media_perception/mojom/device_management.mojom

// Copyright 2018 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.
//
// Next MinVersion: 1

module chromeos.media_perception.mojom;

[Extensible]
enum PixelFormat {
  FORMAT_UNKNOWN = 0,
  I420 = 1,
  MJPEG = 2,
};

struct VideoStreamParams {
  uint32 width_in_pixels@0;
  uint32 height_in_pixels@1;
  float frame_rate_in_frames_per_second@2;
  PixelFormat pixel_format@3;
};

struct VideoDevice {
  // Unique obfuscated id for this video device.
  string id@0;

  // Human readable name for the video device.
  string? display_name@1;
  string? model_id@2;

  array<VideoStreamParams> supported_configurations@3;

  // Specifies a desired or currently selected configuration for a particular
  // device.
  VideoStreamParams? configuration@4;

  bool in_use@5;
};

// Wrapper on the VideoDevice object so that we can add virtual device specific
// parameters if necessary.
struct VirtualVideoDevice {
  VideoDevice video_device@0;
};

// Sample formats that CrAS supports.
// Full list: https://cs.corp.google.com/chromeos_public/src/third_party/adhd/cras/src/common/cras_audio_format.h
[Extensible]
enum SampleFormat {
  SND_PCM_UNKNOWN_FORMAT = 0,

  // PCM signed 32 bit, little endian.
  SND_PCM_FORMAT_S32_LE = 1,

  // PCM signed 16 bit, little endian.
  SND_PCM_FORMAT_S16_LE = 2,
};

struct AudioStreamParams {
  float frequency_in_hz@0;
  int32 num_channels@1;
  int32 frame_size@2;
  SampleFormat sample_format@3;
};

struct AudioDevice {
  // Unique obfuscated id for this audio device.
  string id@0;

  // Human readable name of the audio device.
  string? display_name@1;

  array<AudioStreamParams> supported_configurations@2;

  // Specifies a desired or currently selected configuration for a particular
  // device.
  AudioStreamParams? configuration@3;
};

[Extensible]
enum DeviceType {
  TYPE_UNKNOWN = 0,
  VIDEO = 1 ,
  AUDIO = 2,
  VIRTUAL_VIDEO = 3,
};

struct DeviceTemplate {
  string template_name@0;

  DeviceType device_type@1;
};