Add configurable auto-pause delays for YouTube video compatibility

BGMApp/BGMApp/BGMAppDelegate.mm

@@ -177,7 +177,8 @@ - (void) continueLaunchAfterInputDevicePermissionGranted {
                                                     userDefaults:userDefaults];
 
     autoPauseMusic = [[BGMAutoPauseMusic alloc] initWithAudioDevices:audioDevices
-                                                        musicPlayers:musicPlayers];
+                                                        musicPlayers:musicPlayers
+                                                        userDefaults:userDefaults];
 
     [self setUpMainMenu];
 
@@ -317,7 +318,8 @@ - (void) setUpMainMenu {
                                                musicPlayers:musicPlayers
                                               statusBarItem:statusBarItem
                                                  aboutPanel:self.aboutPanel
-                                      aboutPanelLicenseView:self.aboutPanelLicenseView];
+                                      aboutPanelLicenseView:self.aboutPanelLicenseView
+                                               userDefaults:userDefaults];
 
     // Enable/disable debug logging. Hidden unless you option-click the status bar icon.
     debugLoggingMenuItem =

BGMApp/BGMApp/BGMAutoPauseMusic.h

@@ -26,6 +26,7 @@
 // Local Includes
 #import "BGMAudioDeviceManager.h"
 #import "BGMMusicPlayers.h"
+#import "BGMUserDefaults.h"
 
 // System Includes
 #import <Foundation/Foundation.h>
@@ -35,7 +36,7 @@
 
 @interface BGMAutoPauseMusic : NSObject
 
-- (id) initWithAudioDevices:(BGMAudioDeviceManager*)inAudioDevices musicPlayers:(BGMMusicPlayers*)inMusicPlayers;
+- (id) initWithAudioDevices:(BGMAudioDeviceManager*)inAudioDevices musicPlayers:(BGMMusicPlayers*)inMusicPlayers userDefaults:(BGMUserDefaults*)inUserDefaults;
 
 - (void) enable;
 - (void) disable;

BGMApp/BGMApp/BGMAutoPauseMusic.mm

@@ -35,23 +35,6 @@
 #include <mach/mach_time.h>
 
 
-// How long to wait before pausing/unpausing. This is so short sounds can play without awkwardly causing a short period of silence,
-// and other audio can have short periods of silence without causing music to play and quickly pause again. Of course, it's a
-// trade-off against how long the music will overlap the other audio before it gets paused and how long the music will stay paused
-// after a sound that was only slightly longer than the pause delay.
-static UInt64 const kPauseDelayNSec = 1500 * NSEC_PER_MSEC;
-// The delay before unpausing the music player is proportional to how long we paused it for, bounded by these limits. This makes it
-// a bit less annoying when a sound is just long enough to cause an auto-pause.
-//
-// I haven't spent much time experimenting with different values for these constants, so they could probably be improved a fair
-// bit.
-//
-// TODO: Would it be worth listening for kAudioDeviceCustomPropertyDeviceIsRunningSomewhereOtherThanBGMApp so we can unpause
-//       immediately if we haven't been paused for long and the non-music-player client stops IO? That would usually indicate that
-//       it doesn't intend to start playing audio again soon. We'd also have to deal with music players that don't stop IO when
-//       they're paused.
-static UInt64 const kMaxUnpauseDelayNSec = 3500 * NSEC_PER_MSEC;
-static UInt64 const kMinUnpauseDelayNSec = kMaxUnpauseDelayNSec / 10;
 // We multiply the time spent paused by this factor to calculate the delay before we consider unpausing.
 static Float32 const kUnpauseDelayWeightingFactor = 0.1f;
 
@@ -60,6 +43,7 @@ @implementation BGMAutoPauseMusic {
 
     BGMAudioDeviceManager* audioDevices;
     BGMMusicPlayers* musicPlayers;
+    BGMUserDefaults* userDefaults;
 
     dispatch_queue_t listenerQueue;
     // Have to keep track of the listener block we add so we can remove it later.
@@ -76,10 +60,11 @@ @implementation BGMAutoPauseMusic {
     UInt64 wentAudible;
 }
 
-- (id) initWithAudioDevices:(BGMAudioDeviceManager*)inAudioDevices musicPlayers:(BGMMusicPlayers*)inMusicPlayers {
+- (id) initWithAudioDevices:(BGMAudioDeviceManager*)inAudioDevices musicPlayers:(BGMMusicPlayers*)inMusicPlayers userDefaults:(BGMUserDefaults*)inUserDefaults {
     if ((self = [super init])) {
         audioDevices = inAudioDevices;
         musicPlayers = inMusicPlayers;
+        userDefaults = inUserDefaults;
 
         enabled = NO;
         wePaused = NO;
@@ -135,6 +120,7 @@ - (void) initListenerBlock {
                 } else if (audibleState == kBGMDeviceIsSilentExceptMusic) {
                     // If we pause the music player and then the user unpauses it before the other audio stops, we need to set
                     // wePaused to false at some point before the other audio starts again so we know we should pause
+                    DebugMsg("BGMAutoPauseMusic: Device is silent except music, resetting wePaused flag");
                     wePaused = NO;
                 }
                 // TODO: Add a fourth audible state, something like "AudibleAndMusicPlaying", and check it here to
@@ -153,8 +139,23 @@ - (void) queuePauseBlock {
     wentAudible = now;
     UInt64 startedPauseDelay = now;
 
+    UInt64 pauseDelayMS = userDefaults.pauseDelayMS;
+
+    // If pause delay is 0, pause immediately (no delay)
+    if (pauseDelayMS == 0) {
+        DebugMsg("BGMAutoPauseMusic::queuePauseBlock: Pause delay is 0, pausing immediately");
+
+        // Pause immediately if device is audible and we haven't already paused
+        if (!wePaused && ([self deviceAudibleState] == kBGMDeviceIsAudible)) {
+            wePaused = ([musicPlayers.selectedMusicPlayer pause] || wePaused);
+        }
+        return;
+    }
+
+    UInt64 pauseDelayNSec = pauseDelayMS * NSEC_PER_MSEC;
+
     DebugMsg("BGMAutoPauseMusic::queuePauseBlock: Dispatching pause block at %llu", now);
-    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, kPauseDelayNSec),
+    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, pauseDelayNSec),
                    pauseUnpauseMusicQueue,
                    ^{
                        BOOL stillAudible = ([self deviceAudibleState] == kBGMDeviceIsAudible);
@@ -178,6 +179,27 @@ - (void) queueUnpauseBlock {
     wentSilent = now;
     UInt64 startedUnpauseDelay = now;
 
+    // Get user-configurable max delay
+    UInt64 maxUnpauseDelayMS = userDefaults.maxUnpauseDelayMS;
+
+    // If max unpause delay is 0, unpause immediately (no delay)
+    if (maxUnpauseDelayMS == 0) {
+        DebugMsg("BGMAutoPauseMusic::queueUnpauseBlock: Max unpause delay is 0, unpausing immediately");
+
+        // Unpause immediately if we were the one who paused and device is still silent
+        BGMDeviceAudibleState currentState = [self deviceAudibleState];
+        DebugMsg("BGMAutoPauseMusic::queueUnpauseBlock: Immediate unpause - wePaused=%s, currentState=%s", 
+                 wePaused ? "YES" : "NO", 
+                 currentState == kBGMDeviceIsSilent ? "Silent" : 
+                 (currentState == kBGMDeviceIsAudible ? "Audible" : "SilentExceptMusic"));
+
+        if (wePaused && (currentState == kBGMDeviceIsSilent)) {
+            wePaused = NO;
+            [musicPlayers.selectedMusicPlayer unpause];
+        }
+        return;
+    }
+
     // Unpause sooner if we've only been paused for a short time. This is so a notification sound causing an auto-pause is
     // less of an interruption.
     //
@@ -191,9 +213,11 @@ - (void) queueUnpauseBlock {
     mach_timebase_info(&info);
     unpauseDelayNsec = unpauseDelayNsec * info.numer / info.denom;
 
-    // Clamp.
-    unpauseDelayNsec = std::min(kMaxUnpauseDelayNSec, unpauseDelayNsec);
-    unpauseDelayNsec = std::max(kMinUnpauseDelayNSec, unpauseDelayNsec);
+    // Clamp using user-configurable max delay and calculated min delay.
+    UInt64 maxUnpauseDelayNSec = maxUnpauseDelayMS * NSEC_PER_MSEC;
+    UInt64 minUnpauseDelayNSec = maxUnpauseDelayNSec / 10;
+    unpauseDelayNsec = std::min(maxUnpauseDelayNSec, unpauseDelayNsec);
+    unpauseDelayNsec = std::max(minUnpauseDelayNSec, unpauseDelayNsec);
 
     DebugMsg("BGMAutoPauseMusic::queueUnpauseBlock: Dispatched unpause block at %llu. unpauseDelayNsec=%llu",
              now,
@@ -202,17 +226,22 @@ - (void) queueUnpauseBlock {
     dispatch_after(dispatch_time(DISPATCH_TIME_NOW, unpauseDelayNsec),
                    pauseUnpauseMusicQueue,
                    ^{
-                       BOOL stillSilent = ([self deviceAudibleState] == kBGMDeviceIsSilent);
+                       BGMDeviceAudibleState currentState = [self deviceAudibleState];
+                       BOOL stillSilent = (currentState == kBGMDeviceIsSilent);
+                       BOOL isLatestUnpause = (startedUnpauseDelay == wentSilent);
 
-                       DebugMsg("BGMAutoPauseMusic::queueUnpauseBlock: Running unpause block dispatched at %llu.%s%s wentSilent=%llu",
+                       DebugMsg("BGMAutoPauseMusic::queueUnpauseBlock: Running unpause block dispatched at %llu. wePaused=%s, isLatest=%s, currentState=%s, wentSilent=%llu",
                                 startedUnpauseDelay,
-                                wePaused ? "" : " Not unpausing because we weren't the one who paused.",
-                                stillSilent ? "" : " Not unpausing because the device isn't silent.",
+                                wePaused ? "YES" : "NO",
+                                isLatestUnpause ? "YES" : "NO",
+                                currentState == kBGMDeviceIsSilent ? "Silent" : 
+                                (currentState == kBGMDeviceIsAudible ? "Audible" : "SilentExceptMusic"),
                                 wentSilent);
 
                        // Unpause if we were the one who paused. Also check that this is the most recent unpause block and the
                        // device is still silent, which means the audible state hasn't changed since this block was queued.
-                       if (wePaused && (startedUnpauseDelay == wentSilent) && stillSilent) {
+                       if (wePaused && isLatestUnpause && stillSilent) {
+                           DebugMsg("BGMAutoPauseMusic::queueUnpauseBlock: Unpausing music player");
                            wePaused = NO;
                            [musicPlayers.selectedMusicPlayer unpause];
                        }

BGMApp/BGMApp/BGMOutputDeviceMenuSection.mm

@@ -36,6 +36,7 @@
 
 // STL Includes
 #import <set>
+#import <vector>
 
 
 #pragma clang assume_nonnull begin
@@ -220,9 +221,9 @@ - (void) insertMenuItemsForDevice:(BGMAudioDevice)device {
     });
 
     if (numDataSources > 0) {
-        UInt32 dataSourceIDs[numDataSources];
+        std::vector<UInt32> dataSourceIDs(numDataSources);
         // This call updates numDataSources to the real number of IDs it added to our array.
-        device.GetAvailableDataSources(scope, channel, numDataSources, dataSourceIDs);
+        device.GetAvailableDataSources(scope, channel, numDataSources, dataSourceIDs.data());
 
         for (UInt32 i = 0; i < numDataSources; i++) {
             DebugMsg("BGMOutputDeviceMenuSection::createMenuItemsForDevice: "

BGMApp/BGMApp/BGMUserDefaults.h

@@ -60,6 +60,11 @@
 // exception is thrown.
 @property NSString* __nullable googlePlayMusicDesktopPlayerPermanentAuthCode;
 
+// Auto-pause delay settings in milliseconds. These control how long to wait before pausing/unpausing
+// music when other audio starts/stops playing.
+@property NSUInteger pauseDelayMS;
+@property NSUInteger maxUnpauseDelayMS;
+
 @end
 
 #pragma clang assume_nonnull end

BGMApp/BGMApp/BGMUserDefaults.m

@@ -34,6 +34,8 @@
 static NSString* const kDefaultKeySelectedMusicPlayerID = @"SelectedMusicPlayerID";
 static NSString* const kDefaultKeyPreferredDeviceUIDs   = @"PreferredDeviceUIDs";
 static NSString* const kDefaultKeyStatusBarIcon         = @"StatusBarIcon";
+static NSString* const kDefaultKeyPauseDelayMS          = @"PauseDelayMS";
+static NSString* const kDefaultKeyMaxUnpauseDelayMS     = @"MaxUnpauseDelayMS";
 
 // Labels for Keychain Data
 static NSString* const kKeychainLabelGPMDPAuthCode =
@@ -57,7 +59,11 @@ - (instancetype) initWithDefaults:(NSUserDefaults* __nullable)inDefaults {
         // here so we know when it's never been set. (If it hasn't, we try using BGMDevice's
         // kAudioDeviceCustomPropertyMusicPlayerBundleID property to tell which music player should
         // be selected. See BGMMusicPlayers.)
-        NSDictionary* defaultsDict = @{ kDefaultKeyAutoPauseMusicEnabled: @YES };
+        NSDictionary* defaultsDict = @{ 
+            kDefaultKeyAutoPauseMusicEnabled: @YES,
+            kDefaultKeyPauseDelayMS: @1500,
+            kDefaultKeyMaxUnpauseDelayMS: @3500
+        };
 
         if (defaults) {
             [defaults registerDefaults:defaultsDict];
@@ -89,6 +95,34 @@ - (void) setAutoPauseMusicEnabled:(BOOL)autoPauseMusicEnabled {
     [self setBool:kDefaultKeyAutoPauseMusicEnabled to:autoPauseMusicEnabled];
 }
 
+#pragma mark Auto-pause Delays
+
+- (NSUInteger) pauseDelayMS {
+    NSInteger delay = [self getInt:kDefaultKeyPauseDelayMS or:1500];
+    // Clamp to reasonable range: 0ms to 10000ms
+    delay = MAX(0, MIN(10000, delay));
+    return (NSUInteger)delay;
+}
+
+- (void) setPauseDelayMS:(NSUInteger)pauseDelayMS {
+    // Clamp to reasonable range: 0ms to 10000ms
+    NSUInteger clampedDelay = MAX(0, MIN(10000, pauseDelayMS));
+    [self setInt:kDefaultKeyPauseDelayMS to:(NSInteger)clampedDelay];
+}
+
+- (NSUInteger) maxUnpauseDelayMS {
+    NSInteger delay = [self getInt:kDefaultKeyMaxUnpauseDelayMS or:3500];
+    // Clamp to reasonable range: 0ms to 10000ms
+    delay = MAX(0, MIN(10000, delay));
+    return (NSUInteger)delay;
+}
+
+- (void) setMaxUnpauseDelayMS:(NSUInteger)maxUnpauseDelayMS {
+    // Clamp to reasonable range: 0ms to 10000ms
+    NSUInteger clampedDelay = MAX(0, MIN(10000, maxUnpauseDelayMS));
+    [self setInt:kDefaultKeyMaxUnpauseDelayMS to:(NSInteger)clampedDelay];
+}
+
 - (NSArray<NSString*>*) preferredDeviceUIDs {
     NSArray<NSString*>* __nullable uids = [self get:kDefaultKeyPreferredDeviceUIDs];
     return uids ? BGMNN(uids) : @[];

BGMApp/BGMApp/Preferences/BGMPreferencesMenu.h

@@ -27,6 +27,7 @@
 #import "BGMAudioDeviceManager.h"
 #import "BGMMusicPlayers.h"
 #import "BGMStatusBarItem.h"
+#import "BGMUserDefaults.h"
 
 // System Includes
 #import <Cocoa/Cocoa.h>
@@ -41,7 +42,8 @@ NS_ASSUME_NONNULL_BEGIN
           musicPlayers:(BGMMusicPlayers*)inMusicPlayers
          statusBarItem:(BGMStatusBarItem*)inStatusBarItem
             aboutPanel:(NSPanel*)inAboutPanel
- aboutPanelLicenseView:(NSTextView*)inAboutPanelLicenseView;
+ aboutPanelLicenseView:(NSTextView*)inAboutPanelLicenseView
+          userDefaults:(BGMUserDefaults*)inUserDefaults;
 
 @end