From 73531b394742ab4d67098712109a0df7ae8247cb Mon Sep 17 00:00:00 2001
From: Thierry Fleury <thierry@codinlab.fr>
Date: Sun, 28 Feb 2021 14:50:55 +0100
Subject: [PATCH] Add InputDeviceArgument

---
 .../FFMpeg/Arguments/InputDeviceArgument.cs   | 26 +++++++++++++++++++
 FFMpegCore/FFMpeg/FFMpegArguments.cs          |  1 +
 2 files changed, 27 insertions(+)
 create mode 100644 FFMpegCore/FFMpeg/Arguments/InputDeviceArgument.cs

diff --git a/FFMpegCore/FFMpeg/Arguments/InputDeviceArgument.cs b/FFMpegCore/FFMpeg/Arguments/InputDeviceArgument.cs
new file mode 100644
index 0000000..f276bbb
--- /dev/null
+++ b/FFMpegCore/FFMpeg/Arguments/InputDeviceArgument.cs
@@ -0,0 +1,26 @@
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace FFMpegCore.Arguments
+{
+    /// <summary>
+    /// Represents an input device parameter
+    /// </summary>
+    public class InputDeviceArgument : IInputArgument
+    {
+        private readonly string Device;
+
+        public InputDeviceArgument(string device)
+        {
+            Device = device;
+        }
+
+        public Task During(CancellationToken cancellationToken = default) => Task.CompletedTask;
+
+        public void Pre() { }
+
+        public void Post() { }
+
+        public string Text => $"-i {Device}";
+    }
+}
diff --git a/FFMpegCore/FFMpeg/FFMpegArguments.cs b/FFMpegCore/FFMpeg/FFMpegArguments.cs
index 44e20d2..8d62db0 100644
--- a/FFMpegCore/FFMpeg/FFMpegArguments.cs
+++ b/FFMpegCore/FFMpeg/FFMpegArguments.cs
@@ -23,6 +23,7 @@ private FFMpegArguments() { }
         public static FFMpegArguments FromFileInput(FileInfo fileInfo, Action<FFMpegArgumentOptions>? addArguments = null) => new FFMpegArguments().WithInput(new InputArgument(fileInfo.FullName, false), addArguments);
         public static FFMpegArguments FromFileInput(IMediaAnalysis mediaAnalysis, Action<FFMpegArgumentOptions>? addArguments = null) => new FFMpegArguments().WithInput(new InputArgument(mediaAnalysis.Path, false), addArguments);
         public static FFMpegArguments FromUrlInput(Uri uri, Action<FFMpegArgumentOptions>? addArguments = null) => new FFMpegArguments().WithInput(new InputArgument(uri.AbsoluteUri, false), addArguments);
+        public static FFMpegArguments FromDeviceInput(string device, Action<FFMpegArgumentOptions>? addArguments = null) => new FFMpegArguments().WithInput(new InputDeviceArgument(device), addArguments);
         public static FFMpegArguments FromPipeInput(IPipeSource sourcePipe, Action<FFMpegArgumentOptions>? addArguments = null) => new FFMpegArguments().WithInput(new InputPipeArgument(sourcePipe), addArguments);