snapshot of https://github.com/RocketChat/Rocket.Chat.git (develop, 2026-09-16; blobs > 131072B omitted)

packages/mp3-encoder/src/lame/Presets.ts

@@ -0,0 +1,126 @@
+import { ABRPresets } from './ABRPresets';
+import type { LameGlobalFlags } from './LameGlobalFlags';
+import type { Quality } from './Quality';
+import { VBRPresets } from './VBRPresets';
+import { VbrMode } from './VbrMode';
+
+const enum Preset {
+	V9 = 410,
+	V8 = 420,
+	V7 = 430,
+	V6 = 440,
+	V5 = 450,
+	V4 = 460,
+	V3 = 470,
+	V2 = 480,
+	V1 = 490,
+	V0 = 500,
+	R3MIX = 1000,
+	STANDARD = 1001,
+	EXTREME = 1002,
+	INSANE = 1003,
+	STANDARD_FAST = 1004,
+	EXTREME_FAST = 1005,
+	MEDIUM = 1006,
+	MEDIUM_FAST = 1007,
+}
+
+export class Presets {
+	private readonly vbrPresets = new VBRPresets();
+
+	public readonly abrPresets = new ABRPresets();
+
+	apply(gfp: LameGlobalFlags, preset: Preset) {
+		switch (preset) {
+			case Preset.R3MIX: {
+				preset = Preset.V3;
+				gfp.VBR = VbrMode.vbr_mtrh;
+				break;
+			}
+			case Preset.MEDIUM: {
+				preset = Preset.V4;
+				gfp.VBR = VbrMode.vbr_rh;
+				break;
+			}
+			case Preset.MEDIUM_FAST: {
+				preset = Preset.V4;
+				gfp.VBR = VbrMode.vbr_mtrh;
+				break;
+			}
+			case Preset.STANDARD: {
+				preset = Preset.V2;
+				gfp.VBR = VbrMode.vbr_rh;
+				break;
+			}
+			case Preset.STANDARD_FAST: {
+				preset = Preset.V2;
+				gfp.VBR = VbrMode.vbr_mtrh;
+				break;
+			}
+			case Preset.EXTREME: {
+				preset = Preset.V0;
+				gfp.VBR = VbrMode.vbr_rh;
+				break;
+			}
+			case Preset.EXTREME_FAST: {
+				preset = Preset.V0;
+				gfp.VBR = VbrMode.vbr_mtrh;
+				break;
+			}
+			case Preset.INSANE: {
+				gfp.preset = 320;
+				gfp.VBR = VbrMode.vbr_off;
+				this.abrPresets.apply(gfp, 320);
+				return 320;
+			}
+		}
+
+		gfp.preset = preset;
+
+		switch (preset) {
+			case Preset.V9:
+				this.vbrPresets.apply(gfp, 9);
+				return preset;
+			case Preset.V8:
+				this.vbrPresets.apply(gfp, 8);
+				return preset;
+			case Preset.V7:
+				this.vbrPresets.apply(gfp, 7);
+				return preset;
+			case Preset.V6:
+				this.vbrPresets.apply(gfp, 6);
+				return preset;
+			case Preset.V5:
+				this.vbrPresets.apply(gfp, 5);
+				return preset;
+			case Preset.V4:
+				this.vbrPresets.apply(gfp, 4);
+				return preset;
+			case Preset.V3:
+				this.vbrPresets.apply(gfp, 3);
+				return preset;
+			case Preset.V2:
+				this.vbrPresets.apply(gfp, 2);
+				return preset;
+			case Preset.V1:
+				this.vbrPresets.apply(gfp, 1);
+				return preset;
+			case Preset.V0:
+				this.vbrPresets.apply(gfp, 0);
+				return preset;
+			default:
+				break;
+		}
+
+		if (preset >= 8 && preset <= 320) {
+			return this.abrPresets.apply(gfp, preset);
+		}
+
+		gfp.preset = 0;
+		return preset;
+	}
+
+	applyPresetFromQuality(gfp: LameGlobalFlags, quality: Quality) {
+		return this.apply(gfp, 500 - 10 * quality);
+	}
+}