ruby : Add ruby binding for max_len (#3365)

* add ruby binding for max_len

* add test, update param numbers

bindings/ruby/ext/ruby_whisper_params.c

@@ -26,7 +26,7 @@
   rb_define_method(cParams, #param_name, ruby_whisper_params_get_ ## param_name, 0); \
   rb_define_method(cParams, #param_name "=", ruby_whisper_params_set_ ## param_name, 1);
 
-#define RUBY_WHISPER_PARAMS_PARAM_NAMES_COUNT 35
+#define RUBY_WHISPER_PARAMS_PARAM_NAMES_COUNT 36
 
 extern VALUE cParams;
 extern VALUE cVADParams;
@@ -49,6 +49,7 @@ static ID id_print_timestamps;
 static ID id_suppress_blank;
 static ID id_suppress_nst;
 static ID id_token_timestamps;
+static ID id_max_len;
 static ID id_split_on_word;
 static ID id_initial_prompt;
 static ID id_diarize;
@@ -514,6 +515,33 @@ ruby_whisper_params_set_token_timestamps(VALUE self, VALUE value)
 {
   BOOL_PARAMS_SETTER(self, token_timestamps, value)
 }
+
+/*
+ * max segment length in characters.
+ *
+ * call-seq:
+ *   max_len -> Integer
+ */
+static VALUE
+ruby_whisper_params_get_max_len(VALUE self)
+{
+  ruby_whisper_params *rwp;
+  TypedData_Get_Struct(self, ruby_whisper_params, &ruby_whisper_params_type, rwp);
+  return INT2NUM(rwp->params.max_len);
+}
+/*
+ * call-seq:
+ *   max_len = length -> length
+ */
+static VALUE
+ruby_whisper_params_set_max_len(VALUE self, VALUE value)
+{
+  ruby_whisper_params *rwp;
+  TypedData_Get_Struct(self, ruby_whisper_params, &ruby_whisper_params_type, rwp);
+  rwp->params.max_len = NUM2INT(value);
+  return value;
+}
+
 /*
  * If true, split on word rather than on token (when used with max_len).
  *
@@ -1137,6 +1165,7 @@ ruby_whisper_params_initialize(int argc, VALUE *argv, VALUE self)
       SET_PARAM_IF_SAME(suppress_blank)
       SET_PARAM_IF_SAME(suppress_nst)
       SET_PARAM_IF_SAME(token_timestamps)
+      SET_PARAM_IF_SAME(max_len)
       SET_PARAM_IF_SAME(split_on_word)
       SET_PARAM_IF_SAME(initial_prompt)
       SET_PARAM_IF_SAME(offset)
@@ -1271,30 +1300,31 @@ init_ruby_whisper_params(VALUE *mWhisper)
   DEFINE_PARAM(suppress_blank, 8)
   DEFINE_PARAM(suppress_nst, 9)
   DEFINE_PARAM(token_timestamps, 10)
-  DEFINE_PARAM(split_on_word, 11)
-  DEFINE_PARAM(initial_prompt, 12)
-  DEFINE_PARAM(diarize, 13)
-  DEFINE_PARAM(offset, 14)
-  DEFINE_PARAM(duration, 15)
-  DEFINE_PARAM(max_text_tokens, 16)
-  DEFINE_PARAM(temperature, 17)
-  DEFINE_PARAM(max_initial_ts, 18)
-  DEFINE_PARAM(length_penalty, 19)
-  DEFINE_PARAM(temperature_inc, 20)
-  DEFINE_PARAM(entropy_thold, 21)
-  DEFINE_PARAM(logprob_thold, 22)
-  DEFINE_PARAM(no_speech_thold, 23)
-  DEFINE_PARAM(new_segment_callback, 24)
-  DEFINE_PARAM(new_segment_callback_user_data, 25)
-  DEFINE_PARAM(progress_callback, 26)
-  DEFINE_PARAM(progress_callback_user_data, 27)
-  DEFINE_PARAM(encoder_begin_callback, 28)
-  DEFINE_PARAM(encoder_begin_callback_user_data, 29)
-  DEFINE_PARAM(abort_callback, 30)
-  DEFINE_PARAM(abort_callback_user_data, 31)
-  DEFINE_PARAM(vad, 32)
-  DEFINE_PARAM(vad_model_path, 33)
-  DEFINE_PARAM(vad_params, 34)
+  DEFINE_PARAM(max_len, 11)
+  DEFINE_PARAM(split_on_word, 12)
+  DEFINE_PARAM(initial_prompt, 13)
+  DEFINE_PARAM(diarize, 14)
+  DEFINE_PARAM(offset, 15)
+  DEFINE_PARAM(duration, 16)
+  DEFINE_PARAM(max_text_tokens, 17)
+  DEFINE_PARAM(temperature, 18)
+  DEFINE_PARAM(max_initial_ts, 19)
+  DEFINE_PARAM(length_penalty, 20)
+  DEFINE_PARAM(temperature_inc, 21)
+  DEFINE_PARAM(entropy_thold, 22)
+  DEFINE_PARAM(logprob_thold, 23)
+  DEFINE_PARAM(no_speech_thold, 24)
+  DEFINE_PARAM(new_segment_callback, 25)
+  DEFINE_PARAM(new_segment_callback_user_data, 26)
+  DEFINE_PARAM(progress_callback, 27)
+  DEFINE_PARAM(progress_callback_user_data, 28)
+  DEFINE_PARAM(encoder_begin_callback, 29)
+  DEFINE_PARAM(encoder_begin_callback_user_data, 30)
+  DEFINE_PARAM(abort_callback, 31)
+  DEFINE_PARAM(abort_callback_user_data, 32)
+  DEFINE_PARAM(vad, 33)
+  DEFINE_PARAM(vad_model_path, 34)
+  DEFINE_PARAM(vad_params, 35)
 
   rb_define_method(cParams, "on_new_segment", ruby_whisper_params_on_new_segment, 0);
   rb_define_method(cParams, "on_progress", ruby_whisper_params_on_progress, 0);

bindings/ruby/sig/whisper.rbs

@@ -135,6 +135,7 @@ module Whisper
       ?suppress_blank: boolish,
       ?suppress_nst: boolish,
       ?token_timestamps: boolish,
+      ?max_len: Integer,
       ?split_on_word: boolish,
       ?initial_prompt: string | nil,
       ?diarize: boolish,
@@ -222,6 +223,12 @@ module Whisper
     #
     def token_timestamps: () -> (true | false)
 
+    def max_len=: (Integer) -> Integer
+
+    # max segment length in characters.
+    #
+    def max_len: () -> Integer
+
     def split_on_word=: (boolish) -> boolish
 
     # If true, split on word rather than on token (when used with max_len).

bindings/ruby/test/test_params.rb

@@ -13,6 +13,7 @@ class TestParams < TestBase
     :suppress_blank,
     :suppress_nst,
     :token_timestamps,
+    :max_len,
     :split_on_word,
     :initial_prompt,
     :diarize,
@@ -139,6 +140,13 @@ class TestParams < TestBase
     assert !@params.token_timestamps
   end
 
+  def test_max_len
+    @params.max_len = 42
+    assert_equal @params.max_len, 42
+    @params.max_len = 0
+    assert_equal @params.max_len, 0
+  end
+
   def test_split_on_word
     @params.split_on_word = true
     assert @params.split_on_word