FFmpeg
videodsp_init.c
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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/x86/asm.h"
28 #include "libavutil/x86/cpu.h"
29 #include "libavcodec/videodsp.h"
30 
31 #if HAVE_X86ASM
32 typedef void emu_edge_vfix_func(uint8_t *dst, x86_reg dst_stride,
33  const uint8_t *src, x86_reg src_stride,
34  x86_reg start_y, x86_reg end_y, x86_reg bh);
35 typedef void emu_edge_vvar_func(uint8_t *dst, x86_reg dst_stride,
36  const uint8_t *src, x86_reg src_stride,
37  x86_reg start_y, x86_reg end_y, x86_reg bh,
38  x86_reg w);
39 
40 extern emu_edge_vfix_func ff_emu_edge_vfix1_mmx;
41 extern emu_edge_vfix_func ff_emu_edge_vfix2_mmx;
42 extern emu_edge_vfix_func ff_emu_edge_vfix3_mmx;
43 extern emu_edge_vfix_func ff_emu_edge_vfix4_mmx;
44 extern emu_edge_vfix_func ff_emu_edge_vfix5_mmx;
45 extern emu_edge_vfix_func ff_emu_edge_vfix6_mmx;
46 extern emu_edge_vfix_func ff_emu_edge_vfix7_mmx;
47 extern emu_edge_vfix_func ff_emu_edge_vfix8_mmx;
48 extern emu_edge_vfix_func ff_emu_edge_vfix9_mmx;
49 extern emu_edge_vfix_func ff_emu_edge_vfix10_mmx;
50 extern emu_edge_vfix_func ff_emu_edge_vfix11_mmx;
51 extern emu_edge_vfix_func ff_emu_edge_vfix12_mmx;
52 extern emu_edge_vfix_func ff_emu_edge_vfix13_mmx;
53 extern emu_edge_vfix_func ff_emu_edge_vfix14_mmx;
54 extern emu_edge_vfix_func ff_emu_edge_vfix15_mmx;
55 extern emu_edge_vfix_func ff_emu_edge_vfix16_sse;
56 extern emu_edge_vfix_func ff_emu_edge_vfix17_sse;
57 extern emu_edge_vfix_func ff_emu_edge_vfix18_sse;
58 extern emu_edge_vfix_func ff_emu_edge_vfix19_sse;
59 extern emu_edge_vfix_func ff_emu_edge_vfix20_sse;
60 extern emu_edge_vfix_func ff_emu_edge_vfix21_sse;
61 extern emu_edge_vfix_func ff_emu_edge_vfix22_sse;
62 static emu_edge_vfix_func * const vfixtbl_sse[22] = {
63  ff_emu_edge_vfix1_mmx, ff_emu_edge_vfix2_mmx, ff_emu_edge_vfix3_mmx,
64  ff_emu_edge_vfix4_mmx, ff_emu_edge_vfix5_mmx, ff_emu_edge_vfix6_mmx,
65  ff_emu_edge_vfix7_mmx, ff_emu_edge_vfix8_mmx, ff_emu_edge_vfix9_mmx,
66  ff_emu_edge_vfix10_mmx, ff_emu_edge_vfix11_mmx, ff_emu_edge_vfix12_mmx,
67  ff_emu_edge_vfix13_mmx, ff_emu_edge_vfix14_mmx, ff_emu_edge_vfix15_mmx,
68  ff_emu_edge_vfix16_sse, ff_emu_edge_vfix17_sse, ff_emu_edge_vfix18_sse,
69  ff_emu_edge_vfix19_sse, ff_emu_edge_vfix20_sse, ff_emu_edge_vfix21_sse,
70  ff_emu_edge_vfix22_sse
71 };
72 extern emu_edge_vvar_func ff_emu_edge_vvar_sse;
73 
74 typedef void emu_edge_hfix_func(uint8_t *dst, x86_reg dst_stride,
75  x86_reg start_x, x86_reg bh);
76 typedef void emu_edge_hvar_func(uint8_t *dst, x86_reg dst_stride,
77  x86_reg start_x, x86_reg n_words, x86_reg bh);
78 
79 extern emu_edge_hfix_func ff_emu_edge_hfix2_mmx;
80 extern emu_edge_hfix_func ff_emu_edge_hfix4_mmx;
81 extern emu_edge_hfix_func ff_emu_edge_hfix6_mmx;
82 extern emu_edge_hfix_func ff_emu_edge_hfix8_mmx;
83 extern emu_edge_hfix_func ff_emu_edge_hfix10_mmx;
84 extern emu_edge_hfix_func ff_emu_edge_hfix12_mmx;
85 extern emu_edge_hfix_func ff_emu_edge_hfix14_mmx;
86 extern emu_edge_hfix_func ff_emu_edge_hfix16_sse2;
87 extern emu_edge_hfix_func ff_emu_edge_hfix18_sse2;
88 extern emu_edge_hfix_func ff_emu_edge_hfix20_sse2;
89 extern emu_edge_hfix_func ff_emu_edge_hfix22_sse2;
90 static emu_edge_hfix_func * const hfixtbl_sse2[11] = {
91  ff_emu_edge_hfix2_mmx, ff_emu_edge_hfix4_mmx, ff_emu_edge_hfix6_mmx,
92  ff_emu_edge_hfix8_mmx, ff_emu_edge_hfix10_mmx, ff_emu_edge_hfix12_mmx,
93  ff_emu_edge_hfix14_mmx, ff_emu_edge_hfix16_sse2, ff_emu_edge_hfix18_sse2,
94  ff_emu_edge_hfix20_sse2, ff_emu_edge_hfix22_sse2
95 };
96 extern emu_edge_hvar_func ff_emu_edge_hvar_sse2;
97 #if HAVE_AVX2_EXTERNAL
98 extern emu_edge_hfix_func ff_emu_edge_hfix8_avx2;
99 extern emu_edge_hfix_func ff_emu_edge_hfix10_avx2;
100 extern emu_edge_hfix_func ff_emu_edge_hfix12_avx2;
101 extern emu_edge_hfix_func ff_emu_edge_hfix14_avx2;
102 extern emu_edge_hfix_func ff_emu_edge_hfix16_avx2;
103 extern emu_edge_hfix_func ff_emu_edge_hfix18_avx2;
104 extern emu_edge_hfix_func ff_emu_edge_hfix20_avx2;
105 extern emu_edge_hfix_func ff_emu_edge_hfix22_avx2;
106 static emu_edge_hfix_func * const hfixtbl_avx2[11] = {
107  ff_emu_edge_hfix2_mmx, ff_emu_edge_hfix4_mmx, ff_emu_edge_hfix6_mmx,
108  ff_emu_edge_hfix8_avx2, ff_emu_edge_hfix10_avx2, ff_emu_edge_hfix12_avx2,
109  ff_emu_edge_hfix14_avx2, ff_emu_edge_hfix16_avx2, ff_emu_edge_hfix18_avx2,
110  ff_emu_edge_hfix20_avx2, ff_emu_edge_hfix22_avx2
111 };
112 extern emu_edge_hvar_func ff_emu_edge_hvar_avx2;
113 #endif
114 
115 static av_always_inline void emulated_edge_mc(uint8_t *dst, const uint8_t *src,
116  ptrdiff_t dst_stride,
117  ptrdiff_t src_stride,
118  x86_reg block_w, x86_reg block_h,
119  x86_reg src_x, x86_reg src_y,
120  x86_reg w, x86_reg h,
121  emu_edge_vfix_func * const *vfix_tbl,
122  emu_edge_vvar_func *v_extend_var,
123  emu_edge_hfix_func * const *hfix_tbl,
124  emu_edge_hvar_func *h_extend_var)
125 {
126  x86_reg start_y, start_x, end_y, end_x, src_y_add = 0, p;
127 
128  if (!w || !h)
129  return;
130 
131  av_assert2(block_w <= FFABS(dst_stride));
132 
133  if (src_y >= h) {
134  src -= src_y*src_stride;
135  src_y_add = h - 1;
136  src_y = h - 1;
137  } else if (src_y <= -block_h) {
138  src -= src_y*src_stride;
139  src_y_add = 1 - block_h;
140  src_y = 1 - block_h;
141  }
142  if (src_x >= w) {
143  src += w - 1 - src_x;
144  src_x = w - 1;
145  } else if (src_x <= -block_w) {
146  src += 1 - block_w - src_x;
147  src_x = 1 - block_w;
148  }
149 
150  start_y = FFMAX(0, -src_y);
151  start_x = FFMAX(0, -src_x);
152  end_y = FFMIN(block_h, h-src_y);
153  end_x = FFMIN(block_w, w-src_x);
154  av_assert2(start_x < end_x && block_w > 0);
155  av_assert2(start_y < end_y && block_h > 0);
156 
157  // fill in the to-be-copied part plus all above/below
158  src += (src_y_add + start_y) * src_stride + start_x;
159  w = end_x - start_x;
160  if (w <= 22) {
161  vfix_tbl[w - 1](dst + start_x, dst_stride, src, src_stride,
162  start_y, end_y, block_h);
163  } else {
164  v_extend_var(dst + start_x, dst_stride, src, src_stride,
165  start_y, end_y, block_h, w);
166  }
167 
168  // fill left
169  if (start_x) {
170  if (start_x <= 22) {
171  hfix_tbl[(start_x - 1) >> 1](dst, dst_stride, start_x, block_h);
172  } else {
173  h_extend_var(dst, dst_stride,
174  start_x, (start_x + 1) >> 1, block_h);
175  }
176  }
177 
178  // fill right
179  p = block_w - end_x;
180  if (p) {
181  if (p <= 22) {
182  hfix_tbl[(p - 1) >> 1](dst + end_x - (p & 1), dst_stride,
183  -!(p & 1), block_h);
184  } else {
185  h_extend_var(dst + end_x - (p & 1), dst_stride,
186  -!(p & 1), (p + 1) >> 1, block_h);
187  }
188  }
189 }
190 
191 static av_noinline void emulated_edge_mc_sse2(uint8_t *buf, const uint8_t *src,
192  ptrdiff_t buf_stride,
193  ptrdiff_t src_stride,
194  int block_w, int block_h,
195  int src_x, int src_y, int w,
196  int h)
197 {
198  emulated_edge_mc(buf, src, buf_stride, src_stride, block_w, block_h,
199  src_x, src_y, w, h, vfixtbl_sse, &ff_emu_edge_vvar_sse,
200  hfixtbl_sse2, &ff_emu_edge_hvar_sse2);
201 }
202 
203 #if HAVE_AVX2_EXTERNAL
204 static av_noinline void emulated_edge_mc_avx2(uint8_t *buf, const uint8_t *src,
205  ptrdiff_t buf_stride,
206  ptrdiff_t src_stride,
207  int block_w, int block_h,
208  int src_x, int src_y, int w,
209  int h)
210 {
211  emulated_edge_mc(buf, src, buf_stride, src_stride, block_w, block_h,
212  src_x, src_y, w, h, vfixtbl_sse, &ff_emu_edge_vvar_sse,
213  hfixtbl_avx2, &ff_emu_edge_hvar_avx2);
214 }
215 #endif /* HAVE_AVX2_EXTERNAL */
216 #endif /* HAVE_X86ASM */
217 
218 void ff_prefetch_mmxext(const uint8_t *buf, ptrdiff_t stride, int h);
219 
221 {
222 #if HAVE_X86ASM
223  int cpu_flags = av_get_cpu_flags();
224 
225  if (EXTERNAL_MMXEXT(cpu_flags)) {
226  ctx->prefetch = ff_prefetch_mmxext;
227  }
228  if (EXTERNAL_SSE2(cpu_flags) && bpc <= 8) {
229  ctx->emulated_edge_mc = emulated_edge_mc_sse2;
230  }
231 #if HAVE_AVX2_EXTERNAL
232  if (EXTERNAL_AVX2(cpu_flags) && bpc <= 8) {
233  ctx->emulated_edge_mc = emulated_edge_mc_avx2;
234  }
235 #endif
236 #endif /* HAVE_X86ASM */
237 }
cpu.h
w
uint8_t w
Definition: llviddspenc.c:38
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:101
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:52
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
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:220
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:64
ff_prefetch_mmxext
void ff_prefetch_mmxext(const uint8_t *buf, ptrdiff_t stride, int h)
cpu.h
asm.h
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
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
stride
#define stride
Definition: h264pred_template.c:537
VideoDSPContext
Definition: videodsp.h:40
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
videodsp.h
x86_reg
int x86_reg
Definition: asm.h:72
h
h
Definition: vp9dsp_template.c:2038
EXTERNAL_MMXEXT
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57