ffmpeg-explorer/src/stores.js

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import { v4 as uuidv4 } from "uuid";
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import { writable, derived, get } from "svelte/store";
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// export const inputs = writable([]);
// export const output = writable("out.mp4");
// export const filters = writable([]);
export const nodes = writable([]);
export const edges = writable([]);
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addNode({ name: "punch.mp4" }, "input");
addNode({ name: "out.mp4" }, "output");
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function makeFilterArgs(f) {
let fCommand = f.name;
if (f.params && f.params.length > 0) {
let params = f.params
.map((p) => {
if (p.value === "" || p.value === null || p.value === p.default) return null;
return `${p.name}=${p.value}`;
})
.filter((p) => p !== null)
.join(":");
if (params) fCommand += "=" + params;
}
return fCommand;
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}
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export const command = derived(edges, ($edges) => {
console.log($edges);
return $edges;
});
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export const previewCommand = derived(nodes, ($nodes) => {
const cInputs = $nodes
.filter((n) => n.nodeType === "input")
.map((i) => `-i ${i.data.name}`)
.join(" ");
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const cOutput = $nodes
.filter((n) => n.nodeType === "output")
.map((i) => `${i.data.name}`)
.join(" ");
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const cFilters = $nodes
.filter((n) => n.nodeType === "filter")
.map((n) => n.data)
.map(makeFilterArgs)
.join(",");
let out = `ffmpeg ${cInputs}`;
if (cFilters) out += ` -filter_complex "${cFilters}"`;
out += ` ${cOutput}`;
return out;
});
export const inputs = derived(nodes, ($nodes) => {
return $nodes.filter((n) => n.nodeType === "input").map((n) => n.data);
});
export const filters = derived(nodes, ($nodes) => {
return $nodes.filter((n) => n.nodeType === "filter").map((n) => n.data);
});
export const output = derived(nodes, ($nodes) => {
return $nodes.filter((n) => n.nodeType === "output").map((n) => n.data);
});
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export function addNode(data, type) {
let ins = [];
let outs = [];
if (type === "input") {
outs = ["v", "a"];
} else if (type === "output") {
ins = ["v", "a"];
} else if (type === "filter") {
const [_ins, _outs] = data.type.split("->");
ins = _ins.toLowerCase().split("");
outs = _outs.toLowerCase().split("");
if (data.params) {
data.params = data.params.map((p) => {
p.value = null;
if (p.default != null) p.value = p.default;
return p;
});
}
}
let x = 0;
let y = 0;
const w = 100;
const h = 50;
const margin = 10;
const existing = get(nodes);
if (type === "input") {
const inps = existing.filter((n) => n.nodeType === "input");
y = inps.length * h;
} else if (type === "filter") {
const flts = existing.filter((n) => n.nodeType === "filter");
x = (flts.length + 1) * w;
} else if (type === "output") {
x = 500;
}
data.inputs = ins;
data.outputs = outs;
let node = {
id: uuidv4(),
type: "ffmpeg",
data: data,
nodeType: type,
position: { x, y },
};
nodes.update((n) => {
n.push(node);
return n;
});
edges.update((_edges) => {
console.log('EXISTING', existing);
const target = existing[existing.length -2];
if (!target) return _edges;
const newEdge = {
id: uuidv4(),
type: "default",
source: node.id,
target: target.id,
};
console.log("NEW EDGE", newEdge);
_edges.push(newEdge);
return _edges;
});
}
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export function removeNode(id) {
nodes.update((_nodes) => {
const index = _nodes.findIndex((n) => n.id === id);
_nodes.splice(index, 1);
return _nodes;
});
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}