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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 <stdint.h>
20 
21 #include "config.h"
22 #include "libavutil/attributes.h"
23 #include "libavutil/intreadwrite.h"
24 #include "avcodec.h"
25 #include "pixblockdsp.h"
26 
get_pixels_16_c(int16_t * av_restrict block,const uint8_t * pixels,ptrdiff_t stride)27 static void get_pixels_16_c(int16_t *av_restrict block, const uint8_t *pixels,
28                             ptrdiff_t stride)
29 {
30     AV_COPY128U(block + 0 * 8, pixels + 0 * stride);
31     AV_COPY128U(block + 1 * 8, pixels + 1 * stride);
32     AV_COPY128U(block + 2 * 8, pixels + 2 * stride);
33     AV_COPY128U(block + 3 * 8, pixels + 3 * stride);
34     AV_COPY128U(block + 4 * 8, pixels + 4 * stride);
35     AV_COPY128U(block + 5 * 8, pixels + 5 * stride);
36     AV_COPY128U(block + 6 * 8, pixels + 6 * stride);
37     AV_COPY128U(block + 7 * 8, pixels + 7 * stride);
38 }
39 
get_pixels_8_c(int16_t * av_restrict block,const uint8_t * pixels,ptrdiff_t stride)40 static void get_pixels_8_c(int16_t *av_restrict block, const uint8_t *pixels,
41                            ptrdiff_t stride)
42 {
43     int i;
44 
45     /* read the pixels */
46     for (i = 0; i < 8; i++) {
47         block[0] = pixels[0];
48         block[1] = pixels[1];
49         block[2] = pixels[2];
50         block[3] = pixels[3];
51         block[4] = pixels[4];
52         block[5] = pixels[5];
53         block[6] = pixels[6];
54         block[7] = pixels[7];
55         pixels  += stride;
56         block   += 8;
57     }
58 }
59 
diff_pixels_c(int16_t * av_restrict block,const uint8_t * s1,const uint8_t * s2,ptrdiff_t stride)60 static void diff_pixels_c(int16_t *av_restrict block, const uint8_t *s1,
61                           const uint8_t *s2, ptrdiff_t stride)
62 {
63     int i;
64 
65     /* read the pixels */
66     for (i = 0; i < 8; i++) {
67         block[0] = s1[0] - s2[0];
68         block[1] = s1[1] - s2[1];
69         block[2] = s1[2] - s2[2];
70         block[3] = s1[3] - s2[3];
71         block[4] = s1[4] - s2[4];
72         block[5] = s1[5] - s2[5];
73         block[6] = s1[6] - s2[6];
74         block[7] = s1[7] - s2[7];
75         s1      += stride;
76         s2      += stride;
77         block   += 8;
78     }
79 }
80 
ff_pixblockdsp_init(PixblockDSPContext * c,AVCodecContext * avctx)81 av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
82 {
83     av_unused const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
84 
85     c->diff_pixels_unaligned =
86     c->diff_pixels = diff_pixels_c;
87 
88     switch (avctx->bits_per_raw_sample) {
89     case 9:
90     case 10:
91     case 12:
92     case 14:
93         c->get_pixels_unaligned =
94         c->get_pixels = get_pixels_16_c;
95         break;
96     default:
97         if (avctx->bits_per_raw_sample<=8 || avctx->codec_type != AVMEDIA_TYPE_VIDEO) {
98             c->get_pixels_unaligned =
99             c->get_pixels = get_pixels_8_c;
100         }
101         break;
102     }
103 
104 #if ARCH_AARCH64
105     ff_pixblockdsp_init_aarch64(c, avctx, high_bit_depth);
106 #elif ARCH_ALPHA
107     ff_pixblockdsp_init_alpha(c, avctx, high_bit_depth);
108 #elif ARCH_ARM
109     ff_pixblockdsp_init_arm(c, avctx, high_bit_depth);
110 #elif ARCH_PPC
111     ff_pixblockdsp_init_ppc(c, avctx, high_bit_depth);
112 #elif ARCH_X86
113     ff_pixblockdsp_init_x86(c, avctx, high_bit_depth);
114 #elif ARCH_MIPS
115     ff_pixblockdsp_init_mips(c, avctx, high_bit_depth);
116 #endif
117 }
118