Entries and playlists

src/entry.ts

@@ -0,0 +1,17 @@
+import { Producer } from "./producer";
+
+export class Entry {
+	constructor(
+		public producer: Producer,
+		public in_point: string,
+		public out_point: string
+	) {}
+
+	toXML(): string {
+		return /* HTML */ `<entry
+			producer="${this.producer.id}"
+			in="${this.in_point}"
+			out="${this.out_point}"
+		></entry>`;
+	}
+}

src/example.test.ts

@@ -1,4 +1,5 @@
 import { $ } from "zx";
+import { Entry } from "./entry";
 import Project from "./kdenlive";
 
 describe("Kdenlive", () => {
@@ -58,4 +59,48 @@ describe("Kdenlive", () => {
 			await $`echo ${await project.toXML()} > 20a20v-tracks.kdenlive`;
 		});
 	});
+
+	describe("clips", () => {
+		it("should generate a 1a1v project with one clip", async () => {
+			const project = new Project(30);
+			const producer = project.addProducer("/home/kuba/Videos/5min.mp4");
+			const video_track = project.addVideoTractor();
+			const audio_track = project.addAudioTractor();
+			const entry = new Entry(producer, "00:00:00.000", "00:00:01.000");
+			video_track.addEntry(entry);
+			audio_track.addEntry(entry);
+			await $`echo ${await project.toXML()} > 1s-clip.kdenlive`;
+		});
+
+		it("should generate a 1a1v project with two contingent clips", async () => {
+			const project = new Project(30);
+			const producer = project.addProducer("/home/kuba/Videos/5min.mp4");
+			const video_track = project.addVideoTractor();
+			const audio_track = project.addAudioTractor();
+			const entry = new Entry(producer, "00:00:00.000", "00:00:01.000");
+			video_track.addEntry(entry);
+			audio_track.addEntry(entry);
+			const entry2 = new Entry(producer, "00:00:01.000", "00:00:02.000");
+			video_track.addEntry(entry2);
+			audio_track.addEntry(entry2);
+			await $`echo ${await project.toXML()} > 2x1s-clip.kdenlive`;
+		});
+
+		it("should generate a 1a1v project with 20 contingent clips", async () => {
+			const project = new Project(30);
+			const producer = project.addProducer("/home/kuba/Videos/5min.mp4");
+			const video_track = project.addVideoTractor();
+			const audio_track = project.addAudioTractor();
+			for (let i = 0; i <= 20; i++) {
+				let entry = new Entry(
+					producer,
+					`00:00:${i.toString().padStart(2, "0")}.000`,
+					`00:00:${(i + 1).toString().padStart(2, "0")}.000`
+				);
+				video_track.addEntry(entry);
+				audio_track.addEntry(entry);
+			}
+			await $`echo ${await project.toXML()} > 20x1s-clip.kdenlive`;
+		});
+	});
 });

src/playlist.ts

@@ -1,23 +1,36 @@
+import { Entry } from "./entry";
 import { makeIDGen } from "./util";
 
 const playlistIndexGen = makeIDGen(0);
 
 export abstract class Playlist {
+	public entries: Entry[] = [];
 	constructor(public index = playlistIndexGen.next().value) {}
 
 	abstract toXML(): string;
+
+	addEntry(entry: Entry) {
+		this.entries.push(entry);
+	}
+
+	renderEntries() {
+		return this.entries.map((e) => e.toXML()).join("\n");
+	}
 }
 
 export class AudioPlaylist extends Playlist {
 	toXML() {
-		return /* HTML */ ` <playlist id="playlist${this.index}">
+		return /* HTML */ `<playlist id="playlist${this.index}">
 			<property name="kdenlive:audio_track">1</property>
+			${this.renderEntries()}
 		</playlist>`;
 	}
 }
 
 export class VideoPlaylist extends Playlist {
 	toXML() {
-		return /* HTML */ ` <playlist id="playlist${this.index}"></playlist>`;
+		return /* HTML */ ` <playlist id="playlist${this.index}">
+			${this.renderEntries()}
+		</playlist>`;
 	}
 }

src/producer.ts

@@ -9,18 +9,22 @@ export abstract class Producer {
 		this.index = producerIndexGen.next().value;
 	}
 
-	async getNativeMltXml(fps: number) {
+	async getNativeMltXml(fps: number): Promise<string> {
 		const xml = (
 			await $`melt ${
 				this.path
 			} -consumer xml ${`frame_rate_num=${fps}`} | htmlq producer`
 		).stdout;
-		return xml.replace("producer0", `producer${this.index}`);
+		return xml.replace("producer0", this.id);
 	}
 
-	async toXML(fps: number) {
+	async toXML(fps: number): Promise<string> {
 		return await this.getNativeMltXml(fps);
 	}
+
+	get id() {
+		return "producer" + this.index;
+	}
 }
 
 export class ConcreteProducer extends Producer {
@@ -87,4 +91,8 @@ export class BlackTrack extends Producer {
 			<property name="set.test_audio">0</property>
 		</producer>`;
 	}
+
+	get id() {
+		return "black_track";
+	}
 }

src/tractor.ts

@@ -1,3 +1,4 @@
+import { Entry } from "./entry";
 import { AudioPlaylist, Playlist, VideoPlaylist } from "./playlist";
 import { makeIDGen } from "./util";
 
@@ -9,6 +10,11 @@ export abstract class Tractor {
 	public index = trackIndexGen.next().value;
 
 	abstract toXML(): string;
+
+	addEntry(entry: Entry): this {
+		this.main_playlist.addEntry(entry);
+		return this;
+	}
 }
 
 export class AudioTractor extends Tractor {