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ios: default in-call audio to the loudspeaker (AVAudioSession) at build time

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Calls were routing to the quiet earpiece. ios-patch.sh now runs a Node helper (Node 20 is
already in the build env) that injects an AVAudioSession .playAndRecord/.voiceChat category with
.defaultToSpeaker + Bluetooth into the generated AppDelegate. Tolerant: exits 0 and no-ops if the
template differs, so it can never fail the Codemagic build. Verified locally against the Cap 7
AppDelegate template — injects correctly and is idempotent. First pass; if WebRTC re-grabs the
session mid-call on device, a follow-up plugin will re-assert .overrideOutputAudioPort(.speaker).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Sravan
2026-07-19 16:18:52 +05:30
parent f2b965bd3d
commit 134cb8999d
2 changed files with 48 additions and 0 deletions
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mobile/scripts/inject-audio.js
+36
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@@ -0,0 +1,36 @@
// Inject an AVAudioSession "default to the loudspeaker" setup into the freshly-generated Capacitor iOS
// AppDelegate, so calls don't route to the quiet earpiece. Run on Codemagic (macOS) from ios-patch.sh:
// node mobile/scripts/inject-audio.js mobile/ios/App/App/AppDelegate.swift
// TOLERANT by design: if the file is missing or the template doesn't match, it prints a note and exits 0
// so it can NEVER fail the build. First-pass fix — if iOS WebRTC re-grabs the session mid-call on device,
// we follow up with a plugin that re-asserts .overrideOutputAudioPort(.speaker).
const fs = require('fs');
const p = process.argv[2];
if (!p || !fs.existsSync(p)) { console.log(' (AppDelegate.swift not found — AVAudioSession patch skipped)'); process.exit(0); }
try {
let s = fs.readFileSync(p, 'utf8');
if (s.includes('AVAudioSession')) { console.log(' AVAudioSession already patched'); process.exit(0); }
const orig = s;
if (s.includes('import Capacitor')) s = s.replace('import Capacitor', 'import Capacitor\nimport AVFoundation');
else if (s.includes('import UIKit')) s = s.replace('import UIKit', 'import UIKit\nimport AVFoundation');
const inject = [
' // Default call audio to the loudspeaker (iOS uses the quiet earpiece otherwise).',
' do {',
' let audioSession = AVAudioSession.sharedInstance()',
' try audioSession.setCategory(.playAndRecord, mode: .voiceChat, options: [.defaultToSpeaker, .allowBluetooth, .allowBluetoothA2DP])',
' try audioSession.setActive(true)',
' } catch { }',
'',
].join('\n');
const m = s.match(/func\s+application\([^)]*didFinishLaunchingWithOptions[^)]*\)\s*->\s*Bool\s*\{[^\n]*\n/);
if (m) { const idx = m.index + m[0].length; s = s.slice(0, idx) + inject + s.slice(idx); }
if (s !== orig && s.includes('AVAudioSession')) {
fs.writeFileSync(p, s);
console.log(' AVAudioSession default-to-speaker injected into AppDelegate');
} else {
console.log(' (AppDelegate pattern not matched — AVAudioSession patch skipped)');
}
} catch (e) {
console.log(' (AVAudioSession patch error, skipped: ' + (e && e.message) + ')');
}
process.exit(0);
mobile/scripts/ios-patch.sh
+12
View File
@@ -38,6 +38,18 @@ set_str CFBundleVersion "$BUILD_NO"
# Allow the webview to load our HTTPS origin (we do NOT enable arbitrary cleartext).
"$PB" -c "Delete :NSAppTransportSecurity" "$PLIST" 2>/dev/null || true
# ── Default in-call audio to the LOUDSPEAKER (AVAudioSession) ──────────────────────────────────────
# Without this, iOS routes WebRTC call audio to the quiet EARPIECE. A Node helper (Node 20 is already set
# up for this build) injects an AVAudioSession category into the generated AppDelegate so calls default to
# the speaker (headphones/Bluetooth still win when connected). The helper is tolerant and exits 0 even if
# the template differs, so it NEVER fails the build. First-pass fix — if WebRTC re-grabs the session
# mid-call on device, we follow up with a plugin that re-asserts .overrideOutputAudioPort(.speaker).
AD="mobile/ios/App/App/AppDelegate.swift"
if [ -f "$AD" ]; then
echo "Patching AppDelegate audio session"
node "$(dirname "$0")/inject-audio.js" "$AD" || echo " (AVAudioSession patch skipped — non-fatal)"
fi
echo "Info.plist patched:"
"$PB" -c "Print :NSCameraUsageDescription" "$PLIST"
"$PB" -c "Print :NSMicrophoneUsageDescription" "$PLIST"