| 1 | import type * as polly from "@distilled.cloud/aws/polly"; |
| 2 | import type * as Effect from "effect/Effect"; |
| 3 | import * as Binding from "../../Binding.ts"; |
| 4 | |
| 5 | /** |
| 6 | * Runtime binding for `polly:StartSpeechSynthesisStream` — bidirectional |
| 7 | * streaming synthesis: send text incrementally as `TextEvent`s on the input |
| 8 | * `ActionStream` and receive `AudioEvent` chunks on the output `EventStream` |
| 9 | * as they become available. |
| 10 | * |
| 11 | * The binding takes no arguments and grants the function |
| 12 | * `polly:StartSpeechSynthesisStream`. Provide the implementation with |
| 13 | * `Effect.provide(AWS.Polly.StartSpeechSynthesisStreamHttp)`. |
| 14 | * |
| 15 | * NOTE: the distilled HTTP transport does not yet support bidirectional |
| 16 | * (input) event-stream request bodies — a live call currently hangs waiting |
| 17 | * for response headers (probed 2026-07; same transport gap leaves |
| 18 | * transcribe-streaming and lex StartConversation unbound). Prefer |
| 19 | * `SynthesizeSpeech` (request-response) until distilled core ships |
| 20 | * event-stream request support. |
| 21 | * |
| 22 | * ### Streaming Synthesis |
| 23 | * **Example:** Stream text in, collect audio out |
| 24 | * ```typescript |
| 25 | * // init |
| 26 | * const startSpeechSynthesisStream = |
| 27 | * yield* AWS.Polly.StartSpeechSynthesisStream(); |
| 28 | * |
| 29 | * // runtime |
| 30 | * const result = yield* startSpeechSynthesisStream({ |
| 31 | * Engine: "generative", |
| 32 | * OutputFormat: "mp3", |
| 33 | * VoiceId: "Matthew", |
| 34 | * ActionStream: Stream.make( |
| 35 | * { TextEvent: { Text: "Hello from Alchemy." } }, |
| 36 | * { CloseStreamEvent: {} }, |
| 37 | * ), |
| 38 | * }); |
| 39 | * const events = yield* Stream.runCollect(result.EventStream!); |
| 40 | * const audioBytes = Array.from(events) |
| 41 | * .flatMap((event) => (event.AudioEvent?.AudioChunk ? [event.AudioEvent.AudioChunk] : [])) |
| 42 | * .reduce((total, chunk) => total + chunk.length, 0); |
| 43 | * ``` |
| 44 | * |
| 45 | * @binding |
| 46 | */ |
| 47 | export interface StartSpeechSynthesisStream extends Binding.Service< |
| 48 | StartSpeechSynthesisStream, |
| 49 | "AWS.Polly.StartSpeechSynthesisStream", |
| 50 | () => Effect.Effect< |
| 51 | ( |
| 52 | request: polly.StartSpeechSynthesisStreamInput, |
| 53 | ) => Effect.Effect< |
| 54 | polly.StartSpeechSynthesisStreamOutput, |
| 55 | polly.StartSpeechSynthesisStreamError |
| 56 | > |
| 57 | > |
| 58 | > {} |
| 59 | export const StartSpeechSynthesisStream = |
| 60 | Binding.Service<StartSpeechSynthesisStream>( |
| 61 | "AWS.Polly.StartSpeechSynthesisStream", |
| 62 | ); |