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
|
/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_MEDIA_METADATA_H__
#define ANDROID_MEDIA_METADATA_H__
#include <sys/types.h>
#include <utils/Errors.h>
#include <utils/RefBase.h>
#include <utils/SortedVector.h>
namespace android {
class Parcel;
namespace media {
// Metadata is a class to build/serialize a set of metadata in a Parcel.
//
// This class should be kept in sync with android/media/Metadata.java.
// It provides all the metadata ids available and methods to build the
// header, add records and adjust the set size header field.
//
// Typical Usage:
// ==============
// Parcel p;
// media::Metadata data(&p);
//
// data.appendHeader();
// data.appendBool(Metadata::kPauseAvailable, true);
// ... more append ...
// data.updateLength();
//
class Metadata {
public:
typedef int32_t Type;
typedef SortedVector<Type> Filter;
static const Type kAny = 0;
// Playback capabilities.
static const Type kPauseAvailable = 1; // Boolean
static const Type kSeekBackwardAvailable = 2; // Boolean
static const Type kSeekForwardAvailable = 3; // Boolean
static const Type kSeekAvailable = 4; // Boolean
// Keep in sync with android/media/Metadata.java
static const Type kTitle = 5; // String
static const Type kComment = 6; // String
static const Type kCopyright = 7; // String
static const Type kAlbum = 8; // String
static const Type kArtist = 9; // String
static const Type kAuthor = 10; // String
static const Type kComposer = 11; // String
static const Type kGenre = 12; // String
static const Type kDate = 13; // Date
static const Type kDuration = 14; // Integer(millisec)
static const Type kCdTrackNum = 15; // Integer 1-based
static const Type kCdTrackMax = 16; // Integer
static const Type kRating = 17; // String
static const Type kAlbumArt = 18; // byte[]
static const Type kVideoFrame = 19; // Bitmap
static const Type kBitRate = 20; // Integer, Aggregate rate of
// all the streams in bps.
static const Type kAudioBitRate = 21; // Integer, bps
static const Type kVideoBitRate = 22; // Integer, bps
static const Type kAudioSampleRate = 23; // Integer, Hz
static const Type kVideoframeRate = 24; // Integer, Hz
// See RFC2046 and RFC4281.
static const Type kMimeType = 25; // String
static const Type kAudioCodec = 26; // String
static const Type kVideoCodec = 27; // String
static const Type kVideoHeight = 28; // Integer
static const Type kVideoWidth = 29; // Integer
static const Type kNumTracks = 30; // Integer
static const Type kDrmCrippled = 31; // Boolean
// @param p[inout] The parcel to append the metadata records
// to. The global metadata header should have been set already.
explicit Metadata(Parcel *p);
~Metadata();
// Rewind the underlying parcel, undoing all the changes.
void resetParcel();
// Append the size and 'META' marker.
bool appendHeader();
// Once all the records have been added, call this to update the
// lenght field in the header.
void updateLength();
// append* are methods to append metadata.
// @param key Is the metadata Id.
// @param val Is the value of the metadata.
// @return true if successful, false otherwise.
// TODO: add more as needed to handle other types.
bool appendBool(Type key, bool val);
bool appendInt32(Type key, int32_t val);
private:
Metadata(const Metadata&);
Metadata& operator=(const Metadata&);
// Checks the key is valid and not already present.
bool checkKey(Type key);
Parcel *mData;
size_t mBegin;
};
} // namespace android::media
} // namespace android
#endif // ANDROID_MEDIA_METADATA_H__
|
