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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 // YUV->RGB conversion functions
11 //
12 // Author: Skal (pascal.massimino@gmail.com)
13 
14 #include "src/dsp/yuv.h"
15 
16 #if defined(WEBP_USE_SSE41)
17 
18 #include "src/dsp/common_sse41.h"
19 #include <stdlib.h>
20 #include <smmintrin.h>
21 
22 //-----------------------------------------------------------------------------
23 // Convert spans of 32 pixels to various RGB formats for the fancy upsampler.
24 
25 // These constants are 14b fixed-point version of ITU-R BT.601 constants.
26 // R = (19077 * y             + 26149 * v - 14234) >> 6
27 // G = (19077 * y -  6419 * u - 13320 * v +  8708) >> 6
28 // B = (19077 * y + 33050 * u             - 17685) >> 6
ConvertYUV444ToRGB_SSE41(const __m128i * const Y0,const __m128i * const U0,const __m128i * const V0,__m128i * const R,__m128i * const G,__m128i * const B)29 static void ConvertYUV444ToRGB_SSE41(const __m128i* const Y0,
30                                      const __m128i* const U0,
31                                      const __m128i* const V0,
32                                      __m128i* const R,
33                                      __m128i* const G,
34                                      __m128i* const B) {
35   const __m128i k19077 = _mm_set1_epi16(19077);
36   const __m128i k26149 = _mm_set1_epi16(26149);
37   const __m128i k14234 = _mm_set1_epi16(14234);
38   // 33050 doesn't fit in a signed short: only use this with unsigned arithmetic
39   const __m128i k33050 = _mm_set1_epi16((short)33050);
40   const __m128i k17685 = _mm_set1_epi16(17685);
41   const __m128i k6419  = _mm_set1_epi16(6419);
42   const __m128i k13320 = _mm_set1_epi16(13320);
43   const __m128i k8708  = _mm_set1_epi16(8708);
44 
45   const __m128i Y1 = _mm_mulhi_epu16(*Y0, k19077);
46 
47   const __m128i R0 = _mm_mulhi_epu16(*V0, k26149);
48   const __m128i R1 = _mm_sub_epi16(Y1, k14234);
49   const __m128i R2 = _mm_add_epi16(R1, R0);
50 
51   const __m128i G0 = _mm_mulhi_epu16(*U0, k6419);
52   const __m128i G1 = _mm_mulhi_epu16(*V0, k13320);
53   const __m128i G2 = _mm_add_epi16(Y1, k8708);
54   const __m128i G3 = _mm_add_epi16(G0, G1);
55   const __m128i G4 = _mm_sub_epi16(G2, G3);
56 
57   // be careful with the saturated *unsigned* arithmetic here!
58   const __m128i B0 = _mm_mulhi_epu16(*U0, k33050);
59   const __m128i B1 = _mm_adds_epu16(B0, Y1);
60   const __m128i B2 = _mm_subs_epu16(B1, k17685);
61 
62   // use logical shift for B2, which can be larger than 32767
63   *R = _mm_srai_epi16(R2, 6);   // range: [-14234, 30815]
64   *G = _mm_srai_epi16(G4, 6);   // range: [-10953, 27710]
65   *B = _mm_srli_epi16(B2, 6);   // range: [0, 34238]
66 }
67 
68 // Load the bytes into the *upper* part of 16b words. That's "<< 8", basically.
Load_HI_16_SSE41(const uint8_t * src)69 static WEBP_INLINE __m128i Load_HI_16_SSE41(const uint8_t* src) {
70   const __m128i zero = _mm_setzero_si128();
71   return _mm_unpacklo_epi8(zero, _mm_loadl_epi64((const __m128i*)src));
72 }
73 
74 // Load and replicate the U/V samples
Load_UV_HI_8_SSE41(const uint8_t * src)75 static WEBP_INLINE __m128i Load_UV_HI_8_SSE41(const uint8_t* src) {
76   const __m128i zero = _mm_setzero_si128();
77   const __m128i tmp0 = _mm_cvtsi32_si128(*(const uint32_t*)src);
78   const __m128i tmp1 = _mm_unpacklo_epi8(zero, tmp0);
79   return _mm_unpacklo_epi16(tmp1, tmp1);   // replicate samples
80 }
81 
82 // Convert 32 samples of YUV444 to R/G/B
YUV444ToRGB_SSE41(const uint8_t * const y,const uint8_t * const u,const uint8_t * const v,__m128i * const R,__m128i * const G,__m128i * const B)83 static void YUV444ToRGB_SSE41(const uint8_t* const y,
84                               const uint8_t* const u,
85                               const uint8_t* const v,
86                               __m128i* const R, __m128i* const G,
87                               __m128i* const B) {
88   const __m128i Y0 = Load_HI_16_SSE41(y), U0 = Load_HI_16_SSE41(u),
89                 V0 = Load_HI_16_SSE41(v);
90   ConvertYUV444ToRGB_SSE41(&Y0, &U0, &V0, R, G, B);
91 }
92 
93 // Convert 32 samples of YUV420 to R/G/B
YUV420ToRGB_SSE41(const uint8_t * const y,const uint8_t * const u,const uint8_t * const v,__m128i * const R,__m128i * const G,__m128i * const B)94 static void YUV420ToRGB_SSE41(const uint8_t* const y,
95                               const uint8_t* const u,
96                               const uint8_t* const v,
97                               __m128i* const R, __m128i* const G,
98                               __m128i* const B) {
99   const __m128i Y0 = Load_HI_16_SSE41(y), U0 = Load_UV_HI_8_SSE41(u),
100                 V0 = Load_UV_HI_8_SSE41(v);
101   ConvertYUV444ToRGB_SSE41(&Y0, &U0, &V0, R, G, B);
102 }
103 
104 // Pack the planar buffers
105 // rrrr... rrrr... gggg... gggg... bbbb... bbbb....
106 // triplet by triplet in the output buffer rgb as rgbrgbrgbrgb ...
PlanarTo24b_SSE41(__m128i * const in0,__m128i * const in1,__m128i * const in2,__m128i * const in3,__m128i * const in4,__m128i * const in5,uint8_t * const rgb)107 static WEBP_INLINE void PlanarTo24b_SSE41(
108     __m128i* const in0, __m128i* const in1, __m128i* const in2,
109     __m128i* const in3, __m128i* const in4, __m128i* const in5,
110     uint8_t* const rgb) {
111   // The input is 6 registers of sixteen 8b but for the sake of explanation,
112   // let's take 6 registers of four 8b values.
113   // To pack, we will keep taking one every two 8b integer and move it
114   // around as follows:
115   // Input:
116   //   r0r1r2r3 | r4r5r6r7 | g0g1g2g3 | g4g5g6g7 | b0b1b2b3 | b4b5b6b7
117   // Split the 6 registers in two sets of 3 registers: the first set as the even
118   // 8b bytes, the second the odd ones:
119   //   r0r2r4r6 | g0g2g4g6 | b0b2b4b6 | r1r3r5r7 | g1g3g5g7 | b1b3b5b7
120   // Repeat the same permutations twice more:
121   //   r0r4g0g4 | b0b4r1r5 | g1g5b1b5 | r2r6g2g6 | b2b6r3r7 | g3g7b3b7
122   //   r0g0b0r1 | g1b1r2g2 | b2r3g3b3 | r4g4b4r5 | g5b5r6g6 | b6r7g7b7
123   VP8PlanarTo24b_SSE41(in0, in1, in2, in3, in4, in5);
124 
125   _mm_storeu_si128((__m128i*)(rgb +  0), *in0);
126   _mm_storeu_si128((__m128i*)(rgb + 16), *in1);
127   _mm_storeu_si128((__m128i*)(rgb + 32), *in2);
128   _mm_storeu_si128((__m128i*)(rgb + 48), *in3);
129   _mm_storeu_si128((__m128i*)(rgb + 64), *in4);
130   _mm_storeu_si128((__m128i*)(rgb + 80), *in5);
131 }
132 
VP8YuvToRgb32_SSE41(const uint8_t * y,const uint8_t * u,const uint8_t * v,uint8_t * dst)133 void VP8YuvToRgb32_SSE41(const uint8_t* y, const uint8_t* u, const uint8_t* v,
134                          uint8_t* dst) {
135   __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
136   __m128i rgb0, rgb1, rgb2, rgb3, rgb4, rgb5;
137 
138   YUV444ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0);
139   YUV444ToRGB_SSE41(y + 8, u + 8, v + 8, &R1, &G1, &B1);
140   YUV444ToRGB_SSE41(y + 16, u + 16, v + 16, &R2, &G2, &B2);
141   YUV444ToRGB_SSE41(y + 24, u + 24, v + 24, &R3, &G3, &B3);
142 
143   // Cast to 8b and store as RRRRGGGGBBBB.
144   rgb0 = _mm_packus_epi16(R0, R1);
145   rgb1 = _mm_packus_epi16(R2, R3);
146   rgb2 = _mm_packus_epi16(G0, G1);
147   rgb3 = _mm_packus_epi16(G2, G3);
148   rgb4 = _mm_packus_epi16(B0, B1);
149   rgb5 = _mm_packus_epi16(B2, B3);
150 
151   // Pack as RGBRGBRGBRGB.
152   PlanarTo24b_SSE41(&rgb0, &rgb1, &rgb2, &rgb3, &rgb4, &rgb5, dst);
153 }
154 
VP8YuvToBgr32_SSE41(const uint8_t * y,const uint8_t * u,const uint8_t * v,uint8_t * dst)155 void VP8YuvToBgr32_SSE41(const uint8_t* y, const uint8_t* u, const uint8_t* v,
156                          uint8_t* dst) {
157   __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
158   __m128i bgr0, bgr1, bgr2, bgr3, bgr4, bgr5;
159 
160   YUV444ToRGB_SSE41(y +  0, u +  0, v +  0, &R0, &G0, &B0);
161   YUV444ToRGB_SSE41(y +  8, u +  8, v +  8, &R1, &G1, &B1);
162   YUV444ToRGB_SSE41(y + 16, u + 16, v + 16, &R2, &G2, &B2);
163   YUV444ToRGB_SSE41(y + 24, u + 24, v + 24, &R3, &G3, &B3);
164 
165   // Cast to 8b and store as BBBBGGGGRRRR.
166   bgr0 = _mm_packus_epi16(B0, B1);
167   bgr1 = _mm_packus_epi16(B2, B3);
168   bgr2 = _mm_packus_epi16(G0, G1);
169   bgr3 = _mm_packus_epi16(G2, G3);
170   bgr4 = _mm_packus_epi16(R0, R1);
171   bgr5= _mm_packus_epi16(R2, R3);
172 
173   // Pack as BGRBGRBGRBGR.
174   PlanarTo24b_SSE41(&bgr0, &bgr1, &bgr2, &bgr3, &bgr4, &bgr5, dst);
175 }
176 
177 //-----------------------------------------------------------------------------
178 // Arbitrary-length row conversion functions
179 
YuvToRgbRow_SSE41(const uint8_t * y,const uint8_t * u,const uint8_t * v,uint8_t * dst,int len)180 static void YuvToRgbRow_SSE41(const uint8_t* y,
181                               const uint8_t* u, const uint8_t* v,
182                               uint8_t* dst, int len) {
183   int n;
184   for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) {
185     __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
186     __m128i rgb0, rgb1, rgb2, rgb3, rgb4, rgb5;
187 
188     YUV420ToRGB_SSE41(y +  0, u +  0, v +  0, &R0, &G0, &B0);
189     YUV420ToRGB_SSE41(y +  8, u +  4, v +  4, &R1, &G1, &B1);
190     YUV420ToRGB_SSE41(y + 16, u +  8, v +  8, &R2, &G2, &B2);
191     YUV420ToRGB_SSE41(y + 24, u + 12, v + 12, &R3, &G3, &B3);
192 
193     // Cast to 8b and store as RRRRGGGGBBBB.
194     rgb0 = _mm_packus_epi16(R0, R1);
195     rgb1 = _mm_packus_epi16(R2, R3);
196     rgb2 = _mm_packus_epi16(G0, G1);
197     rgb3 = _mm_packus_epi16(G2, G3);
198     rgb4 = _mm_packus_epi16(B0, B1);
199     rgb5 = _mm_packus_epi16(B2, B3);
200 
201     // Pack as RGBRGBRGBRGB.
202     PlanarTo24b_SSE41(&rgb0, &rgb1, &rgb2, &rgb3, &rgb4, &rgb5, dst);
203 
204     y += 32;
205     u += 16;
206     v += 16;
207   }
208   for (; n < len; ++n) {   // Finish off
209     VP8YuvToRgb(y[0], u[0], v[0], dst);
210     dst += 3;
211     y += 1;
212     u += (n & 1);
213     v += (n & 1);
214   }
215 }
216 
YuvToBgrRow_SSE41(const uint8_t * y,const uint8_t * u,const uint8_t * v,uint8_t * dst,int len)217 static void YuvToBgrRow_SSE41(const uint8_t* y,
218                               const uint8_t* u, const uint8_t* v,
219                               uint8_t* dst, int len) {
220   int n;
221   for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) {
222     __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
223     __m128i bgr0, bgr1, bgr2, bgr3, bgr4, bgr5;
224 
225     YUV420ToRGB_SSE41(y +  0, u +  0, v +  0, &R0, &G0, &B0);
226     YUV420ToRGB_SSE41(y +  8, u +  4, v +  4, &R1, &G1, &B1);
227     YUV420ToRGB_SSE41(y + 16, u +  8, v +  8, &R2, &G2, &B2);
228     YUV420ToRGB_SSE41(y + 24, u + 12, v + 12, &R3, &G3, &B3);
229 
230     // Cast to 8b and store as BBBBGGGGRRRR.
231     bgr0 = _mm_packus_epi16(B0, B1);
232     bgr1 = _mm_packus_epi16(B2, B3);
233     bgr2 = _mm_packus_epi16(G0, G1);
234     bgr3 = _mm_packus_epi16(G2, G3);
235     bgr4 = _mm_packus_epi16(R0, R1);
236     bgr5 = _mm_packus_epi16(R2, R3);
237 
238     // Pack as BGRBGRBGRBGR.
239     PlanarTo24b_SSE41(&bgr0, &bgr1, &bgr2, &bgr3, &bgr4, &bgr5, dst);
240 
241     y += 32;
242     u += 16;
243     v += 16;
244   }
245   for (; n < len; ++n) {   // Finish off
246     VP8YuvToBgr(y[0], u[0], v[0], dst);
247     dst += 3;
248     y += 1;
249     u += (n & 1);
250     v += (n & 1);
251   }
252 }
253 
254 //------------------------------------------------------------------------------
255 // Entry point
256 
257 extern void WebPInitSamplersSSE41(void);
258 
WebPInitSamplersSSE41(void)259 WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersSSE41(void) {
260   WebPSamplers[MODE_RGB]  = YuvToRgbRow_SSE41;
261   WebPSamplers[MODE_BGR]  = YuvToBgrRow_SSE41;
262 }
263 
264 //------------------------------------------------------------------------------
265 // RGB24/32 -> YUV converters
266 
267 // Load eight 16b-words from *src.
268 #define LOAD_16(src) _mm_loadu_si128((const __m128i*)(src))
269 // Store either 16b-words into *dst
270 #define STORE_16(V, dst) _mm_storeu_si128((__m128i*)(dst), (V))
271 
272 #define WEBP_SSE41_SHUFF(OUT)  do {                  \
273   const __m128i tmp0 = _mm_shuffle_epi8(A0, shuff0); \
274   const __m128i tmp1 = _mm_shuffle_epi8(A1, shuff1); \
275   const __m128i tmp2 = _mm_shuffle_epi8(A2, shuff2); \
276   const __m128i tmp3 = _mm_shuffle_epi8(A3, shuff0); \
277   const __m128i tmp4 = _mm_shuffle_epi8(A4, shuff1); \
278   const __m128i tmp5 = _mm_shuffle_epi8(A5, shuff2); \
279                                                      \
280   /* OR everything to get one channel */             \
281   const __m128i tmp6 = _mm_or_si128(tmp0, tmp1);     \
282   const __m128i tmp7 = _mm_or_si128(tmp3, tmp4);     \
283   out[OUT + 0] = _mm_or_si128(tmp6, tmp2);           \
284   out[OUT + 1] = _mm_or_si128(tmp7, tmp5);           \
285 } while (0);
286 
287 // Unpack the 8b input rgbrgbrgbrgb ... as contiguous registers:
288 // rrrr... rrrr... gggg... gggg... bbbb... bbbb....
289 // Similar to PlanarTo24bHelper(), but in reverse order.
RGB24PackedToPlanar_SSE41(const uint8_t * const rgb,__m128i * const out)290 static WEBP_INLINE void RGB24PackedToPlanar_SSE41(
291     const uint8_t* const rgb, __m128i* const out /*out[6]*/) {
292   const __m128i A0 = _mm_loadu_si128((const __m128i*)(rgb +  0));
293   const __m128i A1 = _mm_loadu_si128((const __m128i*)(rgb + 16));
294   const __m128i A2 = _mm_loadu_si128((const __m128i*)(rgb + 32));
295   const __m128i A3 = _mm_loadu_si128((const __m128i*)(rgb + 48));
296   const __m128i A4 = _mm_loadu_si128((const __m128i*)(rgb + 64));
297   const __m128i A5 = _mm_loadu_si128((const __m128i*)(rgb + 80));
298 
299   // Compute RR.
300   {
301     const __m128i shuff0 = _mm_set_epi8(
302         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 15, 12, 9, 6, 3, 0);
303     const __m128i shuff1 = _mm_set_epi8(
304         -1, -1, -1, -1, -1, 14, 11, 8, 5, 2, -1, -1, -1, -1, -1, -1);
305     const __m128i shuff2 = _mm_set_epi8(
306         13, 10, 7, 4, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1);
307     WEBP_SSE41_SHUFF(0)
308   }
309   // Compute GG.
310   {
311     const __m128i shuff0 = _mm_set_epi8(
312         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 13, 10, 7, 4, 1);
313     const __m128i shuff1 = _mm_set_epi8(
314         -1, -1, -1, -1, -1, 15, 12, 9, 6, 3, 0, -1, -1, -1, -1, -1);
315     const __m128i shuff2 = _mm_set_epi8(
316         14, 11, 8, 5, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1);
317     WEBP_SSE41_SHUFF(2)
318   }
319   // Compute BB.
320   {
321     const __m128i shuff0 = _mm_set_epi8(
322         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 14, 11, 8, 5, 2);
323     const __m128i shuff1 = _mm_set_epi8(
324         -1, -1, -1, -1, -1, -1, 13, 10, 7, 4, 1, -1, -1, -1, -1, -1);
325     const __m128i shuff2 = _mm_set_epi8(
326         15, 12, 9, 6, 3, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1);
327     WEBP_SSE41_SHUFF(4)
328   }
329 }
330 
331 #undef WEBP_SSE41_SHUFF
332 
333 // Convert 8 packed ARGB to r[], g[], b[]
RGB32PackedToPlanar_SSE41(const uint32_t * const argb,__m128i * const rgb)334 static WEBP_INLINE void RGB32PackedToPlanar_SSE41(
335     const uint32_t* const argb, __m128i* const rgb /*in[6]*/) {
336   const __m128i zero = _mm_setzero_si128();
337   __m128i a0 = LOAD_16(argb + 0);
338   __m128i a1 = LOAD_16(argb + 4);
339   __m128i a2 = LOAD_16(argb + 8);
340   __m128i a3 = LOAD_16(argb + 12);
341   VP8L32bToPlanar_SSE41(&a0, &a1, &a2, &a3);
342   rgb[0] = _mm_unpacklo_epi8(a1, zero);
343   rgb[1] = _mm_unpackhi_epi8(a1, zero);
344   rgb[2] = _mm_unpacklo_epi8(a2, zero);
345   rgb[3] = _mm_unpackhi_epi8(a2, zero);
346   rgb[4] = _mm_unpacklo_epi8(a3, zero);
347   rgb[5] = _mm_unpackhi_epi8(a3, zero);
348 }
349 
350 // This macro computes (RG * MULT_RG + GB * MULT_GB + ROUNDER) >> DESCALE_FIX
351 // It's a macro and not a function because we need to use immediate values with
352 // srai_epi32, e.g.
353 #define TRANSFORM(RG_LO, RG_HI, GB_LO, GB_HI, MULT_RG, MULT_GB, \
354                   ROUNDER, DESCALE_FIX, OUT) do {               \
355   const __m128i V0_lo = _mm_madd_epi16(RG_LO, MULT_RG);         \
356   const __m128i V0_hi = _mm_madd_epi16(RG_HI, MULT_RG);         \
357   const __m128i V1_lo = _mm_madd_epi16(GB_LO, MULT_GB);         \
358   const __m128i V1_hi = _mm_madd_epi16(GB_HI, MULT_GB);         \
359   const __m128i V2_lo = _mm_add_epi32(V0_lo, V1_lo);            \
360   const __m128i V2_hi = _mm_add_epi32(V0_hi, V1_hi);            \
361   const __m128i V3_lo = _mm_add_epi32(V2_lo, ROUNDER);          \
362   const __m128i V3_hi = _mm_add_epi32(V2_hi, ROUNDER);          \
363   const __m128i V5_lo = _mm_srai_epi32(V3_lo, DESCALE_FIX);     \
364   const __m128i V5_hi = _mm_srai_epi32(V3_hi, DESCALE_FIX);     \
365   (OUT) = _mm_packs_epi32(V5_lo, V5_hi);                        \
366 } while (0)
367 
368 #define MK_CST_16(A, B) _mm_set_epi16((B), (A), (B), (A), (B), (A), (B), (A))
ConvertRGBToY_SSE41(const __m128i * const R,const __m128i * const G,const __m128i * const B,__m128i * const Y)369 static WEBP_INLINE void ConvertRGBToY_SSE41(const __m128i* const R,
370                                             const __m128i* const G,
371                                             const __m128i* const B,
372                                             __m128i* const Y) {
373   const __m128i kRG_y = MK_CST_16(16839, 33059 - 16384);
374   const __m128i kGB_y = MK_CST_16(16384, 6420);
375   const __m128i kHALF_Y = _mm_set1_epi32((16 << YUV_FIX) + YUV_HALF);
376 
377   const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G);
378   const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G);
379   const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B);
380   const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B);
381   TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_y, kGB_y, kHALF_Y, YUV_FIX, *Y);
382 }
383 
ConvertRGBToUV_SSE41(const __m128i * const R,const __m128i * const G,const __m128i * const B,__m128i * const U,__m128i * const V)384 static WEBP_INLINE void ConvertRGBToUV_SSE41(const __m128i* const R,
385                                              const __m128i* const G,
386                                              const __m128i* const B,
387                                              __m128i* const U,
388                                              __m128i* const V) {
389   const __m128i kRG_u = MK_CST_16(-9719, -19081);
390   const __m128i kGB_u = MK_CST_16(0, 28800);
391   const __m128i kRG_v = MK_CST_16(28800, 0);
392   const __m128i kGB_v = MK_CST_16(-24116, -4684);
393   const __m128i kHALF_UV = _mm_set1_epi32(((128 << YUV_FIX) + YUV_HALF) << 2);
394 
395   const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G);
396   const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G);
397   const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B);
398   const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B);
399   TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_u, kGB_u,
400             kHALF_UV, YUV_FIX + 2, *U);
401   TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_v, kGB_v,
402             kHALF_UV, YUV_FIX + 2, *V);
403 }
404 
405 #undef MK_CST_16
406 #undef TRANSFORM
407 
ConvertRGB24ToY_SSE41(const uint8_t * rgb,uint8_t * y,int width)408 static void ConvertRGB24ToY_SSE41(const uint8_t* rgb, uint8_t* y, int width) {
409   const int max_width = width & ~31;
410   int i;
411   for (i = 0; i < max_width; rgb += 3 * 16 * 2) {
412     __m128i rgb_plane[6];
413     int j;
414 
415     RGB24PackedToPlanar_SSE41(rgb, rgb_plane);
416 
417     for (j = 0; j < 2; ++j, i += 16) {
418       const __m128i zero = _mm_setzero_si128();
419       __m128i r, g, b, Y0, Y1;
420 
421       // Convert to 16-bit Y.
422       r = _mm_unpacklo_epi8(rgb_plane[0 + j], zero);
423       g = _mm_unpacklo_epi8(rgb_plane[2 + j], zero);
424       b = _mm_unpacklo_epi8(rgb_plane[4 + j], zero);
425       ConvertRGBToY_SSE41(&r, &g, &b, &Y0);
426 
427       // Convert to 16-bit Y.
428       r = _mm_unpackhi_epi8(rgb_plane[0 + j], zero);
429       g = _mm_unpackhi_epi8(rgb_plane[2 + j], zero);
430       b = _mm_unpackhi_epi8(rgb_plane[4 + j], zero);
431       ConvertRGBToY_SSE41(&r, &g, &b, &Y1);
432 
433       // Cast to 8-bit and store.
434       STORE_16(_mm_packus_epi16(Y0, Y1), y + i);
435     }
436   }
437   for (; i < width; ++i, rgb += 3) {   // left-over
438     y[i] = VP8RGBToY(rgb[0], rgb[1], rgb[2], YUV_HALF);
439   }
440 }
441 
ConvertBGR24ToY_SSE41(const uint8_t * bgr,uint8_t * y,int width)442 static void ConvertBGR24ToY_SSE41(const uint8_t* bgr, uint8_t* y, int width) {
443   const int max_width = width & ~31;
444   int i;
445   for (i = 0; i < max_width; bgr += 3 * 16 * 2) {
446     __m128i bgr_plane[6];
447     int j;
448 
449     RGB24PackedToPlanar_SSE41(bgr, bgr_plane);
450 
451     for (j = 0; j < 2; ++j, i += 16) {
452       const __m128i zero = _mm_setzero_si128();
453       __m128i r, g, b, Y0, Y1;
454 
455       // Convert to 16-bit Y.
456       b = _mm_unpacklo_epi8(bgr_plane[0 + j], zero);
457       g = _mm_unpacklo_epi8(bgr_plane[2 + j], zero);
458       r = _mm_unpacklo_epi8(bgr_plane[4 + j], zero);
459       ConvertRGBToY_SSE41(&r, &g, &b, &Y0);
460 
461       // Convert to 16-bit Y.
462       b = _mm_unpackhi_epi8(bgr_plane[0 + j], zero);
463       g = _mm_unpackhi_epi8(bgr_plane[2 + j], zero);
464       r = _mm_unpackhi_epi8(bgr_plane[4 + j], zero);
465       ConvertRGBToY_SSE41(&r, &g, &b, &Y1);
466 
467       // Cast to 8-bit and store.
468       STORE_16(_mm_packus_epi16(Y0, Y1), y + i);
469     }
470   }
471   for (; i < width; ++i, bgr += 3) {  // left-over
472     y[i] = VP8RGBToY(bgr[2], bgr[1], bgr[0], YUV_HALF);
473   }
474 }
475 
ConvertARGBToY_SSE41(const uint32_t * argb,uint8_t * y,int width)476 static void ConvertARGBToY_SSE41(const uint32_t* argb, uint8_t* y, int width) {
477   const int max_width = width & ~15;
478   int i;
479   for (i = 0; i < max_width; i += 16) {
480     __m128i Y0, Y1, rgb[6];
481     RGB32PackedToPlanar_SSE41(&argb[i], rgb);
482     ConvertRGBToY_SSE41(&rgb[0], &rgb[2], &rgb[4], &Y0);
483     ConvertRGBToY_SSE41(&rgb[1], &rgb[3], &rgb[5], &Y1);
484     STORE_16(_mm_packus_epi16(Y0, Y1), y + i);
485   }
486   for (; i < width; ++i) {   // left-over
487     const uint32_t p = argb[i];
488     y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >>  0) & 0xff,
489                      YUV_HALF);
490   }
491 }
492 
493 // Horizontal add (doubled) of two 16b values, result is 16b.
494 // in: A | B | C | D | ... -> out: 2*(A+B) | 2*(C+D) | ...
HorizontalAddPack_SSE41(const __m128i * const A,const __m128i * const B,__m128i * const out)495 static void HorizontalAddPack_SSE41(const __m128i* const A,
496                                     const __m128i* const B,
497                                     __m128i* const out) {
498   const __m128i k2 = _mm_set1_epi16(2);
499   const __m128i C = _mm_madd_epi16(*A, k2);
500   const __m128i D = _mm_madd_epi16(*B, k2);
501   *out = _mm_packs_epi32(C, D);
502 }
503 
ConvertARGBToUV_SSE41(const uint32_t * argb,uint8_t * u,uint8_t * v,int src_width,int do_store)504 static void ConvertARGBToUV_SSE41(const uint32_t* argb,
505                                   uint8_t* u, uint8_t* v,
506                                   int src_width, int do_store) {
507   const int max_width = src_width & ~31;
508   int i;
509   for (i = 0; i < max_width; i += 32, u += 16, v += 16) {
510     __m128i rgb[6], U0, V0, U1, V1;
511     RGB32PackedToPlanar_SSE41(&argb[i], rgb);
512     HorizontalAddPack_SSE41(&rgb[0], &rgb[1], &rgb[0]);
513     HorizontalAddPack_SSE41(&rgb[2], &rgb[3], &rgb[2]);
514     HorizontalAddPack_SSE41(&rgb[4], &rgb[5], &rgb[4]);
515     ConvertRGBToUV_SSE41(&rgb[0], &rgb[2], &rgb[4], &U0, &V0);
516 
517     RGB32PackedToPlanar_SSE41(&argb[i + 16], rgb);
518     HorizontalAddPack_SSE41(&rgb[0], &rgb[1], &rgb[0]);
519     HorizontalAddPack_SSE41(&rgb[2], &rgb[3], &rgb[2]);
520     HorizontalAddPack_SSE41(&rgb[4], &rgb[5], &rgb[4]);
521     ConvertRGBToUV_SSE41(&rgb[0], &rgb[2], &rgb[4], &U1, &V1);
522 
523     U0 = _mm_packus_epi16(U0, U1);
524     V0 = _mm_packus_epi16(V0, V1);
525     if (!do_store) {
526       const __m128i prev_u = LOAD_16(u);
527       const __m128i prev_v = LOAD_16(v);
528       U0 = _mm_avg_epu8(U0, prev_u);
529       V0 = _mm_avg_epu8(V0, prev_v);
530     }
531     STORE_16(U0, u);
532     STORE_16(V0, v);
533   }
534   if (i < src_width) {  // left-over
535     WebPConvertARGBToUV_C(argb + i, u, v, src_width - i, do_store);
536   }
537 }
538 
539 // Convert 16 packed ARGB 16b-values to r[], g[], b[]
RGBA32PackedToPlanar_16b_SSE41(const uint16_t * const rgbx,__m128i * const r,__m128i * const g,__m128i * const b)540 static WEBP_INLINE void RGBA32PackedToPlanar_16b_SSE41(
541     const uint16_t* const rgbx,
542     __m128i* const r, __m128i* const g, __m128i* const b) {
543   const __m128i in0 = LOAD_16(rgbx +  0);  // r0 | g0 | b0 |x| r1 | g1 | b1 |x
544   const __m128i in1 = LOAD_16(rgbx +  8);  // r2 | g2 | b2 |x| r3 | g3 | b3 |x
545   const __m128i in2 = LOAD_16(rgbx + 16);  // r4 | ...
546   const __m128i in3 = LOAD_16(rgbx + 24);  // r6 | ...
547   // aarrggbb as 16-bit.
548   const __m128i shuff0 =
549       _mm_set_epi8(-1, -1, -1, -1, 13, 12, 5, 4, 11, 10, 3, 2, 9, 8, 1, 0);
550   const __m128i shuff1 =
551       _mm_set_epi8(13, 12, 5, 4, -1, -1, -1, -1, 11, 10, 3, 2, 9, 8, 1, 0);
552   const __m128i A0 = _mm_shuffle_epi8(in0, shuff0);
553   const __m128i A1 = _mm_shuffle_epi8(in1, shuff1);
554   const __m128i A2 = _mm_shuffle_epi8(in2, shuff0);
555   const __m128i A3 = _mm_shuffle_epi8(in3, shuff1);
556   // R0R1G0G1
557   // B0B1****
558   // R2R3G2G3
559   // B2B3****
560   // (OR is used to free port 5 for the unpack)
561   const __m128i B0 = _mm_unpacklo_epi32(A0, A1);
562   const __m128i B1 = _mm_or_si128(A0, A1);
563   const __m128i B2 = _mm_unpacklo_epi32(A2, A3);
564   const __m128i B3 = _mm_or_si128(A2, A3);
565   // Gather the channels.
566   *r = _mm_unpacklo_epi64(B0, B2);
567   *g = _mm_unpackhi_epi64(B0, B2);
568   *b = _mm_unpackhi_epi64(B1, B3);
569 }
570 
ConvertRGBA32ToUV_SSE41(const uint16_t * rgb,uint8_t * u,uint8_t * v,int width)571 static void ConvertRGBA32ToUV_SSE41(const uint16_t* rgb,
572                                     uint8_t* u, uint8_t* v, int width) {
573   const int max_width = width & ~15;
574   const uint16_t* const last_rgb = rgb + 4 * max_width;
575   while (rgb < last_rgb) {
576     __m128i r, g, b, U0, V0, U1, V1;
577     RGBA32PackedToPlanar_16b_SSE41(rgb +  0, &r, &g, &b);
578     ConvertRGBToUV_SSE41(&r, &g, &b, &U0, &V0);
579     RGBA32PackedToPlanar_16b_SSE41(rgb + 32, &r, &g, &b);
580     ConvertRGBToUV_SSE41(&r, &g, &b, &U1, &V1);
581     STORE_16(_mm_packus_epi16(U0, U1), u);
582     STORE_16(_mm_packus_epi16(V0, V1), v);
583     u += 16;
584     v += 16;
585     rgb += 2 * 32;
586   }
587   if (max_width < width) {  // left-over
588     WebPConvertRGBA32ToUV_C(rgb, u, v, width - max_width);
589   }
590 }
591 
592 //------------------------------------------------------------------------------
593 
594 extern void WebPInitConvertARGBToYUVSSE41(void);
595 
WebPInitConvertARGBToYUVSSE41(void)596 WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUVSSE41(void) {
597   WebPConvertARGBToY = ConvertARGBToY_SSE41;
598   WebPConvertARGBToUV = ConvertARGBToUV_SSE41;
599 
600   WebPConvertRGB24ToY = ConvertRGB24ToY_SSE41;
601   WebPConvertBGR24ToY = ConvertBGR24ToY_SSE41;
602 
603   WebPConvertRGBA32ToUV = ConvertRGBA32ToUV_SSE41;
604 }
605 
606 //------------------------------------------------------------------------------
607 
608 #else  // !WEBP_USE_SSE41
609 
610 WEBP_DSP_INIT_STUB(WebPInitSamplersSSE41)
611 WEBP_DSP_INIT_STUB(WebPInitConvertARGBToYUVSSE41)
612 
613 #endif  // WEBP_USE_SSE41
614