From aae0b0547360bb6aea2fd12d389b5af080248727 Mon Sep 17 00:00:00 2001 From: locpham Date: Tue, 11 Aug 2026 08:39:48 +0700 Subject: [PATCH] =?UTF-8?q?fix:=20media=20explorer=20preview=20MIDI=20file?= =?UTF-8?q?=20t=E1=BB=AB=20Media=20Library=20(name/kind)=20kh=C3=B4ng=20ph?= =?UTF-8?q?=C3=A1t=20=C3=A2m=20=E2=80=94=20resolve=20bytes=20/static/midi?= =?UTF-8?q?=20qua=20filePreviewUrl=20+=20guard=20playSelected/selectSynthI?= =?UTF-8?q?nst/re-loop?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- app/static/js/app.jsx | 11 +++++++---- app/static/js/app.precompiled.js | 12 +++++++----- 2 files changed, 14 insertions(+), 9 deletions(-) diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx index 1d54119..c747fc7 100644 --- a/app/static/js/app.jsx +++ b/app/static/js/app.jsx @@ -14024,6 +14024,9 @@ const MediaExplorerPanel = ({ height, clipboardRef, active }) => { const filePreviewUrl = (f) => { if (f && f.path && !(f.handle && f.handle.getFile)) return `${API_BASE_URL}/api/v1/media/file?path=${encodeURIComponent(f.path)}`; + // Media Library demo MIDI: chỉ có name/kind — bytes ở /static/midi (bản + // resolveMediaExplorerDropFile cũng dùng cùng endpoint). + if (f && f.kind === 'midi' && f.name) return `${API_BASE_URL}/static/midi/${encodeURIComponent(f.name)}`; const fid = f && (f.file_id || f.fileId); return fid ? `${API_BASE_URL}/api/v1/audio/download/${fid}` : null; }; @@ -14057,7 +14060,7 @@ const MediaExplorerPanel = ({ height, clipboardRef, active }) => { localStorage.setItem('studio_media_explorer_synth', JSON.stringify(inst)); // Realtime: re-schedule current MIDI preview with the newly selected instrument const cur = selectedRef.current; - if (isPlayingRef.current && cur && isMidiFile(cur) && (cur.handle || cur.path || cur.file_id || cur.fileId)) { + if (isPlayingRef.current && cur && isMidiFile(cur) && (cur.handle || cur.path || cur.file_id || cur.fileId || (cur.kind === 'midi' && cur.name))) { selectTokenRef.current++; const token = selectTokenRef.current; try { if (window.SonicSF && typeof window.SonicSF.stopAll === 'function') window.SonicSF.stopAll(); } catch (e) {} @@ -14240,7 +14243,7 @@ const MediaExplorerPanel = ({ height, clipboardRef, active }) => { if (!f) return; stopMediaPlayback(); if (isMidiFile(f)) { - if (f.handle || f.path || f.file_id || f.fileId) { + if (f.handle || f.path || f.file_id || f.fileId || (f.kind === 'midi' && f.name)) { // Real MIDI file: play through selected synth instrument await playMidiPreview(f, token); return; @@ -14533,7 +14536,7 @@ const MediaExplorerPanel = ({ height, clipboardRef, active }) => { try { localStorage.setItem('studio_media_explorer_tempo', String(clamped)); } catch (e) {} // Re-schedule a currently playing MIDI preview at the new tempo. const cur = selectedRef.current; - if (isPlayingRef.current && cur && isMidiFile(cur) && (cur.handle || cur.path || cur.file_id || cur.fileId)) { + if (isPlayingRef.current && cur && isMidiFile(cur) && (cur.handle || cur.path || cur.file_id || cur.fileId || (cur.kind === 'midi' && cur.name))) { selectTokenRef.current++; const token = selectTokenRef.current; try { if (window.SonicSF && typeof window.SonicSF.stopAll === 'function') window.SonicSF.stopAll(); } catch (e) {} @@ -14704,7 +14707,7 @@ const MediaExplorerPanel = ({ height, clipboardRef, active }) => { } if (next && isMidiFile(cur)) { // Re-schedule loop for the currently previewing MIDI file - if (cur && (cur.handle || cur.path || cur.file_id || cur.fileId)) { + if (cur && (cur.handle || cur.path || cur.file_id || cur.fileId || (cur.kind === 'midi' && cur.name))) { selectTokenRef.current++; const token = selectTokenRef.current; try { if (window.SonicSF && typeof window.SonicSF.stopAll === 'function') window.SonicSF.stopAll(); } catch (e) {} diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js index 12540bf..ad9516c 100644 --- a/app/static/js/app.precompiled.js +++ b/app/static/js/app.precompiled.js @@ -711,9 +711,11 @@ browseComputerDir({...entry,handle:node.handle});}else if(fav.path&&fav.path.sta let permitted=true;try{if(typeof favHandle.queryPermission==='function'){const st=await favHandle.queryPermission({mode:'read'});if(st!=='granted'&&typeof favHandle.requestPermission==='function'){const r=await favHandle.requestPermission({mode:'read'});permitted=r==='granted';}}}catch(e){permitted=false;}if(permitted){setComputerTree({});// Reset cache setClientRoot(favHandle);setComputerMode('client');const rootEntry={name:favHandle.name,path:'root',is_dir:true,handle:favHandle};setComputerRoots([rootEntry]);setComputerPath('root');setComputerFiles([]);await browseComputerDir(rootEntry);}else{window.showToast&&window.showToast('Không có quyền truy cập thư mục này','warning');}}else{window.showToast&&window.showToast('Không thể khôi phục quyền truy cập thư mục này','error');}})();}else if(fav.path==='root'&&clientRoot){browseComputerDir({name:clientRoot.name,path:'root',is_dir:true,handle:clientRoot});}else if(fav.path&&fav.path.startsWith('root/')&&clientRoot){// Duyệt lại từ root handle tới folder favorite const segments=fav.path.split('/').slice(1);let curHandle=clientRoot;const walk=async idx=>{if(idx>=segments.length){browseComputerDir({name:segments[idx-1]||clientRoot.name,path:fav.path,is_dir:true,handle:curHandle});return;}try{const child=await curHandle.getDirectoryHandle(segments[idx]);curHandle=child;walk(idx+1);}catch(e){window.showToast&&window.showToast('Không mở được thư mục favorite','error');}};walk(0);}else if(fav.path){browseComputerDir(entry);}};const goComputerParent=()=>{if(!computerPath)return;if(computerMode==='client'||clientRoot){const node=computerTree[computerPath];const parentHandle=node&&node.parent;if(parentHandle){const parentEntry=computerRoots&&computerRoots[0]&&parentHandle===clientRoot?computerRoots[0]:{name:parentHandle.name,path:computerPath.split('/').slice(0,-1).join('/')||'root',is_dir:true,handle:parentHandle};browseComputerDir({...parentEntry,parent:parentHandle===clientRoot?null:computerTree[parentEntry.path]?computerTree[parentEntry.path].parent:null});}return;}const isUnix=computerPath.startsWith('/');const parts=computerPath.split(/[\\/]/).filter(Boolean);parts.pop();if(isUnix){browseComputerDir(parts.length?'/'+parts.join('/'):'/');}else{// Windows: quay về root ổ đĩa nếu đã lên tới đỉnh -browseComputerDir(parts.length?parts.join('\\'):computerPath.split(/[\\/]/)[0]+'\\');}};const readLocalFileBuffer=async f=>{if(f&&f.handle&&typeof f.handle.getFile==='function'){const file=await f.handle.getFile();return await file.arrayBuffer();}const url=filePreviewUrl(f);if(!url)return null;const resp=await fetch(url);return await resp.arrayBuffer();};const filePreviewUrl=f=>{if(f&&f.path&&!(f.handle&&f.handle.getFile))return`${API_BASE_URL}/api/v1/media/file?path=${encodeURIComponent(f.path)}`;const fid=f&&(f.file_id||f.fileId);return fid?`${API_BASE_URL}/api/v1/audio/download/${fid}`:null;};const toggleSynthDropdown=()=>{if(synthOpen){setSynthOpen(false);return;}setSynthFilter('');// Clear search filter on open +browseComputerDir(parts.length?parts.join('\\'):computerPath.split(/[\\/]/)[0]+'\\');}};const readLocalFileBuffer=async f=>{if(f&&f.handle&&typeof f.handle.getFile==='function'){const file=await f.handle.getFile();return await file.arrayBuffer();}const url=filePreviewUrl(f);if(!url)return null;const resp=await fetch(url);return await resp.arrayBuffer();};const filePreviewUrl=f=>{if(f&&f.path&&!(f.handle&&f.handle.getFile))return`${API_BASE_URL}/api/v1/media/file?path=${encodeURIComponent(f.path)}`;// Media Library demo MIDI: chỉ có name/kind — bytes ở /static/midi (bản +// resolveMediaExplorerDropFile cũng dùng cùng endpoint). +if(f&&f.kind==='midi'&&f.name)return`${API_BASE_URL}/static/midi/${encodeURIComponent(f.name)}`;const fid=f&&(f.file_id||f.fileId);return fid?`${API_BASE_URL}/api/v1/audio/download/${fid}`:null;};const toggleSynthDropdown=()=>{if(synthOpen){setSynthOpen(false);return;}setSynthFilter('');// Clear search filter on open setSynthOpen(true);if(synthListRef.current)return;setSynthLoading(true);(window.SonicAPI&&window.SonicAPI.listPlugins?window.SonicAPI.listPlugins():Promise.resolve({soundfonts:[]})).then(async data=>{const sfonts=data&&data.soundfonts||[];if(!sfonts.length){setSynthList([]);setSynthLoading(false);return;}const results=await Promise.all(sfonts.map(sf=>{const baseId=String(sf.id||'').replace('sf_','');return(window.SonicAPI.listSoundfontInstruments?window.SonicAPI.listSoundfontInstruments(baseId):Promise.resolve({presets:[]})).then(r=>({sf,presets:r&&r.presets||[]})).catch(()=>({sf,presets:[]}));}));setSynthList(results);setSynthLoading(false);}).catch(()=>{setSynthList([]);setSynthLoading(false);});};const selectSynthInst=inst=>{setSynthInst(inst);synthInstRef.current=inst;setSynthOpen(false);localStorage.setItem('studio_media_explorer_synth',JSON.stringify(inst));// Realtime: re-schedule current MIDI preview with the newly selected instrument -const cur=selectedRef.current;if(isPlayingRef.current&&cur&&isMidiFile(cur)&&(cur.handle||cur.path||cur.file_id||cur.fileId)){selectTokenRef.current++;const token=selectTokenRef.current;try{if(window.SonicSF&&typeof window.SonicSF.stopAll==='function')window.SonicSF.stopAll();}catch(e){}stopAllNativeSfNotes();playMidiPreview(cur,token);}};const filteredSynthList=React.useMemo(()=>{if(!synthList)return[];if(!synthFilter.trim())return synthList;const query=synthFilter.toLowerCase().trim();return synthList.map(group=>{const presets=(group.presets||[]).filter(p=>(p.name||'').toLowerCase().includes(query)||String(p.program).includes(query));return{...group,presets};}).filter(group=>group.presets.length>0);},[synthList,synthFilter]);const playMidiPreview=async(f,token)=>{// Play real MIDI file through selected synth instrument (SonicSF) +const cur=selectedRef.current;if(isPlayingRef.current&&cur&&isMidiFile(cur)&&(cur.handle||cur.path||cur.file_id||cur.fileId||cur.kind==='midi'&&cur.name)){selectTokenRef.current++;const token=selectTokenRef.current;try{if(window.SonicSF&&typeof window.SonicSF.stopAll==='function')window.SonicSF.stopAll();}catch(e){}stopAllNativeSfNotes();playMidiPreview(cur,token);}};const filteredSynthList=React.useMemo(()=>{if(!synthList)return[];if(!synthFilter.trim())return synthList;const query=synthFilter.toLowerCase().trim();return synthList.map(group=>{const presets=(group.presets||[]).filter(p=>(p.name||'').toLowerCase().includes(query)||String(p.program).includes(query));return{...group,presets};}).filter(group=>group.presets.length>0);},[synthList,synthFilter]);const playMidiPreview=async(f,token)=>{// Play real MIDI file through selected synth instrument (SonicSF) if(!f||!window.SonicSF)return;try{const buf=await readLocalFileBuffer(f);if(!buf)return;if(selectTokenRef.current!==(token||selectTokenRef.current))return;const midiResult=(typeof parseMidiFile==='function'?parseMidiFile:window.parseMidiFile)(buf);if(!midiResult||!midiResult.length)return;// Feature: selecting/playing a MIDI file auto-sets the playback tempo to // the file's own BPM (so the preview plays in time). const fileBpm=midiResult[0]&&midiResult[0].bpm||120;const newTempo=Math.max(40,Math.min(300,Math.round(fileBpm)));setTempo(newTempo);setTempoText(String(newTempo));tempoRef.current=newTempo;try{localStorage.setItem('studio_media_explorer_tempo',String(newTempo));}catch(e){}const ctx=getAudioContext();// Đồng bộ mastering + routing SF trước khi preview MIDI file (âm qua @@ -731,7 +733,7 @@ if(isStandaloneSf()&&sfId){const nativeNotes=allNotes.filter(note=>!(hasSelectio if(loopTimerRef.current){clearInterval(loopTimerRef.current);loopTimerRef.current=null;}if(isLoopingRef.current){loopTimerRef.current=setInterval(()=>{if(selectTokenRef.current!==(token||selectTokenRef.current)){clearInterval(loopTimerRef.current);loopTimerRef.current=null;return;}if(!isPlayingRef.current||isPausedRef.current)return;if(!isLoopingRef.current){clearInterval(loopTimerRef.current);loopTimerRef.current=null;return;}const passStart=ctx.currentTime+0.05;schedulePass(passStart);playStateRef.current=Object.assign({},playStateRef.current,{startedAt:passStart,fakeStart:passStart});},Math.max(200,loopDurationSec*1000));}// Keep a fake clock so canvas playhead animates; loop uses playStateRef const startedAtTime=startWallTime-loopStartSec;playStateRef.current={source:null,ctx,startedAt:startedAtTime,fakeStart:startedAtTime,midiTotal:totalSec};setMidiNotes(allNotes);setMidiTotal(totalSec);setMidiBars(midiResult[0].bars||1);setMidiTotalBeats(midiResult[0].totalBeats||16);setMidiFileBpm(midiResult[0].bpm||120);setIsPlaying(true);setIsPaused(false);startCanvasClock();}catch(e){console.error('MIDI preview failed',e);}};const stopMediaPlayback=React.useCallback(()=>{if(playStateRef.current){try{if(playStateRef.current.source)playStateRef.current.source.stop();}catch(e){}try{if(playStateRef.current.source)playStateRef.current.source.disconnect();}catch(e){}playStateRef.current=null;}if(rafRef.current)cancelAnimationFrame(rafRef.current);rafRef.current=null;if(loopTimerRef.current){clearInterval(loopTimerRef.current);loopTimerRef.current=null;}stopNativeSfNote('midifile');if(window.SonicSF&&typeof window.SonicSF.stopAll==='function'){try{window.SonicSF.stopAll();}catch(e){}}setIsPlaying(false);setIsPaused(false);},[]);// F6 close / panel bị ẩn (display:none — KHÔNG unmount) → tắt preview âm // thanh (trước đây preview tiếp tục phát sau khi đóng Media Explorer). -React.useEffect(function(){if(active===false)stopMediaPlayback();},[active,stopMediaPlayback]);const playSelected=async(f,token)=>{if(!f)return;stopMediaPlayback();if(isMidiFile(f)){if(f.handle||f.path||f.file_id||f.fileId){// Real MIDI file: play through selected synth instrument +React.useEffect(function(){if(active===false)stopMediaPlayback();},[active,stopMediaPlayback]);const playSelected=async(f,token)=>{if(!f)return;stopMediaPlayback();if(isMidiFile(f)){if(f.handle||f.path||f.file_id||f.fileId||f.kind==='midi'&&f.name){// Real MIDI file: play through selected synth instrument await playMidiPreview(f,token);return;}playStateRef.current={source:null,ctx:null,fakeStart:performance.now()/1000};setIsPlaying(true);setIsPaused(false);startCanvasClock();return;}const fid=f.file_id||f.fileId;const buf=await readLocalFileBuffer(f);if(selectTokenRef.current!==(token||selectTokenRef.current))return;if(!buf)return;try{const ctx=getAudioContext();const decoded=await ctx.decodeAudioData(buf);if(selectTokenRef.current!==(token||selectTokenRef.current))return;setAudioBuffer(decoded);setAudioDuration(decoded.duration);const src=ctx.createBufferSource();src.buffer=decoded;const sStart=selStartRef.current;const sEnd=selEndRef.current;const hasSelection=sStart!==null&&sEnd!==null&&Math.abs(sStart-sEnd)>0.01;let startOffset=0;if(hasSelection){startOffset=Math.min(sStart,sEnd);}src.loop=isLoopingRef.current;if(isLoopingRef.current){if(hasSelection){src.loopStart=Math.min(sStart,sEnd);src.loopEnd=Math.max(sStart,sEnd);}else{src.loopStart=0;src.loopEnd=decoded.duration;}}src.playbackRate.value=rate;const gain=ctx.createGain();const linear=volumeDb<=-50?0:Math.pow(10,volumeDb/20);gain.gain.value=linear;src.connect(gain);gain.connect(ctx.destination);src.start(0,startOffset);const startedAt=ctx.currentTime-startOffset;playStateRef.current={source:src,ctx,startedAt};setIsPlaying(true);setIsPaused(false);startCanvasClock();}catch(e){console.error('Preview failed',e);}};const togglePause=()=>{const st=playStateRef.current;if(!st)return;if(isPaused){if(st.ctx)st.ctx.resume();setIsPaused(false);}else{if(st.ctx)st.ctx.suspend();setIsPaused(true);}};const startCanvasClock=()=>{if(rafRef.current)cancelAnimationFrame(rafRef.current);const tick=()=>{rafRef.current=requestAnimationFrame(tick);let t=currentTimeRef.current;const st=playStateRef.current;if(st&&!isPausedRef.current){const rawElapsed=st.ctx?st.ctx.currentTime-st.startedAt:performance.now()/1000-st.fakeStart;const f=selectedRef.current;const dur=fileDuration(f);const isMidi=isMidiFile(f);const bpmVal=tempoRef.current||120;const secondsPerBeat=60.0/bpmVal;const sStart=selStartRef.current;const sEnd=selEndRef.current;const hasSelection=sStart!==null&&sEnd!==null&&Math.abs(sStart-sEnd)>0.01;// Loop plays continuously (forever) until Stop is pressed. if(isLoopingRef.current){if(isMidi){const totalBeats=midiTotalBeatsRef.current||16;const loopStartBeats=hasSelection?Math.min(sStart,sEnd):0;const loopEndBeats=hasSelection?Math.max(sStart,sEnd):totalBeats;const loopDurationBeats=loopEndBeats-loopStartBeats;const loopDurationSec=loopDurationBeats*secondsPerBeat;const loopStartSec=loopStartBeats*secondsPerBeat;t=loopStartSec+Math.max(0,(rawElapsed-loopStartSec)%Math.max(0.1,loopDurationSec));}else{const loopStartSec=hasSelection?Math.min(sStart,sEnd):0;const loopEndSec=hasSelection?Math.max(sStart,sEnd):dur;const loopDurationSec=loopEndSec-loopStartSec;t=loopStartSec+Math.max(0,(rawElapsed-loopStartSec)%Math.max(0.1,loopDurationSec));}}else{t=rawElapsed;const endLimit=hasSelection?isMidi?Math.max(sStart,sEnd)*secondsPerBeat:Math.max(sStart,sEnd):dur;if(t>=endLimit){t=endLimit;stopMediaPlayback();}}}setCurrentTime(t);currentTimeRef.current=t;drawCanvas(t);};tick();};const drawCanvas=t=>{const canvas=canvasRef.current;if(!canvas)return;const ctx=canvas.getContext('2d');const w=canvas.clientWidth,h=canvas.clientHeight;if(!w||!h)return;canvas.width=w*2;canvas.height=h*2;ctx.scale(2,2);ctx.clearRect(0,0,w,h);ctx.fillStyle='#181818';ctx.fillRect(0,0,w,h);const f=selectedRef.current;const curPeaks=peaksRef.current;const curAudioBuffer=audioBufferRef.current;const curMidiNotes=midiNotesRef.current;const curMidiTotal=midiTotalRef.current;const curMidiBars=midiBarsRef.current;const curMidiTotalBeats=midiTotalBeatsRef.current;const curTempo=tempoRef.current;const playing=isPlayingRef.current;if(!f){ctx.fillStyle='#555';ctx.font='12px JetBrains Mono, monospace';ctx.fillText('No file selected',10,h/2);return;}const dur=fileDuration(f);// Read selection from refs so rAF-driven redraws always show current selection const drawSelStart=selStartRef.current;const drawSelEnd=selEndRef.current;const drawHasSel=drawSelStart!==null&&drawSelEnd!==null&&Math.abs(drawSelStart-drawSelEnd)>0.01;// Scale layout parameters using zoom @@ -740,7 +742,7 @@ for(let b=0;b<=beats;b+=4){const x=b*pxPerBeat-offset;if(x<-10||x>w+10)continue; if(drawHasSel){const startVal=Math.min(drawSelStart,drawSelEnd);const endVal=Math.max(drawSelStart,drawSelEnd);const xStart=startVal*pxPerBeat-offset;const xEnd=endVal*pxPerBeat-offset;ctx.fillStyle='rgba(59, 130, 246, 0.25)';ctx.fillRect(xStart,0,xEnd-xStart,h-14);ctx.strokeStyle='#3b82f6';ctx.lineWidth=1;ctx.beginPath();ctx.moveTo(xStart,0);ctx.lineTo(xStart,h-14);ctx.moveTo(xEnd,0);ctx.lineTo(xEnd,h-14);ctx.stroke();}const midiPlayheadX=contentW>w?Math.max(0,Math.min(w,t*pxPerSec-offset)):Math.min(w,t*pxPerSec);if(playing&&dur>0){ctx.fillStyle='#ef4444';ctx.fillRect(midiPlayheadX-1,0,2,h-14);}}else{const pk=curPeaks&&curPeaks.length>0?curPeaks:null;if(pk){const contentW=Math.max(1,dur*pxPerSec);const offsetVal=scrollOffsetRef.current;let offset=offsetVal;if(playing&&contentW>w&&dur>0){offset=Math.max(0,Math.min(contentW-w,t*pxPerSec-w/2));}else{offset=Math.max(0,Math.min(contentW-w,offsetVal));}const mid=h/2;ctx.fillStyle='#22c55e';const barW=Math.max(1,contentW/pk.length);for(let i=0;iw+3)continue;const ph=Math.max(2,pk[i]*(h/2-4));ctx.fillRect(x,mid-ph,barW,ph*2);}// Draw selection overlay if(drawHasSel){const startVal=Math.min(drawSelStart,drawSelEnd);const endVal=Math.max(drawSelStart,drawSelEnd);const xStart=startVal*pxPerSec-offset;const xEnd=endVal*pxPerSec-offset;ctx.fillStyle='rgba(59, 130, 246, 0.25)';ctx.fillRect(xStart,0,xEnd-xStart,h-14);ctx.strokeStyle='#3b82f6';ctx.lineWidth=1;ctx.beginPath();ctx.moveTo(xStart,0);ctx.lineTo(xStart,h-14);ctx.moveTo(xEnd,0);ctx.lineTo(xEnd,h-14);ctx.stroke();}const audioPlayheadX=contentW>w?Math.max(0,Math.min(w,t*pxPerSec-offset)):t*pxPerSec;if(playing&&dur>0){ctx.fillStyle='#ef4444';ctx.fillRect(audioPlayheadX-1,0,2,h-14);}}else{ctx.fillStyle='#666';ctx.font='11px monospace';ctx.fillText('Waveform unavailable',10,h/2);}}// ruler ctx.fillStyle='#111';ctx.fillRect(0,h-14,w,14);ctx.fillStyle='#888';ctx.font='9px JetBrains Mono, monospace';const isRealMidi=isMidiFile(f)&&curMidiNotes&&curMidiNotes.length&&curMidiTotalBeats>0;const rulerTotalBeats=isRealMidi?Math.max(curMidiTotalBeats,4):Math.max(4,Math.ceil(dur*(curTempo||120)/60)||16);const rulerContentW=Math.max(1,rulerTotalBeats*pxPerBeat);const rulerOffset=playing&&rulerContentW>w&&dur>0?Math.max(0,Math.min(rulerContentW-w,t*pxPerSec-w/2)):0;for(let b=0;b<=rulerTotalBeats;b+=4){const x=b*pxPerBeat-rulerOffset;if(x<-20||x>w+20)continue;ctx.fillText(String(Math.floor(b/4)),x+2,h-3);}};React.useEffect(()=>{drawCanvas(currentTime);},[peaks,audioBuffer,audioDuration,midiNotes,selected,folder,isPlaying,zoom,selStart,selEnd,scrollOffset]);React.useEffect(()=>()=>{if(rafRef.current)cancelAnimationFrame(rafRef.current);},[]);const commitTempo=v=>{const clamped=Math.max(40,Math.min(300,Math.round(v)||120));setTempo(clamped);setTempoText(String(clamped));tempoRef.current=clamped;try{localStorage.setItem('studio_media_explorer_tempo',String(clamped));}catch(e){}// Re-schedule a currently playing MIDI preview at the new tempo. -const cur=selectedRef.current;if(isPlayingRef.current&&cur&&isMidiFile(cur)&&(cur.handle||cur.path||cur.file_id||cur.fileId)){selectTokenRef.current++;const token=selectTokenRef.current;try{if(window.SonicSF&&typeof window.SonicSF.stopAll==='function')window.SonicSF.stopAll();}catch(e){}stopAllNativeSfNotes();playMidiPreview(cur,token);}};// Center a folder node vertically in the tree pane (feature: file click focuses +const cur=selectedRef.current;if(isPlayingRef.current&&cur&&isMidiFile(cur)&&(cur.handle||cur.path||cur.file_id||cur.fileId||cur.kind==='midi'&&cur.name)){selectTokenRef.current++;const token=selectTokenRef.current;try{if(window.SonicSF&&typeof window.SonicSF.stopAll==='function')window.SonicSF.stopAll();}catch(e){}stopAllNativeSfNotes();playMidiPreview(cur,token);}};// Center a folder node vertically in the tree pane (feature: file click focuses // its parent folder in the middle of the tree). const centerTreeNodeInPane=path=>{setTimeout(()=>{const pane=treePaneRef.current;if(!pane)return;const el=document.querySelector(`[data-tree-path="${path}"]`);if(!el)return;const paneRect=pane.getBoundingClientRect();const 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