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feat(apple): screen-audio sharing -- macOS ScreenCaptureKit, iOS ReplayKit

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Implement system/desktop audio sharing on the Apple clients, feeding the
existing SCREEN_AUDIO Opus -> AEAD -> UDP path via vc_stream_feed_pcm. No
C++/protocol/codec changes -- the core was already ready (the Windows-only
loopback is #ifdef VOICECAT_HAS_LOOPBACK; off Windows the stream just waits
for fed PCM). Audio only; video is dropped.

macOS (in-process):
- ScreenAudioCapture.swift drives an audio-only SCStream
  (excludesCurrentProcessAudio), converts Float32 -> int16 in the channel's
  mono/stereo mode, and calls feedPcm. Capture starts on the self
  .streamStarted event (effective config known then). Wired into
  MainWindowController.screenAudioClicked().

iOS (forward-to-host, single session):
- VoiceCatBroadcast: a ReplayKit Broadcast Upload Extension consumes
  .audioApp only, resamples to 48kHz int16 stereo (AVAudioConverter), and
  writes a shared App Group SPSC ring (BroadcastAudioRing.swift). It does
  not link libvoicecat.
- Host BroadcastAudioPump drains the ring (reacting to the extension's
  Darwin notifications) and feeds the SCREEN_AUDIO stream it owns, downmixing
  to mono when the channel is mono. Screen audio appears as a second stream
  of the same user; no credentials persisted. UI is RPSystemBroadcastPicker
  View in VoiceControlsView. Removes the speculative BroadcastCredentials.

Docs: voice.md s9, CLAUDE.md status, PROGRESS.md.
This commit is contained in:
Talon
2026-06-21 00:14:31 +02:00
parent 6ab78fa792
commit 8c90e250f0
17 changed files with 985 additions and 69 deletions
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12
clients/apple/macOS/VoiceCatMac.xcodeproj/project.pbxproj
View File

@@ -30,6 +30,7 @@
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AAAA00000000000000000048 /* UserPickerSheet.swift in Sources */ = {isa = PBXBuildFile; fileRef = AAAA00000000000000000047 /* UserPickerSheet.swift */; };
AAAA0000000000000000004A /* SettingsWindowController.swift in Sources */ = {isa = PBXBuildFile; fileRef = AAAA00000000000000000049 /* SettingsWindowController.swift */; };
AAAA0000000000000000004C /* ScreenAudioCapture.swift in Sources */ = {isa = PBXBuildFile; fileRef = AAAA0000000000000000004B /* ScreenAudioCapture.swift */; };
/* End PBXBuildFile section */
/* Begin PBXFileReference section */
@@ -42,6 +43,7 @@
AAAA00000000000000000018 /* ServerListStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ServerListStore.swift; sourceTree = "<group>"; };
AAAA00000000000000000019 /* ConnectWindowController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConnectWindowController.swift; sourceTree = "<group>"; };
AAAA0000000000000000001A /* MainWindowController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MainWindowController.swift; sourceTree = "<group>"; };
AAAA0000000000000000004B /* ScreenAudioCapture.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ScreenAudioCapture.swift; sourceTree = "<group>"; };
AAAA0000000000000000001B /* AddServerSheet.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AddServerSheet.swift; sourceTree = "<group>"; };
AAAA0000000000000000001C /* ServerIdentitySheet.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ServerIdentitySheet.swift; sourceTree = "<group>"; };
AAAA0000000000000000001D /* PasswordPromptSheet.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PasswordPromptSheet.swift; sourceTree = "<group>"; };
@@ -89,12 +91,21 @@
AAAA00000000000000000015 /* main.swift */,
AAAA00000000000000000016 /* AppDelegate.swift */,
AAAA00000000000000000004 /* Models */,
AAAA0000000000000000004D /* Audio */,
AAAA00000000000000000005 /* Windows */,
AAAA00000000000000000006 /* Sheets */,
);
path = VoiceCatMac;
sourceTree = "<group>";
};
AAAA0000000000000000004D /* Audio */ = {
isa = PBXGroup;
children = (
AAAA0000000000000000004B /* ScreenAudioCapture.swift */,
);
path = Audio;
sourceTree = "<group>";
};
AAAA00000000000000000004 /* Models */ = {
isa = PBXGroup;
children = (
@@ -231,6 +242,7 @@
AAAA00000000000000000046 /* PrivateMessageWindowController.swift in Sources */,
AAAA00000000000000000048 /* UserPickerSheet.swift in Sources */,
AAAA0000000000000000004A /* SettingsWindowController.swift in Sources */,
AAAA0000000000000000004C /* ScreenAudioCapture.swift in Sources */,
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runOnlyForDeploymentPostprocessing = 0;
};