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fmt: use faster s24 to f32 conversion

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This commit is contained in:
Wim Taymans 2018-11-21 15:51:03 +01:00
parent 25c81e8c34
commit 13010d5d2e
2 changed files with 22 additions and 23 deletions
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28
spa/plugins/audioconvert/fmt-ops.c
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@ -46,27 +46,21 @@
#define S32_MAX 2147483647
#define S32_SCALE 2147483647
union s24_data {
struct {
#if __BYTE_ORDER == __LITTLE_ENDIAN
uint16_t lo;
int16_t hi;
#else
int16_t hi;
uint16_t lo;
#endif
} s24;
int32_t value;
};
static inline int32_t read_s24(const void *src)
{
union s24_data d;
const uint8_t *s = src;
d.s24.hi = ((int8_t*)s)[2];
d.s24.lo = *((uint16_t*)s);
return d.value;
union {
int8_t v[4];
int32_t value;
} d;
#if __BYTE_ORDER == __LITTLE_ENDIAN
memcpy(&d.v[1], src, 3);
#else
memcpy(&d.v[0], src, 3);
#endif
return d.value >> 8;
}
#define READ24(s) read_s24(s)
#if defined (__SSE__)