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audioconvert: optimize dither

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Add sse2 dither optimization
This commit is contained in:
Wim Taymans 2022-06-27 14:15:01 +02:00
parent 9f55708e9d
commit b41d52cfd1
6 changed files with 160 additions and 17 deletions
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21
spa/plugins/audioconvert/dither-ops.c
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@ -34,6 +34,8 @@
#include "dither-ops.h"
#define DITHER_SIZE (1<<10)
typedef void (*dither_func_t) (struct dither *d, void * SPA_RESTRICT dst[],
const void * SPA_RESTRICT src[], uint32_t n_samples);
@ -42,6 +44,9 @@ static const struct dither_info {
uint32_t cpu_flags;
} dither_table[] =
{
#if defined (HAVE_SSE2)
{ dither_f32_sse2, 0 },
#endif
{ dither_f32_c, 0 },
};
@ -61,6 +66,8 @@ static const struct dither_info *find_dither_info(uint32_t cpu_flags)
static void impl_dither_free(struct dither *d)
{
d->process = NULL;
free(d->dither);
d->dither = NULL;
}
int dither_init(struct dither *d)
@ -72,11 +79,19 @@ int dither_init(struct dither *d)
if (info == NULL)
return -ENOTSUP;
if (d->intensity >= 64)
if (d->intensity >= 32)
return -EINVAL;
for (i = 0; i < SPA_N_ELEMENTS(d->tab); i++)
d->tab[i] = (drand48() - 0.5) / (UINT64_C(1) << d->intensity);
d->scale = 1.0f / (1ULL << (31 + d->intensity));
d->dither_size = DITHER_SIZE;
d->dither = calloc(d->dither_size + 8, sizeof(float));
if (d->dither == NULL)
return -errno;
for (i = 0; i < SPA_N_ELEMENTS(d->random); i++)
d->random[i] = random();
d->free = impl_dither_free;
d->process = info->process;