dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-16 13:59:51 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

Remove memcpy in lossless decoding.

Browse Source 
Change-Id: Iba694b306486d67764e2fc5576c98a974c9b886c
This commit is contained in:
Vincent Rabaud
2016-11-24 17:45:22 +01:00
parent 7474d46e45
commit 71e2f5cadf
8 changed files with 151 additions and 112 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
src/dsp/lossless_sse2.c
View File

@ -157,26 +157,28 @@ static uint32_t Predictor13(uint32_t left, const uint32_t* const top) {
//------------------------------------------------------------------------------
// Subtract-Green Transform
static void AddGreenToBlueAndRed(uint32_t* argb_data, int num_pixels) {
static void AddGreenToBlueAndRed(const uint32_t* const src, int num_pixels,
uint32_t* dst) {
int i;
for (i = 0; i + 4 <= num_pixels; i += 4) {
const __m128i in = _mm_loadu_si128((__m128i*)&argb_data[i]); // argb
const __m128i in = _mm_loadu_si128((const __m128i*)&src[i]); // argb
const __m128i A = _mm_srli_epi16(in, 8); // 0 a 0 g
const __m128i B = _mm_shufflelo_epi16(A, _MM_SHUFFLE(2, 2, 0, 0));
const __m128i C = _mm_shufflehi_epi16(B, _MM_SHUFFLE(2, 2, 0, 0)); // 0g0g
const __m128i out = _mm_add_epi8(in, C);
_mm_storeu_si128((__m128i*)&argb_data[i], out);
_mm_storeu_si128((__m128i*)&dst[i], out);
}
// fallthrough and finish off with plain-C
VP8LAddGreenToBlueAndRed_C(argb_data + i, num_pixels - i);
VP8LAddGreenToBlueAndRed_C(src + i, num_pixels - i, dst + i);
}
//------------------------------------------------------------------------------
// Color Transform
static void TransformColorInverse(const VP8LMultipliers* const m,
uint32_t* argb_data, int num_pixels) {
// sign-extended multiplying constants, pre-shifted by 5.
const uint32_t* const src, int num_pixels,
uint32_t* dst) {
// sign-extended multiplying constants, pre-shifted by 5.
#define CST(X) (((int16_t)(m->X << 8)) >> 5) // sign-extend
const __m128i mults_rb = _mm_set_epi16(
CST(green_to_red_), CST(green_to_blue_),
@ -190,7 +192,7 @@ static void TransformColorInverse(const VP8LMultipliers* const m,
const __m128i mask_ag = _mm_set1_epi32(0xff00ff00); // alpha-green masks
int i;
for (i = 0; i + 4 <= num_pixels; i += 4) {
const __m128i in = _mm_loadu_si128((__m128i*)&argb_data[i]); // argb
const __m128i in = _mm_loadu_si128((const __m128i*)&src[i]); // argb
const __m128i A = _mm_and_si128(in, mask_ag); // a 0 g 0
const __m128i B = _mm_shufflelo_epi16(A, _MM_SHUFFLE(2, 2, 0, 0));
const __m128i C = _mm_shufflehi_epi16(B, _MM_SHUFFLE(2, 2, 0, 0)); // g0g0
@ -202,10 +204,10 @@ static void TransformColorInverse(const VP8LMultipliers* const m,
const __m128i I = _mm_add_epi8(H, F); // r' x b'' 0
const __m128i J = _mm_srli_epi16(I, 8); // 0 r' 0 b''
const __m128i out = _mm_or_si128(J, A);
_mm_storeu_si128((__m128i*)&argb_data[i], out);
_mm_storeu_si128((__m128i*)&dst[i], out);
}
// Fall-back to C-version for left-overs.
VP8LTransformColorInverse_C(m, argb_data + i, num_pixels - i);
VP8LTransformColorInverse_C(m, src + i, num_pixels - i, dst + i);
}
//------------------------------------------------------------------------------