Recompute `lastIsFolded`; if it changed, push a CommunicationsDevicesChanged event so JS can react immediately (hide earpiece, auto-flip UI selection)

H.264 Annex-B emulation prevention: insert an emulation_prevention_three_byte (0x03) so the output never contains 00 00 00 / 00 00 01 / 00 00 02 / 00

Inverse of EpbEscape: drop each 0x03 that follows 00 00 and precedes a byte <= 0x03. Exactly inverts EpbEscape for any input EpbEscape produced.

Find the first audio track on a list of receivers. * Returns { pcId, trackId } or null. Mirrors CallRecorder._findAudioTrack.

Default position for the i/speedometer view. * - Fullscreen: anchor at the actual top-left of the phone * screen. The parent container i

Conference-mode mixed-remote poll. Polls each per-participant queue once (non-blocking after the first to keep the writer's cadence near 100 Hz), sums

Shared encoder/muxer setup — called from both start() and startConference(). Same MediaCodec Opus encoder, same OGG MediaMuxer, same OUTPUT_SAMPLE_R

Shared mic setup — pulls AudioRecord parameters into one place so both start() and startConference() get the same VOICE_COMMUNICATION source and buf

* Parse pc.getStats() into the diagnostic structure that the metro.log * DIAGNOSTIC lines and the UI "Media" panel both consume. * * Re

Attach a remote audio track mid-recording. Returns true if a new ConferenceRemote was created, false if the participantId is already tracked or the

Synthesise the address Telecom hands to BT-HFP. Sylk has no phone numbers, so the goal is a tel:-shaped URI whose body the kit can render — alphanumer

Append a single msg_id to the comma-separated unread_messages column for a contact, deduping against any id that is already present. Empty existing ->

Detect a narrow (folded cover) screen and rescale the central Sylk logo + Accept/Decline buttons so the overlay fits. We base the check on the smalles

Look up the {@link Connection} registered with Telecom for this call (RNCallKeep's VoiceConnectionService for outgoing calls; SylkTelecom's own Connec

Build the JSON ourselves with StringBuilder rather than pulling in org.json. Same shape as `getLastPeaksJson()` documents. Also downsamples to MAX_PEA

Build the spectrumCodec.js metadata JSON from the captured frames. Shape: {"v":1,"rate":10,"bands":16,"count":N,"lo":-100,"hi":0, "data":"<b

Whether we may call permission-gated Telecom read APIs such as {@link TelecomManager#getPhoneAccount}. Telecom enforces READ_PHONE_NUMBERS from API 30

Capture the current AudioManager mode into {@link #preCallMode}. Call from any native code path that observes the very first signal of a new call (typ