aws-amplify#Predictions JavaScript Examples

The following examples show how to use aws-amplify#Predictions. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: Note.js    From aws-amplify-quick-notes with MIT No Attribution 5 votes vote down vote up 
NotesComponent = props => {
  const [showEditor, setShowEditor] = useState(false);

  const playAudio = async () => {
    const result = await Predictions.convert({
      textToSpeech: {
        source: {
          text: props.text
        }
      }
    });

    const audioCtx = new AudioContext();
    const source = audioCtx.createBufferSource();

    audioCtx.decodeAudioData(
      result.audioStream,
      buffer => {
        source.buffer = buffer;
        source.connect(audioCtx.destination);
        source.start(0);
      },
      error => console.log(error)
    );
  };

  return (
    <Note>
      <Info>
        <Title>{props.title}</Title>
        <Text>{props.text}</Text>
      </Info>
      <Divider />
      <NoteActions>
        <Icon onClick={() => playAudio()}>
          <FaPlay />
        </Icon>
        <Icon onClick={() => setShowEditor(true)}>
          <FaRegEdit />
        </Icon>
        <Icon>
          <FaRegTrashAlt onClick={props.onDelete} />
        </Icon>
      </NoteActions>

      {showEditor && (
        <RecordingEditor
          title={props.title}
          text={props.text}
          onDismiss={() => {
            setShowEditor(false);
          }}
          onSave={props.onSaveChanges}
        />
      )}
    </Note>
  );
}
Example #2
Source File: Record.js    From aws-amplify-quick-notes with MIT No Attribution 4 votes vote down vote up 
RecordComponent = props => {
  const [isRecording, setIsRecording] = useState(false);
  const [showRecordingEditor, setShowRecordingEditor] = useState(false);
  const [recordingText, setRecordingText] = useState("");
  const [isConverting, setIsConverting] = useState("");
  const [micStream, setMicStream] = useState();
  const [audioBuffer] = useState(
    (function() {
      let buffer = [];
      function add(raw) {
        buffer = buffer.concat(...raw);
        return buffer;
      }
      function newBuffer() {
        console.log("reseting buffer");
        buffer = [];
      }

      return {
        reset: function() {
          newBuffer();
        },
        addData: function(raw) {
          return add(raw);
        },
        getData: function() {
          return buffer;
        }
      };
    })()
  );

  const startRecording = async () => {
    const stream = await window.navigator.mediaDevices.getUserMedia({
      video: false,
      audio: true
    });
    const startMic = new mic();

    startMic.setStream(stream);
    startMic.on("data", chunk => {
      var raw = mic.toRaw(chunk);
      if (raw == null) {
        return;
      }
      audioBuffer.addData(raw);
    });

    setMicStream(startMic);
    setIsRecording(true);
  };

  const stopRecording = async () => {
    micStream.stop();
    setIsRecording(false);
    setIsConverting(true);

    const buffer = audioBuffer.getData();
    const result = await Predictions.convert({
      transcription: {
        source: {
          bytes: buffer
        }
      }
    });

    setMicStream(null);
    audioBuffer.reset();
    setRecordingText(result.transcription.fullText);
    setIsConverting(false);
    setShowRecordingEditor(true);
  };

  return (
    <Container>
      <div
        css={css`
          position: relative;
          justify-content: center;
          align-items: center;
          width: 120px;
          height: 120px;
        `}
      >
        <div
          css={[
            css`
              width: 100%;
              height: 100%;
              top: 0;
              left: 0;
              position: absolute;

              border-radius: 50%;
              background-color: #74b49b;
            `,
            isRecording || isConverting
              ? css`
                  animation: ${pulse} 1.5s ease infinite;
                `
              : {}
          ]}
        />
        <div
          css={css`
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            position: absolute;
            border-radius: 50%;
            background-color: #74b49b;
            display: flex;
            cursor: pointer;
          `}
          onClick={() => {
            if (!isRecording) {
              startRecording();
            } else {
              stopRecording();
            }
          }}
        >
          {isConverting ? (
            <FaMicrophoneAltSlash
              size={50}
              style={{ margin: "auto" }}
            />
          ) : isRecording ? (
            <FaMicrophone
              size={50}
              style={{ margin: "auto" }}
            />
          ) : (
            <FaMicrophoneAlt
              size={50}
              style={{ margin: "auto" }}
            />
          )}
        </div>
      </div>
      {showRecordingEditor && (
        <RecordingEditor
          text={recordingText}
          onDismiss={() => {
            setShowRecordingEditor(false);
          }}
          onSave={async data => {
            await API.graphql(graphqlOperation(createNote, { input: data }));
            props.setTabIndex(0);
          }}
        />
      )}
    </Container>
  );
}