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
32typedef 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);
35typedef 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
40extern emu_edge_vfix_func ff_emu_edge_vfix1_mmx;
41extern emu_edge_vfix_func ff_emu_edge_vfix2_mmx;
42extern emu_edge_vfix_func ff_emu_edge_vfix3_mmx;
43extern emu_edge_vfix_func ff_emu_edge_vfix4_mmx;
44extern emu_edge_vfix_func ff_emu_edge_vfix5_mmx;
45extern emu_edge_vfix_func ff_emu_edge_vfix6_mmx;
46extern emu_edge_vfix_func ff_emu_edge_vfix7_mmx;
47extern emu_edge_vfix_func ff_emu_edge_vfix8_mmx;
48extern emu_edge_vfix_func ff_emu_edge_vfix9_mmx;
49extern emu_edge_vfix_func ff_emu_edge_vfix10_mmx;
50extern emu_edge_vfix_func ff_emu_edge_vfix11_mmx;
51extern emu_edge_vfix_func ff_emu_edge_vfix12_mmx;
52extern emu_edge_vfix_func ff_emu_edge_vfix13_mmx;
53extern emu_edge_vfix_func ff_emu_edge_vfix14_mmx;
54extern emu_edge_vfix_func ff_emu_edge_vfix15_mmx;
55extern emu_edge_vfix_func ff_emu_edge_vfix16_sse;
56extern emu_edge_vfix_func ff_emu_edge_vfix17_sse;
57extern emu_edge_vfix_func ff_emu_edge_vfix18_sse;
58extern emu_edge_vfix_func ff_emu_edge_vfix19_sse;
59extern emu_edge_vfix_func ff_emu_edge_vfix20_sse;
60extern emu_edge_vfix_func ff_emu_edge_vfix21_sse;
61extern emu_edge_vfix_func ff_emu_edge_vfix22_sse;
62static 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};
72extern emu_edge_vvar_func ff_emu_edge_vvar_sse;
73
74typedef void emu_edge_hfix_func(uint8_t *dst, x86_reg dst_stride,
75                                x86_reg start_x, x86_reg bh);
76typedef 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
79extern emu_edge_hfix_func ff_emu_edge_hfix2_mmx;
80extern emu_edge_hfix_func ff_emu_edge_hfix4_mmx;
81extern emu_edge_hfix_func ff_emu_edge_hfix6_mmx;
82extern emu_edge_hfix_func ff_emu_edge_hfix8_mmx;
83extern emu_edge_hfix_func ff_emu_edge_hfix10_mmx;
84extern emu_edge_hfix_func ff_emu_edge_hfix12_mmx;
85extern emu_edge_hfix_func ff_emu_edge_hfix14_mmx;
86extern emu_edge_hfix_func ff_emu_edge_hfix16_sse2;
87extern emu_edge_hfix_func ff_emu_edge_hfix18_sse2;
88extern emu_edge_hfix_func ff_emu_edge_hfix20_sse2;
89extern emu_edge_hfix_func ff_emu_edge_hfix22_sse2;
90static 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};
96extern emu_edge_hvar_func ff_emu_edge_hvar_sse2;
97#if HAVE_AVX2_EXTERNAL
98extern emu_edge_hfix_func ff_emu_edge_hfix8_avx2;
99extern emu_edge_hfix_func ff_emu_edge_hfix10_avx2;
100extern emu_edge_hfix_func ff_emu_edge_hfix12_avx2;
101extern emu_edge_hfix_func ff_emu_edge_hfix14_avx2;
102extern emu_edge_hfix_func ff_emu_edge_hfix16_avx2;
103extern emu_edge_hfix_func ff_emu_edge_hfix18_avx2;
104extern emu_edge_hfix_func ff_emu_edge_hfix20_avx2;
105extern emu_edge_hfix_func ff_emu_edge_hfix22_avx2;
106static 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};
112extern emu_edge_hvar_func ff_emu_edge_hvar_avx2;
113#endif
114
115static 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
191static 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
204static 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
218void ff_prefetch_mmxext(uint8_t *buf, ptrdiff_t stride, int h);
219
220av_cold void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc)
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}
238