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/*

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 * Copyright (C) 2013 Xiaolei Yu <[email protected]>

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 *

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 * This file is part of FFmpeg.

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 *

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 * FFmpeg is free software; you can redistribute it and/or

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 * modify it under the terms of the GNU Lesser General Public

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 * License as published by the Free Software Foundation; either

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 * version 2.1 of the License, or (at your option) any later version.

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 *

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 * FFmpeg is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

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 * Lesser General Public License for more details.

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 *

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 * You should have received a copy of the GNU Lesser General Public

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 * License along with FFmpeg; if not, write to the Free Software

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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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 */

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#include "rgb2yuv_neon_common.S"

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/* downsampled R16G16B16 x8 */

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alias_qw    r16x8,  q7

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alias_qw    g16x8,  q8

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alias_qw    b16x8,  q9

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alias   n16x16_l,   q11

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alias   n16x16_h,   q12

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alias   y16x16_l,   q13

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alias   y16x16_h,   q14

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alias_qw    y8x16,  q15

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.macro init     src

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    vld3.i32    {q13_l, q14_l, q15_l},          [\src]!

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    vld3.i32    {q13_h[0], q14_h[0], q15_h[0]}, [\src]

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    vrshrn.i32  CO_R,   q13, #7

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    vrshrn.i32  CO_G,   q14, #7

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    vrshrn.i32  CO_B,   q15, #7

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    vmov.u8     BIAS_Y, #16

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    vmov.u8     BIAS_U, #128

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.endm

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.macro compute_y_16x1_step  action, s8x16, coeff

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    vmovl.u8    n16x16_l,   \s8x16\()_l

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    vmovl.u8    n16x16_h,   \s8x16\()_h

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    \action     y16x16_l,   n16x16_l,   \coeff

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    \action     y16x16_h,   n16x16_h,   \coeff

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.endm

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.macro compute_y_16x1

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    compute_y_16x1_step vmul, r8x16, CO_RY

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    compute_y_16x1_step vmla, g8x16, CO_GY

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    compute_y_16x1_step vmla, b8x16, CO_BY

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    vrshrn.i16  y8x16_l,    y16x16_l,   #8

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    vrshrn.i16  y8x16_h,    y16x16_h,   #8

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    vadd.u8     y8x16,      y8x16,      BIAS_Y

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.endm

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alias   c16x8,      q15

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alias_qw    c8x8x2, q10

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.macro compute_chroma_8x1   c, C

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    vmul    c16x8,  r16x8,  CO_R\C

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    vmla    c16x8,  g16x8,  CO_G\C

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    vmla    c16x8,  b16x8,  CO_B\C

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    vrshrn.i16  \c\()8x8,   c16x8,      #8

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    vadd.u8     \c\()8x8,   \c\()8x8,   BIAS_\C

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.endm

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    loop_420sp  rgbx, nv12, init, kernel_420_16x2, 16

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