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
|
/*****************************************************************
|
| AP4 - dvcC Atoms
|
| Copyright 2002-2016 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 "Ap4DvccAtom.h"
#include "Ap4AtomFactory.h"
#include "Ap4Utils.h"
#include "Ap4Types.h"
#include "Ap4SampleDescription.h"
/*----------------------------------------------------------------------
| dynamic cast support
+---------------------------------------------------------------------*/
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_DvccAtom)
/*----------------------------------------------------------------------
| AP4_DvccAtom::GetProfileName
+---------------------------------------------------------------------*/
const char*
AP4_DvccAtom::GetProfileName(AP4_UI08 profile)
{
switch (profile) {
case AP4_DV_PROFILE_DVAV_PER: return "dvav.per";
case AP4_DV_PROFILE_DVAV_PEN: return "dvav.pen";
case AP4_DV_PROFILE_DVHE_DER: return "dvhe.der";
case AP4_DV_PROFILE_DVHE_DEN: return "dvhe.den";
case AP4_DV_PROFILE_DVHE_DTR: return "dvhe.dtr";
case AP4_DV_PROFILE_DVHE_STN: return "dvhe.stn";
case AP4_DV_PROFILE_DVHE_DTH: return "dvhe.dth";
case AP4_DV_PROFILE_DVHE_DTB: return "dvhr.dtb";
case AP4_DV_PROFILE_DVHE_ST : return "dvhe.st";
case AP4_DV_PROFILE_DVHE_SE : return "dvav.se";
}
return NULL;
}
/*----------------------------------------------------------------------
| AP4_DvccAtom::Create
+---------------------------------------------------------------------*/
AP4_DvccAtom*
AP4_DvccAtom::Create(AP4_Size size, AP4_ByteStream& stream)
{
if (size < AP4_ATOM_HEADER_SIZE+24) return NULL;
AP4_UI08 payload[24];
AP4_Result result = stream.Read(payload, 24);
if (AP4_FAILED(result)) return NULL;
return new AP4_DvccAtom(payload[0],
payload[1],
payload[2]>>1,
((payload[2]&1)<<5) | (payload[3]>>3),
(payload[3]&4) != 0,
(payload[3]&2) != 0,
(payload[3]&1) != 0,
payload[4]>>4);
}
/*----------------------------------------------------------------------
| AP4_DvccAtom::AP4_DvccAtom
+---------------------------------------------------------------------*/
AP4_DvccAtom::AP4_DvccAtom() :
AP4_Atom(AP4_ATOM_TYPE_DVCC, AP4_ATOM_HEADER_SIZE+24),
m_DvVersionMajor(0),
m_DvVersionMinor(0),
m_DvProfile(0),
m_DvLevel(0),
m_RpuPresentFlag(false),
m_ElPresentFlag(false),
m_BlPresentFlag(false),
m_DvBlSignalCompatibilityID(0)
{
}
/*----------------------------------------------------------------------
| AP4_DvccAtom::AP4_DvccAtom
+---------------------------------------------------------------------*/
AP4_DvccAtom::AP4_DvccAtom(AP4_UI08 dv_version_major,
AP4_UI08 dv_version_minor,
AP4_UI08 dv_profile,
AP4_UI08 dv_level,
bool rpu_present_flag,
bool el_present_flag,
bool bl_present_flag,
AP4_UI08 dv_bl_signal_compatibility_id) :
AP4_Atom((dv_profile>7) ? AP4_ATOM_TYPE_DVVC : AP4_ATOM_TYPE_DVCC, AP4_ATOM_HEADER_SIZE+24),
m_DvVersionMajor(dv_version_major),
m_DvVersionMinor(dv_version_minor),
m_DvProfile(dv_profile),
m_DvLevel(dv_level),
m_RpuPresentFlag(rpu_present_flag),
m_ElPresentFlag(el_present_flag),
m_BlPresentFlag(bl_present_flag),
m_DvBlSignalCompatibilityID(dv_bl_signal_compatibility_id)
{
}
/*----------------------------------------------------------------------
| AP4_DvccAtom::GetCodecString
+---------------------------------------------------------------------*/
AP4_Result
AP4_DvccAtom::GetCodecString(const char* parent_codec_string,
AP4_UI32 parent_format,
AP4_String& codec)
{
char workspace[64];
if (parent_format == AP4_ATOM_TYPE_DVAV ||
parent_format == AP4_ATOM_TYPE_DVA1 ||
parent_format == AP4_ATOM_TYPE_DVHE ||
parent_format == AP4_ATOM_TYPE_DVH1) {
/* Non backward-compatible */
char coding[5];
AP4_FormatFourChars(coding, parent_format);
AP4_FormatString(workspace,
sizeof(workspace),
"%s.%02d.%02d",
coding,
GetDvProfile(),
GetDvLevel());
codec = workspace;
} else {
/* Backward-compatible */
AP4_UI32 format = parent_format;
switch (parent_format) {
case AP4_ATOM_TYPE_AVC1:
format = AP4_ATOM_TYPE_DVA1;
break;
case AP4_ATOM_TYPE_AVC3:
format = AP4_ATOM_TYPE_DVAV;
break;
case AP4_ATOM_TYPE_HEV1:
format = AP4_ATOM_TYPE_DVHE;
break;
case AP4_ATOM_TYPE_HVC1:
format = AP4_ATOM_TYPE_DVH1;
break;
}
char coding[5];
AP4_FormatFourChars(coding, format);
AP4_FormatString(workspace,
sizeof(workspace),
"%s,%s.%02d.%02d",
parent_codec_string,
coding,
GetDvProfile(),
GetDvLevel());
codec = workspace;
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_DvccAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_DvccAtom::WriteFields(AP4_ByteStream& stream)
{
AP4_UI08 payload[24];
AP4_SetMemory(payload, 0, 24);
payload[0] = m_DvVersionMajor;
payload[1] = m_DvVersionMinor;
payload[2] = (m_DvProfile<<1) | ((m_DvLevel&0x20)>>5);
payload[3] = (m_DvLevel<<3) | (m_RpuPresentFlag?4:0) | (m_ElPresentFlag?2:0) | (m_BlPresentFlag?1:0);
payload[4] = m_DvBlSignalCompatibilityID<<4;
return stream.Write(payload, 24);
}
/*----------------------------------------------------------------------
| AP4_DvccAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_DvccAtom::InspectFields(AP4_AtomInspector& inspector)
{
inspector.AddField("dv_version_major", m_DvVersionMajor);
inspector.AddField("dv_version_minor", m_DvVersionMinor);
inspector.AddField("dv_profile", m_DvProfile);
const char* profile_name = GetProfileName(m_DvProfile);
if (profile_name) {
inspector.AddField("dv_profile_name", profile_name);
} else {
inspector.AddField("dv_profile_name", "unknown");
}
inspector.AddField("dv_level", m_DvLevel);
inspector.AddField("rpu_present_flag", m_RpuPresentFlag);
inspector.AddField("el_present_flag", m_ElPresentFlag);
inspector.AddField("bl_present_flag", m_BlPresentFlag);
inspector.AddField("dv_bl_signal_compatibility_id", m_DvBlSignalCompatibilityID);
return AP4_SUCCESS;
}
|
