L'électron rare
077a7f707f
Add FrameHeader, a fixed-size binary record so the demuxer can frame and resync the iPhone USB stream. Layout is big-endian: 4-byte magic AVL1, tag u8, pid i16, timestamp f64, length u32. The magic prefix lets a reader detect and skip corrupt bytes. Decoding rejects short buffers and bad magic by returning nil. Big-endian append/parse helpers are added as Data/UInt extensions to keep the codec self-contained.
25 lines
752 B
Swift
25 lines
752 B
Swift
import XCTest
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@testable import AVLiveWire
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final class FrameHeaderTests: XCTestCase {
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func testRoundTrip() {
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let h = FrameHeader(tag: .skeleton, pid: 7,
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timestamp: 12.5, length: 1092)
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let bytes = h.encoded()
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XCTAssertEqual(bytes.count, FrameHeader.byteCount)
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let decoded = FrameHeader(decoding: bytes)
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XCTAssertEqual(decoded, h)
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}
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func testRejectsBadMagic() {
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var bytes = FrameHeader(tag: .video, pid: -1,
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timestamp: 0, length: 0).encoded()
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bytes[0] = 0x00
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XCTAssertNil(FrameHeader(decoding: bytes))
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}
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func testRejectsShortBuffer() {
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XCTAssertNil(FrameHeader(decoding: Data([0x41, 0x56])))
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}
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}
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