diff options
author | Yu Xiaolei <dreifachstein@gmail.com> | 2013-12-14 11:31:42 +0400 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2013-12-16 03:47:39 +0400 |
commit | 1c67ad9d93031839e6e5032190cd95f6dfda8f59 (patch) | |
tree | dc26d29311dadf3aa3ee0012990256d1dcdef55b /libswscale/arm/rgb2yuv_neon_32.S | |
parent | ffbcb1c6f051a1d000961f3a41d566158f8e9349 (diff) |
swscale: NEON optimized unscaled rgba to nv12 conversion
Signed-off-by: Yu Xiaolei <dreifachstein@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libswscale/arm/rgb2yuv_neon_32.S')
-rw-r--r-- | libswscale/arm/rgb2yuv_neon_32.S | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libswscale/arm/rgb2yuv_neon_32.S b/libswscale/arm/rgb2yuv_neon_32.S new file mode 100644 index 0000000000..f51a5f149f --- /dev/null +++ b/libswscale/arm/rgb2yuv_neon_32.S @@ -0,0 +1,119 @@ +/* + * Copyright (C) 2013 Xiaolei Yu <dreifachstein@gmail.com> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "rgb2yuv_neon_common.S" + +/* downsampled R16G16B16 x8 */ +alias_qw r16x8, q7 +alias_qw g16x8, q8 +alias_qw b16x8, q9 + +alias n16x16_o, q11 +alias n16x16_ol, q11_l +alias n16x16_oh, q11_h + +alias y32x16_el, q12 +alias y32x16_eh, q13 +alias y32x16_ol, q14 +alias y32x16_oh, q15 + +alias y16x16_e, q12 +alias y16x16_el, q12_l +alias y16x16_eh, q12_h +alias y16x16_o, q13 +alias y16x16_ol, q13_l +alias y16x16_oh, q13_h + + +alias y8x16, y16x16_e + + +.macro init src + // load s32x3x3, narrow to s16x3x3 + vld3.i32 {q13_l, q14_l, q15_l}, [\src]! + vld3.i32 {q13_h[0], q14_h[0], q15_h[0]}, [\src] + + vmovn.i32 CO_R, q13 + vmovn.i32 CO_G, q14 + vmovn.i32 CO_B, q15 + + vmov.u8 BIAS_Y, #16 + vmov.u8 BIAS_U, #128 +.endm + + +.macro compute_y_16x1_step action, s8x16, coeff + vmov.u8 n16x16_o, #0 + vtrn.u8 \s8x16, n16x16_o + + \action y32x16_el, \s8x16\()_l, \coeff + \action y32x16_eh, \s8x16\()_h, \coeff + \action y32x16_ol, n16x16_ol, \coeff + \action y32x16_oh, n16x16_oh, \coeff +.endm + +/* + * in: r8x16, g8x16, b8x16 + * out: y8x16 + * clobber: q11-q15, r8x16, g8x16, b8x16 + */ +.macro compute_y_16x1 + compute_y_16x1_step vmull, r8x16, CO_RY + compute_y_16x1_step vmlal, g8x16, CO_GY + compute_y_16x1_step vmlal, b8x16, CO_BY + + vrshrn.i32 y16x16_el, y32x16_el, #15 + vrshrn.i32 y16x16_eh, y32x16_eh, #15 + vrshrn.i32 y16x16_ol, y32x16_ol, #15 + vrshrn.i32 y16x16_oh, y32x16_oh, #15 + + vtrn.8 y16x16_e, y16x16_o + vadd.u8 y8x16, y8x16, BIAS_Y +.endm + +alias c32x8_l, q14 +alias c32x8_h, q15 + +alias_qw c16x8, q13 +alias_qw c8x8x2, q10 + +.macro compute_chroma_8x1_step action, s16x8, coeff + \action c32x8_l, \s16x8\()_l, \coeff + \action c32x8_h, \s16x8\()_h, \coeff +.endm + +/* + * in: r16x8, g16x8, b16x8 + * out: c8x8 + * clobber: q14-q15 + */ +.macro compute_chroma_8x1 c, C + compute_chroma_8x1_step vmull, r16x8, CO_R\C + compute_chroma_8x1_step vmlal, g16x8, CO_G\C + compute_chroma_8x1_step vmlal, b16x8, CO_B\C + + vrshrn.i32 c16x8_l, c32x8_l, #15 + vrshrn.i32 c16x8_h, c32x8_h, #15 + vmovn.i16 \c\()8x8, c16x8 + vadd.u8 \c\()8x8, \c\()8x8, BIAS_\C +.endm + + + loop_420sp rgbx, nv12, init, kernel_420_16x2, 32 |