1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
13 * express or implied.
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
17 */
18 /*********************************************************************************/
19 /* ------------------------------------------------------------------- */
20 /* MPEG-4 MediaHeaderAtom Class */
21 /* ------------------------------------------------------------------- */
22 /*********************************************************************************/
23 /*
24 This MediaHeaderAtom Class contains all the objects that declare information
25 about the media data within the stream.
26 */
27
28
29 #define IMPLEMENT_MediaHeaderAtom
30
31 #include "mediaheaderatom.h"
32 #include "atomutils.h"
33 #include "atomdefs.h"
34
35 // Stream-in ctor
MediaHeaderAtom(MP4_FF_FILE * fp,uint32 size,uint32 type)36 MediaHeaderAtom::MediaHeaderAtom(MP4_FF_FILE *fp, uint32 size, uint32 type)
37 : FullAtom(fp, size, type)
38 {
39 if (_success)
40 {
41
42 _pparent = NULL;
43 if (getVersion() == 1)
44 {
45 if (!AtomUtils::read64(fp, _creationTime64))
46 _success = false;
47 if (!AtomUtils::read64(fp, _modificationTime64))
48 _success = false;
49 if (!AtomUtils::read32(fp, _timeScale))
50 _success = false;
51 if (!AtomUtils::read64(fp, _duration64))
52 _success = false;
53 }
54 else
55 {
56 if (!AtomUtils::read32(fp, _creationTime))
57 _success = false;
58 if (!AtomUtils::read32(fp, _modificationTime))
59 _success = false;
60 if (!AtomUtils::read32(fp, _timeScale))
61 _success = false;
62 if (!AtomUtils::read32(fp, _duration))
63 _success = false;
64
65 }
66 if (!AtomUtils::read16(fp, _language))
67 _success = false;
68
69 // Read the last two bytes of reserved
70 if (!AtomUtils::read16(fp, _reserved))
71 _success = false;
72
73 if (!_success)
74 _mp4ErrorCode = READ_MEDIA_HEADER_ATOM_FAILED;
75 }
76 else
77 {
78 if (_mp4ErrorCode != ATOM_VERSION_NOT_SUPPORTED)
79 _mp4ErrorCode = READ_MEDIA_HEADER_ATOM_FAILED;
80 }
81 }
82
83
84 // Destructor
~MediaHeaderAtom()85 MediaHeaderAtom::~MediaHeaderAtom()
86 {
87 // Empty
88 }
89