detector_utils.ts

/**
 * @license
 * Copyright 2021 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */

import {DEFAULT_BLAZEPOSE_ESTIMATION_CONFIG, DEFAULT_BLAZEPOSE_MODEL_CONFIG} from './constants';
import {BlazePoseMediaPipeEstimationConfig, BlazePoseMediaPipeModelConfig} from './types';

export function validateModelConfig(modelConfig: BlazePoseMediaPipeModelConfig):
    BlazePoseMediaPipeModelConfig {
  if (modelConfig == null) {
    return {...DEFAULT_BLAZEPOSE_MODEL_CONFIG};
  }

  const config: BlazePoseMediaPipeModelConfig = {...modelConfig};

  config.runtime = 'mediapipe';

  if (config.enableSegmentation == null) {
    config.enableSegmentation =
        DEFAULT_BLAZEPOSE_MODEL_CONFIG.enableSegmentation;
  }

  if (config.enableSmoothing == null) {
    config.enableSmoothing = DEFAULT_BLAZEPOSE_MODEL_CONFIG.enableSmoothing;
  }

  if (config.smoothSegmentation == null) {
    config.smoothSegmentation =
        DEFAULT_BLAZEPOSE_MODEL_CONFIG.smoothSegmentation;
  }

  if (config.modelType == null) {
    config.modelType = DEFAULT_BLAZEPOSE_MODEL_CONFIG.modelType;
  }

  return config;
}

export function validateEstimationConfig(
    estimationConfig: BlazePoseMediaPipeEstimationConfig):
    BlazePoseMediaPipeEstimationConfig {
  if (estimationConfig == null) {
    return {...DEFAULT_BLAZEPOSE_ESTIMATION_CONFIG};
  }

  const config = {...estimationConfig};

  if (config.maxPoses == null) {
    config.maxPoses = 1;
  }

  if (config.maxPoses <= 0) {
    throw new Error(`Invalid maxPoses ${config.maxPoses}. Should be > 0.`);
  }

  if (config.maxPoses > 1) {
    throw new Error(
        'Multi-pose detection is not implemented yet. Please set maxPoses ' +
        'to 1.');
  }

  if (config.flipHorizontal == null) {
    config.flipHorizontal = DEFAULT_BLAZEPOSE_ESTIMATION_CONFIG.flipHorizontal;
  }

  return config;
}