feat: add draggable waveform loop points

Author: tucktuckg00se

CHANGELOG.md

@@ -14,11 +14,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 ### Changed
 - Gain control moved from the Playback module to the Amp module in the signal chain
 - Renamed internal code to match UI labels: "Time/Pitch" and "Playback" modules, "Settings" button
+- Loop points now use dedicated waveform handles
 
 ### Fixed
 - Header action buttons now use theme-coloured outlines, and OFF states in light themes are easier to read
 - Bungee algorithm no longer produces loud static when Grain is set to Smooth
 - Fade overlay now updates immediately when changing global crossfade, loop mode, or reverse settings
+- Loop fade cursors now appear on the first loop or ping-pong seam, and saved projects once again restore their linked sample path correctly
 
 ## [0.11.0] - 2026-03-31
 ### Added

src/PluginEditor.cpp

@@ -9,7 +9,7 @@ static constexpr float kSliceLaneH = 20.0f;
 static constexpr float kScrollbarH = 10.0f;
 static constexpr float kActionH    = 22.0f;
 static constexpr float kWaveformMinH = 180.0f;
-static constexpr float kCollapsedSignalChainH = 94.0f;
+static constexpr float kCollapsedSignalChainH = 114.0f;
 
 static juce::File getSettingsDir()
 {

src/PluginProcessor.cpp

@@ -123,6 +123,8 @@ class IntersectProcessor : public juce::AudioProcessor
         FieldFilterEnvAmount,
         FieldFilterAsym,
         FieldCrossfade,
+        FieldLoopStart,
+        FieldLoopLength,
     };
 
     enum class MidiEditAction

src/PluginProcessor.h

@@ -39,7 +39,9 @@ enum LockBit : uint64_t
     kLockFilterEnvAmount  = 0x80000000u,
     kLockFilterAsym       = 0x100000000ull,
     kLockCrossfade        = 0x200000000ull,
-    kLockRepitchMode      = 0x400000000ull
+    kLockRepitchMode      = 0x400000000ull,
+    kLockLoopStart        = 0x800000000ull,
+    kLockLoopLength       = 0x1000000000ull
 };
 
 inline int getMaxCrossfadeLengthSamples (int sliceLen, bool /*pingPong*/)
@@ -121,6 +123,8 @@ struct Slice
     float    filterEnvReleaseSec = 0.0f;
     float    filterEnvAmount     = 0.0f; // semitones bipolar
     float    crossfadePct       = 0.0f; // 0-100, percentage of the mode-dependent fade range
+    int      loopStartOffset   = 0;    // samples from slice start (0 = slice start)
+    int      loopLength        = 0;    // samples (0 = full slice length)
     uint64_t lockMask      = 0;
     juce::Colour colour    { 0.4f, 0.7f, 0.95f, 1.0f };
 };

src/audio/Slice.h

@@ -31,6 +31,9 @@ struct Voice
     bool         pingPong     = false;
     int          muteGroup    = 1;  // default matches slice creation default; always overwritten in startVoice()
     bool         looping      = false;
+    int          loopStartSample = 0;
+    int          loopEndSample   = 0;
+    bool         inLoopRegion    = false;
     float        volume       = 1.0f;
     bool         releaseTail  = false;
     bool         oneShot      = false;