Add Worker.trim

src/createWorker.js

@@ -69,18 +69,31 @@ module.exports = (_options = {}) => {
     }))
   );
 
-  const transcode = (inputPath, outputPath, opts, jobId) => (
+  const writeText = async (path, text, jobId) => (
     startJob(createJob({
       id: jobId,
-      action: 'transcode',
+      action: 'writeText',
       payload: {
-        inputPath,
-        outputPath,
-        options: opts,
+        path,
+        text,
       },
     }))
   );
 
+  const run = (args, jobId) => (
+    startJob(createJob({
+      id: jobId, action: 'run', payload: { args },
+    }))
+  );
+
+  const transcode = (inputPath, outputPath, opts = '', jobId) => (
+    run(`${opts} -i ${inputPath} ${outputPath}`, jobId)
+  );
+
+  const trim = (inputPath, outputPath, from, to, opts = '', jobId) => (
+    run(`${opts} -ss ${from} -i ${inputPath} -t ${to} -c copy ${outputPath}`, jobId)
+  );
+
   const read = (path, jobId) => (
     startJob(createJob({
       id: jobId, action: 'read', payload: { path },
@@ -99,12 +112,6 @@ module.exports = (_options = {}) => {
     }))
   );
 
-  const run = (args, jobId) => (
-    startJob(createJob({
-      id: jobId, action: 'run', payload: { args },
-    }))
-  );
-
   const terminate = async (jobId) => {
     if (worker !== null) {
       await startJob(createJob({
@@ -145,7 +152,9 @@ module.exports = (_options = {}) => {
     setReject,
     load,
     write,
+    writeText,
     transcode,
+    trim,
     read,
     remove,
     mkdir,

src/worker-script/index.js

@@ -26,11 +26,6 @@ const strList2ptr = (strList) => {
   return listPtr;
 };
 
-const doRun = (_args) => {
-  const args = [...defaultArgs, ..._args.trim().split(' ')];
-  ffmpeg(args.length, strList2ptr(args));
-};
-
 const load = ({ workerId, payload: { options: { corePath } } }, res) => {
   if (Module == null) {
     const Core = adapter.getCore(corePath);
@@ -61,15 +56,14 @@ const write = ({
   res.resolve({ message: `Write ${path} (${d.length} bytes)` });
 };
 
-const transcode = ({
+const writeText = ({
   payload: {
-    inputPath,
-    outputPath,
-    options = '',
+    path,
+    text,
   },
 }, res) => {
-  doRun(`${options} -i ${inputPath} ${outputPath}`);
-  res.resolve({ message: `Complete transcoding ${inputPath} to ${outputPath}` });
+  Module.FS.writeFile(path, text);
+  res.resolve({ message: `Write ${path} (${text.length} bytes)` });
 };
 
 const read = ({
@@ -100,11 +94,12 @@ const mkdir = ({
 
 const run = ({
   payload: {
-    args,
+    args: _args,
   },
 }, res) => {
-  doRun(args);
-  res.resolve({ message: `Complete ./ffmpeg ${args}` });
+  const args = [...defaultArgs, ..._args.trim().split(' ')];
+  ffmpeg(args.length, strList2ptr(args));
+  res.resolve({ message: `Complete ${args.join(' ')}` });
 };
 
 exports.dispatchHandlers = (packet, send) => {
@@ -124,7 +119,7 @@ exports.dispatchHandlers = (packet, send) => {
     ({
       load,
       write,
-      transcode,
+      writeText,
       read,
       remove,
       mkdir,