| Portability | no |
|---|---|
| Stability | no |
| Maintainer | claude@mathr.co.uk |
| Safe Haskell | None |
Graphics.V4L2.Format
Description
- data BufferType
- data Direction
- class Format f where
- data FormatID
- data FormatDescription = FormatDescription {}
- data FormatFlag
- queryFormats :: Device -> BufferType -> IO (Map FormatID FormatDescription)
- data FrameSize = FrameSize {
- frameWidth :: Int
- frameHeight :: Int
- data FrameSizes
- = DiscreteSizes { }
- | StepwiseSizes { }
- queryFrameSizes :: Device -> PixelFormat -> IO FrameSizes
- data FrameIntervals
- = DiscreteIntervals { }
- | StepwiseIntervals { }
- queryFrameIntervals :: Device -> PixelFormat -> FrameSize -> IO FrameIntervals
- data ImageFormat = ImageFormat {}
Documentation
data BufferType Source
Buffer types.
Constructors
| BufferVideoCapture | |
| BufferVideoOutput | |
| BufferUnknown Word32 |
Transfer types.
Buffer formats.
Methods
formatBufferType :: f -> Direction -> BufferTypeSource
Corresponding buffer type.
getFormat :: Device -> Direction -> IO fSource
Query the format.
setFormat :: Device -> Direction -> f -> IO fSource
Select the format.
tryFormat :: Device -> Direction -> f -> IO fSource
Test the format.
Instances
Video format ID.
data FormatFlag Source
Format flags.
Constructors
| FormatCompressed | |
| FormatEmulated | |
| FormatUnknown Word32 |
queryFormats :: Device -> BufferType -> IO (Map FormatID FormatDescription)Source
Enumerate supported buffer formats.
Exceptions:
- InvalidArgument - buffer type not supported or index out of range
Single frame size.
Constructors
| FrameSize | |
Fields
| |
data FrameSizes Source
Discrete and continuous frame sizes.
Constructors
| DiscreteSizes | |
Fields | |
| StepwiseSizes | |
Fields | |
queryFrameSizes :: Device -> PixelFormat -> IO FrameSizesSource
Enumerate supported frame sizes.
data FrameIntervals Source
Discrete and continuous frame intervals.
Constructors
| DiscreteIntervals | |
Fields | |
| StepwiseIntervals | |
Fields | |
queryFrameIntervals :: Device -> PixelFormat -> FrameSize -> IO FrameIntervalsSource
Enumerate frame intervals.
data ImageFormat Source
Image format.
Constructors
| ImageFormat | |
Fields
| |