Swift - Core Foudation

#potatotips12

Transcript

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14. /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object
    containing zero or more compressed (or uncompressed)
    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typedef struct opaqueCMSampleBuffer *CMSampleBufferRef;
    $.4BNQMF#V⒎FSI
    /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object containing
    zero or more compressed (or uncompressed)
    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typealias CMSampleBufferRef = CMSampleBuffer
    

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15. /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object
    containing zero or more compressed (or uncompressed)
    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typedef struct opaqueCMSampleBuffer *CMSampleBufferRef;
    $.4BNQMF#V⒎FSI
    /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object containing
    zero or more compressed (or uncompressed)
    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typealias CMSampleBufferRef = CMSampleBuffer
    

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18. /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object
    containing zero or more compressed (or uncompressed)
    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typedef struct opaqueCMSampleBuffer *CMSampleBufferRef;
    $.4BNQMF#V⒎FSI
    /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object containing
    zero or more compressed (or uncompressed)
    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typealias CMSampleBufferRef = CMSampleBuffer
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19. /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object
    containing zero or more compressed (or uncompressed)
    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typedef struct opaqueCMSampleBuffer *CMSampleBufferRef;
    $.4BNQMF#V⒎FSI
    /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object containing
    zero or more compressed (or uncompressed)
    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typealias CMSampleBufferRef = CMSampleBuffer
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22. /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object
    containing zero or more compressed (or uncompressed)
    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typedef struct opaqueCMSampleBuffer *CMSampleBufferRef;
    $.4BNQMF#V⒎FSI
    /*!
    @typedef CMSampleBufferRef
    @abstract A reference to a CMSampleBuffer, a CF object containing
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    samples of a particular media type (audio, video, muxed,
    etc).
    */
    typealias CMSampleBufferRef = CMSampleBuffer
    

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24. func CMSampleBufferGetImageBuffer(sbuf: CMSampleBuffer!) ->
    Unmanaged!
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25. func CMSampleBufferGetImageBuffer(sbuf: CMSampleBuffer!) ->
    Unmanaged!
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    var anUnmanaged : Unmanaged =
    CMSampleBufferGetImageBuffer(sampleBuffer)
    var returnValue = anUnmanaged.takeUnretainedValue()
    var anOpaque = anUnmanaged.toOpaque()
    var pixelBuffer:CVPixelBuffer =
    Unmanaged.fromOpaque(anOpaque).takeUnretainedValue()
    

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    var anUnmanaged : Unmanaged =
    CMSampleBufferGetImageBuffer(sampleBuffer)
    var returnValue = anUnmanaged.takeUnretainedValue()
    var anOpaque = anUnmanaged.toOpaque()
    var pixelBuffer:CVPixelBuffer =
    CMSampleBufferGetImageBuffer(sampleBuffer)
    

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    var unmanagedPixelBuffer:Unmanaged? = nil
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    var pixelBuffer:CVPixelBuffer =
    Unmanaged.takeUnretainedValue(unmanagedPix
    elBuffer!)()
    

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36. /// Get the value of this unmanaged reference as a managed
    /// reference and consume an unbalanced retain of it.
    ///
    /// This is useful when a function returns an unmanaged reference
    /// and you know that you're responsible for releasing the result.
    func takeRetainedValue() -> T
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    /// Get the value of this unmanaged reference as a managed
    /// reference without consuming an unbalanced retain of it.
    ///
    /// This is useful when a function returns an unmanaged reference
    /// and you know that you're not responsible for releasing the result.
    func takeUnretainedValue() -> T
    

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