Add iOS support (#65)

.gitignore

@@ -21,3 +21,15 @@ run-zh.sh
 decode-file-c-api
 run-decode-file-c-api.sh
 sherpa-onnx-ffmpeg
+build-ios
+build-swift-macos
+aa.sh
+client-2.sh
+ffmpeg-examples/run-3.sh
+python-api-examples/decode-file-multiple-bak-2.py
+run-en-zipformer-microphone*
+run-websocket-server*
+decode-file
+*.dylib
+tokens.txt
+*.onnx

android/SherpaOnnx/.idea/deploymentTargetDropDown.xml

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="deploymentTargetDropDown">
-    <runningDeviceTargetSelectedWithDropDown>
-      <Target>
-        <type value="RUNNING_DEVICE_TARGET" />
-        <deviceKey>
-          <Key>
-            <type value="SERIAL_NUMBER" />
-            <value value="50e6c115" />
-          </Key>
-        </deviceKey>
-      </Target>
-    </runningDeviceTargetSelectedWithDropDown>
-    <timeTargetWasSelectedWithDropDown value="2023-02-23T09:59:16.822185Z" />
-  </component>
-</project>

android/SherpaOnnx/.idea/gradle.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>

build-ios.sh

@@ -0,0 +1,158 @@
+#!/usr/bin/env  bash
+
+set -e
+
+dir=build-ios
+mkdir -p $dir
+cd $dir
+
+if [ ! -f ios-onnxruntime/onnxruntime.xcframework/ios-arm64/onnxruntime.a ]; then
+  GIT_LFS_SKIP_SMUDGE=1 git clone https://huggingface.co/csukuangfj/ios-onnxruntime
+  pushd ios-onnxruntime
+  git lfs pull --include onnxruntime.xcframework/ios-arm64/onnxruntime.a
+  git lfs pull --include onnxruntime.xcframework/ios-arm64_x86_64-simulator/onnxruntime.a
+  popd
+fi
+
+# check filesize
+filesize=$(ls -l ./ios-onnxruntime/onnxruntime.xcframework/ios-arm64/onnxruntime.a  | tr -s " " " " | cut -d " " -f 5)
+if (( $filesize < 1000 )); then
+  ls -lh ./ios-onnxruntime/onnxruntime.xcframework/ios-arm64/onnxruntime.a
+  echo "Please use: git lfs pull to download ./ios-onnxruntime/onnxruntime.xcframework/ios-arm64/onnxruntime.a"
+  exit 1
+fi
+
+filesize=$(ls -l ./ios-onnxruntime/onnxruntime.xcframework/ios-arm64_x86_64-simulator/onnxruntime.a  | tr -s " " " " | cut -d " " -f 5)
+if (( $filesize < 1000 )); then
+  ls -lh ./ios-onnxruntime/onnxruntime.xcframework/ios-arm64_x86_64-simulator/onnxruntime.a
+  echo "Please use: git lfs pull to download ./ios-onnxruntime/onnxruntime.xcframework/ios-arm64_x86_64-simulator/onnxruntime.a"
+  exit 1
+fi
+
+# First, for simulator
+echo "Building for simulator (x86_64)"
+
+export SHERPA_ONNXRUNTIME_LIB_DIR=$PWD/ios-onnxruntime/onnxruntime.xcframework/ios-arm64_x86_64-simulator
+export SHERPA_ONNXRUNTIME_INCLUDE_DIR=$PWD/ios-onnxruntime/onnxruntime.xcframework/Headers
+
+echo "SHERPA_ONNXRUNTIME_LIB_DIR: $SHERPA_ONNXRUNTIME_LIB_DIR"
+echo "SHERPA_ONNXRUNTIME_INCLUDE_DIR $SHERPA_ONNXRUNTIME_INCLUDE_DIR"
+
+# Note: We use -DENABLE_ARC=1 here to fix the linking error:
+#
+# The symbol _NSLog is not defined
+#
+
+cmake \
+  -S .. \
+  -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
+  -DPLATFORM=SIMULATOR64 \
+  -DENABLE_BITCODE=0 \
+  -DENABLE_ARC=1 \
+  -DENABLE_VISIBILITY=0 \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DBUILD_SHARED_LIBS=OFF \
+  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+  -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+  -DSHERPA_ONNX_ENABLE_JNI=OFF \
+  -DSHERPA_ONNX_ENABLE_C_API=ON \
+  -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
+  -DDEPLOYMENT_TARGET=13.0 \
+  -B build/simulator_x86_64
+
+cmake --build build/simulator_x86_64 -j 4 --verbose
+
+echo "Building for simulator (arm64)"
+
+cmake \
+  -S .. \
+  -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
+  -DPLATFORM=SIMULATORARM64 \
+  -DENABLE_BITCODE=0 \
+  -DENABLE_ARC=1 \
+  -DENABLE_VISIBILITY=0 \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DCMAKE_INSTALL_PREFIX=./install \
+  -DBUILD_SHARED_LIBS=OFF \
+  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+  -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+  -DSHERPA_ONNX_ENABLE_JNI=OFF \
+  -DSHERPA_ONNX_ENABLE_C_API=ON \
+  -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
+  -DDEPLOYMENT_TARGET=13.0 \
+  -B build/simulator_arm64
+
+cmake --build build/simulator_arm64 -j 4 --verbose
+
+echo "Building for arm64"
+
+export SHERPA_ONNXRUNTIME_LIB_DIR=$PWD/ios-onnxruntime/onnxruntime.xcframework/ios-arm64
+
+
+cmake \
+  -S .. \
+  -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
+  -DPLATFORM=OS64 \
+  -DENABLE_BITCODE=0 \
+  -DENABLE_ARC=1 \
+  -DENABLE_VISIBILITY=0 \
+  -DCMAKE_INSTALL_PREFIX=./install \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DBUILD_SHARED_LIBS=OFF \
+  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+  -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+  -DSHERPA_ONNX_ENABLE_JNI=OFF \
+  -DSHERPA_ONNX_ENABLE_C_API=ON \
+  -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
+  -DDEPLOYMENT_TARGET=13.0 \
+  -B build/os64
+
+cmake --build build/os64 -j 4
+# Generate headers for sherpa-onnx.xcframework
+cmake --build build/os64 --target install
+
+echo "Generate xcframework"
+
+mkdir -p "build/simulator/lib"
+for f in libkaldi-native-fbank-core.a libsherpa-onnx-c-api.a libsherpa-onnx-core.a; do
+  lipo -create build/simulator_arm64/lib/${f} \
+               build/simulator_x86_64/lib/${f} \
+       -output build/simulator/lib/${f}
+done
+
+# Merge archive first, because the following xcodebuild create xcframework
+# cannot accept multi archive with the same architecture.
+libtool -static -o build/simulator/sherpa-onnx.a \
+  build/simulator/lib/libkaldi-native-fbank-core.a \
+  build/simulator/lib/libsherpa-onnx-c-api.a \
+  build/simulator/lib/libsherpa-onnx-core.a
+
+libtool -static -o build/os64/sherpa-onnx.a \
+  build/os64/lib/libkaldi-native-fbank-core.a \
+  build/os64/lib/libsherpa-onnx-c-api.a \
+  build/os64/lib/libsherpa-onnx-core.a
+
+
+rm -rf sherpa-onnx.xcframework
+
+xcodebuild -create-xcframework \
+      -library "build/os64/sherpa-onnx.a" \
+      -library "build/simulator/sherpa-onnx.a" \
+      -output sherpa-onnx.xcframework
+
+# Copy Headers
+mkdir -p sherpa-onnx.xcframework/Headers
+cp -av install/include/* sherpa-onnx.xcframework/Headers
+
+pushd sherpa-onnx.xcframework/ios-arm64_x86_64-simulator
+ln -s sherpa-onnx.a libsherpa-onnx.a
+popd
+
+pushd sherpa-onnx.xcframework/ios-arm64
+ln -s sherpa-onnx.a libsherpa-onnx.a

build-swift-macos.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env  bash
+
+set -ex
+
+dir=build-swift-macos
+mkdir -p $dir
+cd $dir
+
+cmake \
+  -DCMAKE_OSX_ARCHITECTURES="x86_64" \
+  -DCMAKE_INSTALL_PREFIX=./install \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DBUILD_SHARED_LIBS=OFF \
+  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+  -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+  -DSHERPA_ONNX_ENABLE_JNI=OFF \
+  -DSHERPA_ONNX_ENABLE_C_API=ON \
+  -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
+  ../
+
+make VERBOSE=1 -j4
+make install
+
+libtool -static -o ./install/lib/libsherpa-onnx.a \
+  ./install/lib/libsherpa-onnx-c-api.a \
+  ./install/lib/libsherpa-onnx-core.a \
+  ./install/lib/libkaldi-native-fbank-core.a

cmake/onnxruntime.cmake

@@ -134,7 +134,7 @@ endfunction()
 message(STATUS "CMAKE_SYSTEM_NAME: ${CMAKE_SYSTEM_NAME}")
 message(STATUS "CMAKE_SYSTEM_PROCESSOR: ${CMAKE_SYSTEM_PROCESSOR}")
 
-if(ANDROID)
+if(DEFINED ENV{SHERPA_ONNXRUNTIME_INCLUDE_DIR})
   set(location_onnxruntime_header_dir $ENV{SHERPA_ONNXRUNTIME_INCLUDE_DIR})
 else()
   find_path(location_onnxruntime_header_dir onnxruntime_cxx_api.h
@@ -146,8 +146,11 @@ endif()
 
 message(STATUS "location_onnxruntime_header_dir: ${location_onnxruntime_header_dir}")
 
-if(ANDROID)
+if(DEFINED ENV{SHERPA_ONNXRUNTIME_LIB_DIR})
   set(location_onnxruntime_lib $ENV{SHERPA_ONNXRUNTIME_LIB_DIR}/libonnxruntime.so)
+  if(NOT EXISTS ${location_onnxruntime_lib})
+    set(location_onnxruntime_lib $ENV{SHERPA_ONNXRUNTIME_LIB_DIR}/libonnxruntime.a)
+  endif()
 else()
   find_library(location_onnxruntime_lib onnxruntime
     PATHS

ffmpeg-examples/Makefile

@@ -14,7 +14,8 @@ ifeq ($(GDB), TRUE)
 	OPTFLAG += -g
 endif
 
-CFLAGS := $(shell pkg-config --cflags $(SHARED_LIBS)) -I.. -Wall -std=c++11 -fopenmp ${OPTFLAG}
+# CFLAGS := $(shell pkg-config --cflags $(SHARED_LIBS)) -I.. -Wall -std=c++11 -fopenmp ${OPTFLAG}
+CFLAGS := $(shell pkg-config --cflags $(SHARED_LIBS)) -I.. -Wall -std=c++11 ${OPTFLAG}
 LDLIBS := $(shell pkg-config --libs $(SHARED_LIBS))
 
 CUR_DIR :=$(shell pwd)

ios-swift/SherpaOnnx/SherpaOnnx.xcodeproj/project.pbxproj

@@ -0,0 +1,635 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 56;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		C984A7E829A9EEB700D74C52 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = C984A7E729A9EEB700D74C52 /* AppDelegate.swift */; };
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+			proxyType = 1;
+			remoteGlobalIDString = C984A7E329A9EEB700D74C52;
+			remoteInfo = SherpaOnnx;
+		};
+		C984A80529A9EEBA00D74C52 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = C984A7DC29A9EEB700D74C52 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = C984A7E329A9EEB700D74C52;
+			remoteInfo = SherpaOnnx;
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXFileReference section */
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+				C984A83F29AA43EE00D74C52 /* onnxruntime.xcframework in Frameworks */,
+				C984A83D29AA43D900D74C52 /* sherpa-onnx.xcframework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
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+			);
+			runOnlyForDeploymentPostprocessing = 0;
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+			isa = PBXGroup;
+			children = (
+				C984A7E629A9EEB700D74C52 /* SherpaOnnx */,
+				C984A7FD29A9EEBA00D74C52 /* SherpaOnnxTests */,
+				C984A80729A9EEBA00D74C52 /* SherpaOnnxUITests */,
+				C984A7E529A9EEB700D74C52 /* Products */,
+				C984A81A29AA11C500D74C52 /* Frameworks */,
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+			sourceTree = "<group>";
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+				C984A80429A9EEBA00D74C52 /* SherpaOnnxUITests.xctest */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		C984A7E629A9EEB700D74C52 /* SherpaOnnx */ = {
+			isa = PBXGroup;
+			children = (
+				C984A83B29AA430B00D74C52 /* ViewController.swift */,
+				C984A82929AA19AC00D74C52 /* Model.swift */,
+				C984A81829AA119400D74C52 /* SherpaOnnx.swift */,
+				C984A81729A9F51B00D74C52 /* SherpaOnnx-Bridging-Header.h */,
+				C984A7E729A9EEB700D74C52 /* AppDelegate.swift */,
+				C984A7E929A9EEB700D74C52 /* SceneDelegate.swift */,
+				C984A82629AA196100D74C52 /* Main.storyboard */,
+				C984A7F029A9EEB900D74C52 /* Assets.xcassets */,
+				C984A7F229A9EEB900D74C52 /* LaunchScreen.storyboard */,
+				C984A7F529A9EEB900D74C52 /* Info.plist */,
+			);
+			path = SherpaOnnx;
+			sourceTree = "<group>";
+		};
+		C984A7FD29A9EEBA00D74C52 /* SherpaOnnxTests */ = {
+			isa = PBXGroup;
+			children = (
+				C984A7FE29A9EEBA00D74C52 /* SherpaOnnxTests.swift */,
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+		};
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+			isa = PBXGroup;
+			children = (
+				C984A80829A9EEBA00D74C52 /* SherpaOnnxUITests.swift */,
+				C984A80A29A9EEBA00D74C52 /* SherpaOnnxUITestsLaunchTests.swift */,
+			);
+			path = SherpaOnnxUITests;
+			sourceTree = "<group>";
+		};
+		C984A81A29AA11C500D74C52 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				C984A82029AA139600D74C52 /* onnxruntime.xcframework */,
+				C984A83E29AA43EE00D74C52 /* onnxruntime.xcframework */,
+				C984A81B29AA11C500D74C52 /* sherpa-onnx.xcframework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
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ios-swift/SherpaOnnx/SherpaOnnx.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
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+      location = "self:">
+   </FileRef>
+</Workspace>

ios-swift/SherpaOnnx/SherpaOnnx.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

ios-swift/SherpaOnnx/SherpaOnnx.xcodeproj/xcuserdata/fangjun.xcuserdatad/xcschemes/xcschememanagement.plist

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>SherpaOnnx.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>

ios-swift/SherpaOnnx/SherpaOnnx/AppDelegate.swift

@@ -0,0 +1,36 @@
+//
+//  AppDelegate.swift
+//  SherpaOnnx
+//
+//  Created by fangjun on 2023/2/25.
+//
+
+import UIKit
+
+@main
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+        // Override point for customization after application launch.
+        return true
+    }
+
+    // MARK: UISceneSession Lifecycle
+
+    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
+        // Called when a new scene session is being created.
+        // Use this method to select a configuration to create the new scene with.
+        return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
+    }
+
+    func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
+        // Called when the user discards a scene session.
+        // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
+        // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
+    }
+
+
+}
+

ios-swift/SherpaOnnx/SherpaOnnx/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ios-swift/SherpaOnnx/SherpaOnnx/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,14 @@
+{
+  "images" : [
+    {
+      "filename" : "k2-1024x1024.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ios-swift/SherpaOnnx/SherpaOnnx/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ios-swift/SherpaOnnx/SherpaOnnx/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+</document>

ios-swift/SherpaOnnx/SherpaOnnx/Base.lproj/Main.storyboard

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="21507" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+    <device id="retina6_12" orientation="portrait" appearance="light"/>
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="21505"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="System colors in document resources" minToolsVersion="11.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="SherpaNcnn" customModuleProvider="target" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="393" height="852"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="7q8-Y3-WbJ">
+                                <rect key="frame" x="166" y="773" width="61.333333333333343" height="35"/>
+                                <state key="normal" title="Button"/>
+                                <buttonConfiguration key="configuration" style="plain" title="Start"/>
+                                <connections>
+                                    <action selector="onRecordBtnClick:" destination="BYZ-38-t0r" eventType="touchUpInside" id="rS6-DT-XWm"/>
+                                </connections>
+                            </button>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Label" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="jfS-7J-m9C">
+                                <rect key="frame" x="8" y="67" width="377" height="20.333333333333329"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                        </subviews>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                        <color key="backgroundColor" systemColor="systemBackgroundColor"/>
+                        <constraints>
+                            <constraint firstItem="jfS-7J-m9C" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="8" id="HX3-rI-U9E"/>
+                            <constraint firstItem="jfS-7J-m9C" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" constant="8" id="NEv-PD-DHj"/>
+                            <constraint firstItem="7q8-Y3-WbJ" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="Nha-gf-R2b"/>
+                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="jfS-7J-m9C" secondAttribute="trailing" constant="8" id="P2f-hG-O2e"/>
+                            <constraint firstAttribute="bottomMargin" secondItem="7q8-Y3-WbJ" secondAttribute="bottom" constant="10" id="Pgb-4G-ySa"/>
+                        </constraints>
+                    </view>
+                    <connections>
+                        <outlet property="recordBtn" destination="7q8-Y3-WbJ" id="mFd-cu-zjn"/>
+                        <outlet property="resultLabel" destination="jfS-7J-m9C" id="xQU-ID-m5Q"/>
+                    </connections>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="32.824427480916029" y="3.5211267605633805"/>
+        </scene>
+    </scenes>
+    <resources>
+        <systemColor name="systemBackgroundColor">
+            <color white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+        </systemColor>
+    </resources>
+</document>

ios-swift/SherpaOnnx/SherpaOnnx/Info.plist

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>Need microphone access for Next-gen Kaldi to work</string>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<false/>
+		<key>UISceneConfigurations</key>
+		<dict>
+			<key>UIWindowSceneSessionRoleApplication</key>
+			<array>
+				<dict>
+					<key>UISceneConfigurationName</key>
+					<string>Default Configuration</string>
+					<key>UISceneDelegateClassName</key>
+					<string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
+					<key>UISceneStoryboardFile</key>
+					<string>Main</string>
+				</dict>
+			</array>
+		</dict>
+	</dict>
+</dict>
+</plist>

ios-swift/SherpaOnnx/SherpaOnnx/Model.swift

@@ -0,0 +1,35 @@
+import Foundation
+
+func getResource(_ forResource: String, _ ofType: String) -> String {
+  let path = Bundle.main.path(forResource: forResource, ofType: ofType)
+  precondition(
+    path != nil,
+    "\(forResource).\(ofType) does not exist!\n" + "Remember to change \n"
+      + "  Build Phases -> Copy Bundle Resources\n" + "to add it!"
+  )
+  return path!
+}
+/// Please refer to
+/// https://k2-fsa.github.io/sherpa/onnx/pretrained_models/index.html
+/// to download pre-trained models
+
+/// sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20 (Bilingual, Chinese + English)
+/// https://k2-fsa.github.io/sherpa/onnx/pretrained_models/zipformer-transducer-models.html
+func getBilingualStreamZhEnZipformer20230220() -> SherpaOnnxOnlineTransducerModelConfig {
+  let encoder = getResource("encoder-epoch-99-avg-1", "onnx")
+  let decoder = getResource("decoder-epoch-99-avg-1", "onnx")
+  let joiner = getResource("joiner-epoch-99-avg-1", "onnx")
+  let tokens = getResource("tokens", "txt")
+
+  return sherpaOnnxOnlineTransducerModelConfig(
+    encoder: encoder,
+    decoder: decoder,
+    joiner: joiner,
+    tokens: tokens,
+    numThreads: 2
+  )
+}
+
+/// Please refer to
+/// https://k2-fsa.github.io/sherpa/onnx/pretrained_models/index.html
+/// to add more models if you need

ios-swift/SherpaOnnx/SherpaOnnx/SceneDelegate.swift

@@ -0,0 +1,52 @@
+//
+//  SceneDelegate.swift
+//  SherpaOnnx
+//
+//  Created by fangjun on 2023/2/25.
+//
+
+import UIKit
+
+class SceneDelegate: UIResponder, UIWindowSceneDelegate {
+
+    var window: UIWindow?
+
+
+    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
+        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
+        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
+        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
+        guard let _ = (scene as? UIWindowScene) else { return }
+    }
+
+    func sceneDidDisconnect(_ scene: UIScene) {
+        // Called as the scene is being released by the system.
+        // This occurs shortly after the scene enters the background, or when its session is discarded.
+        // Release any resources associated with this scene that can be re-created the next time the scene connects.
+        // The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
+    }
+
+    func sceneDidBecomeActive(_ scene: UIScene) {
+        // Called when the scene has moved from an inactive state to an active state.
+        // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
+    }
+
+    func sceneWillResignActive(_ scene: UIScene) {
+        // Called when the scene will move from an active state to an inactive state.
+        // This may occur due to temporary interruptions (ex. an incoming phone call).
+    }
+
+    func sceneWillEnterForeground(_ scene: UIScene) {
+        // Called as the scene transitions from the background to the foreground.
+        // Use this method to undo the changes made on entering the background.
+    }
+
+    func sceneDidEnterBackground(_ scene: UIScene) {
+        // Called as the scene transitions from the foreground to the background.
+        // Use this method to save data, release shared resources, and store enough scene-specific state information
+        // to restore the scene back to its current state.
+    }
+
+
+}
+

ios-swift/SherpaOnnx/SherpaOnnx/ViewController.swift

@@ -0,0 +1,197 @@
+//
+//  ViewController.swift
+//  SherpaOnnx
+//
+//  Created by fangjun on 2023/1/28.
+//
+
+import AVFoundation
+import UIKit
+
+extension AudioBuffer {
+    func array() -> [Float] {
+        return Array(UnsafeBufferPointer(self))
+    }
+}
+
+extension AVAudioPCMBuffer {
+    func array() -> [Float] {
+        return self.audioBufferList.pointee.mBuffers.array()
+    }
+}
+
+class ViewController: UIViewController {
+    @IBOutlet weak var resultLabel: UILabel!
+    @IBOutlet weak var recordBtn: UIButton!
+    
+    var audioEngine: AVAudioEngine? = nil
+    var recognizer: SherpaOnnxRecognizer! = nil
+    
+    /// It saves the decoded results so far
+    var sentences: [String] = [] {
+        didSet {
+            updateLabel()
+        }
+    }
+    var lastSentence: String = ""
+    let maxSentence: Int = 20
+    var results: String {
+        if sentences.isEmpty && lastSentence.isEmpty {
+            return ""
+        }
+        if sentences.isEmpty {
+            return "0: \(lastSentence.lowercased())"
+        }
+        
+        let start = max(sentences.count - maxSentence, 0)
+        if lastSentence.isEmpty {
+            return sentences.enumerated().map { (index, s) in "\(index): \(s.lowercased())" }[start...]
+                .joined(separator: "\n")
+        } else {
+            return sentences.enumerated().map { (index, s) in "\(index): \(s.lowercased())" }[start...]
+                .joined(separator: "\n") + "\n\(sentences.count): \(lastSentence.lowercased())"
+        }
+    }
+    
+    func updateLabel() {
+        DispatchQueue.main.async {
+            self.resultLabel.text = self.results
+        }
+    }
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        // Do any additional setup after loading the view.
+        
+        resultLabel.text = "ASR with Next-gen Kaldi\n\nPress the Start button to run!"
+        recordBtn.setTitle("Start", for: .normal)
+        initRecognizer()
+        initRecorder()
+    }
+    
+    @IBAction func onRecordBtnClick(_ sender: UIButton) {
+        if recordBtn.currentTitle == "Start" {
+            startRecorder()
+            recordBtn.setTitle("Stop", for: .normal)
+        } else {
+            stopRecorder()
+            recordBtn.setTitle("Start", for: .normal)
+        }
+    }
+    
+    func initRecognizer() {
+        // Please select one model that is best suitable for you.
+        //
+        // You can also modify Model.swift to add new pre-trained models from
+        // https://k2-fsa.github.io/sherpa/ncnn/pretrained_models/index.html
+        
+        let modelConfig = getBilingualStreamZhEnZipformer20230220()
+        
+        let featConfig = sherpaOnnxFeatureConfig(
+            sampleRate: 16000,
+            featureDim: 80)
+        
+        var config = sherpaOnnxOnlineRecognizerConfig(
+            featConfig: featConfig,
+            modelConfig: modelConfig,
+            enableEndpoint: true,
+            rule1MinTrailingSilence: 2.4,
+            rule2MinTrailingSilence: 0.8,
+            rule3MinUtteranceLength: 30
+        )
+        recognizer = SherpaOnnxRecognizer(config: &config)
+    }
+    
+    func initRecorder() {
+        print("init recorder")
+        audioEngine = AVAudioEngine()
+        let inputNode = self.audioEngine?.inputNode
+        let bus = 0
+        let inputFormat = inputNode?.outputFormat(forBus: bus)
+        let outputFormat = AVAudioFormat(
+            commonFormat: .pcmFormatFloat32,
+            sampleRate: 16000, channels: 1,
+            interleaved: false)!
+        
+        let converter = AVAudioConverter(from: inputFormat!, to: outputFormat)!
+        
+        inputNode!.installTap(
+            onBus: bus,
+            bufferSize: 1024,
+            format: inputFormat
+        ) {
+            (buffer: AVAudioPCMBuffer, when: AVAudioTime) in
+            var newBufferAvailable = true
+            
+            let inputCallback: AVAudioConverterInputBlock = {
+                inNumPackets, outStatus in
+                if newBufferAvailable {
+                    outStatus.pointee = .haveData
+                    newBufferAvailable = false
+                    
+                    return buffer
+                } else {
+                    outStatus.pointee = .noDataNow
+                    return nil
+                }
+            }
+            
+            let convertedBuffer = AVAudioPCMBuffer(
+                pcmFormat: outputFormat,
+                frameCapacity:
+                    AVAudioFrameCount(outputFormat.sampleRate)
+                * buffer.frameLength
+                / AVAudioFrameCount(buffer.format.sampleRate))!
+            
+            var error: NSError?
+            let _ = converter.convert(
+                to: convertedBuffer,
+                error: &error, withInputFrom: inputCallback)
+            
+            // TODO(fangjun): Handle status != haveData
+            
+            let array = convertedBuffer.array()
+            if !array.isEmpty {
+                self.recognizer.acceptWaveform(samples: array)
+                while (self.recognizer.isReady()){
+                    self.recognizer.decode()
+                }
+                let isEndpoint = self.recognizer.isEndpoint()
+                let text = self.recognizer.getResult().text
+                
+                if !text.isEmpty && self.lastSentence != text {
+                    self.lastSentence = text
+                    self.updateLabel()
+                    print(text)
+                }
+                
+                if isEndpoint {
+                    if !text.isEmpty {
+                        let tmp = self.lastSentence
+                        self.lastSentence = ""
+                        self.sentences.append(tmp)
+                    }
+                    self.recognizer.reset()
+                }
+            }
+        }
+        
+    }
+    
+    func startRecorder() {
+        lastSentence = ""
+        sentences = []
+        
+        do {
+            try self.audioEngine?.start()
+        } catch let error as NSError {
+            print("Got an error starting audioEngine: \(error.domain), \(error)")
+        }
+        print("started")
+    }
+    
+    func stopRecorder() {
+        audioEngine?.stop()
+        print("stopped")
+    }
+}

ios-swift/SherpaOnnx/SherpaOnnxTests/SherpaOnnxTests.swift

@@ -0,0 +1,36 @@
+//
+//  SherpaOnnxTests.swift
+//  SherpaOnnxTests
+//
+//  Created by fangjun on 2023/2/25.
+//
+
+import XCTest
+@testable import SherpaOnnx
+
+final class SherpaOnnxTests: XCTestCase {
+
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func testExample() throws {
+        // This is an example of a functional test case.
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
+        // Any test you write for XCTest can be annotated as throws and async.
+        // Mark your test throws to produce an unexpected failure when your test encounters an uncaught error.
+        // Mark your test async to allow awaiting for asynchronous code to complete. Check the results with assertions afterwards.
+    }
+
+    func testPerformanceExample() throws {
+        // This is an example of a performance test case.
+        self.measure {
+            // Put the code you want to measure the time of here.
+        }
+    }
+
+}

ios-swift/SherpaOnnx/SherpaOnnxUITests/SherpaOnnxUITests.swift

@@ -0,0 +1,41 @@
+//
+//  SherpaOnnxUITests.swift
+//  SherpaOnnxUITests
+//
+//  Created by fangjun on 2023/2/25.
+//
+
+import XCTest
+
+final class SherpaOnnxUITests: XCTestCase {
+
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+
+        // In UI tests it is usually best to stop immediately when a failure occurs.
+        continueAfterFailure = false
+
+        // In UI tests it’s important to set the initial state - such as interface orientation - required for your tests before they run. The setUp method is a good place to do this.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func testExample() throws {
+        // UI tests must launch the application that they test.
+        let app = XCUIApplication()
+        app.launch()
+
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
+    }
+
+    func testLaunchPerformance() throws {
+        if #available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 7.0, *) {
+            // This measures how long it takes to launch your application.
+            measure(metrics: [XCTApplicationLaunchMetric()]) {
+                XCUIApplication().launch()
+            }
+        }
+    }
+}

ios-swift/SherpaOnnx/SherpaOnnxUITests/SherpaOnnxUITestsLaunchTests.swift

@@ -0,0 +1,32 @@
+//
+//  SherpaOnnxUITestsLaunchTests.swift
+//  SherpaOnnxUITests
+//
+//  Created by fangjun on 2023/2/25.
+//
+
+import XCTest
+
+final class SherpaOnnxUITestsLaunchTests: XCTestCase {
+
+    override class var runsForEachTargetApplicationUIConfiguration: Bool {
+        true
+    }
+
+    override func setUpWithError() throws {
+        continueAfterFailure = false
+    }
+
+    func testLaunch() throws {
+        let app = XCUIApplication()
+        app.launch()
+
+        // Insert steps here to perform after app launch but before taking a screenshot,
+        // such as logging into a test account or navigating somewhere in the app
+
+        let attachment = XCTAttachment(screenshot: app.screenshot())
+        attachment.name = "Launch Screen"
+        attachment.lifetime = .keepAlways
+        add(attachment)
+    }
+}

sherpa-onnx/csrc/online-recognizer.cc

@@ -160,14 +160,17 @@ class OnlineRecognizer::Impl {
   }
 
   void Reset(OnlineStream *s) const {
-    // reset result and neural network model state,
+    // reset result, neural network model state, and
-    // but keep the feature extractor state
+    // the feature extractor state
 
     // reset result
     s->SetResult(decoder_->GetEmptyResult());
 
     // reset neural network model state
     s->SetStates(model_->GetEncoderInitStates());
+
+    // reset feature extractor
+    s->Reset();
   }
 
  private:

sherpa-onnx/csrc/online-stream.cc

@@ -32,7 +32,10 @@ class OnlineStream::Impl {
     return feat_extractor_.GetFrames(frame_index, n);
   }
 
-  void Reset() { feat_extractor_.Reset(); }
+  void Reset() {
+    feat_extractor_.Reset();
+    num_processed_frames_ = 0;
+  }
 
   int32_t &GetNumProcessedFrames() { return num_processed_frames_; }
 

swift-api-examples/SherpaOnnx-Bridging-Header.h

@@ -0,0 +1,9 @@
+// swfit-api-examples/SherpaOnnx-Bridging-Header.h
+//
+// Copyright (c)  2023  Xiaomi Corporation
+#ifndef SWIFT_API_EXAMPLES_SHERPAONNX_BRIDGING_HEADER_H_
+#define SWIFT_API_EXAMPLES_SHERPAONNX_BRIDGING_HEADER_H_
+
+#import "sherpa-onnx/c-api/c-api.h"
+
+#endif  // SWIFT_API_EXAMPLES_SHERPAONNX_BRIDGING_HEADER_H_

swift-api-examples/SherpaOnnx.swift

@@ -0,0 +1,171 @@
+/// swfit-api-examples/SherpaOnnx.swift
+/// Copyright (c)  2023  Xiaomi Corporation
+
+import Foundation  // For NSString
+
+/// Convert a String from swift to a `const char*` so that we can pass it to
+/// the C language.
+///
+/// - Parameters:
+///   - s: The String to convert.
+/// - Returns: A pointer that can be passed to C as `const char*`
+
+func toCPointer(_ s: String) -> UnsafePointer<Int8>! {
+  let cs = (s as NSString).utf8String
+  return UnsafePointer<Int8>(cs)
+}
+
+/// Return an instance of SherpaOnnxOnlineTransducerModelConfig.
+///
+/// Please refer to
+/// https://k2-fsa.github.io/sherpa/onnx/pretrained_models/index.html
+/// to download the required `.onnx` files.
+///
+/// - Parameters:
+///   - encoder: Path to encoder.onnx
+///   - decoder: Path to decoder.onnx
+///   - joiner: Path to joiner.onnx
+///   - tokens: Path to tokens.txt
+///   - numThreads:  Number of threads to use for neural network computation.
+///
+/// - Returns: Return an instance of SherpaOnnxOnlineTransducerModelConfig
+func sherpaOnnxOnlineTransducerModelConfig(
+  encoder: String,
+  decoder: String,
+  joiner: String,
+  tokens: String,
+  numThreads: Int = 2,
+  debug: Int = 0
+) -> SherpaOnnxOnlineTransducerModelConfig{
+  return SherpaOnnxOnlineTransducerModelConfig(
+    encoder: toCPointer(encoder),
+    decoder: toCPointer(decoder),
+    joiner: toCPointer(joiner),
+    tokens: toCPointer(tokens),
+    num_threads: Int32(numThreads),
+    debug: Int32(debug)
+  )
+}
+
+func sherpaOnnxFeatureConfig(
+  sampleRate: Int = 16000,
+  featureDim: Int = 80
+) -> SherpaOnnxFeatureConfig {
+  return SherpaOnnxFeatureConfig(
+    sample_rate: Int32(sampleRate),
+    feature_dim: Int32(featureDim))
+}
+
+func sherpaOnnxOnlineRecognizerConfig(
+    featConfig: SherpaOnnxFeatureConfig,
+    modelConfig: SherpaOnnxOnlineTransducerModelConfig,
+    enableEndpoint: Bool = false,
+    rule1MinTrailingSilence: Float = 2.4,
+    rule2MinTrailingSilence: Float = 1.2,
+    rule3MinUtteranceLength: Float = 30
+) ->  SherpaOnnxOnlineRecognizerConfig{
+  return SherpaOnnxOnlineRecognizerConfig(
+    feat_config: featConfig,
+    model_config: modelConfig,
+    enable_endpoint: enableEndpoint ? 1 : 0,
+    rule1_min_trailing_silence: rule1MinTrailingSilence,
+    rule2_min_trailing_silence: rule2MinTrailingSilence,
+    rule3_min_utterance_length: rule3MinUtteranceLength)
+}
+
+/// Wrapper for recognition result.
+///
+/// Usage:
+///
+///  let result = recognizer.getResult()
+///  print("text: \(result.text)")
+///
+class SherpaOnnxOnlineRecongitionResult {
+  /// A pointer to the underlying counterpart in C
+  let result: UnsafePointer<SherpaOnnxOnlineRecognizerResult>!
+
+  /// Return the actual recognition result.
+  /// For English models, it contains words separated by spaces.
+  /// For Chinese models, it contains Chinese words.
+  var text: String {
+    return String(cString: result.pointee.text)
+  }
+
+  init(result: UnsafePointer<SherpaOnnxOnlineRecognizerResult>!) {
+    self.result = result
+  }
+
+  deinit {
+    if let result {
+      DestroyOnlineRecognizerResult(result)
+    }
+  }
+}
+
+class SherpaOnnxRecognizer {
+  /// A pointer to the underlying counterpart in C
+  let recognizer: OpaquePointer!
+  let stream: OpaquePointer!
+
+  /// Constructor taking a model config and a decoder config.
+  init(
+    config: UnsafePointer<SherpaOnnxOnlineRecognizerConfig>!
+  ) {
+    recognizer = CreateOnlineRecognizer(config)
+    stream = CreateOnlineStream(recognizer)
+  }
+
+  deinit {
+    if let stream {
+      DestoryOnlineStream(stream)
+    }
+
+    if let recognizer {
+      DestroyOnlineRecognizer(recognizer)
+    }
+  }
+
+  /// Decode wave samples.
+  ///
+  /// - Parameters:
+  ///   - samples: Audio samples normalzed to the range [-1, 1]
+  ///   - sampleRate: Sample rate of the input audio samples. Must match
+  ///                 the one expected by the model. It must be 16000 for
+  ///                 models from icefall.
+  func acceptWaveform(samples: [Float], sampleRate: Float = 16000) {
+    AcceptWaveform(stream, sampleRate, samples, Int32(samples.count))
+  }
+
+  func isReady() -> Bool {
+    return IsOnlineStreamReady(recognizer, stream) == 1 ? true : false
+  }
+
+  /// If there are enough number of feature frames, it invokes the neural
+  /// network computation and decoding. Otherwise, it is a no-op.
+  func decode() {
+    DecodeOnlineStream(recognizer, stream)
+  }
+
+  /// Get the decoding results so far
+  func getResult() -> SherpaOnnxOnlineRecongitionResult {
+    let result: UnsafeMutablePointer<SherpaOnnxOnlineRecognizerResult>? = GetOnlineStreamResult(recognizer, stream)
+    return SherpaOnnxOnlineRecongitionResult(result: result)
+  }
+
+  /// Reset the recognizer, which clears the neural network model state
+  /// and the state for decoding.
+  func reset() {
+    Reset(recognizer, stream)
+  }
+
+  /// Signal that no more audio samples would be available.
+  /// After this call, you cannot call acceptWaveform() any more.
+  func inputFinished() {
+    InputFinished(stream)
+  }
+
+  /// Return true is an endpoint has been detected.
+  func isEndpoint() -> Bool {
+    return IsEndpoint(recognizer, stream) == 1 ? true : false
+  }
+}

swift-api-examples/decode-file.swift

@@ -0,0 +1,74 @@
+import AVFoundation
+
+extension AudioBuffer {
+  func array() -> [Float] {
+    return Array(UnsafeBufferPointer(self))
+  }
+}
+
+extension AVAudioPCMBuffer {
+  func array() -> [Float] {
+    return self.audioBufferList.pointee.mBuffers.array()
+  }
+}
+
+func run() {
+  let encoder = "./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/encoder-epoch-99-avg-1.onnx"
+  let decoder = "./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/decoder-epoch-99-avg-1.onnx"
+  let joiner = "./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/joiner-epoch-99-avg-1.onnx"
+  let tokens = "./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt"
+
+  let modelConfig = sherpaOnnxOnlineTransducerModelConfig(
+    encoder: encoder,
+    decoder: decoder,
+    joiner: joiner,
+    tokens: tokens,
+    numThreads: 2)
+
+  let featConfig = sherpaOnnxFeatureConfig(
+    sampleRate: 16000,
+    featureDim: 80
+  )
+  var config = sherpaOnnxOnlineRecognizerConfig(
+      featConfig: featConfig,
+      modelConfig: modelConfig,
+      enableEndpoint: false
+  )
+
+
+  let recognizer = SherpaOnnxRecognizer(config: &config)
+
+  let filePath = "./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/test_wavs/1.wav"
+  let fileURL: NSURL = NSURL(fileURLWithPath: filePath)
+  let audioFile = try! AVAudioFile(forReading: fileURL as URL)
+
+  let audioFormat = audioFile.processingFormat
+  assert(audioFormat.sampleRate == 16000)
+  assert(audioFormat.channelCount == 1)
+  assert(audioFormat.commonFormat == AVAudioCommonFormat.pcmFormatFloat32)
+
+  let audioFrameCount = UInt32(audioFile.length)
+  let audioFileBuffer = AVAudioPCMBuffer(pcmFormat: audioFormat, frameCapacity: audioFrameCount)
+
+  try! audioFile.read(into: audioFileBuffer!)
+  let array: [Float]! = audioFileBuffer?.array()
+  recognizer.acceptWaveform(samples: array)
+
+  let tailPadding = [Float](repeating: 0.0, count: 3200)
+  recognizer.acceptWaveform(samples: tailPadding)
+
+  recognizer.inputFinished()
+  while (recognizer.isReady()) {
+    recognizer.decode()
+  }
+
+  let result = recognizer.getResult()
+  print("\nresult is:\n\(result.text)")
+}
+
+@main
+struct App {
+  static func main() {
+    run()
+  }
+}

swift-api-examples/run-decode-file.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+
+set -ex
+
+if [ ! -d ../build-swift-macos ]; then
+  echo "Please run ../build-swift-macos.sh first!"
+  exit 1
+fi
+
+if [ ! -d ./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20 ]; then
+  echo "Please download the pre-trained model for testing."
+  echo "You can refer to"
+  echo ""
+  echo "https://k2-fsa.github.io/sherpa/onnx/pretrained_models/zipformer-transducer-models.html#sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20-bilingual-chinese-english"
+  echo ""
+  echo "for help"
+  exit 1
+fi
+
+if [ ! -e ./decode-file ]; then
+  # Note: We use -lc++ to link against libc++ instead of libstdc++
+  swiftc \
+    -lc++ \
+    -I ../build-swift-macos/install/include \
+    -import-objc-header ./SherpaOnnx-Bridging-Header.h \
+    ./decode-file.swift  ./SherpaOnnx.swift \
+    -L ../build-swift-macos/install/lib/ \
+    -l sherpa-onnx \
+    -l onnxruntime \
+    -o decode-file
+else
+  echo "./decode-file exists - skip building"
+fi
+
+export DYLD_LIBRARY_PATH=$PWD/../build-swift-macos/install/lib:$DYLD_LIBRARY_PATH
+./decode-file

toolchains/ios.toolchain.cmake

@@ -0,0 +1,927 @@
+# This file is part of the ios-cmake project. It was retrieved from
+# https://github.com/leetal/ios-cmake.git, which is a fork of
+# https://github.com/gerstrong/ios-cmake.git, which is a fork of
+# https://github.com/cristeab/ios-cmake.git, which is a fork of
+# https://code.google.com/p/ios-cmake/. Which in turn is based off of
+# the Platform/Darwin.cmake and Platform/UnixPaths.cmake files which
+# are included with CMake 2.8.4
+#
+# The ios-cmake project is licensed under the new BSD license.
+#
+# Copyright (c) 2014, Bogdan Cristea and LTE Engineering Software,
+# Kitware, Inc., Insight Software Consortium.  All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+# This file is based off of the Platform/Darwin.cmake and
+# Platform/UnixPaths.cmake files which are included with CMake 2.8.4
+# It has been altered for iOS development.
+#
+# Updated by Alex Stewart (alexs.mac@gmail.com)
+#
+# *****************************************************************************
+#      Now maintained by Alexander Widerberg (widerbergaren [at] gmail.com)
+#                      under the BSD-3-Clause license
+#                   https://github.com/leetal/ios-cmake
+# *****************************************************************************
+#
+#                           INFORMATION / HELP
+#
+# The following options control the behaviour of this toolchain:
+#
+# PLATFORM: (default "OS64")
+#    OS = Build for iPhoneOS.
+#    OS64 = Build for arm64 iphoneOS.
+#    OS64COMBINED = Build for arm64 x86_64 iphoneOS. Combined into FAT STATIC lib (supported on 3.14+ of CMakewith "-G Xcode" argument ONLY)
+#    SIMULATOR = Build for x86 i386 iphoneOS Simulator.
+#    SIMULATOR64 = Build for x86_64 iphoneOS Simulator.
+#    SIMULATORARM64 = Build for arm64 iphoneOS Simulator.
+#    TVOS = Build for arm64 tvOS.
+#    TVOSCOMBINED = Build for arm64 x86_64 tvOS. Combined into FAT STATIC lib (supported on 3.14+ of CMake with "-G Xcode" argument ONLY)
+#    SIMULATOR_TVOS = Build for x86_64 tvOS Simulator.
+#    WATCHOS = Build for armv7k arm64_32 for watchOS.
+#    WATCHOSCOMBINED = Build for armv7k arm64_32 x86_64 watchOS. Combined into FAT STATIC lib (supported on 3.14+ of CMake with "-G Xcode" argument ONLY)
+#    SIMULATOR_WATCHOS = Build for x86_64 for watchOS Simulator.
+#    MAC = Build for x86_64 macOS.
+#    MAC_ARM64 = Build for Apple Silicon macOS.
+#    MAC_CATALYST = Build for x86_64 macOS with Catalyst support (iOS toolchain on macOS).
+#                   Note: The build argument "MACOSX_DEPLOYMENT_TARGET" can be used to control min-version of macOS
+#    MAC_CATALYST_ARM64 = Build for Apple Silicon macOS with Catalyst support (iOS toolchain on macOS).
+#                         Note: The build argument "MACOSX_DEPLOYMENT_TARGET" can be used to control min-version of macOS
+#
+# CMAKE_OSX_SYSROOT: Path to the SDK to use.  By default this is
+#    automatically determined from PLATFORM and xcodebuild, but
+#    can also be manually specified (although this should not be required).
+#
+# CMAKE_DEVELOPER_ROOT: Path to the Developer directory for the platform
+#    being compiled for.  By default this is automatically determined from
+#    CMAKE_OSX_SYSROOT, but can also be manually specified (although this should
+#    not be required).
+#
+# DEPLOYMENT_TARGET: Minimum SDK version to target. Default 2.0 on watchOS and 9.0 on tvOS+iOS
+#
+# ENABLE_BITCODE: (1|0) Enables or disables bitcode support. Default 1 (true)
+#
+# ENABLE_ARC: (1|0) Enables or disables ARC support. Default 1 (true, ARC enabled by default)
+#
+# ENABLE_VISIBILITY: (1|0) Enables or disables symbol visibility support. Default 0 (false, visibility hidden by default)
+#
+# ENABLE_STRICT_TRY_COMPILE: (1|0) Enables or disables strict try_compile() on all Check* directives (will run linker
+#    to actually check if linking is possible). Default 0 (false, will set CMAKE_TRY_COMPILE_TARGET_TYPE to STATIC_LIBRARY)
+#
+# ARCHS: (armv7 armv7s armv7k arm64 arm64_32 i386 x86_64) If specified, will override the default architectures for the given PLATFORM
+#    OS = armv7 armv7s arm64 (if applicable)
+#    OS64 = arm64 (if applicable)
+#    SIMULATOR = i386
+#    SIMULATOR64 = x86_64
+#    SIMULATORARM64 = arm64
+#    TVOS = arm64
+#    SIMULATOR_TVOS = x86_64 (i386 has since long been deprecated)
+#    WATCHOS = armv7k arm64_32 (if applicable)
+#    SIMULATOR_WATCHOS = x86_64 (i386 has since long been deprecated)
+#    MAC = x86_64
+#    MAC_ARM64 = arm64
+#    MAC_CATALYST = x86_64
+#    MAC_CATALYST_ARM64 = arm64
+#
+# This toolchain defines the following properties (available via get_property()) for use externally:
+#
+# PLATFORM: The currently targeted platform.
+# XCODE_VERSION: Version number (not including Build version) of Xcode detected.
+# SDK_VERSION: Version of SDK being used.
+# OSX_ARCHITECTURES: Architectures being compiled for (generated from PLATFORM).
+# APPLE_TARGET_TRIPLE: Used by autoconf build systems. NOTE: If "ARCHS" are overridden, this will *NOT* be set!
+#
+# This toolchain defines the following macros for use externally:
+#
+# set_xcode_property (TARGET XCODE_PROPERTY XCODE_VALUE XCODE_VARIANT)
+#   A convenience macro for setting xcode specific properties on targets.
+#   Available variants are: All, Release, RelWithDebInfo, Debug, MinSizeRel
+#   example: set_xcode_property (myioslib IPHONEOS_DEPLOYMENT_TARGET "3.1" "all").
+#
+# find_host_package (PROGRAM ARGS)
+#   A macro used to find executable programs on the host system, not within the
+#   environment. Thanks to the android-cmake project for providing the
+#   command.
+#
+
+cmake_minimum_required(VERSION 3.8.0)
+
+# CMake invokes the toolchain file twice during the first build, but only once during subsequent rebuilds.
+if(IOS_TOOLCHAIN_HAS_RUN)
+  return()
+endif(IOS_TOOLCHAIN_HAS_RUN)
+set(IOS_TOOLCHAIN_HAS_RUN true)
+
+###############################################################################
+#                                  OPTIONS                                    #
+###############################################################################
+
+option(DROP_32_BIT "Drops the 32-bit targets universally." YES)
+
+###############################################################################
+#                                END OPTIONS                                  #
+###############################################################################
+
+# List of supported platform values
+list(APPEND _supported_platforms
+        "OS" "OS64" "OS64COMBINED" "SIMULATOR" "SIMULATOR64" "SIMULATORARM64"
+        "TVOS" "TVOSCOMBINED" "SIMULATOR_TVOS"
+        "WATCHOS" "WATCHOSCOMBINED" "SIMULATOR_WATCHOS"
+        "MAC" "MAC_ARM64"
+        "MAC_CATALYST" "MAC_CATALYST_ARM64")
+
+# Cache what generator is used
+set(USED_CMAKE_GENERATOR "${CMAKE_GENERATOR}")
+
+# Check if using a CMake version capable of building combined FAT builds (simulator and target slices combined in one static lib)
+if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.14")
+  set(MODERN_CMAKE YES)
+endif()
+
+# Get the Xcode version being used.
+# Problem: CMake runs toolchain files multiple times, but can't read cache variables on some runs.
+# Workaround: On first run (in which cache variables are always accessible), set an intermediary environment variable.
+#
+# NOTE: This pattern is used i many places in this toolchain to speed up checks of all sorts
+if(DEFINED XCODE_VERSION_INT)
+  # Environment variables are always preserved.
+  set(ENV{_XCODE_VERSION_INT} "${XCODE_VERSION_INT}")
+elseif(DEFINED ENV{_XCODE_VERSION_INT})
+  set(XCODE_VERSION_INT "$ENV{_XCODE_VERSION_INT}")
+elseif(NOT DEFINED XCODE_VERSION_INT)
+  find_program(XCODEBUILD_EXECUTABLE xcodebuild)
+  if(NOT XCODEBUILD_EXECUTABLE)
+    message(FATAL_ERROR "xcodebuild not found. Please install either the standalone commandline tools or Xcode.")
+  endif()
+  execute_process(COMMAND ${XCODEBUILD_EXECUTABLE} -version
+          OUTPUT_VARIABLE XCODE_VERSION_INT
+          ERROR_QUIET
+          OUTPUT_STRIP_TRAILING_WHITESPACE)
+  string(REGEX MATCH "Xcode [0-9\\.]+" XCODE_VERSION_INT "${XCODE_VERSION_INT}")
+  string(REGEX REPLACE "Xcode ([0-9\\.]+)" "\\1" XCODE_VERSION_INT "${XCODE_VERSION_INT}")
+  set(XCODE_VERSION_INT "${XCODE_VERSION_INT}" CACHE INTERNAL "")
+endif()
+
+# Assuming that xcode 12.0 is installed you most probably have ios sdk 14.0 or later installed (tested on Big Sur)
+# if you don't set a deployment target it will be set the way you only get 64-bit builds
+if(NOT DEFINED DEPLOYMENT_TARGET AND XCODE_VERSION_INT VERSION_GREATER 12.0)
+  # Temporarily fix the arm64 issues in CMake install-combined by excluding arm64 for simulator builds (needed for Apple Silicon...)
+  set(CMAKE_XCODE_ATTRIBUTE_EXCLUDED_ARCHS[sdk=iphonesimulator*] "arm64")
+endif()
+
+# Check if the platform variable is set
+if(DEFINED PLATFORM)
+  # Environment variables are always preserved.
+  set(ENV{_PLATFORM} "${PLATFORM}")
+elseif(DEFINED ENV{_PLATFORM})
+  set(PLATFORM "$ENV{_PLATFORM}")
+elseif(NOT DEFINED PLATFORM)
+  message(FATAL_ERROR "PLATFORM argument not set. Bailing configure since I don't know what target you want to build for!")
+endif ()
+
+# Safeguard that the platform value is set and is one of the supported values
+list(FIND _supported_platforms ${PLATFORM} contains_PLATFORM)
+if("${contains_PLATFORM}" EQUAL "-1")
+  string(REPLACE ";"  "\n * " _supported_platforms_formatted "${_supported_platforms}")
+  message(FATAL_ERROR " Invalid PLATFORM specified! Current value: ${PLATFORM}.\n"
+          " Supported PLATFORM values: \n * ${_supported_platforms_formatted}")
+endif()
+
+# Check if Apple Silicon is supported
+if(PLATFORM MATCHES "^(MAC_ARM64)$|^(MAC_CATALYST_ARM64)$" AND ${CMAKE_VERSION} VERSION_LESS "3.19.5")
+  message(FATAL_ERROR "Apple Silicon builds requires a minimum of CMake 3.19.5")
+endif()
+
+# Touch toolchain variable to suppress "unused variable" warning.
+# This happens if CMake is invoked with the same command line the second time.
+if(CMAKE_TOOLCHAIN_FILE)
+endif()
+
+# Fix for PThread library not in path
+set(CMAKE_THREAD_LIBS_INIT "-lpthread")
+set(CMAKE_HAVE_THREADS_LIBRARY 1)
+set(CMAKE_USE_WIN32_THREADS_INIT 0)
+set(CMAKE_USE_PTHREADS_INIT 1)
+
+# Specify minimum version of deployment target.
+if(NOT DEFINED DEPLOYMENT_TARGET)
+  if (PLATFORM MATCHES "WATCHOS")
+    # Unless specified, SDK version 4.0 is used by default as minimum target version (watchOS).
+    set(DEPLOYMENT_TARGET "4.0")
+  elseif(PLATFORM STREQUAL "MAC")
+    # Unless specified, SDK version 10.13 (High sierra) is used by default as minimum target version (macos).
+    set(DEPLOYMENT_TARGET "10.13")
+  elseif(PLATFORM STREQUAL "MAC_ARM64")
+    # Unless specified, SDK version 11.0 (Big Sur) is used by default as minimum target version (macos on arm).
+    set(DEPLOYMENT_TARGET "11.0")
+  elseif(PLATFORM STREQUAL "MAC_CATALYST" OR PLATFORM STREQUAL "MAC_CATALYST_ARM64")
+    # Unless specified, SDK version 13.0 is used by default as minimum target version (mac catalyst minimum requirement).
+    set(DEPLOYMENT_TARGET "13.0")
+  else()
+    # Unless specified, SDK version 11.0 is used by default as minimum target version (iOS, tvOS).
+    set(DEPLOYMENT_TARGET "11.0")
+  endif()
+  message(STATUS "[DEFAULTS] Using the default min-version since DEPLOYMENT_TARGET not provided!")
+elseif(DEFINED DEPLOYMENT_TARGET AND PLATFORM STREQUAL "MAC_CATALYST" AND ${DEPLOYMENT_TARGET} VERSION_LESS "13.0")
+  message(FATAL_ERROR "Mac Catalyst builds requires a minimum deployment target of 13.0!")
+endif()
+
+# Store the DEPLOYMENT_TARGET in the cache
+set(DEPLOYMENT_TARGET "${DEPLOYMENT_TARGET}" CACHE INTERNAL "")
+
+# Handle the case where we are targeting iOS and a version above 10.3.4 (32-bit support dropped officially)
+if(PLATFORM STREQUAL "OS" AND DEPLOYMENT_TARGET VERSION_GREATER_EQUAL 10.3.4)
+  set(PLATFORM "OS64")
+  message(STATUS "Targeting minimum SDK version ${DEPLOYMENT_TARGET}. Dropping 32-bit support.")
+elseif(PLATFORM STREQUAL "SIMULATOR" AND DEPLOYMENT_TARGET VERSION_GREATER_EQUAL 10.3.4)
+  set(PLATFORM "SIMULATOR64")
+  message(STATUS "Targeting minimum SDK version ${DEPLOYMENT_TARGET}. Dropping 32-bit support.")
+endif()
+
+set(PLATFORM_INT "${PLATFORM}")
+
+if(DEFINED ARCHS)
+  string(REPLACE ";" "-" ARCHS_SPLIT "${ARCHS}")
+endif()
+
+# Determine the platform name and architectures for use in xcodebuild commands
+# from the specified PLATFORM_INT name.
+if(PLATFORM_INT STREQUAL "OS")
+  set(SDK_NAME iphoneos)
+  if(NOT ARCHS)
+    set(ARCHS armv7 armv7s arm64)
+    set(APPLE_TARGET_TRIPLE_INT arm-apple-ios)
+  endif()
+elseif(PLATFORM_INT STREQUAL "OS64")
+  set(SDK_NAME iphoneos)
+  if(NOT ARCHS)
+    if (XCODE_VERSION_INT VERSION_GREATER 10.0)
+      set(ARCHS arm64) # Add arm64e when Apple have fixed the integration issues with it, libarclite_iphoneos.a is currently missung bitcode markers for example
+    else()
+      set(ARCHS arm64)
+    endif()
+    set(APPLE_TARGET_TRIPLE_INT aarch64-apple-ios)
+  else()
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-ios)
+  endif()
+elseif(PLATFORM_INT STREQUAL "OS64COMBINED")
+  set(SDK_NAME iphoneos)
+  if(MODERN_CMAKE)
+    if(NOT ARCHS)
+      if (XCODE_VERSION_INT VERSION_GREATER 10.0)
+        set(ARCHS arm64 x86_64) # Add arm64e when Apple have fixed the integration issues with it, libarclite_iphoneos.a is currently missung bitcode markers for example
+        set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=iphoneos*] "arm64")
+        set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=iphonesimulator*] "x86_64")
+        set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=iphoneos*] "arm64")
+        set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=iphonesimulator*] "x86_64")
+      else()
+        set(ARCHS arm64 x86_64)
+        set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=iphoneos*] "arm64")
+        set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=iphonesimulator*] "x86_64")
+        set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=iphoneos*] "arm64")
+        set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=iphonesimulator*] "x86_64")
+      endif()
+      set(APPLE_TARGET_TRIPLE_INT aarch64-x86_64-apple-ios)
+    else()
+      set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-ios)
+    endif()
+  else()
+    message(FATAL_ERROR "Please make sure that you are running CMake 3.14+ to make the OS64COMBINED setting work")
+  endif()
+elseif(PLATFORM_INT STREQUAL "SIMULATOR")
+  set(SDK_NAME iphonesimulator)
+  if(NOT ARCHS)
+    set(ARCHS i386)
+    set(APPLE_TARGET_TRIPLE_INT i386-apple-ios)
+  else()
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-ios)
+  endif()
+  message(DEPRECATION "SIMULATOR IS DEPRECATED. Consider using SIMULATOR64 instead.")
+elseif(PLATFORM_INT STREQUAL "SIMULATOR64")
+  set(SDK_NAME iphonesimulator)
+  if(NOT ARCHS)
+    set(ARCHS x86_64)
+    set(APPLE_TARGET_TRIPLE_INT x86_64-apple-ios)
+  else()
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-ios)
+  endif()
+elseif(PLATFORM_INT STREQUAL "SIMULATORARM64")
+  set(SDK_NAME iphonesimulator)
+  if(NOT ARCHS)
+    set(ARCHS arm64)
+    set(APPLE_TARGET_TRIPLE_INT aarch64-apple-ios)
+  else()
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-ios)
+  endif()
+elseif(PLATFORM_INT STREQUAL "TVOS")
+  set(SDK_NAME appletvos)
+  if(NOT ARCHS)
+    set(ARCHS arm64)
+    set(APPLE_TARGET_TRIPLE_INT aarch64-apple-tvos)
+  else()
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-tvos)
+  endif()
+elseif (PLATFORM_INT STREQUAL "TVOSCOMBINED")
+  set(SDK_NAME appletvos)
+  if(MODERN_CMAKE)
+    if(NOT ARCHS)
+      set(ARCHS arm64 x86_64)
+      set(APPLE_TARGET_TRIPLE_INT aarch64-x86_64-apple-tvos)
+      set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=appletvos*] "arm64")
+      set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=appletvsimulator*] "x86_64")
+      set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=appletvos*] "arm64")
+      set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=appletvsimulator*] "x86_64")
+    else()
+      set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-tvos)
+    endif()
+  else()
+    message(FATAL_ERROR "Please make sure that you are running CMake 3.14+ to make the TVOSCOMBINED setting work")
+  endif()
+elseif(PLATFORM_INT STREQUAL "SIMULATOR_TVOS")
+  set(SDK_NAME appletvsimulator)
+  if(NOT ARCHS)
+    set(ARCHS x86_64)
+    set(APPLE_TARGET_TRIPLE_INT x86_64-apple-tvos)
+  else()
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-tvos)
+  endif()
+elseif(PLATFORM_INT STREQUAL "WATCHOS")
+  set(SDK_NAME watchos)
+  if(NOT ARCHS)
+    if (XCODE_VERSION_INT VERSION_GREATER 10.0)
+      set(ARCHS armv7k arm64_32)
+      set(APPLE_TARGET_TRIPLE_INT aarch64_32-apple-watchos)
+    else()
+      set(ARCHS armv7k)
+      set(APPLE_TARGET_TRIPLE_INT arm-apple-watchos)
+    endif()
+  else()
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-watchos)
+  endif()
+elseif(PLATFORM_INT STREQUAL "WATCHOSCOMBINED")
+  set(SDK_NAME watchos)
+  if(MODERN_CMAKE)
+    if(NOT ARCHS)
+      if (XCODE_VERSION_INT VERSION_GREATER 10.0)
+        set(ARCHS armv7k arm64_32 i386)
+        set(APPLE_TARGET_TRIPLE_INT aarch64_32-i386-apple-watchos)
+        set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=watchos*] "armv7k arm64_32")
+        set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=watchsimulator*] "i386")
+        set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=watchos*] "armv7k arm64_32")
+        set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=watchsimulator*] "i386")
+      else()
+        set(ARCHS armv7k i386)
+        set(APPLE_TARGET_TRIPLE_INT arm-i386-apple-watchos)
+        set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=watchos*] "armv7k")
+        set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=watchsimulator*] "i386")
+        set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=watchos*] "armv7k")
+        set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=watchsimulator*] "i386")
+      endif()
+    else()
+      set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-watchos)
+    endif()
+  else()
+    message(FATAL_ERROR "Please make sure that you are running CMake 3.14+ to make the WATCHOSCOMBINED setting work")
+  endif()
+elseif(PLATFORM_INT STREQUAL "SIMULATOR_WATCHOS")
+  set(SDK_NAME watchsimulator)
+  if(NOT ARCHS)
+    set(ARCHS i386)
+    set(APPLE_TARGET_TRIPLE_INT i386-apple-watchos)
+  else()
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-watchos)
+  endif()
+elseif(PLATFORM_INT STREQUAL "MAC" OR PLATFORM_INT STREQUAL "MAC_CATALYST")
+  set(SDK_NAME macosx)
+  if(NOT ARCHS)
+    set(ARCHS x86_64)
+  endif()
+  string(REPLACE ";" "-" ARCHS_SPLIT "${ARCHS}")
+  if(PLATFORM_INT STREQUAL "MAC")
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-macosx)
+  elseif(PLATFORM_INT STREQUAL "MAC_CATALYST")
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-ios${DEPLOYMENT_TARGET}-macabi)
+  endif()
+elseif(PLATFORM_INT MATCHES "^(MAC_ARM64)$|^(MAC_CATALYST_ARM64)$")
+  set(SDK_NAME macosx)
+  if(NOT ARCHS)
+    set(ARCHS arm64)
+  endif()
+  string(REPLACE ";" "-" ARCHS_SPLIT "${ARCHS}")
+  if(PLATFORM_INT STREQUAL "MAC_ARM64")
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-macosx)
+  elseif(PLATFORM_INT STREQUAL "MAC_CATALYST_ARM64")
+    set(APPLE_TARGET_TRIPLE_INT ${ARCHS_SPLIT}-apple-ios${DEPLOYMENT_TARGET}-macabi)
+  endif()
+else()
+  message(FATAL_ERROR "Invalid PLATFORM: ${PLATFORM_INT}")
+endif()
+
+if(MODERN_CMAKE AND PLATFORM_INT MATCHES ".*COMBINED" AND NOT CMAKE_GENERATOR MATCHES "Xcode")
+  message(FATAL_ERROR "The COMBINED options only work with Xcode generator, -G Xcode")
+endif()
+
+if(CMAKE_GENERATOR MATCHES "Xcode" AND PLATFORM_INT MATCHES "MAC_CATALYST_.*")
+  set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LIBRARY "libc++")
+  set(CMAKE_XCODE_ATTRIBUTE_SUPPORTED_PLATFORMS "macosx")
+  set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-maccatalyst")
+  if(NOT DEFINED MACOSX_DEPLOYMENT_TARGET)
+    set(CMAKE_XCODE_ATTRIBUTE_MACOSX_DEPLOYMENT_TARGET "10.15")
+  else()
+    set(CMAKE_XCODE_ATTRIBUTE_MACOSX_DEPLOYMENT_TARGET "${MACOSX_DEPLOYMENT_TARGET}")
+  endif()
+elseif(CMAKE_GENERATOR MATCHES "Xcode")
+  set(CMAKE_XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET "${DEPLOYMENT_TARGET}")
+  if(NOT PLATFORM_INT MATCHES ".*COMBINED")
+    set(CMAKE_XCODE_ATTRIBUTE_ARCHS[sdk=${SDK_NAME}*] "${ARCHS}")
+    set(CMAKE_XCODE_ATTRIBUTE_VALID_ARCHS[sdk=${SDK_NAME}*] "${ARCHS}")
+  endif()
+endif()
+
+# If user did not specify the SDK root to use, then query xcodebuild for it.
+if(DEFINED CMAKE_OSX_SYSROOT_INT)
+  # Environment variables are always preserved.
+  set(ENV{_CMAKE_OSX_SYSROOT_INT} "${CMAKE_OSX_SYSROOT_INT}")
+elseif(DEFINED ENV{_CMAKE_OSX_SYSROOT_INT})
+  set(CMAKE_OSX_SYSROOT_INT "$ENV{_CMAKE_OSX_SYSROOT_INT}")
+elseif(NOT DEFINED CMAKE_OSX_SYSROOT_INT)
+  execute_process(COMMAND ${XCODEBUILD_EXECUTABLE} -version -sdk ${SDK_NAME} Path
+          OUTPUT_VARIABLE CMAKE_OSX_SYSROOT_INT
+          ERROR_QUIET
+          OUTPUT_STRIP_TRAILING_WHITESPACE)
+endif()
+
+if (NOT DEFINED CMAKE_OSX_SYSROOT_INT AND NOT DEFINED CMAKE_OSX_SYSROOT)
+  message(SEND_ERROR "Please make sure that Xcode is installed and that the toolchain"
+          "is pointing to the correct path. Please run:"
+          "sudo xcode-select -s /Applications/Xcode.app/Contents/Developer"
+          "and see if that fixes the problem for you.")
+  message(FATAL_ERROR "Invalid CMAKE_OSX_SYSROOT: ${CMAKE_OSX_SYSROOT} "
+          "does not exist.")
+elseif(DEFINED CMAKE_OSX_SYSROOT_INT)
+  set(CMAKE_OSX_SYSROOT_INT "${CMAKE_OSX_SYSROOT_INT}" CACHE INTERNAL "")
+  # Specify the location or name of the platform SDK to be used in CMAKE_OSX_SYSROOT.
+  set(CMAKE_OSX_SYSROOT "${CMAKE_OSX_SYSROOT_INT}" CACHE INTERNAL "")
+endif()
+
+# Use bitcode or not
+if(NOT DEFINED ENABLE_BITCODE AND NOT ARCHS MATCHES "((^|;|, )(i386|x86_64))+")
+  # Unless specified, enable bitcode support by default
+  message(STATUS "[DEFAULTS] Enabling bitcode support by default. ENABLE_BITCODE not provided!")
+  set(ENABLE_BITCODE TRUE)
+elseif(NOT DEFINED ENABLE_BITCODE)
+  message(STATUS "[DEFAULTS] Disabling bitcode support by default on simulators. ENABLE_BITCODE not provided for override!")
+  set(ENABLE_BITCODE FALSE)
+endif()
+set(ENABLE_BITCODE_INT ${ENABLE_BITCODE} CACHE BOOL
+        "Whether or not to enable bitcode" FORCE)
+# Use ARC or not
+if(NOT DEFINED ENABLE_ARC)
+  # Unless specified, enable ARC support by default
+  set(ENABLE_ARC TRUE)
+  message(STATUS "[DEFAULTS] Enabling ARC support by default. ENABLE_ARC not provided!")
+endif()
+set(ENABLE_ARC_INT ${ENABLE_ARC} CACHE BOOL "Whether or not to enable ARC" FORCE)
+# Use hidden visibility or not
+if(NOT DEFINED ENABLE_VISIBILITY)
+  # Unless specified, disable symbols visibility by default
+  set(ENABLE_VISIBILITY FALSE)
+  message(STATUS "[DEFAULTS] Hiding symbols visibility by default. ENABLE_VISIBILITY not provided!")
+endif()
+set(ENABLE_VISIBILITY_INT ${ENABLE_VISIBILITY} CACHE BOOL "Whether or not to hide symbols from the dynamic linker (-fvisibility=hidden)" FORCE)
+# Set strict compiler checks or not
+if(NOT DEFINED ENABLE_STRICT_TRY_COMPILE)
+  # Unless specified, disable strict try_compile()
+  set(ENABLE_STRICT_TRY_COMPILE FALSE)
+  message(STATUS "[DEFAULTS] Using NON-strict compiler checks by default. ENABLE_STRICT_TRY_COMPILE not provided!")
+endif()
+set(ENABLE_STRICT_TRY_COMPILE_INT ${ENABLE_STRICT_TRY_COMPILE} CACHE BOOL
+        "Whether or not to use strict compiler checks" FORCE)
+
+# Get the SDK version information.
+if(DEFINED SDK_VERSION)
+  # Environment variables are always preserved.
+  set(ENV{_SDK_VERSION} "${SDK_VERSION}")
+elseif(DEFINED ENV{_SDK_VERSION})
+  set(SDK_VERSION "$ENV{_SDK_VERSION}")
+elseif(NOT DEFINED SDK_VERSION)
+  execute_process(COMMAND ${XCODEBUILD_EXECUTABLE} -sdk ${CMAKE_OSX_SYSROOT_INT} -version SDKVersion
+          OUTPUT_VARIABLE SDK_VERSION
+          ERROR_QUIET
+          OUTPUT_STRIP_TRAILING_WHITESPACE)
+endif()
+
+# Find the Developer root for the specific iOS platform being compiled for
+# from CMAKE_OSX_SYSROOT.  Should be ../../ from SDK specified in
+# CMAKE_OSX_SYSROOT. There does not appear to be a direct way to obtain
+# this information from xcrun or xcodebuild.
+if (NOT DEFINED CMAKE_DEVELOPER_ROOT AND NOT CMAKE_GENERATOR MATCHES "Xcode")
+  get_filename_component(PLATFORM_SDK_DIR ${CMAKE_OSX_SYSROOT_INT} PATH)
+  get_filename_component(CMAKE_DEVELOPER_ROOT ${PLATFORM_SDK_DIR} PATH)
+  if (NOT EXISTS "${CMAKE_DEVELOPER_ROOT}")
+    message(FATAL_ERROR "Invalid CMAKE_DEVELOPER_ROOT: ${CMAKE_DEVELOPER_ROOT} does not exist.")
+  endif()
+endif()
+
+# Find the C & C++ compilers for the specified SDK.
+if(DEFINED CMAKE_C_COMPILER)
+  # Environment variables are always preserved.
+  set(ENV{_CMAKE_C_COMPILER} "${CMAKE_C_COMPILER}")
+elseif(DEFINED ENV{_CMAKE_C_COMPILER})
+  set(CMAKE_C_COMPILER "$ENV{_CMAKE_C_COMPILER}")
+elseif(NOT DEFINED CMAKE_C_COMPILER)
+  execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT_INT} -find clang
+          OUTPUT_VARIABLE CMAKE_C_COMPILER
+          ERROR_QUIET
+          OUTPUT_STRIP_TRAILING_WHITESPACE)
+endif()
+if(DEFINED CMAKE_CXX_COMPILER)
+  # Environment variables are always preserved.
+  set(ENV{_CMAKE_CXX_COMPILER} "${CMAKE_CXX_COMPILER}")
+elseif(DEFINED ENV{_CMAKE_CXX_COMPILER})
+  set(CMAKE_CXX_COMPILER "$ENV{_CMAKE_CXX_COMPILER}")
+elseif(NOT DEFINED CMAKE_CXX_COMPILER)
+  execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT_INT} -find clang++
+          OUTPUT_VARIABLE CMAKE_CXX_COMPILER
+          ERROR_QUIET
+          OUTPUT_STRIP_TRAILING_WHITESPACE)
+endif()
+# Find (Apple's) libtool.
+if(DEFINED BUILD_LIBTOOL)
+  # Environment variables are always preserved.
+  set(ENV{_BUILD_LIBTOOL} "${BUILD_LIBTOOL}")
+elseif(DEFINED ENV{_BUILD_LIBTOOL})
+  set(BUILD_LIBTOOL "$ENV{_BUILD_LIBTOOL}")
+elseif(NOT DEFINED BUILD_LIBTOOL)
+  execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT_INT} -find libtool
+          OUTPUT_VARIABLE BUILD_LIBTOOL
+          ERROR_QUIET
+          OUTPUT_STRIP_TRAILING_WHITESPACE)
+endif()
+# Find the toolchain's provided install_name_tool if none is found on the host
+if(DEFINED CMAKE_INSTALL_NAME_TOOL)
+  # Environment variables are always preserved.
+  set(ENV{_CMAKE_INSTALL_NAME_TOOL} "${CMAKE_INSTALL_NAME_TOOL}")
+elseif(DEFINED ENV{_CMAKE_INSTALL_NAME_TOOL})
+  set(CMAKE_INSTALL_NAME_TOOL "$ENV{_CMAKE_INSTALL_NAME_TOOL}")
+elseif(NOT DEFINED CMAKE_INSTALL_NAME_TOOL)
+  execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT_INT} -find install_name_tool
+          OUTPUT_VARIABLE CMAKE_INSTALL_NAME_TOOL_INT
+          ERROR_QUIET
+          OUTPUT_STRIP_TRAILING_WHITESPACE)
+  set(CMAKE_INSTALL_NAME_TOOL ${CMAKE_INSTALL_NAME_TOOL_INT} CACHE INTERNAL "")
+endif()
+
+# Configure libtool to be used instead of ar + ranlib to build static libraries.
+# This is required on Xcode 7+, but should also work on previous versions of
+# Xcode.
+get_property(languages GLOBAL PROPERTY ENABLED_LANGUAGES)
+foreach(lang ${languages})
+  set(CMAKE_${lang}_CREATE_STATIC_LIBRARY "${BUILD_LIBTOOL} -static -o <TARGET> <LINK_FLAGS> <OBJECTS> " CACHE INTERNAL "")
+endforeach()
+
+# CMake 3.14+ support building for iOS, watchOS and tvOS out of the box.
+if(MODERN_CMAKE)
+  if(SDK_NAME MATCHES "iphone")
+    set(CMAKE_SYSTEM_NAME iOS)
+  elseif(SDK_NAME MATCHES "macosx")
+    set(CMAKE_SYSTEM_NAME Darwin)
+  elseif(SDK_NAME MATCHES "appletv")
+    set(CMAKE_SYSTEM_NAME tvOS)
+  elseif(SDK_NAME MATCHES "watch")
+    set(CMAKE_SYSTEM_NAME watchOS)
+  endif()
+  # Provide flags for a combined FAT library build on newer CMake versions
+  if(PLATFORM_INT MATCHES ".*COMBINED")
+    set(CMAKE_XCODE_ATTRIBUTE_ONLY_ACTIVE_ARCH "NO")
+    set(CMAKE_IOS_INSTALL_COMBINED YES)
+    message(STATUS "Will combine built (static) artifacts into FAT lib...")
+  endif()
+elseif(NOT DEFINED CMAKE_SYSTEM_NAME AND ${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.10")
+  # Legacy code path prior to CMake 3.14 or fallback if no CMAKE_SYSTEM_NAME specified
+  set(CMAKE_SYSTEM_NAME iOS)
+elseif(NOT DEFINED CMAKE_SYSTEM_NAME)
+  # Legacy code path prior to CMake 3.14 or fallback if no CMAKE_SYSTEM_NAME specified
+  set(CMAKE_SYSTEM_NAME Darwin)
+endif()
+# Standard settings.
+set(CMAKE_SYSTEM_VERSION ${SDK_VERSION} CACHE INTERNAL "")
+set(UNIX TRUE CACHE BOOL "")
+set(APPLE TRUE CACHE BOOL "")
+if(PLATFORM STREQUAL "MAC" OR PLATFORM STREQUAL "MAC_ARM64")
+  set(IOS FALSE CACHE BOOL "")
+  set(MACOS TRUE CACHE BOOL "")
+elseif(PLATFORM STREQUAL "MAC_CATALYST" OR PLATFORM STREQUAL "MAC_CATALYST_ARM64")
+  set(IOS TRUE CACHE BOOL "")
+  set(MACOS TRUE CACHE BOOL "")
+else()
+  set(IOS TRUE CACHE BOOL "")
+endif()
+set(CMAKE_AR ar CACHE FILEPATH "" FORCE)
+set(CMAKE_RANLIB ranlib CACHE FILEPATH "" FORCE)
+set(CMAKE_STRIP strip CACHE FILEPATH "" FORCE)
+# Set the architectures for which to build.
+set(CMAKE_OSX_ARCHITECTURES ${ARCHS} CACHE INTERNAL "")
+# Change the type of target generated for try_compile() so it'll work when cross-compiling, weak compiler checks
+if(NOT ENABLE_STRICT_TRY_COMPILE_INT)
+  set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+endif()
+# All iOS/Darwin specific settings - some may be redundant.
+set(CMAKE_MACOSX_BUNDLE YES)
+set(CMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_REQUIRED "NO")
+set(CMAKE_SHARED_LIBRARY_PREFIX "lib")
+set(CMAKE_SHARED_LIBRARY_SUFFIX ".dylib")
+set(CMAKE_SHARED_MODULE_PREFIX "lib")
+set(CMAKE_SHARED_MODULE_SUFFIX ".so")
+set(CMAKE_C_COMPILER_ABI ELF)
+set(CMAKE_CXX_COMPILER_ABI ELF)
+set(CMAKE_C_HAS_ISYSROOT 1)
+set(CMAKE_CXX_HAS_ISYSROOT 1)
+set(CMAKE_MODULE_EXISTS 1)
+set(CMAKE_DL_LIBS "")
+set(CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ")
+set(CMAKE_C_OSX_CURRENT_VERSION_FLAG "-current_version ")
+set(CMAKE_CXX_OSX_COMPATIBILITY_VERSION_FLAG "${CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG}")
+set(CMAKE_CXX_OSX_CURRENT_VERSION_FLAG "${CMAKE_C_OSX_CURRENT_VERSION_FLAG}")
+
+if(ARCHS MATCHES "((^|;|, )(arm64|arm64e|x86_64))+")
+  set(CMAKE_C_SIZEOF_DATA_PTR 8)
+  set(CMAKE_CXX_SIZEOF_DATA_PTR 8)
+  if(ARCHS MATCHES "((^|;|, )(arm64|arm64e))+")
+    set(CMAKE_SYSTEM_PROCESSOR "aarch64")
+  else()
+    set(CMAKE_SYSTEM_PROCESSOR "x86_64")
+  endif()
+else()
+  set(CMAKE_C_SIZEOF_DATA_PTR 4)
+  set(CMAKE_CXX_SIZEOF_DATA_PTR 4)
+  set(CMAKE_SYSTEM_PROCESSOR "arm")
+endif()
+
+# Note that only Xcode 7+ supports the newer more specific:
+# -m${SDK_NAME}-version-min flags, older versions of Xcode use:
+# -m(ios/ios-simulator)-version-min instead.
+if(${CMAKE_VERSION} VERSION_LESS "3.11")
+  if(PLATFORM_INT STREQUAL "OS" OR PLATFORM_INT STREQUAL "OS64")
+    if(XCODE_VERSION_INT VERSION_LESS 7.0)
+      set(SDK_NAME_VERSION_FLAGS
+              "-mios-version-min=${DEPLOYMENT_TARGET}")
+    else()
+      # Xcode 7.0+ uses flags we can build directly from SDK_NAME.
+      set(SDK_NAME_VERSION_FLAGS
+              "-m${SDK_NAME}-version-min=${DEPLOYMENT_TARGET}")
+    endif()
+  elseif(PLATFORM_INT STREQUAL "TVOS")
+    set(SDK_NAME_VERSION_FLAGS
+            "-mtvos-version-min=${DEPLOYMENT_TARGET}")
+  elseif(PLATFORM_INT STREQUAL "SIMULATOR_TVOS")
+    set(SDK_NAME_VERSION_FLAGS
+            "-mtvos-simulator-version-min=${DEPLOYMENT_TARGET}")
+  elseif(PLATFORM_INT STREQUAL "WATCHOS")
+    set(SDK_NAME_VERSION_FLAGS
+            "-mwatchos-version-min=${DEPLOYMENT_TARGET}")
+  elseif(PLATFORM_INT STREQUAL "SIMULATOR_WATCHOS")
+    set(SDK_NAME_VERSION_FLAGS
+            "-mwatchos-simulator-version-min=${DEPLOYMENT_TARGET}")
+  elseif(PLATFORM_INT STREQUAL "MAC")
+    set(SDK_NAME_VERSION_FLAGS
+            "-mmacosx-version-min=${DEPLOYMENT_TARGET}")
+  else()
+    # SIMULATOR or SIMULATOR64 both use -mios-simulator-version-min.
+    set(SDK_NAME_VERSION_FLAGS
+            "-mios-simulator-version-min=${DEPLOYMENT_TARGET}")
+  endif()
+elseif(NOT PLATFORM_INT STREQUAL "MAC_CATALYST")
+  # Newer versions of CMake sets the version min flags correctly, skip this for Mac Catalyst targets
+  set(CMAKE_OSX_DEPLOYMENT_TARGET ${DEPLOYMENT_TARGET})
+endif()
+
+if(DEFINED APPLE_TARGET_TRIPLE_INT)
+  set(APPLE_TARGET_TRIPLE ${APPLE_TARGET_TRIPLE_INT} CACHE INTERNAL "")
+endif()
+
+if(PLATFORM_INT STREQUAL "MAC_CATALYST")
+  set(C_TARGET_FLAGS "-target ${APPLE_TARGET_TRIPLE_INT} -isystem ${CMAKE_OSX_SYSROOT_INT}/System/iOSSupport/usr/include")
+endif()
+
+if(ENABLE_BITCODE_INT)
+  set(BITCODE "-fembed-bitcode")
+  set(CMAKE_XCODE_ATTRIBUTE_BITCODE_GENERATION_MODE "bitcode")
+  set(CMAKE_XCODE_ATTRIBUTE_ENABLE_BITCODE "YES")
+else()
+  set(BITCODE "")
+  set(CMAKE_XCODE_ATTRIBUTE_ENABLE_BITCODE "NO")
+endif()
+
+if(ENABLE_ARC_INT)
+  set(FOBJC_ARC "-fobjc-arc")
+  set(CMAKE_XCODE_ATTRIBUTE_CLANG_ENABLE_OBJC_ARC "YES")
+else()
+  set(FOBJC_ARC "-fno-objc-arc")
+  set(CMAKE_XCODE_ATTRIBUTE_CLANG_ENABLE_OBJC_ARC "NO")
+endif()
+
+if(NOT ENABLE_VISIBILITY_INT)
+  foreach(lang ${languages})
+    set(CMAKE_${lang}_VISIBILITY_PRESET "hidden" CACHE INTERNAL "")
+  endforeach()
+  set(CMAKE_XCODE_ATTRIBUTE_GCC_SYMBOLS_PRIVATE_EXTERN "YES")
+  set(VISIBILITY "-fvisibility=hidden -fvisibility-inlines-hidden")
+else()
+  foreach(lang ${languages})
+    set(CMAKE_${lang}_VISIBILITY_PRESET "default" CACHE INTERNAL "")
+  endforeach()
+  set(CMAKE_XCODE_ATTRIBUTE_GCC_SYMBOLS_PRIVATE_EXTERN "NO")
+  set(VISIBILITY "-fvisibility=default")
+endif()
+
+#Check if Xcode generator is used, since that will handle these flags automagically
+if(CMAKE_GENERATOR MATCHES "Xcode")
+  message(STATUS "Not setting any manual command-line buildflags, since Xcode is selected as generator.")
+else()
+  # Hidden visibility is required for C++ on iOS.
+  set(CMAKE_C_FLAGS "${C_TARGET_FLAGS} ${SDK_NAME_VERSION_FLAGS} ${BITCODE} -fobjc-abi-version=2 ${FOBJC_ARC} ${CMAKE_C_FLAGS}")
+  set(CMAKE_CXX_FLAGS "${C_TARGET_FLAGS} ${SDK_NAME_VERSION_FLAGS} ${BITCODE} ${VISIBILITY} -fobjc-abi-version=2 ${FOBJC_ARC} ${CMAKE_CXX_FLAGS}")
+  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS} -O0 -g ${CMAKE_CXX_FLAGS_DEBUG}")
+  set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS} -DNDEBUG -Os -ffast-math ${CMAKE_CXX_FLAGS_MINSIZEREL}")
+  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS} -DNDEBUG -O2 -g -ffast-math ${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
+  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS} -DNDEBUG -O3 -ffast-math ${CMAKE_CXX_FLAGS_RELEASE}")
+  set(CMAKE_C_LINK_FLAGS "${C_TARGET_FLAGS} ${SDK_NAME_VERSION_FLAGS} -Wl,-search_paths_first ${CMAKE_C_LINK_FLAGS}")
+  set(CMAKE_CXX_LINK_FLAGS "${C_TARGET_FLAGS} ${SDK_NAME_VERSION_FLAGS}  -Wl,-search_paths_first ${CMAKE_CXX_LINK_FLAGS}")
+  set(CMAKE_ASM_FLAGS "${CMAKE_C_FLAGS} -x assembler-with-cpp -arch ${CMAKE_OSX_ARCHITECTURES}")
+endif()
+
+## Print status messages to inform of the current state
+message(STATUS "Configuring ${SDK_NAME} build for platform: ${PLATFORM_INT}, architecture(s): ${ARCHS}")
+message(STATUS "Using SDK: ${CMAKE_OSX_SYSROOT_INT}")
+message(STATUS "Using C compiler: ${CMAKE_C_COMPILER}")
+message(STATUS "Using CXX compiler: ${CMAKE_CXX_COMPILER}")
+message(STATUS "Using libtool: ${BUILD_LIBTOOL}")
+message(STATUS "Using install name tool: ${CMAKE_INSTALL_NAME_TOOL}")
+if(DEFINED APPLE_TARGET_TRIPLE)
+  message(STATUS "Autoconf target triple: ${APPLE_TARGET_TRIPLE}")
+endif()
+message(STATUS "Using minimum deployment version: ${DEPLOYMENT_TARGET}"
+        " (SDK version: ${SDK_VERSION})")
+if(MODERN_CMAKE)
+  message(STATUS "Merging integrated CMake 3.14+ iOS,tvOS,watchOS,macOS toolchain(s) with this toolchain!")
+endif()
+if(CMAKE_GENERATOR MATCHES "Xcode")
+  message(STATUS "Using Xcode version: ${XCODE_VERSION_INT}")
+endif()
+message(STATUS "CMake version: ${CMAKE_VERSION}")
+if(DEFINED SDK_NAME_VERSION_FLAGS)
+  message(STATUS "Using version flags: ${SDK_NAME_VERSION_FLAGS}")
+endif()
+message(STATUS "Using a data_ptr size of: ${CMAKE_CXX_SIZEOF_DATA_PTR}")
+if(ENABLE_BITCODE_INT)
+  message(STATUS "Bitcode: Enabled")
+else()
+  message(STATUS "Bitcode: Disabled")
+endif()
+
+if(ENABLE_ARC_INT)
+  message(STATUS "ARC: Enabled")
+else()
+  message(STATUS "ARC: Disabled")
+endif()
+
+if(ENABLE_VISIBILITY_INT)
+  message(STATUS "Hiding symbols: Disabled")
+else()
+  message(STATUS "Hiding symbols: Enabled")
+endif()
+
+# Set global properties
+set_property(GLOBAL PROPERTY PLATFORM "${PLATFORM}")
+set_property(GLOBAL PROPERTY APPLE_TARGET_TRIPLE "${APPLE_TARGET_TRIPLE_INT}")
+set_property(GLOBAL PROPERTY SDK_VERSION "${SDK_VERSION}")
+set_property(GLOBAL PROPERTY XCODE_VERSION "${XCODE_VERSION_INT}")
+set_property(GLOBAL PROPERTY OSX_ARCHITECTURES "${CMAKE_OSX_ARCHITECTURES}")
+
+# Export configurable variables for the try_compile() command.
+set(CMAKE_TRY_COMPILE_PLATFORM_VARIABLES
+        PLATFORM
+        XCODE_VERSION_INT
+        SDK_VERSION
+        DEPLOYMENT_TARGET
+        CMAKE_DEVELOPER_ROOT
+        CMAKE_OSX_SYSROOT_INT
+        ENABLE_BITCODE
+        ENABLE_ARC
+        CMAKE_C_COMPILER
+        CMAKE_CXX_COMPILER
+        BUILD_LIBTOOL
+        CMAKE_INSTALL_NAME_TOOL
+        CMAKE_C_FLAGS
+        CMAKE_CXX_FLAGS
+        CMAKE_CXX_FLAGS_DEBUG
+        CMAKE_CXX_FLAGS_MINSIZEREL
+        CMAKE_CXX_FLAGS_RELWITHDEBINFO
+        CMAKE_CXX_FLAGS_RELEASE
+        CMAKE_C_LINK_FLAGS
+        CMAKE_CXX_LINK_FLAGS
+        CMAKE_ASM_FLAGS
+        )
+
+set(CMAKE_PLATFORM_HAS_INSTALLNAME 1)
+set(CMAKE_SHARED_LINKER_FLAGS "-rpath @executable_path/Frameworks -rpath @loader_path/Frameworks")
+set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-dynamiclib -Wl,-headerpad_max_install_names")
+set(CMAKE_SHARED_MODULE_CREATE_C_FLAGS "-bundle -Wl,-headerpad_max_install_names")
+set(CMAKE_SHARED_MODULE_LOADER_C_FLAG "-Wl,-bundle_loader,")
+set(CMAKE_SHARED_MODULE_LOADER_CXX_FLAG "-Wl,-bundle_loader,")
+set(CMAKE_FIND_LIBRARY_SUFFIXES ".tbd" ".dylib" ".so" ".a")
+set(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-install_name")
+
+# Set the find root to the SDK developer roots.
+# Note: CMAKE_FIND_ROOT_PATH is only useful when cross-compiling. Thus, do not set on macOS builds.
+if(NOT PLATFORM_INT STREQUAL "MAC" AND NOT PLATFORM_INT STREQUAL "MAC_ARM64")
+  list(APPEND CMAKE_FIND_ROOT_PATH "${CMAKE_OSX_SYSROOT_INT}" CACHE INTERNAL "")
+  set(CMAKE_IGNORE_PATH "/System/Library/Frameworks;/usr/local/lib" CACHE INTERNAL "")
+endif()
+
+# Default to searching for frameworks first.
+set(CMAKE_FIND_FRAMEWORK FIRST)
+
+# Set up the default search directories for frameworks.
+if(PLATFORM_INT MATCHES "MAC_CATALYST.*")
+  set(CMAKE_FRAMEWORK_PATH
+          ${CMAKE_DEVELOPER_ROOT}/Library/PrivateFrameworks
+          ${CMAKE_OSX_SYSROOT_INT}/System/Library/Frameworks
+          ${CMAKE_OSX_SYSROOT_INT}/System/iOSSupport/System/Library/Frameworks
+          ${CMAKE_FRAMEWORK_PATH} CACHE INTERNAL "")
+else()
+  set(CMAKE_FRAMEWORK_PATH
+          ${CMAKE_DEVELOPER_ROOT}/Library/PrivateFrameworks
+          ${CMAKE_OSX_SYSROOT_INT}/System/Library/Frameworks
+          ${CMAKE_FRAMEWORK_PATH} CACHE INTERNAL "")
+endif()
+
+# By default, search both the specified iOS SDK and the remainder of the host filesystem.
+if(NOT CMAKE_FIND_ROOT_PATH_MODE_PROGRAM)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM BOTH CACHE INTERNAL "")
+endif()
+if(NOT CMAKE_FIND_ROOT_PATH_MODE_LIBRARY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY BOTH CACHE INTERNAL "")
+endif()
+if(NOT CMAKE_FIND_ROOT_PATH_MODE_INCLUDE)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH CACHE INTERNAL "")
+endif()
+if(NOT CMAKE_FIND_ROOT_PATH_MODE_PACKAGE)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE BOTH CACHE INTERNAL "")
+endif()
+
+#
+# Some helper-macros below to simplify and beautify the CMakeFile
+#
+
+# This little macro lets you set any Xcode specific property.
+macro(set_xcode_property TARGET XCODE_PROPERTY XCODE_VALUE XCODE_RELVERSION)
+  set(XCODE_RELVERSION_I "${XCODE_RELVERSION}")
+  if(XCODE_RELVERSION_I STREQUAL "All")
+    set_property(TARGET ${TARGET} PROPERTY XCODE_ATTRIBUTE_${XCODE_PROPERTY} "${XCODE_VALUE}")
+  else()
+    set_property(TARGET ${TARGET} PROPERTY XCODE_ATTRIBUTE_${XCODE_PROPERTY}[variant=${XCODE_RELVERSION_I}] "${XCODE_VALUE}")
+  endif()
+endmacro(set_xcode_property)
+
+# This macro lets you find executable programs on the host system.
+macro(find_host_package)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE NEVER)
+  set(_TOOLCHAIN_IOS ${IOS})
+  set(IOS FALSE)
+  find_package(${ARGN})
+  set(IOS ${_TOOLCHAIN_IOS})
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM BOTH)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY BOTH)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE BOTH)
+endmacro(find_host_package)