ruby : add Core ML support (#3214)

* Prevent overflow

* Fix memsize of Whisper::Context

* Rename xxx_initialize to more Ruby-esque name: xxx_s_new

* Define Whisper::Model::ZipURI

* Define Whisper::Model.coreml_compiled_models

* Make Options' @cmake_options Hash

* Use --{enable,disable}-whisper-coreml option for -I/opt/homebrew/opt/llvm/include

* Prepare Core ML model if enabled

* Add test for ZipURI

* Add signatures for ZipURI

* Add Whisper.system_info_str

* Add test for Whisper.system_info_str

* Add signagure for Model.coreml_compiled_models

* Add signature for Whisper.system_info_str

* Add test for Core ML

* Update date

* Maintain .gitignore

bindings/ruby/tests/test_model.rb

@@ -106,4 +106,13 @@ class TestModel < TestBase
     assert_equal 1, model.ftype
     assert_equal "base", model.type
   end
+
+  def test_coreml_model_auto_download
+    uri = Whisper::Model.coreml_compiled_models[Whisper::Model.pre_converted_models["tiny"]]
+    model_path = Pathname(uri.to_path).sub_ext("")
+    model_path.rmtree if model_path.exist?
+
+    uri.cache
+    assert_path_exist model_path
+  end
 end

bindings/ruby/tests/test_package.rb

@@ -25,6 +25,20 @@ class TestPackage < TestBase
       end
     end
 
+    def test_install_with_coreml
+      omit_unless RUBY_PLATFORM.match?(/darwin/) do
+        gemspec = Gem::Specification.load("whispercpp.gemspec")
+        Dir.mktmpdir do |dir|
+          system "gem", "install", "--install-dir", dir.shellescape, "--no-document", "pkg/#{gemspec.file_name.shellescape}", "--", "--enable-whisper-coreml", exception: true
+          assert_installed dir, gemspec.version
+          assert_nothing_raised do
+            libdir = File.join(dir, "gems", "#{gemspec.name}-#{gemspec.version}", "lib")
+            system "ruby", "-I", libdir, "-r", "whisper", "-e", "Whisper::Context.new('tiny')", exception: true
+          end
+        end
+      end
+    end
+
     private
 
     def assert_installed(dir, version)

bindings/ruby/tests/test_whisper.rb

@@ -94,6 +94,10 @@ class TestWhisper < TestBase
     end
   end
 
+  def test_system_info_str
+    assert_match /\AWHISPER : COREML = \d | OPENVINO = \d |/, Whisper.system_info_str
+  end
+
   def test_log_set
     user_data = Object.new
     logs = []