From f8f6983f68a49caee65f993fe340e078113a4cd1 Mon Sep 17 00:00:00 2001
From: polymonster <alexandercdixon@gmail.com>
Date: Tue, 16 Jan 2024 21:00:50 +0000
Subject: [PATCH] - added more music and audio os related api's for ios
 initially

---
 core/pen/include/os.h     |  3 +++
 core/pen/source/ios/os.mm | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)

diff --git a/core/pen/include/os.h b/core/pen/include/os.h
index 0725155d..a5039e09 100644
--- a/core/pen/include/os.h
+++ b/core/pen/include/os.h
@@ -46,6 +46,7 @@ namespace pen
     void             os_create_directory(const Str& dir);
     void             os_open_url(const Str& url);
     void             os_ignore_slient();
+    void             os_enable_background_audio();
     f32              os_get_status_bar_portrait_height();
     void             os_haptic_selection_feedback();
 
@@ -70,5 +71,7 @@ namespace pen
     const music_item* music_get_items(); // returns stretchy buffer use sb_count for num items
     music_file        music_open_file(const music_item& item);
     void              music_close_file(const music_file& file);
+    void              music_enable_remote_control();
+    void              music_set_now_playing(const Str& artist, const Str& album, const Str& track);
 
 } // namespace pen
diff --git a/core/pen/source/ios/os.mm b/core/pen/source/ios/os.mm
index 5c73f337..d87838f6 100644
--- a/core/pen/source/ios/os.mm
+++ b/core/pen/source/ios/os.mm
@@ -29,6 +29,7 @@
 #import <AVFoundation/AVAudioFile.h>
 #import <AVFoundation/AVAudioSession.h>
 #import <MediaPlayer/MPMediaQuery.h>
+#import <MediaPlayer/MPNowPlayingInfoCenter.h>
 
 // the last 2 global externs \o/
 pen::user_info              pen_user_info;
@@ -427,6 +428,22 @@ void os_ignore_slient()
         }
     }
 
+    void os_enable_background_audio()
+    {
+        AVAudioSession *session = [AVAudioSession sharedInstance];
+        double rate = 24000.0; // This should match System::setSoftwareFormat 'samplerate' which defaults to 24000
+        s32 blockSize = 512; // This should match System::setDSPBufferSize 'bufferlength' which defaults to 512
+
+        BOOL success = [session setPreferredSampleRate:rate error:nil];
+        PEN_ASSERT(success);
+
+        success = [session setPreferredIOBufferDuration:blockSize / rate error:nil];
+        PEN_ASSERT(success);
+
+        success = [session setActive:TRUE error:nil];
+        PEN_ASSERT(success);
+    }
+
     f32 os_get_status_bar_portrait_height()
     {
         CGFloat h = [[[UIApplication sharedApplication] windows].firstObject windowScene].statusBarManager.statusBarFrame.size.height;
@@ -443,4 +460,26 @@ void os_haptic_selection_feedback()
             [generator release];
         }
     }
+
+    void music_enable_remote_control()
+    {
+        [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
+    }
+
+    void music_set_now_playing(const Str& artist, const Str& album, const Str& track)
+    {
+        @autoreleasepool {
+            NSString* nsartist = [NSString stringWithUTF8String:artist.c_str()];
+            NSString* nsalbum = [NSString stringWithUTF8String:album.c_str()];
+            NSString* nstrack = [NSString stringWithUTF8String:track.c_str()];
+            
+            NSMutableDictionary* info = [[NSMutableDictionary alloc] init];
+            [info setObject:nstrack forKey:MPMediaItemPropertyTitle];
+            [info setObject:nsalbum forKey:MPMediaItemPropertyAlbumTitle];
+            [info setObject:nsartist forKey:MPMediaItemPropertyArtist];
+            
+            [[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:info];
+            [info release];
+        }
+    }
 }