1 // Copyright 2014 Google Inc. All Rights Reserved. 2 // 3 // Use of this source code is governed by a BSD-style license 4 // that can be found in the COPYING file in the root of the source 5 // tree. An additional intellectual property rights grant can be found 6 // in the file PATENTS. All contributing project authors may 7 // be found in the AUTHORS file in the root of the source tree. 8 // ----------------------------------------------------------------------------- 9 // 10 // ARGB making functions (SSE2 version). 11 // 12 // Author: Skal (pascal.massimino (at) gmail.com) 13 14 #include "./dsp.h" 15 16 #if defined(WEBP_USE_SSE2) 17 18 #include <assert.h> 19 #include <emmintrin.h> 20 #include <string.h> 21 22 static WEBP_INLINE uint32_t MakeARGB32(int a, int r, int g, int b) { 23 return (((uint32_t)a << 24) | (r << 16) | (g << 8) | b); 24 } 25 26 static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g, 27 const uint8_t* b, int len, uint32_t* out) { 28 if (g == r + 1) { // RGBA input order. Need to swap R and B. 29 int i = 0; 30 const int len_max = len & ~3; // max length processed in main loop 31 const __m128i red_blue_mask = _mm_set1_epi32(0x00ff00ffu); 32 assert(b == r + 2); 33 assert(a == r + 3); 34 for (; i < len_max; i += 4) { 35 const __m128i A = _mm_loadu_si128((const __m128i*)(r + 4 * i)); 36 const __m128i B = _mm_and_si128(A, red_blue_mask); // R 0 B 0 37 const __m128i C = _mm_andnot_si128(red_blue_mask, A); // 0 G 0 A 38 const __m128i D = _mm_shufflelo_epi16(B, _MM_SHUFFLE(2, 3, 0, 1)); 39 const __m128i E = _mm_shufflehi_epi16(D, _MM_SHUFFLE(2, 3, 0, 1)); 40 const __m128i F = _mm_or_si128(E, C); 41 _mm_storeu_si128((__m128i*)(out + i), F); 42 } 43 for (; i < len; ++i) { 44 out[i] = MakeARGB32(a[4 * i], r[4 * i], g[4 * i], b[4 * i]); 45 } 46 } else { 47 assert(g == b + 1); 48 assert(r == b + 2); 49 assert(a == b + 3); 50 memcpy(out, b, len * 4); 51 } 52 } 53 54 //------------------------------------------------------------------------------ 55 // Entry point 56 57 extern void VP8EncDspARGBInitSSE2(void); 58 59 WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitSSE2(void) { 60 VP8PackARGB = PackARGB; 61 } 62 63 #else // !WEBP_USE_SSE2 64 65 WEBP_DSP_INIT_STUB(VP8EncDspARGBInitSSE2) 66 67 #endif // WEBP_USE_SSE2 68
