From e086f09d48cd2187b995b75468a74241343cd5c2 Mon Sep 17 00:00:00 2001
From: Colin Edwards <colin@recursivepenguin.com>
Date: Thu, 28 Dec 2023 22:46:59 -0600
Subject: [PATCH] android: add next and previous track to the jni bridge

This will allow the android client to directly make calls to the mpd process to change tracks

I went with camel case on the function names here, if you use an underscore
javac generates a function tht looks like this:
 JNIEXPORT void JNICALL Java_org_musicpd_Bridge_play_1previous

I figured what we ended up with looks a little nicer:
JNIEXPORT void JNICALL Java_org_musicpd_Bridge_playPrevious
---
 .../app/src/main/java/org/musicpd/Bridge.java |  2 ++
 src/Main.cxx                                  | 22 +++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/android/app/src/main/java/org/musicpd/Bridge.java b/android/app/src/main/java/org/musicpd/Bridge.java
index 6ad49e2d4..0ca31ebe6 100644
--- a/android/app/src/main/java/org/musicpd/Bridge.java
+++ b/android/app/src/main/java/org/musicpd/Bridge.java
@@ -18,4 +18,6 @@ public class Bridge {
 	public static native void run(Context context, LogListener logListener);
 	public static native void shutdown();
 	public static native void pause();
+	public static native void playNext();
+	public static native void playPrevious();
 }
diff --git a/src/Main.cxx b/src/Main.cxx
index 4a469bc4f..e66e7f277 100644
--- a/src/Main.cxx
+++ b/src/Main.cxx
@@ -614,6 +614,28 @@ Java_org_musicpd_Bridge_pause(JNIEnv *, jclass)
 			partition.pc.LockSetPause(true);
 }
 
+gcc_visibility_default
+JNIEXPORT void JNICALL
+Java_org_musicpd_Bridge_playNext(JNIEnv *, jclass)
+{
+	if (global_instance != nullptr)
+		BlockingCall(global_instance->event_loop, [&](){
+			for (auto &partition : global_instance->partitions)
+				partition.PlayNext();
+		});	
+}
+
+gcc_visibility_default
+JNIEXPORT void JNICALL
+Java_org_musicpd_Bridge_playPrevious(JNIEnv *, jclass)
+{
+		if (global_instance != nullptr)
+		BlockingCall(global_instance->event_loop, [&](){
+			for (auto &partition : global_instance->partitions)
+				partition.PlayPrevious();
+		});	
+}
+
 #else
 
 static inline void