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 <stddef.h>
23 #include <stdint.h>
24
25 #include "libavutil/attributes.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/arm/cpu.h"
28 #include "libavcodec/avcodec.h"
29 #include "libavcodec/idctdsp.h"
30 #include "idct.h"
31 #include "idctdsp_arm.h"
32
33 void ff_add_pixels_clamped_arm(const int16_t *block, uint8_t *dest,
34 ptrdiff_t line_size);
35
36 /* XXX: those functions should be suppressed ASAP when all IDCTs are
37 * converted */
j_rev_dct_arm_put(uint8_t * dest,ptrdiff_t line_size,int16_t * block)38 static void j_rev_dct_arm_put(uint8_t *dest, ptrdiff_t line_size,
39 int16_t *block)
40 {
41 ff_j_rev_dct_arm(block);
42 ff_put_pixels_clamped_c(block, dest, line_size);
43 }
44
j_rev_dct_arm_add(uint8_t * dest,ptrdiff_t line_size,int16_t * block)45 static void j_rev_dct_arm_add(uint8_t *dest, ptrdiff_t line_size,
46 int16_t *block)
47 {
48 ff_j_rev_dct_arm(block);
49 ff_add_pixels_clamped_arm(block, dest, line_size);
50 }
51
simple_idct_arm_put(uint8_t * dest,ptrdiff_t line_size,int16_t * block)52 static void simple_idct_arm_put(uint8_t *dest, ptrdiff_t line_size,
53 int16_t *block)
54 {
55 ff_simple_idct_arm(block);
56 ff_put_pixels_clamped_c(block, dest, line_size);
57 }
58
simple_idct_arm_add(uint8_t * dest,ptrdiff_t line_size,int16_t * block)59 static void simple_idct_arm_add(uint8_t *dest, ptrdiff_t line_size,
60 int16_t *block)
61 {
62 ff_simple_idct_arm(block);
63 ff_add_pixels_clamped_arm(block, dest, line_size);
64 }
65
ff_idctdsp_init_arm(IDCTDSPContext * c,AVCodecContext * avctx,unsigned high_bit_depth)66 av_cold void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx,
67 unsigned high_bit_depth)
68 {
69 int cpu_flags = av_get_cpu_flags();
70
71 if (!avctx->lowres && !high_bit_depth) {
72 if ((avctx->idct_algo == FF_IDCT_AUTO && !(avctx->flags & AV_CODEC_FLAG_BITEXACT)) ||
73 avctx->idct_algo == FF_IDCT_ARM) {
74 c->idct_put = j_rev_dct_arm_put;
75 c->idct_add = j_rev_dct_arm_add;
76 c->idct = ff_j_rev_dct_arm;
77 c->perm_type = FF_IDCT_PERM_LIBMPEG2;
78 } else if (avctx->idct_algo == FF_IDCT_SIMPLEARM) {
79 c->idct_put = simple_idct_arm_put;
80 c->idct_add = simple_idct_arm_add;
81 c->idct = ff_simple_idct_arm;
82 c->perm_type = FF_IDCT_PERM_NONE;
83 }
84 }
85
86 c->add_pixels_clamped = ff_add_pixels_clamped_arm;
87
88 if (have_armv5te(cpu_flags))
89 ff_idctdsp_init_armv5te(c, avctx, high_bit_depth);
90 if (have_armv6(cpu_flags))
91 ff_idctdsp_init_armv6(c, avctx, high_bit_depth);
92 if (have_neon(cpu_flags))
93 ff_idctdsp_init_neon(c, avctx, high_bit_depth);
94 }
95