FFmpeg
videodsp_init.c
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2002-2012 Michael Niedermayer
3  * Copyright (C) 2012 Ronald S. Bultje
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "config.h"
23 #include "libavutil/attributes.h"
24 #include "libavutil/avassert.h"
25 #include "libavutil/common.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/mem.h"
28 #include "libavutil/x86/asm.h"
29 #include "libavutil/x86/cpu.h"
30 #include "libavcodec/videodsp.h"
31 
32 #if HAVE_X86ASM
33 typedef void emu_edge_vfix_func(uint8_t *dst, x86_reg dst_stride,
34  const uint8_t *src, x86_reg src_stride,
35  x86_reg start_y, x86_reg end_y, x86_reg bh);
36 typedef void emu_edge_vvar_func(uint8_t *dst, x86_reg dst_stride,
37  const uint8_t *src, x86_reg src_stride,
38  x86_reg start_y, x86_reg end_y, x86_reg bh,
39  x86_reg w);
40 
41 extern emu_edge_vfix_func ff_emu_edge_vfix1_mmx;
42 extern emu_edge_vfix_func ff_emu_edge_vfix2_mmx;
43 extern emu_edge_vfix_func ff_emu_edge_vfix3_mmx;
44 extern emu_edge_vfix_func ff_emu_edge_vfix4_mmx;
45 extern emu_edge_vfix_func ff_emu_edge_vfix5_mmx;
46 extern emu_edge_vfix_func ff_emu_edge_vfix6_mmx;
47 extern emu_edge_vfix_func ff_emu_edge_vfix7_mmx;
48 extern emu_edge_vfix_func ff_emu_edge_vfix8_mmx;
49 extern emu_edge_vfix_func ff_emu_edge_vfix9_mmx;
50 extern emu_edge_vfix_func ff_emu_edge_vfix10_mmx;
51 extern emu_edge_vfix_func ff_emu_edge_vfix11_mmx;
52 extern emu_edge_vfix_func ff_emu_edge_vfix12_mmx;
53 extern emu_edge_vfix_func ff_emu_edge_vfix13_mmx;
54 extern emu_edge_vfix_func ff_emu_edge_vfix14_mmx;
55 extern emu_edge_vfix_func ff_emu_edge_vfix15_mmx;
56 extern emu_edge_vfix_func ff_emu_edge_vfix16_mmx;
57 extern emu_edge_vfix_func ff_emu_edge_vfix17_mmx;
58 extern emu_edge_vfix_func ff_emu_edge_vfix18_mmx;
59 extern emu_edge_vfix_func ff_emu_edge_vfix19_mmx;
60 extern emu_edge_vfix_func ff_emu_edge_vfix20_mmx;
61 extern emu_edge_vfix_func ff_emu_edge_vfix21_mmx;
62 extern emu_edge_vfix_func ff_emu_edge_vfix22_mmx;
63 #if ARCH_X86_32
64 static emu_edge_vfix_func * const vfixtbl_mmx[22] = {
65  &ff_emu_edge_vfix1_mmx, &ff_emu_edge_vfix2_mmx, &ff_emu_edge_vfix3_mmx,
66  &ff_emu_edge_vfix4_mmx, &ff_emu_edge_vfix5_mmx, &ff_emu_edge_vfix6_mmx,
67  &ff_emu_edge_vfix7_mmx, &ff_emu_edge_vfix8_mmx, &ff_emu_edge_vfix9_mmx,
68  &ff_emu_edge_vfix10_mmx, &ff_emu_edge_vfix11_mmx, &ff_emu_edge_vfix12_mmx,
69  &ff_emu_edge_vfix13_mmx, &ff_emu_edge_vfix14_mmx, &ff_emu_edge_vfix15_mmx,
70  &ff_emu_edge_vfix16_mmx, &ff_emu_edge_vfix17_mmx, &ff_emu_edge_vfix18_mmx,
71  &ff_emu_edge_vfix19_mmx, &ff_emu_edge_vfix20_mmx, &ff_emu_edge_vfix21_mmx,
72  &ff_emu_edge_vfix22_mmx
73 };
74 #endif
75 extern emu_edge_vvar_func ff_emu_edge_vvar_mmx;
76 extern emu_edge_vfix_func ff_emu_edge_vfix16_sse;
77 extern emu_edge_vfix_func ff_emu_edge_vfix17_sse;
78 extern emu_edge_vfix_func ff_emu_edge_vfix18_sse;
79 extern emu_edge_vfix_func ff_emu_edge_vfix19_sse;
80 extern emu_edge_vfix_func ff_emu_edge_vfix20_sse;
81 extern emu_edge_vfix_func ff_emu_edge_vfix21_sse;
82 extern emu_edge_vfix_func ff_emu_edge_vfix22_sse;
83 static emu_edge_vfix_func * const vfixtbl_sse[22] = {
84  ff_emu_edge_vfix1_mmx, ff_emu_edge_vfix2_mmx, ff_emu_edge_vfix3_mmx,
85  ff_emu_edge_vfix4_mmx, ff_emu_edge_vfix5_mmx, ff_emu_edge_vfix6_mmx,
86  ff_emu_edge_vfix7_mmx, ff_emu_edge_vfix8_mmx, ff_emu_edge_vfix9_mmx,
87  ff_emu_edge_vfix10_mmx, ff_emu_edge_vfix11_mmx, ff_emu_edge_vfix12_mmx,
88  ff_emu_edge_vfix13_mmx, ff_emu_edge_vfix14_mmx, ff_emu_edge_vfix15_mmx,
89  ff_emu_edge_vfix16_sse, ff_emu_edge_vfix17_sse, ff_emu_edge_vfix18_sse,
90  ff_emu_edge_vfix19_sse, ff_emu_edge_vfix20_sse, ff_emu_edge_vfix21_sse,
91  ff_emu_edge_vfix22_sse
92 };
93 extern emu_edge_vvar_func ff_emu_edge_vvar_sse;
94 
95 typedef void emu_edge_hfix_func(uint8_t *dst, x86_reg dst_stride,
96  x86_reg start_x, x86_reg bh);
97 typedef void emu_edge_hvar_func(uint8_t *dst, x86_reg dst_stride,
98  x86_reg start_x, x86_reg n_words, x86_reg bh);
99 
100 extern emu_edge_hfix_func ff_emu_edge_hfix2_mmx;
101 extern emu_edge_hfix_func ff_emu_edge_hfix4_mmx;
102 extern emu_edge_hfix_func ff_emu_edge_hfix6_mmx;
103 extern emu_edge_hfix_func ff_emu_edge_hfix8_mmx;
104 extern emu_edge_hfix_func ff_emu_edge_hfix10_mmx;
105 extern emu_edge_hfix_func ff_emu_edge_hfix12_mmx;
106 extern emu_edge_hfix_func ff_emu_edge_hfix14_mmx;
107 extern emu_edge_hfix_func ff_emu_edge_hfix16_mmx;
108 extern emu_edge_hfix_func ff_emu_edge_hfix18_mmx;
109 extern emu_edge_hfix_func ff_emu_edge_hfix20_mmx;
110 extern emu_edge_hfix_func ff_emu_edge_hfix22_mmx;
111 #if ARCH_X86_32
112 static emu_edge_hfix_func * const hfixtbl_mmx[11] = {
113  ff_emu_edge_hfix2_mmx, ff_emu_edge_hfix4_mmx, ff_emu_edge_hfix6_mmx,
114  ff_emu_edge_hfix8_mmx, ff_emu_edge_hfix10_mmx, ff_emu_edge_hfix12_mmx,
115  ff_emu_edge_hfix14_mmx, ff_emu_edge_hfix16_mmx, ff_emu_edge_hfix18_mmx,
116  ff_emu_edge_hfix20_mmx, ff_emu_edge_hfix22_mmx
117 };
118 #endif
119 extern emu_edge_hvar_func ff_emu_edge_hvar_mmx;
120 extern emu_edge_hfix_func ff_emu_edge_hfix16_sse2;
121 extern emu_edge_hfix_func ff_emu_edge_hfix18_sse2;
122 extern emu_edge_hfix_func ff_emu_edge_hfix20_sse2;
123 extern emu_edge_hfix_func ff_emu_edge_hfix22_sse2;
124 static emu_edge_hfix_func * const hfixtbl_sse2[11] = {
125  ff_emu_edge_hfix2_mmx, ff_emu_edge_hfix4_mmx, ff_emu_edge_hfix6_mmx,
126  ff_emu_edge_hfix8_mmx, ff_emu_edge_hfix10_mmx, ff_emu_edge_hfix12_mmx,
127  ff_emu_edge_hfix14_mmx, ff_emu_edge_hfix16_sse2, ff_emu_edge_hfix18_sse2,
128  ff_emu_edge_hfix20_sse2, ff_emu_edge_hfix22_sse2
129 };
130 extern emu_edge_hvar_func ff_emu_edge_hvar_sse2;
131 #if HAVE_AVX2_EXTERNAL
132 extern emu_edge_hfix_func ff_emu_edge_hfix8_avx2;
133 extern emu_edge_hfix_func ff_emu_edge_hfix10_avx2;
134 extern emu_edge_hfix_func ff_emu_edge_hfix12_avx2;
135 extern emu_edge_hfix_func ff_emu_edge_hfix14_avx2;
136 extern emu_edge_hfix_func ff_emu_edge_hfix16_avx2;
137 extern emu_edge_hfix_func ff_emu_edge_hfix18_avx2;
138 extern emu_edge_hfix_func ff_emu_edge_hfix20_avx2;
139 extern emu_edge_hfix_func ff_emu_edge_hfix22_avx2;
140 static emu_edge_hfix_func * const hfixtbl_avx2[11] = {
141  ff_emu_edge_hfix2_mmx, ff_emu_edge_hfix4_mmx, ff_emu_edge_hfix6_mmx,
142  ff_emu_edge_hfix8_avx2, ff_emu_edge_hfix10_avx2, ff_emu_edge_hfix12_avx2,
143  ff_emu_edge_hfix14_avx2, ff_emu_edge_hfix16_avx2, ff_emu_edge_hfix18_avx2,
144  ff_emu_edge_hfix20_avx2, ff_emu_edge_hfix22_avx2
145 };
146 extern emu_edge_hvar_func ff_emu_edge_hvar_avx2;
147 #endif
148 
149 static av_always_inline void emulated_edge_mc(uint8_t *dst, const uint8_t *src,
150  ptrdiff_t dst_stride,
151  ptrdiff_t src_stride,
152  x86_reg block_w, x86_reg block_h,
153  x86_reg src_x, x86_reg src_y,
154  x86_reg w, x86_reg h,
155  emu_edge_vfix_func * const *vfix_tbl,
156  emu_edge_vvar_func *v_extend_var,
157  emu_edge_hfix_func * const *hfix_tbl,
158  emu_edge_hvar_func *h_extend_var)
159 {
160  x86_reg start_y, start_x, end_y, end_x, src_y_add = 0, p;
161 
162  if (!w || !h)
163  return;
164 
165  av_assert2(block_w <= FFABS(dst_stride));
166 
167  if (src_y >= h) {
168  src -= src_y*src_stride;
169  src_y_add = h - 1;
170  src_y = h - 1;
171  } else if (src_y <= -block_h) {
172  src -= src_y*src_stride;
173  src_y_add = 1 - block_h;
174  src_y = 1 - block_h;
175  }
176  if (src_x >= w) {
177  src += w - 1 - src_x;
178  src_x = w - 1;
179  } else if (src_x <= -block_w) {
180  src += 1 - block_w - src_x;
181  src_x = 1 - block_w;
182  }
183 
184  start_y = FFMAX(0, -src_y);
185  start_x = FFMAX(0, -src_x);
186  end_y = FFMIN(block_h, h-src_y);
187  end_x = FFMIN(block_w, w-src_x);
188  av_assert2(start_x < end_x && block_w > 0);
189  av_assert2(start_y < end_y && block_h > 0);
190 
191  // fill in the to-be-copied part plus all above/below
192  src += (src_y_add + start_y) * src_stride + start_x;
193  w = end_x - start_x;
194  if (w <= 22) {
195  vfix_tbl[w - 1](dst + start_x, dst_stride, src, src_stride,
196  start_y, end_y, block_h);
197  } else {
198  v_extend_var(dst + start_x, dst_stride, src, src_stride,
199  start_y, end_y, block_h, w);
200  }
201 
202  // fill left
203  if (start_x) {
204  if (start_x <= 22) {
205  hfix_tbl[(start_x - 1) >> 1](dst, dst_stride, start_x, block_h);
206  } else {
207  h_extend_var(dst, dst_stride,
208  start_x, (start_x + 1) >> 1, block_h);
209  }
210  }
211 
212  // fill right
213  p = block_w - end_x;
214  if (p) {
215  if (p <= 22) {
216  hfix_tbl[(p - 1) >> 1](dst + end_x - (p & 1), dst_stride,
217  -!(p & 1), block_h);
218  } else {
219  h_extend_var(dst + end_x - (p & 1), dst_stride,
220  -!(p & 1), (p + 1) >> 1, block_h);
221  }
222  }
223 }
224 
225 #if ARCH_X86_32
226 static av_noinline void emulated_edge_mc_mmx(uint8_t *buf, const uint8_t *src,
227  ptrdiff_t buf_stride,
228  ptrdiff_t src_stride,
229  int block_w, int block_h,
230  int src_x, int src_y, int w, int h)
231 {
232  emulated_edge_mc(buf, src, buf_stride, src_stride, block_w, block_h,
233  src_x, src_y, w, h, vfixtbl_mmx, &ff_emu_edge_vvar_mmx,
234  hfixtbl_mmx, &ff_emu_edge_hvar_mmx);
235 }
236 
237 static av_noinline void emulated_edge_mc_sse(uint8_t *buf, const uint8_t *src,
238  ptrdiff_t buf_stride,
239  ptrdiff_t src_stride,
240  int block_w, int block_h,
241  int src_x, int src_y, int w, int h)
242 {
243  emulated_edge_mc(buf, src, buf_stride, src_stride, block_w, block_h,
244  src_x, src_y, w, h, vfixtbl_sse, &ff_emu_edge_vvar_sse,
245  hfixtbl_mmx, &ff_emu_edge_hvar_mmx);
246 }
247 #endif
248 
249 static av_noinline void emulated_edge_mc_sse2(uint8_t *buf, const uint8_t *src,
250  ptrdiff_t buf_stride,
251  ptrdiff_t src_stride,
252  int block_w, int block_h,
253  int src_x, int src_y, int w,
254  int h)
255 {
256  emulated_edge_mc(buf, src, buf_stride, src_stride, block_w, block_h,
257  src_x, src_y, w, h, vfixtbl_sse, &ff_emu_edge_vvar_sse,
258  hfixtbl_sse2, &ff_emu_edge_hvar_sse2);
259 }
260 
261 #if HAVE_AVX2_EXTERNAL
262 static av_noinline void emulated_edge_mc_avx2(uint8_t *buf, const uint8_t *src,
263  ptrdiff_t buf_stride,
264  ptrdiff_t src_stride,
265  int block_w, int block_h,
266  int src_x, int src_y, int w,
267  int h)
268 {
269  emulated_edge_mc(buf, src, buf_stride, src_stride, block_w, block_h,
270  src_x, src_y, w, h, vfixtbl_sse, &ff_emu_edge_vvar_sse,
271  hfixtbl_avx2, &ff_emu_edge_hvar_avx2);
272 }
273 #endif /* HAVE_AVX2_EXTERNAL */
274 #endif /* HAVE_X86ASM */
275 
276 void ff_prefetch_mmxext(uint8_t *buf, ptrdiff_t stride, int h);
277 void ff_prefetch_3dnow(uint8_t *buf, ptrdiff_t stride, int h);
278 
279 av_cold void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc)
280 {
281 #if HAVE_X86ASM
282  int cpu_flags = av_get_cpu_flags();
283 
284 #if ARCH_X86_32
285  if (EXTERNAL_MMX(cpu_flags) && bpc <= 8) {
286  ctx->emulated_edge_mc = emulated_edge_mc_mmx;
287  }
288  if (EXTERNAL_AMD3DNOW(cpu_flags)) {
289  ctx->prefetch = ff_prefetch_3dnow;
290  }
291 #endif /* ARCH_X86_32 */
292  if (EXTERNAL_MMXEXT(cpu_flags)) {
293  ctx->prefetch = ff_prefetch_mmxext;
294  }
295 #if ARCH_X86_32
296  if (EXTERNAL_SSE(cpu_flags) && bpc <= 8) {
297  ctx->emulated_edge_mc = emulated_edge_mc_sse;
298  }
299 #endif /* ARCH_X86_32 */
300  if (EXTERNAL_SSE2(cpu_flags) && bpc <= 8) {
301  ctx->emulated_edge_mc = emulated_edge_mc_sse2;
302  }
303 #if HAVE_AVX2_EXTERNAL
304  if (EXTERNAL_AVX2(cpu_flags) && bpc <= 8) {
305  ctx->emulated_edge_mc = emulated_edge_mc_avx2;
306  }
307 #endif
308 #endif /* HAVE_X86ASM */
309 }
stride
int stride
Definition: mace.c:144
cpu.h
w
uint8_t w
Definition: llviddspenc.c:39
EXTERNAL_AMD3DNOW
#define EXTERNAL_AMD3DNOW(flags)
Definition: cpu.h:54
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:50
av_noinline
#define av_noinline
Definition: attributes.h:72
EXTERNAL_AVX2
#define EXTERNAL_AVX2(flags)
Definition: cpu.h:78
avassert.h
av_cold
#define av_cold
Definition: attributes.h:90
EXTERNAL_SSE
#define EXTERNAL_SSE(flags)
Definition: cpu.h:58
ctx
AVFormatContext * ctx
Definition: movenc.c:48
ff_videodsp_init_x86
av_cold void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc)
Definition: videodsp_init.c:279
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
ff_prefetch_3dnow
void ff_prefetch_3dnow(uint8_t *buf, ptrdiff_t stride, int h)
src
#define src
Definition: vp8dsp.c:255
cpu.h
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
asm.h
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
attributes.h
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
common.h
av_always_inline
#define av_always_inline
Definition: attributes.h:49
uint8_t
uint8_t
Definition: audio_convert.c:194
VideoDSPContext
Definition: videodsp.h:41
mem.h
videodsp.h
x86_reg
int x86_reg
Definition: asm.h:72
h
h
Definition: vp9dsp_template.c:2038
EXTERNAL_MMX
#define EXTERNAL_MMX(flags)
Definition: cpu.h:56
ff_prefetch_mmxext
void ff_prefetch_mmxext(uint8_t *buf, ptrdiff_t stride, int h)
EXTERNAL_MMXEXT
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57
Generated on Wed Aug 24 2022 21:33:45 for FFmpeg by   doxygen 1.8.17