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120 lines
3.2 KiB
120 lines
3.2 KiB
11 years ago
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/*
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* Copyright (C) 2013 Xiaolei Yu <dreifachstein@gmail.com>
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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_o, q11
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alias n16x16_ol, q11_l
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alias n16x16_oh, q11_h
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alias y32x16_el, q12
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alias y32x16_eh, q13
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alias y32x16_ol, q14
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alias y32x16_oh, q15
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alias y16x16_e, q12
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alias y16x16_el, q12_l
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alias y16x16_eh, q12_h
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alias y16x16_o, q13
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alias y16x16_ol, q13_l
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alias y16x16_oh, q13_h
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alias y8x16, y16x16_e
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.macro init src
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// load s32x3x3, narrow to s16x3x3
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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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vmovn.i32 CO_R, q13
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vmovn.i32 CO_G, q14
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vmovn.i32 CO_B, q15
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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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vmov.u8 n16x16_o, #0
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vtrn.u8 \s8x16, n16x16_o
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\action y32x16_el, \s8x16\()_l, \coeff
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\action y32x16_eh, \s8x16\()_h, \coeff
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\action y32x16_ol, n16x16_ol, \coeff
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\action y32x16_oh, n16x16_oh, \coeff
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.endm
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/*
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* in: r8x16, g8x16, b8x16
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* out: y8x16
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* clobber: q11-q15, r8x16, g8x16, b8x16
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*/
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.macro compute_y_16x1
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compute_y_16x1_step vmull, r8x16, CO_RY
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compute_y_16x1_step vmlal, g8x16, CO_GY
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compute_y_16x1_step vmlal, b8x16, CO_BY
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vrshrn.i32 y16x16_el, y32x16_el, #15
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vrshrn.i32 y16x16_eh, y32x16_eh, #15
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vrshrn.i32 y16x16_ol, y32x16_ol, #15
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vrshrn.i32 y16x16_oh, y32x16_oh, #15
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vtrn.8 y16x16_e, y16x16_o
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vadd.u8 y8x16, y8x16, BIAS_Y
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.endm
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alias c32x8_l, q14
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alias c32x8_h, q15
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alias_qw c16x8, q13
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alias_qw c8x8x2, q10
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.macro compute_chroma_8x1_step action, s16x8, coeff
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\action c32x8_l, \s16x8\()_l, \coeff
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\action c32x8_h, \s16x8\()_h, \coeff
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.endm
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/*
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* in: r16x8, g16x8, b16x8
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* out: c8x8
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* clobber: q14-q15
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*/
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.macro compute_chroma_8x1 c, C
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compute_chroma_8x1_step vmull, r16x8, CO_R\C
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compute_chroma_8x1_step vmlal, g16x8, CO_G\C
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compute_chroma_8x1_step vmlal, b16x8, CO_B\C
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vrshrn.i32 c16x8_l, c32x8_l, #15
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vrshrn.i32 c16x8_h, c32x8_h, #15
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vmovn.i16 \c\()8x8, c16x8
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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, 32
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