Merge branch 'release-0.2.0'

.gitignore

@@ -58,3 +58,9 @@ android/keystores/debug.keystore
 
 # generated by bob
 lib/
+
+# Android NDK
+android/*.iml
+android/ndkHelperBin
+android/.cxx
+android/.externalNativeBuild

README.md

@@ -1,9 +1,11 @@
 # react-native-piano-sampler
 
+[![NPM](https://nodei.co/npm/react-native-piano-sampler.png?compact=true)](https://nodei.co/npm/react-native-piano-sampler/)
+
 React Native Piano Sampler : Reads sf2 with FluidSynth(on Android) or sfz with AudioKit(on iOS)
 
 - [x] iOS/iPadOS Implementation
-- [ ] Android Implementation  
+- [x] Android Implementation  
 
 ## Installation
 
@@ -33,7 +35,8 @@ npm install --save react-native-piano-sampler
 - Goto the iOS project folder, and do `pod install`
 
 ### Prerequisites (Android)
-- Preparing
+- Download the [soudfont(Full Grand Piano)](https://drive.google.com/file/d/1JHae8NALSvLDuF9nFqtqqipcY9Fo1fuD/view?usp=sharing) and move to `{ProjDirectory}/android/app/src/main/assets`.
+- You are good to go :smile:
 
 
 ### Usage in React Native Code

android/build.gradle

@@ -8,7 +8,7 @@ buildscript {
   }
 
   dependencies {
-    classpath 'com.android.tools.build:gradle:3.2.1'
+    classpath "com.android.tools.build:gradle:3.5.0"
     // noinspection DifferentKotlinGradleVersion
     classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
   }
@@ -33,9 +33,13 @@ android {
     targetSdkVersion getExtOrIntegerDefault('targetSdkVersion')
     versionCode 1
     versionName "1.0"
-
+    externalNativeBuild {
+      cmake {
+        cppFlags ""
+      }
+    }
   }
-  
+
   buildTypes {
     release {
       minifyEnabled false
@@ -48,6 +52,11 @@ android {
     sourceCompatibility JavaVersion.VERSION_1_8
     targetCompatibility JavaVersion.VERSION_1_8
   }
+  externalNativeBuild {
+    cmake {
+      path "src/main/jni/fluidsynth/android/CMakeLists.txt"
+    }
+  }
 }
 
 repositories {
@@ -127,4 +136,5 @@ dependencies {
   // noinspection GradleDynamicVersion
   api 'com.facebook.react:react-native:+'
   implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+  implementation 'com.squareup.okio:okio:1.14.0'
 }

android/src/main/java/com/reactnativepianosampler/NativeLibJNI.kt

@@ -0,0 +1,9 @@
+package com.reactnativepianosampler
+
+class NativeLibJNI {
+  external fun init(sf2path: String)
+  external fun noteOn(key: Int, velocity: Int)
+  external fun noteOff(key: Int)
+  external fun programChange(channel: Int, programNumber: Int) : Boolean
+  external fun destroy()
+}

android/src/main/java/com/reactnativepianosampler/PianoSamplerModule.kt

@@ -1,28 +1,76 @@
 package com.reactnativepianosampler
 
+import com.facebook.react.bridge.LifecycleEventListener
 import com.facebook.react.bridge.ReactApplicationContext
 import com.facebook.react.bridge.ReactContextBaseJavaModule
 import com.facebook.react.bridge.ReactMethod
-import com.facebook.react.bridge.Promise
+import okio.Okio
+import java.io.File
 
-class PianoSamplerModule(reactContext: ReactApplicationContext) : ReactContextBaseJavaModule(reactContext) {
+class PianoSamplerModule(reactContext: ReactApplicationContext) : ReactContextBaseJavaModule(reactContext), LifecycleEventListener {
+
+    companion object {
+
+        private const val SF2_FILE_NAME = "Full Grand Piano.sf2"
+
+        // Used to load the 'fluidsynth' library on application startup.
+        // Check the CMakeLists.txt that is referenced in app/build.gradle,
+        // within it there is the statement 'add_library' which specifies
+        // this identifier.
+        init {
+            System.loadLibrary("fluidsynth")
+        }
+    }
+
+    private var context:ReactApplicationContext = reactContext
+
+    private val nativeLibJNI = NativeLibJNI()
+    private lateinit var sf2file: File
+
+    init {
+        context.addLifecycleEventListener(this);
+    }
 
     override fun getName(): String {
         return "PianoSampler"
     }
 
     @ReactMethod
     fun playNote(midiNum: Int, velocity: Int) {
-        print("Kotlin> playNote");
+        nativeLibJNI.noteOn(midiNum, velocity)
     }
 
     @ReactMethod
     fun stopNote(midiNum: Int) {
-        print("Kotlin> stopNote");
+        nativeLibJNI.noteOff(midiNum);
     }
 
     @ReactMethod
     fun prepare() {
-        print("Kotlin> prepare");
+        sf2file = File(context.filesDir, SF2_FILE_NAME)
+        copySF2IfNecessary() // sf2 file needs to be in internal directory, not assets
+        nativeLibJNI.init(sf2file.absolutePath)
     }
+
+    private fun copySF2IfNecessary() {
+        if (sf2file.exists() && sf2file.length() > 0) return
+        Okio.source(context.assets.open(SF2_FILE_NAME)).use { a ->
+            Okio.buffer(Okio.sink(sf2file)).use { b ->
+                b.writeAll(a)
+            }
+        }
+    }
+
+  override fun onHostResume() {
+
+  }
+
+  override fun onHostPause() {
+
+  }
+
+  override fun onHostDestroy() {
+      nativeLibJNI.destroy()
+  }
+
 }

android/src/main/jni/fluidsynth/android/CMakeLists.txt

@@ -0,0 +1,86 @@
+cmake_minimum_required(VERSION 3.4.1)
+
+set(src_DIR ../src)
+
+set(fluidsynth_sources
+        ${src_DIR}/midi/fluid_midi.c
+        ${src_DIR}/midi/fluid_midi_router.c
+        ${src_DIR}/midi/fluid_seq.c
+        ${src_DIR}/midi/fluid_seqbind.c
+        ${src_DIR}/rvoice/fluid_adsr_env.c
+        ${src_DIR}/rvoice/fluid_chorus.c
+        ${src_DIR}/rvoice/fluid_iir_filter.c
+        ${src_DIR}/rvoice/fluid_lfo.c
+        ${src_DIR}/rvoice/fluid_rev.c
+        ${src_DIR}/rvoice/fluid_rvoice.c
+        ${src_DIR}/rvoice/fluid_rvoice_dsp.c
+        ${src_DIR}/rvoice/fluid_rvoice_event.c
+        ${src_DIR}/rvoice/fluid_rvoice_mixer.c
+        ${src_DIR}/sfloader/fluid_defsfont.c
+        ${src_DIR}/sfloader/fluid_ramsfont.c
+        ${src_DIR}/sfloader/fluid_sfont.c
+        ${src_DIR}/synth/fluid_chan.c
+        ${src_DIR}/synth/fluid_event.c
+        ${src_DIR}/synth/fluid_gen.c
+        ${src_DIR}/synth/fluid_mod.c
+        ${src_DIR}/synth/fluid_synth.c
+        ${src_DIR}/synth/fluid_tuning.c
+        ${src_DIR}/synth/fluid_voice.c
+        ${src_DIR}/synth/fluid_synth_monopoly.c
+        ${src_DIR}/utils/fluid_conv.c
+        ${src_DIR}/utils/fluid_hash.c
+        ${src_DIR}/utils/fluid_list.c
+        ${src_DIR}/utils/fluid_ringbuffer.c
+        ${src_DIR}/utils/fluid_settings.c
+        ${src_DIR}/bindings/fluid_filerenderer.c
+        ${src_DIR}/drivers/fluid_adriver.c
+        ${src_DIR}/drivers/fluid_opensles.c
+        ${src_DIR}/utils/fluid_sys.c
+        src/bindings/fluid_cmd.c
+        src/drivers/fluid_mdriver.c
+        ../../native-lib.cpp # This line needs to be removed; It's only for testing purposes
+)
+
+set ( public_main_HEADER
+    ${CMAKE_BINARY_DIR}/include/fluidsynth.h
+)
+
+configure_file ( ../include/fluidsynth.cmake
+                 ${public_main_HEADER} )
+
+add_library(fluidsynth SHARED ${fluidsynth_sources})
+
+if(ANDROID_ABI STREQUAL "armeabi-v7a")
+        target_compile_options(fluidsynth PRIVATE -DWITH_FLOAT)
+endif()
+if(ANDROID_ABI STREQUAL "x86")
+        target_compile_options(fluidsynth PRIVATE -DWITH_FLOAT)
+endif()
+
+# Specify directories which the compiler should look for headers
+target_include_directories(fluidsynth PRIVATE
+                            . include
+                            ${src_DIR}/../include
+                            ${src_DIR}/synth
+                            ${src_DIR}/midi
+                            ${src_DIR}/rvoice
+                            ${src_DIR}/sfloader
+                            ${src_DIR}/utils
+                            ${src_DIR}/bindings
+                            ${src_DIR}/drivers
+                            ${CMAKE_BINARY_DIR}/include
+                            )
+
+target_include_directories(fluidsynth INTERFACE
+                            . include
+                            ${src_DIR}/../include
+                            ${CMAKE_BINARY_DIR}/include
+                            )
+
+target_compile_options(fluidsynth
+                            PRIVATE -Wall
+                            PRIVATE -DHAVE_CONFIG_H
+                            PRIVATE -Wno-unused-variable
+                            PRIVATE "$<$<CONFIG:DEBUG>:-Werror>") # Only include -Werror when building debug config
+
+target_link_libraries (fluidsynth OpenSLES log)