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pixfmt_conv.c: RGB <-> RGBA #397

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pixfmt_conv.c: RGB <-> RGBA #397

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86 changes: 82 additions & 4 deletions src/pixfmt_conv.c
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Original file line number Diff line number Diff line change
Expand Up @@ -779,11 +779,33 @@ static void vc_copylineRGBAtoRGBwithShift(unsigned char * __restrict dst2, const
*/
void vc_copylineABGRtoRGB(unsigned char * __restrict dst2, const unsigned char * __restrict src2, int dst_len, int rshift, int gshift, int bshift)
{
#ifdef __SSSE3__
__m128i shuf = _mm_setr_epi8(3, 2, 1, 7, 6, 5, 11, 10, 9, 15, 14, 13, 0xff, 0xff, 0xff, 0xff);
__m128i loaded;
int x;
for (x = 0; x <= dst_len - 12; x += 12) {
loaded = _mm_lddqu_si128((const __m128i_u *) src2);
loaded = _mm_shuffle_epi8(loaded, shuf);
_mm_storeu_si128((__m128i_u *)dst2, loaded);

src2 += 16;
dst2 += 12;
}

rshift = 16; gshift = 8; bshift = 0;
uint8_t *dst_c = (uint8_t *) dst2;
for (; x <= dst_len - 3; x += 3) {
register uint32_t in = *src2++;
*dst_c++ = (in >> rshift) & 0xff;
*dst_c++ = (in >> gshift) & 0xff;
*dst_c++ = (in >> bshift) & 0xff;
}
#else
UNUSED(rshift);
UNUSED(gshift);
UNUSED(bshift);

vc_copylineRGBAtoRGBwithShift(dst2, src2, dst_len, 16, 8, 0);
vc_copylineRGBAtoRGBwithShift(dst, src, dst_len, 16, 8, 0);
#endif
}

/**
Expand All @@ -792,10 +814,33 @@ void vc_copylineABGRtoRGB(unsigned char * __restrict dst2, const unsigned char *
*/
static void vc_copylineRGBAtoRGB(unsigned char * __restrict dst, const unsigned char * __restrict src, int dst_len, int rshift, int gshift, int bshift)
{
#ifdef __SSSE3__
__m128i shuf = _mm_setr_epi8(0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 14, 0xff, 0xff, 0xff, 0xff);
__m128i loaded;
int x;
for (x = 0; x <= dst_len - 12; x += 12) {
loaded = _mm_lddqu_si128((const __m128i_u *) src);
loaded = _mm_shuffle_epi8(loaded, shuf);
_mm_storeu_si128((__m128i_u *)dst, loaded);

src += 16;
dst += 12;
}

rshift = 0; gshift = 8; bshift = 16;
uint8_t *dst_c = (uint8_t *) dst;
for (; x <= dst_len - 3; x += 3) {
register uint32_t in = *src++;
*dst_c++ = (in >> rshift) & 0xff;
*dst_c++ = (in >> gshift) & 0xff;
*dst_c++ = (in >> bshift) & 0xff;
}
#else
UNUSED(rshift);
UNUSED(gshift);
UNUSED(bshift);
vc_copylineRGBAtoRGBwithShift(dst, src, dst_len, 0, 8, 16);
#endif
}

/**
Expand Down Expand Up @@ -842,11 +887,44 @@ void vc_copylineUYVYtoGrayscale(unsigned char * __restrict dst, const unsigned c
*/
void vc_copylineRGBtoRGBA(unsigned char * __restrict dst, const unsigned char * __restrict src, int dst_len, int rshift, int gshift, int bshift)
{


#ifdef __SSSE3__
__m128i alpha_mask_sse = _mm_set1_epi32(0xFFFFFFFFU ^ (0xFFU << rshift) ^ (0xFFU << gshift) ^ (0xFFU << bshift));
__m128i shuf;

// common shifts are 0 8 16 (RGB) or 16 8 0 (BGR)
// generalized solution would be too complex and not faster
__m128i loaded;
bool is_simd_compat = false;

if (rshift == 0 && gshift == 8 && bshift == 16) {
is_simd_compat = true;
shuf = _mm_setr_epi8(0, 1, 2, 0xff, 3, 4, 5, 0xff, 6, 7, 8, 0xff, 9, 10, 11, 0xff);
} else if (rshift == 16 && gshift == 8 && bshift && 0) {
is_simd_compat = true;
shuf = _mm_setr_epi8(2, 1, 0, 0xff, 5, 4, 3, 0xff, 8, 7, 6, 0xff, 11, 10, 9, 0xff);
}

int x = 0;

if (is_simd_compat) {
OPTIMIZED_FOR (x = 0; x <= dst_len - 16; x += 16) {
loaded = _mm_lddqu_si128((const __m128i_u *) src);
loaded = _mm_shuffle_epi8(loaded, shuf);
loaded = _mm_or_si128(loaded, alpha_mask_sse);
_mm_storeu_si128((__m128i_u *)dst, loaded);
src += 12;
dst += 16;
}
}
#endif

uint32_t alpha_mask = 0xFFFFFFFFU ^ (0xFFU << rshift) ^ (0xFFU << gshift) ^ (0xFFU << bshift);
register unsigned int r, g, b;
register uint32_t *d = (uint32_t *)(void *) dst;
uint32_t alpha_mask = 0xFFFFFFFFU ^ (0xFFU << rshift) ^ (0xFFU << gshift) ^ (0xFFU << bshift);

OPTIMIZED_FOR (int x = 0; x <= dst_len - 4; x += 4) {
OPTIMIZED_FOR (; x <= dst_len - 4; x += 4) {
r = *src++;
g = *src++;
b = *src++;
Expand Down
2 changes: 1 addition & 1 deletion tools/Makefile
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
FLAGS ?= -O2 -g
FLAGS ?= -O2 -g -msse4.1
SRCDIR ?= ..
COMMON_FLAGS = $(FLAGS) -D_GNU_SOURCE -I$(SRCDIR)/src/
MKDIR_P = mkdir -p
Expand Down
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