fix build error

This commit is contained in:
Nick Payne
2025-07-27 09:55:33 +01:00
parent abaa019bd2
commit 8c3ee0f4e7
2 changed files with 19 additions and 18 deletions
+18 -17
View File
@@ -7,12 +7,12 @@ public class AudioBuffer {
private var readIndex: Int = 0
private var availableBytes: Int = 0
private let maxBufferSize: Int
private let bytesPerChunk: Int
private let chunkDuration: Double
public init(format: AudioStreamBasicDescription, chunkDuration: Double = 0.2) {
// Pre-calculate chunk parameters
let bytesPerFrame = Int(format.mBytesPerFrame)
let samplesPerChunk = Int(format.mSampleRate * chunkDuration)
@@ -22,24 +22,26 @@ public class AudioBuffer {
// Calculate max buffer size to hold ~10 seconds of audio, way more than the maximum we allow
let bytesPerSecond = Int(format.mSampleRate) * bytesPerFrame
self.maxBufferSize = bytesPerSecond * 10
// Pre-allocated ring buffer
self.buffer = Array(repeating: 0, count: maxBufferSize)
}
public func append(_ data: Data) {
guard availableBytes + data.count <= maxBufferSize else {
Logger.error("Audio buffer overflow", context: [
"requested": String(data.count),
"available": String(maxBufferSize - availableBytes)
])
Logger.error(
"Audio buffer overflow",
context: [
"requested": String(data.count),
"available": String(maxBufferSize - availableBytes),
])
return
}
data.withUnsafeBytes { bytes in
let sourceBytes = bytes.bindMemory(to: UInt8.self)
let dataSize = sourceBytes.count
// Check if we can copy in one block (no wrap-around)
if writeIndex + dataSize <= maxBufferSize {
// only one write needed
@@ -49,14 +51,14 @@ public class AudioBuffer {
// two writes needed due to wrap-around
let firstChunkSize = maxBufferSize - writeIndex
let secondChunkSize = dataSize - firstChunkSize
buffer.replaceSubrange(writeIndex..<maxBufferSize, with: sourceBytes.prefix(firstChunkSize))
buffer.replaceSubrange(0..<secondChunkSize, with: sourceBytes.suffix(secondChunkSize))
writeIndex = secondChunkSize
}
}
availableBytes += data.count
}
@@ -75,7 +77,7 @@ public class AudioBuffer {
guard availableBytes >= bytesPerChunk else { return nil }
var chunkData = Data(capacity: bytesPerChunk)
// Check if we can copy in one block (no wrap-around)
if readIndex + bytesPerChunk <= maxBufferSize {
// one copy needed
@@ -85,19 +87,18 @@ public class AudioBuffer {
// two copies needed due to wrap-around
let firstChunkSize = maxBufferSize - readIndex
let secondChunkSize = bytesPerChunk - firstChunkSize
chunkData.append(contentsOf: buffer[readIndex..<maxBufferSize])
chunkData.append(contentsOf: buffer[0..<secondChunkSize])
readIndex = secondChunkSize
}
availableBytes -= bytesPerChunk
let packet = AudioPacket(
timestamp: Date(),
duration: chunkDuration,
peakAmplitude: 0.0,
rawAudioData: chunkData
)