-
Notifications
You must be signed in to change notification settings - Fork 3
/
MPfmWaveFormView.cs
356 lines (311 loc) · 11.4 KB
/
MPfmWaveFormView.cs
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
// Copyright © 2011-2013 Yanick Castonguay
//
// This file is part of MPfm.
//
// MPfm is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// MPfm is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with MPfm. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using MPfm.Core;
using MPfm.MVP.Bootstrap;
using MPfm.MVP.Navigation;
using MPfm.Sound;
using MPfm.Sound.AudioFiles;
using MPfm.Sound.PeakFiles;
using MonoTouch.CoreGraphics;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
using MPfm.iOS.Helpers;
using MPfm.iOS.Managers;
using MPfm.iOS.Managers.Events;
using MPfm.iOS.Classes.Objects;
namespace MPfm.iOS.Classes.Controls
{
[Register("MPfmWaveFormView")]
public class MPfmWaveFormView : UIView
{
private WaveFormCacheManager _waveFormCacheManager;
private string _status = "Initial status";
private bool _isLoading = false;
private bool _isGeneratingImageCache = false;
private UIImage _imageCache = null;
private float _cursorX;
private float _secondaryCursorX;
private CGColor _colorGradient1 = GlobalTheme.BackgroundColor.CGColor;
private CGColor _colorGradient2 = GlobalTheme.BackgroundColor.CGColor;
public WaveFormDisplayType DisplayType { get; set; }
private long _position;
public long Position
{
get
{
return _position;
}
set
{
_position = value;
// Don't bother if a peak file is loading
if(_isLoading || _imageCache == null)
return;
// Invalidate cursor
RectangleF rectCursor = new RectangleF(_cursorX - 5, 0, 10, Frame.Height);
SetNeedsDisplayInRect(rectCursor);
}
}
private long _secondaryPosition;
public long SecondaryPosition
{
get
{
return _secondaryPosition;
}
set
{
_secondaryPosition = value;
// Don't bother if a peak file is loading
if(_isLoading)
return;
// Invalidate cursor
RectangleF rectCursor = new RectangleF(_secondaryCursorX - 5, 0, 10, Frame.Height);
SetNeedsDisplayInRect(rectCursor);
}
}
private long _length;
public long Length
{
get
{
return _length;
}
set
{
_length = value;
}
}
private float _scrollX;
public float ScrollX
{
get
{
return _scrollX;
}
set
{
_scrollX = value;
}
}
private float _zoom = 1.0f;
public float Zoom
{
get
{
return _zoom;
}
set
{
_zoom = value;
}
}
public MPfmWaveFormView(IntPtr handle)
: base (handle)
{
Initialize();
}
public MPfmWaveFormView(RectangleF frame)
: base(frame)
{
Initialize();
}
private void Initialize()
{
Console.WriteLine("MPfmWaveFormView - Initialize");
this.BackgroundColor = UIColor.Black;
DisplayType = WaveFormDisplayType.Stereo;
_waveFormCacheManager = Bootstrapper.GetContainer().Resolve<WaveFormCacheManager>();
_waveFormCacheManager.GeneratePeakFileBegunEvent += HandleGeneratePeakFileBegunEvent;
_waveFormCacheManager.GeneratePeakFileProgressEvent += HandleGeneratePeakFileProgressEvent;
_waveFormCacheManager.GeneratePeakFileEndedEvent += HandleGeneratePeakFileEndedEvent;
_waveFormCacheManager.LoadedPeakFileSuccessfullyEvent += HandleLoadedPeakFileSuccessfullyEvent;
_waveFormCacheManager.GenerateWaveFormBitmapBegunEvent += HandleGenerateWaveFormBegunEvent;
_waveFormCacheManager.GenerateWaveFormBitmapEndedEvent += HandleGenerateWaveFormEndedEvent;
}
private void HandleGeneratePeakFileBegunEvent(object sender, GeneratePeakFileEventArgs e)
{
InvokeOnMainThread(() => {
//Console.WriteLine("MPfmWaveFormView - HandleGeneratePeakFileBegunEvent");
RefreshStatus("Generating wave form (0% done)");
});
}
private void HandleGeneratePeakFileProgressEvent(object sender, GeneratePeakFileEventArgs e)
{
InvokeOnMainThread(() => {
//Console.WriteLine("MPfmWaveFormView - HandleGeneratePeakFileProgressEvent (" + e.PercentageDone.ToString("0") + "% done)");
RefreshStatus("Generating wave form (" + e.PercentageDone.ToString("0") + "% done)");
});
}
private void HandleGeneratePeakFileEndedEvent(object sender, GeneratePeakFileEventArgs e)
{
InvokeOnMainThread(() => {
// TODO: Check if cancelled? This will not fire another LoadPeakFile if the peak file gen was cancelled.
Console.WriteLine("MPfmWaveFormView - HandleGeneratePeakFileEndedEvent - LoadPeakFile Cancelled: " + e.Cancelled.ToString() + " FilePath: " + e.AudioFilePath);
if(!e.Cancelled)
_waveFormCacheManager.LoadPeakFile(new AudioFile(e.AudioFilePath));
});
}
private void HandleLoadedPeakFileSuccessfullyEvent(object sender, LoadPeakFileEventArgs e)
{
InvokeOnMainThread(() => {
//Console.WriteLine("MPfmWaveFormView - HandleLoadedPeakFileSuccessfullyEvent");
_waveFormCacheManager.RequestBitmap(e.AudioFile.FilePath, WaveFormDisplayType.Stereo, Bounds, 1);
});
}
private void HandleGenerateWaveFormBegunEvent(object sender, GenerateWaveFormEventArgs e)
{
}
private void HandleGenerateWaveFormEndedEvent(object sender, GenerateWaveFormEventArgs e)
{
InvokeOnMainThread(() => {
_isLoading = false;
_imageCache = e.Image;
SetNeedsDisplay();
});
}
void HandleOnPeakFileProcessStarted(PeakFileStartedData data)
{
}
void HandleOnPeakFileProcessData(PeakFileProgressData data)
{
}
void HandleOnPeakFileProcessDone(PeakFileDoneData data)
{
}
public void FlushCache()
{
_waveFormCacheManager.FlushCache();
if(_imageCache != null)
{
_imageCache.Dispose();
_imageCache = null;
}
}
public void LoadPeakFile(AudioFile audioFile)
{
Console.WriteLine("WaveFormView - LoadPeakFile " + audioFile.FilePath);
RefreshStatus("Loading peak file...");
_waveFormCacheManager.LoadPeakFile(audioFile);
}
private void RefreshStatus(string status)
{
_isLoading = true;
_status = status;
SetNeedsDisplay();
}
private void DrawStatus(string status)
{
var context = UIGraphics.GetCurrentContext();
// Draw gradient background
CoreGraphicsHelper.FillGradient(context, Bounds, _colorGradient2, _colorGradient1);
// Draw status string
NSString str = new NSString(status);
context.SetFillColor(UIColor.White.CGColor);
float y = (Bounds.Height - 30) / 2;
str.DrawString(new RectangleF(0, y, Bounds.Width, 30), UIFont.FromName("HelveticaNeue", 12), UILineBreakMode.TailTruncation, UITextAlignment.Center);
return;
}
private void DrawWaveFormBitmap()
{
_isLoading = false;
int heightAvailable = (int)Frame.Height;
// Draw bitmap cache
var context = UIGraphics.GetCurrentContext();
context.DrawImage(Bounds, _imageCache.CGImage);
// Calculate position
float positionPercentage = (float)Position / (float)Length;
_cursorX = (positionPercentage * Bounds.Width) - ScrollX;
// Draw cursor line
context.SetStrokeColor(new CGColor(0, 0.5f, 1, 1));
context.SetLineWidth(1.0f);
context.StrokeLineSegments(new PointF[2] { new PointF(_cursorX, 0), new PointF(_cursorX, heightAvailable) });
// Check if a secondary cursor must be drawn
if(_secondaryPosition > 0)
{
// Calculate position
float secondaryPositionPercentage = (float)SecondaryPosition / (float)Length;
_secondaryCursorX = (secondaryPositionPercentage * Bounds.Width) - ScrollX;
// Draw cursor line
context.SetStrokeColor(new CGColor(1, 1, 1, 1));
context.SetLineWidth(1.0f);
context.StrokeLineSegments(new PointF[2] { new PointF(_secondaryCursorX, 0), new PointF(_secondaryCursorX, heightAvailable) });
}
}
private void GenerateWaveFormBitmap()
{
// Calculate available size
int widthAvailable = (int)Frame.Width;
int heightAvailable = (int)Frame.Height;
if(Zoom > 1)
{
widthAvailable = (int)(Frame.Width * Zoom);
}
var context = UIGraphics.GetCurrentContext();
if(!_isGeneratingImageCache)
{
RefreshStatus("Generating wave form image cache...");
_isGeneratingImageCache = true;
}
}
public override void Draw(RectangleF rect)
{
base.Draw(rect);
if(_isLoading)
{
DrawStatus(_status);
}
else if (_imageCache != null)
{
DrawWaveFormBitmap();
}
else
{
var context = UIGraphics.GetCurrentContext();
CoreGraphicsHelper.FillRect(context, Bounds, _colorGradient1);
}
}
}
/// <summary>
/// Defines the wave form display type.
/// </summary>
public enum WaveFormDisplayType
{
/// <summary>
/// Left channel.
/// </summary>
LeftChannel = 0,
/// <summary>
/// Right channel.
/// </summary>
RightChannel = 1,
/// <summary>
/// Stereo (left and right channels).
/// </summary>
Stereo = 2,
/// <summary>
/// Mix (mix of left/right channels).
/// </summary>
Mix = 3
}
}