Symbian
Symbian OS Library

SYMBIAN OS V9.3

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Location: devvideoplay.h
Link against: devvideo.lib

This item is not part of the S60 3rd Edition SDK for Symbian OS, Feature Pack 2.

Class TVideoInputBuffer

class TVideoInputBuffer;

Description

A buffer for compressed video data, contains one coded data unit. Video buffers are used for writing video data to the API.

Members

Defined in TVideoInputBuffer:
EDecodingTimestamp, EPresentationTimestamp, ESequenceNumber, TVideoBufferOptions, TVideoInputBuffer(), iData, iDecodingTimestamp, iError, iLink, iOptions, iPreRoll, iPresentationTimestamp, iSequenceNumber, iUser


Construction and destruction


TVideoInputBuffer()

IMPORT_C TVideoInputBuffer();

Description

Default constructor. Zeroes all members (including iData which will point to garbage until manually set to point to the real video buffer memory data area by the user).

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Member enumerations


Enum TVideoBufferOptions

TVideoBufferOptions

Description

ESequenceNumber

The sequence number field is valid.

EDecodingTimestamp

The decoding timestamp field is valid

EPresentationTimestamp

The presentation timestamp field is valid.

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Member data


iData

TPtr8 iData;

Description

Pointer to the video data.


iOptions

TUint32 iOptions;

Description

Data unit options. The value is a bitfield combined from values from TVideoBufferOptions.

See also:


iDecodingTimestamp

TTimeIntervalMicroSeconds iDecodingTimestamp;

Description

Data unit decoding timestamp. Valid if EDecodingTimestamp is set in the options.


iPresentationTimestamp

TTimeIntervalMicroSeconds iPresentationTimestamp;

Description

Data unit presentation timestamp. Valid if EPresentationTimestamp is set in the options. If the input bitstream does not contain timestamp information, this field should be valid, otherwise pictures cannot be displayed at the correct time. If the input bitstream contains timestamp information (such as the TR syntax element of H.263 bitstreams) and valid iPresentationTimestamp is provided, the value of iPresentationTimestamp is used in playback.


iPreRoll

TBool iPreRoll;

Description

True if the data is part of a pre-roll period and may not be drawn. The decoder may skip display-related operations, but must still decode normally since pre-roll may not end in a key frame.


iSequenceNumber

TUint iSequenceNumber;

Description

Data unit sequence number. Valid if ESequenceNumber is set in the options. If present, the sequence number is incremented once per coded data unit, a gap in the numbers indicates missing data.


iError

TBool iError;

Description

True if the data unit is known to contain erroneous data.


iLink

TDblQueLink iLink;

Description

A queue link used internally by the MSL API. The field must not be modified while the buffer is in the MSL API, but can be used by the client before the buffer has been written and after the buffer has been returned.


iUser

TAny * iUser;

Description

A pointer for free-form user data. The pointer is set by the module that created the buffer, and is usually used for memory management purposes.