awscdk-construct-scte-scheduler
Version:
AWS CDK Construct for scheduling SCTE-35 events using the MediaLive schedule API
31 lines (30 loc) • 1.49 kB
JavaScript
import { EventStreamCodec } from "../eventstream-codec/EventStreamCodec";
import { MessageDecoderStream } from "../eventstream-codec/MessageDecoderStream";
import { MessageEncoderStream } from "../eventstream-codec/MessageEncoderStream";
import { SmithyMessageDecoderStream } from "../eventstream-codec/SmithyMessageDecoderStream";
import { SmithyMessageEncoderStream } from "../eventstream-codec/SmithyMessageEncoderStream";
import { getChunkedStream } from "./getChunkedStream";
import { getMessageUnmarshaller } from "./getUnmarshalledStream";
export class EventStreamMarshaller {
eventStreamCodec;
utfEncoder;
constructor({ utf8Encoder, utf8Decoder }) {
this.eventStreamCodec = new EventStreamCodec(utf8Encoder, utf8Decoder);
this.utfEncoder = utf8Encoder;
}
deserialize(body, deserializer) {
const inputStream = getChunkedStream(body);
return new SmithyMessageDecoderStream({
messageStream: new MessageDecoderStream({ inputStream, decoder: this.eventStreamCodec }),
deserializer: getMessageUnmarshaller(deserializer, this.utfEncoder),
});
}
serialize(inputStream, serializer) {
return new MessageEncoderStream({
messageStream: new SmithyMessageEncoderStream({ inputStream, serializer }),
encoder: this.eventStreamCodec,
includeEndFrame: true,
});
}
}
export const eventStreamSerdeProvider = (options) => new EventStreamMarshaller(options);