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Implement true-motion prediction in SSE2

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(along with DC/HE/VE for chroma/luma16)

Overall effect is ~1% faster decoding.

Change-Id: I90917e050d61874cbc8da0e88f26b5dd6131c265
This commit is contained in:
Pascal Massimino 2015-02-04 17:02:22 +01:00
parent 774d4cb758
commit 19f0ba0eb9
1 changed files with 178 additions and 0 deletions
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178
src/dsp/dec_sse2.c
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@ -1069,6 +1069,166 @@ static void RD4(uint8_t* dst) { // Down-right
#undef DST
#undef AVG3
//------------------------------------------------------------------------------
// Luma 16x16
static WEBP_INLINE void TrueMotion(uint8_t* dst, int size) {
const uint8_t* top = dst - BPS;
const __m128i zero = _mm_setzero_si128();
int y;
if (size == 4) {
const __m128i top_values = _mm_cvtsi32_si128(*(int*)top);
const __m128i top_base = _mm_unpacklo_epi8(top_values, zero);
for (y = 0; y < 4; ++y, dst += BPS) {
const int val = dst[-1] - top[-1];
const __m128i base = _mm_set1_epi16(val);
const __m128i out = _mm_packus_epi16(_mm_add_epi16(base, top_base), zero);
*(int*)dst = _mm_cvtsi128_si32(out);
}
} else if (size == 8) {
const __m128i top_values = _mm_loadl_epi64((const __m128i*)top);
const __m128i top_base = _mm_unpacklo_epi8(top_values, zero);
for (y = 0; y < 8; ++y, dst += BPS) {
const int val = dst[-1] - top[-1];
const __m128i base = _mm_set1_epi16(val);
const __m128i out = _mm_packus_epi16(_mm_add_epi16(base, top_base), zero);
_mm_storel_epi64((__m128i*)dst, out);
}
} else {
const __m128i top_values = _mm_loadu_si128((const __m128i*)top);
const __m128i top_base_0 = _mm_unpacklo_epi8(top_values, zero);
const __m128i top_base_1 = _mm_unpackhi_epi8(top_values, zero);
for (y = 0; y < 16; ++y, dst += BPS) {
const int val = dst[-1] - top[-1];
const __m128i base = _mm_set1_epi16(val);
const __m128i out_0 = _mm_add_epi16(base, top_base_0);
const __m128i out_1 = _mm_add_epi16(base, top_base_1);
const __m128i out = _mm_packus_epi16(out_0, out_1);
_mm_storeu_si128((__m128i*)dst, out);
}
}
}
static void TM4(uint8_t* dst) { TrueMotion(dst, 4); }
static void TM8uv(uint8_t* dst) { TrueMotion(dst, 8); }
static void TM16(uint8_t* dst) { TrueMotion(dst, 16); }
static void VE16(uint8_t* dst) {
const __m128i top = _mm_loadu_si128((const __m128i*)(dst - BPS));
int j;
for (j = 0; j < 16; ++j) {
_mm_storeu_si128((__m128i*)(dst + j * BPS), top);
}
}
static void HE16(uint8_t* dst) { // horizontal
int j;
for (j = 16; j > 0; --j) {
const __m128i values = _mm_set1_epi8(dst[-1]);
_mm_storeu_si128((__m128i*)dst, values);
dst += BPS;
}
}
static WEBP_INLINE void Put16(uint8_t v, uint8_t* dst) {
int j;
const __m128i values = _mm_set1_epi8(v);
for (j = 0; j < 16; ++j) {
_mm_storeu_si128((__m128i*)(dst + j * BPS), values);
}
}
static void DC16(uint8_t* dst) { // DC
int DC = 16;
int j;
for (j = 0; j < 16; ++j) {
DC += dst[-1 + j * BPS] + dst[j - BPS];
}
Put16(DC >> 5, dst);
}
static void DC16NoTop(uint8_t* dst) { // DC with top samples not available
int DC = 8;
int j;
for (j = 0; j < 16; ++j) {
DC += dst[-1 + j * BPS];
}
Put16(DC >> 4, dst);
}
static void DC16NoLeft(uint8_t* dst) { // DC with left samples not available
int DC = 8;
int i;
for (i = 0; i < 16; ++i) {
DC += dst[i - BPS];
}
Put16(DC >> 4, dst);
}
static void DC16NoTopLeft(uint8_t* dst) { // DC with no top and left samples
Put16(0x80, dst);
}
//------------------------------------------------------------------------------
// Chroma
static void VE8uv(uint8_t* dst) { // vertical
int j;
const __m128i top = _mm_loadl_epi64((const __m128i*)(dst - BPS));
for (j = 0; j < 8; ++j) {
_mm_storel_epi64((__m128i*)(dst + j * BPS), top);
}
}
static void HE8uv(uint8_t* dst) { // horizontal
int j;
for (j = 0; j < 8; ++j) {
const __m128i values = _mm_set1_epi8(dst[-1]);
_mm_storel_epi64((__m128i*)dst, values);
dst += BPS;
}
}
// helper for chroma-DC predictions
static WEBP_INLINE void Put8x8uv(uint8_t v, uint8_t* dst) {
int j;
const __m128i values = _mm_set1_epi8(v);
for (j = 0; j < 8; ++j) {
_mm_storel_epi64((__m128i*)(dst + j * BPS), values);
}
}
static void DC8uv(uint8_t* dst) { // DC
int dc0 = 8;
int i;
for (i = 0; i < 8; ++i) {
dc0 += dst[i - BPS] + dst[-1 + i * BPS];
}
Put8x8uv(dc0 >> 4, dst);
}
static void DC8uvNoLeft(uint8_t* dst) { // DC with no left samples
int dc0 = 4;
int i;
for (i = 0; i < 8; ++i) {
dc0 += dst[i - BPS];
}
Put8x8uv(dc0 >> 3, dst);
}
static void DC8uvNoTop(uint8_t* dst) { // DC with no top samples
int dc0 = 4;
int i;
for (i = 0; i < 8; ++i) {
dc0 += dst[-1 + i * BPS];
}
Put8x8uv(dc0 >> 3, dst);
}
static void DC8uvNoTopLeft(uint8_t* dst) { // DC with nothing
Put8x8uv(0x80, dst);
}
#endif // WEBP_USE_SSE2
//------------------------------------------------------------------------------
@ -1097,10 +1257,28 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitSSE2(void) {
VP8SimpleVFilter16i = SimpleVFilter16i;
VP8SimpleHFilter16i = SimpleHFilter16i;
VP8PredLuma4[1] = TM4;
VP8PredLuma4[2] = VE4;
VP8PredLuma4[4] = RD4;
VP8PredLuma4[5] = VR4;
VP8PredLuma4[6] = LD4;
VP8PredLuma4[7] = VL4;
VP8PredLuma16[0] = DC16;
VP8PredLuma16[1] = TM16;
VP8PredLuma16[2] = VE16;
VP8PredLuma16[3] = HE16;
VP8PredLuma16[4] = DC16NoTop;
VP8PredLuma16[5] = DC16NoLeft;
VP8PredLuma16[6] = DC16NoTopLeft;
VP8PredChroma8[0] = DC8uv;
VP8PredChroma8[1] = TM8uv;
VP8PredChroma8[2] = VE8uv;
VP8PredChroma8[3] = HE8uv;
VP8PredChroma8[4] = DC8uvNoTop;
VP8PredChroma8[5] = DC8uvNoLeft;
VP8PredChroma8[6] = DC8uvNoTopLeft;
#endif // WEBP_USE_SSE2
}