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add deepgram streaming adapter with reconnection logic

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leonardotrapani
2026-02-01 01:47:12 +01:00
parent 5f614b19c5
commit e9499b0d6b
4 changed files with 855 additions and 2 deletions
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@@ -346,4 +346,17 @@ Started: Sun Feb 1 12:22:47 AM CET 2026
- DefaultModel(Transcription) returns 'nova-3'
- Registered in provider.init()
- Comprehensive test file created: deepgram_test.go
- All tests passing, typecheck passes
- All tests passing, typecheck passes
### Task 34: Create Deepgram StreamingAdapter
- Created `internal/transcriber/adapter_deepgram.go`
- DeepgramAdapter struct: endpoint, apiKey, model, language, conn, resultsCh, mutex, ctx/cancel, WaitGroup
- Start(): connects to wss://api.deepgram.com/v1/listen with Authorization: Token header
- Query params: model, language, encoding=linear16, sample_rate=16000, channels=1, interim_results=true, smart_format=true, punctuate=true
- Language conversion via language.ToProviderFormat(lang, "deepgram")
- SendChunk(): sends raw binary audio (websocket.BinaryMessage, not base64 like ElevenLabs)
- readLoop goroutine: parses Metadata, Results (interim + final), Error, UtteranceEnd, SpeechStarted messages
- Close(): cancels context, sends close frame, waits for reader goroutine
- Added reconnection logic (maxRetries=3, exponential backoff 1s, 2s, 4s) matching ElevenLabs pattern
- Comprehensive tests with mock WebSocket server
- All tests passing with -race flag, typecheck passes