summaryrefslogtreecommitdiffstats
path: root/win/C#/HandBrake.ApplicationServices/Services/Queue.cs
blob: 4c4beda08733c6c08973162d04149c7f4ab7f1c2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
/*  Queue.cs $
    This file is part of the HandBrake source code.
    Homepage: <http://handbrake.fr/>.
    It may be used under the terms of the GNU General Public License. */

namespace HandBrake.ApplicationServices.Services
{
    using System;
    using System.Collections.Generic;
    using System.Collections.ObjectModel;
    using System.Diagnostics;
    using System.IO;
    using System.Linq;
    using System.Threading;
    using System.Windows.Forms;
    using System.Xml.Serialization;

    using HandBrake.ApplicationServices.Functions;
    using HandBrake.ApplicationServices.Model;
    using HandBrake.ApplicationServices.Properties;
    using HandBrake.ApplicationServices.Services.Interfaces;

    /// <summary>
    /// The HandBrake Queue
    /// </summary>
    public class Queue : Encode, IQueue
    {
        /// <summary>
        /// The Queue Job List
        /// </summary>
        private readonly List<Job> queue = new List<Job>();

        /// <summary>
        /// An XML Serializer
        /// </summary>
        private static XmlSerializer serializer;

        /// <summary>
        /// The Next Job ID
        /// </summary>
        private int nextJobId;

        #region Events
        /// <summary>
        /// Fires when the Queue has started
        /// </summary>
        public event EventHandler QueueStarted;

        /// <summary>
        /// Fires when a job is Added, Removed or Re-Ordered.
        /// Should be used for triggering an update of the Queue Window.
        /// </summary>
        public event EventHandler QueueListChanged;

        /// <summary>
        /// Fires when a pause to the encode queue has been requested.
        /// </summary>
        public event EventHandler QueuePauseRequested;

        /// <summary>
        /// Fires when the entire encode queue has completed.
        /// </summary>
        public event EventHandler QueueCompleted;
        #endregion

        #region Properties
        /// <summary>
        /// Gets or sets the last encode that was processed.
        /// </summary>
        /// <returns></returns> 
        public Job LastEncode { get; set; }

        /// <summary>
        /// Gets a value indicating whether Request Pause
        /// </summary>
        public bool Paused { get; private set; }

        /// <summary>
        /// Gets the current state of the encode queue.
        /// </summary>
        public ReadOnlyCollection<Job> CurrentQueue
        {
            get { return this.queue.AsReadOnly(); }
        }

        /// <summary>
        /// Gets the number of items in the queue.
        /// </summary>
        public int Count
        {
            get { return this.queue.Count; }
        }
        #endregion

        #region Queue

        /// <summary>
        /// Gets and removes the next job in the queue.
        /// </summary>
        /// <returns>The job that was removed from the queue.</returns>
        private Job GetNextJob()
        {
            Job job = this.queue[0];
            this.LastEncode = job;
            this.Remove(0); // Remove the item which we are about to pass out.

            this.SaveQueue();

            return job;
        }

        /// <summary>
        /// Adds an item to the queue.
        /// </summary>
        /// <param name="query">
        /// The query that will be passed to the HandBrake CLI.
        /// </param>
        /// <param name="title">
        /// The title.
        /// </param>
        /// <param name="source">
        /// The location of the source video.
        /// </param>
        /// <param name="destination">
        /// The location where the encoded video will be.
        /// </param>
        /// <param name="customJob">
        /// Custom job
        /// </param>
        public void Add(string query, int title, string source, string destination, bool customJob)
        {
            Job newJob = new Job
                             {
                                 Id = this.nextJobId++,
                                 Title = title,
                                 Query = query,
                                 Source = source,
                                 Destination = destination,
                                 CustomQuery = customJob
                             };

            this.queue.Add(newJob);
            this.SaveQueue();

            if (this.QueueListChanged != null)
                this.QueueListChanged(this, new EventArgs());
        }

        /// <summary>
        /// Removes an item from the queue.
        /// </summary>
        /// <param name="index">The zero-based location of the job in the queue.</param>
        public void Remove(int index)
        {
            this.queue.RemoveAt(index);
            this.SaveQueue();

            if (this.QueueListChanged != null)
                this.QueueListChanged(this, new EventArgs());
        }

        /// <summary>
        /// Retrieve a job from the queue
        /// </summary>
        /// <param name="index">the job id</param>
        /// <returns>A job for the given index or blank job object</returns>
        public Job GetJob(int index)
        {
            if (this.queue.Count >= (index + 1))
                return this.queue[index];

            return new Job();
        }

        /// <summary>
        /// Moves an item up one position in the queue.
        /// </summary>
        /// <param name="index">The zero-based location of the job in the queue.</param>
        public void MoveUp(int index)
        {
            if (index > 0)
            {
                Job item = queue[index];

                queue.RemoveAt(index);
                queue.Insert((index - 1), item);
            }

            this.SaveQueue(); // Update the queue recovery file

            if (this.QueueListChanged != null)
                this.QueueListChanged(this, new EventArgs());
        }

        /// <summary>
        /// Moves an item down one position in the queue.
        /// </summary>
        /// <param name="index">The zero-based location of the job in the queue.</param>
        public void MoveDown(int index)
        {
            if (index < this.queue.Count - 1)
            {
                Job item = this.queue[index];

                this.queue.RemoveAt(index);
                this.queue.Insert((index + 1), item);
            }

            this.SaveQueue(); // Update the queue recovery file

            if (this.QueueListChanged != null)
                this.QueueListChanged(this, new EventArgs());
        }
        
        /// <summary>
        /// Save any updates to the main queue file.
        /// </summary>
        public void SaveQueue()
        {
            string file = Init.InstanceId == 0
                              ? "hb_queue_recovery.xml"
                              : string.Format("hb_queue_recovery{0}.xml", Init.InstanceId);
            this.WriteQueueStateToFile(file);
        }

        /// <summary>
        /// Writes the current state of the queue to a file.
        /// </summary>
        /// <param name="file">The location of the file to write the queue to.</param>
        public void WriteQueueStateToFile(string file)
        {
            string appDataPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"HandBrake\");
            string tempPath = file.Contains("hb_queue_recovery") ? appDataPath + file : file;

            try
            {
                using (FileStream strm = new FileStream(tempPath, FileMode.Create, FileAccess.Write))
                {
                    if (serializer == null)
                        serializer = new XmlSerializer(typeof(List<Job>));
                    serializer.Serialize(strm, queue);
                    strm.Close();
                    strm.Dispose();
                }
            }
            catch (Exception)
            {
                return;
            }
        }

        /// <summary>
        /// Writes the current state of the queue in the form of a batch (.bat) file.
        /// </summary>
        /// <param name="file">
        /// The location of the file to write the batch file to.
        /// </param>
        /// <returns>
        /// The write batch script to file.
        /// </returns>
        public bool WriteBatchScriptToFile(string file)
        {
            string queries = string.Empty;
            foreach (Job queueItem in this.queue)
            {
                string qItem = queueItem.Query;
                string fullQuery = '"' + Application.StartupPath + "\\HandBrakeCLI.exe" + '"' + qItem;

                if (queries == string.Empty)
                    queries = queries + fullQuery;
                else
                    queries = queries + " && " + fullQuery;
            }
            string strCmdLine = queries;

            if (file != string.Empty)
            {
                try
                {
                    // Create a StreamWriter and open the file, Write the batch file query to the file and 
                    // Close the stream
                    using (StreamWriter line = new StreamWriter(file))
                    {
                        line.WriteLine(strCmdLine);
                    }

                    return true;
                }
                catch (Exception exc)
                {
                    errorService.ShowError("Unable to write to the file. Please make sure that the location has the correct permissions for file writing.", exc.ToString());
                }
            }
            return false;
        }

        /// <summary>
        /// Reads a serialized XML file that represents a queue of encoding jobs.
        /// </summary>
        /// <param name="file">The location of the file to read the queue from.</param>
        public void LoadQueueFromFile(string file)
        {
            string appDataPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"HandBrake\");
            string tempPath = file.Contains("hb_queue_recovery") ? appDataPath + file : file;

            if (File.Exists(tempPath))
            {
                using (FileStream strm = new FileStream(tempPath, FileMode.Open, FileAccess.Read))
                {
                    if (strm.Length != 0)
                    {
                        if (serializer == null)
                            serializer = new XmlSerializer(typeof(List<Job>));

                        List<Job> list = serializer.Deserialize(strm) as List<Job>;

                        if (list != null)
                            foreach (Job item in list)
                                this.queue.Add(item);

                        if (!file.Contains("hb_queue_recovery"))
                            this.SaveQueue();

                        if (this.QueueListChanged != null)
                            this.QueueListChanged(this, new EventArgs());
                    }
                }
            }
        }

        /// <summary>
        /// Checks the current queue for an existing instance of the specified destination.
        /// </summary>
        /// <param name="destination">The destination of the encode.</param>
        /// <returns>Whether or not the supplied destination is already in the queue.</returns>
        public bool CheckForDestinationDuplicate(string destination)
        {
            return this.queue.Any(checkItem => checkItem.Destination.Contains(destination.Replace("\\\\", "\\")));
        }

        #endregion

        #region Encoding

        /// <summary>
        /// Starts encoding the first job in the queue and continues encoding until all jobs
        /// have been encoded.
        /// </summary>
        public void Start()
        {
            if (this.Count != 0)
            {
                if (this.Paused)
                    this.Paused = false;
                else
                {
                    this.Paused = false;
                    try
                    {
                        Thread theQueue = new Thread(this.StartQueue) { IsBackground = true };
                        theQueue.Start();

                        if (this.QueueStarted != null)
                            this.QueueStarted(this, new EventArgs());
                    }
                    catch (Exception exc)
                    {
                        errorService.ShowError("Unable to Start Queue", exc.ToString());
                    }
                }
            }
        }

        /// <summary>
        /// Requests a pause of the encode queue.
        /// </summary>
        public void Pause()
        {
            this.Paused = true;

            if (this.QueuePauseRequested != null)
                this.QueuePauseRequested(this, new EventArgs());
        }

        /// <summary>
        /// Run through all the jobs on the queue.
        /// </summary>
        /// <param name="state">Object State</param>
        private void StartQueue(object state)
        {
            // Run through each item on the queue
            while (this.Count != 0)
            {
                Job encJob = this.GetNextJob();
                this.SaveQueue(); // Update the queue recovery file

                Run(encJob, true);

                if (HbProcess == null)
                {
                    return;
                }
                HbProcess.WaitForExit();

                this.CopyLog(this.LastEncode.Destination);

                HbProcess.Close();
                HbProcess.Dispose();

                // Growl
                if (Init.GrowlEncode)
                    GrowlCommunicator.Notify("Encode Completed",
                                             "Put down that cocktail...\nyour Handbrake encode is done.");

                while (this.Paused) // Need to find a better way of doing this.
                {
                    Thread.Sleep(2000);
                }
            }
            this.LastEncode = new Job();

            if (this.QueueCompleted != null)
                this.QueueCompleted(this, new EventArgs());

            // After the encode is done, we may want to shutdown, suspend etc.
            Finish();
        }

        /// <summary>
        /// Perform an action after an encode. e.g a shutdown, standby, restart etc.
        /// </summary>
        private void Finish()
        {
            // Growl
            if (Init.GrowlQueue)
                GrowlCommunicator.Notify("Queue Completed", "Put down that cocktail...\nyour Handbrake queue is done.");

            // Do something whent he encode ends.
            switch (Init.CompletionOption)
            {
                case "Shutdown":
                    Process.Start("Shutdown", "-s -t 60");
                    break;
                case "Log Off":
                    Win32.ExitWindowsEx(0, 0);
                    break;
                case "Suspend":
                    Application.SetSuspendState(PowerState.Suspend, true, true);
                    break;
                case "Hibernate":
                    Application.SetSuspendState(PowerState.Hibernate, true, true);
                    break;
                case "Lock System":
                    Win32.LockWorkStation();
                    break;
                case "Quit HandBrake":
                    Application.Exit();
                    break;
                default:
                    break;
            }
        }

        #endregion
    }
}