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CVPixelBufferMBS class

Super class: CVImageBufferMBS

Var p as new Picture(300, 200)
Var b as CVPixelBufferMBS = CVPixelBufferMBS.PixelBufferWithPicture(p)
MsgBox str(b.Width)+" x "+str(b.Height)

• 8 properties
  • property BaseAddress as Ptr
  • property BytesPerRow as Integer
  • property DataSize as Integer
  • property Height as Integer
  • property IsPlanar as Boolean
  • property PixelFormatType as String
  • property PlaneCount as Integer
  • property Width as Integer
• 17 methods
  • method BaseAddressOfPlane(planeIndex as Integer) as Ptr
  • method BytesPerRowOfPlane(planeIndex as Integer) as Integer
  • method CIImage as Variant
  • method Constructor(pic as picture)
  • method Constructor(Width as Integer, Height as Integer, PixelFormat as Integer, data as MemoryBlock, bytesPerRow as Integer, pixelBufferAttributes as Dictionary)
  • method Constructor(Width as Integer, Height as Integer, PixelFormat as Integer, pixelBufferAttributes as Dictionary)
  • method Constructor(Width as Integer, Height as Integer, PixelFormat as String, data as MemoryBlock, bytesPerRow as Integer, pixelBufferAttributes as Dictionary)
  • method Constructor(Width as Integer, Height as Integer, PixelFormat as String, pixelBufferAttributes as Dictionary)
  • method FillExtendedPixels
  • method Flush
  • method GetExtendedPixels(byref extraColumnsOnLeft as Integer, byref extraColumnsOnRight as Integer, byref extraRowsOnTop as Integer, byref extraRowsOnBottom as Integer)
  • method HeightOfPlane(planeIndex as Integer) as Integer
  • method LockBaseAddress(flags as Integer = 0)
  • method PixelData as MemoryBlock
  • method SetPixelData(data as MemoryBlock) as Boolean
  • method UnlockBaseAddress(flags as Integer = 0)
  • method WidthOfPlane(planeIndex as Integer) as Integer
• 20 shared methods
  • shared method kCVPixelBufferBytesPerRowAlignmentKey as string
  • shared method kCVPixelBufferCGBitmapContextCompatibilityKey as string
  • shared method kCVPixelBufferCGImageCompatibilityKey as string
  • shared method kCVPixelBufferExtendedPixelsBottomKey as string
  • shared method kCVPixelBufferExtendedPixelsLeftKey as string
  • shared method kCVPixelBufferExtendedPixelsRightKey as string
  • shared method kCVPixelBufferExtendedPixelsTopKey as string
  • shared method kCVPixelBufferHeightKey as string
  • shared method kCVPixelBufferIOSurfaceCoreAnimationCompatibilityKey as string
  • shared method kCVPixelBufferIOSurfaceOpenGLFBOCompatibilityKey as string
  • shared method kCVPixelBufferIOSurfaceOpenGLTextureCompatibilityKey as string
  • shared method kCVPixelBufferIOSurfacePropertiesKey as string
  • shared method kCVPixelBufferMemoryAllocatorKey as string
  • shared method kCVPixelBufferOpenGLCompatibilityKey as string
  • shared method kCVPixelBufferPixelFormatTypeKey as string
  • shared method kCVPixelBufferPlaneAlignmentKey as string
  • shared method kCVPixelBufferWidthKey as string
  • shared method PixelBufferWithCGImage(CGImage as Variant) as CVPixelBufferMBS
  • shared method PixelBufferWithHandle(Handle as Integer) as CVPixelBufferMBS
  • shared method PixelBufferWithPicture(pic as picture) as CVPixelBufferMBS
• 65 constants

Super class CVImageBufferMBS

• 7 properties
  • property CIImage as Variant
  • property Context as CGContextMBS
  • property Handle as Integer
  • property IsFlipped as Boolean
  • property Lasterror as Integer
  • property NSImage as Variant
  • property Picture as Picture
• 2 methods
  • method Constructor   Private
  • method JPEG(CompressionFactor as Double = 0.8) as Memoryblock

This class has no sub classes.

Some methods using this class:

• AVAssetWriterInputPixelBufferAdaptorMBS.appendPixelBuffer(pixelBuffer as CVPixelBufferMBS, presentationTime as CMTimeMBS) as boolean
• AVAsynchronousVideoCompositionRequestMBS.finishWithComposedVideoFrame(composedVideoFrame as CVPixelBufferMBS)
• AVAsynchronousVideoCompositionRequestMBS.sourceFrameByTrackID(trackID as Integer) as CVPixelBufferMBS
• AVPlayerItemVideoOutputMBS.copyPixelBufferForItemTime(time as CMTimeMBS) as CVPixelBufferMBS
• AVPlayerItemVideoOutputMBS.copyPixelBufferForItemTime(time as CMTimeMBS, byref outItemTimeForDisplay as CMTimeMBS) as CVPixelBufferMBS
• AVVideoCompositionRenderContextMBS.newPixelBuffer as CVPixelBufferMBS

Some examples using this class:

• /AVFoundation/CVPixelBuffer test
• /AVFoundation/Extract video frames
• /AVFoundation/Live Barcode Detection
• /AVFoundation/Live Barcode Detection iOS/Live Barcode Detection iOS
• /AVFoundation/Live Barcode Detection with Vision/Live Barcode Detection with Vision
• /AVFoundation/Live picture processing
• /AVFoundation/Make Video From Images
• /AVFoundation/Make Video From Images with transparency

Blog Entries

• MBS Xojo Plugins, version 22.3pr4
• MBS Xojo Plugins, version 21.5pr3
• MBS Xojo Plugins, version 21.2pr1
• MonkeyBread Software Releases the MBS Xojo Plugins in version 19.4
• MBS Xojo Plugins, version 19.4pr4
• MBS Xojo Plugins, version 19.4pr2
• MBS Xojo / Real Studio Plugins, version 14.5pr4

Xojo Developer Magazine

• 12.2, page 47: Moving to AVFoundation, Leaving QuickTime behind by Christian Schmitz

Release notes

• Version 22.3
  • Implemented Constructor taking picture for CVPixelBufferMBS to work on iOS.
• Version 21.5
  • Fixed problem in VNTargetedImageRequestMBS with passing CVImageBufferMBS as CVPixelBufferMBS.
• Version 21.2
  • Changed functions returning CVImageBufferMBS to return CVPixelBufferMBS if the image buffer contains pixels.
• Version 19.4
  • Added CIImage function to CVPixelBufferMBS class.
  • Added more methods to CVPixelBufferMBS to create them with data, copy data and use more pixel types.

The items on this page are in the following plugins: MBS AVFoundation Plugin.

CVImageBufferMBS   -   CWChannelMBS