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yuv2rgb_template.c
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1 /*
2  * software YUV to RGB converter
3  *
4  * Copyright (C) 2001-2007 Michael Niedermayer
5  * (c) 2010 Konstantin Shishkov
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #undef MOVNTQ
25 #undef EMMS
26 #undef SFENCE
27 
28 #if COMPILE_TEMPLATE_MMXEXT
29 #define MOVNTQ "movntq"
30 #define SFENCE "sfence"
31 #else
32 #define MOVNTQ "movq"
33 #define SFENCE " # nop"
34 #endif
35 
36 #define REG_BLUE "0"
37 #define REG_RED "1"
38 #define REG_GREEN "2"
39 #define REG_ALPHA "3"
40 
41 #define YUV2RGB_LOOP(depth) \
42  h_size = (c->dstW + 7) & ~7; \
43  if (h_size * depth > FFABS(dstStride[0])) \
44  h_size -= 8; \
45  \
46  vshift = c->srcFormat != AV_PIX_FMT_YUV422P; \
47  \
48  __asm__ volatile ("pxor %mm4, %mm4\n\t"); \
49  for (y = 0; y < srcSliceH; y++) { \
50  uint8_t *image = dst[0] + (y + srcSliceY) * dstStride[0]; \
51  const uint8_t *py = src[0] + y * srcStride[0]; \
52  const uint8_t *pu = src[1] + (y >> vshift) * srcStride[1]; \
53  const uint8_t *pv = src[2] + (y >> vshift) * srcStride[2]; \
54  x86_reg index = -h_size / 2; \
55 
56 #define YUV2RGB_INITIAL_LOAD \
57  __asm__ volatile ( \
58  "movq (%5, %0, 2), %%mm6\n\t" \
59  "movd (%2, %0), %%mm0\n\t" \
60  "movd (%3, %0), %%mm1\n\t" \
61  "1: \n\t" \
62 
63 /* YUV2RGB core
64  * Conversion is performed in usual way:
65  * R = Y' * Ycoef + Vred * V'
66  * G = Y' * Ycoef + Vgreen * V' + Ugreen * U'
67  * B = Y' * Ycoef + Ublue * U'
68  *
69  * where X' = X * 8 - Xoffset (multiplication is performed to increase
70  * precision a bit).
71  * Since it operates in YUV420 colorspace, Y component is additionally
72  * split into Y1 and Y2 for even and odd pixels.
73  *
74  * Input:
75  * mm0 - U (4 elems), mm1 - V (4 elems), mm6 - Y (8 elems), mm4 - zero register
76  * Output:
77  * mm1 - R, mm2 - G, mm0 - B
78  */
79 #define YUV2RGB \
80  /* convert Y, U, V into Y1', Y2', U', V' */ \
81  "movq %%mm6, %%mm7\n\t" \
82  "punpcklbw %%mm4, %%mm0\n\t" \
83  "punpcklbw %%mm4, %%mm1\n\t" \
84  "pand "MANGLE(mmx_00ffw)", %%mm6\n\t" \
85  "psrlw $8, %%mm7\n\t" \
86  "psllw $3, %%mm0\n\t" \
87  "psllw $3, %%mm1\n\t" \
88  "psllw $3, %%mm6\n\t" \
89  "psllw $3, %%mm7\n\t" \
90  "psubsw "U_OFFSET"(%4), %%mm0\n\t" \
91  "psubsw "V_OFFSET"(%4), %%mm1\n\t" \
92  "psubw "Y_OFFSET"(%4), %%mm6\n\t" \
93  "psubw "Y_OFFSET"(%4), %%mm7\n\t" \
94 \
95  /* multiply by coefficients */ \
96  "movq %%mm0, %%mm2\n\t" \
97  "movq %%mm1, %%mm3\n\t" \
98  "pmulhw "UG_COEFF"(%4), %%mm2\n\t" \
99  "pmulhw "VG_COEFF"(%4), %%mm3\n\t" \
100  "pmulhw "Y_COEFF" (%4), %%mm6\n\t" \
101  "pmulhw "Y_COEFF" (%4), %%mm7\n\t" \
102  "pmulhw "UB_COEFF"(%4), %%mm0\n\t" \
103  "pmulhw "VR_COEFF"(%4), %%mm1\n\t" \
104  "paddsw %%mm3, %%mm2\n\t" \
105  /* now: mm0 = UB, mm1 = VR, mm2 = CG */ \
106  /* mm6 = Y1, mm7 = Y2 */ \
107 \
108  /* produce RGB */ \
109  "movq %%mm7, %%mm3\n\t" \
110  "movq %%mm7, %%mm5\n\t" \
111  "paddsw %%mm0, %%mm3\n\t" \
112  "paddsw %%mm1, %%mm5\n\t" \
113  "paddsw %%mm2, %%mm7\n\t" \
114  "paddsw %%mm6, %%mm0\n\t" \
115  "paddsw %%mm6, %%mm1\n\t" \
116  "paddsw %%mm6, %%mm2\n\t" \
117 
118 #define RGB_PACK_INTERLEAVE \
119  /* pack and interleave even/odd pixels */ \
120  "packuswb %%mm1, %%mm0\n\t" \
121  "packuswb %%mm5, %%mm3\n\t" \
122  "packuswb %%mm2, %%mm2\n\t" \
123  "movq %%mm0, %%mm1\n\n" \
124  "packuswb %%mm7, %%mm7\n\t" \
125  "punpcklbw %%mm3, %%mm0\n\t" \
126  "punpckhbw %%mm3, %%mm1\n\t" \
127  "punpcklbw %%mm7, %%mm2\n\t" \
128 
129 #define YUV2RGB_ENDLOOP(depth) \
130  "movq 8 (%5, %0, 2), %%mm6\n\t" \
131  "movd 4 (%3, %0), %%mm1\n\t" \
132  "movd 4 (%2, %0), %%mm0\n\t" \
133  "add $"AV_STRINGIFY(depth * 8)", %1\n\t" \
134  "add $4, %0\n\t" \
135  "js 1b\n\t" \
136 
137 #define YUV2RGB_OPERANDS \
138  : "+r" (index), "+r" (image) \
139  : "r" (pu - index), "r" (pv - index), "r"(&c->redDither), \
140  "r" (py - 2*index) \
141  : "memory" \
142  ); \
143  } \
144 
145 #define YUV2RGB_OPERANDS_ALPHA \
146  : "+r" (index), "+r" (image) \
147  : "r" (pu - index), "r" (pv - index), "r"(&c->redDither), \
148  "r" (py - 2*index), "r" (pa - 2*index) \
149  : "memory" \
150  ); \
151  } \
152 
153 #define YUV2RGB_ENDFUNC \
154  __asm__ volatile (SFENCE"\n\t" \
155  "emms \n\t"); \
156  return srcSliceH; \
157 
158 #define IF0(x)
159 #define IF1(x) x
160 
161 #define RGB_PACK16(gmask, is15) \
162  "pand "MANGLE(mmx_redmask)", %%mm0\n\t" \
163  "pand "MANGLE(mmx_redmask)", %%mm1\n\t" \
164  "movq %%mm2, %%mm3\n\t" \
165  "psllw $"AV_STRINGIFY(3-is15)", %%mm2\n\t" \
166  "psrlw $"AV_STRINGIFY(5+is15)", %%mm3\n\t" \
167  "psrlw $3, %%mm0\n\t" \
168  IF##is15("psrlw $1, %%mm1\n\t") \
169  "pand "MANGLE(pb_e0)", %%mm2\n\t" \
170  "pand "MANGLE(gmask)", %%mm3\n\t" \
171  "por %%mm2, %%mm0\n\t" \
172  "por %%mm3, %%mm1\n\t" \
173  "movq %%mm0, %%mm2\n\t" \
174  "punpcklbw %%mm1, %%mm0\n\t" \
175  "punpckhbw %%mm1, %%mm2\n\t" \
176  MOVNTQ " %%mm0, (%1)\n\t" \
177  MOVNTQ " %%mm2, 8(%1)\n\t" \
178 
179 #define DITHER_RGB \
180  "paddusb "BLUE_DITHER"(%4), %%mm0\n\t" \
181  "paddusb "GREEN_DITHER"(%4), %%mm2\n\t" \
182  "paddusb "RED_DITHER"(%4), %%mm1\n\t" \
183 
184 #if !COMPILE_TEMPLATE_MMXEXT
185 static inline int RENAME(yuv420_rgb15)(SwsContext *c, const uint8_t *src[],
186  int srcStride[],
187  int srcSliceY, int srcSliceH,
188  uint8_t *dst[], int dstStride[])
189 {
190  int y, h_size, vshift;
191 
192  YUV2RGB_LOOP(2)
193 
194 #ifdef DITHER1XBPP
195  c->blueDither = ff_dither8[y & 1];
196  c->greenDither = ff_dither8[y & 1];
197  c->redDither = ff_dither8[(y + 1) & 1];
198 #endif
199 
200  YUV2RGB_INITIAL_LOAD
201  YUV2RGB
202  RGB_PACK_INTERLEAVE
203 #ifdef DITHER1XBPP
204  DITHER_RGB
205 #endif
206  RGB_PACK16(pb_03, 1)
207 
208  YUV2RGB_ENDLOOP(2)
209  YUV2RGB_OPERANDS
210  YUV2RGB_ENDFUNC
211 }
212 
213 static inline int RENAME(yuv420_rgb16)(SwsContext *c, const uint8_t *src[],
214  int srcStride[],
215  int srcSliceY, int srcSliceH,
216  uint8_t *dst[], int dstStride[])
217 {
218  int y, h_size, vshift;
219 
220  YUV2RGB_LOOP(2)
221 
222 #ifdef DITHER1XBPP
223  c->blueDither = ff_dither8[y & 1];
224  c->greenDither = ff_dither4[y & 1];
225  c->redDither = ff_dither8[(y + 1) & 1];
226 #endif
227 
228  YUV2RGB_INITIAL_LOAD
229  YUV2RGB
230  RGB_PACK_INTERLEAVE
231 #ifdef DITHER1XBPP
232  DITHER_RGB
233 #endif
234  RGB_PACK16(pb_07, 0)
235 
236  YUV2RGB_ENDLOOP(2)
237  YUV2RGB_OPERANDS
238  YUV2RGB_ENDFUNC
239 }
240 #endif /* !COMPILE_TEMPLATE_MMXEXT */
241 
242 #define RGB_PACK24(blue, red)\
243  "packuswb %%mm3, %%mm0 \n" /* R0 R2 R4 R6 R1 R3 R5 R7 */\
244  "packuswb %%mm5, %%mm1 \n" /* B0 B2 B4 B6 B1 B3 B5 B7 */\
245  "packuswb %%mm7, %%mm2 \n" /* G0 G2 G4 G6 G1 G3 G5 G7 */\
246  "movq %%mm"red", %%mm3 \n"\
247  "movq %%mm"blue", %%mm6 \n"\
248  "psrlq $32, %%mm"red" \n" /* R1 R3 R5 R7 */\
249  "punpcklbw %%mm2, %%mm3 \n" /* R0 G0 R2 G2 R4 G4 R6 G6 */\
250  "punpcklbw %%mm"red", %%mm6 \n" /* B0 R1 B2 R3 B4 R5 B6 R7 */\
251  "movq %%mm3, %%mm5 \n"\
252  "punpckhbw %%mm"blue", %%mm2 \n" /* G1 B1 G3 B3 G5 B5 G7 B7 */\
253  "punpcklwd %%mm6, %%mm3 \n" /* R0 G0 B0 R1 R2 G2 B2 R3 */\
254  "punpckhwd %%mm6, %%mm5 \n" /* R4 G4 B4 R5 R6 G6 B6 R7 */\
255  RGB_PACK24_B
256 
257 #if COMPILE_TEMPLATE_MMXEXT
258 DECLARE_ASM_CONST(8, int16_t, mask1101[4]) = {-1,-1, 0,-1};
259 DECLARE_ASM_CONST(8, int16_t, mask0010[4]) = { 0, 0,-1, 0};
260 DECLARE_ASM_CONST(8, int16_t, mask0110[4]) = { 0,-1,-1, 0};
261 DECLARE_ASM_CONST(8, int16_t, mask1001[4]) = {-1, 0, 0,-1};
262 DECLARE_ASM_CONST(8, int16_t, mask0100[4]) = { 0,-1, 0, 0};
263 #undef RGB_PACK24_B
264 #define RGB_PACK24_B\
265  "pshufw $0xc6, %%mm2, %%mm1 \n"\
266  "pshufw $0x84, %%mm3, %%mm6 \n"\
267  "pshufw $0x38, %%mm5, %%mm7 \n"\
268  "pand "MANGLE(mask1101)", %%mm6 \n" /* R0 G0 B0 R1 -- -- R2 G2 */\
269  "movq %%mm1, %%mm0 \n"\
270  "pand "MANGLE(mask0110)", %%mm7 \n" /* -- -- R6 G6 B6 R7 -- -- */\
271  "movq %%mm1, %%mm2 \n"\
272  "pand "MANGLE(mask0100)", %%mm1 \n" /* -- -- G3 B3 -- -- -- -- */\
273  "psrlq $48, %%mm3 \n" /* B2 R3 -- -- -- -- -- -- */\
274  "pand "MANGLE(mask0010)", %%mm0 \n" /* -- -- -- -- G1 B1 -- -- */\
275  "psllq $32, %%mm5 \n" /* -- -- -- -- R4 G4 B4 R5 */\
276  "pand "MANGLE(mask1001)", %%mm2 \n" /* G5 B5 -- -- -- -- G7 B7 */\
277  "por %%mm3, %%mm1 \n"\
278  "por %%mm6, %%mm0 \n"\
279  "por %%mm5, %%mm1 \n"\
280  "por %%mm7, %%mm2 \n"\
281  MOVNTQ" %%mm0, (%1) \n"\
282  MOVNTQ" %%mm1, 8(%1) \n"\
283  MOVNTQ" %%mm2, 16(%1) \n"\
284 
285 #else
286 #undef RGB_PACK24_B
287 #define RGB_PACK24_B\
288  "movd %%mm3, (%1) \n" /* R0 G0 B0 R1 */\
289  "movd %%mm2, 4(%1) \n" /* G1 B1 */\
290  "psrlq $32, %%mm3 \n"\
291  "psrlq $16, %%mm2 \n"\
292  "movd %%mm3, 6(%1) \n" /* R2 G2 B2 R3 */\
293  "movd %%mm2, 10(%1) \n" /* G3 B3 */\
294  "psrlq $16, %%mm2 \n"\
295  "movd %%mm5, 12(%1) \n" /* R4 G4 B4 R5 */\
296  "movd %%mm2, 16(%1) \n" /* G5 B5 */\
297  "psrlq $32, %%mm5 \n"\
298  "movd %%mm2, 20(%1) \n" /* -- -- G7 B7 */\
299  "movd %%mm5, 18(%1) \n" /* R6 G6 B6 R7 */\
300 
301 #endif
302 
303 static inline int RENAME(yuv420_rgb24)(SwsContext *c, const uint8_t *src[],
304  int srcStride[],
305  int srcSliceY, int srcSliceH,
306  uint8_t *dst[], int dstStride[])
307 {
308  int y, h_size, vshift;
309 
310  YUV2RGB_LOOP(3)
311 
312  YUV2RGB_INITIAL_LOAD
313  YUV2RGB
314  RGB_PACK24(REG_BLUE, REG_RED)
315 
316  YUV2RGB_ENDLOOP(3)
317  YUV2RGB_OPERANDS
318  YUV2RGB_ENDFUNC
319 }
320 
321 static inline int RENAME(yuv420_bgr24)(SwsContext *c, const uint8_t *src[],
322  int srcStride[],
323  int srcSliceY, int srcSliceH,
324  uint8_t *dst[], int dstStride[])
325 {
326  int y, h_size, vshift;
327 
328  YUV2RGB_LOOP(3)
329 
330  YUV2RGB_INITIAL_LOAD
331  YUV2RGB
332  RGB_PACK24(REG_RED, REG_BLUE)
333 
334  YUV2RGB_ENDLOOP(3)
335  YUV2RGB_OPERANDS
336  YUV2RGB_ENDFUNC
337 }
338 
339 
340 #define SET_EMPTY_ALPHA \
341  "pcmpeqd %%mm"REG_ALPHA", %%mm"REG_ALPHA"\n\t" /* set alpha to 0xFF */ \
342 
343 #define LOAD_ALPHA \
344  "movq (%6, %0, 2), %%mm"REG_ALPHA"\n\t" \
345 
346 #define RGB_PACK32(red, green, blue, alpha) \
347  "movq %%mm"blue", %%mm5\n\t" \
348  "movq %%mm"red", %%mm6\n\t" \
349  "punpckhbw %%mm"green", %%mm5\n\t" \
350  "punpcklbw %%mm"green", %%mm"blue"\n\t" \
351  "punpckhbw %%mm"alpha", %%mm6\n\t" \
352  "punpcklbw %%mm"alpha", %%mm"red"\n\t" \
353  "movq %%mm"blue", %%mm"green"\n\t" \
354  "movq %%mm5, %%mm"alpha"\n\t" \
355  "punpcklwd %%mm"red", %%mm"blue"\n\t" \
356  "punpckhwd %%mm"red", %%mm"green"\n\t" \
357  "punpcklwd %%mm6, %%mm5\n\t" \
358  "punpckhwd %%mm6, %%mm"alpha"\n\t" \
359  MOVNTQ " %%mm"blue", 0(%1)\n\t" \
360  MOVNTQ " %%mm"green", 8(%1)\n\t" \
361  MOVNTQ " %%mm5, 16(%1)\n\t" \
362  MOVNTQ " %%mm"alpha", 24(%1)\n\t" \
363 
364 #if !COMPILE_TEMPLATE_MMXEXT
365 static inline int RENAME(yuv420_rgb32)(SwsContext *c, const uint8_t *src[],
366  int srcStride[],
367  int srcSliceY, int srcSliceH,
368  uint8_t *dst[], int dstStride[])
369 {
370  int y, h_size, vshift;
371 
372  YUV2RGB_LOOP(4)
373 
374  YUV2RGB_INITIAL_LOAD
375  YUV2RGB
376  RGB_PACK_INTERLEAVE
377  SET_EMPTY_ALPHA
378  RGB_PACK32(REG_RED, REG_GREEN, REG_BLUE, REG_ALPHA)
379 
380  YUV2RGB_ENDLOOP(4)
381  YUV2RGB_OPERANDS
382  YUV2RGB_ENDFUNC
383 }
384 
385 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
386 static inline int RENAME(yuva420_rgb32)(SwsContext *c, const uint8_t *src[],
387  int srcStride[],
388  int srcSliceY, int srcSliceH,
389  uint8_t *dst[], int dstStride[])
390 {
391  int y, h_size, vshift;
392 
393  YUV2RGB_LOOP(4)
394 
395  const uint8_t *pa = src[3] + y * srcStride[3];
396  YUV2RGB_INITIAL_LOAD
397  YUV2RGB
398  RGB_PACK_INTERLEAVE
399  LOAD_ALPHA
400  RGB_PACK32(REG_RED, REG_GREEN, REG_BLUE, REG_ALPHA)
401 
402  YUV2RGB_ENDLOOP(4)
403  YUV2RGB_OPERANDS_ALPHA
404  YUV2RGB_ENDFUNC
405 }
406 #endif
407 
408 static inline int RENAME(yuv420_bgr32)(SwsContext *c, const uint8_t *src[],
409  int srcStride[],
410  int srcSliceY, int srcSliceH,
411  uint8_t *dst[], int dstStride[])
412 {
413  int y, h_size, vshift;
414 
415  YUV2RGB_LOOP(4)
416 
417  YUV2RGB_INITIAL_LOAD
418  YUV2RGB
419  RGB_PACK_INTERLEAVE
420  SET_EMPTY_ALPHA
421  RGB_PACK32(REG_BLUE, REG_GREEN, REG_RED, REG_ALPHA)
422 
423  YUV2RGB_ENDLOOP(4)
424  YUV2RGB_OPERANDS
425  YUV2RGB_ENDFUNC
426 }
427 
428 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
429 static inline int RENAME(yuva420_bgr32)(SwsContext *c, const uint8_t *src[],
430  int srcStride[],
431  int srcSliceY, int srcSliceH,
432  uint8_t *dst[], int dstStride[])
433 {
434  int y, h_size, vshift;
435 
436  YUV2RGB_LOOP(4)
437 
438  const uint8_t *pa = src[3] + y * srcStride[3];
439  YUV2RGB_INITIAL_LOAD
440  YUV2RGB
441  RGB_PACK_INTERLEAVE
442  LOAD_ALPHA
443  RGB_PACK32(REG_BLUE, REG_GREEN, REG_RED, REG_ALPHA)
444 
445  YUV2RGB_ENDLOOP(4)
446  YUV2RGB_OPERANDS_ALPHA
447  YUV2RGB_ENDFUNC
448 }
449 #endif
450 
451 #endif /* !COMPILE_TEMPLATE_MMXEXT */
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