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/lib/whisper/model/uri.rb

@@ -130,6 +130,44 @@ module Whisper
       end
     end
 
+    class ZipURI < URI
+      def cache
+        zip_path = Pathname(super)
+        dest = unzipped_path
+        return if dest.exist? && dest.mtime >= zip_path.mtime
+        escaping dest do
+          system "unzip", "-q", "-d", zip_path.dirname.to_path, zip_path.to_path, exception: true
+        end
+        zip_path.to_path
+      end
+
+      def clear_cache
+        super
+        unzipped_path.rmtree if unzipped_path.exist?
+      end
+
+      private
+
+      def unzipped_path
+        cache_path.sub_ext("")
+      end
+
+      def escaping(path)
+        escaped = Pathname("#{path}.removing")
+        if path.exist?
+          escaped.rmtree if escaped.exist?
+          path.rename escaped
+        end
+        yield
+      ensure
+        if path.exist?
+          escaped.rmtree if escaped.exist?
+        else
+          escaped.rename path if escaped.exist?
+        end
+      end
+    end
+
     @pre_converted_models = %w[
       tiny
       tiny.en
@@ -171,8 +209,25 @@ module Whisper
       @pre_converted_models[name] = URI.new("https://huggingface.co/ggml-org/whisper-vad/resolve/main/ggml-#{name}.bin")
     end
 
+    @coreml_compiled_models = %w[
+      tiny
+      tiny.en
+      base
+      base.en
+      small
+      small.en
+      medium
+      medium.en
+      large-v1
+      large-v2
+      large-v3
+      large-v3-turbo
+    ].each_with_object({}) do |name, models|
+      models[@pre_converted_models[name]] = ZipURI.new("https://huggingface.co/ggerganov/whisper.cpp/resolve/main/ggml-#{name}-encoder.mlmodelc.zip")
+    end
+
     class << self
-      attr_reader :pre_converted_models
+      attr_reader :pre_converted_models, :coreml_compiled_models
     end
   end
 end