services/video_capture/public/mojom/device_factory_provider.mojom

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module video_capture.mojom;

[EnableIf=is_chromeos]
import "components/chromeos_camera/common/mjpeg_decode_accelerator.mojom";
import "services/video_capture/public/mojom/device_factory.mojom";
import "services/video_capture/public/mojom/video_source_provider.mojom";

[EnableIf=is_chromeos]
interface AcceleratorFactory {
  // Creates a new JpegDecodeAccelerator and binds it to |jda|.
  CreateJpegDecodeAccelerator(
      chromeos_camera.mojom.MjpegDecodeAccelerator& jda);
};

// Entry point to the Video Capture Service API.
// The factory provides access to the capture devices connected to the system.
// By using command-line switches, it is possible to replace this with a "fake"
// factory, which provides access to fake devices that generates test frames.
// The video capture supports gpu accelerated decoding of MJPEG frames
// delivered by camera devices, but to do it requires InjectGpuDependencies()
// to be called once before any call to ConnectToDeviceFactory() is made.
// Calling InjectGpuDependencies() is optional. If it is not called, MJPEG
// decoding will be performed without gpu acceleration.
// TODO(chfremer): Consider renaming this to VideoCaptureService.
interface DeviceFactoryProvider  {
  [EnableIf=is_chromeos]
  InjectGpuDependencies(AcceleratorFactory accelerator_factory);

  // Legacy API. Supports one client per device.
  ConnectToDeviceFactory(DeviceFactory& request);

  // Current API. Supports multiple clients per source.
  ConnectToVideoSourceProvider(VideoSourceProvider& request);

  // Lets the service to close all connections and ask the service_manager to be
  // shut down.
  ShutdownServiceAsap();

  // Sets a retry count that is used by the service for logging UMA events in
  // the context of investigation for https://crbug.com/643068.
  SetRetryCount(int32 count);
};