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1/*
2 * Copyright (C) 2013 Xiaolei Yu <dreifachstein@gmail.com>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "config.h"
22#if HAVE_AS_DN_DIRECTIVE
23#include "rgb2yuv_neon_common.S"
24
25/* downsampled R16G16B16 x8 */
26alias_qw    r16x8,  q7
27alias_qw    g16x8,  q8
28alias_qw    b16x8,  q9
29
30alias   n16x16_l,   q11
31alias   n16x16_h,   q12
32
33alias   y16x16_l,   q13
34alias   y16x16_h,   q14
35
36alias_qw    y8x16,  q15
37
38.macro init     src
39    vld3.i32    {q13_l, q14_l, q15_l},          [\src]!
40    vld3.i32    {q13_h[0], q14_h[0], q15_h[0]}, [\src]
41    vrshrn.i32  CO_R,   q13, #7
42    vrshrn.i32  CO_G,   q14, #7
43    vrshrn.i32  CO_B,   q15, #7
44
45    vmov.u8     BIAS_Y, #16
46    vmov.u8     BIAS_U, #128
47.endm
48
49
50.macro compute_y_16x1_step  action, s8x16, coeff
51    vmovl.u8    n16x16_l,   \s8x16\()_l
52    vmovl.u8    n16x16_h,   \s8x16\()_h
53
54    \action     y16x16_l,   n16x16_l,   \coeff
55    \action     y16x16_h,   n16x16_h,   \coeff
56.endm
57
58.macro compute_y_16x1
59    compute_y_16x1_step vmul, r8x16, CO_RY
60    compute_y_16x1_step vmla, g8x16, CO_GY
61    compute_y_16x1_step vmla, b8x16, CO_BY
62
63    vrshrn.i16  y8x16_l,    y16x16_l,   #8
64    vrshrn.i16  y8x16_h,    y16x16_h,   #8
65
66    vadd.u8     y8x16,      y8x16,      BIAS_Y
67.endm
68
69alias   c16x8,      q15
70alias_qw    c8x8x2, q10
71
72
73.macro compute_chroma_8x1   c, C
74    vmul    c16x8,  r16x8,  CO_R\C
75    vmla    c16x8,  g16x8,  CO_G\C
76    vmla    c16x8,  b16x8,  CO_B\C
77
78    vrshrn.i16  \c\()8x8,   c16x8,      #8
79    vadd.u8     \c\()8x8,   \c\()8x8,   BIAS_\C
80.endm
81
82    loop_420sp  rgbx, nv12, init, kernel_420_16x2, 16
83#endif
84