import CoreMedia

extension CMSampleBuffer {
    var dependsOnOthers: Bool {
        guard
            let attachments: CFArray = CMSampleBufferGetSampleAttachmentsArray(self, false) else {
                return false
        }
        let attachment: [NSObject: AnyObject] = unsafeBitCast(CFArrayGetValueAtIndex(attachments, 0), to: CFDictionary.self) as [NSObject: AnyObject]
        return attachment["DependsOnOthers" as NSObject] as! Bool
    }
    var dataBuffer: CMBlockBuffer? {
        get {
            return CMSampleBufferGetDataBuffer(self)
        }
        set {
            guard let dataBuffer: CMBlockBuffer = newValue else {
                return
            }
            CMSampleBufferSetDataBuffer(self, dataBuffer)
        }
    }
    var imageBuffer: CVImageBuffer? {
        return CMSampleBufferGetImageBuffer(self)
    }
    var numSamples: CMItemCount {
        return CMSampleBufferGetNumSamples(self)
    }
    var duration: CMTime {
        return CMSampleBufferGetDuration(self)
    }
    var formatDescription: CMFormatDescription? {
        return CMSampleBufferGetFormatDescription(self)
    }
    var decodeTimeStamp: CMTime {
        return CMSampleBufferGetDecodeTimeStamp(self)
    }
    var presentationTimeStamp: CMTime {
        return CMSampleBufferGetPresentationTimeStamp(self)
    }
}