Docs: Add spec for RTSP backchannel audio (talk-to-camera) feature#3
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mretallack wants to merge 4 commits into
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Docs: Add spec for RTSP backchannel audio (talk-to-camera) feature#3mretallack wants to merge 4 commits into
mretallack wants to merge 4 commits into
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mretallack
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May 12, 2026
mretallack
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- requirements.md: User stories for push-to-talk, detection, codec selection
- design.md: Architecture with BackchannelClient, G711Encoder, BackchannelManager
- tasks.md: 10 implementation tasks in 3 phases
- requirements.md: User stories for push-to-talk, detection, codec selection - design.md: Architecture with BackchannelClient, G711Encoder, BackchannelManager - tasks.md: 10 implementation tasks in 3 phases
…t tests - Changed from push-to-talk to toggle (tap on/tap off) - Floating mic icon top-right, crossed-out when inactive - Auto-disable on app defocus (onPause) - Added testing strategy: unit tests with high coverage, integration test - Tests in same location as existing, run in CI
- G711Encoder: μ-law and A-law encoding for audio - RtpPacket: RTP packet construction with TCP interleaved framing - BackchannelClient: RTSP signaling (DESCRIBE/SETUP/PLAY/TEARDOWN) with Digest auth, SDP parsing for sendonly tracks, handles interleaved RTP frames during response reading - BackchannelManager: coordinates AudioRecord capture, encoding, and RTP sending on background thread - UI: floating mic button (top-right), toggle on/off, auto-stops on app defocus, mutes playback while mic active to prevent feedback - Uses VOICE_COMMUNICATION audio source for echo cancellation - 51 new unit tests, 1 integration test - RECORD_AUDIO permission added to manifest
- Mute VLC mediaPlayer volume immediately (not just on next play()) - Skip interleaved RTP frames when reading RTSP responses - Reuse auth nonce across DESCRIBE/SETUP/PLAY requests - Add VOICE_COMMUNICATION audio source for echo cancellation - Increase mic gain to 8x for audible output
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