Enable one core multiple run capabilities

fftools/ffmpeg.c

@@ -4816,11 +4816,26 @@ static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
 {
 }
 
+static void init_variables() {
+  input_streams     = NULL;
+  nb_input_streams  = 0;
+  input_files       = NULL;
+  nb_input_files    = 0;
+  output_streams    = NULL;
+  nb_output_streams = 0;
+  output_files      = NULL;
+  nb_output_files   = 0;
+  filtergraphs      = NULL;
+  nb_filtergraphs   = 0;
+  ffmpeg_exited     = 0;
+}
+
 int main(int argc, char **argv)
 {
     int i, ret;
     BenchmarkTimeStamps ti;
 
+    init_variables();
     init_dynload();
 
     register_exit(ffmpeg_cleanup);

wasm/tests/multiple-round.test.js

 const fs = require('fs');
 const path = require('path');
+const createFFmpegCore = require('../dist/ffmpeg-core');
 const { TIMEOUT } = require('./config');
-const { runFFmpeg } = require('./utils');
+const { runFFmpeg, ffmpeg } = require('./utils');
 const IN_FILE_NAME = 'video-1s.avi';
 const OUT_FILE_NAME = 'video.mp4';
 const MP4_SIZE = 38372;
 let aviData = null;
+let resolve = null;
+let Core = null;
 
-beforeAll(() => {
+beforeAll(async () => {
   aviData = Uint8Array.from(fs.readFileSync(path.join(__dirname, 'data', IN_FILE_NAME)));
-});
+  Core = await createFFmpegCore({
+    printErr: (m) => {
+    },
+    print: (m) => {
+      if (m.startsWith('FFMPEG_END')) {
+        resolve();
+      }
+    }
+  });
+}, TIMEOUT);
 
 test('should transcode to mp4 twice', async () => {
-  for (let i = 0 ; i < 2; i++) {
-    const args = ['-i', IN_FILE_NAME, OUT_FILE_NAME];
-    const { fileSize } = await runFFmpeg(IN_FILE_NAME, aviData, args, OUT_FILE_NAME);
-    expect(fileSize).toBe(MP4_SIZE);
+  const args = ['-i', IN_FILE_NAME, OUT_FILE_NAME];
+  Core.FS.writeFile(IN_FILE_NAME, aviData);
+  for (let i = 0; i < 2; i++) {
+    ffmpeg(Core, args);
+    await new Promise((_resolve) => { resolve = _resolve });
+    expect(Core.FS.readFile(OUT_FILE_NAME).length).toBe(MP4_SIZE);
+    Core.FS.unlink(OUT_FILE_NAME);
   }
 }, TIMEOUT);

wasm/tests/utils.js

@@ -15,7 +15,7 @@ const ffmpeg = (Core, args) => {
     'proxy_main',
     'number',
     ['number', 'number'],
-    parseArgs(Core, ['ffmpeg', '-nostdin', ...args]),
+    parseArgs(Core, ['ffmpeg', '-hide_banner', '-nostdin', ...args]),
   );
 };
 
@@ -44,4 +44,5 @@ const runFFmpeg = async (ifilename, data, args, ofilename) => {
 
 module.exports = {
   runFFmpeg,
+  ffmpeg,
 };