path: root/libavcodec/pixblockdsp.c (plain)
blob: 417c944e00bb0904bd1fd9669c64afac47c558c2

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
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
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
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
81	av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
82	{
83	const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
84
85	c->diff_pixels = diff_pixels_c;
86
87	switch (avctx->bits_per_raw_sample) {
88	case 9:
89	case 10:
90	case 12:
91	case 14:
92	c->get_pixels = get_pixels_16_c;
93	break;
94	default:
95	if (avctx->bits_per_raw_sample<=8 || avctx->codec_type != AVMEDIA_TYPE_VIDEO) {
96	c->get_pixels = get_pixels_8_c;
97	}
98	break;
99	}
100
101	if (ARCH_ALPHA)
102	ff_pixblockdsp_init_alpha(c, avctx, high_bit_depth);
103	if (ARCH_ARM)
104	ff_pixblockdsp_init_arm(c, avctx, high_bit_depth);
105	if (ARCH_PPC)
106	ff_pixblockdsp_init_ppc(c, avctx, high_bit_depth);
107	if (ARCH_X86)
108	ff_pixblockdsp_init_x86(c, avctx, high_bit_depth);
109	if (ARCH_MIPS)
110	ff_pixblockdsp_init_mips(c, avctx, high_bit_depth);
111	}
112