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Diffstat (limited to 'include/media/Metadata.h')
| -rw-r--r-- | include/media/Metadata.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/include/media/Metadata.h b/include/media/Metadata.h new file mode 100644 index 0000000..241868a --- /dev/null +++ b/include/media/Metadata.h @@ -0,0 +1,133 @@ +/* + * 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; + + // Keep in sync with android/media/Metadata.java + static const Type kTitle = 1; // String + static const Type kComment = 2; // String + static const Type kCopyright = 3; // String + static const Type kAlbum = 4; // String + static const Type kArtist = 5; // String + static const Type kAuthor = 6; // String + static const Type kComposer = 7; // String + static const Type kGenre = 8; // String + static const Type kDate = 9; // Date + static const Type kDuration = 10; // Integer(millisec) + static const Type kCdTrackNum = 11; // Integer 1-based + static const Type kCdTrackMax = 12; // Integer + static const Type kRating = 13; // String + static const Type kAlbumArt = 14; // byte[] + static const Type kVideoFrame = 15; // Bitmap + static const Type kCaption = 16; // TimedText + + static const Type kBitRate = 17; // Integer, Aggregate rate of + // all the streams in bps. + + static const Type kAudioBitRate = 18; // Integer, bps + static const Type kVideoBitRate = 19; // Integer, bps + static const Type kAudioSampleRate = 20; // Integer, Hz + static const Type kVideoframeRate = 21; // Integer, Hz + + // See RFC2046 and RFC4281. + static const Type kMimeType = 22; // String + static const Type kAudioCodec = 23; // String + static const Type kVideoCodec = 24; // String + + static const Type kVideoHeight = 25; // Integer + static const Type kVideoWidth = 26; // Integer + static const Type kNumTracks = 27; // Integer + static const Type kDrmCrippled = 28; // Boolean + + // Playback capabilities. + static const Type kPauseAvailable = 29; // Boolean + static const Type kSeekBackwardAvailable = 30; // Boolean + static const Type kSeekForwardAvailable = 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__ |