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cap vlc range cache memory

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dirtydishes 2026-05-25 19:44:22 -04:00
parent b016d5a910
commit 73eeb09eda
5 changed files with 187 additions and 3 deletions
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28
Dreamio/ProgressiveHTTPRangeCache.swift
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@ -115,7 +115,19 @@ final class SparseHTTPByteRangeStore {
func evict(keeping window: HTTPByteRange) {
lock.withLock {
segments.removeAll { !$0.range.overlapsOrTouches(window) }
segments = segments.compactMap { segment in
guard segment.range.overlapsOrTouches(window) else {
return nil
}
let start = max(segment.range.start, window.start)
let end = min(segment.range.end, window.end)
guard start <= end else {
return nil
}
let lower = Int(start - segment.range.start)
let upper = Int(end - segment.range.start + 1)
return Segment(range: HTTPByteRange(start: start, end: end), data: segment.data.subdata(in: lower..<upper))
}
}
}
@ -240,6 +252,7 @@ final class ProgressiveHTTPRangeCacheSession {
let contentLength: Int64
let durationProvider: () -> TimeInterval
private let prefetchChunkSize: Int64 = 1_048_576
private let responseChunkSize: Int64 = 1_048_576
private var prefetchTask: Task<Void, Never>?
init(fetcher: HTTPRangeRemoteFetcher, contentLength: Int64, durationProvider: @escaping () -> TimeInterval) {
@ -266,6 +279,14 @@ final class ProgressiveHTTPRangeCacheSession {
return store.data(for: bounded) ?? data
}
func responseRange(for requestedRange: HTTPByteRange) -> HTTPByteRange {
let bounded = clamp(requestedRange)
return HTTPByteRange(
start: bounded.start,
end: min(bounded.end, bounded.start + responseChunkSize - 1)
)
}
func prefetch(aroundByteOffset offset: Int64) {
prefetchTask?.cancel()
let window = targetWindow(aroundByteOffset: offset)
@ -446,12 +467,13 @@ final class ProgressiveHTTPRangeCacheServer {
let requestedRange = parseRangeHeader(in: requestText, contentLength: session.contentLength)
?? HTTPByteRange(start: 0, end: min(session.contentLength - 1, 1_048_575))
let responseRange = session.responseRange(for: requestedRange)
do {
let data = try await session.data(for: requestedRange)
let data = try await session.data(for: responseRange)
let headers = [
"Accept-Ranges": "bytes",
"Content-Length": "\(data.count)",
"Content-Range": "bytes \(requestedRange.start)-\(requestedRange.end)/\(session.contentLength)",
"Content-Range": "bytes \(responseRange.start)-\(responseRange.end)/\(session.contentLength)",
"Content-Type": "application/octet-stream",
"Connection": "close"
]