macosx: implement 120% volume limit

This patch doesn't stop you from going above the limit using the hotkeys or the Apple Remote

modules/gui/macosx/ControlsBar.h

@@ -24,6 +24,7 @@
 
 #import <Cocoa/Cocoa.h>
 #import "CompatibilityFixes.h"
+#import "misc.h"
 
 @class VLCFSPanel;
 
@@ -103,7 +104,7 @@
     IBOutlet id o_repeat_btn;
     IBOutlet id o_shuffle_btn;
 
-    IBOutlet id o_volume_sld;
+    IBOutlet VLCVolumeSliderCommon * o_volume_sld;
     IBOutlet id o_volume_track_view;
     IBOutlet id o_volume_down_btn;
     IBOutlet id o_volume_up_btn;

modules/gui/macosx/ControlsBar.m

@@ -483,6 +483,7 @@
         [o_volume_down_btn setImage: [NSImage imageNamed:@"volume-low"]];
         [o_volume_track_view setImage: [NSImage imageNamed:@"volume-slider-track"]];
         [o_volume_up_btn setImage: [NSImage imageNamed:@"volume-high"]];
+        [o_volume_sld setUsesBrightArtwork: YES];
 
         if (b_nativeFullscreenMode) {
             [o_effects_btn setImage: [NSImage imageNamed:@"effects-one-button"]];
@@ -514,6 +515,7 @@
         [o_volume_down_btn setImage: [NSImage imageNamed:@"volume-low_dark"]];
         [o_volume_track_view setImage: [NSImage imageNamed:@"volume-slider-track_dark"]];
         [o_volume_up_btn setImage: [NSImage imageNamed:@"volume-high_dark"]];
+        [o_volume_sld setUsesBrightArtwork: NO];
 
         if (b_nativeFullscreenMode) {
             [o_effects_btn setImage: [NSImage imageNamed:@"effects-one-button_dark"]];
@@ -533,9 +535,9 @@
 
     BOOL b_mute = ![[VLCCoreInteraction sharedInstance] mute];
     [o_volume_sld setEnabled: b_mute];
+    [o_volume_sld setMaxValue: [[VLCCoreInteraction sharedInstance] maxVolume]];
     [o_volume_up_btn setEnabled: b_mute];
 
-
     // remove fullscreen button for lion fullscreen
     if (b_nativeFullscreenMode) {
         NSRect frame;

modules/gui/macosx/CoreInteraction.h

@@ -31,6 +31,7 @@
 }
 + (VLCCoreInteraction *)sharedInstance;
 @property (readwrite) int volume;
+@property (readonly, nonatomic) float maxVolume;
 @property (readwrite) int playbackRate;
 @property (nonatomic, readwrite) BOOL aspectRatioIsLocked;
 @property (readonly) int durationOfCurrentPlaylistItem;

modules/gui/macosx/CoreInteraction.m

@@ -538,6 +538,7 @@ static VLCCoreInteraction *_o_sharedInstance = nil;
         return 0;
 
     float volume = playlist_VolumeGet(pl_Get(p_intf));
+    NSLog(@"return vol %f", volume);
 
     return lroundf(volume * AOUT_VOLUME_DEFAULT);
 }
@@ -548,11 +549,20 @@ static VLCCoreInteraction *_o_sharedInstance = nil;
     if (!p_intf)
         return;
 
+    if (i_value >= self.maxVolume)
+        i_value = self.maxVolume;
+
     float f_value = i_value / (float)AOUT_VOLUME_DEFAULT;
+    NSLog( @"set vol %f", f_value);
 
     playlist_VolumeSet(pl_Get(p_intf), f_value);
 }
 
+- (float)maxVolume
+{
+    return 1.2 * AOUT_VOLUME_DEFAULT;
+}
+
 #pragma mark -
 #pragma mark drag and drop support for VLCVoutView, VLBrushedMetalImageView and VLCThreePartDropView
 - (BOOL)performDragOperation:(id <NSDraggingInfo>)sender

modules/gui/macosx/misc.h

@@ -123,6 +123,7 @@
 @interface VLCVolumeSliderCommon : NSSlider
 {
     BOOL _usesBrightArtwork;
+    CGFloat _maximumVolume;
 }
 @property (readwrite, nonatomic) BOOL usesBrightArtwork;
 

modules/gui/macosx/misc.m

@@ -556,8 +556,13 @@ void _drawFrameInRect(NSRect frameRect)
         drawingColor = [[NSColor blackColor] colorWithAlphaComponent:.6];
 
     NSBezierPath* bezierPath = [NSBezierPath bezierPath];
-
     float fullVolPos = frame.size.width / 2.;
+
+    CGFloat maxAudioVol = self.maxValue / AOUT_VOLUME_DEFAULT;
+
+    if ((maxAudioVol - 1.) > 0)
+        fullVolPos += ((maxAudioVol - 1.) * 2000) / fullVolPos;
+
     [bezierPath moveToPoint:NSMakePoint(fullVolPos, frame.size.height - 3.)];
     [bezierPath lineToPoint:NSMakePoint(fullVolPos, 3.)];
     [bezierPath closePath];