1 /*
2 * The contents of this file are subject to the Mozilla Public
3 * License Version 1.1 (the "License"); you may not use this file
4 * except in compliance with the License. You may obtain a copy of
5 * the License at http://www.mozilla.org/MPL/
6 *
7 * Software distributed under the License is distributed on an "AS
8 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
9 * implied. See the License for the specific language governing
10 * rights and limitations under the License.
11 *
12 * The Original Code is MPEG4IP.
13 *
14 * The Initial Developer of the Original Code is Cisco Systems Inc.
15 * Portions created by Cisco Systems Inc. are
16 * Copyright (C) Cisco Systems Inc. 2001. All Rights Reserved.
17 *
18 * Contributor(s):
19 * Dave Mackie dmackie@cisco.com
20 */
21
22 #include "mp4common.h"
23
MP4Mp4aAtom()24 MP4Mp4aAtom::MP4Mp4aAtom()
25 : MP4Atom("mp4a")
26 {
27 AddReserved("reserved1", 6); /* 0 */
28
29 AddProperty( /* 1 */
30 new MP4Integer16Property("dataReferenceIndex"));
31
32 AddReserved("reserved2", 16); /* 2 */
33
34 AddProperty( /* 3 */
35 new MP4Integer16Property("timeScale"));
36
37 AddReserved("reserved3", 2); /* 4 */
38
39 ExpectChildAtom("esds", Required, OnlyOne);
40 }
41
Generate()42 void MP4Mp4aAtom::Generate()
43 {
44 MP4Atom::Generate();
45
46 ((MP4Integer16Property*)m_pProperties[1])->SetValue(1);
47
48 // property reserved2 has non-zero fixed values
49 static u_int8_t reserved2[16] = {
50 0x00, 0x00, 0x00, 0x00,
51 0x00, 0x00, 0x00, 0x00,
52 0x00, 0x02, 0x00, 0x10,
53 0x00, 0x00, 0x00, 0x00,
54 };
55 m_pProperties[2]->SetReadOnly(false);
56 ((MP4BytesProperty*)m_pProperties[2])->
57 SetValue(reserved2, sizeof(reserved2));
58 m_pProperties[2]->SetReadOnly(true);
59 }
60