Create an espeak-ng version of espeak_SetParameter.

src/include/espeak-ng/espeak_ng.h

 ESPEAK_NG_API int
 espeak_ng_GetSampleRate(void);
 
+ESPEAK_NG_API espeak_ng_STATUS
+espeak_ng_SetParameter(espeak_PARAMETER parameter,
+                       int value,
+                       int relative);
+
 ESPEAK_NG_API espeak_ng_STATUS
 espeak_ng_Synthesize(const void *text,
                      size_t size,

src/libespeak-ng/espeak_api.c

 	return status_to_espeak_error(espeak_ng_SpeakCharacter(character));
 }
 
+ESPEAK_API espeak_ERROR espeak_SetParameter(espeak_PARAMETER parameter, int value, int relative)
+{
+	return status_to_espeak_error(espeak_ng_SetParameter(parameter, value, relative));
+}
+
 ESPEAK_API void espeak_CompileDictionary(const char *path, FILE *log, int flags)
 {
 	espeak_ng_CompileDictionary(path, dictionary_name, log, flags);

src/libespeak-ng/espeak_command.h

 void sync_espeak_SetParameter(espeak_PARAMETER parameter, int value, int relative);
 int sync_espeak_SetVoiceByName(const char *name);
 int sync_espeak_SetVoiceByProperties(espeak_VOICE *voice_selector);
-void SetParameter(int parameter, int value, int relative);
+espeak_ng_STATUS SetParameter(int parameter, int value, int relative);
 
 int sync_espeak_terminated_msg(unsigned int unique_identifier, void *user_data);
 

src/libespeak-ng/setlengths.c

 
 #include "config.h"
 
+#include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <wctype.h>
 
 #endif
 
-void SetParameter(int parameter, int value, int relative)
+espeak_ng_STATUS SetParameter(int parameter, int value, int relative)
 {
 	// parameter: reset-all, amp, pitch, speed, linelength, expression, capitals, number grouping
 	// relative 0=absolute  1=relative
 		option_tone_flags = new_value;
 		break;
 	default:
-		break;
+		return EINVAL;
 	}
+	return ENS_OK;
 }
 
 static void DoEmbedded2(int *embix)

src/libespeak-ng/speech.c

 	return param_defaults[parameter];
 }
 
-ESPEAK_API espeak_ERROR espeak_SetParameter(espeak_PARAMETER parameter, int value, int relative)
+ESPEAK_NG_API espeak_ng_STATUS espeak_ng_SetParameter(espeak_PARAMETER parameter, int value, int relative)
 {
 #ifdef USE_ASYNC
-	espeak_ERROR a_error;
-
-	if (my_mode & ENOUTPUT_MODE_SYNCHRONOUS) {
-		SetParameter(parameter, value, relative);
-		return EE_OK;
-	}
+	if (my_mode & ENOUTPUT_MODE_SYNCHRONOUS)
+		return SetParameter(parameter, value, relative);
 
 	t_espeak_command *c = create_espeak_parameter(parameter, value, relative);
 
-	a_error = status_to_espeak_error(fifo_add_command(c));
-	if (a_error != EE_OK)
+	espeak_ng_STATUS status = fifo_add_command(c);
+	if (status != EE_OK)
 		delete_espeak_command(c);
-	return a_error;
+	return status;
 #else
-	SetParameter(parameter, value, relative);
-	return EE_OK;
+	return SetParameter(parameter, value, relative);
 #endif
 }
 

src/libespeak-ng/synthesize.h

 extern SOUND_ICON soundicon_tab[N_SOUNDICON_TAB];
 
 espeak_ERROR LoadMbrolaTable(const char *mbrola_voice, const char *phtrans, int *srate);
-void SetParameter(int parameter, int value, int relative);
+espeak_ng_STATUS SetParameter(int parameter, int value, int relative);
 int MbrolaTranslate(PHONEME_LIST *plist, int n_phonemes, int resume, FILE *f_mbrola);
 int MbrolaGenerate(PHONEME_LIST *phoneme_list, int *n_ph, int resume);
 int MbrolaFill(int length, int resume, int amplitude);