Libav
pixblockdsp.c
Go to the documentation of this file.
1 /*
2  * This file is part of Libav.
3  *
4  * Libav 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  * Libav 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 Libav; 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 "avcodec.h"
24 #include "pixblockdsp.h"
25 
26 #define BIT_DEPTH 16
27 #include "pixblockdsp_template.c"
28 #undef BIT_DEPTH
29 
30 #define BIT_DEPTH 8
31 #include "pixblockdsp_template.c"
32 
33 static void diff_pixels_c(int16_t *restrict block, const uint8_t *s1,
34  const uint8_t *s2, int stride)
35 {
36  int i;
37 
38  /* read the pixels */
39  for (i = 0; i < 8; i++) {
40  block[0] = s1[0] - s2[0];
41  block[1] = s1[1] - s2[1];
42  block[2] = s1[2] - s2[2];
43  block[3] = s1[3] - s2[3];
44  block[4] = s1[4] - s2[4];
45  block[5] = s1[5] - s2[5];
46  block[6] = s1[6] - s2[6];
47  block[7] = s1[7] - s2[7];
48  s1 += stride;
49  s2 += stride;
50  block += 8;
51  }
52 }
53 
55 {
56  const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
57 
59 
60  switch (avctx->bits_per_raw_sample) {
61  case 9:
62  case 10:
63  c->get_pixels = get_pixels_16_c;
64  break;
65  default:
66  c->get_pixels = get_pixels_8_c;
67  break;
68  }
69 
70  if (ARCH_ARM)
71  ff_pixblockdsp_init_arm(c, avctx, high_bit_depth);
72  if (ARCH_PPC)
73  ff_pixblockdsp_init_ppc(c, avctx, high_bit_depth);
74  if (ARCH_X86)
75  ff_pixblockdsp_init_x86(c, avctx, high_bit_depth);
76 }
#define ARCH_ARM
Definition: config.h:14
static void diff_pixels_c(int16_t *restrict block, const uint8_t *s1, const uint8_t *s2, int stride)
Definition: pixblockdsp.c:33
#define ARCH_X86
Definition: config.h:33
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2514
int stride
Definition: mace.c:144
Macro definitions for various function/variable attributes.
uint8_t
#define av_cold
Definition: attributes.h:66
av_cold void ff_pixblockdsp_init_ppc(PixblockDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Definition: pixblockdsp.c:139
void(* diff_pixels)(int16_t *block, const uint8_t *s1, const uint8_t *s2, int stride)
Definition: pixblockdsp.h:30
void(* get_pixels)(int16_t *block, const uint8_t *pixels, int line_size)
Definition: pixblockdsp.h:27
av_cold void ff_pixblockdsp_init_arm(PixblockDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
void ff_pixblockdsp_init_x86(PixblockDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1050
av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
Definition: pixblockdsp.c:54
#define ARCH_PPC
Definition: config.h:24
#define restrict
Definition: config.h:8
static int16_t block[64]
Definition: dct-test.c:88