 12 ++++++------
 .../DeepSpeechWPF/ViewModels/MainWindowViewModel.cs | 13 ++++++++++---
 2 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/net_framework/DeepSpeechWPF/App.xaml.cs b/net_framework/DeepSpeechWPF/App.xaml.cs
index 67dad8e..95c550a 100644
--- a/net_framework/DeepSpeechWPF/App.xaml.cs
+++ b/net_framework/DeepSpeechWPF/App.xaml.cs
@@ -18,20 +18,20 @@ namespace DeepSpeechWPF
 
             const int BEAM_WIDTH = 500;
 
-            //Register instance of DeepSpeech
-            DeepSpeechClient.DeepSpeech deepSpeechClient = new DeepSpeechClient.DeepSpeech();
             try
             {
-                deepSpeechClient.CreateModel("output_graph.pbmm", BEAM_WIDTH);
+                //Register instance of DeepSpeech
+                DeepSpeechClient.DeepSpeech deepSpeechClient =
+                    new DeepSpeechClient.DeepSpeech("output_graph.pbmm", BEAM_WIDTH);
+
+                SimpleIoc.Default.Register<IDeepSpeech>(() => deepSpeechClient);
+                SimpleIoc.Default.Register<MainWindowViewModel>();
             }
             catch (System.Exception ex)
             {
                 MessageBox.Show(ex.Message);
                 Current.Shutdown();
             }
-            
-            SimpleIoc.Default.Register<IDeepSpeech>(() => deepSpeechClient);
-            SimpleIoc.Default.Register<MainWindowViewModel>();
         }
 
         protected override void OnExit(ExitEventArgs e)
diff --git a/net_framework/DeepSpeechWPF/ViewModels/MainWindowViewModel.cs b/net_framework/DeepSpeechWPF/ViewModels/MainWindowViewModel.cs
index 81b33ce..207e209 100644
--- a/net_framework/DeepSpeechWPF/ViewModels/MainWindowViewModel.cs
+++ b/net_framework/DeepSpeechWPF/ViewModels/MainWindowViewModel.cs
@@ -4,6 +4,7 @@ using CSCore.CoreAudioAPI;
 using CSCore.SoundIn;
 using CSCore.Streams;
 using DeepSpeechClient.Interfaces;
+using DeepSpeechClient.Models;
 using GalaSoft.MvvmLight.CommandWpf;
 using Microsoft.Win32;
 using System;
@@ -58,6 +59,12 @@ namespace DeepSpeech.WPF.ViewModels
         #endregion
 
         #region Streaming
+
+        /// <summary>
+        /// Stream used to feed data into the acoustic model.
+        /// </summary>
+        private DeepSpeechStream _sttStream;
+
         /// <summary>
         /// Records the audio of the selected device.
         /// </summary>
@@ -308,7 +315,7 @@ namespace DeepSpeech.WPF.ViewModels
                 if (_bufferQueue.TryDequeue(out short[] buffer))
                 {
                     StreamingIsBusy = true;
-                    _sttClient.FeedAudioContent(buffer, Convert.ToUInt32(buffer.Length));
+                    _sttClient.FeedAudioContent(_sttStream, buffer, Convert.ToUInt32(buffer.Length));
                     StreamingIsBusy = false;
                 }
             }
@@ -386,7 +393,7 @@ namespace DeepSpeech.WPF.ViewModels
             {
                 await Task.Delay(90);
             }
-            Transcription = _sttClient.FinishStream();
+            Transcription = _sttClient.FinishStream(_sttStream);
             EnableStartRecord = true;
         }
 
@@ -395,7 +402,7 @@ namespace DeepSpeech.WPF.ViewModels
         /// </summary>
         private void StartRecording()
         {
-            _sttClient.CreateStream();
+            _sttStream =_sttClient.CreateStream();
             _audioCapture.Start();
             EnableStartRecord = false;
             EnableStopRecord = true;