[−][src]Struct v4l::buffers::mmap_manager::MappedBufferManager
Manage mapped buffers
All buffers are unmapped in the Drop impl. In case of errors during unmapping, we panic because there is memory corruption going on.
Implementations
impl<'a> MappedBufferManager<'a>
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pub fn new(dev: &'a dyn Device) -> Self
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Returns a new buffer manager instance
You usually do not need to use this directly. A MappedBufferStream creates its own manager instance by default.
Arguments
dev
- Capture device ref to get its file descriptor
Example
use v4l::CaptureDevice; use v4l::buffers::MappedBufferManager; let dev = CaptureDevice::new(0); if let Ok(dev) = dev { let mgr = MappedBufferManager::new(&dev); }
Trait Implementations
impl<'a> BufferManager for MappedBufferManager<'a>
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type Buffer = MappedBuffer<'a>
Type of the buffers (DMA, mmap, userptr)
fn allocate(&mut self, count: u32) -> Result<u32>
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fn release(&mut self) -> Result<()>
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fn queue(&mut self) -> Result<()>
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fn dequeue(&mut self) -> Result<Self::Buffer>
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impl<'a> Drop for MappedBufferManager<'a>
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Auto Trait Implementations
impl<'a> !RefUnwindSafe for MappedBufferManager<'a>
impl<'a> !Send for MappedBufferManager<'a>
impl<'a> !Sync for MappedBufferManager<'a>
impl<'a> Unpin for MappedBufferManager<'a>
impl<'a> !UnwindSafe for MappedBufferManager<'a>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,