Fix VTV: auto-play VTV6, single-source fast fail (4s), no duplicate function

static/app_v2.js

@@ -119,6 +119,11 @@ async function loadVTVStreams(){
   });
   
   hideLoader();
+  
+  // Auto-play VTV6 on first load (default channel)
+  if(!_vtvCurrentCh){
+    _vtvPlay('vtv6');
+  }
 }
 
 function _vtvRetry(){
@@ -140,7 +145,7 @@ function _vtvPlay(chId){
   errEl.style.display = 'none';
   loadEl.style.display = 'flex';
   loadEl.innerHTML = '<div class="vtv-spinner"></div>Đang kết nối ' + ch.name + '...';
-  if(_vtvHls){ _vtvHls.destroy(); _vtvHls = null; }
+  if(_vtvHls){ try{_vtvHls.destroy();}catch(e){} _vtvHls = null; }
   const urls = _vtvStreams[chId] || [];
   if(urls.length === 0){
     loadEl.style.display = 'none';
@@ -150,55 +155,70 @@ function _vtvPlay(chId){
   }
   const epgWrap = document.getElementById('vtv-epg-wrap');
   if(epgWrap) epgWrap.innerHTML = buildVTVEPG(chId);
-  _vtvTryPlay(video, urls, 0, ch.name, loadEl, errEl, errMsg);
+  // Single source strategy: load primary, fail fast 4s, then try next
+  _vtvLoadOne(video, urls, 0, ch.name, loadEl, errEl, errMsg);
 }
 
-function _vtvTryPlay(video, urls, idx, name, loadEl, errEl, errMsg){
+function _vtvLoadOne(video, urls, idx, name, loadEl, errEl, errMsg){
   if(idx >= urls.length){
     loadEl.style.display = 'none';
     errEl.style.display = 'flex';
-    errMsg.textContent = name + ': Tất cả nguồn đều lỗi. Thử lại sau.';
+    errMsg.textContent = name + ': Tất cả nguồn đều lỗi.';
     return;
   }
   const src = urls[idx];
-  loadEl.innerHTML = '<div class="vtv-spinner"></div>Đang kết nối ' + name + ' (' + (idx+1) + '/' + urls.length + ')...';
+  loadEl.innerHTML = '<div class="vtv-spinner"></div>' + name + (urls.length > 1 ? ' (' + (idx+1) + '/' + urls.length + ')' : '') + '...';
+  
+  let failTimer = null;
+  let hlsInst = null;
+  let done = false;
+  
+  const next = () => {
+    if(done) return;
+    done = true;
+    if(failTimer) clearTimeout(failTimer);
+    if(hlsInst){ try{hlsInst.destroy();}catch(e){} }
+    if(_vtvHls === hlsInst) _vtvHls = null;
+    if(idx + 1 < urls.length){
+      _vtvLoadOne(video, urls, idx+1, name, loadEl, errEl, errMsg);
+    } else {
+      loadEl.style.display = 'none';
+      errEl.style.display = 'flex';
+      errMsg.textContent = name + ': Tất cả nguồn đều lỗi.';
+    }
+  };
+  
+  const ok = () => {
+    if(done) return;
+    done = true;
+    if(failTimer) clearTimeout(failTimer);
+    _vtvHls = hlsInst;
+    video.play().catch(()=>{});
+    loadEl.style.display='none';
+    video.style.display='block';
+  };
+  
+  // Fast fail: 4s per source
+  failTimer = setTimeout(next, 4000);
+  
   if(typeof Hls !== 'undefined' && Hls.isSupported()){
-    const hls = new Hls({enableWorker:true,lowLatencyMode:true,startLevel:-1,capLevelToPlayerSize:true,maxBufferLength:8,maxMaxBufferLength:15,maxFragLookUpTolerance:0.5});
-    _vtvHls = hls;
-    
-    // Timeout: if not loaded in 8s, try next source
-    const loadTimeout = setTimeout(() => {
-      if(_vtvHls === hls) {
-        console.warn(`VTV ${name} source ${idx+1} timeout, trying next...`);
-        hls.destroy();
-        _vtvHls = null;
-        _vtvTryPlay(video, urls, idx+1, name, loadEl, errEl, errMsg);
-      }
-    }, 8000);
-    
+    const hls = new Hls({
+      enableWorker:true, lowLatencyMode:true, startLevel:-1,
+      capLevelToPlayerSize:true, maxBufferLength:3, maxMaxBufferLength:6
+    });
+    hlsInst = hls;
     hls.loadSource(src);
     hls.attachMedia(video);
-    hls.on(Hls.Events.MANIFEST_PARSED, () => {
-      clearTimeout(loadTimeout);
-      video.play().catch(()=>{});
-      loadEl.style.display='none';
-      video.style.display='block';
-    });
-    hls.on(Hls.Events.ERROR, (ev, data) => {
-      if(data.fatal){
-        clearTimeout(loadTimeout);
-        // For any fatal error, try next source immediately
-        hls.destroy();
-        _vtvHls = null;
-        _vtvTryPlay(video, urls, idx+1, name, loadEl, errEl, errMsg);
-      }
-    });
+    hls.on(Hls.Events.MANIFEST_PARSED, ok);
+    hls.on(Hls.Events.ERROR, (ev, data) => { if(data.fatal) next(); });
   } else if(video.canPlayType('application/vnd.apple.mpegurl')){
     video.src = src;
-    video.addEventListener('loadedmetadata', () => { video.play().catch(()=>{}); loadEl.style.display='none'; video.style.display='block'; }, {once:true});
-    video.addEventListener('error', () => { _vtvTryPlay(video, urls, idx+1, name, loadEl, errEl, errMsg); }, {once:true});
+    video.addEventListener('loadedmetadata', ok, {once:true});
+    video.addEventListener('error', next, {once:true});
   } else {
-    loadEl.style.display = 'none'; errEl.style.display = 'flex'; errMsg.textContent = 'Trình duyệt không hỗ trợ HLS';
+    clearTimeout(failTimer);
+    loadEl.style.display = 'none'; errEl.style.display = 'flex';
+    errMsg.textContent = 'Trình duyệt không hỗ trợ HLS';
   }
 }