Support Guitar Pro 7 track volume (#445)

* Support Guitar Pro 7 track volume

* Fixed C# compile error and rounded the volume value

* Simplified parser code, fixed Grace Beat test, and added new test and testfile for track volume

* Added panning to the import and made a test for it

Author: jordanske

src/importer/GpifParser.ts

@@ -414,6 +414,9 @@ export class GpifParser {
                     case 'Transpose':
                         this.parseTranspose(track, c);
                         break;
+                    case 'RSE':
+                        this.parseRSE(track, c);
+                        break;
                 }
             }
         }
@@ -977,6 +980,40 @@ export class GpifParser {
         }
     }
 
+    private parseRSE(track: Track, node: XmlNode): void {
+        for (let c of node.childNodes) {
+            if (c.nodeType === XmlNodeType.Element) {
+                switch (c.localName) {
+                    case 'ChannelStrip':
+                        this.parseChannelStrip(track, c);
+                        break;
+                }
+            }
+        }
+    }
+
+    private parseChannelStrip(track: Track, node: XmlNode): void {
+        for (let c of node.childNodes) {
+            if (c.nodeType === XmlNodeType.Element) {
+                switch (c.localName) {
+                    case 'Parameters':
+                        this.parseChannelStripParameters(track, c);
+                        break;
+                }
+            }
+        }
+    }
+
+    private parseChannelStripParameters(track: Track, node: XmlNode): void {
+        if (node.firstChild && node.firstChild.value) {
+            let parameters = node.firstChild.value.split(' ');
+            if (parameters.length >= 12) {
+                track.playbackInfo.balance = Math.floor(parseFloat(parameters[11]) * 16);
+                track.playbackInfo.volume = Math.floor(parseFloat(parameters[12]) * 16);
+            }
+        }
+    }
+
     //
     // <MasterBars>...</MasterBars>
     //

test-data/guitarpro7/track-balance.gp

@@ -198,7 +198,7 @@ describe('MidiFileGeneratorTest', () => {
         let info: PlaybackInformation = score.tracks[0].playbackInfo;
         let expectedEvents: FlatMidiEvent[] = [
             // channel init
-            new ControlChangeEvent(0, 0, info.primaryChannel, ControllerType.VolumeCoarse, 120),
+            new ControlChangeEvent(0, 0, info.primaryChannel, ControllerType.VolumeCoarse, 96),
             new ControlChangeEvent(0, 0, info.primaryChannel, ControllerType.PanCoarse, 64),
             new ControlChangeEvent(0, 0, info.primaryChannel, ControllerType.ExpressionControllerCoarse, 127),
             new ControlChangeEvent(0, 0, info.primaryChannel, ControllerType.RegisteredParameterFine, 0),
@@ -207,7 +207,7 @@ describe('MidiFileGeneratorTest', () => {
             new ControlChangeEvent(0, 0, info.primaryChannel, ControllerType.DataEntryCoarse, 16),
             new ProgramChangeEvent(0, 0, info.primaryChannel, info.program),
 
-            new ControlChangeEvent(0, 0, info.secondaryChannel, ControllerType.VolumeCoarse, 120),
+            new ControlChangeEvent(0, 0, info.secondaryChannel, ControllerType.VolumeCoarse, 96),
             new ControlChangeEvent(0, 0, info.secondaryChannel, ControllerType.PanCoarse, 64),
             new ControlChangeEvent(0, 0, info.secondaryChannel, ControllerType.ExpressionControllerCoarse, 127),
             new ControlChangeEvent(0, 0, info.secondaryChannel, ControllerType.RegisteredParameterFine, 0),

test-data/guitarpro7/track-volume.gp

@@ -870,4 +870,27 @@ describe('Gp7ImporterTest', () => {
         expect(score.tracks[0].staves[0].bars[1].voices[0].beats[3].lyrics).toBe(null);
     });
 
+    it('track-volume', async () => {
+        const reader = await prepareGp7ImporterWithFile('guitarpro7/track-volume.gp');
+        let score: Score = reader.readScore();
+
+        expect(score.tracks[0].playbackInfo.volume).toBe(16);
+        expect(score.tracks[1].playbackInfo.volume).toBe(14);
+        expect(score.tracks[2].playbackInfo.volume).toBe(12);
+        expect(score.tracks[3].playbackInfo.volume).toBe(10);
+        expect(score.tracks[4].playbackInfo.volume).toBe(7);
+        expect(score.tracks[5].playbackInfo.volume).toBe(3);
+        expect(score.tracks[6].playbackInfo.volume).toBe(0);
+    });
+
+    it('track-balance', async () => {
+        const reader = await prepareGp7ImporterWithFile('guitarpro7/track-balance.gp');
+        let score: Score = reader.readScore();
+
+        expect(score.tracks[0].playbackInfo.balance).toBe(0);
+        expect(score.tracks[1].playbackInfo.balance).toBe(4);
+        expect(score.tracks[2].playbackInfo.balance).toBe(8);
+        expect(score.tracks[3].playbackInfo.balance).toBe(12);
+        expect(score.tracks[4].playbackInfo.balance).toBe(16);
+    });
 });