Added StreamPipeSource

Former-commit-id: 9903e333e6

FFMpegCore.Test/Resources/VideoLibrary.cs

@@ -17,6 +17,7 @@ public enum ImageType
     public static class VideoLibrary
     {
         public static readonly FileInfo LocalVideo = new FileInfo($".{Path.DirectorySeparatorChar}Resources{Path.DirectorySeparatorChar}input.mp4");
+        public static readonly FileInfo LocalVideoWebm = new FileInfo($".{Path.DirectorySeparatorChar}Resources{Path.DirectorySeparatorChar}input.webm");
         public static readonly FileInfo LocalVideoAudioOnly = new FileInfo($".{Path.DirectorySeparatorChar}Resources{Path.DirectorySeparatorChar}audio_only.mp4");
         public static readonly FileInfo LocalVideoNoAudio = new FileInfo($".{Path.DirectorySeparatorChar}Resources{Path.DirectorySeparatorChar}mute.mp4");
         public static readonly FileInfo LocalAudio = new FileInfo($".{Path.DirectorySeparatorChar}Resources{Path.DirectorySeparatorChar}audio.mp3");

FFMpegCore.Test/VideoTest.cs

@@ -63,6 +63,61 @@ public bool Convert(VideoType type, bool multithreaded = false, VideoSize size =
             }
         }
         
+        private void ConvertFromStreamPipe(VideoType type, ArgumentContainer container)
+        {
+            var output = Input.OutputLocation(type);
+
+            try
+            {
+                var input = VideoInfo.FromFileInfo(VideoLibrary.LocalVideoWebm);
+                using (var inputStream = System.IO.File.OpenRead(input.FullName))
+                {
+                    var pipeSource = new StreamPipeSource(inputStream);
+                    var arguments = new ArgumentContainer { new InputPipeArgument(pipeSource) };
+                    foreach (var arg in container)
+                    {
+                        arguments.Add(arg.Value);
+                    }
+                    arguments.Add(new OutputArgument(output));
+
+                    var scaling = container.Find<ScaleArgument>();
+
+                    Encoder.Convert(arguments);
+
+                    var outputVideo = new VideoInfo(output.FullName);
+
+                    Assert.IsTrue(File.Exists(output.FullName));
+                    Assert.IsTrue(Math.Abs((outputVideo.Duration - input.Duration).TotalMilliseconds) < 1000.0 / input.FrameRate);
+
+                    if (scaling == null)
+                    {
+                        Assert.AreEqual(outputVideo.Width, input.Width);
+                        Assert.AreEqual(outputVideo.Height, input.Height);
+                    }
+                    else
+                    {
+                        if (scaling.Value.Width != -1)
+                        {
+                            Assert.AreEqual(outputVideo.Width, scaling.Value.Width);
+                        }
+
+                        if (scaling.Value.Height != -1)
+                        {
+                            Assert.AreEqual(outputVideo.Height, scaling.Value.Height);
+                        }
+
+                        Assert.AreNotEqual(outputVideo.Width, input.Width);
+                        Assert.AreNotEqual(outputVideo.Height, input.Height);
+                    }
+                }
+            }
+            finally
+            {
+                if (File.Exists(output.FullName))
+                    File.Delete(output.FullName);
+            }
+        }
+
         public void Convert(VideoType type, ArgumentContainer container)
         {
             var output = Input.OutputLocation(type);
@@ -193,6 +248,13 @@ public void Video_ToMP4_Args_Pipe()
             ConvertFromPipe(VideoType.Mp4, container);
         }
 
+        [TestMethod]
+        public void Video_ToMP4_Args_StreamPipe()
+        {
+            var container = new ArgumentContainer { new VideoCodecArgument(VideoCodec.LibX264) };
+            ConvertFromStreamPipe(VideoType.Mp4, container);
+        }
+
         [TestMethod]
         public void Video_ToTS()
         {

FFMpegCore/FFMPEG/Pipes/StreamPipeSource.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FFMpegCore.FFMPEG.Pipes
+{
+    /// <summary>
+    /// Implementation of <see cref="IPipeSource"/> used for stream redirection
+    /// </summary>
+    public class StreamPipeSource : IPipeSource
+    {
+        public System.IO.Stream Source { get; private set; }
+        public int BlockSize { get; set; } = 4096;
+
+        public StreamPipeSource(System.IO.Stream stream)
+        {
+            Source = stream;
+        }
+
+        public void FlushData(System.IO.Stream pipe)
+        {
+            var buffer = new byte[BlockSize];
+            int read;
+            while ((read = Source.Read(buffer, 0, buffer.Length)) != 0)
+            {
+                pipe.Write(buffer, 0, read);
+            }
+        }
+
+        public async Task FlushDataAsync(System.IO.Stream pipe)
+        {
+            var buffer = new byte[BlockSize];
+            int read;
+            while ((read = await Source.ReadAsync(buffer, 0, buffer.Length)) != 0)
+            {
+                await pipe.WriteAsync(buffer, 0, read);
+            }
+        }
+
+        public string GetFormat()
+        {
+            return "";
+        }
+    }
+}