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cavsdsp.c
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1 /*
2  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3  * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
4  *
5  * MMX-optimized DSP functions, based on H.264 optimizations by
6  * Michael Niedermayer and Loren Merritt
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #include "libavutil/attributes.h"
26 #include "libavutil/common.h"
27 #include "libavutil/cpu.h"
28 #include "libavutil/mem_internal.h"
29 #include "libavutil/x86/asm.h"
30 #include "libavutil/x86/cpu.h"
31 #include "libavcodec/cavsdsp.h"
32 #include "libavcodec/idctdsp.h"
33 #include "constants.h"
34 #include "fpel.h"
35 #include "idctdsp.h"
36 #include "config.h"
37 
38 
39 #if HAVE_SSE2_EXTERNAL
40 
41 void ff_cavs_idct8_sse2(int16_t *out, const int16_t *in);
42 
43 static void cavs_idct8_add_sse2(uint8_t *dst, int16_t *block, ptrdiff_t stride)
44 {
45  LOCAL_ALIGNED(16, int16_t, b2, [64]);
46  ff_cavs_idct8_sse2(b2, block);
47  ff_add_pixels_clamped_sse2(b2, dst, stride);
48 }
49 
50 #endif /* HAVE_SSE2_EXTERNAL */
51 
52 #if HAVE_MMXEXT_INLINE
53 
54 DECLARE_ASM_CONST(8, uint64_t, pw_42) = 0x002A002A002A002AULL;
55 DECLARE_ASM_CONST(8, uint64_t, pw_96) = 0x0060006000600060ULL;
56 
57 /*****************************************************************************
58  *
59  * motion compensation
60  *
61  ****************************************************************************/
62 
63 /* vertical filter [-1 -2 96 42 -7 0] */
64 #define QPEL_CAVSV1(A,B,C,D,E,F,OP,ADD, MUL1, MUL2) \
65  "movd (%0), "#F" \n\t"\
66  "movq "#C", %%mm6 \n\t"\
67  "pmullw "MANGLE(MUL1)", %%mm6\n\t"\
68  "movq "#D", %%mm7 \n\t"\
69  "pmullw "MANGLE(MUL2)", %%mm7\n\t"\
70  "psllw $3, "#E" \n\t"\
71  "psubw "#E", %%mm6 \n\t"\
72  "psraw $3, "#E" \n\t"\
73  "paddw %%mm7, %%mm6 \n\t"\
74  "paddw "#E", %%mm6 \n\t"\
75  "paddw "#B", "#B" \n\t"\
76  "pxor %%mm7, %%mm7 \n\t"\
77  "add %2, %0 \n\t"\
78  "punpcklbw %%mm7, "#F" \n\t"\
79  "psubw "#B", %%mm6 \n\t"\
80  "psraw $1, "#B" \n\t"\
81  "psubw "#A", %%mm6 \n\t"\
82  "paddw "MANGLE(ADD)", %%mm6 \n\t"\
83  "psraw $7, %%mm6 \n\t"\
84  "packuswb %%mm6, %%mm6 \n\t"\
85  OP(%%mm6, (%1), A, d) \
86  "add %3, %1 \n\t"
87 
88 /* vertical filter [ 0 -1 5 5 -1 0] */
89 #define QPEL_CAVSV2(A,B,C,D,E,F,OP,ADD, MUL1, MUL2) \
90  "movd (%0), "#F" \n\t"\
91  "movq "#C", %%mm6 \n\t"\
92  "paddw "#D", %%mm6 \n\t"\
93  "pmullw "MANGLE(MUL1)", %%mm6\n\t"\
94  "add %2, %0 \n\t"\
95  "punpcklbw %%mm7, "#F" \n\t"\
96  "psubw "#B", %%mm6 \n\t"\
97  "psubw "#E", %%mm6 \n\t"\
98  "paddw "MANGLE(ADD)", %%mm6 \n\t"\
99  "psraw $3, %%mm6 \n\t"\
100  "packuswb %%mm6, %%mm6 \n\t"\
101  OP(%%mm6, (%1), A, d) \
102  "add %3, %1 \n\t"
103 
104 /* vertical filter [ 0 -7 42 96 -2 -1] */
105 #define QPEL_CAVSV3(A,B,C,D,E,F,OP,ADD, MUL1, MUL2) \
106  "movd (%0), "#F" \n\t"\
107  "movq "#C", %%mm6 \n\t"\
108  "pmullw "MANGLE(MUL2)", %%mm6\n\t"\
109  "movq "#D", %%mm7 \n\t"\
110  "pmullw "MANGLE(MUL1)", %%mm7\n\t"\
111  "psllw $3, "#B" \n\t"\
112  "psubw "#B", %%mm6 \n\t"\
113  "psraw $3, "#B" \n\t"\
114  "paddw %%mm7, %%mm6 \n\t"\
115  "paddw "#B", %%mm6 \n\t"\
116  "paddw "#E", "#E" \n\t"\
117  "pxor %%mm7, %%mm7 \n\t"\
118  "add %2, %0 \n\t"\
119  "punpcklbw %%mm7, "#F" \n\t"\
120  "psubw "#E", %%mm6 \n\t"\
121  "psraw $1, "#E" \n\t"\
122  "psubw "#F", %%mm6 \n\t"\
123  "paddw "MANGLE(ADD)", %%mm6 \n\t"\
124  "psraw $7, %%mm6 \n\t"\
125  "packuswb %%mm6, %%mm6 \n\t"\
126  OP(%%mm6, (%1), A, d) \
127  "add %3, %1 \n\t"
128 
129 
130 #define QPEL_CAVSVNUM(VOP,OP,ADD,MUL1,MUL2)\
131  int w= 2;\
132  src -= 2*srcStride;\
133  \
134  while(w--){\
135  __asm__ volatile(\
136  "pxor %%mm7, %%mm7 \n\t"\
137  "movd (%0), %%mm0 \n\t"\
138  "add %2, %0 \n\t"\
139  "movd (%0), %%mm1 \n\t"\
140  "add %2, %0 \n\t"\
141  "movd (%0), %%mm2 \n\t"\
142  "add %2, %0 \n\t"\
143  "movd (%0), %%mm3 \n\t"\
144  "add %2, %0 \n\t"\
145  "movd (%0), %%mm4 \n\t"\
146  "add %2, %0 \n\t"\
147  "punpcklbw %%mm7, %%mm0 \n\t"\
148  "punpcklbw %%mm7, %%mm1 \n\t"\
149  "punpcklbw %%mm7, %%mm2 \n\t"\
150  "punpcklbw %%mm7, %%mm3 \n\t"\
151  "punpcklbw %%mm7, %%mm4 \n\t"\
152  VOP(%%mm0, %%mm1, %%mm2, %%mm3, %%mm4, %%mm5, OP, ADD, MUL1, MUL2)\
153  VOP(%%mm1, %%mm2, %%mm3, %%mm4, %%mm5, %%mm0, OP, ADD, MUL1, MUL2)\
154  VOP(%%mm2, %%mm3, %%mm4, %%mm5, %%mm0, %%mm1, OP, ADD, MUL1, MUL2)\
155  VOP(%%mm3, %%mm4, %%mm5, %%mm0, %%mm1, %%mm2, OP, ADD, MUL1, MUL2)\
156  VOP(%%mm4, %%mm5, %%mm0, %%mm1, %%mm2, %%mm3, OP, ADD, MUL1, MUL2)\
157  VOP(%%mm5, %%mm0, %%mm1, %%mm2, %%mm3, %%mm4, OP, ADD, MUL1, MUL2)\
158  VOP(%%mm0, %%mm1, %%mm2, %%mm3, %%mm4, %%mm5, OP, ADD, MUL1, MUL2)\
159  VOP(%%mm1, %%mm2, %%mm3, %%mm4, %%mm5, %%mm0, OP, ADD, MUL1, MUL2)\
160  \
161  : "+a"(src), "+c"(dst)\
162  : "S"((x86_reg)srcStride), "r"((x86_reg)dstStride)\
163  NAMED_CONSTRAINTS_ADD(ADD,MUL1,MUL2)\
164  : "memory"\
165  );\
166  if(h==16){\
167  __asm__ volatile(\
168  VOP(%%mm2, %%mm3, %%mm4, %%mm5, %%mm0, %%mm1, OP, ADD, MUL1, MUL2)\
169  VOP(%%mm3, %%mm4, %%mm5, %%mm0, %%mm1, %%mm2, OP, ADD, MUL1, MUL2)\
170  VOP(%%mm4, %%mm5, %%mm0, %%mm1, %%mm2, %%mm3, OP, ADD, MUL1, MUL2)\
171  VOP(%%mm5, %%mm0, %%mm1, %%mm2, %%mm3, %%mm4, OP, ADD, MUL1, MUL2)\
172  VOP(%%mm0, %%mm1, %%mm2, %%mm3, %%mm4, %%mm5, OP, ADD, MUL1, MUL2)\
173  VOP(%%mm1, %%mm2, %%mm3, %%mm4, %%mm5, %%mm0, OP, ADD, MUL1, MUL2)\
174  VOP(%%mm2, %%mm3, %%mm4, %%mm5, %%mm0, %%mm1, OP, ADD, MUL1, MUL2)\
175  VOP(%%mm3, %%mm4, %%mm5, %%mm0, %%mm1, %%mm2, OP, ADD, MUL1, MUL2)\
176  \
177  : "+a"(src), "+c"(dst)\
178  : "S"((x86_reg)srcStride), "r"((x86_reg)dstStride)\
179  NAMED_CONSTRAINTS_ADD(ADD,MUL1,MUL2)\
180  : "memory"\
181  );\
182  }\
183  src += 4-(h+5)*srcStride;\
184  dst += 4-h*dstStride;\
185  }
186 
187 #define QPEL_CAVS(OPNAME, OP, MMX)\
188 static void OPNAME ## cavs_qpel8_h_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride)\
189 {\
190  int h=8;\
191  __asm__ volatile(\
192  "pxor %%mm7, %%mm7 \n\t"\
193  "movq "MANGLE(ff_pw_5)", %%mm6\n\t"\
194  "1: \n\t"\
195  "movq (%0), %%mm0 \n\t"\
196  "movq 1(%0), %%mm2 \n\t"\
197  "movq %%mm0, %%mm1 \n\t"\
198  "movq %%mm2, %%mm3 \n\t"\
199  "punpcklbw %%mm7, %%mm0 \n\t"\
200  "punpckhbw %%mm7, %%mm1 \n\t"\
201  "punpcklbw %%mm7, %%mm2 \n\t"\
202  "punpckhbw %%mm7, %%mm3 \n\t"\
203  "paddw %%mm2, %%mm0 \n\t"\
204  "paddw %%mm3, %%mm1 \n\t"\
205  "pmullw %%mm6, %%mm0 \n\t"\
206  "pmullw %%mm6, %%mm1 \n\t"\
207  "movq -1(%0), %%mm2 \n\t"\
208  "movq 2(%0), %%mm4 \n\t"\
209  "movq %%mm2, %%mm3 \n\t"\
210  "movq %%mm4, %%mm5 \n\t"\
211  "punpcklbw %%mm7, %%mm2 \n\t"\
212  "punpckhbw %%mm7, %%mm3 \n\t"\
213  "punpcklbw %%mm7, %%mm4 \n\t"\
214  "punpckhbw %%mm7, %%mm5 \n\t"\
215  "paddw %%mm4, %%mm2 \n\t"\
216  "paddw %%mm3, %%mm5 \n\t"\
217  "psubw %%mm2, %%mm0 \n\t"\
218  "psubw %%mm5, %%mm1 \n\t"\
219  "movq "MANGLE(ff_pw_4)", %%mm5\n\t"\
220  "paddw %%mm5, %%mm0 \n\t"\
221  "paddw %%mm5, %%mm1 \n\t"\
222  "psraw $3, %%mm0 \n\t"\
223  "psraw $3, %%mm1 \n\t"\
224  "packuswb %%mm1, %%mm0 \n\t"\
225  OP(%%mm0, (%1),%%mm5, q) \
226  "add %3, %0 \n\t"\
227  "add %4, %1 \n\t"\
228  "decl %2 \n\t"\
229  " jnz 1b \n\t"\
230  : "+a"(src), "+c"(dst), "+m"(h)\
231  : "d"((x86_reg)srcStride), "S"((x86_reg)dstStride)\
232  NAMED_CONSTRAINTS_ADD(ff_pw_4,ff_pw_5)\
233  : "memory"\
234  );\
235 }\
236 \
237 static inline void OPNAME ## cavs_qpel8or16_v1_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride, int h)\
238 { \
239  QPEL_CAVSVNUM(QPEL_CAVSV1,OP,ff_pw_64,pw_96,pw_42) \
240 }\
241 \
242 static inline void OPNAME ## cavs_qpel8or16_v2_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride, int h)\
243 { \
244  QPEL_CAVSVNUM(QPEL_CAVSV2,OP,ff_pw_4,ff_pw_5,pw_42) \
245 }\
246 \
247 static inline void OPNAME ## cavs_qpel8or16_v3_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride, int h)\
248 { \
249  QPEL_CAVSVNUM(QPEL_CAVSV3,OP,ff_pw_64,pw_96,pw_42) \
250 }\
251 \
252 static void OPNAME ## cavs_qpel8_v1_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride)\
253 { \
254  OPNAME ## cavs_qpel8or16_v1_ ## MMX(dst , src , dstStride, srcStride, 8);\
255 }\
256 static void OPNAME ## cavs_qpel16_v1_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride)\
257 { \
258  OPNAME ## cavs_qpel8or16_v1_ ## MMX(dst , src , dstStride, srcStride, 16);\
259  OPNAME ## cavs_qpel8or16_v1_ ## MMX(dst+8, src+8, dstStride, srcStride, 16);\
260 }\
261 \
262 static void OPNAME ## cavs_qpel8_v2_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride)\
263 { \
264  OPNAME ## cavs_qpel8or16_v2_ ## MMX(dst , src , dstStride, srcStride, 8);\
265 }\
266 static void OPNAME ## cavs_qpel16_v2_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride)\
267 { \
268  OPNAME ## cavs_qpel8or16_v2_ ## MMX(dst , src , dstStride, srcStride, 16);\
269  OPNAME ## cavs_qpel8or16_v2_ ## MMX(dst+8, src+8, dstStride, srcStride, 16);\
270 }\
271 \
272 static void OPNAME ## cavs_qpel8_v3_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride)\
273 { \
274  OPNAME ## cavs_qpel8or16_v3_ ## MMX(dst , src , dstStride, srcStride, 8);\
275 }\
276 static void OPNAME ## cavs_qpel16_v3_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride)\
277 { \
278  OPNAME ## cavs_qpel8or16_v3_ ## MMX(dst , src , dstStride, srcStride, 16);\
279  OPNAME ## cavs_qpel8or16_v3_ ## MMX(dst+8, src+8, dstStride, srcStride, 16);\
280 }\
281 \
282 static void OPNAME ## cavs_qpel16_h_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t dstStride, ptrdiff_t srcStride)\
283 { \
284  OPNAME ## cavs_qpel8_h_ ## MMX(dst , src , dstStride, srcStride);\
285  OPNAME ## cavs_qpel8_h_ ## MMX(dst+8, src+8, dstStride, srcStride);\
286  src += 8*srcStride;\
287  dst += 8*dstStride;\
288  OPNAME ## cavs_qpel8_h_ ## MMX(dst , src , dstStride, srcStride);\
289  OPNAME ## cavs_qpel8_h_ ## MMX(dst+8, src+8, dstStride, srcStride);\
290 }\
291 
292 #define CAVS_MC(OPNAME, SIZE, MMX) \
293 static void OPNAME ## cavs_qpel ## SIZE ## _mc20_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)\
294 {\
295  OPNAME ## cavs_qpel ## SIZE ## _h_ ## MMX(dst, src, stride, stride);\
296 }\
297 \
298 static void OPNAME ## cavs_qpel ## SIZE ## _mc01_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)\
299 {\
300  OPNAME ## cavs_qpel ## SIZE ## _v1_ ## MMX(dst, src, stride, stride);\
301 }\
302 \
303 static void OPNAME ## cavs_qpel ## SIZE ## _mc02_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)\
304 {\
305  OPNAME ## cavs_qpel ## SIZE ## _v2_ ## MMX(dst, src, stride, stride);\
306 }\
307 \
308 static void OPNAME ## cavs_qpel ## SIZE ## _mc03_ ## MMX(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)\
309 {\
310  OPNAME ## cavs_qpel ## SIZE ## _v3_ ## MMX(dst, src, stride, stride);\
311 }\
312 
313 #define PUT_OP(a,b,temp, size) "mov" #size " " #a ", " #b " \n\t"
314 #define AVG_MMXEXT_OP(a, b, temp, size) \
315 "mov" #size " " #b ", " #temp " \n\t"\
316 "pavgb " #temp ", " #a " \n\t"\
317 "mov" #size " " #a ", " #b " \n\t"
318 
319 #endif /* HAVE_MMXEXT_INLINE */
320 
321 #if HAVE_MMX_EXTERNAL
322 static void put_cavs_qpel8_mc00_mmx(uint8_t *dst, const uint8_t *src,
323  ptrdiff_t stride)
324 {
325  ff_put_pixels8_mmx(dst, src, stride, 8);
326 }
327 
328 static void avg_cavs_qpel8_mc00_mmxext(uint8_t *dst, const uint8_t *src,
329  ptrdiff_t stride)
330 {
331  ff_avg_pixels8_mmxext(dst, src, stride, 8);
332 }
333 
334 static void put_cavs_qpel16_mc00_sse2(uint8_t *dst, const uint8_t *src,
335  ptrdiff_t stride)
336 {
337  ff_put_pixels16_sse2(dst, src, stride, 16);
338 }
339 
340 static void avg_cavs_qpel16_mc00_sse2(uint8_t *dst, const uint8_t *src,
341  ptrdiff_t stride)
342 {
343  ff_avg_pixels16_sse2(dst, src, stride, 16);
344 }
345 #endif
346 
347 static av_cold void cavsdsp_init_mmx(CAVSDSPContext *c)
348 {
349 #if HAVE_MMX_EXTERNAL
350  c->put_cavs_qpel_pixels_tab[1][0] = put_cavs_qpel8_mc00_mmx;
351 #endif /* HAVE_MMX_EXTERNAL */
352 }
353 
354 #define DSPFUNC(PFX, IDX, NUM, EXT) \
355  c->PFX ## _cavs_qpel_pixels_tab[IDX][ 2] = PFX ## _cavs_qpel ## NUM ## _mc20_ ## EXT; \
356  c->PFX ## _cavs_qpel_pixels_tab[IDX][ 4] = PFX ## _cavs_qpel ## NUM ## _mc01_ ## EXT; \
357  c->PFX ## _cavs_qpel_pixels_tab[IDX][ 8] = PFX ## _cavs_qpel ## NUM ## _mc02_ ## EXT; \
358  c->PFX ## _cavs_qpel_pixels_tab[IDX][12] = PFX ## _cavs_qpel ## NUM ## _mc03_ ## EXT; \
359 
360 #if HAVE_MMXEXT_INLINE
361 QPEL_CAVS(put_, PUT_OP, mmxext)
362 QPEL_CAVS(avg_, AVG_MMXEXT_OP, mmxext)
363 
364 CAVS_MC(put_, 8, mmxext)
365 CAVS_MC(put_, 16, mmxext)
366 CAVS_MC(avg_, 8, mmxext)
367 CAVS_MC(avg_, 16, mmxext)
368 #endif /* HAVE_MMXEXT_INLINE */
369 
370 av_cold void ff_cavsdsp_init_x86(CAVSDSPContext *c)
371 {
372  av_unused int cpu_flags = av_get_cpu_flags();
373 
374  if (X86_MMX(cpu_flags))
375  cavsdsp_init_mmx(c);
376 
377 #if HAVE_MMXEXT_INLINE
378  if (INLINE_MMXEXT(cpu_flags)) {
379  DSPFUNC(put, 0, 16, mmxext);
380  DSPFUNC(put, 1, 8, mmxext);
381  DSPFUNC(avg, 0, 16, mmxext);
382  DSPFUNC(avg, 1, 8, mmxext);
383  }
384 #endif
385 #if HAVE_MMX_EXTERNAL
386  if (EXTERNAL_MMXEXT(cpu_flags)) {
387  c->avg_cavs_qpel_pixels_tab[1][0] = avg_cavs_qpel8_mc00_mmxext;
388  }
389 #endif
390 #if HAVE_SSE2_EXTERNAL
391  if (EXTERNAL_SSE2(cpu_flags)) {
392  c->put_cavs_qpel_pixels_tab[0][0] = put_cavs_qpel16_mc00_sse2;
393  c->avg_cavs_qpel_pixels_tab[0][0] = avg_cavs_qpel16_mc00_sse2;
394 
395  c->cavs_idct8_add = cavs_idct8_add_sse2;
396  c->idct_perm = FF_IDCT_PERM_TRANSPOSE;
397  }
398 #endif
399 }
ff_put_pixels8_mmx
void ff_put_pixels8_mmx(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
cpu.h
mem_internal.h
out
FILE * out
Definition: movenc.c:55
av_unused
#define av_unused
Definition: attributes.h:131
DECLARE_ASM_CONST
#define DECLARE_ASM_CONST(n, t, v)
Definition: mem_internal.h:90
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:109
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:56
CAVSDSPContext
Definition: cavsdsp.h:30
av_cold
#define av_cold
Definition: attributes.h:90
ff_cavsdsp_init_x86
av_cold void ff_cavsdsp_init_x86(CAVSDSPContext *c)
Definition: cavsdsp.c:370
LOCAL_ALIGNED
#define LOCAL_ALIGNED(a, t, v,...)
Definition: mem_internal.h:124
ff_avg_pixels8_mmxext
void ff_avg_pixels8_mmxext(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
ff_put_pixels16_sse2
void ff_put_pixels16_sse2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
asm.h
cavsdsp_init_mmx
static av_cold void cavsdsp_init_mmx(CAVSDSPContext *c)
Definition: cavsdsp.c:347
ff_add_pixels_clamped_sse2
void ff_add_pixels_clamped_sse2(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size)
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
constants.h
CAVS_MC
#define CAVS_MC(OPNAME, SIZE)
Definition: cavsdsp.c:438
ff_avg_pixels16_sse2
void ff_avg_pixels16_sse2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
cpu.h
avg
#define avg(a, b, c, d)
Definition: colorspacedsp_template.c:28
b2
static double b2(void *priv, double x, double y)
Definition: vf_xfade.c:2035
attributes.h
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
common.h
idctdsp.h
stride
#define stride
Definition: h264pred_template.c:536
FF_IDCT_PERM_TRANSPOSE
@ FF_IDCT_PERM_TRANSPOSE
Definition: idctdsp.h:31
DSPFUNC
#define DSPFUNC(PFX, IDX, NUM, EXT)
Definition: cavsdsp.c:354
fpel.h
INLINE_MMXEXT
#define INLINE_MMXEXT(flags)
Definition: cpu.h:88
X86_MMX
#define X86_MMX(flags)
Definition: cpu.h:30
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
EXTERNAL_MMXEXT
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57
src
#define src
Definition: vp8dsp.c:248
cavsdsp.h
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