iOS: stronger haptics, obey strength setting

fixes #15625

Author: warmenhoven

input/drivers/cocoa_input.m

@@ -29,6 +29,7 @@
 
 #include "../../retroarch.h"
 #include "../../driver.h"
+#include "../../configuration.h"
 
 #include "../drivers_keyboard/keyboard_event_apple.h"
 #include "../../ui/drivers/cocoa/cocoa_common.h"
@@ -41,6 +42,9 @@
 #ifdef HAVE_MFI
 #import <GameController/GameController.h>
 #endif
+#if TARGET_OS_IOS
+#import <CoreHaptics/CoreHaptics.h>
+#endif
 
 #if TARGET_OS_IPHONE
 #define HIDKEY(X) X
@@ -72,6 +76,10 @@
 static bool small_keyboard_active = false;
 static icade_map_t icade_maps[MAX_ICADE_PROFILES][MAX_ICADE_KEYS];
 #if TARGET_OS_IOS
+#define KEYPRESS_HAPTIC_AVAIL API_AVAILABLE(ios(14.0))
+static CHHapticEngine *keypressHapticEngine KEYPRESS_HAPTIC_AVAIL;
+static id<CHHapticPatternPlayer> keypressHapticPlayer KEYPRESS_HAPTIC_AVAIL;
+/* Fallback for iOS 10-13 */
 static UISelectionFeedbackGenerator *feedbackGenerator;
 #endif
 #endif
@@ -379,9 +387,39 @@ void apple_input_keyboard_event(bool down,
 #endif
 
 #if TARGET_OS_IOS
-   if (!feedbackGenerator)
-      feedbackGenerator = [[UISelectionFeedbackGenerator alloc] init];
-   [feedbackGenerator prepare];
+   if (@available(iOS 14, *))
+   {
+      if (!keypressHapticEngine && CHHapticEngine.capabilitiesForHardware.supportsHaptics)
+      {
+         NSError *error;
+         keypressHapticEngine = [[CHHapticEngine alloc] initAndReturnError:&error];
+         if (!error)
+         {
+            [keypressHapticEngine startAndReturnError:&error];
+            if (!error)
+            {
+               keypressHapticEngine.stoppedHandler = ^(CHHapticEngineStoppedReason reason) {
+                  keypressHapticPlayer = nil;
+                  keypressHapticEngine = nil;
+               };
+               keypressHapticEngine.resetHandler = ^{
+                  if (keypressHapticEngine)
+                     [keypressHapticEngine startAndReturnError:nil];
+               };
+            }
+         }
+      }
+   }
+   else
+   {
+      /* Fallback for iOS 10-13 */
+      if (@available(iOS 10, *))
+      {
+         if (!feedbackGenerator)
+            feedbackGenerator = [[UISelectionFeedbackGenerator alloc] init];
+         [feedbackGenerator prepare];
+      }
+   }
 #endif
 
    /* TODO/FIXME - shouldn't we free the above in case this fails for
@@ -861,8 +899,70 @@ static float cocoa_input_get_sensor_input(void *data, unsigned port, unsigned id
 #if TARGET_OS_IOS
 static void cocoa_input_keypress_vibrate(void)
 {
-   [feedbackGenerator selectionChanged];
-   [feedbackGenerator prepare];
+   if (@available(iOS 14, *))
+   {
+      settings_t *settings = config_get_ptr();
+      if (!settings || !keypressHapticEngine)
+         return;
+
+      NSError *error;
+      unsigned rumble_gain = settings->uints.input_rumble_gain;
+      float intensity = (float)rumble_gain / 100.0f;
+
+      /* Create player on first use */
+      if (!keypressHapticPlayer)
+      {
+         CHHapticEventParameter *intense;
+         CHHapticEventParameter *sharp;
+         CHHapticEvent *event;
+         CHHapticPattern *pattern;
+
+         intense = [[CHHapticEventParameter alloc]
+                    initWithParameterID:CHHapticEventParameterIDHapticIntensity
+                    value:intensity];
+         sharp   = [[CHHapticEventParameter alloc]
+                    initWithParameterID:CHHapticEventParameterIDHapticSharpness
+                    value:1.0];
+         event   = [[CHHapticEvent alloc]
+                  initWithEventType:CHHapticEventTypeHapticTransient
+                  parameters:[NSArray arrayWithObjects:intense, sharp, nil]
+                  relativeTime:0];
+         pattern = [[CHHapticPattern alloc]
+                    initWithEvents:[NSArray arrayWithObject:event]
+                    parameters:[[NSArray alloc] init]
+                    error:&error];
+
+         if (error)
+            return;
+
+         keypressHapticPlayer = [keypressHapticEngine createPlayerWithPattern:pattern error:&error];
+         if (error)
+            return;
+      }
+      else
+      {
+         /* Update intensity for existing player */
+         CHHapticDynamicParameter *param = [[CHHapticDynamicParameter alloc]
+            initWithParameterID:CHHapticDynamicParameterIDHapticIntensityControl
+                          value:intensity
+                   relativeTime:0];
+         [keypressHapticPlayer sendParameters:[NSArray arrayWithObject:param] atTime:0 error:&error];
+      }
+
+      [keypressHapticPlayer startAtTime:0 error:&error];
+   }
+   else
+   {
+      /* Fallback for iOS 10-13 */
+      if (@available(iOS 10, *))
+      {
+         if (feedbackGenerator)
+         {
+            [feedbackGenerator selectionChanged];
+            [feedbackGenerator prepare];
+         }
+      }
+   }
 }
 #endif
 

input/drivers_joypad/mfi_joypad.m

@@ -50,7 +50,7 @@
 static int16_t  mfi_axes[MAX_USERS][MAX_MFI_AXES];
 static uint32_t mfi_controllers[MAX_MFI_CONTROLLERS];
 static MFIRumbleController *mfi_rumblers[MAX_MFI_CONTROLLERS];
-#define MFI_WEAK_RUMBLE 0.3f
+#define MFI_WEAK_RUMBLE 0.5f
 static NSMutableArray *mfiControllers;
 static bool mfi_inited;
 
@@ -372,12 +372,17 @@ - (instancetype)initWithController:(GCController*)controller MFI_RUMBLE_AVAIL
     CHHapticEvent *event;
     CHHapticPattern *pattern;
 
+    CHHapticEventParameter *sharp;
+
     intense = [[CHHapticEventParameter alloc]
                initWithParameterID:CHHapticEventParameterIDHapticIntensity
                value:intensity];
+    sharp   = [[CHHapticEventParameter alloc]
+               initWithParameterID:CHHapticEventParameterIDHapticSharpness
+               value:1.0];
     event   = [[CHHapticEvent alloc]
              initWithEventType:CHHapticEventTypeHapticContinuous
-             parameters:[NSArray arrayWithObjects:intense, nil]
+             parameters:[NSArray arrayWithObjects:intense, sharp, nil]
              relativeTime:0
              duration:GCHapticDurationInfinite];
     pattern = [[CHHapticPattern alloc]
@@ -573,12 +578,17 @@ static void apple_gamecontroller_device_haptics_setup(void) IPHONE_RUMBLE_AVAIL
     CHHapticPattern *pattern;
     NSError *error;
 
+    CHHapticEventParameter *sharp;
+
     intense = [[CHHapticEventParameter alloc]
                initWithParameterID:CHHapticEventParameterIDHapticIntensity
                value:intensity];
+    sharp   = [[CHHapticEventParameter alloc]
+               initWithParameterID:CHHapticEventParameterIDHapticSharpness
+               value:1.0];
     event   = [[CHHapticEvent alloc]
                initWithEventType:CHHapticEventTypeHapticContinuous
-               parameters:[NSArray arrayWithObjects:intense, nil]
+               parameters:[NSArray arrayWithObjects:intense, sharp, nil]
                relativeTime:0
                duration:GCHapticDurationInfinite];
     pattern = [[CHHapticPattern alloc]
@@ -606,7 +616,7 @@ static void apple_gamecontroller_device_haptics_setup(void) IPHONE_RUMBLE_AVAIL
 static id<CHHapticPatternPlayer> apple_gamecontroller_device_haptics_weak_player(void) IPHONE_RUMBLE_AVAIL
 {
     if (!deviceWeakPlayer)
-        deviceWeakPlayer = apple_gamecontroller_device_haptics_create_player(0.5f);
+        deviceWeakPlayer = apple_gamecontroller_device_haptics_create_player(0.7f);
     return deviceWeakPlayer;
 }
 #endif
@@ -770,8 +780,6 @@ static bool apple_gamecontroller_joypad_set_rumble(unsigned pad,
                 {
                    CHHapticDynamicParameter *param = NULL;
                    float str = (float)strength / 65535.0f;
-                   if (type == RETRO_RUMBLE_WEAK)
-                      str *= MFI_WEAK_RUMBLE;
                    param = [[CHHapticDynamicParameter alloc]
                       initWithParameterID:CHHapticDynamicParameterIDHapticIntensityControl
                                     value:str