Implement cdrom_getPlayingInfo

src/cdrom.emscripten.c

@@ -59,7 +59,9 @@ int cdrom_stop() {
 	return OK;
 }
 
-int cdrom_getPlayingInfo (cd_time *info) {
-	info->t = info->m = info->s = info->f = 999;
-	return NG;
+int cdrom_getPlayingInfo(cd_time *info) {
+	int t = EM_ASM_INT_V( return xsystem35.cdPlayer.getPosition(); );
+	info->t = t & 0xff;
+	FRAMES_TO_MSF(t >> 8, &info->m, &info->s, &info->f);
+	return OK;
 }

web/shell/shell.ts

@@ -79,12 +79,14 @@ class System35Shell {
 class CDPlayer {
     audio = <HTMLAudioElement>$('audio');
     private blobs: Blob[];
+    private currentTrack: number;
 
     constructor(private imageLoader:ImageLoader) {
         this.blobs = [];
     }
 
     play(track:number, loop:number) {
+        this.currentTrack = track;
         if (this.blobs[track]) {
             this.startPlayback(this.blobs[track], loop);
             return;
@@ -97,6 +99,14 @@ class CDPlayer {
 
     stop() {
         this.audio.pause();
+        this.currentTrack = null;
+    }
+
+    getPosition(): number {
+        if (!this.currentTrack)
+            return 0;
+        var time = Math.round(this.audio.currentTime * 75);
+        return this.currentTrack | time << 8;
     }
 
     private startPlayback(blob:Blob, loop:number) {