fix: copilot Multi-tool Calling)

app/static/js/app.jsx

@@ -7729,6 +7729,115 @@ const App = () => {
           return { ...t, markers: [...(t.markers || []), { id: 'ai_marker_' + Date.now(), time, label: args.label || 'AI Marker' }] };
         }));
         return { success: true, trackId, time };
+      },
+      fadeIn: (args) => {
+        const trackIdRaw = args.track_id || selectedTrackId;
+        const track = tracks.find(t => t.id === String(trackIdRaw) || t.id === 'track_' + trackIdRaw);
+        if (!track) return { success: false, error: `Track ${trackIdRaw} not found` };
+        const clips = track.clips && track.clips.length > 0 ? track.clips : (track.buffer ? [{ id: 'default_' + track.id, buffer: track.buffer, startTime: track.startTime || 0, name: track.name }] : []);
+        if (clips.length === 0) return { success: false, error: 'No clips on track' };
+        let clip = null;
+        if (args.clip_id) {
+          clip = clips.find(c => c.id === args.clip_id);
+        } else if (args.clip_index !== undefined) {
+          const idx = parseInt(args.clip_index);
+          const realIdx = idx > 0 ? idx - 1 : 0;
+          clip = clips[realIdx] || clips[0];
+        } else {
+          clip = clips[0];
+        }
+        if (!clip || !clip.buffer) return { success: false, error: 'Clip has no audio buffer' };
+        const duration = parseFloat(args.duration_seconds || 3);
+        const buffer = clip.buffer;
+        const sr = buffer.sampleRate;
+        const numChannels = buffer.numberOfChannels;
+        const length = buffer.length;
+        const ctx = getAudioContext();
+        const newBuffer = ctx.createBuffer(numChannels, length, sr);
+        for (let c = 0; c < numChannels; c++) {
+          newBuffer.getChannelData(c).set(buffer.getChannelData(c));
+        }
+        const fadeSamples = Math.min(length, Math.floor(duration * sr));
+        for (let c = 0; c < numChannels; c++) {
+          const data = newBuffer.getChannelData(c);
+          for (let i = 0; i < fadeSamples; i++) {
+            const factor = (1 - Math.cos(Math.PI * i / fadeSamples)) / 2;
+            data[i] *= factor;
+          }
+        }
+        const beforeSnap = captureTrackSnapshot(track.id);
+        setTracks(prev => prev.map(t => {
+          if (t.id !== track.id) return t;
+          const existingClips = t.clips && t.clips.length > 0 ? t.clips : (t.buffer ? [{ id: 'default_' + t.id, buffer: t.buffer, startTime: t.startTime || 0, name: t.name }] : []);
+          const updatedClips = existingClips.map(c => {
+            if (c.id === clip.id || (clip.id.startsWith('default_') && c.id === 'default')) {
+              return { ...c, buffer: newBuffer };
+            }
+            return c;
+          });
+          const mainBuffer = updatedClips[0]?.buffer || t.buffer;
+          return { ...t, clips: updatedClips, buffer: mainBuffer };
+        }));
+        setTimeout(() => {
+          const afterSnap = captureTrackSnapshot(track.id);
+          pushAction('AI_FADE_IN', track.id, beforeSnap, afterSnap);
+        }, 50);
+        return { success: true, trackId: track.id, clipId: clip.id, duration_seconds: duration };
+      },
+      fadeOut: (args) => {
+        const trackIdRaw = args.track_id || selectedTrackId;
+        const track = tracks.find(t => t.id === String(trackIdRaw) || t.id === 'track_' + trackIdRaw);
+        if (!track) return { success: false, error: `Track ${trackIdRaw} not found` };
+        const clips = track.clips && track.clips.length > 0 ? track.clips : (track.buffer ? [{ id: 'default_' + track.id, buffer: track.buffer, startTime: track.startTime || 0, name: track.name }] : []);
+        if (clips.length === 0) return { success: false, error: 'No clips on track' };
+        let clip = null;
+        if (args.clip_id) {
+          clip = clips.find(c => c.id === args.clip_id);
+        } else if (args.clip_index !== undefined) {
+          const idx = parseInt(args.clip_index);
+          const realIdx = idx > 0 ? idx - 1 : 0;
+          clip = clips[realIdx] || clips[0];
+        } else {
+          clip = clips[0];
+        }
+        if (!clip || !clip.buffer) return { success: false, error: 'Clip has no audio buffer' };
+        const duration = parseFloat(args.duration_seconds || 3);
+        const buffer = clip.buffer;
+        const sr = buffer.sampleRate;
+        const numChannels = buffer.numberOfChannels;
+        const length = buffer.length;
+        const ctx = getAudioContext();
+        const newBuffer = ctx.createBuffer(numChannels, length, sr);
+        for (let c = 0; c < numChannels; c++) {
+          newBuffer.getChannelData(c).set(buffer.getChannelData(c));
+        }
+        const fadeSamples = Math.min(length, Math.floor(duration * sr));
+        for (let c = 0; c < numChannels; c++) {
+          const data = newBuffer.getChannelData(c);
+          for (let i = 0; i < fadeSamples; i++) {
+            const idx = length - fadeSamples + i;
+            const factor = (1 + Math.cos(Math.PI * i / fadeSamples)) / 2;
+            data[idx] *= factor;
+          }
+        }
+        const beforeSnap = captureTrackSnapshot(track.id);
+        setTracks(prev => prev.map(t => {
+          if (t.id !== track.id) return t;
+          const existingClips = t.clips && t.clips.length > 0 ? t.clips : (t.buffer ? [{ id: 'default_' + t.id, buffer: t.buffer, startTime: t.startTime || 0, name: t.name }] : []);
+          const updatedClips = existingClips.map(c => {
+            if (c.id === clip.id || (clip.id.startsWith('default_') && c.id === 'default')) {
+              return { ...c, buffer: newBuffer };
+            }
+            return c;
+          });
+          const mainBuffer = updatedClips[0]?.buffer || t.buffer;
+          return { ...t, clips: updatedClips, buffer: mainBuffer };
+        }));
+        setTimeout(() => {
+          const afterSnap = captureTrackSnapshot(track.id);
+          pushAction('AI_FADE_OUT', track.id, beforeSnap, afterSnap);
+        }, 50);
+        return { success: true, trackId: track.id, clipId: clip.id, duration_seconds: duration };
       }
     };
     window.DAWCommandDispatcher.registerDAWCommands(api);