Expose a device name parameter to wave_open.

src/libespeak-ng/speak_lib.c

 					sleep(1);
 				}
 				out_samplerate = voice_samplerate;
-				my_audio = wave_open(voice_samplerate);
+				my_audio = wave_open(voice_samplerate, NULL);
 				if (!my_audio) {
 					err = EE_INTERNAL_ERROR;
 					return -1;

src/libespeak-ng/wave.c

 static int pulse_running;
 
 // wave.cpp (this file)
-void *wave_port_open(int);
+void *wave_port_open(int, const char *);
 size_t wave_port_write(void *theHandler, char *theMono16BitsWaveBuffer, size_t theSize);
 int wave_port_close(void *theHandler);
 int wave_port_is_busy(void *theHandler);
 
 // wave_pulse.cpp
 int is_pulse_running();
-void *wave_pulse_open(int);
+void *wave_pulse_open(int, const char *);
 size_t wave_pulse_write(void *theHandler, char *theMono16BitsWaveBuffer, size_t theSize);
 int wave_pulse_close(void *theHandler);
 int wave_pulse_is_busy(void *theHandler);
 int wave_pulse_get_remaining_time(uint32_t sample, uint32_t *time);
 
 // wrappers
-void *wave_open(int srate)
+void *wave_open(int srate, const char *device)
 {
 	if (pulse_running)
-		return wave_pulse_open(srate);
+		return wave_pulse_open(srate, device);
 	else
-		return wave_port_open(srate);
+		return wave_port_open(srate, device);
 }
 
 size_t wave_write(void *theHandler, char *theMono16BitsWaveBuffer, size_t theSize)
 	my_callback_is_output_enabled = cb;
 }
 
-void *wave_open(int srate)
+void *wave_open(int srate, const char *device)
 {
+	(void)device; // unused
+
 	PaError err;
 
 	pa_stream = NULL;
 
 #else
 
-void *wave_open(int srate)
+void *wave_open(int srate, const char *device)
 {
 	(void)srate; // unused
+	(void)device; // unused
 
 	return (void *)1;
 }

src/libespeak-ng/wave.h

 
 extern int option_device_number;
 
-extern void *wave_open(int samplerate);
-
+extern void *wave_open(int samplerate, const char *device);
 extern size_t wave_write(void *theHandler, char *theMono16BitsWaveBuffer, size_t theSize);
 extern int wave_close(void *theHandler);
 extern void wave_flush(void *theHandler);

src/libespeak-ng/wave_pulse.c

 	my_callback_is_output_enabled = cb;
 }
 
-void *wave_open(int srate)
+void *wave_open(int srate, const char *device)
 {
+	(void)device; // unused
+
 	stream = NULL;
 	wave_samplerate = srate;
 
 
 #else
 
-void *wave_open(int srate)
+void *wave_open(int srate, const char *device)
 {
 	(void)srate; // unused
+	(void)device; // unused
 
 	return (void *)1;
 }

src/libespeak-ng/wave_sada.c

 // sun_audio_fd: modified to hold the file descriptor of the opened
 // audio device.
 //
-void *wave_open(int srate)
+void *wave_open(int srate, const char *device)
 {
+	(void)device; // unused
+
 	audio_info_t ainfo;
 	char *audio_device = NULL;
 
 
 #else
 
-void *wave_open(int srate)
+void *wave_open(int srate, const char *device)
 {
 	(void)srate; // unused
+	(void)device; // unused
 
 	return (void *)1;
 }