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 "rgb2yuv_neon_common.S"
22
23/* downsampled R16G16B16 x8 */
24alias_qw    r16x8,  q7
25alias_qw    g16x8,  q8
26alias_qw    b16x8,  q9
27
28alias   n16x16_l,   q11
29alias   n16x16_h,   q12
30
31alias   y16x16_l,   q13
32alias   y16x16_h,   q14
33
34alias_qw    y8x16,  q15
35
36.macro init     src
37    vld3.i32    {q13_l, q14_l, q15_l},          [\src]!
38    vld3.i32    {q13_h[0], q14_h[0], q15_h[0]}, [\src]
39    vrshrn.i32  CO_R,   q13, #7
40    vrshrn.i32  CO_G,   q14, #7
41    vrshrn.i32  CO_B,   q15, #7
42
43    vmov.u8     BIAS_Y, #16
44    vmov.u8     BIAS_U, #128
45.endm
46
47
48.macro compute_y_16x1_step  action, s8x16, coeff
49    vmovl.u8    n16x16_l,   \s8x16\()_l
50    vmovl.u8    n16x16_h,   \s8x16\()_h
51
52    \action     y16x16_l,   n16x16_l,   \coeff
53    \action     y16x16_h,   n16x16_h,   \coeff
54.endm
55
56.macro compute_y_16x1
57    compute_y_16x1_step vmul, r8x16, CO_RY
58    compute_y_16x1_step vmla, g8x16, CO_GY
59    compute_y_16x1_step vmla, b8x16, CO_BY
60
61    vrshrn.i16  y8x16_l,    y16x16_l,   #8
62    vrshrn.i16  y8x16_h,    y16x16_h,   #8
63
64    vadd.u8     y8x16,      y8x16,      BIAS_Y
65.endm
66
67alias   c16x8,      q15
68alias_qw    c8x8x2, q10
69
70
71.macro compute_chroma_8x1   c, C
72    vmul    c16x8,  r16x8,  CO_R\C
73    vmla    c16x8,  g16x8,  CO_G\C
74    vmla    c16x8,  b16x8,  CO_B\C
75
76    vrshrn.i16  \c\()8x8,   c16x8,      #8
77    vadd.u8     \c\()8x8,   \c\()8x8,   BIAS_\C
78.endm
79
80    loop_420sp  rgbx, nv12, init, kernel_420_16x2, 16
81