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mpegvideodsp.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "config.h"
20 #include "libavutil/attributes.h"
21 #include "libavutil/common.h"
22 #include "mpegvideodsp.h"
23 
24 static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h,
25  int x16, int y16, int rounder)
26 {
27  const int A = (16 - x16) * (16 - y16);
28  const int B = (x16) * (16 - y16);
29  const int C = (16 - x16) * (y16);
30  const int D = (x16) * (y16);
31  int i;
32 
33  for (i = 0; i < h; i++) {
34  dst[0] = (A * src[0] + B * src[1] + C * src[stride + 0] + D * src[stride + 1] + rounder) >> 8;
35  dst[1] = (A * src[1] + B * src[2] + C * src[stride + 1] + D * src[stride + 2] + rounder) >> 8;
36  dst[2] = (A * src[2] + B * src[3] + C * src[stride + 2] + D * src[stride + 3] + rounder) >> 8;
37  dst[3] = (A * src[3] + B * src[4] + C * src[stride + 3] + D * src[stride + 4] + rounder) >> 8;
38  dst[4] = (A * src[4] + B * src[5] + C * src[stride + 4] + D * src[stride + 5] + rounder) >> 8;
39  dst[5] = (A * src[5] + B * src[6] + C * src[stride + 5] + D * src[stride + 6] + rounder) >> 8;
40  dst[6] = (A * src[6] + B * src[7] + C * src[stride + 6] + D * src[stride + 7] + rounder) >> 8;
41  dst[7] = (A * src[7] + B * src[8] + C * src[stride + 7] + D * src[stride + 8] + rounder) >> 8;
42  dst += stride;
43  src += stride;
44  }
45 }
46 
47 void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy,
48  int dxx, int dxy, int dyx, int dyy, int shift, int r,
49  int width, int height)
50 {
51  int y, vx, vy;
52  const int s = 1 << shift;
53 
54  width--;
55  height--;
56 
57  for (y = 0; y < h; y++) {
58  int x;
59 
60  vx = ox;
61  vy = oy;
62  for (x = 0; x < 8; x++) { // FIXME: optimize
63  int index;
64  int src_x = vx >> 16;
65  int src_y = vy >> 16;
66  int frac_x = src_x & (s - 1);
67  int frac_y = src_y & (s - 1);
68 
69  src_x >>= shift;
70  src_y >>= shift;
71 
72  if ((unsigned) src_x < width) {
73  if ((unsigned) src_y < height) {
74  index = src_x + src_y * stride;
75  dst[y * stride + x] =
76  ((src[index] * (s - frac_x) +
77  src[index + 1] * frac_x) * (s - frac_y) +
78  (src[index + stride] * (s - frac_x) +
79  src[index + stride + 1] * frac_x) * frac_y +
80  r) >> (shift * 2);
81  } else {
82  index = src_x + av_clip(src_y, 0, height) * stride;
83  dst[y * stride + x] =
84  ((src[index] * (s - frac_x) +
85  src[index + 1] * frac_x) * s +
86  r) >> (shift * 2);
87  }
88  } else {
89  if ((unsigned) src_y < height) {
90  index = av_clip(src_x, 0, width) + src_y * stride;
91  dst[y * stride + x] =
92  ((src[index] * (s - frac_y) +
93  src[index + stride] * frac_y) * s +
94  r) >> (shift * 2);
95  } else {
96  index = av_clip(src_x, 0, width) +
97  av_clip(src_y, 0, height) * stride;
98  dst[y * stride + x] = src[index];
99  }
100  }
101 
102  vx += dxx;
103  vy += dyx;
104  }
105  ox += dxy;
106  oy += dyy;
107  }
108 }
109 
111 {
112  c->gmc1 = gmc1_c;
113  c->gmc = ff_gmc_c;
114 
115  if (ARCH_PPC)
117  if (ARCH_X86)
119 }
av_cold void ff_mpegvideodsp_init(MpegVideoDSPContext *c)
Definition: mpegvideodsp.c:110
static int shift(int a, int b)
Definition: sonic.c:82
#define C
static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h, int x16, int y16, int rounder)
Definition: mpegvideodsp.c:24
#define src
Definition: vp8dsp.c:254
Macro definitions for various function/variable attributes.
uint8_t
#define av_cold
Definition: attributes.h:82
#define height
#define A(x)
Definition: vp56_arith.h:28
void(* gmc)(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy, int dxx, int dxy, int dyx, int dyy, int shift, int r, int width, int height)
global motion compensation.
Definition: mpegvideodsp.h:37
void(* gmc1)(uint8_t *dst, uint8_t *src, int srcStride, int h, int x16, int y16, int rounder)
translational global motion compensation.
Definition: mpegvideodsp.h:32
#define B
Definition: huffyuvdsp.h:32
const char * r
Definition: vf_curves.c:111
uint16_t width
Definition: gdv.c:47
av_cold void ff_mpegvideodsp_init_x86(MpegVideoDSPContext *c)
Definition: mpegvideodsp.c:153
void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy, int dxx, int dxy, int dyx, int dyy, int shift, int r, int width, int height)
Definition: mpegvideodsp.c:47
#define s(width, name)
Definition: cbs_vp9.c:257
int index
Definition: gxfenc.c:89
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
common internal and external API header
D(D(float, sse)
Definition: rematrix_init.c:28
static double c[64]
av_cold void ff_mpegvideodsp_init_ppc(MpegVideoDSPContext *c)
Definition: mpegvideodsp.c:130
#define stride