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
|
/*****************************************************************
|
| AP4 - Object Descriptor
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL 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 2, or (at your option)
| any later version.
|
| Bento4|GPL 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 Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4ObjectDescriptor.h"
#include "Ap4DescriptorFactory.h"
#include "Ap4Utils.h"
#include "Ap4Atom.h"
/*----------------------------------------------------------------------
| dynamic cast support
+---------------------------------------------------------------------*/
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_ObjectDescriptor)
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_DescriptorUpdateCommand)
/*----------------------------------------------------------------------
| AP4_ObjectDescriptor::AP4_ObjectDescriptor
+---------------------------------------------------------------------*/
AP4_ObjectDescriptor::AP4_ObjectDescriptor(AP4_UI08 tag,
AP4_Size header_size,
AP4_Size payload_size) :
AP4_Descriptor(tag, header_size, payload_size),
m_ObjectDescriptorId(0),
m_UrlFlag(false)
{
}
/*----------------------------------------------------------------------
| AP4_ObjectDescriptor::AP4_ObjectDescriptor
+---------------------------------------------------------------------*/
AP4_ObjectDescriptor::AP4_ObjectDescriptor(AP4_UI08 tag, AP4_UI16 id) :
AP4_Descriptor(tag, 3, 2),
m_ObjectDescriptorId(id),
m_UrlFlag(false)
{
}
/*----------------------------------------------------------------------
| AP4_ObjectDescriptor::AP4_ObjectDescriptor
+---------------------------------------------------------------------*/
AP4_ObjectDescriptor::AP4_ObjectDescriptor(AP4_ByteStream& stream,
AP4_UI08 tag,
AP4_Size header_size,
AP4_Size payload_size) :
AP4_Descriptor(tag, header_size, payload_size)
{
AP4_Position start;
stream.Tell(start);
// read descriptor fields
unsigned short bits;
stream.ReadUI16(bits);
m_ObjectDescriptorId = (bits>>6);
m_UrlFlag = ((bits&(1<<5))!=0);
if (m_UrlFlag) {
unsigned char url_length;
stream.ReadUI08(url_length);
char url[256];
stream.Read(url, url_length);
url[url_length] = '\0';
m_Url = url;
}
// read other descriptors
AP4_Position offset;
stream.Tell(offset);
AP4_SubStream* substream = new AP4_SubStream(stream, offset,
payload_size-AP4_Size(offset-start));
AP4_Descriptor* descriptor = NULL;
while (AP4_DescriptorFactory::CreateDescriptorFromStream(*substream,
descriptor)
== AP4_SUCCESS) {
m_SubDescriptors.Add(descriptor);
}
substream->Release();
}
/*----------------------------------------------------------------------
| AP4_ObjectDescriptor::~AP4_ObjectDescriptor
+---------------------------------------------------------------------*/
AP4_ObjectDescriptor::~AP4_ObjectDescriptor()
{
m_SubDescriptors.DeleteReferences();
}
/*----------------------------------------------------------------------
| AP4_ObjectDescriptor::FindSubDescriptor
+---------------------------------------------------------------------*/
AP4_Descriptor*
AP4_ObjectDescriptor::FindSubDescriptor(AP4_UI08 tag) const
{
AP4_Descriptor* descriptor = NULL;
AP4_Result result = m_SubDescriptors.Find(AP4_DescriptorFinder(tag), descriptor);
if (AP4_FAILED(result)) return NULL;
return descriptor;
}
/*----------------------------------------------------------------------
| AP4_ObjectDescriptor::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_ObjectDescriptor::WriteFields(AP4_ByteStream& stream)
{
AP4_Result result;
// id and flag
unsigned short bits = (m_ObjectDescriptorId<<6)|(m_UrlFlag?(1<<5):0)|0x1F;
result = stream.WriteUI16(bits);
if (AP4_FAILED(result)) return result;
// optional url
if (m_UrlFlag) {
stream.WriteUI08((AP4_UI08)m_Url.GetLength());
stream.Write(m_Url.GetChars(), m_Url.GetLength());
}
// write the sub descriptors
m_SubDescriptors.Apply(AP4_DescriptorListWriter(stream));
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_ObjectDescriptor::Inspect
+---------------------------------------------------------------------*/
AP4_Result
AP4_ObjectDescriptor::Inspect(AP4_AtomInspector& inspector)
{
inspector.StartDescriptor("ObjectDescriptor", GetHeaderSize(), GetSize());
inspector.AddField("id", m_ObjectDescriptorId);
if (m_UrlFlag) {
inspector.AddField("url", m_Url.GetChars());
}
// inspect children
m_SubDescriptors.Apply(AP4_DescriptorListInspector(inspector));
inspector.EndDescriptor();
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_ObjectDescriptor::AddSubDescriptor
+---------------------------------------------------------------------*/
AP4_Result
AP4_ObjectDescriptor::AddSubDescriptor(AP4_Descriptor* descriptor)
{
m_SubDescriptors.Add(descriptor);
m_PayloadSize += descriptor->GetSize();
// check that the header is still large enough to encode the payload
// length
unsigned int min_header_size = MinHeaderSize(m_PayloadSize);
if (min_header_size > m_HeaderSize) m_HeaderSize = min_header_size;
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_InitialObjectDescriptor::AP4_InitialObjectDescriptor
+---------------------------------------------------------------------*/
AP4_InitialObjectDescriptor::AP4_InitialObjectDescriptor(
AP4_UI08 tag, // should be AP4_DESCRIPTOR_TAG_IOD or AP4_DESCRIPTOR_TAG_MP4_IOD
AP4_UI16 object_descriptor_id,
bool include_inline_profile_level,
AP4_UI08 od_profile_level_indication,
AP4_UI08 scene_profile_level_indication,
AP4_UI08 audio_profile_level_indication,
AP4_UI08 visual_profile_level_indication,
AP4_UI08 graphics_profile_level_indication) :
AP4_ObjectDescriptor(tag, object_descriptor_id),
m_IncludeInlineProfileLevelFlag(include_inline_profile_level),
m_OdProfileLevelIndication(od_profile_level_indication),
m_SceneProfileLevelIndication(scene_profile_level_indication),
m_AudioProfileLevelIndication(audio_profile_level_indication),
m_VisualProfileLevelIndication(visual_profile_level_indication),
m_GraphicsProfileLevelIndication(graphics_profile_level_indication)
{
m_PayloadSize = 7;
}
/*----------------------------------------------------------------------
| AP4_InitialObjectDescriptor::AP4_InitialObjectDescriptor
+---------------------------------------------------------------------*/
AP4_InitialObjectDescriptor::AP4_InitialObjectDescriptor(AP4_ByteStream& stream,
AP4_UI08 tag,
AP4_Size header_size,
AP4_Size payload_size) :
AP4_ObjectDescriptor(tag, header_size, payload_size),
m_OdProfileLevelIndication(0),
m_SceneProfileLevelIndication(0),
m_AudioProfileLevelIndication(0),
m_VisualProfileLevelIndication(0),
m_GraphicsProfileLevelIndication(0)
{
AP4_Position start;
stream.Tell(start);
// read descriptor fields
unsigned short bits;
stream.ReadUI16(bits);
m_ObjectDescriptorId = (bits>>6);
m_UrlFlag = ((bits&(1<<5))!=0);
m_IncludeInlineProfileLevelFlag = ((bits&(1<<4))!=0);
if (m_UrlFlag) {
unsigned char url_length;
stream.ReadUI08(url_length);
char url[256];
stream.Read(url, url_length);
url[url_length] = '\0';
m_Url = url;
} else {
stream.ReadUI08(m_OdProfileLevelIndication);
stream.ReadUI08(m_SceneProfileLevelIndication);
stream.ReadUI08(m_AudioProfileLevelIndication);
stream.ReadUI08(m_VisualProfileLevelIndication);
stream.ReadUI08(m_GraphicsProfileLevelIndication);
}
// read other descriptors
AP4_Position offset;
stream.Tell(offset);
AP4_SubStream* substream = new AP4_SubStream(stream, offset,
payload_size-AP4_Size(offset-start));
AP4_Descriptor* descriptor = NULL;
while (AP4_DescriptorFactory::CreateDescriptorFromStream(*substream,
descriptor)
== AP4_SUCCESS) {
m_SubDescriptors.Add(descriptor);
}
substream->Release();
}
/*----------------------------------------------------------------------
| AP4_InitialObjectDescriptor::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_InitialObjectDescriptor::WriteFields(AP4_ByteStream& stream)
{
AP4_Result result;
// id and flags
unsigned short bits = (m_ObjectDescriptorId<<6) |
(m_UrlFlag?(1<<5):0) |
(m_IncludeInlineProfileLevelFlag?(1<<4):0)|
0xF;
result = stream.WriteUI16(bits);
if (AP4_FAILED(result)) return result;
// optional url
if (m_UrlFlag) {
stream.WriteUI08((AP4_UI08)m_Url.GetLength());
stream.Write(m_Url.GetChars(), m_Url.GetLength());
} else {
stream.WriteUI08(m_OdProfileLevelIndication);
stream.WriteUI08(m_SceneProfileLevelIndication);
stream.WriteUI08(m_AudioProfileLevelIndication);
stream.WriteUI08(m_VisualProfileLevelIndication);
stream.WriteUI08(m_GraphicsProfileLevelIndication);
}
// write the sub descriptors
m_SubDescriptors.Apply(AP4_DescriptorListWriter(stream));
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_InitialObjectDescriptor::Inspect
+---------------------------------------------------------------------*/
AP4_Result
AP4_InitialObjectDescriptor::Inspect(AP4_AtomInspector& inspector)
{
inspector.StartDescriptor("InitialObjectDescriptor", GetHeaderSize(), GetSize());
inspector.AddField("id", m_ObjectDescriptorId);
if (m_UrlFlag) {
inspector.AddField("url", m_Url.GetChars());
} else {
inspector.AddField("include inline profile level flag",
m_IncludeInlineProfileLevelFlag,
AP4_AtomInspector::HINT_BOOLEAN);
inspector.AddField("OD profile level", m_OdProfileLevelIndication, AP4_AtomInspector::HINT_HEX);
inspector.AddField("scene profile level", m_SceneProfileLevelIndication, AP4_AtomInspector::HINT_HEX);
inspector.AddField("audio profile level", m_AudioProfileLevelIndication, AP4_AtomInspector::HINT_HEX);
inspector.AddField("visual profile level", m_VisualProfileLevelIndication, AP4_AtomInspector::HINT_HEX);
inspector.AddField("graphics profile level", m_GraphicsProfileLevelIndication, AP4_AtomInspector::HINT_HEX);
}
// inspect children
m_SubDescriptors.Apply(AP4_DescriptorListInspector(inspector));
inspector.EndDescriptor();
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_DescriptorUpdateCommand::AP4_DescriptorUpdateCommand
+---------------------------------------------------------------------*/
AP4_DescriptorUpdateCommand::AP4_DescriptorUpdateCommand(AP4_UI08 tag) :
AP4_Command(tag, 2, 0)
{
}
/*----------------------------------------------------------------------
| AP4_DescriptorUpdateCommand::AP4_DescriptorUpdateCommand
+---------------------------------------------------------------------*/
AP4_DescriptorUpdateCommand::AP4_DescriptorUpdateCommand(
AP4_ByteStream& stream,
AP4_UI08 tag,
AP4_Size header_size,
AP4_Size payload_size) :
AP4_Command(tag, header_size, payload_size)
{
// read the descriptors
AP4_Position offset;
stream.Tell(offset);
AP4_SubStream* substream = new AP4_SubStream(stream, offset,
payload_size);
AP4_Descriptor* descriptor = NULL;
while (AP4_DescriptorFactory::CreateDescriptorFromStream(*substream, descriptor) == AP4_SUCCESS) {
m_Descriptors.Add(descriptor);
}
substream->Release();
}
/*----------------------------------------------------------------------
| AP4_DescriptorUpdateCommand::~AP4_DescriptorUpdateCommand
+---------------------------------------------------------------------*/
AP4_DescriptorUpdateCommand::~AP4_DescriptorUpdateCommand()
{
m_Descriptors.DeleteReferences();
}
/*----------------------------------------------------------------------
| AP4_DescriptorUpdateCommand::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_DescriptorUpdateCommand::WriteFields(AP4_ByteStream& stream)
{
// write the descriptors
m_Descriptors.Apply(AP4_DescriptorListWriter(stream));
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_DescriptorUpdateCommand::Inspect
+---------------------------------------------------------------------*/
AP4_Result
AP4_DescriptorUpdateCommand::Inspect(AP4_AtomInspector& inspector)
{
switch (GetTag()) {
case AP4_COMMAND_TAG_OBJECT_DESCRIPTOR_UPDATE:
inspector.StartDescriptor("ObjectDescriptorUpdate", GetHeaderSize(), GetSize());
break;
case AP4_COMMAND_TAG_IPMP_DESCRIPTOR_UPDATE:
inspector.StartDescriptor("IPMP_DescriptorUpdate", GetHeaderSize(), GetSize());
break;
default:
inspector.StartDescriptor("DescriptorUpdate", GetHeaderSize(), GetSize());
break;
}
// inspect children
m_Descriptors.Apply(AP4_DescriptorListInspector(inspector));
inspector.EndDescriptor();
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_DescriptorUpdateCommand::AddDescriptor
+---------------------------------------------------------------------*/
AP4_Result
AP4_DescriptorUpdateCommand::AddDescriptor(AP4_Descriptor* descriptor)
{
m_Descriptors.Add(descriptor);
m_PayloadSize += descriptor->GetSize();
// check that the header is still large enough to encode the payload
// length
unsigned int min_header_size = MinHeaderSize(m_PayloadSize);
if (min_header_size > m_HeaderSize) m_HeaderSize = min_header_size;
return AP4_SUCCESS;
}
|
