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
33void 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 */
38static 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
45static 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
52static 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
59static 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
66av_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