static void *resampler_sinc_new(const struct resampler_config *config,
double bandwidth_mod, resampler_simd_mask_t mask)
{
size_t phase_elems, elems;
double cutoff;
rarch_sinc_resampler_t *re = (rarch_sinc_resampler_t*)
calloc(1, sizeof(*re));
if (!re)
return NULL;
(void)config;
re->taps = TAPS;
cutoff = CUTOFF;
/* Downsampling, must lower cutoff, and extend number of
* taps accordingly to keep same stopband attenuation. */
if (bandwidth_mod < 1.0)
{
cutoff *= bandwidth_mod;
re->taps = (unsigned)ceil(re->taps / bandwidth_mod);
}
/* Be SIMD-friendly. */
#if (defined(__AVX__) && ENABLE_AVX) || defined(__ARM_NEON__)
re->taps = (re->taps + 7) & ~7;
#else
re->taps = (re->taps + 3) & ~3;
#endif
phase_elems = (1 << PHASE_BITS) * re->taps;
#if SINC_COEFF_LERP
phase_elems *= 2;
#endif
elems = phase_elems + 4 * re->taps;
re->main_buffer = (float*)
aligned_alloc__(128, sizeof(float) * elems);
if (!re->main_buffer)
goto error;
re->phase_table = re->main_buffer;
re->buffer_l = re->main_buffer + phase_elems;
re->buffer_r = re->buffer_l + 2 * re->taps;
init_sinc_table(re, cutoff, re->phase_table,
1 << PHASE_BITS, re->taps, SINC_COEFF_LERP);
#if defined(__ARM_NEON__)
process_sinc_func = mask & RESAMPLER_SIMD_NEON
? process_sinc_neon : process_sinc_C;
#endif
return re;
error:
resampler_sinc_free(re);
return NULL;
}
static void *resampler_sinc_new(double bandwidth_mod)
{
rarch_sinc_resampler_t *re = (rarch_sinc_resampler_t*)calloc(1, sizeof(*re));
if (!re)
return NULL;
memset(re, 0, sizeof(*re));
re->taps = TAPS;
double cutoff = CUTOFF;
// Downsampling, must lower cutoff, and extend number of taps accordingly to keep same stopband attenuation.
if (bandwidth_mod < 1.0)
{
cutoff *= bandwidth_mod;
re->taps = (unsigned)ceil(re->taps / bandwidth_mod);
}
// Be SIMD-friendly.
#if (defined(__AVX__) && ENABLE_AVX) || defined(HAVE_NEON)
re->taps = (re->taps + 7) & ~7;
#else
re->taps = (re->taps + 3) & ~3;
#endif
size_t phase_elems = (1 << PHASE_BITS) * re->taps;
#if SINC_COEFF_LERP
phase_elems *= 2;
#endif
size_t elems = phase_elems + 4 * re->taps;
re->main_buffer = (float*)aligned_alloc__(128, sizeof(float) * elems);
if (!re->main_buffer)
goto error;
re->phase_table = re->main_buffer;
re->buffer_l = re->main_buffer + phase_elems;
re->buffer_r = re->buffer_l + 2 * re->taps;
init_sinc_table(re, cutoff, re->phase_table, 1 << PHASE_BITS, re->taps, SINC_COEFF_LERP);
#if defined(__AVX__) && ENABLE_AVX
RARCH_LOG("Sinc resampler [AVX]\n");
#elif defined(__SSE__)
RARCH_LOG("Sinc resampler [SSE]\n");
#elif defined(HAVE_NEON)
process_sinc_func = process_sinc_neon;
RARCH_LOG("Sinc resampler [%s]\n", "NEON");
#else
RARCH_LOG("Sinc resampler [C]\n");
#endif
RARCH_LOG("SINC params (%u phase bits, %u taps).\n", PHASE_BITS, re->taps);
return re;
error:
resampler_sinc_free(re);
return NULL;
}
