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 <stdlib.h>
19#include <smmintrin.h>
20
21#include "src/dsp/common_sse41.h"
22#include "src/utils/utils.h"
23
24//-----------------------------------------------------------------------------
25// Convert spans of 32 pixels to various RGB formats for the fancy upsampler.
26
27// These constants are 14b fixed-point version of ITU-R BT.601 constants.
28// R = (19077 * y + 26149 * v - 14234) >> 6
29// G = (19077 * y - 6419 * u - 13320 * v + 8708) >> 6
30// B = (19077 * y + 33050 * u - 17685) >> 6
31static void ConvertYUV444ToRGB_SSE41(const __m128i* const Y0,
32 const __m128i* const U0,
33 const __m128i* const V0,
34 __m128i* const R,
35 __m128i* const G,
36 __m128i* const B) {
37 const __m128i k19077 = _mm_set1_epi16(19077);
38 const __m128i k26149 = _mm_set1_epi16(26149);
39 const __m128i k14234 = _mm_set1_epi16(14234);
40 // 33050 doesn't fit in a signed short: only use this with unsigned arithmetic
41 const __m128i k33050 = _mm_set1_epi16((short)33050);
42 const __m128i k17685 = _mm_set1_epi16(17685);
43 const __m128i k6419 = _mm_set1_epi16(6419);
44 const __m128i k13320 = _mm_set1_epi16(13320);
45 const __m128i k8708 = _mm_set1_epi16(8708);
46
47 const __m128i Y1 = _mm_mulhi_epu16(*Y0, k19077);
48
49 const __m128i R0 = _mm_mulhi_epu16(*V0, k26149);
50 const __m128i R1 = _mm_sub_epi16(Y1, k14234);
51 const __m128i R2 = _mm_add_epi16(R1, R0);
52
53 const __m128i G0 = _mm_mulhi_epu16(*U0, k6419);
54 const __m128i G1 = _mm_mulhi_epu16(*V0, k13320);
55 const __m128i G2 = _mm_add_epi16(Y1, k8708);
56 const __m128i G3 = _mm_add_epi16(G0, G1);
57 const __m128i G4 = _mm_sub_epi16(G2, G3);
58
59 // be careful with the saturated *unsigned* arithmetic here!
60 const __m128i B0 = _mm_mulhi_epu16(*U0, k33050);
61 const __m128i B1 = _mm_adds_epu16(B0, Y1);
62 const __m128i B2 = _mm_subs_epu16(B1, k17685);
63
64 // use logical shift for B2, which can be larger than 32767
65 *R = _mm_srai_epi16(R2, 6); // range: [-14234, 30815]
66 *G = _mm_srai_epi16(G4, 6); // range: [-10953, 27710]
67 *B = _mm_srli_epi16(B2, 6); // range: [0, 34238]
68}
69
70// Load the bytes into the *upper* part of 16b words. That's "<< 8", basically.
71static WEBP_INLINE __m128i Load_HI_16_SSE41(const uint8_t* src) {
72 const __m128i zero = _mm_setzero_si128();
73 return _mm_unpacklo_epi8(zero, _mm_loadl_epi64((const __m128i*)src));
74}
75
76// Load and replicate the U/V samples
77static WEBP_INLINE __m128i Load_UV_HI_8_SSE41(const uint8_t* src) {
78 const __m128i zero = _mm_setzero_si128();
79 const __m128i tmp0 = _mm_cvtsi32_si128(WebPMemToInt32(src));
80 const __m128i tmp1 = _mm_unpacklo_epi8(zero, tmp0);
81 return _mm_unpacklo_epi16(tmp1, tmp1); // replicate samples
82}
83
84// Convert 32 samples of YUV444 to R/G/B
85static void YUV444ToRGB_SSE41(const uint8_t* const y,
86 const uint8_t* const u,
87 const uint8_t* const v,
88 __m128i* const R, __m128i* const G,
89 __m128i* const B) {
90 const __m128i Y0 = Load_HI_16_SSE41(y), U0 = Load_HI_16_SSE41(u),
91 V0 = Load_HI_16_SSE41(v);
92 ConvertYUV444ToRGB_SSE41(&Y0, &U0, &V0, R, G, B);
93}
94
95// Convert 32 samples of YUV420 to R/G/B
96static void YUV420ToRGB_SSE41(const uint8_t* const y,
97 const uint8_t* const u,
98 const uint8_t* const v,
99 __m128i* const R, __m128i* const G,
100 __m128i* const B) {
101 const __m128i Y0 = Load_HI_16_SSE41(y), U0 = Load_UV_HI_8_SSE41(u),
102 V0 = Load_UV_HI_8_SSE41(v);
103 ConvertYUV444ToRGB_SSE41(&Y0, &U0, &V0, R, G, B);
104}
105
106// Pack the planar buffers
107// rrrr... rrrr... gggg... gggg... bbbb... bbbb....
108// triplet by triplet in the output buffer rgb as rgbrgbrgbrgb ...
109static WEBP_INLINE void PlanarTo24b_SSE41(
110 __m128i* const in0, __m128i* const in1, __m128i* const in2,
111 __m128i* const in3, __m128i* const in4, __m128i* const in5,
112 uint8_t* const rgb) {
113 // The input is 6 registers of sixteen 8b but for the sake of explanation,
114 // let's take 6 registers of four 8b values.
115 // To pack, we will keep taking one every two 8b integer and move it
116 // around as follows:
117 // Input:
118 // r0r1r2r3 | r4r5r6r7 | g0g1g2g3 | g4g5g6g7 | b0b1b2b3 | b4b5b6b7
119 // Split the 6 registers in two sets of 3 registers: the first set as the even
120 // 8b bytes, the second the odd ones:
121 // r0r2r4r6 | g0g2g4g6 | b0b2b4b6 | r1r3r5r7 | g1g3g5g7 | b1b3b5b7
122 // Repeat the same permutations twice more:
123 // r0r4g0g4 | b0b4r1r5 | g1g5b1b5 | r2r6g2g6 | b2b6r3r7 | g3g7b3b7
124 // r0g0b0r1 | g1b1r2g2 | b2r3g3b3 | r4g4b4r5 | g5b5r6g6 | b6r7g7b7
125 VP8PlanarTo24b_SSE41(in0, in1, in2, in3, in4, in5);
126
127 _mm_storeu_si128((__m128i*)(rgb + 0), *in0);
128 _mm_storeu_si128((__m128i*)(rgb + 16), *in1);
129 _mm_storeu_si128((__m128i*)(rgb + 32), *in2);
130 _mm_storeu_si128((__m128i*)(rgb + 48), *in3);
131 _mm_storeu_si128((__m128i*)(rgb + 64), *in4);
132 _mm_storeu_si128((__m128i*)(rgb + 80), *in5);
133}
134
135void VP8YuvToRgb32_SSE41(const uint8_t* y, const uint8_t* u, const uint8_t* v,
136 uint8_t* dst) {
137 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
138 __m128i rgb0, rgb1, rgb2, rgb3, rgb4, rgb5;
139
140 YUV444ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0);
141 YUV444ToRGB_SSE41(y + 8, u + 8, v + 8, &R1, &G1, &B1);
142 YUV444ToRGB_SSE41(y + 16, u + 16, v + 16, &R2, &G2, &B2);
143 YUV444ToRGB_SSE41(y + 24, u + 24, v + 24, &R3, &G3, &B3);
144
145 // Cast to 8b and store as RRRRGGGGBBBB.
146 rgb0 = _mm_packus_epi16(R0, R1);
147 rgb1 = _mm_packus_epi16(R2, R3);
148 rgb2 = _mm_packus_epi16(G0, G1);
149 rgb3 = _mm_packus_epi16(G2, G3);
150 rgb4 = _mm_packus_epi16(B0, B1);
151 rgb5 = _mm_packus_epi16(B2, B3);
152
153 // Pack as RGBRGBRGBRGB.
154 PlanarTo24b_SSE41(&rgb0, &rgb1, &rgb2, &rgb3, &rgb4, &rgb5, dst);
155}
156
157void VP8YuvToBgr32_SSE41(const uint8_t* y, const uint8_t* u, const uint8_t* v,
158 uint8_t* dst) {
159 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
160 __m128i bgr0, bgr1, bgr2, bgr3, bgr4, bgr5;
161
162 YUV444ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0);
163 YUV444ToRGB_SSE41(y + 8, u + 8, v + 8, &R1, &G1, &B1);
164 YUV444ToRGB_SSE41(y + 16, u + 16, v + 16, &R2, &G2, &B2);
165 YUV444ToRGB_SSE41(y + 24, u + 24, v + 24, &R3, &G3, &B3);
166
167 // Cast to 8b and store as BBBBGGGGRRRR.
168 bgr0 = _mm_packus_epi16(B0, B1);
169 bgr1 = _mm_packus_epi16(B2, B3);
170 bgr2 = _mm_packus_epi16(G0, G1);
171 bgr3 = _mm_packus_epi16(G2, G3);
172 bgr4 = _mm_packus_epi16(R0, R1);
173 bgr5= _mm_packus_epi16(R2, R3);
174
175 // Pack as BGRBGRBGRBGR.
176 PlanarTo24b_SSE41(&bgr0, &bgr1, &bgr2, &bgr3, &bgr4, &bgr5, dst);
177}
178
179//-----------------------------------------------------------------------------
180// Arbitrary-length row conversion functions
181
182static void YuvToRgbRow_SSE41(const uint8_t* y,
183 const uint8_t* u, const uint8_t* v,
184 uint8_t* dst, int len) {
185 int n;
186 for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) {
187 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
188 __m128i rgb0, rgb1, rgb2, rgb3, rgb4, rgb5;
189
190 YUV420ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0);
191 YUV420ToRGB_SSE41(y + 8, u + 4, v + 4, &R1, &G1, &B1);
192 YUV420ToRGB_SSE41(y + 16, u + 8, v + 8, &R2, &G2, &B2);
193 YUV420ToRGB_SSE41(y + 24, u + 12, v + 12, &R3, &G3, &B3);
194
195 // Cast to 8b and store as RRRRGGGGBBBB.
196 rgb0 = _mm_packus_epi16(R0, R1);
197 rgb1 = _mm_packus_epi16(R2, R3);
198 rgb2 = _mm_packus_epi16(G0, G1);
199 rgb3 = _mm_packus_epi16(G2, G3);
200 rgb4 = _mm_packus_epi16(B0, B1);
201 rgb5 = _mm_packus_epi16(B2, B3);
202
203 // Pack as RGBRGBRGBRGB.
204 PlanarTo24b_SSE41(&rgb0, &rgb1, &rgb2, &rgb3, &rgb4, &rgb5, dst);
205
206 y += 32;
207 u += 16;
208 v += 16;
209 }
210 for (; n < len; ++n) { // Finish off
211 VP8YuvToRgb(y[0], u[0], v[0], dst);
212 dst += 3;
213 y += 1;
214 u += (n & 1);
215 v += (n & 1);
216 }
217}
218
219static void YuvToBgrRow_SSE41(const uint8_t* y,
220 const uint8_t* u, const uint8_t* v,
221 uint8_t* dst, int len) {
222 int n;
223 for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) {
224 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
225 __m128i bgr0, bgr1, bgr2, bgr3, bgr4, bgr5;
226
227 YUV420ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0);
228 YUV420ToRGB_SSE41(y + 8, u + 4, v + 4, &R1, &G1, &B1);
229 YUV420ToRGB_SSE41(y + 16, u + 8, v + 8, &R2, &G2, &B2);
230 YUV420ToRGB_SSE41(y + 24, u + 12, v + 12, &R3, &G3, &B3);
231
232 // Cast to 8b and store as BBBBGGGGRRRR.
233 bgr0 = _mm_packus_epi16(B0, B1);
234 bgr1 = _mm_packus_epi16(B2, B3);
235 bgr2 = _mm_packus_epi16(G0, G1);
236 bgr3 = _mm_packus_epi16(G2, G3);
237 bgr4 = _mm_packus_epi16(R0, R1);
238 bgr5 = _mm_packus_epi16(R2, R3);
239
240 // Pack as BGRBGRBGRBGR.
241 PlanarTo24b_SSE41(&bgr0, &bgr1, &bgr2, &bgr3, &bgr4, &bgr5, dst);
242
243 y += 32;
244 u += 16;
245 v += 16;
246 }
247 for (; n < len; ++n) { // Finish off
248 VP8YuvToBgr(y[0], u[0], v[0], dst);
249 dst += 3;
250 y += 1;
251 u += (n & 1);
252 v += (n & 1);
253 }
254}
255
256//------------------------------------------------------------------------------
257// Entry point
258
259extern void WebPInitSamplersSSE41(void);
260
261WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersSSE41(void) {
262 WebPSamplers[MODE_RGB] = YuvToRgbRow_SSE41;
263 WebPSamplers[MODE_BGR] = YuvToBgrRow_SSE41;
264}
265
266//------------------------------------------------------------------------------
267// RGB24/32 -> YUV converters
268
269// Load eight 16b-words from *src.
270#define LOAD_16(src) _mm_loadu_si128((const __m128i*)(src))
271// Store either 16b-words into *dst
272#define STORE_16(V, dst) _mm_storeu_si128((__m128i*)(dst), (V))
273
274#define WEBP_SSE41_SHUFF(OUT) do { \
275 const __m128i tmp0 = _mm_shuffle_epi8(A0, shuff0); \
276 const __m128i tmp1 = _mm_shuffle_epi8(A1, shuff1); \
277 const __m128i tmp2 = _mm_shuffle_epi8(A2, shuff2); \
278 const __m128i tmp3 = _mm_shuffle_epi8(A3, shuff0); \
279 const __m128i tmp4 = _mm_shuffle_epi8(A4, shuff1); \
280 const __m128i tmp5 = _mm_shuffle_epi8(A5, shuff2); \
281 \
282 /* OR everything to get one channel */ \
283 const __m128i tmp6 = _mm_or_si128(tmp0, tmp1); \
284 const __m128i tmp7 = _mm_or_si128(tmp3, tmp4); \
285 out[OUT + 0] = _mm_or_si128(tmp6, tmp2); \
286 out[OUT + 1] = _mm_or_si128(tmp7, tmp5); \
287} while (0);
288
289// Unpack the 8b input rgbrgbrgbrgb ... as contiguous registers:
290// rrrr... rrrr... gggg... gggg... bbbb... bbbb....
291// Similar to PlanarTo24bHelper(), but in reverse order.
292static WEBP_INLINE void RGB24PackedToPlanar_SSE41(
293 const uint8_t* const rgb, __m128i* const out /*out[6]*/) {
294 const __m128i A0 = _mm_loadu_si128((const __m128i*)(rgb + 0));
295 const __m128i A1 = _mm_loadu_si128((const __m128i*)(rgb + 16));
296 const __m128i A2 = _mm_loadu_si128((const __m128i*)(rgb + 32));
297 const __m128i A3 = _mm_loadu_si128((const __m128i*)(rgb + 48));
298 const __m128i A4 = _mm_loadu_si128((const __m128i*)(rgb + 64));
299 const __m128i A5 = _mm_loadu_si128((const __m128i*)(rgb + 80));
300
301 // Compute RR.
302 {
303 const __m128i shuff0 = _mm_set_epi8(
304 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 15, 12, 9, 6, 3, 0);
305 const __m128i shuff1 = _mm_set_epi8(
306 -1, -1, -1, -1, -1, 14, 11, 8, 5, 2, -1, -1, -1, -1, -1, -1);
307 const __m128i shuff2 = _mm_set_epi8(
308 13, 10, 7, 4, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1);
309 WEBP_SSE41_SHUFF(0)
310 }
311 // Compute GG.
312 {
313 const __m128i shuff0 = _mm_set_epi8(
314 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 13, 10, 7, 4, 1);
315 const __m128i shuff1 = _mm_set_epi8(
316 -1, -1, -1, -1, -1, 15, 12, 9, 6, 3, 0, -1, -1, -1, -1, -1);
317 const __m128i shuff2 = _mm_set_epi8(
318 14, 11, 8, 5, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1);
319 WEBP_SSE41_SHUFF(2)
320 }
321 // Compute BB.
322 {
323 const __m128i shuff0 = _mm_set_epi8(
324 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 14, 11, 8, 5, 2);
325 const __m128i shuff1 = _mm_set_epi8(
326 -1, -1, -1, -1, -1, -1, 13, 10, 7, 4, 1, -1, -1, -1, -1, -1);
327 const __m128i shuff2 = _mm_set_epi8(
328 15, 12, 9, 6, 3, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1);
329 WEBP_SSE41_SHUFF(4)
330 }
331}
332
333#undef WEBP_SSE41_SHUFF
334
335// Convert 8 packed ARGB to r[], g[], b[]
336static WEBP_INLINE void RGB32PackedToPlanar_SSE41(
337 const uint32_t* const argb, __m128i* const rgb /*in[6]*/) {
338 const __m128i zero = _mm_setzero_si128();
339 __m128i a0 = LOAD_16(argb + 0);
340 __m128i a1 = LOAD_16(argb + 4);
341 __m128i a2 = LOAD_16(argb + 8);
342 __m128i a3 = LOAD_16(argb + 12);
343 VP8L32bToPlanar_SSE41(&a0, &a1, &a2, &a3);
344 rgb[0] = _mm_unpacklo_epi8(a1, zero);
345 rgb[1] = _mm_unpackhi_epi8(a1, zero);
346 rgb[2] = _mm_unpacklo_epi8(a2, zero);
347 rgb[3] = _mm_unpackhi_epi8(a2, zero);
348 rgb[4] = _mm_unpacklo_epi8(a3, zero);
349 rgb[5] = _mm_unpackhi_epi8(a3, zero);
350}
351
352// This macro computes (RG * MULT_RG + GB * MULT_GB + ROUNDER) >> DESCALE_FIX
353// It's a macro and not a function because we need to use immediate values with
354// srai_epi32, e.g.
355#define TRANSFORM(RG_LO, RG_HI, GB_LO, GB_HI, MULT_RG, MULT_GB, \
356 ROUNDER, DESCALE_FIX, OUT) do { \
357 const __m128i V0_lo = _mm_madd_epi16(RG_LO, MULT_RG); \
358 const __m128i V0_hi = _mm_madd_epi16(RG_HI, MULT_RG); \
359 const __m128i V1_lo = _mm_madd_epi16(GB_LO, MULT_GB); \
360 const __m128i V1_hi = _mm_madd_epi16(GB_HI, MULT_GB); \
361 const __m128i V2_lo = _mm_add_epi32(V0_lo, V1_lo); \
362 const __m128i V2_hi = _mm_add_epi32(V0_hi, V1_hi); \
363 const __m128i V3_lo = _mm_add_epi32(V2_lo, ROUNDER); \
364 const __m128i V3_hi = _mm_add_epi32(V2_hi, ROUNDER); \
365 const __m128i V5_lo = _mm_srai_epi32(V3_lo, DESCALE_FIX); \
366 const __m128i V5_hi = _mm_srai_epi32(V3_hi, DESCALE_FIX); \
367 (OUT) = _mm_packs_epi32(V5_lo, V5_hi); \
368} while (0)
369
370#define MK_CST_16(A, B) _mm_set_epi16((B), (A), (B), (A), (B), (A), (B), (A))
371static WEBP_INLINE void ConvertRGBToY_SSE41(const __m128i* const R,
372 const __m128i* const G,
373 const __m128i* const B,
374 __m128i* const Y) {
375 const __m128i kRG_y = MK_CST_16(16839, 33059 - 16384);
376 const __m128i kGB_y = MK_CST_16(16384, 6420);
377 const __m128i kHALF_Y = _mm_set1_epi32((16 << YUV_FIX) + YUV_HALF);
378
379 const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G);
380 const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G);
381 const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B);
382 const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B);
383 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_y, kGB_y, kHALF_Y, YUV_FIX, *Y);
384}
385
386static WEBP_INLINE void ConvertRGBToUV_SSE41(const __m128i* const R,
387 const __m128i* const G,
388 const __m128i* const B,
389 __m128i* const U,
390 __m128i* const V) {
391 const __m128i kRG_u = MK_CST_16(-9719, -19081);
392 const __m128i kGB_u = MK_CST_16(0, 28800);
393 const __m128i kRG_v = MK_CST_16(28800, 0);
394 const __m128i kGB_v = MK_CST_16(-24116, -4684);
395 const __m128i kHALF_UV = _mm_set1_epi32(((128 << YUV_FIX) + YUV_HALF) << 2);
396
397 const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G);
398 const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G);
399 const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B);
400 const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B);
401 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_u, kGB_u,
402 kHALF_UV, YUV_FIX + 2, *U);
403 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_v, kGB_v,
404 kHALF_UV, YUV_FIX + 2, *V);
405}
406
407#undef MK_CST_16
408#undef TRANSFORM
409
410static void ConvertRGB24ToY_SSE41(const uint8_t* rgb, uint8_t* y, int width) {
411 const int max_width = width & ~31;
412 int i;
413 for (i = 0; i < max_width; rgb += 3 * 16 * 2) {
414 __m128i rgb_plane[6];
415 int j;
416
417 RGB24PackedToPlanar_SSE41(rgb, rgb_plane);
418
419 for (j = 0; j < 2; ++j, i += 16) {
420 const __m128i zero = _mm_setzero_si128();
421 __m128i r, g, b, Y0, Y1;
422
423 // Convert to 16-bit Y.
424 r = _mm_unpacklo_epi8(rgb_plane[0 + j], zero);
425 g = _mm_unpacklo_epi8(rgb_plane[2 + j], zero);
426 b = _mm_unpacklo_epi8(rgb_plane[4 + j], zero);
427 ConvertRGBToY_SSE41(&r, &g, &b, &Y0);
428
429 // Convert to 16-bit Y.
430 r = _mm_unpackhi_epi8(rgb_plane[0 + j], zero);
431 g = _mm_unpackhi_epi8(rgb_plane[2 + j], zero);
432 b = _mm_unpackhi_epi8(rgb_plane[4 + j], zero);
433 ConvertRGBToY_SSE41(&r, &g, &b, &Y1);
434
435 // Cast to 8-bit and store.
436 STORE_16(_mm_packus_epi16(Y0, Y1), y + i);
437 }
438 }
439 for (; i < width; ++i, rgb += 3) { // left-over
440 y[i] = VP8RGBToY(rgb[0], rgb[1], rgb[2], YUV_HALF);
441 }
442}
443
444static void ConvertBGR24ToY_SSE41(const uint8_t* bgr, uint8_t* y, int width) {
445 const int max_width = width & ~31;
446 int i;
447 for (i = 0; i < max_width; bgr += 3 * 16 * 2) {
448 __m128i bgr_plane[6];
449 int j;
450
451 RGB24PackedToPlanar_SSE41(bgr, bgr_plane);
452
453 for (j = 0; j < 2; ++j, i += 16) {
454 const __m128i zero = _mm_setzero_si128();
455 __m128i r, g, b, Y0, Y1;
456
457 // Convert to 16-bit Y.
458 b = _mm_unpacklo_epi8(bgr_plane[0 + j], zero);
459 g = _mm_unpacklo_epi8(bgr_plane[2 + j], zero);
460 r = _mm_unpacklo_epi8(bgr_plane[4 + j], zero);
461 ConvertRGBToY_SSE41(&r, &g, &b, &Y0);
462
463 // Convert to 16-bit Y.
464 b = _mm_unpackhi_epi8(bgr_plane[0 + j], zero);
465 g = _mm_unpackhi_epi8(bgr_plane[2 + j], zero);
466 r = _mm_unpackhi_epi8(bgr_plane[4 + j], zero);
467 ConvertRGBToY_SSE41(&r, &g, &b, &Y1);
468
469 // Cast to 8-bit and store.
470 STORE_16(_mm_packus_epi16(Y0, Y1), y + i);
471 }
472 }
473 for (; i < width; ++i, bgr += 3) { // left-over
474 y[i] = VP8RGBToY(bgr[2], bgr[1], bgr[0], YUV_HALF);
475 }
476}
477
478static void ConvertARGBToY_SSE41(const uint32_t* argb, uint8_t* y, int width) {
479 const int max_width = width & ~15;
480 int i;
481 for (i = 0; i < max_width; i += 16) {
482 __m128i Y0, Y1, rgb[6];
483 RGB32PackedToPlanar_SSE41(&argb[i], rgb);
484 ConvertRGBToY_SSE41(&rgb[0], &rgb[2], &rgb[4], &Y0);
485 ConvertRGBToY_SSE41(&rgb[1], &rgb[3], &rgb[5], &Y1);
486 STORE_16(_mm_packus_epi16(Y0, Y1), y + i);
487 }
488 for (; i < width; ++i) { // left-over
489 const uint32_t p = argb[i];
490 y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff,
491 YUV_HALF);
492 }
493}
494
495// Horizontal add (doubled) of two 16b values, result is 16b.
496// in: A | B | C | D | ... -> out: 2*(A+B) | 2*(C+D) | ...
497static void HorizontalAddPack_SSE41(const __m128i* const A,
498 const __m128i* const B,
499 __m128i* const out) {
500 const __m128i k2 = _mm_set1_epi16(2);
501 const __m128i C = _mm_madd_epi16(*A, k2);
502 const __m128i D = _mm_madd_epi16(*B, k2);
503 *out = _mm_packs_epi32(C, D);
504}
505
506static void ConvertARGBToUV_SSE41(const uint32_t* argb,
507 uint8_t* u, uint8_t* v,
508 int src_width, int do_store) {
509 const int max_width = src_width & ~31;
510 int i;
511 for (i = 0; i < max_width; i += 32, u += 16, v += 16) {
512 __m128i rgb[6], U0, V0, U1, V1;
513 RGB32PackedToPlanar_SSE41(&argb[i], rgb);
514 HorizontalAddPack_SSE41(&rgb[0], &rgb[1], &rgb[0]);
515 HorizontalAddPack_SSE41(&rgb[2], &rgb[3], &rgb[2]);
516 HorizontalAddPack_SSE41(&rgb[4], &rgb[5], &rgb[4]);
517 ConvertRGBToUV_SSE41(&rgb[0], &rgb[2], &rgb[4], &U0, &V0);
518
519 RGB32PackedToPlanar_SSE41(&argb[i + 16], rgb);
520 HorizontalAddPack_SSE41(&rgb[0], &rgb[1], &rgb[0]);
521 HorizontalAddPack_SSE41(&rgb[2], &rgb[3], &rgb[2]);
522 HorizontalAddPack_SSE41(&rgb[4], &rgb[5], &rgb[4]);
523 ConvertRGBToUV_SSE41(&rgb[0], &rgb[2], &rgb[4], &U1, &V1);
524
525 U0 = _mm_packus_epi16(U0, U1);
526 V0 = _mm_packus_epi16(V0, V1);
527 if (!do_store) {
528 const __m128i prev_u = LOAD_16(u);
529 const __m128i prev_v = LOAD_16(v);
530 U0 = _mm_avg_epu8(U0, prev_u);
531 V0 = _mm_avg_epu8(V0, prev_v);
532 }
533 STORE_16(U0, u);
534 STORE_16(V0, v);
535 }
536 if (i < src_width) { // left-over
537 WebPConvertARGBToUV_C(argb + i, u, v, src_width - i, do_store);
538 }
539}
540
541// Convert 16 packed ARGB 16b-values to r[], g[], b[]
542static WEBP_INLINE void RGBA32PackedToPlanar_16b_SSE41(
543 const uint16_t* const rgbx,
544 __m128i* const r, __m128i* const g, __m128i* const b) {
545 const __m128i in0 = LOAD_16(rgbx + 0); // r0 | g0 | b0 |x| r1 | g1 | b1 |x
546 const __m128i in1 = LOAD_16(rgbx + 8); // r2 | g2 | b2 |x| r3 | g3 | b3 |x
547 const __m128i in2 = LOAD_16(rgbx + 16); // r4 | ...
548 const __m128i in3 = LOAD_16(rgbx + 24); // r6 | ...
549 // aarrggbb as 16-bit.
550 const __m128i shuff0 =
551 _mm_set_epi8(-1, -1, -1, -1, 13, 12, 5, 4, 11, 10, 3, 2, 9, 8, 1, 0);
552 const __m128i shuff1 =
553 _mm_set_epi8(13, 12, 5, 4, -1, -1, -1, -1, 11, 10, 3, 2, 9, 8, 1, 0);
554 const __m128i A0 = _mm_shuffle_epi8(in0, shuff0);
555 const __m128i A1 = _mm_shuffle_epi8(in1, shuff1);
556 const __m128i A2 = _mm_shuffle_epi8(in2, shuff0);
557 const __m128i A3 = _mm_shuffle_epi8(in3, shuff1);
558 // R0R1G0G1
559 // B0B1****
560 // R2R3G2G3
561 // B2B3****
562 // (OR is used to free port 5 for the unpack)
563 const __m128i B0 = _mm_unpacklo_epi32(A0, A1);
564 const __m128i B1 = _mm_or_si128(A0, A1);
565 const __m128i B2 = _mm_unpacklo_epi32(A2, A3);
566 const __m128i B3 = _mm_or_si128(A2, A3);
567 // Gather the channels.
568 *r = _mm_unpacklo_epi64(B0, B2);
569 *g = _mm_unpackhi_epi64(B0, B2);
570 *b = _mm_unpackhi_epi64(B1, B3);
571}
572
573static void ConvertRGBA32ToUV_SSE41(const uint16_t* rgb,
574 uint8_t* u, uint8_t* v, int width) {
575 const int max_width = width & ~15;
576 const uint16_t* const last_rgb = rgb + 4 * max_width;
577 while (rgb < last_rgb) {
578 __m128i r, g, b, U0, V0, U1, V1;
579 RGBA32PackedToPlanar_16b_SSE41(rgb + 0, &r, &g, &b);
580 ConvertRGBToUV_SSE41(&r, &g, &b, &U0, &V0);
581 RGBA32PackedToPlanar_16b_SSE41(rgb + 32, &r, &g, &b);
582 ConvertRGBToUV_SSE41(&r, &g, &b, &U1, &V1);
583 STORE_16(_mm_packus_epi16(U0, U1), u);
584 STORE_16(_mm_packus_epi16(V0, V1), v);
585 u += 16;
586 v += 16;
587 rgb += 2 * 32;
588 }
589 if (max_width < width) { // left-over
590 WebPConvertRGBA32ToUV_C(rgb, u, v, width - max_width);
591 }
592}
593
594//------------------------------------------------------------------------------
595
596extern void WebPInitConvertARGBToYUVSSE41(void);
597
598WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUVSSE41(void) {
599 WebPConvertARGBToY = ConvertARGBToY_SSE41;
600 WebPConvertARGBToUV = ConvertARGBToUV_SSE41;
601
602 WebPConvertRGB24ToY = ConvertRGB24ToY_SSE41;
603 WebPConvertBGR24ToY = ConvertBGR24ToY_SSE41;
604
605 WebPConvertRGBA32ToUV = ConvertRGBA32ToUV_SSE41;
606}
607
608//------------------------------------------------------------------------------
609
610#else // !WEBP_USE_SSE41
611
612WEBP_DSP_INIT_STUB(WebPInitSamplersSSE41)
613WEBP_DSP_INIT_STUB(WebPInitConvertARGBToYUVSSE41)
614
615#endif // WEBP_USE_SSE41
616