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 This PVA_FF_HandlerAtom Class declares the nature of the media in the stream.
20 */
21
22 #define IMPLEMENT_HandlerAtom
23
24 #include "handleratom.h"
25 #include "a_atomdefs.h"
26 #include "atomutils.h"
27
28 // Constructor
PVA_FF_HandlerAtom(int32 handlerType,uint8 version,uint32 flags)29 PVA_FF_HandlerAtom::PVA_FF_HandlerAtom(int32 handlerType, uint8 version, uint32 flags)
30 : PVA_FF_FullAtom(HANDLER_ATOM, version, flags)
31 {
32 init(handlerType);
33 recomputeSize();
34 }
35
36 // Destructor
~PVA_FF_HandlerAtom()37 PVA_FF_HandlerAtom::~PVA_FF_HandlerAtom()
38 {
39 // Empty
40 }
41
42 void
init(int32 handlerType)43 PVA_FF_HandlerAtom::init(int32 handlerType)
44 {
45 switch (handlerType)
46 {
47 case MEDIA_TYPE_AUDIO:
48 _handlerType = MEDIA_TYPE_AUDIO;
49 _name = "SoundHandler";
50 break;
51 case MEDIA_TYPE_TEXT:
52 _handlerType = MEDIA_TYPE_TEXT;
53 _name = "TextHandler";
54 break;
55 case MEDIA_TYPE_VISUAL:
56 _handlerType = MEDIA_TYPE_VISUAL;
57 _name = "VideoHandler";
58 break;
59 default:
60 _handlerType = UNKNOWN_HANDLER; // Error condition!
61 _name = "UNKNOWNHandler";
62 break;
63 }
64
65 reserved1 = 0;
66 }
67
68 void
recomputeSize()69 PVA_FF_HandlerAtom::recomputeSize()
70 {
71 int32 size = getDefaultSize();
72 size += 4; // For 4 bytes of missed 0
73 size += 4; // For handlerType
74 size += 12; // For (8)[12] reserved
75 size += _name.get_size() + 1; // +1 for null termination
76
77 _size = size;
78
79 }
80
81 // Rendering the PVA_FF_Atom in proper format (bitlengths, etc.) to an ostream
82 bool
renderToFileStream(MP4_AUTHOR_FF_FILE_IO_WRAP * fp)83 PVA_FF_HandlerAtom::renderToFileStream(MP4_AUTHOR_FF_FILE_IO_WRAP *fp)
84 {
85 int32 rendered = 0; // Keep track of number of bytes rendered
86
87 // Render PVA_FF_Atom type and size
88 if (!renderAtomBaseMembers(fp))
89 {
90 return false;
91 }
92 rendered += getDefaultSize();
93
94 if (!PVA_FF_AtomUtils::render32(fp, 0))
95 {
96 return false;
97 }
98 rendered += 4;
99
100 if (!PVA_FF_AtomUtils::render32(fp, _handlerType))
101 {
102 return false;
103 }
104 rendered += 4;
105
106 uint8 reserved = 0;
107 for (int32 i = 0; i < 12; i++)
108 {
109 if (!PVA_FF_AtomUtils::render8(fp, reserved))
110 {
111 return false;
112 }
113 }
114 rendered += 12;
115
116 if (!PVA_FF_AtomUtils::renderNullTerminatedString(fp, _name))
117 {
118 return false;
119 }
120 rendered += _name.get_size() + 1;
121
122 return true;
123 }
124
125