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@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
MakeARGB32(int a,int r,int g,int b)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
PackARGB(const uint8_t * a,const uint8_t * r,const uint8_t * g,const uint8_t * b,int len,uint32_t * out)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
VP8EncDspARGBInitSSE2(void)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