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audioconvert: avoid unaligned read

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See #3572
This commit is contained in:
Wim Taymans 2023-10-15 22:20:54 +02:00
parent fdc1391b19
commit 2bef057428
1 changed files with 11 additions and 4 deletions
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15
spa/plugins/audioconvert/fmt-ops-sse41.c
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@ -6,6 +6,13 @@
#include <smmintrin.h> #include <smmintrin.h>
#define spa_read_unaligned(ptr, type) \
__extension__ ({ \
__typeof__(type) _val; \
memcpy(&_val, (ptr), sizeof(_val)); \
_val; \
})
static void static void
conv_s24_to_f32d_1s_sse41(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src, conv_s24_to_f32d_1s_sse41(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src,
uint32_t n_channels, uint32_t n_samples) uint32_t n_channels, uint32_t n_samples)
@ -22,10 +29,10 @@ conv_s24_to_f32d_1s_sse41(void *data, void * SPA_RESTRICT dst[], const void * SP
unrolled = 0; unrolled = 0;
for(n = 0; n < unrolled; n += 4) { for(n = 0; n < unrolled; n += 4) {
in = _mm_insert_epi32(in, *((uint32_t*)&s[0 * n_channels]), 0); in = _mm_insert_epi32(in, spa_read_unaligned(&s[0 * n_channels], uint32_t), 0);
in = _mm_insert_epi32(in, *((uint32_t*)&s[1 * n_channels]), 1); in = _mm_insert_epi32(in, spa_read_unaligned(&s[1 * n_channels], uint32_t), 1);
in = _mm_insert_epi32(in, *((uint32_t*)&s[2 * n_channels]), 2); in = _mm_insert_epi32(in, spa_read_unaligned(&s[2 * n_channels], uint32_t), 2);
in = _mm_insert_epi32(in, *((uint32_t*)&s[3 * n_channels]), 3); in = _mm_insert_epi32(in, spa_read_unaligned(&s[3 * n_channels], uint32_t), 3);
in = _mm_slli_epi32(in, 8); in = _mm_slli_epi32(in, 8);
in = _mm_srai_epi32(in, 8); in = _mm_srai_epi32(in, 8);
out = _mm_cvtepi32_ps(in); out = _mm_cvtepi32_ps(in);