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https://github.com/FFmpeg/FFmpeg.git
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f33f728470
Vanilla clang supports altmacro since clang 5.0, and thus doesn't
require gas-preprocessor for building the arm assembly any longer.
However, the built-in assembler doesn't support .dn directives.
This readds checks that were removed in d7320ca3ed, when
the last usage of .dn directives within libav were removed.
Alternatively, the assembly could be rewritten to not use the
.dn directive, making it available to clang users.
Signed-off-by: Martin Storsjö <martin@martin.st>
123 lines
3.2 KiB
ArmAsm
123 lines
3.2 KiB
ArmAsm
/*
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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 "config.h"
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#if HAVE_AS_DN_DIRECTIVE
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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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#endif
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