FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
idctdsp_init_arm.c
Go to the documentation of this file.
1 /*
2  * ARM-optimized IDCT functions
3  * Copyright (c) 2001 Lionel Ulmer
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include <stdint.h>
23 
24 #include "libavutil/attributes.h"
25 #include "libavutil/cpu.h"
26 #include "libavutil/arm/cpu.h"
27 #include "libavcodec/avcodec.h"
28 #include "libavcodec/idctdsp.h"
29 #include "idct.h"
30 #include "idctdsp_arm.h"
31 
32 void ff_add_pixels_clamped_arm(const int16_t *block, uint8_t *dest,
33  ptrdiff_t line_size);
34 
35 /* XXX: those functions should be suppressed ASAP when all IDCTs are
36  * converted */
37 static void j_rev_dct_arm_put(uint8_t *dest, int line_size, int16_t *block)
38 {
39  ff_j_rev_dct_arm(block);
40  ff_put_pixels_clamped(block, dest, line_size);
41 }
42 
43 static void j_rev_dct_arm_add(uint8_t *dest, int line_size, int16_t *block)
44 {
45  ff_j_rev_dct_arm(block);
46  ff_add_pixels_clamped(block, dest, line_size);
47 }
48 
49 static void simple_idct_arm_put(uint8_t *dest, int line_size, int16_t *block)
50 {
51  ff_simple_idct_arm(block);
52  ff_put_pixels_clamped(block, dest, line_size);
53 }
54 
55 static void simple_idct_arm_add(uint8_t *dest, int line_size, int16_t *block)
56 {
57  ff_simple_idct_arm(block);
58  ff_add_pixels_clamped(block, dest, line_size);
59 }
60 
62  unsigned high_bit_depth)
63 {
64  int cpu_flags = av_get_cpu_flags();
65 
66  if (!avctx->lowres && !high_bit_depth) {
67  if ((avctx->idct_algo == FF_IDCT_AUTO && !(avctx->flags & AV_CODEC_FLAG_BITEXACT)) ||
68  avctx->idct_algo == FF_IDCT_ARM) {
73  } else if (avctx->idct_algo == FF_IDCT_SIMPLEARM) {
78  }
79  }
80 
82 
83  if (have_armv5te(cpu_flags))
84  ff_idctdsp_init_armv5te(c, avctx, high_bit_depth);
85  if (have_armv6(cpu_flags))
86  ff_idctdsp_init_armv6(c, avctx, high_bit_depth);
87  if (have_neon(cpu_flags))
88  ff_idctdsp_init_neon(c, avctx, high_bit_depth);
89 }
void ff_simple_idct_arm(int16_t *data)
static void j_rev_dct_arm_add(uint8_t *dest, int line_size, int16_t *block)
void(* ff_put_pixels_clamped)(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size)
Definition: idctdsp.c:83
#define have_armv6(flags)
Definition: cpu.h:27
void ff_idctdsp_init_neon(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Macro definitions for various function/variable attributes.
static void simple_idct_arm_put(uint8_t *dest, int line_size, int16_t *block)
static int16_t block[64]
Definition: dct.c:113
uint8_t
#define av_cold
Definition: attributes.h:82
#define have_armv5te(flags)
Definition: cpu.h:26
void(* ff_add_pixels_clamped)(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size)
Definition: idctdsp.c:84
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:3087
#define FF_IDCT_ARM
Definition: avcodec.h:3040
#define FF_IDCT_AUTO
Definition: avcodec.h:3036
#define FF_IDCT_SIMPLEARM
Definition: avcodec.h:3045
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1771
static void simple_idct_arm_add(uint8_t *dest, int line_size, int16_t *block)
void(* add_pixels_clamped)(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size)
Definition: idctdsp.h:59
static void j_rev_dct_arm_put(uint8_t *dest, int line_size, int16_t *block)
void ff_j_rev_dct_arm(int16_t *data)
#define have_neon(flags)
Definition: cpu.h:27
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:886
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:3035
AVCodecContext * avctx
Definition: apedec.c:138
void ff_idctdsp_init_armv5te(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
void(* idct_add)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:77
void ff_idctdsp_init_armv6(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:70
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1676
av_cold void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:76
static double c[64]
void ff_add_pixels_clamped_arm(const int16_t *block, uint8_t *dest, ptrdiff_t line_size)
enum idct_permutation_type perm_type
Definition: idctdsp.h:95
void(* idct)(int16_t *block)
Definition: idctdsp.h:63