arazzo: 1.0.1
info:
  title: Microsoft Windows 10 Media Capture Photo
  summary: Pick a camera, initialize a capture session, start the preview, and capture a photo to a file.
  description: >-
    A camera capture flow built on the Windows.Media.Capture namespace. The
    workflow enumerates VideoCapture devices, selects the first camera,
    initializes a MediaCapture session for it, starts the preview stream, and
    captures a photo to the supplied output path with the chosen encoding. Every
    step inlines its request and documents the response status it keys on so the
    flow can be executed without opening the OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: mediaCaptureApi
  url: ../openapi/microsoft-windows-10-media-capture-openapi.yml
  type: openapi
workflows:
- workflowId: capture-photo
  summary: Initialize a camera session and capture a photo to a file.
  description: >-
    Selects the first video capture device, initializes a capture session,
    starts the preview, and captures a photo to the requested output path.
  inputs:
    type: object
    required:
    - outputPath
    properties:
      outputPath:
        type: string
        description: File path the captured photo is written to.
      encodingFormat:
        type: string
        description: Image encoding format for the captured photo.
        enum:
        - Jpeg
        - Png
        - Bmp
        - Tiff
        default: Jpeg
  steps:
  - stepId: listCameras
    description: >-
      Enumerate available video capture devices and capture the first camera's
      device id.
    operationId: listCaptureDevices
    parameters:
    - name: deviceClass
      in: query
      value: VideoCapture
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      videoDeviceId: $response.body#/0/id
      cameraName: $response.body#/0/name
  - stepId: initializeSession
    description: >-
      Initialize a video-only MediaCapture session bound to the selected camera.
    operationId: initializeMediaCapture
    requestBody:
      contentType: application/json
      payload:
        videoDeviceId: $steps.listCameras.outputs.videoDeviceId
        streamingCaptureMode: Video
        sharingMode: ExclusiveControl
        photoCaptureSource: Auto
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      sessionId: $response.body#/id
      state: $response.body#/state
  - stepId: startPreview
    description: >-
      Start the camera preview stream for the initialized session before
      capturing.
    operationId: startPreview
    parameters:
    - name: sessionId
      in: path
      value: $steps.initializeSession.outputs.sessionId
    successCriteria:
    - condition: $statusCode == 200
  - stepId: capturePhoto
    description: >-
      Capture a photo to the supplied output path and capture the resulting file
      path and dimensions.
    operationId: capturePhoto
    parameters:
    - name: sessionId
      in: path
      value: $steps.initializeSession.outputs.sessionId
    requestBody:
      contentType: application/json
      payload:
        encodingFormat: $inputs.encodingFormat
        outputPath: $inputs.outputPath
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      filePath: $response.body#/filePath
      width: $response.body#/width
      height: $response.body#/height
      sizeInBytes: $response.body#/sizeInBytes
  outputs:
    sessionId: $steps.initializeSession.outputs.sessionId
    filePath: $steps.capturePhoto.outputs.filePath
    width: $steps.capturePhoto.outputs.width
    height: $steps.capturePhoto.outputs.height