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AVFrameのtupleのデータをArrayで変換 ref: http://qiita.com/funcodes/items/7b91c6b740f42ea66a04
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| typedef struct AVFrame { | |
| ... | |
| uint8_t *data[AV_NUM_DATA_POINTERS]; // AV_NUM_DATA_POINTERS = 8 | |
| ... |
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| public struct AVFrame { | |
| public var data: (UnsafeMutablePointer<UInt8>?, UnsafeMutablePointer<UInt8>?, UnsafeMutablePointer<UInt8>?, UnsafeMutablePointer<UInt8>?, UnsafeMutablePointer<UInt8>?, UnsafeMutablePointer<UInt8>?, UnsafeMutablePointer<UInt8>?, UnsafeMutablePointer<UInt8>?) | |
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| let tuplePointer: UnsafePointer<(UnsafePointer<UInt8>?, UnsafePointer<UInt8>?, ...)> = withUnsafePointer(to: $tuplePointer){$0} | |
| let unsignedInteger8Buffer: UnsafePointer<UnsafePointer<UInt8>?> = UnsafePointer(tuplePointer.withMemoryRebound(to: (UnsafePointer<UInt8>?.self)!, capacity: 8){$0} | |
| let bufferPointer: UnsafeBufferPointer<UnsafePointer<UInt8>?> = UnsafeBufferPointer(start: unsignedInteger8Buffer, count: 8) | |
| let arr = Array(bufferPointer) |
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