| class TVideoPictureHeader |
Header information for one decoded picture. The header information is returned alongside with decoded pictures, or it can be read separately when DevVideoPlay is being initialized.
| Public Member Enumerations | |
|---|---|
| enum | THeaderOptions { EDecodingTimestamp = 0x00000001, EPresentationTimestamp = 0x00000002, EPreDecoderBufferSize = 0x00000004, EPostDecoderBufferSize = 0x00000008, EPictureNumber = 0x00000010, ELayeredCoding = 0x00000020, ESupplementalData = 0x00000040, ERandomAccessBufferingPeriod = 0x00000080, ERandomAccessBufferOccupancy = 0x00000100 } |
| EDecodingTimestamp = 0x00000001 |
Decoding timestamp is valid |
| EPresentationTimestamp = 0x00000002 |
Presentation timestamp is valid |
| EPreDecoderBufferSize = 0x00000004 |
Pre-decoder buffersize is valid |
| EPostDecoderBufferSize = 0x00000008 |
Post-decoder buffersize is valid |
| EPictureNumber = 0x00000010 |
Picture number field is valid |
| ELayeredCoding = 0x00000020 |
Layered coding is used and the layer number field is valid |
| ESupplementalData = 0x00000040 |
Supplemental data is available |
| ERandomAccessBufferingPeriod = 0x00000080 |
Random access buffering period is valid |
| ERandomAccessBufferOccupancy = 0x00000100 |
Random access buffer occupancy is valid |
| TTimeIntervalMicroSeconds | iDecodingTimestamp |
Picture decoding timestamp. Valid only if EDecodingTimestamp is set in the options.
| TBool | iIsRandomAccessible |
True if the picture is a random-accessible picture.
| const TDesC8 * | iOptional |
Pointer to a descriptor that contains optional codec-specific features. Set to NULL if not used. The format of the data is codec-specific. The pointer and descriptor data are valid as long as the header information structure is valid.
| TUint32 | iOptions |
Header options. The value is a bitfield combined from values from THeaderOptions.
| TUint | iPictureLayer |
Picture layer number if layered coding is used, valid only if ELayeredCoding is set in the options. Layers are numbered [0 n-1], where n is the number of layers available. The first layer (layer zero) is the base layer, it can be decoded independently from the other layers, and it has the lowest total bitrate.
| TUint | iPictureNumber |
Picture number, valid only if EPictureNumber is set in the options. This field is used to indicate one of the following: picture number or long-term picture index for H.263, vop_id for MPEG-4 Visual, picture number or long-term picture number for AVC.
| TUint | iPostDecoderBufferSize |
Expected post-decoder buffer size in bytes. Valid only if EPostDecoderBufferSize is set in the options. It is assumed that a frame buffer to be displayed is returned before the decoding of the next frame is started. If this is not the case, a larger post-decoder buffer may actually be needed.
| TUint | iPreDecoderBufferSize |
Expected pre-decoder buffer size in bytes. Valid only if EPreDecoderBufferSize is set in the options.
| TTimeIntervalMicroSeconds | iPresentationTimestamp |
Picture presentation timestamp. Valid only if EPresentationTimestamp is set in the options. The clock frequency is stored in the timestamp structure.
| TUint | iRandomAccessBufferOccupancy |
The expected initial pre-decoder buffer occupancy in bytes before starting the playback from this picture. Valid if this picture is randomly accessible (iIsRandomAccessible is true) and ERandomAccessBufferOccupancy is set in the options. MPEG-4 Visual uses this value.
| TTimeIntervalMicroSeconds32 | iRandomAccessBufferingPeriod |
The expected initial pre-decoder buffering period before starting the playback from this picture. Valid only if this picture is randomly accessible (iIsRandomAccessible is true) and ERandomAccessBufferingPeriod is set in the options. MPEG-2 and H.264 | MPEG-4 AVC use this value.
| TSize | iSizeInMemory |
Image size in memory, in pixels. May be larger than the displayed picture.
| const TDesC8 * | iSupplementalData |
Picture supplemental data, valid only if ESupplementalData is set in the options. The pointer and descriptor data are valid as long as the header information structure is valid.
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