Retire legacy sources and verify managed iOS deployment
This commit is contained in:
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import Foundation
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import Darwin
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// Darwin notification names the extension posts and the host observes, so the host can react to
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// broadcast start/stop promptly instead of only polling the ring's active flag. Shared (compiled
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// into both targets) so the names can't drift.
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enum BroadcastNotification {
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static let started = "cat.voice.VoiceCat.broadcast.started"
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static let finished = "cat.voice.VoiceCat.broadcast.finished"
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}
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// BroadcastAudioRing — cross-process single-producer/single-consumer int16 PCM ring over an
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// mmap'd file in the shared App Group container. Compiled into BOTH the host app and the
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// ReplayKit broadcast upload extension (docs/voice.md §9, iOS detail).
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//
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// producer = the broadcast extension's RPBroadcastSampleHandler (captured system audio)
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// consumer = the host app's BroadcastAudioPump (drains and feeds the core via feedPcm)
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//
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// Why a hand-rolled ring instead of Swift's `Atomic`: the storage lives in shared memory mapped
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// into two processes, so the synchronization words must sit in that mapping — Swift's managed
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// atomics can't. For strict SPSC, aligned 64-bit monotonic indices with full memory barriers
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// (`OSMemoryBarrier`) give correct acquire/release ordering. The extension does NOT link
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// libvoicecat — it only writes PCM here; all encode/crypto/UDP happens in the host.
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//
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// Lifecycle: the host opens the ring at connect (and thus initializes the header first); the
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// extension opens it later when a broadcast starts. On a rising edge of `isActive` the host
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// calls `drainStale()` to discard any pre-roll, then drains in whole 20 ms frames.
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final class BroadcastAudioRing {
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static let appGroupId = "group.me.iamtalon.voicecat"
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enum RingError: Error { case noContainer, openFailed, mapFailed }
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// Header layout (byte offsets into the mmap). Indices are 8-byte aligned; mmap is
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// page-aligned so offsets 24/32 satisfy that.
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private static let magic: UInt32 = 0x5643_4252 // "VCBR"
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private static let version: UInt32 = 1
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private static let headerBytes = 64
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/// 1 second of 48 kHz stereo int16 — ample slack for ~10 ms host drains.
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static let capacitySamples = 48_000 * 2
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private static let offMagic = 0
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private static let offVersion = 4
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private static let offChannels = 8
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private static let offSampleRate = 12
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private static let offActive = 16
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private static let offWrite = 24
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private static let offRead = 32
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private let fd: Int32
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private let mapBase: UnsafeMutableRawPointer
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private let mapSize: Int
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private let data: UnsafeMutablePointer<Int16>
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private let capacity: Int
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init() throws {
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guard let container = FileManager.default.containerURL(
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forSecurityApplicationGroupIdentifier: Self.appGroupId) else {
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throw RingError.noContainer
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}
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let dir = container.appendingPathComponent("voicecat", isDirectory: true)
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try? FileManager.default.createDirectory(at: dir, withIntermediateDirectories: true)
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let path = dir.appendingPathComponent("broadcast_audio.ring").path
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capacity = Self.capacitySamples
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mapSize = Self.headerBytes + capacity * MemoryLayout<Int16>.size
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let f = open(path, O_RDWR | O_CREAT, 0o644)
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guard f >= 0 else { throw RingError.openFailed }
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if ftruncate(f, off_t(mapSize)) != 0 { close(f); throw RingError.openFailed }
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let p = mmap(nil, mapSize, PROT_READ | PROT_WRITE, MAP_SHARED, f, 0)
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guard let p, p != MAP_FAILED else { close(f); throw RingError.mapFailed }
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fd = f
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mapBase = p
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data = (p + Self.headerBytes).assumingMemoryBound(to: Int16.self)
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// First opener initializes the header (host opens first, before any broadcast).
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if load32(Self.offMagic) != Self.magic {
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store32(Self.offWrite, 0); store32(Self.offWrite + 4, 0)
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store32(Self.offRead, 0); store32(Self.offRead + 4, 0)
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store32(Self.offChannels, 0)
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store32(Self.offSampleRate, 0)
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store32(Self.offActive, 0)
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store32(Self.offVersion, Self.version)
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OSMemoryBarrier()
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store32(Self.offMagic, Self.magic)
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}
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}
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deinit {
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munmap(mapBase, mapSize)
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close(fd)
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}
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// MARK: - Header accessors
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var isActive: Bool { OSMemoryBarrier(); return load32(Self.offActive) != 0 }
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var channels: UInt32 { load32(Self.offChannels) }
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var sampleRate: UInt32 { load32(Self.offSampleRate) }
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/// Producer: advertise the canonical capture format and toggle the active flag. Called from
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/// `broadcastStarted`/`broadcastFinished`.
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func setActive(_ active: Bool, channels: UInt32 = 0, sampleRate: UInt32 = 0) {
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if active {
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store32(Self.offChannels, channels)
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store32(Self.offSampleRate, sampleRate)
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}
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OSMemoryBarrier()
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store32(Self.offActive, active ? 1 : 0)
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}
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// MARK: - Producer (extension)
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/// Append interleaved int16 samples. Drops the whole chunk if it doesn't fit — skipping a
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/// chunk is better than tearing a frame. Single producer only.
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func push(_ samples: UnsafeBufferPointer<Int16>) {
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let n = samples.count
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guard n > 0, n <= capacity, let src = samples.baseAddress else { return }
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let w = load64(Self.offWrite) // producer owns the write index
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let r = loadAcquire64(Self.offRead)
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if capacity - Int(w &- r) < n { return } // full: drop
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var idx = Int(w % UInt64(capacity))
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var off = 0
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var rem = n
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while rem > 0 {
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let chunk = min(rem, capacity - idx)
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(data + idx).update(from: src + off, count: chunk)
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idx = (idx + chunk) % capacity
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off += chunk
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rem -= chunk
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}
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storeRelease64(Self.offWrite, w &+ UInt64(n))
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}
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// MARK: - Consumer (host)
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/// Read up to `out.count` interleaved int16 samples. Returns the number read. Single
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/// consumer only.
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func read(into out: UnsafeMutableBufferPointer<Int16>) -> Int {
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guard let dst = out.baseAddress else { return 0 }
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let r = load64(Self.offRead) // consumer owns the read index
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let w = loadAcquire64(Self.offWrite)
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let available = Int(w &- r)
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if available <= 0 { return 0 }
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let n = min(available, out.count)
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var idx = Int(r % UInt64(capacity))
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var off = 0
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var rem = n
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while rem > 0 {
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let chunk = min(rem, capacity - idx)
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(dst + off).update(from: data + idx, count: chunk)
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idx = (idx + chunk) % capacity
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off += chunk
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rem -= chunk
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}
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storeRelease64(Self.offRead, r &+ UInt64(n))
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return n
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}
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/// Consumer: discard everything currently buffered (catch the read index up to write).
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func drainStale() { storeRelease64(Self.offRead, loadAcquire64(Self.offWrite)) }
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// MARK: - Memory-ordered accessors
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private func ptr32(_ off: Int) -> UnsafeMutablePointer<UInt32> {
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(mapBase + off).assumingMemoryBound(to: UInt32.self)
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}
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private func ptr64(_ off: Int) -> UnsafeMutablePointer<UInt64> {
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(mapBase + off).assumingMemoryBound(to: UInt64.self)
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}
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private func load32(_ off: Int) -> UInt32 { ptr32(off).pointee }
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private func store32(_ off: Int, _ v: UInt32) { ptr32(off).pointee = v }
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private func load64(_ off: Int) -> UInt64 { ptr64(off).pointee }
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private func loadAcquire64(_ off: Int) -> UInt64 { let v = ptr64(off).pointee; OSMemoryBarrier(); return v }
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private func storeRelease64(_ off: Int, _ v: UInt64) { OSMemoryBarrier(); ptr64(off).pointee = v }
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}
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@@ -0,0 +1,33 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>CFBundleDevelopmentRegion</key>
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<string>$(DEVELOPMENT_LANGUAGE)</string>
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<key>CFBundleDisplayName</key>
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<string>VoiceCat Screen Audio</string>
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<key>CFBundleExecutable</key>
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<string>$(EXECUTABLE_NAME)</string>
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<key>CFBundleIdentifier</key>
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<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
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<key>CFBundleInfoDictionaryVersion</key>
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<string>6.0</string>
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<key>CFBundleName</key>
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<string>$(PRODUCT_NAME)</string>
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<key>CFBundlePackageType</key>
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<string>XPC!</string>
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<key>CFBundleShortVersionString</key>
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<string>0.0.1</string>
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<key>CFBundleVersion</key>
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<string>1</string>
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<key>NSExtension</key>
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<dict>
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<key>NSExtensionPointIdentifier</key>
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<string>com.apple.broadcast-services-upload</string>
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<key>NSExtensionPrincipalClass</key>
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<string>$(PRODUCT_MODULE_NAME).SampleHandler</string>
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<key>RPBroadcastProcessMode</key>
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<string>RPBroadcastProcessModeSampleBuffer</string>
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</dict>
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</dict>
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</plist>
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@@ -0,0 +1,88 @@
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import ReplayKit
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import AVFoundation
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// SampleHandler — the ReplayKit broadcast upload extension entry point (docs/voice.md §9, iOS).
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//
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// This runs in a SEPARATE process with a ~50 MB memory cap. It captures system/app audio
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// (`.audioApp`), drops video and mic buffers, converts each chunk to the core's canonical
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// format (48 kHz, int16, stereo interleaved) with AVAudioConverter, and writes it into the
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// App Group shared-memory ring. The host app's BroadcastAudioPump drains the ring and feeds the
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// already-connected VoiceCatClient — so all Opus/AEAD/UDP work happens in the host, and the
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// extension stays tiny and well inside the memory budget (no libvoicecat here).
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class SampleHandler: RPBroadcastSampleHandler {
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private var ring: BroadcastAudioRing?
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private var converter: AVAudioConverter?
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private var inputFormat: AVAudioFormat?
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private let outputFormat = AVAudioFormat(commonFormat: .pcmFormatInt16,
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sampleRate: 48_000, channels: 2, interleaved: true)!
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override func broadcastStarted(withSetupInfo setupInfo: [String: NSObject]?) {
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ring = try? BroadcastAudioRing()
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ring?.setActive(true, channels: 2, sampleRate: 48_000)
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postDarwin(BroadcastNotification.started)
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}
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override func broadcastFinished() {
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ring?.setActive(false)
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postDarwin(BroadcastNotification.finished)
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ring = nil
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}
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override func processSampleBuffer(_ sampleBuffer: CMSampleBuffer,
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with sampleBufferType: RPSampleBufferType) {
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// App/system audio only — drop video (the memory hog) and the device mic (the host
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// already captures and sends the user's voice).
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guard sampleBufferType == .audioApp, let ring else { return }
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guard let input = makeInputBuffer(sampleBuffer),
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let conv = converter(for: input.format) else { return }
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let ratio = outputFormat.sampleRate / input.format.sampleRate
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let capacity = AVAudioFrameCount(Double(input.frameLength) * ratio) + 1024
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guard let output = AVAudioPCMBuffer(pcmFormat: outputFormat, frameCapacity: capacity) else { return }
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var supplied = false
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var error: NSError?
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let status = conv.convert(to: output, error: &error) { _, outStatus in
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if supplied { outStatus.pointee = .noDataNow; return nil }
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supplied = true
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outStatus.pointee = .haveData
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return input
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}
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guard status != .error, output.frameLength > 0,
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let mData = output.audioBufferList.pointee.mBuffers.mData else { return }
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// Interleaved int16 → one buffer of frameLength * channels samples.
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let count = Int(output.frameLength) * Int(outputFormat.channelCount)
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ring.push(UnsafeBufferPointer(start: mData.assumingMemoryBound(to: Int16.self), count: count))
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}
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// MARK: - Helpers
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/// Wrap the ReplayKit CMSampleBuffer's PCM in an AVAudioPCMBuffer matching its native format.
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private func makeInputBuffer(_ sb: CMSampleBuffer) -> AVAudioPCMBuffer? {
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guard let fmtDesc = CMSampleBufferGetFormatDescription(sb),
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var asbd = CMAudioFormatDescriptionGetStreamBasicDescription(fmtDesc)?.pointee,
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let fmt = AVAudioFormat(streamDescription: &asbd) else { return nil }
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let frames = AVAudioFrameCount(CMSampleBufferGetNumSamples(sb))
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guard frames > 0, let buf = AVAudioPCMBuffer(pcmFormat: fmt, frameCapacity: frames) else { return nil }
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buf.frameLength = frames
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let status = CMSampleBufferCopyPCMDataIntoAudioBufferList(
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sb, at: 0, frameCount: Int32(frames), into: buf.mutableAudioBufferList)
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return status == noErr ? buf : nil
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}
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/// Reuse the converter while the input format is stable; rebuild if ReplayKit changes it.
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private func converter(for inFmt: AVAudioFormat) -> AVAudioConverter? {
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if let converter, inputFormat == inFmt { return converter }
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inputFormat = inFmt
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converter = AVAudioConverter(from: inFmt, to: outputFormat)
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return converter
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}
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private func postDarwin(_ name: String) {
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CFNotificationCenterPostNotification(
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CFNotificationCenterGetDarwinNotifyCenter(),
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CFNotificationName(name as CFString), nil, nil, true)
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}
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}
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@@ -0,0 +1,5 @@
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<?xml version="1.0" encoding="UTF-8"?>
|
||||
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
|
||||
<plist version="1.0">
|
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<dict/>
|
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</plist>
|
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@@ -0,0 +1,285 @@
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// !$*UTF8*$!
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{
|
||||
archiveVersion = 1;
|
||||
classes = {
|
||||
};
|
||||
objectVersion = 77;
|
||||
objects = {
|
||||
|
||||
/* Begin PBXBuildFile section */
|
||||
29834FA59EC5E9B6DF979969 /* SampleHandler.swift in Sources */ = {isa = PBXBuildFile; fileRef = D24D2F62C1EF73701DF67AA6 /* SampleHandler.swift */; };
|
||||
5C0FDF35C05B25379CF645CA /* BroadcastAudioRing.swift in Sources */ = {isa = PBXBuildFile; fileRef = 152BBEF11B0F4FB35CCBF3A2 /* BroadcastAudioRing.swift */; };
|
||||
/* End PBXBuildFile section */
|
||||
|
||||
/* Begin PBXFileReference section */
|
||||
152BBEF11B0F4FB35CCBF3A2 /* BroadcastAudioRing.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BroadcastAudioRing.swift; sourceTree = "<group>"; };
|
||||
A934011B829BCAEA203893A0 /* VoiceCatBroadcast.appex */ = {isa = PBXFileReference; includeInIndex = 0; lastKnownFileType = "wrapper.app-extension"; path = VoiceCatBroadcast.appex; sourceTree = BUILT_PRODUCTS_DIR; };
|
||||
D24D2F62C1EF73701DF67AA6 /* SampleHandler.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SampleHandler.swift; sourceTree = "<group>"; };
|
||||
/* End PBXFileReference section */
|
||||
|
||||
/* Begin PBXGroup section */
|
||||
4377E6881B8FB83F47ABA5E5 = {
|
||||
isa = PBXGroup;
|
||||
children = (
|
||||
152BBEF11B0F4FB35CCBF3A2 /* BroadcastAudioRing.swift */,
|
||||
D24D2F62C1EF73701DF67AA6 /* SampleHandler.swift */,
|
||||
B4E33FBE3AC90EF1881C5631 /* Products */,
|
||||
);
|
||||
sourceTree = "<group>";
|
||||
};
|
||||
B4E33FBE3AC90EF1881C5631 /* Products */ = {
|
||||
isa = PBXGroup;
|
||||
children = (
|
||||
A934011B829BCAEA203893A0 /* VoiceCatBroadcast.appex */,
|
||||
);
|
||||
name = Products;
|
||||
sourceTree = "<group>";
|
||||
};
|
||||
/* End PBXGroup section */
|
||||
|
||||
/* Begin PBXNativeTarget section */
|
||||
774C80771B891815C5E19751 /* VoiceCatBroadcast */ = {
|
||||
isa = PBXNativeTarget;
|
||||
buildConfigurationList = 8C33CB44BD31062DFD678CB0 /* Build configuration list for PBXNativeTarget "VoiceCatBroadcast" */;
|
||||
buildPhases = (
|
||||
F14685D9DD890398711192C2 /* Sources */,
|
||||
);
|
||||
buildRules = (
|
||||
);
|
||||
dependencies = (
|
||||
);
|
||||
name = VoiceCatBroadcast;
|
||||
packageProductDependencies = (
|
||||
);
|
||||
productName = VoiceCatBroadcast;
|
||||
productReference = A934011B829BCAEA203893A0 /* VoiceCatBroadcast.appex */;
|
||||
productType = "com.apple.product-type.app-extension";
|
||||
};
|
||||
/* End PBXNativeTarget section */
|
||||
|
||||
/* Begin PBXProject section */
|
||||
A0A4E1880BAF927B953E1583 /* Project object */ = {
|
||||
isa = PBXProject;
|
||||
attributes = {
|
||||
BuildIndependentTargetsInParallel = YES;
|
||||
LastUpgradeCheck = 1430;
|
||||
TargetAttributes = {
|
||||
774C80771B891815C5E19751 = {
|
||||
DevelopmentTeam = "";
|
||||
};
|
||||
};
|
||||
};
|
||||
buildConfigurationList = 605496843E71431C0A32561D /* Build configuration list for PBXProject "VoiceCatBroadcast" */;
|
||||
developmentRegion = en;
|
||||
hasScannedForEncodings = 0;
|
||||
knownRegions = (
|
||||
Base,
|
||||
en,
|
||||
);
|
||||
mainGroup = 4377E6881B8FB83F47ABA5E5;
|
||||
minimizedProjectReferenceProxies = 1;
|
||||
preferredProjectObjectVersion = 77;
|
||||
productRefGroup = B4E33FBE3AC90EF1881C5631 /* Products */;
|
||||
projectDirPath = "";
|
||||
projectRoot = "";
|
||||
targets = (
|
||||
774C80771B891815C5E19751 /* VoiceCatBroadcast */,
|
||||
);
|
||||
};
|
||||
/* End PBXProject section */
|
||||
|
||||
/* Begin PBXSourcesBuildPhase section */
|
||||
F14685D9DD890398711192C2 /* Sources */ = {
|
||||
isa = PBXSourcesBuildPhase;
|
||||
buildActionMask = 2147483647;
|
||||
files = (
|
||||
5C0FDF35C05B25379CF645CA /* BroadcastAudioRing.swift in Sources */,
|
||||
29834FA59EC5E9B6DF979969 /* SampleHandler.swift in Sources */,
|
||||
);
|
||||
runOnlyForDeploymentPostprocessing = 0;
|
||||
};
|
||||
/* End PBXSourcesBuildPhase section */
|
||||
|
||||
/* Begin XCBuildConfiguration section */
|
||||
197C65697A3665F765F1D68C /* Release */ = {
|
||||
isa = XCBuildConfiguration;
|
||||
buildSettings = {
|
||||
CODE_SIGN_ENTITLEMENTS = VoiceCatBroadcast.entitlements;
|
||||
INFOPLIST_FILE = Info.plist;
|
||||
LD_RUNPATH_SEARCH_PATHS = (
|
||||
"$(inherited)",
|
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Generated
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<?xml version="1.0" encoding="UTF-8"?>
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<Workspace
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version = "1.0">
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<FileRef
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location = "self:">
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@@ -0,0 +1,32 @@
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name: VoiceCatBroadcast
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||||
options:
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||||
deploymentTarget:
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iOS: "18.0"
|
||||
settings:
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base:
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DEVELOPMENT_TEAM: ""
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||||
targets:
|
||||
VoiceCatBroadcast:
|
||||
type: app-extension
|
||||
platform: iOS
|
||||
sources:
|
||||
- SampleHandler.swift
|
||||
- BroadcastAudioRing.swift
|
||||
info:
|
||||
path: Info.plist
|
||||
properties:
|
||||
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|
||||
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entitlements:
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PRODUCT_NAME: VoiceCatBroadcast
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SKIP_INSTALL: YES
|
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TARGETED_DEVICE_FAMILY: "1,2"
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||||
Reference in New Issue
Block a user