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(sinc.c) Cleanup

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twinaphex 2015-06-26 17:33:15 +02:00
parent 9358114b9c
commit 7961d82e3c
1 changed files with 18 additions and 20 deletions
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14
audio/drivers_resampler/sinc.c
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@ -132,7 +132,6 @@ static INLINE double besseli0(double x)
{ {
unsigned i; unsigned i;
double sum = 0.0; double sum = 0.0;
double factorial = 1.0; double factorial = 1.0;
double factorial_mult = 0.0; double factorial_mult = 0.0;
double x_pow = 1.0; double x_pow = 1.0;
@ -174,10 +173,10 @@ static void init_sinc_table(rarch_sinc_resampler_t *resamp, double cutoff,
{ {
for (j = 0; j < taps; j++) for (j = 0; j < taps; j++)
{ {
double window_phase, sinc_phase; double sinc_phase;
float val; float val;
int n = j * phases + i; int n = j * phases + i;
window_phase = (double)n / (phases * taps); /* [0, 1). */ double window_phase = (double)n / (phases * taps); /* [0, 1). */
window_phase = 2.0 * window_phase - 1.0; /* [-1, 1) */ window_phase = 2.0 * window_phase - 1.0; /* [-1, 1) */
sinc_phase = sidelobes * window_phase; sinc_phase = sidelobes * window_phase;
@ -190,6 +189,7 @@ static void init_sinc_table(rarch_sinc_resampler_t *resamp, double cutoff,
if (calculate_delta) if (calculate_delta)
{ {
int phase; int phase;
for (p = 0; p < phases - 1; p++) for (p = 0; p < phases - 1; p++)
{ {
for (j = 0; j < taps; j++) for (j = 0; j < taps; j++)
@ -204,9 +204,9 @@ static void init_sinc_table(rarch_sinc_resampler_t *resamp, double cutoff,
for (j = 0; j < taps; j++) for (j = 0; j < taps; j++)
{ {
float val, delta; float val, delta;
double window_phase, sinc_phase; double sinc_phase;
int n = j * phases + (phase + 1); int n = j * phases + (phase + 1);
window_phase = (double)n / (phases * taps); /* (0, 1]. */ double window_phase = (double)n / (phases * taps); /* (0, 1]. */
window_phase = 2.0 * window_phase - 1.0; /* (-1, 1] */ window_phase = 2.0 * window_phase - 1.0; /* (-1, 1] */
sinc_phase = sidelobes * window_phase; sinc_phase = sidelobes * window_phase;
@ -431,7 +431,6 @@ static void resampler_sinc_process(void *re_, struct resampler_data *data)
rarch_sinc_resampler_t *re = (rarch_sinc_resampler_t*)re_; rarch_sinc_resampler_t *re = (rarch_sinc_resampler_t*)re_;
uint32_t ratio = PHASES / data->ratio; uint32_t ratio = PHASES / data->ratio;
const float *input = data->data_in; const float *input = data->data_in;
float *output = data->data_out; float *output = data->data_out;
size_t frames = data->input_frames; size_t frames = data->input_frames;
@ -480,12 +479,11 @@ static void *resampler_sinc_new(const struct resampler_config *config,
double cutoff; double cutoff;
rarch_sinc_resampler_t *re = (rarch_sinc_resampler_t*) rarch_sinc_resampler_t *re = (rarch_sinc_resampler_t*)
calloc(1, sizeof(*re)); calloc(1, sizeof(*re));
(void)config;
if (!re) if (!re)
return NULL; return NULL;
memset(re, 0, sizeof(*re)); (void)config;
re->taps = TAPS; re->taps = TAPS;
cutoff = CUTOFF; cutoff = CUTOFF;