| // Copyright 2014 Google Inc. All Rights Reserved. |
| // |
| // Use of this source code is governed by a BSD-style license |
| // that can be found in the COPYING file in the root of the source |
| // tree. An additional intellectual property rights grant can be found |
| // in the file PATENTS. All contributing project authors may |
| // be found in the AUTHORS file in the root of the source tree. |
| // ----------------------------------------------------------------------------- |
| // |
| // ARGB making functions (SSE2 version). |
| // |
| // Author: Skal (pascal.massimino@gmail.com) |
| |
| #include "third_party/chromium_headless/libwebp/dsp/dsp.h" |
| |
| #if defined(WEBP_USE_SSE2) |
| |
| #include <assert.h> |
| #include <emmintrin.h> |
| #include <string.h> |
| |
| static WEBP_INLINE uint32_t MakeARGB32(int a, int r, int g, int b) { |
| return (((uint32_t)a << 24) | (r << 16) | (g << 8) | b); |
| } |
| |
| static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g, |
| const uint8_t* b, int len, uint32_t* out) { |
| if (g == r + 1) { // RGBA input order. Need to swap R and B. |
| int i = 0; |
| const int len_max = len & ~3; // max length processed in main loop |
| const __m128i red_blue_mask = _mm_set1_epi32(0x00ff00ffu); |
| assert(b == r + 2); |
| assert(a == r + 3); |
| for (; i < len_max; i += 4) { |
| const __m128i A = _mm_loadu_si128((const __m128i*)(r + 4 * i)); |
| const __m128i B = _mm_and_si128(A, red_blue_mask); // R 0 B 0 |
| const __m128i C = _mm_andnot_si128(red_blue_mask, A); // 0 G 0 A |
| const __m128i D = _mm_shufflelo_epi16(B, _MM_SHUFFLE(2, 3, 0, 1)); |
| const __m128i E = _mm_shufflehi_epi16(D, _MM_SHUFFLE(2, 3, 0, 1)); |
| const __m128i F = _mm_or_si128(E, C); |
| _mm_storeu_si128((__m128i*)(out + i), F); |
| } |
| for (; i < len; ++i) { |
| out[i] = MakeARGB32(a[4 * i], r[4 * i], g[4 * i], b[4 * i]); |
| } |
| } else { |
| assert(g == b + 1); |
| assert(r == b + 2); |
| assert(a == b + 3); |
| memcpy(out, b, len * 4); |
| } |
| } |
| |
| //------------------------------------------------------------------------------ |
| // Entry point |
| |
| extern void VP8EncDspARGBInitSSE2(void); |
| |
| WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitSSE2(void) { |
| VP8PackARGB = PackARGB; |
| } |
| |
| #else // !WEBP_USE_SSE2 |
| |
| WEBP_DSP_INIT_STUB(VP8EncDspARGBInitSSE2) |
| |
| #endif // WEBP_USE_SSE2 |