TVideoFrameBuffer Class Reference
TVideoFrameBuffer represents a buffer for a single decoded video picture. The buffer must be contained within a chunk that can be shared across processes.
The frame buffer class is used both for video renderer data flow and with the MMMFVideoClientBufferSupport extension.
Constructor & Destructor Documentation
TVideoFrameBuffer(const TUncompressedVideoFormat &, TInt, TInt, const RChunk &, TInt)
Parameters
| const TUncompressedVideoFormat & aFormat | Data format for the buffer. |
| TInt aStride | Stride for the buffer, i.e. the number of bytes from the start of one pixel row to the next. |
| TInt aBufferId | Buffer identifier, set by the buffer allocator. Buffer IDs are used to identify buffers in e.g. buffer rendering notifications. |
| const RChunk & aChunk | The chunk where the buffer is located. Note that the TVideoFrame Buffer does not take ownership of the RChunk. |
| TInt aOffsetInChunk | Offset from the beginning of the chunk for this buffer, in bytes. |
Member Functions Documentation
Buffer()
| IMPORT_C TUint8 * | Buffer | ( | ) | const |
Returns a pointer to buffer data as mapped to the current process s address space.
BufferId()
| IMPORT_C TInt | BufferId | ( | ) | const |
Returns the buffer identifier of the buffer. Buffer IDs are used to identify buffers.
BufferStatus()
Returns the buffer status.
Chunk()
| IMPORT_C const RChunk & | Chunk | ( | ) | const |
Returns the RChunk where the buffer is located. The RChunk can be shared between several TVideoFrameBuffers.
DblQueLink()
Returns the queue link for use by video renderer.
Format()
Returns the data format of the buffer. For YUV formats, typically only TUncompressedVideoFormat.iYuvFormat.iDataLayout and iPattern are valid.
PresentationTime()
|
TTime
| PresentationTime | ( | ) | const |
Returns presentation time.
SetBufferStatus(TBufferStatus)
SetPresentationTime(const TTime &)
| void | SetPresentationTime | ( | const TTime & | aTime | ) | |
Parameters
| const TTime & aTime | Presentation time |
Stride()
| IMPORT_C TUint | Stride | ( | ) | const |
Returns the stride of the buffer. This is the number of bytes from the start of one pixel row to the next. The stride is commonly equal to bytes_per_pixel*width, but can be larger if the buffer requires padding. With planar YUV data the stride refers to luminance (Y) stride. Chrominance (U & V) stride is iStride/2.
Member Enumerations Documentation
Enum TBufferStatus
Status used by video renderer
Enumerators
| EAvailable | |
| EUsedByClient | |
| EWaiting | |
| ESubmitted | |
Member Data Documentation
TUncompressedVideoFormat
iFormat
const TInt iOffset
| const TInt | iOffset | [static] |
TInt
iOffsetInChunk
|
TInt
| iOffsetInChunk | [private] |
TTime
iPresentationTime
|
TTime
| iPresentationTime | [private] |
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