OLD | NEW |
---|---|
(Empty) | |
1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "texture_compressor_etc1_sse.h" | |
6 | |
7 #include <assert.h> | |
8 #include <emmintrin.h> | |
9 #include <stdio.h> | |
10 #include <stdlib.h> | |
11 #include <string.h> | |
12 #include <time.h> | |
13 | |
14 #include <cmath> | |
15 #include <limits> | |
16 #include <sstream> | |
17 | |
18 #include "base/compiler_specific.h" | |
19 #include "base/logging.h" | |
20 #include "cc/resources/texture_compressor_util.h" | |
21 | |
22 using namespace cc::texture_compress; | |
23 | |
24 namespace { | |
25 | |
26 #define ETC1_SET_ERROR(x) (x + x / 2 + 384) | |
27 | |
28 struct __sse_data { | |
29 /* raw data */ | |
30 uint8_t* block; | |
31 /* 8 bit packed values */ | |
32 __m128i* packed; | |
33 /* 32 bit zero extended values - 4x4 arrays */ | |
34 __m128i* blue; | |
35 __m128i* green; | |
36 __m128i* red; | |
37 // __m128i *alpha; | |
38 }; | |
39 | |
40 /* commonly used registers */ | |
41 static const __m128i __sse_zero = _mm_set1_epi32(0); | |
42 static const __m128i __sse_max_int = _mm_set1_epi32(0x7FFFFFFF); | |
43 | |
44 inline __m128i AddAndClamp(const __m128i x, const __m128i y) { | |
45 static const __m128i color_max = _mm_set1_epi32(0xFF); | |
46 return _mm_max_epi16(__sse_zero, | |
47 _mm_min_epi16(_mm_add_epi16(x, y), color_max)); | |
48 } | |
49 | |
50 inline __m128i GetColorErrorSSE(const __m128i x, const __m128i y) { | |
51 /* changed from _mm_mullo_epi32 to _mm_mullo_epi16 */ | |
52 __m128i ret = _mm_sub_epi16(x, y); | |
53 return _mm_mullo_epi16(ret, ret); | |
54 } | |
55 | |
56 inline __m128i AddChannelError(const __m128i x, | |
57 const __m128i y, | |
58 const __m128i z) { | |
59 return _mm_add_epi32(x, _mm_add_epi32(y, z)); | |
60 } | |
61 | |
62 inline uint32_t SumSSE(const __m128i x) { | |
63 __m128i sum = _mm_add_epi32(x, _mm_shuffle_epi32(x, 0x4E)); | |
64 sum = _mm_add_epi32(sum, _mm_shuffle_epi32(sum, 0xB1)); | |
65 | |
66 return _mm_cvtsi128_si32(sum); | |
67 } | |
68 | |
69 inline uint32_t GetVerticalError(const __sse_data* data, | |
70 const __m128i* blue_avg, | |
71 const __m128i* green_avg, | |
72 const __m128i* red_avg, | |
73 uint32_t* verror) { | |
74 __m128i error = __sse_zero; | |
75 | |
76 for (int i = 0; i < 4; i++) { | |
77 error = _mm_add_epi32(error, GetColorErrorSSE(data->blue[i], blue_avg[0])); | |
78 error = | |
79 _mm_add_epi32(error, GetColorErrorSSE(data->green[i], green_avg[0])); | |
80 error = _mm_add_epi32(error, GetColorErrorSSE(data->red[i], red_avg[0])); | |
81 } | |
82 | |
83 error = _mm_add_epi32(error, _mm_shuffle_epi32(error, 0x4E)); | |
84 | |
85 verror[0] = _mm_cvtsi128_si32(error); | |
86 verror[1] = _mm_cvtsi128_si32(_mm_shuffle_epi32(error, 0xB1)); | |
87 | |
88 return verror[0] + verror[1]; | |
89 } | |
90 | |
91 inline uint32_t GetHorizontalError(const __sse_data* data, | |
92 const __m128i* blue_avg, | |
93 const __m128i* green_avg, | |
94 const __m128i* red_avg, | |
95 uint32_t* verror) { | |
96 __m128i error = __sse_zero; | |
97 int first_index, second_index; | |
98 | |
99 for (int i = 0; i < 2; i++) { | |
100 first_index = 2 * i; | |
101 second_index = first_index + 1; | |
102 | |
103 error = _mm_add_epi32( | |
104 error, GetColorErrorSSE(data->blue[first_index], blue_avg[i])); | |
105 error = _mm_add_epi32( | |
106 error, GetColorErrorSSE(data->blue[second_index], blue_avg[i])); | |
107 error = _mm_add_epi32( | |
108 error, GetColorErrorSSE(data->green[first_index], green_avg[i])); | |
109 error = _mm_add_epi32( | |
110 error, GetColorErrorSSE(data->green[second_index], green_avg[i])); | |
111 error = _mm_add_epi32(error, | |
112 GetColorErrorSSE(data->red[first_index], red_avg[i])); | |
113 error = _mm_add_epi32( | |
114 error, GetColorErrorSSE(data->red[second_index], red_avg[i])); | |
115 } | |
116 | |
117 error = _mm_add_epi32(error, _mm_shuffle_epi32(error, 0x4E)); | |
118 | |
119 verror[0] = _mm_cvtsi128_si32(error); | |
120 verror[1] = _mm_cvtsi128_si32(_mm_shuffle_epi32(error, 0xB1)); | |
121 | |
122 return verror[0] + verror[1]; | |
123 } | |
124 | |
125 inline void GetAvgColors(const __sse_data* data, | |
126 float* output, | |
127 bool* __sse_use_diff) { | |
128 __m128i sum[2], tmp; | |
129 | |
130 // TODO(radu.velea): _mm_avg_epu8 on packed data maybe | |
131 | |
132 /* get avg red */ | |
133 /* [S0 S0 S1 S1] */ | |
134 sum[0] = _mm_add_epi32(data->red[0], data->red[1]); | |
135 sum[0] = _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0xB1)); | |
136 | |
137 /* [S2 S2 S3 S3] */ | |
138 sum[1] = _mm_add_epi32(data->red[2], data->red[3]); | |
139 sum[1] = _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0xB1)); | |
140 | |
141 float hred[2], vred[2]; | |
142 hred[0] = (_mm_cvtsi128_si32( | |
143 _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0x4E)))) / | |
144 8.0f; | |
145 hred[1] = (_mm_cvtsi128_si32( | |
146 _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0x4E)))) / | |
147 8.0f; | |
148 | |
149 tmp = _mm_add_epi32(sum[0], sum[1]); | |
150 vred[0] = (_mm_cvtsi128_si32(tmp)) / 8.0f; | |
151 vred[1] = (_mm_cvtsi128_si32(_mm_shuffle_epi32(tmp, 0x2))) / 8.0f; | |
152 | |
153 /* get avg green */ | |
154 /* [S0 S0 S1 S1] */ | |
155 sum[0] = _mm_add_epi32(data->green[0], data->green[1]); | |
156 sum[0] = _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0xB1)); | |
157 | |
158 /* [S2 S2 S3 S3] */ | |
159 sum[1] = _mm_add_epi32(data->green[2], data->green[3]); | |
160 sum[1] = _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0xB1)); | |
161 | |
162 float hgreen[2], vgreen[2]; | |
163 hgreen[0] = (_mm_cvtsi128_si32( | |
164 _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0x4E)))) / | |
165 8.0f; | |
166 hgreen[1] = (_mm_cvtsi128_si32( | |
167 _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0x4E)))) / | |
168 8.0f; | |
169 | |
170 tmp = _mm_add_epi32(sum[0], sum[1]); | |
171 vgreen[0] = (_mm_cvtsi128_si32(tmp)) / 8.0f; | |
172 vgreen[1] = (_mm_cvtsi128_si32(_mm_shuffle_epi32(tmp, 0x2))) / 8.0f; | |
173 | |
174 /* get avg blue */ | |
175 /* [S0 S0 S1 S1] */ | |
176 sum[0] = _mm_add_epi32(data->blue[0], data->blue[1]); | |
177 sum[0] = _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0xB1)); | |
178 | |
179 /* [S2 S2 S3 S3] */ | |
180 sum[1] = _mm_add_epi32(data->blue[2], data->blue[3]); | |
181 sum[1] = _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0xB1)); | |
182 | |
183 float hblue[2], vblue[2]; | |
184 hblue[0] = (_mm_cvtsi128_si32( | |
185 _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0x4E)))) / | |
186 8.0f; | |
187 hblue[1] = (_mm_cvtsi128_si32( | |
188 _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0x4E)))) / | |
189 8.0f; | |
190 | |
191 tmp = _mm_add_epi32(sum[0], sum[1]); | |
192 vblue[0] = (_mm_cvtsi128_si32(tmp)) / 8.0f; | |
193 vblue[1] = (_mm_cvtsi128_si32(_mm_shuffle_epi32(tmp, 0x2))) / 8.0f; | |
194 | |
195 /* TODO(radu.velea): return int's instead of floats */ | |
196 output[0] = vblue[0]; | |
197 output[1] = vgreen[0]; | |
198 output[2] = vred[0]; | |
199 | |
200 output[3] = vblue[1]; | |
201 output[4] = vgreen[1]; | |
202 output[5] = vred[1]; | |
203 | |
204 output[6] = hblue[0]; | |
205 output[7] = hgreen[0]; | |
206 output[8] = hred[0]; | |
207 | |
208 output[9] = hblue[1]; | |
209 output[10] = hgreen[1]; | |
210 output[11] = hred[1]; | |
211 | |
212 __m128i threashhold_upper = _mm_set1_epi32(3); | |
robert.bradford
2015/04/28 15:47:04
nit: spelling s/threashold/threshold/g
| |
213 __m128i threashhold_lower = _mm_set1_epi32(-4); | |
214 | |
215 __m128 factor_v = _mm_set1_ps(31.0f / 255.0f); | |
216 __m128 rounding_v = _mm_set1_ps(0.5f); | |
217 __m128 h_avg_0 = _mm_set_ps(hblue[0], hgreen[0], hred[0], 0); | |
218 __m128 h_avg_1 = _mm_set_ps(hblue[1], hgreen[1], hred[1], 0); | |
219 | |
220 __m128 v_avg_0 = _mm_set_ps(vblue[0], vgreen[0], vred[0], 0); | |
221 __m128 v_avg_1 = _mm_set_ps(vblue[1], vgreen[1], vred[1], 0); | |
222 | |
223 h_avg_0 = _mm_mul_ps(h_avg_0, factor_v); | |
224 h_avg_1 = _mm_mul_ps(h_avg_1, factor_v); | |
225 v_avg_0 = _mm_mul_ps(v_avg_0, factor_v); | |
226 v_avg_1 = _mm_mul_ps(v_avg_1, factor_v); | |
227 | |
228 h_avg_0 = _mm_add_ps(h_avg_0, rounding_v); | |
229 h_avg_1 = _mm_add_ps(h_avg_1, rounding_v); | |
230 v_avg_0 = _mm_add_ps(v_avg_0, rounding_v); | |
231 v_avg_1 = _mm_add_ps(v_avg_1, rounding_v); | |
232 | |
233 __m128i h_avg_0i = _mm_cvttps_epi32(h_avg_0); | |
234 __m128i h_avg_1i = _mm_cvttps_epi32(h_avg_1); | |
235 | |
236 __m128i v_avg_0i = _mm_cvttps_epi32(v_avg_0); | |
237 __m128i v_avg_1i = _mm_cvttps_epi32(v_avg_1); | |
238 | |
239 h_avg_0i = _mm_sub_epi32(h_avg_1i, h_avg_0i); | |
240 v_avg_0i = _mm_sub_epi32(v_avg_1i, v_avg_0i); | |
241 | |
242 __sse_use_diff[0] = | |
243 (0 == _mm_movemask_epi8(_mm_cmplt_epi32(v_avg_0i, threashhold_lower))); | |
244 __sse_use_diff[0] &= | |
245 (0 == _mm_movemask_epi8(_mm_cmpgt_epi32(v_avg_0i, threashhold_upper))); | |
246 | |
247 __sse_use_diff[1] = | |
248 (0 == _mm_movemask_epi8(_mm_cmplt_epi32(h_avg_0i, threashhold_lower))); | |
249 __sse_use_diff[1] &= | |
250 (0 == _mm_movemask_epi8(_mm_cmpgt_epi32(h_avg_0i, threashhold_upper))); | |
251 } | |
252 | |
253 void ComputeLuminance(uint8_t* block, | |
254 const Color& base, | |
255 const int sub_block_id, | |
256 const uint8_t* idx_to_num_tab, | |
257 const __sse_data* data, | |
258 const uint32_t expected_error) { | |
259 uint8_t best_tbl_idx = 0; | |
260 uint32_t best_error = 0x7FFFFFFF; | |
261 uint8_t best_mod_idx[8][8]; // [table][texel] | |
262 | |
263 const __m128i base_blue = _mm_set1_epi32(base.channels.b); | |
264 const __m128i base_green = _mm_set1_epi32(base.channels.g); | |
265 const __m128i base_red = _mm_set1_epi32(base.channels.r); | |
266 | |
267 __m128i test_red, test_blue, test_green, tmp, tmp_blue, tmp_green, tmp_red; | |
268 __m128i block_error, mask; | |
269 | |
270 /* this will have the minimum errors for each 4 pixels */ | |
271 __m128i first_half_min; | |
272 __m128i second_half_min; | |
273 | |
274 /* this will have the matching table index combo for each 4 pixels */ | |
275 __m128i first_half_pattern; | |
276 __m128i second_half_pattern; | |
277 | |
278 const __m128i first_blue_data_block = data->blue[2 * sub_block_id]; | |
279 const __m128i first_green_data_block = data->green[2 * sub_block_id]; | |
280 const __m128i first_red_data_block = data->red[2 * sub_block_id]; | |
281 | |
282 const __m128i second_blue_data_block = data->blue[2 * sub_block_id + 1]; | |
283 const __m128i second_green_data_block = data->green[2 * sub_block_id + 1]; | |
284 const __m128i second_red_data_block = data->red[2 * sub_block_id + 1]; | |
285 | |
286 uint32_t min; | |
287 /* fail early to increase speed */ | |
288 long delta = INT32_MAX; | |
289 uint32_t last_min = INT32_MAX; | |
290 | |
291 const uint8_t shuffle_mask[] = { | |
292 0x1B, 0x4E, 0xB1, 0xE4}; /* important they are sorted ascending */ | |
293 | |
294 for (unsigned int tbl_idx = 0; tbl_idx < 8; ++tbl_idx) { | |
295 tmp = _mm_set_epi32( | |
296 g_codeword_tables[tbl_idx][3], g_codeword_tables[tbl_idx][2], | |
297 g_codeword_tables[tbl_idx][1], g_codeword_tables[tbl_idx][0]); | |
298 | |
299 test_blue = AddAndClamp(tmp, base_blue); | |
300 test_green = AddAndClamp(tmp, base_green); | |
301 test_red = AddAndClamp(tmp, base_red); | |
302 | |
303 first_half_min = __sse_max_int; | |
304 second_half_min = __sse_max_int; | |
305 | |
306 first_half_pattern = __sse_zero; | |
307 second_half_pattern = __sse_zero; | |
308 | |
309 for (uint8_t imm8 : shuffle_mask) { | |
310 switch (imm8) { | |
311 case 0x1B: | |
312 tmp_blue = _mm_shuffle_epi32(test_blue, 0x1B); | |
313 tmp_green = _mm_shuffle_epi32(test_green, 0x1B); | |
314 tmp_red = _mm_shuffle_epi32(test_red, 0x1B); | |
315 break; | |
316 case 0x4E: | |
317 tmp_blue = _mm_shuffle_epi32(test_blue, 0x4E); | |
318 tmp_green = _mm_shuffle_epi32(test_green, 0x4E); | |
319 tmp_red = _mm_shuffle_epi32(test_red, 0x4E); | |
320 break; | |
321 case 0xB1: | |
322 tmp_blue = _mm_shuffle_epi32(test_blue, 0xB1); | |
323 tmp_green = _mm_shuffle_epi32(test_green, 0xB1); | |
324 tmp_red = _mm_shuffle_epi32(test_red, 0xB1); | |
325 break; | |
326 case 0xE4: | |
327 tmp_blue = _mm_shuffle_epi32(test_blue, 0xE4); | |
328 tmp_green = _mm_shuffle_epi32(test_green, 0xE4); | |
329 tmp_red = _mm_shuffle_epi32(test_red, 0xE4); | |
330 break; | |
331 default: | |
332 tmp_blue = test_blue; | |
333 tmp_green = test_green; | |
334 tmp_red = test_red; | |
335 } | |
336 | |
337 tmp = _mm_set1_epi32(imm8); | |
338 | |
339 block_error = | |
340 AddChannelError(GetColorErrorSSE(tmp_blue, first_blue_data_block), | |
341 GetColorErrorSSE(tmp_green, first_green_data_block), | |
342 GetColorErrorSSE(tmp_red, first_red_data_block)); | |
343 | |
344 /* save winning pattern */ | |
345 first_half_pattern = _mm_max_epi16( | |
346 first_half_pattern, | |
347 _mm_and_si128(tmp, _mm_cmpgt_epi32(first_half_min, block_error))); | |
348 /* should use _mm_min_epi32(first_half_min, block_error); otherwise | |
349 * performance penalty */ | |
350 mask = _mm_cmplt_epi32(block_error, first_half_min); | |
351 first_half_min = _mm_add_epi32(_mm_and_si128(mask, block_error), | |
352 _mm_andnot_si128(mask, first_half_min)); | |
353 | |
354 /* Second part of the block */ | |
355 block_error = | |
356 AddChannelError(GetColorErrorSSE(tmp_blue, second_blue_data_block), | |
357 GetColorErrorSSE(tmp_green, second_green_data_block), | |
358 GetColorErrorSSE(tmp_red, second_red_data_block)); | |
359 | |
360 /* save winning pattern */ | |
361 second_half_pattern = _mm_max_epi16( | |
362 second_half_pattern, | |
363 _mm_and_si128(tmp, _mm_cmpgt_epi32(second_half_min, block_error))); | |
364 /* should use _mm_min_epi32(second_half_min, block_error); otherwise | |
365 * performance penalty */ | |
366 mask = _mm_cmplt_epi32(block_error, second_half_min); | |
367 second_half_min = _mm_add_epi32(_mm_and_si128(mask, block_error), | |
368 _mm_andnot_si128(mask, second_half_min)); | |
369 } | |
370 | |
371 first_half_min = _mm_add_epi32(first_half_min, second_half_min); | |
372 first_half_min = | |
373 _mm_add_epi32(first_half_min, _mm_shuffle_epi32(first_half_min, 0x4E)); | |
374 first_half_min = | |
375 _mm_add_epi32(first_half_min, _mm_shuffle_epi32(first_half_min, 0xB1)); | |
376 | |
377 min = _mm_cvtsi128_si32(first_half_min); | |
378 | |
379 delta = min - last_min; | |
380 last_min = min; | |
381 | |
382 if (min < best_error) { | |
383 best_tbl_idx = tbl_idx; | |
384 best_error = min; | |
385 | |
386 best_mod_idx[tbl_idx][0] = | |
387 (_mm_cvtsi128_si32(first_half_pattern) >> (0)) & 3; | |
388 best_mod_idx[tbl_idx][4] = | |
389 (_mm_cvtsi128_si32(second_half_pattern) >> (0)) & 3; | |
390 | |
391 best_mod_idx[tbl_idx][1] = | |
392 (_mm_cvtsi128_si32(_mm_shuffle_epi32(first_half_pattern, 0x1)) >> | |
393 (2)) & | |
394 3; | |
395 best_mod_idx[tbl_idx][5] = | |
396 (_mm_cvtsi128_si32(_mm_shuffle_epi32(second_half_pattern, 0x1)) >> | |
397 (2)) & | |
398 3; | |
399 | |
400 best_mod_idx[tbl_idx][2] = | |
401 (_mm_cvtsi128_si32(_mm_shuffle_epi32(first_half_pattern, 0x2)) >> | |
402 (4)) & | |
403 3; | |
404 best_mod_idx[tbl_idx][6] = | |
405 (_mm_cvtsi128_si32(_mm_shuffle_epi32(second_half_pattern, 0x2)) >> | |
406 (4)) & | |
407 3; | |
408 | |
409 best_mod_idx[tbl_idx][3] = | |
410 (_mm_cvtsi128_si32(_mm_shuffle_epi32(first_half_pattern, 0x3)) >> | |
411 (6)) & | |
412 3; | |
413 best_mod_idx[tbl_idx][7] = | |
414 (_mm_cvtsi128_si32(_mm_shuffle_epi32(second_half_pattern, 0x3)) >> | |
415 (6)) & | |
416 3; | |
417 | |
418 if (best_error == 0) { | |
419 break; | |
420 } | |
421 } else if (delta > 0 && expected_error < min) { | |
422 /* error is growing and is well beyond expected error */ | |
423 break; | |
424 } | |
425 } | |
426 | |
427 WriteCodewordTable(block, sub_block_id, best_tbl_idx); | |
428 | |
429 uint32_t pix_data = 0; | |
430 uint8_t mod_idx; | |
431 uint8_t pix_idx; | |
432 uint32_t lsb; | |
433 uint32_t msb; | |
434 int texel_num; | |
435 | |
436 for (unsigned int i = 0; i < 8; ++i) { | |
437 mod_idx = best_mod_idx[best_tbl_idx][i]; | |
438 pix_idx = g_mod_to_pix[mod_idx]; | |
439 | |
440 lsb = pix_idx & 0x1; | |
441 msb = pix_idx >> 1; | |
442 | |
443 // Obtain the texel number as specified in the standard. | |
444 texel_num = idx_to_num_tab[i]; | |
445 pix_data |= msb << (texel_num + 16); | |
446 pix_data |= lsb << (texel_num); | |
447 } | |
448 | |
449 WritePixelData(block, pix_data); | |
450 } | |
451 | |
452 void CompressBlock(uint8_t* dst, __sse_data* data) { | |
453 /* first 3 vertical 1, seconds 3 vertical 2, third 3 horizontal 1, last 3 | |
454 * horizontal 2 */ | |
455 float __sse_avg_colors[12] = { | |
456 0, | |
457 }; | |
458 bool use_differential[2] = {true, true}; | |
459 GetAvgColors(data, __sse_avg_colors, use_differential); | |
460 Color sub_block_avg[4]; | |
461 | |
462 /* TODO(radu.velea): remove floating point operations and use only int's + | |
463 * normal | |
464 * rounding and shifts */ | |
465 for (int i = 0, j = 1; i < 4; i += 2, j += 2) { | |
466 if (use_differential[i / 2] == false) { | |
467 sub_block_avg[i] = MakeColor444(&__sse_avg_colors[i * 3]); | |
468 sub_block_avg[j] = MakeColor444(&__sse_avg_colors[j * 3]); | |
469 } else { | |
470 sub_block_avg[i] = MakeColor555(&__sse_avg_colors[i * 3]); | |
471 sub_block_avg[j] = MakeColor555(&__sse_avg_colors[j * 3]); | |
472 } | |
473 } | |
474 | |
475 __m128i red_avg[2], green_avg[2], blue_avg[2]; | |
476 | |
477 // TODO(radu.velea): perfect accuracy, maybe skip floating variables | |
478 blue_avg[0] = | |
479 _mm_set_epi32((int)__sse_avg_colors[3], (int)__sse_avg_colors[3], | |
480 (int)__sse_avg_colors[0], (int)__sse_avg_colors[0]); | |
481 | |
482 green_avg[0] = | |
483 _mm_set_epi32((int)__sse_avg_colors[4], (int)__sse_avg_colors[4], | |
484 (int)__sse_avg_colors[1], (int)__sse_avg_colors[1]); | |
485 | |
486 red_avg[0] = | |
487 _mm_set_epi32((int)__sse_avg_colors[5], (int)__sse_avg_colors[5], | |
488 (int)__sse_avg_colors[2], (int)__sse_avg_colors[2]); | |
489 | |
490 uint32_t vertical_error[2]; | |
491 GetVerticalError(data, blue_avg, green_avg, red_avg, vertical_error); | |
492 | |
493 // TODO(radu.velea): perfect accuracy, maybe skip floating variables | |
494 blue_avg[0] = _mm_set1_epi32((int)__sse_avg_colors[6]); | |
495 blue_avg[1] = _mm_set1_epi32((int)__sse_avg_colors[9]); | |
496 | |
497 green_avg[0] = _mm_set1_epi32((int)__sse_avg_colors[7]); | |
498 green_avg[1] = _mm_set1_epi32((int)__sse_avg_colors[10]); | |
499 | |
500 red_avg[0] = _mm_set1_epi32((int)__sse_avg_colors[8]); | |
501 red_avg[1] = _mm_set1_epi32((int)__sse_avg_colors[11]); | |
502 | |
503 uint32_t horizontal_error[2]; | |
504 GetHorizontalError(data, blue_avg, green_avg, red_avg, horizontal_error); | |
505 | |
506 bool flip = (horizontal_error[0] + horizontal_error[1]) < | |
507 (vertical_error[0] + vertical_error[1]); | |
508 uint32_t* expected_errors = flip == true ? horizontal_error : vertical_error; | |
509 | |
510 // Clear destination buffer so that we can "or" in the results. | |
511 memset(dst, 0, 8); | |
512 | |
513 WriteDiff(dst, use_differential[!!flip]); | |
514 WriteFlip(dst, flip); | |
515 | |
516 uint8_t sub_block_off_0 = flip ? 2 : 0; | |
517 uint8_t sub_block_off_1 = sub_block_off_0 + 1; | |
518 | |
519 if (use_differential[!!flip]) { | |
520 WriteColors555(dst, sub_block_avg[sub_block_off_0], | |
521 sub_block_avg[sub_block_off_1]); | |
522 } else { | |
523 WriteColors444(dst, sub_block_avg[sub_block_off_0], | |
524 sub_block_avg[sub_block_off_1]); | |
525 } | |
526 | |
527 if (flip == false) { | |
528 /* transpose vertical data into horizontal lines */ | |
529 __m128i tmp; | |
530 for (int i = 0; i < 4; i += 2) { | |
531 tmp = data->blue[i]; | |
532 data->blue[i] = _mm_add_epi32( | |
533 _mm_move_epi64(data->blue[i]), | |
534 _mm_shuffle_epi32(_mm_move_epi64(data->blue[i + 1]), 0x4E)); | |
535 data->blue[i + 1] = _mm_add_epi32( | |
536 _mm_move_epi64(_mm_shuffle_epi32(tmp, 0x4E)), | |
537 _mm_shuffle_epi32( | |
538 _mm_move_epi64(_mm_shuffle_epi32(data->blue[i + 1], 0x4E)), | |
539 0x4E)); | |
540 | |
541 tmp = data->green[i]; | |
542 data->green[i] = _mm_add_epi32( | |
543 _mm_move_epi64(data->green[i]), | |
544 _mm_shuffle_epi32(_mm_move_epi64(data->green[i + 1]), 0x4E)); | |
545 data->green[i + 1] = _mm_add_epi32( | |
546 _mm_move_epi64(_mm_shuffle_epi32(tmp, 0x4E)), | |
547 _mm_shuffle_epi32( | |
548 _mm_move_epi64(_mm_shuffle_epi32(data->green[i + 1], 0x4E)), | |
549 0x4E)); | |
550 | |
551 tmp = data->red[i]; | |
552 data->red[i] = _mm_add_epi32( | |
553 _mm_move_epi64(data->red[i]), | |
554 _mm_shuffle_epi32(_mm_move_epi64(data->red[i + 1]), 0x4E)); | |
555 data->red[i + 1] = _mm_add_epi32( | |
556 _mm_move_epi64(_mm_shuffle_epi32(tmp, 0x4E)), | |
557 _mm_shuffle_epi32( | |
558 _mm_move_epi64(_mm_shuffle_epi32(data->red[i + 1], 0x4E)), 0x4E)); | |
559 } | |
560 | |
561 tmp = data->blue[1]; | |
562 data->blue[1] = data->blue[2]; | |
563 data->blue[2] = tmp; | |
564 | |
565 tmp = data->green[1]; | |
566 data->green[1] = data->green[2]; | |
567 data->green[2] = tmp; | |
568 | |
569 tmp = data->red[1]; | |
570 data->red[1] = data->red[2]; | |
571 data->red[2] = tmp; | |
572 } | |
573 | |
574 // Compute luminance for the first sub block. | |
575 ComputeLuminance(dst, sub_block_avg[sub_block_off_0], 0, | |
576 g_idx_to_num[sub_block_off_0], data, | |
577 ETC1_SET_ERROR(expected_errors[0])); | |
578 // Compute luminance for the second sub block. | |
579 ComputeLuminance(dst, sub_block_avg[sub_block_off_1], 1, | |
580 g_idx_to_num[sub_block_off_1], data, | |
581 ETC1_SET_ERROR(expected_errors[1])); | |
582 } | |
583 | |
584 static void ExtractBlock(uint8_t* dst, const uint8_t* src, int width) { | |
585 for (int j = 0; j < 4; ++j) { | |
586 memcpy(&dst[j * 4 * 4], src, 4 * 4); | |
587 src += width * 4; | |
588 } | |
589 } | |
590 | |
591 inline bool TransposeBlock(uint8_t* block, __m128i* transposed /* [4] */) { | |
592 __m128i tmp3, tmp2, tmp1, tmp0; | |
593 __m128i test_solid = _mm_set1_epi32(*((uint32_t*)block)); | |
594 uint16_t mask = 0xFFFF; | |
595 | |
596 transposed[0] = _mm_loadu_si128((__m128i*)(block)); // a0,a1,a2,...a7, ...a15 | |
597 transposed[1] = | |
598 _mm_loadu_si128((__m128i*)(block + 16)); // b0, b1,b2,...b7.... b15 | |
599 transposed[2] = | |
600 _mm_loadu_si128((__m128i*)(block + 32)); // c0, c1,c2,...c7....c15 | |
601 transposed[3] = | |
602 _mm_loadu_si128((__m128i*)(block + 48)); // d0,d1,d2,...d7....d15 | |
603 | |
604 for (int i = 0; i < 4; i++) { | |
605 mask &= _mm_movemask_epi8(_mm_cmpeq_epi8(transposed[i], test_solid)); | |
606 } | |
607 | |
608 if (mask == 0xFFFF) { | |
609 return false; /* block is solid, no need to do any more work */ | |
610 } | |
611 | |
612 tmp0 = _mm_unpacklo_epi8( | |
613 transposed[0], transposed[1]); // a0,b0, a1,b1, a2,b2, a3,b3,....a7,b7 | |
614 tmp1 = _mm_unpacklo_epi8( | |
615 transposed[2], transposed[3]); // c0,d0, c1,d1, c2,d2, c3,d3,... c7,d7 | |
616 tmp2 = _mm_unpackhi_epi8( | |
617 transposed[0], | |
618 transposed[1]); // a8,b8, a9,b9, a10,b10, a11,b11,...a15,b15 | |
619 tmp3 = _mm_unpackhi_epi8( | |
620 transposed[2], | |
621 transposed[3]); // c8,d8, c9,d9, c10,d10, c11,d11,...c15,d15 | |
622 | |
623 transposed[0] = _mm_unpacklo_epi8( | |
624 tmp0, tmp2); // a0,a8, b0,b8, a1,a9, b1,b9, ....a3,a11, b3,b11 | |
625 transposed[1] = _mm_unpackhi_epi8( | |
626 tmp0, tmp2); // a4,a12, b4,b12, a5,a13, b5,b13,....a7,a15,b7,b15 | |
627 transposed[2] = | |
628 _mm_unpacklo_epi8(tmp1, tmp3); // c0,c8, d0,d8, c1,c9, d1,d9.....d3,d11 | |
629 transposed[3] = _mm_unpackhi_epi8( | |
630 tmp1, tmp3); // c4,c12,d4,d12, c5,c13, d5,d13,....d7,d15 | |
631 | |
632 tmp0 = _mm_unpacklo_epi32(transposed[0], transposed[2]); // a0,a8, b0,b8, | |
633 // c0,c8, d0,d8, | |
634 // a1,a9, b1,b9, | |
635 // c1,c9, d1,d9 | |
636 tmp1 = _mm_unpackhi_epi32(transposed[0], transposed[2]); // a2,a10, b2,b10, | |
637 // c2,c10, d2,d10, | |
638 // a3,a11, b3,b11, | |
639 // c3,c11, d3,d11 | |
640 tmp2 = _mm_unpacklo_epi32(transposed[1], transposed[3]); // a4,a12, b4,b12, | |
641 // c4,c12, d4,d12, | |
642 // a5,a13, b5,b13, | |
643 // c5,c13, d5,d13, | |
644 tmp3 = _mm_unpackhi_epi32(transposed[1], | |
645 transposed[3]); // a6,a14, b6,b14, c6,c14, d6,d14, | |
646 // a7,a15,b7,b15,c7,c15,d7,d15 | |
647 | |
648 transposed[0] = _mm_unpacklo_epi8(tmp0, tmp2); // a0,a4, a8, a12, b0,b4, | |
649 // b8,b12, c0,c4, c8, c12, | |
650 // d0,d4, d8, d12 | |
651 transposed[1] = _mm_unpackhi_epi8(tmp0, tmp2); // a1,a5, a9, a13, b1,b5, | |
652 // b9,b13, c1,c5, c9, c13, | |
653 // d1,d5, d9, d13 | |
654 transposed[2] = _mm_unpacklo_epi8(tmp1, tmp3); // a2,a6, a10,a14, b2,b6, | |
655 // b10,b14, c2,c6, c10,c14, | |
656 // d2,d6, d10,d14 | |
657 transposed[3] = _mm_unpackhi_epi8(tmp1, tmp3); // a3,a7, a11,a15, b3,b7, | |
658 // b11,b15, c3,c7, c11,c15, | |
659 // d3,d7, d11,d15 | |
660 return true; | |
661 } | |
662 | |
663 inline void UnpackBlock(__m128i* packed, | |
664 __m128i* red, | |
665 __m128i* green, | |
666 __m128i* blue, | |
667 __m128i* alpha) { | |
668 const __m128i zero = _mm_set1_epi8(0); | |
669 __m128i tmp_low, tmp_high; | |
670 | |
671 /* unpack red */ | |
672 tmp_low = _mm_unpacklo_epi8(packed[0], zero); | |
673 tmp_high = _mm_unpackhi_epi8(packed[0], zero); | |
674 | |
675 red[0] = _mm_unpacklo_epi16(tmp_low, zero); | |
676 red[1] = _mm_unpackhi_epi16(tmp_low, zero); | |
677 | |
678 red[2] = _mm_unpacklo_epi16(tmp_high, zero); | |
679 red[3] = _mm_unpackhi_epi16(tmp_high, zero); | |
680 | |
681 /* unpack green */ | |
682 tmp_low = _mm_unpacklo_epi8(packed[1], zero); | |
683 tmp_high = _mm_unpackhi_epi8(packed[1], zero); | |
684 | |
685 green[0] = _mm_unpacklo_epi16(tmp_low, zero); | |
686 green[1] = _mm_unpackhi_epi16(tmp_low, zero); | |
687 | |
688 green[2] = _mm_unpacklo_epi16(tmp_high, zero); | |
689 green[3] = _mm_unpackhi_epi16(tmp_high, zero); | |
690 | |
691 /* unpack blue */ | |
692 tmp_low = _mm_unpacklo_epi8(packed[2], zero); | |
693 tmp_high = _mm_unpackhi_epi8(packed[2], zero); | |
694 | |
695 blue[0] = _mm_unpacklo_epi16(tmp_low, zero); | |
696 blue[1] = _mm_unpackhi_epi16(tmp_low, zero); | |
697 | |
698 blue[2] = _mm_unpacklo_epi16(tmp_high, zero); | |
699 blue[3] = _mm_unpackhi_epi16(tmp_high, zero); | |
700 | |
701 /* unpack alpha */ | |
702 tmp_low = _mm_unpacklo_epi8(packed[3], zero); | |
703 tmp_high = _mm_unpackhi_epi8(packed[3], zero); | |
704 | |
705 alpha[0] = _mm_unpacklo_epi16(tmp_low, zero); | |
706 alpha[1] = _mm_unpackhi_epi16(tmp_low, zero); | |
707 | |
708 alpha[2] = _mm_unpacklo_epi16(tmp_high, zero); | |
709 alpha[3] = _mm_unpackhi_epi16(tmp_high, zero); | |
710 } | |
711 | |
712 inline void CompressSolid(uint8_t* dst, uint8_t* block) { | |
713 // Clear destination buffer so that we can "or" in the results. | |
714 memset(dst, 0, 8); | |
715 | |
716 const float src_color_float[3] = {static_cast<float>(block[0]), | |
717 static_cast<float>(block[1]), | |
718 static_cast<float>(block[2])}; | |
719 const Color base = MakeColor555(src_color_float); | |
720 const __m128i base_v = | |
721 _mm_set_epi32(0, base.channels.r, base.channels.g, base.channels.b); | |
722 | |
723 const __m128i constant = _mm_set_epi32(0, block[2], block[1], block[0]); | |
724 __m128i lum; | |
725 __m128i colors[4]; | |
726 static const __m128i rgb = | |
727 _mm_set_epi32(0, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF); | |
728 | |
729 WriteDiff(dst, true); | |
730 WriteFlip(dst, false); | |
731 | |
732 WriteColors555(dst, base, base); | |
733 | |
734 uint8_t best_tbl_idx = 0; | |
735 uint8_t best_mod_idx = 0; | |
736 uint32_t best_mod_err = INT32_MAX; | |
737 | |
738 for (unsigned int tbl_idx = 0; tbl_idx < 8; ++tbl_idx) { | |
739 lum = _mm_set_epi32( | |
740 g_codeword_tables[tbl_idx][3], g_codeword_tables[tbl_idx][2], | |
741 g_codeword_tables[tbl_idx][1], g_codeword_tables[tbl_idx][0]); | |
742 colors[0] = AddAndClamp(base_v, _mm_shuffle_epi32(lum, 0x0)); | |
743 colors[1] = AddAndClamp(base_v, _mm_shuffle_epi32(lum, 0x55)); | |
744 colors[2] = AddAndClamp(base_v, _mm_shuffle_epi32(lum, 0xAA)); | |
745 colors[3] = AddAndClamp(base_v, _mm_shuffle_epi32(lum, 0xFF)); | |
746 | |
747 for (int i = 0; i < 4; i++) { | |
748 uint32_t mod_err = | |
749 SumSSE(GetColorErrorSSE(constant, _mm_and_si128(colors[i], rgb))); | |
750 colors[i] = _mm_and_si128(colors[i], rgb); | |
751 if (mod_err < best_mod_err) { | |
752 best_tbl_idx = tbl_idx; | |
753 best_mod_idx = i; | |
754 best_mod_err = mod_err; | |
755 | |
756 if (mod_err == 0) { | |
757 break; // We cannot do any better than this. | |
758 } | |
759 } | |
760 } | |
761 } | |
762 | |
763 WriteCodewordTable(dst, 0, best_tbl_idx); | |
764 WriteCodewordTable(dst, 1, best_tbl_idx); | |
765 | |
766 uint8_t pix_idx = g_mod_to_pix[best_mod_idx]; | |
767 uint32_t lsb = pix_idx & 0x1; | |
768 uint32_t msb = pix_idx >> 1; | |
769 | |
770 uint32_t pix_data = 0; | |
771 for (unsigned int i = 0; i < 2; ++i) { | |
772 for (unsigned int j = 0; j < 8; ++j) { | |
773 // Obtain the texel number as specified in the standard. | |
774 int texel_num = g_idx_to_num[i][j]; | |
775 pix_data |= msb << (texel_num + 16); | |
776 pix_data |= lsb << (texel_num); | |
777 } | |
778 } | |
779 | |
780 WritePixelData(dst, pix_data); | |
781 } | |
782 | |
783 } // namespace | |
784 | |
785 namespace cc { | |
786 | |
787 void TextureCompressorETC1SSE::Compress(const uint8_t* src, | |
788 uint8_t* dst, | |
789 int width, | |
790 int height, | |
791 Quality quality) { | |
792 DCHECK(width >= 4 && (width & 3) == 0); | |
793 DCHECK(height >= 4 && (height & 3) == 0); | |
794 | |
795 ALIGNAS(16) uint8_t block[64]; | |
796 __m128i packed[4]; | |
797 __m128i red[4], green[4], blue[4], alpha[4]; | |
798 __sse_data data; | |
799 | |
800 for (int y = 0; y < height; y += 4, src += width * 4 * 4) { | |
801 for (int x = 0; x < width; x += 4, dst += 8) { | |
802 ExtractBlock(block, src + x * 4, width); | |
803 if (TransposeBlock(block, packed) == false) { | |
804 CompressSolid(dst, block); | |
805 } else { | |
806 UnpackBlock(packed, blue, green, red, alpha); | |
807 | |
808 data.block = block; | |
809 data.packed = packed; | |
810 data.red = red; | |
811 data.blue = blue; | |
812 data.green = green; | |
813 | |
814 CompressBlock(dst, &data); | |
815 } | |
816 } | |
817 } | |
818 } | |
819 | |
820 } // namespace cc | |
OLD | NEW |