Add script to download ffi binaries. (#39)

* Add script to download ffi binaries.

* Remove built-in binaries.

* Added installation reminder for iOS.

README.md

@@ -24,10 +24,31 @@ We plan to support all Unity platforms with this SDK. WebGL is currently support
 
 ## Installation
 
-Follow this [unity tutorial](https://docs.unity3d.com/Manual/upm-ui-giturl.html) using the `https://github.com/livekit/client-sdk-unity.git` link.
-You can then directly import the samples into the package manager.
+Follow this [unity tutorial](https://docs.unity3d.com/Manual/upm-ui-giturl.html),
 
-This repo uses [Git LFS](https://git-lfs.com/), please ensure it's installed when cloning the repo.
+clone this repo and download the ffi binaries.
+
+```sh
+git clone https://github.com/livekit/client-sdk-unity.git
+cd client-sdk-unity
+python3 install.py
+```
+
+You can use the package manager to import `client-sdk-unity` into your Unity project.
+
+### iOS
+
+Add dependent frameworks to your Unity project
+
+select `Unity-iPhone` -> `TARGETS` -> `UnityFramework` -> `General` -> `Frameworks and Libraries` -> `+`
+
+add the following frameworks:
+
+`OpenGLES.framework` `MetalKit.framework`
+
+Since `libiPhone-lib.a` has built-in old versions of `celt` and `libvpx` (This will cause the opus and vp8/vp9 codecs to not be called correctly and cause a crash.), so you need to adjust the link order to ensure that it is linked to `liblivekit_ffi.a` first.
+
+The fix is ​​to remove and re-add `libiPhone-lib.a` from `Frameworks and Libraries`, making sure to link after `liblivekit_ffi.a`.
 
 ## Examples
 

install.py

@@ -0,0 +1,51 @@
+import os
+import urllib.request
+import configparser
+import zipfile
+
+# prepare progressbar
+def show_progress(block_num, block_size, total_size):
+    print(round(block_num * block_size / total_size *100,2), end="\r")
+
+platforms = ['android', 'ios', 'macos', 'linux', 'windows']
+download_dir = 'downloads~'
+
+def main():
+    config = configparser.ConfigParser()
+    config.read('version.ini')
+    version = config['ffi']['version']
+
+    for platform in platforms:
+        archs = ['arm64', 'x86_64']
+        if platform == 'android':
+            archs = [ 'armv7', 'arm64', 'x86_64']
+        elif platform == 'ios':
+            archs = ['arm64', 'sim-arm64']
+
+        for arch in archs:
+            filename = 'ffi-' + platform + '-' + arch + '.zip'
+            url = config['ffi']['url'] + '/ffi-' + version + '/' + filename
+            file_to_download = download_dir + '/' + filename
+            if download_file_if_not_exists(url, file_to_download) : 
+                dest = 'Runtime/Plugins' + '/ffi-' + platform + '-' + arch 
+                unzip_file(file_to_download, filename, dest)
+
+def download_file_if_not_exists(url, filename):
+    if os.path.isdir(download_dir) == False:
+        print( download_dir + " directory not exists, creating one...")
+        os.makedirs(download_dir)
+    if os.path.isfile(filename):
+        print("file " + filename + " exists, skipping download")
+        return False
+    print("downloading file " + url)
+    urllib.request.urlretrieve(url, filename, show_progress)
+    return True
+
+def unzip_file(srcfile, filename, dest):
+    print("unzipping " + filename + " to " + dest)
+    with zipfile.ZipFile(srcfile, 'r') as zip_ref:
+        zip_ref.extractall(dest)
+    print("unzipped " + srcfile)
+
+if __name__ == "__main__":
+    main()

version.ini

@@ -0,0 +1,3 @@
+[ffi]
+version = v0.5.0
+url = https://github.com/livekit/rust-sdks/releases/download