feat: CHARACTERISTICS support

Author: matvp91

apps/stitcher/src/parser/lexical-parse.ts

@@ -67,6 +67,7 @@ export interface Media {
   channels?: string;
   default?: boolean;
   autoSelect?: boolean;
+  characteristics?: string[];
 }
 
 export interface CueOut {
@@ -195,6 +196,9 @@ function parseLine(line: string): Tag | null {
           case "AUTOSELECT":
             attrs.autoSelect = value === "YES" ? true : false;
             break;
+          case "CHARACTERISTICS":
+            attrs.characteristics = value.split(",").map((char) => char.trim());
+            break;
         }
       });
 
@@ -213,6 +217,7 @@ function parseLine(line: string): Tag | null {
           channels: attrs.channels,
           default: attrs.default,
           autoSelect: attrs.autoSelect,
+          characteristics: attrs.characteristics,
         },
       ];
     }

apps/stitcher/src/parser/parse.ts

@@ -34,6 +34,7 @@ function formatMasterPlaylist(tags: Tag[]): MasterPlaylist {
         language: value.language,
         default: value.default,
         autoSelect: value.autoSelect,
+        characteristics: value.characteristics,
       });
     }
     if (name === "EXT-X-STREAM-INF") {

apps/stitcher/src/parser/stringify.ts

@@ -36,6 +36,9 @@ export function stringifyMasterPlaylist(playlist: MasterPlaylist) {
     if (rendition.channels) {
       attrs.push(`CHANNELS="${rendition.channels}"`);
     }
+    if (rendition.characteristics) {
+      attrs.push(`CHARACTERISTICS="${rendition.characteristics.join(",")}"`);
+    }
     lines.push(`#EXT-X-MEDIA:${attrs.join(",")}`);
   });
 

apps/stitcher/src/parser/types.ts

@@ -14,6 +14,7 @@ export interface Rendition {
   channels?: string;
   default?: boolean;
   autoSelect?: boolean;
+  characteristics?: string[];
 }
 
 export interface Variant {

apps/stitcher/test/parser/__snapshots__/parse-master.test.ts.snap

@@ -38,6 +38,7 @@ exports[`parse master should parse with groups 1`] = `
     {
       "autoSelect": true,
       "channels": undefined,
+      "characteristics": undefined,
       "default": true,
       "groupId": "aud1",
       "language": "eng",
@@ -48,6 +49,7 @@ exports[`parse master should parse with groups 1`] = `
     {
       "autoSelect": true,
       "channels": undefined,
+      "characteristics": undefined,
       "default": true,
       "groupId": "aud2",
       "language": "nld",
@@ -58,6 +60,7 @@ exports[`parse master should parse with groups 1`] = `
     {
       "autoSelect": true,
       "channels": undefined,
+      "characteristics": undefined,
       "default": true,
       "groupId": "sub1",
       "language": "eng",
@@ -100,6 +103,7 @@ exports[`parse master should parse with audio channels 1`] = `
     {
       "autoSelect": true,
       "channels": "6",
+      "characteristics": undefined,
       "default": true,
       "groupId": "aud1",
       "language": "eng",