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pixblockdsp_alpha.c
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1 /*
2  * SIMD-optimized pixel operations
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/attributes.h"
22 #include "libavcodec/pixblockdsp.h"
23 #include "asm.h"
24 
25 static void get_pixels_mvi(int16_t *restrict block,
26  const uint8_t *restrict pixels, ptrdiff_t stride)
27 {
28  int h = 8;
29 
30  do {
31  uint64_t p;
32 
33  p = ldq(pixels);
34  stq(unpkbw(p), block);
35  stq(unpkbw(p >> 32), block + 4);
36 
37  pixels += stride;
38  block += 8;
39  } while (--h);
40 }
41 
42 static void diff_pixels_mvi(int16_t *block, const uint8_t *s1, const uint8_t *s2,
43  ptrdiff_t stride)
44 {
45  int h = 8;
46  uint64_t mask = 0x4040;
47 
48  mask |= mask << 16;
49  mask |= mask << 32;
50  do {
51  uint64_t x, y, c, d, a;
52  uint64_t signs;
53 
54  x = ldq(s1);
55  y = ldq(s2);
56  c = cmpbge(x, y);
57  d = x - y;
58  a = zap(mask, c); /* We use 0x4040404040404040 here... */
59  d += 4 * a; /* ...so we can use s4addq here. */
60  signs = zap(-1, c);
61 
62  stq(unpkbw(d) | (unpkbw(signs) << 8), block);
63  stq(unpkbw(d >> 32) | (unpkbw(signs >> 32) << 8), block + 4);
64 
65  s1 += stride;
66  s2 += stride;
67  block += 8;
68  } while (--h);
69 }
70 
72  unsigned high_bit_depth)
73 {
74  if (amask(AMASK_MVI) == 0) {
75  if (!high_bit_depth)
78  }
79 }
#define ldq(p)
Definition: asm.h:59
#define cmpbge
Definition: asm.h:92
av_cold void ff_pixblockdsp_init_alpha(PixblockDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Macro definitions for various function/variable attributes.
static int16_t block[64]
Definition: dct.c:115
uint8_t
#define av_cold
Definition: attributes.h:82
void(* diff_pixels)(int16_t *av_restrict block, const uint8_t *s1, const uint8_t *s2, ptrdiff_t stride)
Definition: pixblockdsp.h:32
#define AMASK_MVI
Definition: asm.h:40
#define s2
Definition: regdef.h:39
#define amask
Definition: asm.h:99
static const uint16_t mask[17]
Definition: lzw.c:38
void(* get_pixels)(int16_t *av_restrict block, const uint8_t *pixels, ptrdiff_t stride)
Definition: pixblockdsp.h:29
static void get_pixels_mvi(int16_t *restrict block, const uint8_t *restrict pixels, ptrdiff_t stride)
static void diff_pixels_mvi(int16_t *block, const uint8_t *s1, const uint8_t *s2, ptrdiff_t stride)
main external API structure.
Definition: avcodec.h:1502
#define zap
Definition: asm.h:97
#define s1
Definition: regdef.h:38
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
static double c[64]
#define unpkbw(a)
Definition: asm.h:146
#define stq(l, p)
Definition: asm.h:69
int pixels
Definition: avisynth_c.h:429
#define stride