Preserve iOS screen audio during stream startup

2026-09-27 17:56:18 +02:00
parent 3dbe763598
commit 4bad264605
6 changed files with 65 additions and 15 deletions
@@ -26,6 +26,7 @@ internal sealed class BroadcastAudioPump : IAsyncDisposable
    internal bool IsActive => active;
 #if DEBUG
    internal bool IsMappingOpen => view is not null;
+    internal long EncodedPackets => streamId == 0 ? 0 : client?.Audio.GetLocalDiagnostics(streamId).EncodedPackets ?? 0;
 #endif

    internal void Start(VoiceCatClient owner)
@@ -82,7 +83,13 @@ internal sealed class BroadcastAudioPump : IAsyncDisposable
                try { owner.StopStream(stream.StreamId); } catch (Exception exception) when (exception is IOException or InvalidOperationException) { }
                return;
            }
-            streamId = stream.StreamId; pages.Write(32, pages.ReadUInt64(24)); SetActive(true);
+            // Keep the newest 120 ms captured during stream negotiation. This covers the
+            // largest codec frame plus the input buffer target; dropping through the latest
+            // write loses short sounds before the first drain can feed them.
+            ulong latestWrite = pages.ReadUInt64(24);
+            ulong earliest = latestWrite > (ulong)(Frame * 12) ? latestWrite - (ulong)(Frame * 12) : 0;
+            pages.Write(32, Math.Max(pages.ReadUInt64(32), earliest));
+            streamId = stream.StreamId; SetActive(true);
        }
        ulong write = pages.ReadUInt64(24), read = pages.ReadUInt64(32);
        if (write - read > Capacity) read = write - Capacity;