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checkST2110.js
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/* Copyright 2018 Streampunk Media Ltd.
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.
*/
const splitLines = sdp => sdp.match(/[^\r\n]+/g);
const concat = arrays => Array.prototype.concat.apply([], arrays);
const mediaclkPattern = /[\r\n]a=mediaclk/;
const mediaclkTypePattern = /[\r\n]a=mediaclk[^\s=]+/g;
const mediaclkDirectPattern = /[\r\n]a=mediaclk:direct=\d+\s+/g;
const tsrefclkPattern = /[\r\n]a=ts-refclk/;
const ptpPattern = /traceable|((([0-9A-F]{2}-){7}[0-9A-F]{2})(:(\d+))?)$/;
const macPattern = /(([0-9a-fA-F]{2}-){5}[0-9a-fA-F]{2})/;
const dupPattern = /[\r\n]m=[\s\S]+a=ssrc-group:DUP|[\r\n]a=group:DUP[\s\S]+m=/;
const ssrcGroupPattern = /a=ssrc-group:DUP\s+(\d+)\s+(\d+)/;
const groupPattern = /a=group:DUP\s+(\S+)\s+(\S+)/;
const ssrcPattern = /a=ssrc:(\d+)\s/;
const videoPattern = /video\s+(\d+)(\/\d+)?\s+(RTP\/S?AVP)\s+(\d+)/;
const rtpmapPattern = /a=rtpmap:(\d+)\s(\S+)\/(\d+)\s*/;
const bandwidthPattern = /b=([a-zA-Z]+):(\d+$)/;
const fmtpElement = '([^\\s=;]+)(?:=([^\\s;]+))?';
const fmtpSeparator = '(?:;\\s*)';
const fmtpPattern = new RegExp('a=fmtp:(\\d+)\\s*(\\s' + fmtpElement + '(' + fmtpSeparator + fmtpElement + ')*' + fmtpSeparator + '?)?$');
const fmtpParams = new RegExp(fmtpElement + fmtpSeparator + '?', 'g');
const integerPattern = /^[1-9]\d*$/;
const frameRatePattern = /^([1-9]\d*)(?:\/([1-9]\d*))?$/;
const frameRateAttributePattern = /a=framerate:([1-9]\d*|(0|[1-9]\d*)\.\d*[1-9])$/;
const parPattern = /^([1-9]\d*):([1-9]\d*)$/;
// TODO: Move AM824 into a separate set of tests specific to ST.2110-31
const rtpmapSound = /a=rtpmap:(\d+)\s+(L16|L24|AM824)\/([1-9]\d*)\/([1-9]\d*)/;
const ptimePattern = /^a=ptime:(\d+(?:\.\d+)?)$/;
const maxptimePattern = /^a=maxptime:(\d+(?:\.\d+)?)$/;
const audioPattern = /audio\s+(\d+)(\/\d+)?\s+(RTP\/S?AVP)\s+(\d+)/;
const mediaPattern = /(audio|video)\s+(\d+)(\/\d+)?\s+(RTP\/S?AVP)\s+(\d+)/;
const channelOrderPattern = /^a=fmtp:(\d+)\s+.*channel-order=([^\s;]+).*$/;
const smpteChannelPattern =
/SMPTE2110\.\((M|DM|ST|LtRt|51|71|222|SGRP|U\d\d)(,(M|DM|ST|LtRt|51|71|222|SGRP|U\d\d))*\)/;
// Skip the following 'video' media types until we have more complete validation for them
const skipVideoTypes = ['vc2', 'SMPTE2022-6'];
const specExample20 = `v=0
o=- 123456 11 IN IP4 192.168.100.2
s=Example of a SMPTE ST2110-20 signal
i=this example is for 720p video at 59.94
t=0 0
a=recvonly
a=group:DUP primary secondary
m=video 50000 RTP/AVP 112
c=IN IP4 239.100.9.10/32
a=source-filter:incl IN IP4 239.100.9.10 192.168.100.2
a=rtpmap:112 raw/90000
a=fmtp:112 sampling=YCbCr-4:2:2; width=1280; height=720; exactframerate=60000/1001; depth=10; TCS=SDR; colorimetry=BT709; PM=2110GPM; SSN=ST2110-20:2017;
a=ts-refclk:ptp=IEEE1588-2008:39-A7-94-FF-FE-07-CB-D0:37
a=mediaclk:direct=0
a=mid:primary
m=video 50020 RTP/AVP 112
c=IN IP4 239.101.9.10/32
a=source-filter:incl IN IP4 239.101.9.10 192.168.101.2
a=rtpmap:112 raw/90000
a=fmtp:112 sampling=YCbCr-4:2:2; width=1280; height=720; exactframerate=60000/1001; depth=10; TCS=SDR; colorimetry=BT709; PM=2110GPM; SSN=ST2110-20:2017;
a=ts-refclk:ptp=IEEE1588-2008:39-A7-94-FF-FE-07-CB-D0:37
a=mediaclk:direct=0
a=mid:secondary
`;
// Example SDP data from VSF TR-08:2022 Appendix A
// See https://videoservicesforum.com/download/technical_recommendations/VSF_TR-08_2022-04-20.pdf
// NOTE: this example in this revision of TR-08 still has some syntax errors (b= lines are in wrong position, and the sampling and level values do not use the correct '-' character)
const specExample22 = `v=0
o=- 101202 53 IN IP4 10.0.81.54
s=237.0.0.50:22000
i=Nmos Testing 237.0.0.50:22000
t=0 0
a=recvonly
a=group:DUP PRIMARY SECONDARY
m=video 22000 RTP/AVP 98
c=IN IP4 237.0.0.50/32
a=source-filter: incl IN IP4 237.0.0.50 10.0.81.54
a=rtpmap:98 jxsv/90000
a=fmtp:98 sampling=YCbCr-4:2:2;width=1280;height=720;packetmode=0;exactframerate=60000/1001;depth=10;TCS=SDR;colorimetry=BT709;SSN=ST2110-22:2019;TP=2110TPN;level=1k-1;sublevel=Sublev3bpp
b=AS:116000
a=ssrc:0 cname:[email protected]
a=ts-refclk:ptp=IEEE1588-2008:08-00-11-FF-FE-22-91-3C:127
a=mediaclk:direct=0
a=mid:PRIMARY
m=video 22000 RTP/AVP 98
c=IN IP4 237.64.0.50/32
a=source-filter: incl IN IP4 237.64.0.50 10.0.81.154
a=rtpmap:98 jxsv/90000
a=fmtp:98 sampling=YCbCr-4:2:2;width=1280;height=720;packetmode=0;exactframerate=60000/1001;depth=10;TCS=SDR;colorimetry=BT709;SSN=ST2110-22:2019;TP=2110TPN;level=1k-1;sublevel=Sublev3bpp
b=AS:116000
a=ssrc:0 cname:[email protected]
a=ts-refclk:ptp=IEEE1588-2008:08-00-11-FF-FE-22-91-3C:127
a=mediaclk:direct=0
a=mid:SECONDARY
`;
// NOTE: all ST 2110 references are for the originally published specifications unless a later revision is indicated
// ST 2110-10 Section 7.4 Test 1 - Where mediaclk:direct is used with PTP, offset value is zero
// [Also ST 2110-10:2022 Section 8.3]
const test_10_74_1 = (sdp, params) => {
let errors = [];
let streams = sdp.split(/[\r\n]m=/).slice(1);
for (let s = 0; s < streams.length; s++) {
let zeroCheck = streams[s].match(mediaclkDirectPattern);
if (Array.isArray(zeroCheck) && zeroCheck.length > 0 &&
streams[s].indexOf('IEEE1588-2008') > 0) { // Zero check only PTP clocks
zeroCheck = zeroCheck.map(z => +(z.trim().split('=')[2]));
for (let x = 0; x < zeroCheck.length; x++) {
if (zeroCheck[x] !== 0) {
errors.push(new Error(`Stream ${s + 1}: The 'mediaclk' attribute shall have a zero offset when direct-referenced PTP timing is in use, as per ST 2110-10 Section 7.4 [also ST 2110-10:2022 Section 8.3].`));
}
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10 Section 7.4 [also ST 2110-10:2022 Section 8.3] Test 1 - Where mediaclk:direct is used with PTP, offset value is zero');
}
return errors;
};
// ST 2110-10 Section 8.1 Test 1 - Shall have media-level mediaclk per stream
// [Also ST 2110-10:2022 Section 8.3]
const test_10_81_1 = (sdp, params) => {
let errors = [];
let streams = sdp.split(/[\r\n]m=/).slice(1);
for (let s = 0; s < streams.length; s++) {
if (!mediaclkPattern.test(streams[s])) {
errors.push(new Error(`Stream ${s + 1}: Each stream description shall have a media-level 'mediaclk' attribute, as per ST 2110-10 Section 8.1 [also ST 2110-10:2022 Section 8.3].`));
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10 Section 8.1 [also ST 2110-10:2022 Section 8.3] Test 1 - Shall have media-level mediaclk per stream');
}
return errors;
};
// ST 2110-10 Section 8.1 Test 2 - Should have mediaclk using direct reference
// [Also ST 2110-10:2022 Section 8.3 - Shall have mediaclk using direct or sender reference]
const test_10_81_2 = (sdp, params) => {
if (!params.should) {
if (params.verbose) {
console.log('Test Skipped: ST 2110-10 Section 8.1 Test 2 - Use --should to check that mediaclk uses direct reference');
}
return [];
}
let directCheck = sdp.match(mediaclkTypePattern);
if (Array.isArray(directCheck) && directCheck.length > 0) {
directCheck = directCheck.filter(x => !x.slice(1).startsWith('a=mediaclk:direct'));
directCheck = directCheck.filter(x => !x.slice(1).startsWith('a=mediaclk:sender'));
// Log the Passed test if verbose outputs
if (params.verbose && directCheck.length == 0) {
console.log('Test Passed: ST 2110-10 Section 8.1 Test 2 - Should have mediaclk using direct reference');
}
return concat(directCheck.map(nd =>
new Error(`The 'direct' reference for the mediaclk parameter should be used, as per ST 2110-10 Section 8.1. Found '${nd.slice(1)}'.`)));
} else {
if (params.verbose) {
console.log('Test Passed: ST 2110-10 Section 8.1 Test 2 - Should have mediaclk using direct reference');
}
return [];
}
};
// ST 2110-10 Section 8.2 Test 1 - Shall have a media-level ts-refclk
const test_10_82_1 = (sdp, params) => {
let errors = [];
let streams = sdp.split(/[\r\n]m=/).slice(1);
for (let s = 0; s < streams.length; s++) {
if (!tsrefclkPattern.test(sdp)) {
errors.push(new Error(`Stream ${s + 1}: Stream descriptions shall have a media-level 'ts-refclk' attribute, as per ST 2110-10 Section 8.2.`));
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10 Section 8.2 Test 1 - Shall have a media-level ts-refclk');
}
return errors;
};
// ST 2110-10 Section 8.2 Test 2 - Shall be ptp reference or shall be localmac
const test_10_82_2 = (sdp, params) => {
let errors = [];
let lines = splitLines(sdp);
let mediaLevel = false;
for (let x = 0; x < lines.length; x++) {
if (!mediaLevel) {
if (lines[x].startsWith('m=')) {
mediaLevel = true;
}
continue;
}
if (lines[x].startsWith('a=ts-refclk')) {
if (!lines[x].startsWith('a=ts-refclk:ptp=') &&
!lines[x].startsWith('a=ts-refclk:localmac')) {
errors.push(
new Error(`Line ${x + 1}: Reference clocks shall use the PTP form or shall use the localmac form, as per ST 2110-10 Section 8.2.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10 Section 8.2 Test 2 - Reference clocks shall be ptp reference or shall be localmac');
}
return errors;
};
// ST 2110-10 Section 8.2 Test 3 - If a PTP reference clock, check parameters
const test_10_82_3 = (sdp, params) => {
let errors = [];
let lines = splitLines(sdp);
let mediaLevel = false;
for (let x = 0; x < lines.length; x++) {
if (!mediaLevel) {
if (lines[x].startsWith('m=')) {
mediaLevel = true;
}
continue;
}
if (lines[x].startsWith('a=ts-refclk:ptp=')) {
let ptpDetails = lines[x].slice(16);
if (ptpDetails.startsWith('traceable')) {
errors.push(new Error(`Line ${x + 1}: An example in the first published version of ST 2110 suggested 'traceable' was acceptable without preceeding it with 'IEEE1588-2008'. This is not a permitted form in RFC 7273 and has been corrected later versions of ST 2110-10.`));
continue; // no longer acceptable form
}
if (!ptpDetails.startsWith('IEEE1588-2008:')) {
errors.push(new Error(`Line ${x + 1}: The only supported PTP version is 'IEEE1588-2008', as per ST 2110-10 Section 8.2.`));
continue;
}
if (!ptpPattern.test(ptpDetails.slice(14))) {
errors.push(new Error(`Line ${x + 1}: RFC 7273 PTP reference clock attribute parameters for 'ptp-server' do not match acceptable patterns.`));
continue;
}
let ptpMatch = ptpDetails.slice(14).match(ptpPattern);
if (ptpMatch[5]) {
let domainNmbr = +ptpMatch[5];
if (domainNmbr < 0 || domainNmbr > 127) {
errors.push(new Error(`Line ${x + 1}: PTP domain number must be a value between 0 and 127 inclusive, as per RFC 7273 Section 4.8.`));
}
} else if (ptpMatch[2]) {
// RFC 7273 permits ptp-domain to be omitted, but ST 2110-10 does not
errors.push(new Error(`Line ${x + 1}: PTP domain number must be specified, as per ST 2110-10 Section 8.2.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10 Section 8.2 Test 3 - PTP ts-refclk parameters all good.');
}
return errors;
};
// ST 2110-10 Section 8.2 Test 4 - If local mac clock, check MAC address
const test_10_82_4 = (sdp, params) => {
let errors = [];
let lines = splitLines(sdp);
let mediaLevel = false;
for (let x = 0; x < lines.length; x++) {
if (!mediaLevel) {
if (lines[x].startsWith('m=')) {
mediaLevel = true;
}
continue;
}
if (lines[x].startsWith('a=ts-refclk:localmac=')) {
let mac = lines[x].slice(21);
if (!macPattern.test(mac)) {
errors.push(new Error(`Line ${x + 1}: PTP reference clock of type 'localmac' has an invalid MAC address, as per ST 2110-10 Section 8.2.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10 Section 8.2 Test 4 - If local mac clock, check MAC address.');
}
return errors;
};
// ST 2110-10 Section 8.3 Test 1 - Duplication expected, is it present?
const test_10_83_1 = (sdp, params) => {
if (!params.duplicate) {
if (params.verbose) {
console.log('Test Skipped: ST 2110-10 Section 8.3 Test 1 - Use --duplicate to check');
}
return [];
}
if (dupPattern.test(sdp)) {
if (params.verbose) {
console.log('Test Passed: ST 2110-10 Section 8.3 Test 1 - Duplicate streams verified');
}
return [];
} else {
return [new Error('Duplicate RTP streams are expected, but neither media-level \'ssrc-group:DUP\' or session-level \'group:DUP\' were found, to satisfy ST 2110-10 Section 8.3.')];
}
};
// ST 2110-10 Section 8.3 Test 2 - Separate source addresses - RFC 7104 section 4.1
const test_10_83_2 = (sdp, params) => {
if (!sdp.match(/a=ssrc-group/)) { // Detect whether this test applies
return [];
}
let lines = splitLines(sdp);
let errors = [];
let ssrcs = [[]];
let streamCounter = 0;
for (let x = 0; x < lines.length; x++) { // Order of ssrc and ssrc-group nor defined ...
if (lines[x].startsWith('m=')) {
streamCounter++;
ssrcs.push([]);
}
if (lines[x].startsWith('a=ssrc:')) {
let ssrcMatch = lines[x].match(ssrcPattern);
if (!ssrcMatch) {
errors.push(new Error(`Line ${x + 1}: Found an SSRC line with group reference to a non-integer value, which is noe possible according to RFC 7104.`));
continue;
}
ssrcs[streamCounter].push(+ssrcMatch[1]);
}
}
streamCounter = 0;
for (let x = 0; x < lines.length; x++) { // .. so iterate twice
if (lines[x].startsWith('m=')) {
streamCounter++;
}
if (!lines[x].startsWith('a=ssrc-group') || (streamCounter === 0)) {
continue;
}
let groupMatch = lines[x].match(ssrcGroupPattern);
if (!groupMatch) {
errors.push(new Error(`Line ${x + 1}: Separate source address grouping is not an acceptable pattern, with reference to RFC 7104.`));
continue;
}
for (let groupID of groupMatch.slice(1, 3)) {
if (ssrcs[streamCounter].indexOf(+groupID) < 0) {
errors.push(new Error(`Line ${x + 1}: Reference to non existent source-level attribute ${groupID} within stream ${streamCounter}.`));
}
}
}
// TODO check the source-filter lines have one Mcast address and 2 IP addresses
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10 Section 8.3 Test 2 - Separate source addresses - RFC 7104 section 4.1');
}
return errors;
};
// ST 2110-10 Section 8.3 Test 3 - Separate destination addresses - RFC 7104 Section 4.2
const test_10_83_3 = (sdp, params) => {
if (!sdp.match(/a=group/)) {
if (params.verbose) {
console.log('Test Skipped: ST 2110-10 Section 8.3 Test 3 - Separate destination addresses. No a=group present.');
}
return [];
}
let lines = splitLines(sdp);
let errors = [];
let mids = [];
let streamCounter = 0;
for (let x = 0; x < lines.length; x++) {
if (lines[x].startsWith('m=')) {
if (!mids[streamCounter++]) { mids.push(''); }
}
if (lines[x].startsWith('a=mid:')) {
let mid = lines[x].slice(6);
if (mids.indexOf(mid) >= 0) {
errors.push(new Error(`Line ${x + 1}: Duplicate media identification '${mid}' found which is not permitted by RFC 5888 Section 4.'`));
continue;
}
if (mids[streamCounter]) {
errors.push(new Error(`Line ${x + 1}: One stream with two media identifiers '${mid}' and '${mids[streamCounter]}'.`));
continue;
}
mids.push(mid);
}
}
let doneOne = false;
for (let x = 0; x < lines.length; x++) {
if (lines[x].startsWith('m=')) {
if (!doneOne) {
errors.push(new Error(`Got to line ${x + 1}, the end of session-level description, without finding the destination group, with reference to RFC 7104.`));
}
break;
}
if (!lines[x].startsWith('a=group')) {
continue;
}
let groupMatch = lines[x].match(groupPattern);
if (!groupMatch) {
errors.push(new Error(`Line ${x + 1}: Separate destination address grouping is not an acceptable pattern, with reference to RFC 7104.`));
continue;
}
doneOne = true;
for (let groupId of groupMatch.slice(1, 3)) {
if (mids.indexOf(groupId) < 0) {
errors.push(new Error(`Line ${x + 1}: Separate destination group reference '${groupId}' with no associated stream, with reference to RFC 7104.`));
}
}
}
// TODO check the source-filter lines have one Mcast address and 2 IP addresses
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10 Section 8.3 Test 3 - Separate destination addresses - RFC 7104 Section 4.2');
}
return errors;
};
// ST 2110-20 Section 7.1 Test 1 - If required, check all streams are video
const test_20_71_1 = (sdp, params) => {
let streams = sdp.split(/[\r\n]m=/);
let errors = [];
if (params.videoOnly) {
for (let s = 1; s < streams.length; s++) {
if (!streams[s].startsWith('video')) {
errors.push(new Error(`Stream ${s}: Media type is not 'video' and video only files are in test, as per ST 2110-20 Section 7.1.`));
}
}
}
if (params.verbose && !params.videoOnly) {
console.log('Test Skipped: ST 2110-20 Section 7.1 Test 1 - Use --videoOnly to check if all streams are video.');
}
if (params.videoOnly && params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.1 Test 1 - All streams are video');
}
return errors;
};
// ST 2110-10 Section 6.2 Test 1 - For all streams, check RTP parameters
const test_10_62_1 = (sdp, params) => {
let errors = [];
let lines = splitLines(sdp);
for (let x = 0; x < lines.length; x++) {
if (!lines[x].startsWith('m=')) {
continue;
}
let mediaMatch = lines[x].match(mediaPattern);
if (!mediaMatch) {
errors.push(new Error(`Line ${x + 1}: Found a media description with a pattern that is not acceptable.`));
continue;
}
// Check port number - ST 2110-10 Section 6.2 says shall be UDP, so assume 0-65535
let port = +mediaMatch[2];
if (isNaN(port) || port < 0 || port > 65535) {
errors.push(new Error(`Line ${x + 1}: RTP stream description with invalid port '${port}', with reference to ST 2110-10 Section 6.2 'shall use UDP'.`));
}
// Check RTP type - ST 2110-10 Section 6.2 says shall be RTP, no allowance for SRTP
if (mediaMatch[4] === 'RTP/SAVP') {
errors.push(new Error(`Line ${x + 1}: SRTP protocol is not allowed by ST 2110-10 Section 6.2.`));
}
// Check dynamic range - assume ST 2110-20 is always dynamic
let payloadType = +mediaMatch[5];
if (isNaN(payloadType) || payloadType < 96 || payloadType > 127) {
errors.push(new Error(`Line ${x + 1}: Dynamic payload type expected for ST 2110-defined media.`));
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10 Section 6.2 Test 1 - Media parameters present and all good.');
}
return errors;
};
const tsmodePermitted2022 = ['SAMP', 'NEW', 'PRES'];
// ST 2110-10:2022 Section 8.7 Test 1 - RTP Timestamp Mode and Delay, TSMODE and TSDELAY parameters are an acceptable value.
const test_10_2022_87_1 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, { checkDups: true });
for (let stream of mtParams) {
let keys = Object.keys(stream);
if (keys.indexOf('TSMODE') >= 0) {
if (tsmodePermitted2022.indexOf(stream.TSMODE) < 0) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'TSMODE' is not set to the required value as per ST 2110-10:2022 Section 8.7.`));
}
}
if (keys.indexOf('TSDELAY') >= 0) {
if (isNaN(stream.TSDELAY)) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'TSDELAY' is not set to the required value as per ST 2110-10:2022 Section 8.7.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-10:2022 Section 8.7 Test 1 - RTP Timestamp Mode and Delay, TSMODE and TSDELAY parameters are an acceptable value.');
}
return errors;
};
// Function to check that rtpmap is present and has passed in type and clockRate.
// An optional specification string can be used to be included in errors
// produced as a reference back to a spec
const checkStreamsRtpMap = (sdp, params, type, clockRate, specification) => {
let errors = [];
let lines = splitLines(sdp);
let rtpmapInStream = true;
let payloadType = -1;
let streamCount = 0;
for (let x = 0; x < lines.length; x++) {
if (lines[x].startsWith('m=')) {
if (!rtpmapInStream && payloadType >= 0) {
errors.push(new Error(`Line ${x + 1}: Stream ${streamCount} does not have an 'rtpmap' attribute.`));
}
let videoMatch = lines[x].match(videoPattern);
payloadType = videoMatch ? +videoMatch[4] : -1;
rtpmapInStream = false;
streamCount++;
continue;
}
if (lines[x].startsWith('a=rtpmap') && payloadType >= 0) {
if (rtpmapInStream) {
errors.push(new Error(`Line ${x + 1}: For stream ${streamCount}, found more than one 'rtpmap' attribute.`));
continue;
}
rtpmapInStream = true;
let rtpmapMatch = lines[x].match(rtpmapPattern);
if (!rtpmapMatch) {
errors.push(new Error(`Line ${x + 1}: For stream ${streamCount}, found an 'rtpmap' attribute that is not an acceptable pattern.`));
continue;
}
if (+rtpmapMatch[1] !== payloadType) {
errors.push(new Error(`Line ${x + 1}: For stream ${streamCount}, found an 'rtpmap' attribute with payload type '${rtpmapMatch[1]}' when stream has payload type '${payloadType}'.`));
}
if (skipVideoTypes.includes(rtpmapMatch[2])) {
continue;
} else if (rtpmapMatch[2] !== type) {
errors.push(new Error(`Line ${x + 1}: For stream ${streamCount}, encoding name must be media sub-type '${type}', as per ${specification}`));
}
if (rtpmapMatch[3] !== clockRate) {
errors.push(new Error(`Line ${x + 1}: For stream ${streamCount}, clock rate must be ${clockRate}Hz, as per ${specification}`));
}
}
}
if (!rtpmapInStream && payloadType >= 0) {
errors.push(new Error(`Line ${lines.length}: Stream ${streamCount} does not have an 'rtpmap' attribute.`));
}
return errors;
};
// ST 2110-20 Section 7.1 Test 3 - All video streams have rtpmap entry raw/90000
const test_20_71_3 = (sdp, params) => {
let errors = checkStreamsRtpMap(sdp, params, 'raw', '90000', 'ST 2110-20 Section 7.1');
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.1 Test 3 - All video streams have rtpmap entry raw/90000');
}
return errors;
};
// ST 2110-20 Section 7.1 Test 4 - All video streams have format parameters
const test_20_71_4 = (sdp, params) => {
let errors = [];
let lines = splitLines(sdp);
let fmtpInStream = true;
let isSkippedType = false;
let payloadType = -1;
let streamCount = 0;
for (let x = 0; x < lines.length; x++) {
if (lines[x].startsWith('m=')) {
if (!fmtpInStream && payloadType >= 0 && !isSkippedType) {
errors.push(new Error(`Line ${x + 1}: Stream ${streamCount} does not have an 'fmtp' attribute.`));
}
let videoMatch = lines[x].match(videoPattern);
payloadType = videoMatch ? +videoMatch[4] : -1;
fmtpInStream = false;
isSkippedType = false;
streamCount++;
continue;
}
if (lines[x].startsWith('a=rtpmap') && payloadType >= 0 && !isSkippedType) {
let rtpmapMatch = lines[x].match(rtpmapPattern);
if (!rtpmapMatch) {
continue;
}
if (skipVideoTypes.includes(rtpmapMatch[2])) {
isSkippedType = true;
continue;
}
}
if (lines[x].startsWith('a=fmtp') && payloadType >= 0) {
if (fmtpInStream) {
errors.push(new Error(`Line ${x + 1}: For stream ${streamCount}, found more than one 'fmtp' attribute.`));
continue;
}
fmtpInStream = true;
let fmtpMatch = lines[x].match(fmtpPattern);
if (!fmtpMatch) {
errors.push(new Error(`Line ${x + 1}: For stream ${streamCount}, found an 'fmtp' attribute that is not an acceptable pattern.`));
continue;
}
if (+fmtpMatch[1] !== payloadType) {
errors.push(new Error(`Line ${x + 1}: For stream ${streamCount}, found an 'fmtp' attribute with payload type '${fmtpMatch[1]}' when stream has payload type '${payloadType}'.`));
}
}
}
if (!fmtpInStream && payloadType >= 0 && !isSkippedType) {
errors.push(new Error(`Line ${lines.length}: Stream ${streamCount} does not have an 'fmtp' attribute.`));
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.1 Test 4 - All video streams have format parameters');
}
return errors;
};
// Test for duplicate parameters by setting params.checkDups
const extractMTParams = (sdp, params = {}) => {
let mtParams = [];
let errors = [];
let lines = splitLines(sdp);
let isSkippedType = false;
let streamCount = 0;
let payloadType = -1;
let mediaType = -1;
let encodingName = -1;
for (let x = 0; x < lines.length; x++) {
if (lines[x].startsWith('m=')) {
let mediaMatch = lines[x].match(mediaPattern);
if (mediaMatch) {
mediaType = mediaMatch[1];
payloadType = +mediaMatch[5];
}
else {
errors.push(new Error(`Line ${x + 1}: ${lines[x]} should be of the form 'm=mediaType udpPort RTP/AVP payloadType'`));
continue;
}
streamCount++;
isSkippedType = false;
continue;
}
if (lines[x].startsWith('a=rtpmap') && payloadType >= 0) {
let rtpmapMatch = lines[x].match(rtpmapPattern);
if (rtpmapMatch) {
encodingName = rtpmapMatch[2];
}
if (rtpmapMatch && skipVideoTypes.includes(rtpmapMatch[2])) {
isSkippedType = true;
continue;
}
}
if (lines[x].startsWith('a=fmtp') && payloadType >= 0 && !isSkippedType) {
if (!fmtpPattern.test(lines[x])) {
errors.push(new Error(`Line ${x + 1}: ${lines[x]} should be of the form 'a=fmtp:<format> parameter1=value1; parameter2=value2; ...'`));
continue;
}
let fmtParams = lines[x].split(/a=fmtp:\d+\s+/)[1];
let paramsMatch = [];
let paramMatch;
while ((paramMatch = fmtpParams.exec(fmtParams)) !== null)
paramsMatch.push(paramMatch);
let splitParams = paramsMatch.map(p => [p[1], p[2] || '']);
if (params.checkDups) {
let keys = splitParams.map(p => p[0]);
let reported = [];
for (let y = 0; y < keys.length; y++) {
if (keys.filter(k => keys[y] === k).length >= 2) {
if (reported.indexOf(keys[y]) < 0) {
errors.push(new Error(`Line ${x + 1}: For stream ${streamCount}, parameter '${keys[y]}' appears more than once.`));
reported.push(keys[y]);
}
}
}
}
let paramsObject = splitParams.reduce((x, y) => {
x[y[0]] = y[1];
return x;
}, {});
paramsObject._payloadType = payloadType;
paramsObject._line = x + 1;
paramsObject._streamNumber = streamCount;
paramsObject._mediaType = mediaType;
paramsObject._encodingName = encodingName;
mtParams.push(paramsObject);
}
}
// If no fmtp parameters still load up the other valid items (audio files for example)
if (mtParams.length == 0) {
let paramsObject = [];
paramsObject._payloadType = payloadType;
paramsObject._line = lines.length;
paramsObject._streamNumber = streamCount;
paramsObject._mediaType = mediaType;
paramsObject._encodingName = encodingName;
mtParams.push(paramsObject);
}
return [mtParams, errors];
};
const mustHaves20 = ['sampling', 'depth', 'width', 'height', 'exactframerate',
'colorimetry', 'PM', 'SSN'];
// ST 2110-20 Section 7.2 Test 1 - Test all required parameters are present
const test_20_72_1 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, { checkDups: true });
for (let stream of mtParams) {
if (stream._encodingName == 'raw') {
let keys = Object.keys(stream);
for (let param of mustHaves20) {
if (keys.indexOf(param) < 0) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, required parameter '${param}' is missing, as per ST 2110-20 Section 7.2.`));
}
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.2 Test 1 - All required parameters are present');
}
return errors;
};
// ST 2110-20 Section 7.2 Test 2 - Check width and height are within bounds
const test_20_72_2 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.width !== 'undefined' && typeof stream.height !== 'undefined') { // Test 1 confirms
let width = +stream.width;
if (isNaN(width) || integerPattern.test(stream.width) === false) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, parameter 'width' is not an integer value, as per ST 2110-20 Section 7.2.`));
} else if (width < 1 || width > 32767) {
errors.push(new Error(`Line ${stream._line}: For strean ${stream._streamNumber}, parameter 'width' with value '${width}' is outside acceptable range of 1 to 32767 inclusive, as per ST 2110-20 Section 7.2.`));
}
let height = +stream.height;
if (isNaN(height) || integerPattern.test(stream.height) === false) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, parameter 'height' is not an integer value, as per ST 2110-20 Section 7.2.`));
} else if (height < 1 || height > 32767) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, parameter 'height' with value '${height}' is outside acceptable range of 1 to 32767 inclusive, as per ST 2110-20 Section 7.2.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.2 Test 2 - Check width and height are within bounds');
}
return errors;
};
const greatestCommonDivisor = (a, b) => !b ? a : greatestCommonDivisor(b, a % b);
/*
Function to check ST 2110-20 Section 7.2
Checks for integer numerator/denominator when required
Checks if frame rate expressed as a ratio of integers is in lowest common denominator form.
**_exactframerate Signals the frame rate in frames per second. Integer frame rates shall be signaled as a single decimal number (e.g. “25”) whilst non-integer frame rates shall be signaled as a ratio of two integer decimal numbers separated by a “forward-slash”_**
*/
const checkExactframerate = (stream = {}) => {
let errors = [];
let frMatch = stream.exactframerate.match(frameRatePattern);
if (!frMatch) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, parameter 'exactframerate' does not match an acceptable pattern, as per ST 2110-20 Section 7.2.`));
return errors;
}
if (!frMatch[2]) { // Non-integer value tests
return errors;
}
let numerator = +frMatch[1];
let denominator = +frMatch[2];
if (Number.isInteger(numerator / denominator)) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, parameter 'exactframerate' is an integer rate expressed as a non-integer rational, as per ST 2110-20 Section 7.2.`));
}
if (denominator > numerator) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, parameter 'exactframerate' specifies a frame rate slower than one per second. Unlikely. Parameter order correct?`));
}
if (greatestCommonDivisor(numerator, denominator) !== 1) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, parameter 'exactframerate' specifies a frame rate using integer values that are not the minimum possible, as per ST 2110-20 Section 7.2.`));
}
return errors;
};
// ST 2110-20 Section 7.2 Test 3 - Exactframerate is as specified
const test_20_72_3 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.exactframerate !== 'undefined') {
errors = errors.concat(checkExactframerate(stream));
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.2 Test 3 - Exactframerate is as specified');
}
return errors;
};
const packingModes = ['2110GPM', '2110BPM'];
// ST 2110-20 Section 7.2 Test 4 - Check packing mode as per spec.
const test_20_72_4 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.PM !== 'undefined') {
if (packingModes.indexOf(stream.PM) < 0) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, parameter 'PM' (packing mode) is not one of the defined values, as per ST 2110-20 Sections 7.2 and 6.3.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.2 Test 4 - Packing mode is as per spec.');
}
return errors;
};
const ssnPermitted20 = ['ST2110-20:2017', 'ST2110-20:2022'];
// ST 2110-20 Section 7.2 Test 5 - Check SSN is the required fixed value
// [also ST 2110-20:2022 Section 7.2]
const test_20_72_5 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.SSN !== 'undefined') {
if (ssnPermitted20.indexOf(stream.SSN) < 0) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'SSN' is not set to the required value as per ST 2110-20 [also ST 2110-20:2022 Section 7.2].`));
} else {
let detect2022tcs = typeof stream.TCS !== 'undefined' && stream.TCS === 'ST2115LOGS3';
let detect2022colorimetry = typeof stream.colorimetry !== 'undefined' && stream.colorimetry === 'ALPHA';
if ((detect2022tcs || detect2022colorimetry) && stream.SSN === 'ST2110-20:2017') {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'SSN' is not set to the required value as per ST 2110-20:2022 Section 7.2.`));
}
if (!(detect2022tcs || detect2022colorimetry) && stream.SSN !== 'ST2110-20:2017') {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'SSN' is not set to the required value as per ST 2110-20:2022 Section 7.2.`));
}
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.2 [also ST 2110-20:2022 Section 7.2] Test 5 - SSN is the required fixed value.');
}
return errors;
};
// ST 2110-20 Section 7.3 Test 1 - Interlace is name only
const test_20_73_1 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.interlace !== 'undefined') {
if (stream.interlace !== '') {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'interlace' is name only, as per ST 2110-20 Section 7.3.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.3 Test 1 - Interlace is name only');
}
return errors;
};
// ST 2110-20 Section 7.3 Test 2 - Segmented is name only and interlace is also signalled
const test_20_73_2 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.segmented !== 'undefined') {
if (stream.segmented !== '') {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'segmented' is name only, as per ST 2110-20 Section 7.3.`));
}
if (typeof stream.interlace === 'undefined') {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'segmented' is signalled without 'interlace' being signalled, as per ST 2110-20 Section 7.3.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.3 Test 2 - Segmented is name only and interlace is also signalled');
}
return errors;
};
const rangePermitted = ['NARROW', 'FULLPROTECT', 'FULL'];
// ST 2110-20 Section 7.3 Test 3 - RANGE has acceptable values in colorimetry context
const test_20_73_3 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.RANGE !== 'undefined') {
if (stream.colorimetry === 'BT2100') {
if (stream.RANGE !== 'FULL' && stream.RANGE !== 'NARROW') {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'RANGE' is '${stream.RANGE}' and not one of the acceptable values for colorimetry BT.2100 of 'FULL' or 'NARROW', as per ST 2110-20 Section 7.3`));
}
continue;
}
if (rangePermitted.indexOf(stream.RANGE) < 0) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'RANGE' is '${stream.RANGE}' and not one of the acceptable values 'FULL', 'FULLPROTECT' or 'NARROW', as per ST 2110-20 Section 7.3.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.3 Test 3 - RANGE has acceptable values in colorimetry context');
}
return errors;
};
const maxudpPermitted = ['1460', '8960'];
// ST 2110-20 Section 7.3 Test 4 - MAXUDP has acceptable values per ST 2110-10
const test_20_73_4 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.MAXUDP !== 'undefined') {
if (maxudpPermitted.indexOf(stream.MAXUDP) < 0) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'MAXUDP' is '${stream.MAXUDP}' and not one of the acceptable values '1460' or '8960', as per ST 2110-20 Section 7.3.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.3 Test 4 - MAXUDP has acceptable values per ST 2110-10');
}
return errors;
};
// ST 2110-20 Section 7.3 Test 5 - PAR is an acceptable value
const test_20_73_5 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.PAR !== 'undefined') {
let parMatch = stream.PAR.match(parPattern);
if (!parMatch) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'PAR' is not an acceptable pattern, as per ST 2110-20 Section 7.3.`));
continue;
}
let [numerator, denominator] = [+parMatch[1], +parMatch[2]];
if (greatestCommonDivisor(numerator, denominator) > 1) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'PAR' with value '${stream.PAR}' is a ratio that is not expressed with the smallest possible values, as per ST 2110-20 Section 7.3.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.3 Test 5 - PAR is an acceptable value');
}
return errors;
};
const samplingPermitted = [
'YCbCr-4:4:4', 'YCbCr-4:2:2', 'YCbCr-4:2:0',
'CLYCbCr-4:4:4', 'CLYCbCr-4:2:2', 'CLYCbCr-4:2:0',
'ICtCp-4:4:4', 'ICtCp-4:2:2', 'ICtCp-4:2:0',
'RGB', 'XYZ', 'KEY'
];
// ST 2110-20 Section 7.4 Test 1 - Sampling is a defined value
const test_20_74_1 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.sampling !== 'undefined') {
if (samplingPermitted.indexOf(stream.sampling) < 0) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'sampling' is not an acceptable value, as per ST 2110-20 Section 7.4.1.`));
continue;
}
// TODO colorimetry-specific tests - if possible
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.4 Test 1 - Sampling is a defined value');
}
return errors;
};
const depthPermitted = ['8', '10', '12', '16', '16f'];
// ST 2110-20 Section 7.4 Test 2 - Bit depth is a permitted value
const test_20_74_2 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.depth !== 'undefined') {
if (depthPermitted.indexOf(stream.depth) < 0) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'depth' is not one of 8, 10, 12 or 16/16f, as per ST 2110-20 Section 7.4.2.`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.4 Test 2 - Bit depth is a permitted value');
}
return errors;
};
const colorPermitted20_2017 = [
'BT601', 'BT709', 'BT2020', 'BT2100', 'ST2065-1',
'ST2065-3', 'UNSPECIFIED', 'XYZ'];
const colorPermitted20_2022 = ['ALPHA'];
// ST 2110-20 Section 7.5 Test 1 - Colorimetry is a permitted value.
// [also ST 2110-20:2022 Section 7.4]
const test_20_75_1 = (sdp, params) => {
let [mtParams, errors] = extractMTParams(sdp, params);
for (let stream of mtParams) {
if (typeof stream.colorimetry !== 'undefined') {
if (colorPermitted20_2017.indexOf(stream.colorimetry) < 0 && colorPermitted20_2022.indexOf(stream.colorimetry) < 0) {
errors.push(new Error(`Line ${stream._line}: For stream ${stream._streamNumber}, format parameter 'colorimetry' is not a permitted value, as per ST 2110-20 Section 7.5 [also ST 2110-20:2022 Section 7.4].`));
}
}
}
if (params.verbose && errors.length == 0) {
console.log('Test Passed: ST 2110-20 Section 7.5 Test 1 - Colorimetry is a permitted value.');
}
return errors;
};
// ST 2110-20 Section 7.5 Test 2 - Signals using BT.2100 should specify RANGE
const test_20_75_2 = (sdp, params) => {
if (!params.should) {