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texturedsp.c
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1 /*
2  * Texture block decompression
3  * Copyright (C) 2009 Benjamin Dobell, Glass Echidna
4  * Copyright (C) 2012 Matthäus G. "Anteru" Chajdas (http://anteru.net)
5  * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the "Software"),
9  * to deal in the Software without restriction, including without limitation
10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11  * and/or sell copies of the Software, and to permit persons to whom the
12  * Software is furnished to do so, subject to the following conditions:
13  * The above copyright notice and this permission notice shall be included
14  * in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22  * IN THE SOFTWARE.
23  */
24 
25 #include <stddef.h>
26 #include <stdint.h>
27 
28 #include "libavutil/attributes.h"
29 #include "libavutil/common.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/libm.h"
32 
33 #include "texturedsp.h"
34 
35 #define RGBA(r, g, b, a) (((uint8_t)(r) << 0) | \
36  ((uint8_t)(g) << 8) | \
37  ((uint8_t)(b) << 16) | \
38  ((unsigned)(uint8_t)(a) << 24))
39 
40 static av_always_inline void extract_color(uint32_t colors[4],
41  uint16_t color0,
42  uint16_t color1,
43  int dxtn, int alpha)
44 {
45  int tmp;
46  uint8_t r0, g0, b0, r1, g1, b1;
47  uint8_t a = dxtn ? 0 : 255;
48 
49  tmp = (color0 >> 11) * 255 + 16;
50  r0 = (uint8_t) ((tmp / 32 + tmp) / 32);
51  tmp = ((color0 & 0x07E0) >> 5) * 255 + 32;
52  g0 = (uint8_t) ((tmp / 64 + tmp) / 64);
53  tmp = (color0 & 0x001F) * 255 + 16;
54  b0 = (uint8_t) ((tmp / 32 + tmp) / 32);
55 
56  tmp = (color1 >> 11) * 255 + 16;
57  r1 = (uint8_t) ((tmp / 32 + tmp) / 32);
58  tmp = ((color1 & 0x07E0) >> 5) * 255 + 32;
59  g1 = (uint8_t) ((tmp / 64 + tmp) / 64);
60  tmp = (color1 & 0x001F) * 255 + 16;
61  b1 = (uint8_t) ((tmp / 32 + tmp) / 32);
62 
63  if (dxtn || color0 > color1) {
64  colors[0] = RGBA(r0, g0, b0, a);
65  colors[1] = RGBA(r1, g1, b1, a);
66  colors[2] = RGBA((2 * r0 + r1) / 3,
67  (2 * g0 + g1) / 3,
68  (2 * b0 + b1) / 3,
69  a);
70  colors[3] = RGBA((2 * r1 + r0) / 3,
71  (2 * g1 + g0) / 3,
72  (2 * b1 + b0) / 3,
73  a);
74  } else {
75  colors[0] = RGBA(r0, g0, b0, a);
76  colors[1] = RGBA(r1, g1, b1, a);
77  colors[2] = RGBA((r0 + r1) / 2,
78  (g0 + g1) / 2,
79  (b0 + b1) / 2,
80  a);
81  colors[3] = RGBA(0, 0, 0, alpha);
82  }
83 }
84 
85 static inline void dxt1_block_internal(uint8_t *dst, ptrdiff_t stride,
86  const uint8_t *block, uint8_t alpha)
87 {
88  int x, y;
89  uint32_t colors[4];
90  uint16_t color0 = AV_RL16(block + 0);
91  uint16_t color1 = AV_RL16(block + 2);
92  uint32_t code = AV_RL32(block + 4);
93 
94  extract_color(colors, color0, color1, 0, alpha);
95 
96  for (y = 0; y < 4; y++) {
97  for (x = 0; x < 4; x++) {
98  uint32_t pixel = colors[code & 3];
99  code >>= 2;
100  AV_WL32(dst + x * 4, pixel);
101  }
102  dst += stride;
103  }
104 }
105 
106 /**
107  * Decompress one block of a DXT1 texture and store the resulting
108  * RGBA pixels in 'dst'. Alpha component is fully opaque.
109  *
110  * @param dst output buffer.
111  * @param stride scanline in bytes.
112  * @param block block to decompress.
113  * @return how much texture data has been consumed.
114  */
115 static int dxt1_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
116 {
117  dxt1_block_internal(dst, stride, block, 255);
118 
119  return 8;
120 }
121 
122 /**
123  * Decompress one block of a DXT1 with 1-bit alpha texture and store
124  * the resulting RGBA pixels in 'dst'. Alpha is either fully opaque or
125  * fully transparent.
126  *
127  * @param dst output buffer.
128  * @param stride scanline in bytes.
129  * @param block block to decompress.
130  * @return how much texture data has been consumed.
131  */
132 static int dxt1a_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
133 {
134  dxt1_block_internal(dst, stride, block, 0);
135 
136  return 8;
137 }
138 
139 static inline void dxt3_block_internal(uint8_t *dst, ptrdiff_t stride,
140  const uint8_t *block)
141 {
142  int x, y;
143  uint32_t colors[4];
144  uint16_t color0 = AV_RL16(block + 8);
145  uint16_t color1 = AV_RL16(block + 10);
146  uint32_t code = AV_RL32(block + 12);
147 
148  extract_color(colors, color0, color1, 1, 0);
149 
150  for (y = 0; y < 4; y++) {
151  const uint16_t alpha_code = AV_RL16(block + 2 * y);
152  uint8_t alpha_values[4];
153 
154  alpha_values[0] = ((alpha_code >> 0) & 0x0F) * 17;
155  alpha_values[1] = ((alpha_code >> 4) & 0x0F) * 17;
156  alpha_values[2] = ((alpha_code >> 8) & 0x0F) * 17;
157  alpha_values[3] = ((alpha_code >> 12) & 0x0F) * 17;
158 
159  for (x = 0; x < 4; x++) {
160  uint8_t alpha = alpha_values[x];
161  uint32_t pixel = colors[code & 3] | ((unsigned)alpha << 24);
162  code >>= 2;
163 
164  AV_WL32(dst + x * 4, pixel);
165  }
166  dst += stride;
167  }
168 }
169 
170 /** Convert a premultiplied alpha pixel to a straight alpha pixel. */
172 {
173  int r = src[0];
174  int g = src[1];
175  int b = src[2];
176  int a = src[3]; /* unchanged */
177 
178  src[0] = (uint8_t) r * a / 255;
179  src[1] = (uint8_t) g * a / 255;
180  src[2] = (uint8_t) b * a / 255;
181 }
182 
183 /**
184  * Decompress one block of a DXT2 texture and store the resulting
185  * RGBA pixels in 'dst'.
186  *
187  * @param dst output buffer.
188  * @param stride scanline in bytes.
189  * @param block block to decompress.
190  * @return how much texture data has been consumed.
191  */
192 static int dxt2_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
193 {
194  int x, y;
195 
196  dxt3_block_internal(dst, stride, block);
197 
198  /* This format is DXT3, but returns premultiplied alpha. It needs to be
199  * converted because it's what lavc outputs (and swscale expects). */
200  for (y = 0; y < 4; y++)
201  for (x = 0; x < 4; x++)
202  premult2straight(dst + x * 4 + y * stride);
203 
204  return 16;
205 }
206 
207 /**
208  * Decompress one block of a DXT3 texture and store the resulting
209  * RGBA pixels in 'dst'.
210  *
211  * @param dst output buffer.
212  * @param stride scanline in bytes.
213  * @param block block to decompress.
214  * @return how much texture data has been consumed.
215  */
216 static int dxt3_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
217 {
218  dxt3_block_internal(dst, stride, block);
219 
220  return 16;
221 }
222 
223 /**
224  * Decompress a BC 16x3 index block stored as
225  * h g f e
226  * d c b a
227  * p o n m
228  * l k j i
229  *
230  * Bits packed as
231  * | h | g | f | e | d | c | b | a | // Entry
232  * |765 432 107 654 321 076 543 210| // Bit
233  * |0000000000111111111112222222222| // Byte
234  *
235  * into 16 8-bit indices.
236  */
237 static void decompress_indices(uint8_t *dst, const uint8_t *src)
238 {
239  int block, i;
240 
241  for (block = 0; block < 2; block++) {
242  int tmp = AV_RL24(src);
243 
244  /* Unpack 8x3 bit from last 3 byte block */
245  for (i = 0; i < 8; i++)
246  dst[i] = (tmp >> (i * 3)) & 0x7;
247 
248  src += 3;
249  dst += 8;
250  }
251 }
252 
253 static inline void dxt5_block_internal(uint8_t *dst, ptrdiff_t stride,
254  const uint8_t *block)
255 {
256  int x, y;
257  uint32_t colors[4];
258  uint8_t alpha_indices[16];
259  uint16_t color0 = AV_RL16(block + 8);
260  uint16_t color1 = AV_RL16(block + 10);
261  uint32_t code = AV_RL32(block + 12);
262  uint8_t alpha0 = *(block);
263  uint8_t alpha1 = *(block + 1);
264 
265  decompress_indices(alpha_indices, block + 2);
266 
267  extract_color(colors, color0, color1, 1, 0);
268 
269  for (y = 0; y < 4; y++) {
270  for (x = 0; x < 4; x++) {
271  int alpha_code = alpha_indices[x + y * 4];
272  uint32_t pixel;
273  uint8_t alpha;
274 
275  if (alpha_code == 0) {
276  alpha = alpha0;
277  } else if (alpha_code == 1) {
278  alpha = alpha1;
279  } else {
280  if (alpha0 > alpha1) {
281  alpha = (uint8_t) (((8 - alpha_code) * alpha0 +
282  (alpha_code - 1) * alpha1) / 7);
283  } else {
284  if (alpha_code == 6) {
285  alpha = 0;
286  } else if (alpha_code == 7) {
287  alpha = 255;
288  } else {
289  alpha = (uint8_t) (((6 - alpha_code) * alpha0 +
290  (alpha_code - 1) * alpha1) / 5);
291  }
292  }
293  }
294  pixel = colors[code & 3] | ((unsigned)alpha << 24);
295  code >>= 2;
296  AV_WL32(dst + x * 4, pixel);
297  }
298  dst += stride;
299  }
300 }
301 
302 /**
303  * Decompress one block of a DXT4 texture and store the resulting
304  * RGBA pixels in 'dst'.
305  *
306  * @param dst output buffer.
307  * @param stride scanline in bytes.
308  * @param block block to decompress.
309  * @return how much texture data has been consumed.
310  */
311 static int dxt4_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
312 {
313  int x, y;
314 
315  dxt5_block_internal(dst, stride, block);
316 
317  /* This format is DXT5, but returns premultiplied alpha. It needs to be
318  * converted because it's what lavc outputs (and swscale expects). */
319  for (y = 0; y < 4; y++)
320  for (x = 0; x < 4; x++)
321  premult2straight(dst + x * 4 + y * stride);
322 
323  return 16;
324 }
325 
326 /**
327  * Decompress one block of a DXT5 texture and store the resulting
328  * RGBA pixels in 'dst'.
329  *
330  * @param dst output buffer.
331  * @param stride scanline in bytes.
332  * @param block block to decompress.
333  * @return how much texture data has been consumed.
334  */
335 static int dxt5_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
336 {
337  dxt5_block_internal(dst, stride, block);
338 
339  return 16;
340 }
341 
342 /**
343  * Convert a YCoCg buffer to RGBA.
344  *
345  * @param src input buffer.
346  * @param scaled variant with scaled chroma components and opaque alpha.
347  */
348 static av_always_inline void ycocg2rgba(uint8_t *src, int scaled)
349 {
350  int r = src[0];
351  int g = src[1];
352  int b = src[2];
353  int a = src[3];
354 
355  int s = scaled ? (b >> 3) + 1 : 1;
356  int y = a;
357  int co = (r - 128) / s;
358  int cg = (g - 128) / s;
359 
360  src[0] = av_clip_uint8(y + co - cg);
361  src[1] = av_clip_uint8(y + cg);
362  src[2] = av_clip_uint8(y - co - cg);
363  src[3] = scaled ? 255 : b;
364 }
365 
366 /**
367  * Decompress one block of a DXT5 texture with classic YCoCg and store
368  * the resulting RGBA pixels in 'dst'. Alpha component is fully opaque.
369  *
370  * @param dst output buffer.
371  * @param stride scanline in bytes.
372  * @param block block to decompress.
373  * @return how much texture data has been consumed.
374  */
375 static int dxt5y_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
376 {
377  int x, y;
378 
379  /* This format is basically DXT5, with luma stored in alpha.
380  * Run a normal decompress and then reorder the components. */
381  dxt5_block_internal(dst, stride, block);
382 
383  for (y = 0; y < 4; y++)
384  for (x = 0; x < 4; x++)
385  ycocg2rgba(dst + x * 4 + y * stride, 0);
386 
387  return 16;
388 }
389 
390 /**
391  * Decompress one block of a DXT5 texture with scaled YCoCg and store
392  * the resulting RGBA pixels in 'dst'. Alpha component is fully opaque.
393  *
394  * @param dst output buffer.
395  * @param stride scanline in bytes.
396  * @param block block to decompress.
397  * @return how much texture data has been consumed.
398  */
399 static int dxt5ys_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
400 {
401  int x, y;
402 
403  /* This format is basically DXT5, with luma stored in alpha.
404  * Run a normal decompress and then reorder the components. */
405  dxt5_block_internal(dst, stride, block);
406 
407  for (y = 0; y < 4; y++)
408  for (x = 0; x < 4; x++)
409  ycocg2rgba(dst + x * 4 + y * stride, 1);
410 
411  return 16;
412 }
413 
414 static inline void rgtc_block_internal(uint8_t *dst, ptrdiff_t stride,
415  const uint8_t *block,
416  const int *color_tab, int mono, int offset, int pix_size)
417 {
418  uint8_t indices[16];
419  int x, y;
420 
421  decompress_indices(indices, block + 2);
422 
423  /* Only one or two channels are stored at most, since it only used to
424  * compress specular (black and white) or normal (red and green) maps.
425  * Although the standard says to zero out unused components, many
426  * implementations fill all of them with the same value. */
427  for (y = 0; y < 4; y++) {
428  for (x = 0; x < 4; x++) {
429  int i = indices[x + y * 4];
430  /* Interval expansion from [-1 1] or [0 1] to [0 255]. */
431  int c = color_tab[i];
432 
433  if (mono){
434  dst [x * pix_size + y * stride + offset] = (uint8_t)c;
435  }
436  else{
437  uint32_t pixel = RGBA(c, c, c, 255U);
438  AV_WL32(dst + x * pix_size + y * stride, pixel);
439  }
440  }
441  }
442 }
443 
444 static inline void rgtc1_block_internal(uint8_t *dst, ptrdiff_t stride,
445  const uint8_t *block, int sign, int mono, int offset, int pix_size)
446 {
447  int color_table[8];
448  int r0, r1;
449 
450  if (sign) {
451  /* signed data is in [-128 127] so just offset it to unsigned
452  * and it can be treated exactly the same */
453  r0 = ((int8_t) block[0]) + 128;
454  r1 = ((int8_t) block[1]) + 128;
455  } else {
456  r0 = block[0];
457  r1 = block[1];
458  }
459 
460  color_table[0] = r0;
461  color_table[1] = r1;
462 
463  if (r0 > r1) {
464  /* 6 interpolated color values */
465  color_table[2] = (6 * r0 + 1 * r1) / 7; // bit code 010
466  color_table[3] = (5 * r0 + 2 * r1) / 7; // bit code 011
467  color_table[4] = (4 * r0 + 3 * r1) / 7; // bit code 100
468  color_table[5] = (3 * r0 + 4 * r1) / 7; // bit code 101
469  color_table[6] = (2 * r0 + 5 * r1) / 7; // bit code 110
470  color_table[7] = (1 * r0 + 6 * r1) / 7; // bit code 111
471  } else {
472  /* 4 interpolated color values */
473  color_table[2] = (4 * r0 + 1 * r1) / 5; // bit code 010
474  color_table[3] = (3 * r0 + 2 * r1) / 5; // bit code 011
475  color_table[4] = (2 * r0 + 3 * r1) / 5; // bit code 100
476  color_table[5] = (1 * r0 + 4 * r1) / 5; // bit code 101
477  color_table[6] = 0; /* min range */ // bit code 110
478  color_table[7] = 255; /* max range */ // bit code 111
479  }
480 
481  rgtc_block_internal(dst, stride, block, color_table, mono, offset, pix_size);
482 }
483 
484 /**
485  * Decompress one block of a RGRC1 texture with signed components
486  * and store the resulting RGBA pixels in 'dst'.
487  *
488  * @param dst output buffer.
489  * @param stride scanline in bytes.
490  * @param block block to decompress.
491  * @return how much texture data has been consumed.
492  */
493 static int rgtc1s_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
494 {
495  rgtc1_block_internal(dst, stride, block, 1, 0, 0, 4);
496 
497  return 8;
498 }
499 
500 /**
501  * Decompress one block of a RGRC1 texture with unsigned components
502  * and store the resulting RGBA pixels in 'dst'.
503  *
504  * @param dst output buffer.
505  * @param stride scanline in bytes.
506  * @param block block to decompress.
507  * @return how much texture data has been consumed.
508  */
509 static int rgtc1u_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
510 {
511  rgtc1_block_internal(dst, stride, block, 0, 0, 0, 4);
512 
513  return 8;
514 }
515 
516 /**
517  * Decompress one block of a RGTC1 texture with unsigned components
518  * and overwrite the alpha component in 'dst' (RGBA data).
519  *
520  * @param dst output buffer.
521  * @param stride scanline in bytes.
522  * @param block block to decompress.
523  * @return how much texture data has been consumed.
524  */
525 static int rgtc1u_alpha_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
526 {
527  rgtc1_block_internal(dst, stride, block, 0, 1, 3, 4);
528 
529  return 8;
530 }
531 
532 /**
533  * Decompress one block of a RGTC1 texture with unsigned components
534  * to Gray 8.
535  *
536  * @param dst output buffer.
537  * @param stride scanline in bytes.
538  * @param block block to decompress.
539  * @return how much texture data has been consumed.
540  */
541 static int rgtc1u_gray_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
542 {
543  rgtc1_block_internal(dst, stride, block, 0, 1, 0, 1);
544 
545  return 8;
546 }
547 
548 static inline void rgtc2_block_internal(uint8_t *dst, ptrdiff_t stride,
549  const uint8_t *block, int sign)
550 {
551  /* 4x4 block containing 4 component pixels. */
552  uint8_t c0[4 * 4 * 4];
553  uint8_t c1[4 * 4 * 4];
554  int x, y;
555 
556  /* Decompress the two channels separately and interleave them afterwards. */
557  rgtc1_block_internal(c0, 16, block, sign, 0, 0, 4);
558  rgtc1_block_internal(c1, 16, block + 8, sign, 0, 0, 4);
559 
560  /* B is rebuilt exactly like a normal map. */
561  for (y = 0; y < 4; y++) {
562  for (x = 0; x < 4; x++) {
563  uint8_t *p = dst + x * 4 + y * stride;
564  int r = c0[x * 4 + y * 16];
565  int g = c1[x * 4 + y * 16];
566  int b = 127;
567 
568  int d = (255 * 255 - r * r - g * g) / 2;
569  if (d > 0)
570  b = lrint(sqrtf(d));
571 
572  p[0] = r;
573  p[1] = g;
574  p[2] = b;
575  p[3] = 255;
576  }
577  }
578 }
579 
580 /**
581  * Decompress one block of a RGRC2 texture with signed components
582  * and store the resulting RGBA pixels in 'dst'. Alpha is fully opaque.
583  *
584  * @param dst output buffer.
585  * @param stride scanline in bytes.
586  * @param block block to decompress.
587  * @return how much texture data has been consumed.
588  */
589 static int rgtc2s_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
590 {
591  rgtc2_block_internal(dst, stride, block, 1);
592 
593  return 16;
594 }
595 
596 /**
597  * Decompress one block of a RGRC2 texture with unsigned components
598  * and store the resulting RGBA pixels in 'dst'. Alpha is fully opaque.
599  *
600  * @param dst output buffer.
601  * @param stride scanline in bytes.
602  * @param block block to decompress.
603  * @return how much texture data has been consumed.
604  */
605 static int rgtc2u_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
606 {
607  rgtc2_block_internal(dst, stride, block, 0);
608 
609  return 16;
610 }
611 
612 /**
613  * Decompress one block of a 3Dc texture with unsigned components
614  * and store the resulting RGBA pixels in 'dst'. Alpha is fully opaque.
615  *
616  * @param dst output buffer.
617  * @param stride scanline in bytes.
618  * @param block block to decompress.
619  * @return how much texture data has been consumed.
620  */
621 static int dxn3dc_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
622 {
623  int x, y;
624  rgtc2_block_internal(dst, stride, block, 0);
625 
626  /* This is the 3Dc variant of RGTC2, with swapped R and G. */
627  for (y = 0; y < 4; y++) {
628  for (x = 0; x < 4; x++) {
629  uint8_t *p = dst + x * 4 + y * stride;
630  FFSWAP(uint8_t, p[0], p[1]);
631  }
632  }
633 
634  return 16;
635 }
636 
638 {
639  c->dxt1_block = dxt1_block;
641  c->dxt2_block = dxt2_block;
642  c->dxt3_block = dxt3_block;
643  c->dxt4_block = dxt4_block;
644  c->dxt5_block = dxt5_block;
654 }
static float alpha(float a)
int(* dxt1_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:46
const char * g
Definition: vf_curves.c:112
Texture block (4x4) module.
const char * b
Definition: vf_curves.c:113
#define RGBA(r, g, b, a)
Definition: texturedsp.c:35
static void rgtc2_block_internal(uint8_t *dst, ptrdiff_t stride, const uint8_t *block, int sign)
Definition: texturedsp.c:548
#define src
Definition: vp8dsp.c:254
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
static void dxt3_block_internal(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.c:139
Macro definitions for various function/variable attributes.
static int dxt4_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a DXT4 texture and store the resulting RGBA pixels in 'dst'.
Definition: texturedsp.c:311
static void rgtc1_block_internal(uint8_t *dst, ptrdiff_t stride, const uint8_t *block, int sign, int mono, int offset, int pix_size)
Definition: texturedsp.c:444
static int16_t block[64]
Definition: dct.c:115
static av_always_inline void ycocg2rgba(uint8_t *src, int scaled)
Convert a YCoCg buffer to RGBA.
Definition: texturedsp.c:348
int(* rgtc1u_gray_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:56
uint8_t
#define av_cold
Definition: attributes.h:82
static int dxt3_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a DXT3 texture and store the resulting RGBA pixels in 'dst'.
Definition: texturedsp.c:216
int(* dxt5y_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:52
static const uint64_t c1
Definition: murmur3.c:49
#define U(x)
Definition: vp56_arith.h:37
int(* dxt1a_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:47
int(* dxt4_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:50
static const ColorEntry color_table[]
Definition: xpmdec.c:46
const char * r
Definition: vf_curves.c:111
static int rgtc2u_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a RGRC2 texture with unsigned components and store the resulting RGBA pixels ...
Definition: texturedsp.c:605
static int rgtc1u_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a RGRC1 texture with unsigned components and store the resulting RGBA pixels ...
Definition: texturedsp.c:509
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_RL24
Definition: bytestream.h:87
int(* dxt5_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:51
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
static int rgtc1u_alpha_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a RGTC1 texture with unsigned components and overwrite the alpha component in...
Definition: texturedsp.c:525
static void dxt1_block_internal(uint8_t *dst, ptrdiff_t stride, const uint8_t *block, uint8_t alpha)
Definition: texturedsp.c:85
av_cold void ff_texturedsp_init(TextureDSPContext *c)
Definition: texturedsp.c:637
int(* rgtc1s_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:54
static int rgtc1u_gray_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a RGTC1 texture with unsigned components to Gray 8.
Definition: texturedsp.c:541
static int dxt5y_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a DXT5 texture with classic YCoCg and store the resulting RGBA pixels in 'dst...
Definition: texturedsp.c:375
static av_always_inline void premult2straight(uint8_t *src)
Convert a premultiplied alpha pixel to a straight alpha pixel.
Definition: texturedsp.c:171
static av_always_inline void extract_color(uint32_t colors[4], uint16_t color0, uint16_t color1, int dxtn, int alpha)
Definition: texturedsp.c:40
static int dxt5ys_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a DXT5 texture with scaled YCoCg and store the resulting RGBA pixels in 'dst'...
Definition: texturedsp.c:399
#define s(width, name)
Definition: cbs_vp9.c:257
static void dxt5_block_internal(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.c:253
int(* dxn3dc_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:60
static int rgtc2s_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a RGRC2 texture with signed components and store the resulting RGBA pixels in...
Definition: texturedsp.c:589
Replacements for frequently missing libm functions.
int(* rgtc2u_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:59
int(* dxt3_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:49
uint8_t pixel
Definition: tiny_ssim.c:42
static int dxt2_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a DXT2 texture and store the resulting RGBA pixels in 'dst'.
Definition: texturedsp.c:192
static int dxt5_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a DXT5 texture and store the resulting RGBA pixels in 'dst'.
Definition: texturedsp.c:335
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
common internal and external API header
static double c[64]
static void rgtc_block_internal(uint8_t *dst, ptrdiff_t stride, const uint8_t *block, const int *color_tab, int mono, int offset, int pix_size)
Definition: texturedsp.c:414
int(* rgtc1u_alpha_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:57
int(* rgtc2s_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:58
#define lrint
Definition: tablegen.h:53
#define av_always_inline
Definition: attributes.h:39
#define FFSWAP(type, a, b)
Definition: common.h:99
static int dxn3dc_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a 3Dc texture with unsigned components and store the resulting RGBA pixels in...
Definition: texturedsp.c:621
#define stride
static int rgtc1s_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a RGRC1 texture with signed components and store the resulting RGBA pixels in...
Definition: texturedsp.c:493
static int dxt1a_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a DXT1 with 1-bit alpha texture and store the resulting RGBA pixels in 'dst'...
Definition: texturedsp.c:132
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
int(* dxt5ys_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:53
static void decompress_indices(uint8_t *dst, const uint8_t *src)
Decompress a BC 16x3 index block stored as h g f e d c b a p o n m l k j i.
Definition: texturedsp.c:237
int(* dxt2_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:48
int(* rgtc1u_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:55
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
static int dxt1_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Decompress one block of a DXT1 texture and store the resulting RGBA pixels in 'dst'.
Definition: texturedsp.c:115
static uint8_t tmp[11]
Definition: aes_ctr.c:26