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 nodes = writable([]);
export const edges = writable([]);
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export const auto = writable(true);
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export const selectedFilter = writable();
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addNode({ name: "punch.mp4" }, "input");
addNode({ name: "out.mp4" }, "output");
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export function makeFilterArgs(f) {
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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 previewCommand = derived([edges, nodes], ([$edges, $nodes]) => {
let hasVid = false;
let hasAud = false;
let finalCommand = [];
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let filtergraph = [];
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const inputs = $nodes.filter((n) => n.nodeType == "input");
const outputs = $nodes.filter((n) => n.nodeType == "output");
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const inputIds = {};
for (let i = 0; i < inputs.length; i++) {
const inp = inputs[i];
inputIds[inp.id] = i;
}
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const edgeIds = {};
for (let i = 0; i < $edges.length; i++) {
const e = $edges[i];
edgeIds[e.id] = i + 1;
const source = $nodes.find((n) => n.id === e.source);
const target = $nodes.find((n) => n.id === e.target);
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if (source && target) {
if (source.nodeType === "input") {
if (e.sourceHandle.includes("v")) {
edgeIds[e.id] = inputIds[source.id] + ":v";
}
if (e.sourceHandle.includes("a")) {
edgeIds[e.id] = inputIds[source.id] + ":a";
}
}
if (target.nodeType === "output") {
const outType = e.targetHandle.includes("a") ? "aud_out" : "vid_out";
edgeIds[e.id] = outType;
}
}
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}
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for (let n of $nodes.filter((n) => n.nodeType == "filter")) {
let cmd = "";
const outs = $edges.filter((e) => e.source == n.id);
const ins = $edges.filter((e) => e.target == n.id);
if (outs.length == 0 && ins.length == 0) continue;
for (let i of ins) {
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const eid = edgeIds[i.id];
cmd += `[${eid}]`;
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}
cmd += makeFilterArgs(n.data);
for (let o of outs) {
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const eid = edgeIds[o.id];
cmd += `[${eid}]`;
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}
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filtergraph.push(cmd);
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}
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finalCommand.push("ffmpeg");
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for (let inp of inputs) {
finalCommand.push("-i");
finalCommand.push(inp.data.name);
}
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if (filtergraph.length > 0) {
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const fg = '"' + filtergraph.join(";") + '"';
hasVid = fg.includes(":v]");
hasAud = fg.includes(":a]");
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finalCommand.push("-filter_complex");
finalCommand.push(fg);
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finalCommand.push("-map");
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if (hasAud) {
finalCommand.push('"[aud_out]"');
} else {
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finalCommand.push("0:a");
}
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finalCommand.push("-map");
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if (hasVid) {
finalCommand.push('"[vid_out]"');
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} else {
finalCommand.push("0:v");
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}
}
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for (let out of outputs) {
finalCommand.push(out.data.name);
}
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const entireCommand = finalCommand.join(" ");
return entireCommand;
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});
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export const inputs = derived(nodes, ($nodes) => {
return $nodes.filter((n) => n.nodeType === "input").map((n) => n.data);
});
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nodes.subscribe(($nodes) => {
const isAuto = get(auto);
if (!isAuto) return;
const outputNodes = $nodes.filter((n) => n.nodeType === "output");
const inputNodes = $nodes.filter((n) => n.nodeType === "input");
const filterNodes = $nodes.filter((n) => n.nodeType === "filter");
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const orderedNodes = [].concat(filterNodes, outputNodes).filter((n) => n != undefined);
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const filled = [];
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let newEdges = [];
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function connectNode(n1, rest) {
for (let i = 0; i < n1.data.outputs.length; i++) {
const edgeType = n1.data.outputs[i];
for (let j = 0; j < rest.length; j++) {
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let found = false;
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const n2 = rest[j];
for (let k = 0; k < n2.data.inputs.length; k++) {
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const targetEdgeType = n2.data.inputs[k];
if (edgeType === targetEdgeType && !filled.includes(n2.id + k)) {
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newEdges.push({
id: uuidv4(),
type: "default",
source: n1.id,
target: n2.id,
sourceHandle: edgeType + "_" + i,
targetHandle: edgeType + "_" + k,
});
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filled.push(n2.id + k);
found = true;
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break;
}
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}
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if (found) break;
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}
}
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const nextNode = rest.shift();
if (nextNode) {
connectNode(nextNode, rest);
}
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}
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for (let inpNode of inputNodes) {
connectNode(inpNode, [...orderedNodes]);
}
// console.log("new", newEdges);
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edges.set(newEdges);
});
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export function addNode(_data, type) {
const data = JSON.parse(JSON.stringify(_data));
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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;
});
}
}
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data.nodeType = type;
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data.inputs = ins;
data.outputs = outs;
let node = {
id: uuidv4(),
type: "ffmpeg",
data: data,
nodeType: type,
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position: { x: 0, y: 0 },
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};
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nodes.update((_nodes) => {
_nodes.push(node);
const isAuto = get(auto);
if (isAuto) {
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const w = 120;
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const h = 50;
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const margin = 50;
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let prev = null;
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for (let n of _nodes) {
if (n.nodeType === "input") {
n.position = { x: 0, y: prev ? prev.position.y + h + margin : 0 };
prev = n;
}
}
for (let n of _nodes) {
if (n.nodeType === "filter") {
let _w = prev && prev.width ? prev.width : w;
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n.position = { x: prev ? prev.position.x + _w + margin : 0, y: -50 };
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prev = n;
}
}
for (let n of _nodes) {
if (n.nodeType === "output") {
let _w = prev && prev.width ? prev.width : w;
n.position = { x: prev ? prev.position.x + _w + margin : 0, y: 0 };
}
}
}
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if (node.nodeType === "filter") {
selectedFilter.set(_nodes.length - 1);
}
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return _nodes;
});
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}
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export function resetNodes() {
nodes.set([]);
addNode({ name: "punch.mp4" }, "input");
addNode({ name: "out.mp4" }, "output");
}
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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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}
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export function removeEdge(id) {
edges.update((_edges) => {
const index = _edges.findIndex((e) => e.id === id);
_edges.splice(index, 1);
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return _edges;
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});
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}