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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="RemoteInstance.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// An Implementation of IEncodeInstance that works with a remote process rather than locally in-process.
// This class is effectively just a shim.
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrakeWPF.Instance
{
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Timers;
using HandBrake.Interop.Interop.EventArgs;
using HandBrake.Interop.Interop.Interfaces;
using HandBrake.Interop.Interop.Json.Encode;
using HandBrake.Interop.Interop.Json.State;
using HandBrakeWPF.Instance.Model;
using HandBrakeWPF.Utilities;
using Newtonsoft.Json;
/*
* TODO:
* - Handle Worker Shutdown.
* - Worker Registration Process
* - Port in Use Handling
* - Setting Configuration (libdvdnav)
* - Setting No Hardware mode
*/
public class RemoteInstance : HttpRequestBase, IEncodeInstance, IDisposable
{
private const double EncodePollIntervalMs = 1000;
private Process workerProcess;
private Timer encodePollTimer;
public RemoteInstance(int port)
{
this.port = port;
this.serverUrl = string.Format("http://127.0.0.1:{0}/", this.port);
}
public event EventHandler<EncodeCompletedEventArgs> EncodeCompleted;
public event EventHandler<EncodeProgressEventArgs> EncodeProgress;
public async void PauseEncode()
{
await this.MakeHttpGetRequest("PauseEncode");
this.StopPollingProgress();
}
public async void ResumeEncode()
{
await this.MakeHttpGetRequest("ResumeEncode");
this.MonitorEncodeProgress();
}
public async void StartEncode(JsonEncodeObject jobToStart)
{
JsonSerializerSettings settings = new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore };
string job = JsonConvert.SerializeObject(jobToStart, Formatting.None, settings);
await this.MakeHttpJsonPostRequest("StartEncode", job);
this.MonitorEncodeProgress();
}
public async void StopEncode()
{
await this.MakeHttpGetRequest("StopEncode");
this.StopPollingProgress();
}
public JsonState GetEncodeProgress()
{
Task<ServerResponse> response = this.MakeHttpGetRequest("PollEncodeProgress");
response.Wait();
if (!response.Result.WasSuccessful)
{
return null;
}
string statusJson = response.Result?.JsonResponse;
JsonState state = JsonConvert.DeserializeObject<JsonState>(statusJson);
return state;
}
public void Initialize(int verbosityLvl, bool noHardwareMode)
{
this.StartServer(verbosityLvl, noHardwareMode);
}
public void Dispose()
{
this.client?.Dispose();
this.workerProcess?.Dispose();
this.StopEncode();
this.StopServer();
}
private void StartServer(int verbosityLvl, bool noHardwareMode)
{
if (this.workerProcess == null || this.workerProcess.HasExited)
{
this.workerProcess = new Process();
this.workerProcess.StartInfo =
new ProcessStartInfo("HandBrake.Worker.exe", string.Format("--port={0} --verbosity={1}", this.port, verbosityLvl))
{
WindowStyle = ProcessWindowStyle.Normal
};
this.workerProcess.Start();
this.workerProcess.Exited += this.WorkerProcess_Exited;
Debug.WriteLine("Worker Process Started. PID = {0}", this.workerProcess.Id);
}
}
private void MonitorEncodeProgress()
{
this.encodePollTimer = new Timer();
this.encodePollTimer.Interval = EncodePollIntervalMs;
this.encodePollTimer.Elapsed += (o, e) =>
{
try
{
this.PollEncodeProgress();
}
catch (Exception exc)
{
Debug.WriteLine(exc);
}
};
this.encodePollTimer.Start();
}
private void StopPollingProgress()
{
this.PollEncodeProgress(); // Get the final progress state.
this.encodePollTimer?.Stop();
}
private void WorkerProcess_Exited(object sender, EventArgs e)
{
Debug.WriteLine("Worker Process has exited");
}
private void StopServer()
{
if (this.workerProcess != null && !this.workerProcess.HasExited)
{
this.workerProcess.Kill();
}
}
private async void PollEncodeProgress()
{
ServerResponse response = null;
try
{
response = await this.MakeHttpGetRequest("PollEncodeProgress");
}
catch (Exception e)
{
if (this.encodePollTimer != null)
{
this.encodePollTimer.Stop();
}
}
if (response == null || !response.WasSuccessful)
{
return;
}
string statusJson = response.JsonResponse;
JsonState state = JsonConvert.DeserializeObject<JsonState>(statusJson);
TaskState taskState = state != null ? TaskState.FromRepositoryValue(state.State) : null;
if (taskState != null && (taskState == TaskState.Working || taskState == TaskState.Muxing || taskState == TaskState.Searching))
{
if (this.EncodeProgress != null)
{
var progressEventArgs = new EncodeProgressEventArgs(
fractionComplete: state.Working.Progress,
currentFrameRate: state.Working.Rate,
averageFrameRate: state.Working.RateAvg,
estimatedTimeLeft: TimeSpan.FromSeconds(state.Working.ETASeconds),
passId: state.Working.PassID,
pass: state.Working.Pass,
passCount: state.Working.PassCount,
stateCode: taskState.Code);
this.EncodeProgress(this, progressEventArgs);
}
}
else if (taskState != null && taskState == TaskState.WorkDone)
{
this.encodePollTimer.Stop();
this.EncodeCompleted?.Invoke(sender: this, e: new EncodeCompletedEventArgs(state.WorkDone.Error != 0));
}
}
}
}
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