@tensorflow/tfjs-data
Version:
TensorFlow Data API in JavaScript
135 lines • 18.9 kB
JavaScript
/**
* @license
* Copyright 2019 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
*
* http://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.
*
* =============================================================================
*/
// tslint:disable-next-line: no-imports-from-dist
import { ALL_ENVS, BROWSER_ENVS, describeWithFlags, NODE_ENVS, registerTestEnv } from '@tensorflow/tfjs-core/dist/jasmine_util';
// Provide fake video stream
export function setupFakeVideoStream() {
const width = 100;
const height = 200;
const canvasElement = document.createElement('canvas');
const ctx = canvasElement.getContext('2d');
ctx.fillStyle = 'rgb(1,2,3)';
ctx.fillRect(0, 0, width, height);
// tslint:disable-next-line:no-any
const stream = canvasElement.captureStream(60);
navigator.mediaDevices.getUserMedia = async () => {
return stream;
};
}
export async function replaceHTMLVideoElementSource(videoElement) {
const source = document.createElement('source');
// tslint:disable:max-line-length
source.src =
'data:video/mp4;base64,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';
source.type = 'video/mp4';
videoElement.srcObject = null;
videoElement.appendChild(source);
videoElement.play();
if (videoElement.readyState < 2) {
await new Promise(resolve => {
videoElement.addEventListener('loadeddata', () => resolve());
});
}
}
// Register backends.
registerTestEnv({ name: 'cpu', backendName: 'cpu' });
registerTestEnv({
name: 'webgl2',
backendName: 'webgl',
flags: {
'WEBGL_VERSION': 2,
'WEBGL_CPU_FORWARD': false,
'WEBGL_SIZE_UPLOAD_UNIFORM': 0
}
});
export const MEDIA_ENVS = {
predicate: (env) => BROWSER_ENVS.predicate(env)
&& navigator.mediaDevices != null
};
export function describeAllEnvs(testName, tests) {
describeWithFlags(testName, ALL_ENVS, () => {
tests();
});
}
export function describeBrowserEnvs(testName, tests) {
describeWithFlags(testName, BROWSER_ENVS, () => {
tests();
});
}
export function describeNodeEnvs(testName, tests) {
describeWithFlags(testName, NODE_ENVS, () => {
tests();
});
}
/**
* Testing Utilities for browser audio stream.
*/
export function setupFakeAudioStream() {
navigator.mediaDevices.getUserMedia = async () => {
const stream = new MediaStream();
return stream;
};
// tslint:disable-next-line:no-any
window.AudioContext = FakeAudioContext;
}
export class FakeAudioContext {
constructor() {
this.sampleRate = 44100;
}
static createInstance() {
return new FakeAudioContext();
}
createMediaStreamSource() {
return new FakeMediaStreamAudioSourceNode();
}
createAnalyser() {
return new FakeAnalyser();
}
close() { }
}
export class FakeAudioMediaStream {
constructor() { }
getTracks() {
return [];
}
}
class FakeMediaStreamAudioSourceNode {
constructor() { }
connect(node) { }
}
class FakeAnalyser {
constructor() {
this.x = 0;
}
getFloatFrequencyData(data) {
const xs = [];
for (let i = 0; i < this.fftSize / 2; ++i) {
xs.push(this.x++);
}
data.set(new Float32Array(xs));
}
getFloatTimeDomainData(data) {
const xs = [];
for (let i = 0; i < this.fftSize / 2; ++i) {
xs.push(-(this.x++));
}
data.set(new Float32Array(xs));
}
disconnect() { }
}
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All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n *\n * =============================================================================\n */\n\n// tslint:disable-next-line: no-imports-from-dist\nimport {ALL_ENVS, BROWSER_ENVS, Constraints, describeWithFlags, NODE_ENVS, registerTestEnv} from '@tensorflow/tfjs-core/dist/jasmine_util';\n\n// Provide fake video stream\nexport function setupFakeVideoStream() {\n  const width = 100;\n  const height = 200;\n  const canvasElement = document.createElement('canvas');\n  const ctx = canvasElement.getContext('2d');\n  ctx.fillStyle = 'rgb(1,2,3)';\n  ctx.fillRect(0, 0, width, height);\n  // tslint:disable-next-line:no-any\n  const stream = (canvasElement as any).captureStream(60);\n  navigator.mediaDevices.getUserMedia = async () => {\n    return stream;\n  };\n}\n\nexport async function replaceHTMLVideoElementSource(\n    videoElement: HTMLVideoElement) {\n  const source = document.createElement('source');\n  // tslint:disable:max-line-length\n  source.src =\n      'data:video/mp4;base64,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';\n  source.type = 'video/mp4';\n  videoElement.srcObject = null;\n  videoElement.appendChild(source);\n  videoElement.play();\n\n  if (videoElement.readyState < 2) {\n    await new Promise<void>(resolve => {\n      videoElement.addEventListener('loadeddata', () => resolve());\n    });\n  }\n}\n\n// Register backends.\nregisterTestEnv({name: 'cpu', backendName: 'cpu'});\nregisterTestEnv({\n  name: 'webgl2',\n  backendName: 'webgl',\n  flags: {\n    'WEBGL_VERSION': 2,\n    'WEBGL_CPU_FORWARD': false,\n    'WEBGL_SIZE_UPLOAD_UNIFORM': 0\n  }\n});\n\nexport const MEDIA_ENVS: Constraints = {\n  predicate: (env) => BROWSER_ENVS.predicate(env)\n    && navigator.mediaDevices != null\n};\n\nexport function describeAllEnvs(testName: string, tests: () => void) {\n  describeWithFlags(testName, ALL_ENVS, () => {\n    tests();\n  });\n}\n\nexport function describeBrowserEnvs(testName: string, tests: () => void) {\n  describeWithFlags(testName, BROWSER_ENVS, () => {\n    tests();\n  });\n}\n\nexport function describeNodeEnvs(testName: string, tests: () => void) {\n  describeWithFlags(testName, NODE_ENVS, () => {\n    tests();\n  });\n}\n\n/**\n * Testing Utilities for browser audio stream.\n */\nexport function setupFakeAudioStream() {\n  navigator.mediaDevices.getUserMedia = async () => {\n    const stream = new MediaStream();\n    return stream;\n  };\n  // tslint:disable-next-line:no-any\n  (window as any).AudioContext = FakeAudioContext;\n}\n\nexport class FakeAudioContext {\n  readonly sampleRate = 44100;\n\n  static createInstance() {\n    return new FakeAudioContext();\n  }\n\n  createMediaStreamSource() {\n    return new FakeMediaStreamAudioSourceNode();\n  }\n\n  createAnalyser() {\n    return new FakeAnalyser();\n  }\n\n  close(): void {}\n}\n\nexport class FakeAudioMediaStream {\n  constructor() {}\n  getTracks(): Array<{}> {\n    return [];\n  }\n}\n\nclass FakeMediaStreamAudioSourceNode {\n  constructor() {}\n  connect(node: {}): void {}\n}\n\nclass FakeAnalyser {\n  fftSize: number;\n  smoothingTimeConstant: number;\n  private x: number;\n  constructor() {\n    this.x = 0;\n  }\n\n  getFloatFrequencyData(data: Float32Array): void {\n    const xs: number[] = [];\n    for (let i = 0; i < this.fftSize / 2; ++i) {\n      xs.push(this.x++);\n    }\n    data.set(new Float32Array(xs));\n  }\n\n  getFloatTimeDomainData(data: Float32Array): void {\n    const xs: number[] = [];\n    for (let i = 0; i < this.fftSize / 2; ++i) {\n      xs.push(-(this.x++));\n    }\n    data.set(new Float32Array(xs));\n  }\n\n  disconnect(): void {}\n}\n"]}