code cleanup: remove unused variables

this_ph_data, N_WAV_BUF, option.device, harm_sqrt_n,  max_hval, next_pause

src/libespeak-ng/speech.c

@@ -73,7 +73,6 @@ long count_samples;
 struct audio_object *my_audio = NULL;
 #endif
 
-static const char *option_device = NULL;
 static unsigned int my_unique_identifier = 0;
 static void *my_user_data = NULL;
 static espeak_ng_OUTPUT_MODE my_mode = ENOUTPUT_MODE_SYNCHRONOUS;
@@ -267,7 +266,6 @@ static int check_data_path(const char *path, int allow_directory)
 
 ESPEAK_NG_API espeak_ng_STATUS espeak_ng_InitializeOutput(espeak_ng_OUTPUT_MODE output_mode, int buffer_length, const char *device)
 {
-	option_device = device;
 	my_mode = output_mode;
 	out_samplerate = 0;
 

src/libespeak-ng/synthdata.c

@@ -421,8 +421,6 @@ void LoadConfig(void)
 	fclose(f);
 }
 
-PHONEME_DATA this_ph_data;
-
 static void InvalidInstn(PHONEME_TAB *ph, int instn)
 {
 	fprintf(stderr, "Invalid instruction %.4x for phoneme '%s'\n", instn, WordToString(ph->mnemonic));

src/libespeak-ng/synthesize.c

@@ -71,12 +71,8 @@ SOUND_ICON soundicon_tab[N_SOUNDICON_TAB];
 
 #define RMS_GLOTTAL1 35   // vowel before glottal stop
 #define RMS_START 28  // 28
-
 #define VOWEL_FRONT_LENGTH  50
 
-// a dummy phoneme_list entry which looks like a pause
-static PHONEME_LIST next_pause;
-
 const char *WordToString(unsigned int word)
 {
 	// Convert a phoneme mnemonic word into a string
@@ -95,10 +91,6 @@ void SynthesizeInit()
 	last_amp_cmd = 0;
 	last_frame = NULL;
 	syllable_centre = -1;
-
-	// initialise next_pause, a dummy phoneme_list entry
-	next_pause.type = phPAUSE;
-	next_pause.newword = 0;
 }
 
 static void EndAmplitude(void)

src/libespeak-ng/wavegen.c

@@ -46,8 +46,6 @@
 
 #include "sintab.h"
 
-#define N_WAV_BUF   10
-
 static void SetSynth(int length, int modn, frame_t *fr1, frame_t *fr2, voice_t *v);
 
 voice_t *wvoice = NULL;
@@ -77,15 +75,12 @@ static int echo_length = 0; // period (in sample\) to ensure completion of echo
 static int voicing;
 static RESONATOR rbreath[N_PEAKS];
 
-static int harm_sqrt_n = 0;
-
 #define N_LOWHARM  30
 #define MAX_HARMONIC 400 // 400 * 50Hz = 20 kHz, more than enough
 static int harm_inc[N_LOWHARM]; // only for these harmonics do we interpolate amplitude between steps
 static int *harmspect;
 static int hswitch = 0;
 static int hspect[2][MAX_HARMONIC]; // 2 copies, we interpolate between then
-static int max_hval = 0;
 
 static int nsamples = 0; // number to do
 static int modulation_type = 0;
@@ -339,7 +334,6 @@ void WavegenInit(int rate, int wavemult_fact)
 	samplecount = 0;
 	nsamples = 0;
 	wavephase = 0x7fffffff;
-	max_hval = 0;
 
 	wdata.amplitude = 32;
 	wdata.amplitude_fmt = 100;
@@ -1172,7 +1166,6 @@ static void SetSynth(int length, int modn, frame_t *fr1, frame_t *fr2, voice_t *
 	static int glottal_reduce_tab1[4] = { 0x30, 0x30, 0x40, 0x50 }; // vowel before [?], amp * 1/256
 	static int glottal_reduce_tab2[4] = { 0x90, 0xa0, 0xb0, 0xc0 }; // vowel after [?], amp * 1/256
 
-	harm_sqrt_n = 0;
 	end_wave = 1;
 
 	// any additional information in the param1 ?