Parser.java
9.55 KB
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
package com.upc.pbe.upcnews;
import java.net.MalformedURLException;
import java.util.ArrayList;
public class Parser
{
private static final String STARTWORD = "#EXTM3U";
private int fileType; //indicates if segment list or media list
private int currentLine;
private int currentSegment; //Cada segmento de cada calidad distinta
private int currentList; //Indice de cada recurso distinto
private boolean expectSegment = false;
private boolean expectList = false;
private Descarrega download;
Parser p = new Parser();
public Parser()
{
currentLine = 0;
currentSegment = 0;
currentList = 0;
fileType = -1;
/*
* -1 indicates UNDETERMINED
* 0 indicates SEGMENTS
* 1 indicates MEDIA
*/
download = new Descarrega();
}
public ArrayList<ParentList> parseFile(String file) throws ErrorException, WarningException, InfoException
{
ArrayList<ParentList> lists = new ArrayList<ParentList>();
lists.add(new ParentList(""));
lists.get(0).getLists().add(new List(-1));
String[] lines = file.split("\n");
for(int i = 0; i < lines.length; i++)
{
parseLine(lines[i],lists);
}
/*
* Esto contiene una lista de RECURSOS,
* que a su vez contiene una lista de CALIDADES.
* Si no te gusta mis VERSOS,
* te mando a la mierda sin SUTILIDADES.
*
* -- Imanol, hasta las cejas de cafeína.
*
* PD: En el último nivel de profundidad hay una lista de segmentos (debajo de calidades).
* Allí está el auténtico tesoro de Narnia.
*/
for(int i = 0; i < lists.size(); i++)
{
sortQuality(lists.get(i));
}
return lists;
}
private int searchID(String ID, ArrayList<ParentList> lists)
{
for(int i = 0; i < lists.size(); i++)
{
if(lists.get(i).getID().equals(ID))
{
return i;
}
}
return -1;
}
private void sortQuality(ParentList ppls)
{
ArrayList<List> lists = ppls.getLists();
if(lists.get(0).getQuality() == -1)
{
/*
* Se trata de ext-x-media's y estos no van por calidad
*/
return;
}
//BUBBLE-SORT!! (Me da un poco de verguenza, pero no quiero ponerme con quicksort...
while(true)
{
boolean sorted = true;
int i = 0;
do
{
if(lists.get(i).getQuality() < lists.get(i+1).getQuality())
{
sorted = false;
List aux = lists.get(i);
lists.set(i, lists.get(i+1));
lists.set(i+1, aux);
}
}while(++i != lists.size());
if(sorted)
{
break;
}
}
}
public void parseLine(String line, ArrayList<ParentList> lists) throws ErrorException, WarningException, InfoException
{
if(line.isEmpty())
{
currentLine++;
return;
}
else
{
ParentList ppls = lists.get(currentList); //VIVA HONDURAS!!!
List pls = ppls.getLists().get(ppls.getCurrentQuality());
if(!pls.getValidated())
{
if(line.equals(STARTWORD))
{
pls.setValidated(true);
}
else
{
throw new ErrorException("Playlist is not valid");
}
}
else
{
if(line.charAt(0) == '#')
{
if(line.substring(0,4).equals("#EXT"))
{
String[] extTag = line.split(":");
if(extTag[0].equals("#EXT-X-MEDIA-SEQUENCE"))
{
pls.setSequence(Integer.parseInt(extTag[1]));
}
else if(extTag[0].equals("#EXT-X-TARGETDURATION"))
{
pls.setMaxDuration(Integer.parseInt(extTag[1]));
}
else if(extTag[0].equals("#EXTINF"))
{
if(fileType == -1)
{
fileType = 0;
}
else if(fileType == 1)
{
throw new ErrorException("Invalid file, should contain Lists, " +
"but segments were found.");
}
if(expectSegment)
{
throw new ErrorException("Expected segment URI, got a different" +
"segment declaration");
}
String[] args = extTag[1].split(",");
int duration = Integer.parseInt(args[0]);
if (duration > pls.getMaxDuration())
{
throw new ErrorException("Segment " + currentSegment + " on line " + currentLine
+" exceeds max duration");
}
Segment s = new Segment(duration);
s.setName(args[1]);
pls.getSegments().add(s);
expectSegment = true;
}
else if(extTag[0].equals("#EXT-X-STREAM-INF"))
{
if(fileType == -1)
{
fileType = 1;
}
else if(fileType == 0)
{
throw new ErrorException("Invalid file, should contain Segments, " +
"but lists were found.");
}
expectList = true;
String programID = "";
int bandwidth = -1;
String[] arguments = extTag[1].split(",");
for(int i = 0; i < arguments.length; i++)
{
String[] argument = arguments[i].split("=");
if(argument[0].equals("PROGRAM-ID"))
{
programID = argument[1];
}
else if(argument[0].equals("BANDWIDTH"))
{
bandwidth = Integer.parseInt(argument[1]);
}
}
if(programID.equals("")|| bandwidth == -1)
{
throw new ErrorException("Playlist on line " + currentLine +
" has missing arguments");
}
if(!programID.equals(ppls.getID()))
{
if(ppls.getID().equals(""))
{
/*
* Este caso se da cuando no se ha creado ninguna lista.
* Hay que sustituir la por defecto por una lista real.
*/
lists.add(0,new ParentList(programID));
}
else
{
currentList = searchID(ppls.getID(), lists);
if(currentList == -1)
{
lists.add(new ParentList(programID));
currentList = lists.size()+1;
/*
* ppls y pls se actualizan en la siguiente linea procesada
*/
}
else
{
ppls = lists.get(currentList);
ppls.getLists().add(new List(bandwidth));
}
}
}
else
{
ppls.getLists().add(new List(bandwidth));
}
}
else if(extTag[0].equals("#EXT-X-MEDIA"))
{
if(fileType == -1)
{
fileType = 1;
}
else if(fileType == 0)
{
throw new ErrorException("Invalid file, should contain Segments, " +
"but lists were found.");
}
String Type = "";
String Name = "";
String GroupID = "";
String URI = "";
boolean Default = false;
String[] arguments = extTag[1].split(",");
for(int i = 0; i < arguments.length; i++)
{
String[] argument = arguments[i].split("=");
if(argument[0].equals("NAME"))
{
Name = argument[1];
}
else if(argument[0].equals("TYPE"))
{
Type = argument[1];
}
else if(argument[0].equals("GROUP-ID"))
{
GroupID = argument[1];
}
else if(argument[0].equals("DEFAULT"))
{
if(argument[1].equals("YES"))
{
Default = true;
}
else if(argument[1].equals("NO"))
{
Default = true;
}
else
{
throw new ErrorException("Invalid value for argument DEFAULT on line " +
currentLine);
}
}
else if(argument[0].equals("URI"))
{
URI = argument[1];
}
}
if(Type.equals("") || Name.equals("") || URI.equals("") || GroupID.equals(""))
{
throw new ErrorException("Playlist on line " + currentLine +
" has missing arguments");
}
ParentList pl = new ParentList(GroupID);
pl.setDefault(Default);
pl.setName(Name);
pl.setType(Type);
p.parseFile(download.doInBackground(URI));
/*
* Procesar URI y descargar listas recursivamente y añadir a la lista actual.
*
* TO-DO: Necesito la funcion de Marc
*/
List l = new List(-1);
if(!GroupID.equals(ppls.getID()))
{
if(ppls.getID().equals(""))
{
/*
* Este caso se da cuando no se ha creado ninguna lista.
* Hay que sustituir la por defecto por una lista real.
*/
lists.add(0,pl);
}
else
{
currentList = searchID(ppls.getID(), lists);
if(currentList == -1)
{
lists.add(pl);
currentList = lists.size()+1;
}
else
{
ppls = lists.get(currentList);
ppls.getLists().add(l);
}
}
}
else
{
ppls.getLists().add(l);
}
}
else if(extTag[0].equals("#EXT-X-ENDLIST"))
{
if(expectSegment || expectList)
{
throw new ErrorException("Unexpected end of list!");
}
//END REACHED, IGNORE AND LET THE FILE REACH EOF
}
else
{
currentLine++;
throw new WarningException("Tag not implemented: " + extTag[0]);
}
}
else
{
String comment = line.substring(1);
throw new InfoException("Comment on line " + currentLine++ + " " + comment);
}
}
else
{
if(expectSegment)
{
expectSegment = false;
try
{
pls.getSegments().get(currentSegment).setURL(line);
}
catch (MalformedURLException e)
{
throw new ErrorException(e.getMessage());
}
currentSegment++;
}
else if(expectList)
{
expectList = false;
p.parseFile(download.doInBackground(line));
}
else
{
throw new ErrorException("ERROR: Unexpected string " + line);
}
}
}
currentLine++;
}
}
}