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pssh_unit.js
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/**
* @license
* Copyright 2016 Google Inc.
*
* 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.
*/
describe('Pssh', () => {
const fromHex = shaka.util.Uint8ArrayUtils.fromHex;
const toHex = shaka.util.Uint8ArrayUtils.toHex;
const WIDEVINE_SYSTEM_ID = 'edef8ba979d64acea3c827dcd51d21ed';
const PLAYREADY_SYSTEM_ID = '9a04f07998404286ab92e65be0885f95';
const GENERIC_SYSTEM_ID = '1077efecc0b24d02ace33c1e52e2fb4b';
const WIDEVINE_PSSH =
'00000028' + // atom size
'70737368' + // atom type='pssh'
'00000000' + // v0, flags=0
'edef8ba979d64acea3c827dcd51d21ed' + // system id (Widevine)
'00000008' + // data size
'0102030405060708'; // data
const PLAYREADY_PSSH =
'00000028' + // atom size
'70737368' + // atom type 'pssh'
'00000000' + // v0, flags=0
'9a04f07998404286ab92e65be0885f95' + // system id (PlayReady)
'00000008' + // data size
'0102030405060708'; // data
const GENERIC_PSSH =
'00000044' + // atom size
'70737368' + // atom type 'pssh'
'01000000' + // v1, flags=0
'1077efecc0b24d02ace33c1e52e2fb4b' + // system id (generic CENC)
'00000002' + // key ID count
'30313233343536373839303132333435' + // key ID='0123456789012345'
'38393031323334354142434445464748' + // key ID='ABCDEFGHIJKLMNOP'
'00000000'; // data size=0
const ZERO_SIZED_GENERIC_PSSH =
'00000000' + // atom size (whole buffer)
'70737368' + // atom type='pssh'
'01000000' + // v1, flags=0
'1077efecc0b24d02ace33c1e52e2fb4b' + // system id (generic CENC)
'00000002' + // key ID count
'30313233343536373839303132333435' + // key ID='0123456789012345'
'38393031323334354142434445464748' + // key ID='ABCDEFGHIJKLMNOP'
'00000000'; // data size=0
const OTHER_BOX =
'00000018' + // atom size
'77686174' + // atom type 'what'
'deadbeefdeadbeefdeadbeefdeadbeef'; // garbage box data
const TRUNCATED_WIDEVINE_PSSH =
WIDEVINE_PSSH.substr(0, WIDEVINE_PSSH.length - 6);
const TRUNCATED_PLAYREADY_PSSH =
PLAYREADY_PSSH.substr(0, PLAYREADY_PSSH.length - 6);
const TRUNCATED_GENERIC_PSSH =
GENERIC_PSSH.substr(0, GENERIC_PSSH.length - 6);
it('parses a Widevine PSSH', () => {
const pssh = new shaka.util.Pssh(fromHex(WIDEVINE_PSSH));
expect(pssh.systemIds.length).toBe(1);
expect(pssh.systemIds[0]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(0);
});
it('parses a PlayReady PSSH', () => {
const pssh = new shaka.util.Pssh(fromHex(PLAYREADY_PSSH));
expect(pssh.systemIds.length).toBe(1);
expect(pssh.systemIds[0]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(0);
});
it('parses a generic CENC PSSH', () => {
const pssh = new shaka.util.Pssh(fromHex(GENERIC_PSSH));
expect(pssh.systemIds.length).toBe(1);
expect(pssh.systemIds[0]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
});
it('throws on a truncated PSSH', () => {
const psshs = [
fromHex(TRUNCATED_WIDEVINE_PSSH),
fromHex(TRUNCATED_PLAYREADY_PSSH),
fromHex(TRUNCATED_GENERIC_PSSH),
fromHex(WIDEVINE_PSSH + TRUNCATED_PLAYREADY_PSSH),
fromHex(WIDEVINE_PSSH + TRUNCATED_GENERIC_PSSH),
fromHex(PLAYREADY_PSSH + TRUNCATED_WIDEVINE_PSSH),
fromHex(PLAYREADY_PSSH + TRUNCATED_GENERIC_PSSH),
fromHex(GENERIC_PSSH + TRUNCATED_WIDEVINE_PSSH),
fromHex(GENERIC_PSSH + TRUNCATED_PLAYREADY_PSSH),
];
for (const pssh of psshs) {
const expected = shaka.test.Util.jasmineError(new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.MEDIA,
shaka.util.Error.Code.BUFFER_READ_OUT_OF_BOUNDS));
expect(() => new shaka.util.Pssh(pssh)).toThrow(expected);
}
});
it('parses concatenated PSSHs in any order', () => {
let pssh = new shaka.util.Pssh(fromHex(
WIDEVINE_PSSH + PLAYREADY_PSSH));
expect(pssh.systemIds.length).toBe(2);
expect(pssh.systemIds[0]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(0);
pssh = new shaka.util.Pssh(fromHex(
PLAYREADY_PSSH + WIDEVINE_PSSH));
expect(pssh.systemIds[0]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(0);
pssh = new shaka.util.Pssh(fromHex(
WIDEVINE_PSSH + GENERIC_PSSH));
expect(pssh.systemIds[0]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
pssh = new shaka.util.Pssh(fromHex(
GENERIC_PSSH + WIDEVINE_PSSH));
expect(pssh.systemIds[0]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
pssh = new shaka.util.Pssh(fromHex(
WIDEVINE_PSSH + PLAYREADY_PSSH + GENERIC_PSSH));
expect(pssh.systemIds[0]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.systemIds[2]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
pssh = new shaka.util.Pssh(fromHex(
PLAYREADY_PSSH + WIDEVINE_PSSH + GENERIC_PSSH));
expect(pssh.systemIds[0]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.systemIds[2]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
pssh = new shaka.util.Pssh(fromHex(
WIDEVINE_PSSH + GENERIC_PSSH + PLAYREADY_PSSH));
expect(pssh.systemIds[0]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.systemIds[2]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
pssh = new shaka.util.Pssh(fromHex(
PLAYREADY_PSSH + GENERIC_PSSH + WIDEVINE_PSSH));
expect(pssh.systemIds[0]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.systemIds[2]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
pssh = new shaka.util.Pssh(fromHex(
GENERIC_PSSH + WIDEVINE_PSSH + PLAYREADY_PSSH));
expect(pssh.systemIds[0]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.systemIds[2]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
pssh = new shaka.util.Pssh(fromHex(
GENERIC_PSSH + PLAYREADY_PSSH + WIDEVINE_PSSH));
expect(pssh.systemIds[0]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.systemIds[2]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
});
it('ignores non-PSSH boxes and continues parsing', () => {
let pssh = new shaka.util.Pssh(fromHex(
OTHER_BOX + WIDEVINE_PSSH));
expect(pssh.systemIds.length).toBe(1);
expect(pssh.systemIds[0]).toBe(WIDEVINE_SYSTEM_ID);
pssh = new shaka.util.Pssh(fromHex(
WIDEVINE_PSSH + OTHER_BOX));
expect(pssh.systemIds.length).toBe(1);
expect(pssh.systemIds[0]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(0);
pssh = new shaka.util.Pssh(fromHex(
PLAYREADY_PSSH + OTHER_BOX + WIDEVINE_PSSH));
expect(pssh.systemIds.length).toBe(2);
expect(pssh.systemIds[0]).toBe(PLAYREADY_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(0);
});
it('parses a zero-sized PSSH box', () => {
let pssh = new shaka.util.Pssh(fromHex(ZERO_SIZED_GENERIC_PSSH));
expect(pssh.systemIds.length).toBe(1);
expect(pssh.systemIds[0]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
pssh = new shaka.util.Pssh(fromHex(
WIDEVINE_PSSH + ZERO_SIZED_GENERIC_PSSH));
expect(pssh.systemIds.length).toBe(2);
expect(pssh.systemIds[0]).toBe(WIDEVINE_SYSTEM_ID);
expect(pssh.systemIds[1]).toBe(GENERIC_SYSTEM_ID);
expect(pssh.cencKeyIds.length).toBe(2);
});
it('extracts boundaries for concatenated boxes', () => {
const psshData = fromHex(
GENERIC_PSSH +
WIDEVINE_PSSH +
OTHER_BOX +
PLAYREADY_PSSH);
const pssh = new shaka.util.Pssh(psshData);
expect(pssh.dataBoundaries.length).toBe(3);
const data1 = psshData.subarray(
pssh.dataBoundaries[0].start,
pssh.dataBoundaries[0].end + 1);
const data2 = psshData.subarray(
pssh.dataBoundaries[1].start,
pssh.dataBoundaries[1].end + 1);
const data3 = psshData.subarray(
pssh.dataBoundaries[2].start,
pssh.dataBoundaries[2].end + 1);
expect(toHex(data1)).toBe(GENERIC_PSSH);
expect(toHex(data2)).toBe(WIDEVINE_PSSH);
expect(toHex(data3)).toBe(PLAYREADY_PSSH);
});
});