mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-14 15:56:38 +03:00
Joey Parrish
fbbd63d96b
This change fixes tests on Chromecast by loading tests later in the process. Test scripts are now dynamically inserted by boot.js, rather than loaded by Karma. The bootstrapping code then awaits the completion of that before starting the Karma frameworks (Jasmine) to run the tests. This also removes the use of goog.provide/goog.require in tests and test utils. We don't need to load test utils or library sources dynamically in each test, and this gives us more explicit control over script loading and ordering. Closes #4094
576 lines
19 KiB
JavaScript
576 lines
19 KiB
JavaScript
/*! @license
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* Shaka Player
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* Copyright 2016 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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describe('CeaDecoder', () => {
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const CeaUtils = shaka.test.CeaUtils;
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/** @type {string} */
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const DEFAULT_BG_COLOR = shaka.cea.CeaUtils.DEFAULT_BG_COLOR;
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/**
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* Initialization bytes for CC packet.
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* Includes padding bytes, USA country code, and ATSC provider code.
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* @type {!Uint8Array}
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*/
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const atscCaptionInitBytes = new Uint8Array([
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0xb5, // USA country code.
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0x00, 0x31, // ATSC provider code.
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0x47, 0x41, 0x39, 0x34, // ATSC user identifier.
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0x03, // User data type for cc_data.
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]);
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/** @type {!shaka.cea.CeaDecoder} */
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const decoder = new shaka.cea.CeaDecoder();
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describe('decodes CEA-608', () => {
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const edmCodeByte2 = 0x2c; // Erase displayed memory byte 2.
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// Blank padding control code between two control codes that are the same.
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const blankPaddingControlCode = new Uint8Array([0x97, 0x23]);
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// Erases displayed memory on every captioning mode.
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const eraseDisplayedMemory = new Uint8Array([
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...atscCaptionInitBytes, 0xc4, /* padding= */ 0xff,
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0xfc, 0x94, edmCodeByte2, // EDM on CC1
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0xfc, 0x1c, edmCodeByte2, // EDM on CC2
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0xfd, 0x15, edmCodeByte2, // EDM on CC3
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0xfd, 0x9d, edmCodeByte2, // EDM on CC4
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]);
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beforeEach(() => {
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decoder.clear();
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});
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it('green and underlined popon caption data on CC3', () => {
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const controlCount = 0x08;
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const captionData = 0xc0 | controlCount;
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const greenTextCC3Packet = new Uint8Array([
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...atscCaptionInitBytes, captionData, /* padding= */ 0xff,
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0xfd, 0x15, 0x20, // Pop-on mode (RCL control code)
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0xfd, 0x13, 0xe3, // PAC to underline and color text green on last row.
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0xfd, 0x67, 0xf2, // g, r
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0xfd, 0xe5, 0xe5, // e, e
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0xfd, 0x6e, 0x20, // n, space
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0xfd, 0xf4, 0xe5, // t, e
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0xfd, 0xf8, 0xf4, // x, t
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0xfd, 0x15, 0x2f, // EOC
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]);
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const startTimeCaption1 = 1;
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const startTimeCaption2 = 2;
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const expectedText = 'green text';
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const topLevelCue = new shaka.text.Cue(
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startTimeCaption1, startTimeCaption2, '');
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topLevelCue.nestedCues = [
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CeaUtils.createStyledCue(
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startTimeCaption1, startTimeCaption2, expectedText,
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/* underline= */ true, /* italics= */ false,
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/* textColor= */ 'green', /* backgroundColor= */ 'black'),
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];
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const expectedCaptions = [
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{
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stream: 'CC3',
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cue: topLevelCue,
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},
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];
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decoder.extract(greenTextCC3Packet, startTimeCaption1);
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decoder.extract(eraseDisplayedMemory, startTimeCaption2);
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const captions = decoder.decode();
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expect(captions).toEqual(expectedCaptions);
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});
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it('popon captions that change color and underline midrow on CC2', () => {
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const controlCount = 0x08;
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const captionData = 0xc0 | controlCount;
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const midrowStyleChangeCC2Packet = new Uint8Array([
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...atscCaptionInitBytes, captionData, /* padding= */ 0xff,
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0xfc, 0x1c, 0x20, // Pop-on mode (RCL control code).
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0xfc, 0xad, 0xad, // -, -
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0xfc, 0x19, 0x29, // Red + underline midrow style control code.
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0xfc, 0xf2, 0xe5, // r, e
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0xfc, 0x64, 0x80, // d, invalid
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0xfc, 0x19, 0x20, // Midrow style control code to clear styles.
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0xfc, 0xad, 0xad, // -, -
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0xfc, 0x1c, 0x2f, // EOC
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]);
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const startTimeCaption1 = 1;
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const startTimeCaption2 = 2;
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const expectedText1 = '-- ';
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const expectedText2 = 'red';
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const expectedText3 = ' --';
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// Since there are three style changes, there should be three nested cues.
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const topLevelCue = new shaka.text.Cue(
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startTimeCaption1, startTimeCaption2, '');
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topLevelCue.nestedCues = [
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CeaUtils.createDefaultCue(
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startTimeCaption1, startTimeCaption2, expectedText1),
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CeaUtils.createStyledCue(
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startTimeCaption1, startTimeCaption2, expectedText2,
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/* underline= */ true, /* italics= */ false,
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/* textColor= */ 'red', /* backgroundColor= */ DEFAULT_BG_COLOR),
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CeaUtils.createDefaultCue(
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startTimeCaption1, startTimeCaption2, expectedText3),
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];
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const expectedCaptions = [
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{
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stream: 'CC2',
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cue: topLevelCue,
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},
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];
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decoder.extract(midrowStyleChangeCC2Packet, startTimeCaption1);
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decoder.extract(eraseDisplayedMemory, startTimeCaption2);
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const captions = decoder.decode();
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expect(captions).toEqual(expectedCaptions);
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});
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it('italicized popon captions on a yellow background on CC2', () => {
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const controlCount = 0x08;
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const captionData = 0xc0 | controlCount;
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const midrowStyleChangeCC2Packet = new Uint8Array([
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...atscCaptionInitBytes, captionData, /* padding= */ 0xff,
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0xfc, 0x1c, 0x20, // Pop-on mode (RCL control code).
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0xfc, 0x19, 0x6e, // White Italics PAC.
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0xfc, 0x98, 0x2a, // Background attribute yellow.
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0xfc, 0xf4, 0xe5, // t, e
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0xfc, 0x73, 0xf4, // s, t
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0xfc, 0x19, 0x20, // Midrow style control code to clear styles.
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0xfc, 0x98, 0x20, // Background attribute to clear background.
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0xfc, 0x1c, 0x2f, // EOC
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]);
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const startTimeCaption1 = 1;
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const startTimeCaption2 = 2;
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const expectedText = 'test';
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// A single nested cue containing yellow, italicized text.
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const topLevelCue = new shaka.text.Cue(startTimeCaption1,
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startTimeCaption2, '');
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topLevelCue.nestedCues = [
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CeaUtils.createStyledCue(
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startTimeCaption1, startTimeCaption2, expectedText,
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/* underline= */ false, /* italics= */ true,
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/* textColor= */ 'white', /* backgroundColor= */ 'yellow'),
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];
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const expectedCaptions = [{
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stream: 'CC2',
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cue: topLevelCue,
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}];
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decoder.extract(midrowStyleChangeCC2Packet, startTimeCaption1);
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decoder.extract(eraseDisplayedMemory, startTimeCaption2);
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const captions = decoder.decode();
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expect(captions).toEqual(expectedCaptions);
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});
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it('popon captions with special characters on CC2', () => {
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const controlCount = 0x07;
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const captionData = 0xc0 | controlCount;
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const midrowStyleChangeCC2Packet = new Uint8Array([
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...atscCaptionInitBytes, captionData, /* padding= */ 0xff,
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0xfc, 0x1c, 0x20, // Pop-on mode (RCL control code).
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0xfc, 0x19, 0x37, // Special North American character (♪)
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0xfc, 0x20, 0x80, // SP, invalid. SP will be replaced by extended char.
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0xfc, 0x1a, 0x25, // Extended Spanish/Misc character (ü)
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0xfc, 0x20, 0x80, // SP, invalid.
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0xfc, 0x9b, 0xb9, // Extended German/Danish character (å)
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0xfc, 0x1c, 0x2f, // EOC
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]);
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const startTimeCaption1 = 1;
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const startTimeCaption2 = 2;
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const expectedText = '♪üå';
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const topLevelCue = new shaka.text.Cue(startTimeCaption1,
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startTimeCaption2, '');
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topLevelCue.nestedCues = [
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CeaUtils.createDefaultCue(
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startTimeCaption1, startTimeCaption2, expectedText),
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];
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const expectedCaptions = [{
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stream: 'CC2',
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cue: topLevelCue,
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}];
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decoder.extract(midrowStyleChangeCC2Packet, startTimeCaption1);
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decoder.extract(eraseDisplayedMemory, startTimeCaption2);
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const captions = decoder.decode();
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expect(captions).toEqual(expectedCaptions);
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});
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it('painton captions on CC1', () => {
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const controlCount = 0x03;
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const captionData = 0xc0 | controlCount;
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const paintonCaptionCC1Packet = new Uint8Array([
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...atscCaptionInitBytes, captionData, /* padding= */ 0xff,
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0xfc, 0x94, 0x29, // Paint-on mode (RDC control code).
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0xfc, 0xf4, 0xe5, // t, e
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0xfc, 0x73, 0xf4, // s, t
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]);
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const startTimeCaption1 = 1;
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const startTimeCaption2 = 2;
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const expectedText = 'test';
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const topLevelCue = new shaka.text.Cue(startTimeCaption1,
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startTimeCaption2, '');
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topLevelCue.nestedCues = [
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CeaUtils.createDefaultCue(
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startTimeCaption1, startTimeCaption2, expectedText),
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];
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const expectedCaptions = [{
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stream: 'CC1',
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cue: topLevelCue,
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}];
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decoder.extract(paintonCaptionCC1Packet, startTimeCaption1);
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decoder.extract(eraseDisplayedMemory, startTimeCaption2);
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const captions = decoder.decode();
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expect(captions).toEqual(expectedCaptions);
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});
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it('rollup captions (2 lines) on CC1', () => {
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const controlCount1 = 0x03;
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const controlCount2 = 0x02;
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const stream = 'CC1';
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const time1 = 1;
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const time2 = 2;
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const time3 = 3;
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const time4 = 4;
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const time5 = 5;
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// Carriage return on CC1
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const carriageReturnControlCode = new Uint8Array([0x94, 0xad]);
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const packets = [
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new Uint8Array([
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...atscCaptionInitBytes, 0xc0 | controlCount1, /* padding= */ 0xff,
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0xfc, 0x94, 0x25, // Roll-up 2 rows control code.
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0xfc, ...carriageReturnControlCode,
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0xfc, ...blankPaddingControlCode,
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]),
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new Uint8Array([
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...atscCaptionInitBytes, 0xc0 | controlCount1, /* padding= */ 0xff,
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0xfc, 0x31, 0xae, // 1, .
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0xfc, ...carriageReturnControlCode,
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0xfc, ...blankPaddingControlCode,
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]),
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new Uint8Array([
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...atscCaptionInitBytes, 0xc0 | controlCount1, /* padding= */ 0xff,
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0xfc, 0x32, 0xae, // 2, .
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0xfc, ...carriageReturnControlCode,
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0xfc, ...blankPaddingControlCode,
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]),
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new Uint8Array([
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...atscCaptionInitBytes, 0xc0 | controlCount1, /* padding= */ 0xff,
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0xfc, 0xb3, 0xae, // 3, .
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0xfc, ...carriageReturnControlCode,
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0xfc, ...blankPaddingControlCode,
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]),
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new Uint8Array([
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...atscCaptionInitBytes, 0xc0 | controlCount2, /* padding= */ 0xff,
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0xfc, 0x34, 0xae, // 4, .
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0xfc, 0x94, 0x2f, // EOC
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]),
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];
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for (let i = 0; i < packets.length; i++) {
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decoder.extract(packets[i], i+1);
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}
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decoder.extract(eraseDisplayedMemory, 6);
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// Top level cue corresponding to the first closed caption.
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const topLevelCue1 = new shaka.text.Cue(
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/* startTime= */ time1, /* endTime= */ time2, '');
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topLevelCue1.nestedCues = [
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CeaUtils.createDefaultCue(
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/* startTime= */ time1, /* endTime= */ time2, /* payload= */ '1.'),
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];
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// Top level cue corresponding to the second closed caption.
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const topLevelCue2 = new shaka.text.Cue(
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/* startTime= */ time2, /* endTime= */ time3, '');
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topLevelCue2.nestedCues = [
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CeaUtils.createDefaultCue(
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/* startTime= */ time2, /* endTime= */ time3, /* payload= */ '1.'),
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CeaUtils.createLineBreakCue(
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/* startTime= */ time2, /* endTime= */ time3),
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CeaUtils.createDefaultCue(
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/* startTime= */ time2, /* endTime= */ time3, /* payload= */ '2.'),
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];
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// Top level cue corresponding to the third closed caption.
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const topLevelCue3 = new shaka.text.Cue(
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/* startTime= */ time3, /* endTime= */ time4, '');
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topLevelCue3.nestedCues = [
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CeaUtils.createDefaultCue(
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/* startTime= */ time3, /* endTime= */ time4, /* payload= */ '2.'),
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CeaUtils.createLineBreakCue(
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/* startTime= */ time3, /* endTime= */ time4),
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CeaUtils.createDefaultCue(
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/* startTime= */ time3, /* endTime= */ time4, /* payload= */ '3.'),
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];
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// Top level cue corresponding to the fourth closed caption.
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const topLevelCue4 = new shaka.text.Cue(
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/* startTime= */ time4, /* endTime= */ time5, '');
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topLevelCue4.nestedCues = [
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CeaUtils.createDefaultCue(
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/* startTime= */ time4, /* endTime= */ time5, /* payload= */ '3.'),
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CeaUtils.createLineBreakCue(
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/* startTime= */ time4, /* endTime= */ time5),
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CeaUtils.createDefaultCue(
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/* startTime= */ time4, /* endTime= */ time5, /* payload= */ '4.'),
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];
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const expectedCaptions = [
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{
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stream,
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cue: topLevelCue1,
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},
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{
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stream,
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cue: topLevelCue2,
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},
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{
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stream,
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cue: topLevelCue3,
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},
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{
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stream,
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cue: topLevelCue4,
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},
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];
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const captions = decoder.decode();
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expect(captions).toEqual(expectedCaptions);
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});
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it('PAC shifts entire 2-line rollup window to a new row on CC1', () => {
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const controlCount1 = 0x03;
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const controlCount2 = 0x02;
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const stream = 'CC1';
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// Carriage return on CC1
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const carriageReturnControlCode = new Uint8Array([0x94, 0xad]);
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const packets = [
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new Uint8Array([
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...atscCaptionInitBytes, 0xc0 | controlCount1, /* padding= */ 0xff,
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0xfc, 0x94, 0x25, // Roll-up 2 rows control code.
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0xfc, ...carriageReturnControlCode,
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0xfc, 0x97, 0x23, // Blank padding control code
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]),
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new Uint8Array([
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...atscCaptionInitBytes, 0xc0 | controlCount1, /* padding= */ 0xff,
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0xfc, 0x31, 0xae, // 1, .
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0xfc, ...carriageReturnControlCode,
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0xfc, 0x97, 0x23, // Blank padding control code
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]),
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new Uint8Array([
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...atscCaptionInitBytes, 0xc0 | controlCount2, /* padding= */ 0xff,
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0xfc, 0x32, 0xae, // 2, .
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0xfc, 0x92, 0xe0, // PAC control code to move to row 4.
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]),
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];
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for (let i = 0; i < packets.length; i++) {
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decoder.extract(packets[i], i+1);
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}
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decoder.extract(eraseDisplayedMemory, 3);
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// Top level cue corresponding to the first closed caption.
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const topLevelCue1 = new shaka.text.Cue(/* startTime= */ 1,
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/* endTime= */ 2, '');
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topLevelCue1.nestedCues = [
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CeaUtils.createDefaultCue(
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/* startTime= */ 1, /* endTime= */ 2, /* payload= */ '1.'),
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];
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// Top level cue corresponding to the second closed caption.
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const topLevelCue2 = new shaka.text.Cue(/* startTime= */ 2,
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/* endTime= */ 3, '');
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topLevelCue2.nestedCues = [
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CeaUtils.createDefaultCue(
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/* startTime= */ 2, /* endTime= */ 3, /* payload= */ '1.'),
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CeaUtils.createLineBreakCue(/* startTime= */ 2, /* endTime= */ 3),
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CeaUtils.createDefaultCue(
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/* startTime= */ 2, /* endTime= */ 3, /* payload= */ '2.'),
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];
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const expectedCaptions = [
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{
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stream,
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cue: topLevelCue1,
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},
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{
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stream,
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cue: topLevelCue2,
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},
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];
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const captions = decoder.decode();
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expect(captions).toEqual(expectedCaptions);
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});
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it('does not emit text sent while in CEA-608 Text Mode', () => {
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const controlCount = 0x03;
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const captionData = 0xc0 | controlCount;
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const textModePacket = new Uint8Array([
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...atscCaptionInitBytes, captionData, /* padding= */ 0xff,
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0xfc, 0x94, 0x2a, // Text mode (Text restart control code).
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0xfc, 0xf4, 0xe5, // t, e
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0xfc, 0x73, 0xf4, // s, t
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]);
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const startTimeCaption1 = 1;
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const startTimeCaption2 = 2;
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decoder.extract(textModePacket, startTimeCaption1);
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decoder.extract(eraseDisplayedMemory, startTimeCaption2);
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const captions = decoder.decode();
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expect(captions).toEqual([]);
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});
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it('resets the decoder on >=45 consecutive bad frames', () => {
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// CEA-608-B C.21 says to reset the decoder after 45 invalid frames.
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const controlCount = 0x0f;
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const captionData = 0xc0 | controlCount;
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const badFrames = [];
|
|
const badFrameCount = 15;
|
|
for (let i = 0; i<badFrameCount; i++) {
|
|
// Without loss of generality, the bad frames will be sent on CC1.
|
|
badFrames.push(0xfc, 0x0, 0x0);
|
|
}
|
|
|
|
const badFramesBuffer = new Uint8Array([
|
|
...atscCaptionInitBytes, captionData, /* padding= */ 0xff,
|
|
...new Uint8Array(badFrames),
|
|
]);
|
|
|
|
// 3*15 = 45 total bad frames extracted.
|
|
for (let i = 0; i < 3; i++) {
|
|
decoder.extract(badFramesBuffer, i+1);
|
|
}
|
|
|
|
spyOn(decoder, 'reset').and.callThrough();
|
|
decoder.decode();
|
|
|
|
expect(decoder.reset).toHaveBeenCalledTimes(1);
|
|
});
|
|
});
|
|
|
|
describe('decodes CEA-708', () => {
|
|
// Hide window (2 bytes), with a bitmap provided to indicate all windows.
|
|
const hideWindow = new Uint8Array([
|
|
...atscCaptionInitBytes, 0xc2, /* padding= */ 0xff,
|
|
0xff, 0x02, 0x22, // Service #1, and 2 bytes will follow.
|
|
0xfe, 0x8a, 0xff,
|
|
]);
|
|
|
|
it('well-formed caption packet that contains valid control codes', () => {
|
|
const startTime = 1;
|
|
const endTime = 2;
|
|
const bytePairCount = 0x07;
|
|
const captionData = 0xc0 | bytePairCount;
|
|
const serviceNumber = 1;
|
|
const cea708Packet = new Uint8Array([
|
|
...atscCaptionInitBytes, captionData, /* padding= */ 0xff,
|
|
// Byte 1 (0x07) is a DTVCC_PACKET_START that states 7 * 2 - 1 bytes
|
|
// will follow. Byte 2 is a service block header that selects service #
|
|
// and states that there are 12 bytes that will follow in the block.
|
|
0xff, 0x07, (serviceNumber << 5) | 12,
|
|
|
|
// Define window (7 bytes). Visible window #0 with 10 rows, 10 columns.
|
|
0xfe, 0x98, 0x38,
|
|
0xfe, 0x00, 0x00,
|
|
0xfe, 0x0a, 0x0a,
|
|
0xfe, 0x00,
|
|
|
|
// Series of G0 control codes that add text
|
|
0x74, // t
|
|
0xfe, 0x65, 0x73, // e, s
|
|
0xfe, 0x74, 0x00, // t, padding
|
|
]);
|
|
|
|
decoder.extract(cea708Packet, startTime);
|
|
decoder.extract(hideWindow, endTime);
|
|
|
|
const text = 'test';
|
|
const topLevelCue = new shaka.text.Cue(startTime, endTime, '');
|
|
topLevelCue.nestedCues = [
|
|
CeaUtils.createDefaultCue(startTime, endTime, /* payload= */ text),
|
|
];
|
|
|
|
const expectedCaptions = [
|
|
{
|
|
stream: 'svc1',
|
|
cue: topLevelCue,
|
|
},
|
|
];
|
|
|
|
const captions = decoder.decode();
|
|
expect(captions).toEqual(expectedCaptions);
|
|
});
|
|
|
|
it('service block contains a corrupted header', () => {
|
|
const startTime = 1;
|
|
const endTime = 2;
|
|
const bytePairCount = 0x02;
|
|
const captionData = 0xc0 | bytePairCount;
|
|
const serviceNumber = 1;
|
|
const cea708Packet = new Uint8Array([
|
|
...atscCaptionInitBytes, captionData, /* padding= */ 0xff,
|
|
// Byte 1 (0x01) is DTVCC_PACKET_START that states 1 * 2 - 1 bytes
|
|
// will follow. Byte 2 is a service block header that selects service #
|
|
// and states that there are 12 bytes that will follow in the block.
|
|
0xff, 0x01, (serviceNumber << 5) | 12,
|
|
0xfe, 0x00, 0x00,
|
|
]);
|
|
|
|
// The data corrupted, since the service block header claimed 12 bytes
|
|
// would follow, but only two bytes followed.
|
|
decoder.extract(cea708Packet, startTime);
|
|
decoder.extract(hideWindow, endTime);
|
|
|
|
// Then we should have warned of the invalid data and stopped processing
|
|
// the block without interrupting playback.
|
|
spyOn(shaka.log, 'warnOnce').and.callThrough();
|
|
|
|
const captions = decoder.decode();
|
|
expect(shaka.log.warnOnce).toHaveBeenCalledWith('CEA708_INVALID_DATA',
|
|
'Buffer read out of bounds / invalid CEA-708 Data.');
|
|
expect(shaka.log.warnOnce).toHaveBeenCalledTimes(1);
|
|
expect(captions).toEqual([]);
|
|
});
|
|
});
|
|
});
|