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/*****************************************************************************
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* deblock.c: ppc deblocking
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*****************************************************************************
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* Copyright (C) 2007-2016 x264 project
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*
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* Authors: Guillaume Poirier <[email protected]>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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*
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* This program is also available under a commercial proprietary license.
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* For more information, contact us at [email protected].
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*****************************************************************************/
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#include "common/common.h"
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#include "ppccommon.h"
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#if !HIGH_BIT_DEPTH
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#define transpose4x16(r0, r1, r2, r3) \
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{ \
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register vec_u8_t r4; \
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register vec_u8_t r5; \
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register vec_u8_t r6; \
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register vec_u8_t r7; \
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\
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r4 = vec_mergeh(r0, r2); /*0, 2 set 0*/ \
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r5 = vec_mergel(r0, r2); /*0, 2 set 1*/ \
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r6 = vec_mergeh(r1, r3); /*1, 3 set 0*/ \
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r7 = vec_mergel(r1, r3); /*1, 3 set 1*/ \
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\
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r0 = vec_mergeh(r4, r6); /*all set 0*/ \
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r1 = vec_mergel(r4, r6); /*all set 1*/ \
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r2 = vec_mergeh(r5, r7); /*all set 2*/ \
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r3 = vec_mergel(r5, r7); /*all set 3*/ \
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}
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static inline void write16x4( uint8_t *dst, int dst_stride,
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register vec_u8_t r0, register vec_u8_t r1,
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register vec_u8_t r2, register vec_u8_t r3 )
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{
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ALIGNED_16(unsigned char result[64]);
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uint32_t *src_int = (uint32_t *)result, *dst_int = (uint32_t *)dst;
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int int_dst_stride = dst_stride >> 2;
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vec_st(r0, 0, result);
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vec_st(r1, 16, result);
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vec_st(r2, 32, result);
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vec_st(r3, 48, result);
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/* FIXME: there has to be a better way!!!! */
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*dst_int = *src_int;
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*(dst_int+ int_dst_stride) = *(src_int + 1);
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*(dst_int+ 2*int_dst_stride) = *(src_int + 2);
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*(dst_int+ 3*int_dst_stride) = *(src_int + 3);
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*(dst_int+ 4*int_dst_stride) = *(src_int + 4);
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*(dst_int+ 5*int_dst_stride) = *(src_int + 5);
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*(dst_int+ 6*int_dst_stride) = *(src_int + 6);
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*(dst_int+ 7*int_dst_stride) = *(src_int + 7);
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*(dst_int+ 8*int_dst_stride) = *(src_int + 8);
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*(dst_int+ 9*int_dst_stride) = *(src_int + 9);
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*(dst_int+10*int_dst_stride) = *(src_int + 10);
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*(dst_int+11*int_dst_stride) = *(src_int + 11);
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*(dst_int+12*int_dst_stride) = *(src_int + 12);
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*(dst_int+13*int_dst_stride) = *(src_int + 13);
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*(dst_int+14*int_dst_stride) = *(src_int + 14);
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*(dst_int+15*int_dst_stride) = *(src_int + 15);
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}
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/** \brief performs a 6x16 transpose of data in src, and stores it to dst */
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#define read_and_transpose16x6(src, src_stride, r8, r9, r10, r11, r12, r13)\
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{\
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register vec_u8_t r0, r1, r2, r3, r4, r5, r6, r7, r14, r15;\
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VEC_LOAD(src, r0, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + src_stride, r1, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 2*src_stride, r2, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 3*src_stride, r3, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 4*src_stride, r4, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 5*src_stride, r5, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 6*src_stride, r6, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 7*src_stride, r7, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 14*src_stride, r14, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 15*src_stride, r15, 16, vec_u8_t, pix ); \
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\
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VEC_LOAD(src + 8*src_stride, r8, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 9*src_stride, r9, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 10*src_stride, r10, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 11*src_stride, r11, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 12*src_stride, r12, 16, vec_u8_t, pix ); \
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VEC_LOAD(src + 13*src_stride, r13, 16, vec_u8_t, pix ); \
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\
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/*Merge first pairs*/ \
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r0 = vec_mergeh(r0, r8); /*0, 8*/ \
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r1 = vec_mergeh(r1, r9); /*1, 9*/ \
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r2 = vec_mergeh(r2, r10); /*2,10*/ \
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r3 = vec_mergeh(r3, r11); /*3,11*/ \
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r4 = vec_mergeh(r4, r12); /*4,12*/ \
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r5 = vec_mergeh(r5, r13); /*5,13*/ \
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r6 = vec_mergeh(r6, r14); /*6,14*/ \
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r7 = vec_mergeh(r7, r15); /*7,15*/ \
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\
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/*Merge second pairs*/ \
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r8 = vec_mergeh(r0, r4); /*0,4, 8,12 set 0*/ \
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r9 = vec_mergel(r0, r4); /*0,4, 8,12 set 1*/ \
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r10 = vec_mergeh(r1, r5); /*1,5, 9,13 set 0*/ \
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r11 = vec_mergel(r1, r5); /*1,5, 9,13 set 1*/ \
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r12 = vec_mergeh(r2, r6); /*2,6,10,14 set 0*/ \
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r13 = vec_mergel(r2, r6); /*2,6,10,14 set 1*/ \
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r14 = vec_mergeh(r3, r7); /*3,7,11,15 set 0*/ \
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r15 = vec_mergel(r3, r7); /*3,7,11,15 set 1*/ \
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\
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/*Third merge*/ \
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r0 = vec_mergeh(r8, r12); /*0,2,4,6,8,10,12,14 set 0*/ \
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r1 = vec_mergel(r8, r12); /*0,2,4,6,8,10,12,14 set 1*/ \
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r2 = vec_mergeh(r9, r13); /*0,2,4,6,8,10,12,14 set 2*/ \
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r4 = vec_mergeh(r10, r14); /*1,3,5,7,9,11,13,15 set 0*/ \
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r5 = vec_mergel(r10, r14); /*1,3,5,7,9,11,13,15 set 1*/ \
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r6 = vec_mergeh(r11, r15); /*1,3,5,7,9,11,13,15 set 2*/ \
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/* Don't need to compute 3 and 7*/ \
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\
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/*Final merge*/ \
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r8 = vec_mergeh(r0, r4); /*all set 0*/ \
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r9 = vec_mergel(r0, r4); /*all set 1*/ \
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r10 = vec_mergeh(r1, r5); /*all set 2*/ \
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r11 = vec_mergel(r1, r5); /*all set 3*/ \
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r12 = vec_mergeh(r2, r6); /*all set 4*/ \
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r13 = vec_mergel(r2, r6); /*all set 5*/ \
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/* Don't need to compute 14 and 15*/ \
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\
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}
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// out: o = |x-y| < a
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static inline vec_u8_t diff_lt_altivec( register vec_u8_t x, register vec_u8_t y, register vec_u8_t a )
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{
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register vec_u8_t diff = vec_subs(x, y);
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register vec_u8_t diffneg = vec_subs(y, x);
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register vec_u8_t o = vec_or(diff, diffneg); /* |x-y| */
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o = (vec_u8_t)vec_cmplt(o, a);
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return o;
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}
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static inline vec_u8_t h264_deblock_mask( register vec_u8_t p0, register vec_u8_t p1, register vec_u8_t q0,
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register vec_u8_t q1, register vec_u8_t alpha, register vec_u8_t beta )
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{
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register vec_u8_t mask;
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register vec_u8_t tempmask;
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mask = diff_lt_altivec(p0, q0, alpha);
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tempmask = diff_lt_altivec(p1, p0, beta);
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mask = vec_and(mask, tempmask);
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tempmask = diff_lt_altivec(q1, q0, beta);
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mask = vec_and(mask, tempmask);
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return mask;
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}
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// out: newp1 = clip((p2 + ((p0 + q0 + 1) >> 1)) >> 1, p1-tc0, p1+tc0)
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static inline vec_u8_t h264_deblock_q1( register vec_u8_t p0, register vec_u8_t p1, register vec_u8_t p2,
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register vec_u8_t q0, register vec_u8_t tc0 )
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{
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register vec_u8_t average = vec_avg(p0, q0);
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register vec_u8_t temp;
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register vec_u8_t uncliped;
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register vec_u8_t ones;
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register vec_u8_t max;
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register vec_u8_t min;
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register vec_u8_t newp1;
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temp = vec_xor(average, p2);
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average = vec_avg(average, p2); /*avg(p2, avg(p0, q0)) */
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ones = vec_splat_u8(1);
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temp = vec_and(temp, ones); /*(p2^avg(p0, q0)) & 1 */
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uncliped = vec_subs(average, temp); /*(p2+((p0+q0+1)>>1))>>1 */
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max = vec_adds(p1, tc0);
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min = vec_subs(p1, tc0);
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newp1 = vec_max(min, uncliped);
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newp1 = vec_min(max, newp1);
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return newp1;
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}
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#define h264_deblock_p0_q0(p0, p1, q0, q1, tc0masked) \
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{ \
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const vec_u8_t A0v = vec_sl(vec_splat_u8(10), vec_splat_u8(4)); \
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\
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register vec_u8_t pq0bit = vec_xor(p0,q0); \
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register vec_u8_t q1minus; \
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register vec_u8_t p0minus; \
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register vec_u8_t stage1; \
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register vec_u8_t stage2; \
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register vec_u8_t vec160; \
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register vec_u8_t delta; \
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register vec_u8_t deltaneg; \
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\
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q1minus = vec_nor(q1, q1); /* 255 - q1 */ \
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stage1 = vec_avg(p1, q1minus); /* (p1 - q1 + 256)>>1 */ \
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stage2 = vec_sr(stage1, vec_splat_u8(1)); /* (p1 - q1 + 256)>>2 = 64 + (p1 - q1) >> 2 */ \
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p0minus = vec_nor(p0, p0); /* 255 - p0 */ \
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stage1 = vec_avg(q0, p0minus); /* (q0 - p0 + 256)>>1 */ \
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pq0bit = vec_and(pq0bit, vec_splat_u8(1)); \
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stage2 = vec_avg(stage2, pq0bit); /* 32 + ((q0 - p0)&1 + (p1 - q1) >> 2 + 1) >> 1 */\
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stage2 = vec_adds(stage2, stage1); /* 160 + ((p0 - q0) + (p1 - q1) >> 2 + 1) >> 1 */ \
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vec160 = vec_ld(0, &A0v); \
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deltaneg = vec_subs(vec160, stage2); /* -d */ \
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delta = vec_subs(stage2, vec160); /* d */ \
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deltaneg = vec_min(tc0masked, deltaneg); \
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delta = vec_min(tc0masked, delta); \
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p0 = vec_subs(p0, deltaneg); \
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q0 = vec_subs(q0, delta); \
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p0 = vec_adds(p0, delta); \
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q0 = vec_adds(q0, deltaneg); \
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}
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#define h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0) \
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{ \
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ALIGNED_16(unsigned char temp[16]); \
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register vec_u8_t alphavec; \
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register vec_u8_t betavec; \
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register vec_u8_t mask; \
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register vec_u8_t p1mask; \
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register vec_u8_t q1mask; \
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register vec_s8_t tc0vec; \
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register vec_u8_t finaltc0; \
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register vec_u8_t tc0masked; \
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register vec_u8_t newp1; \
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register vec_u8_t newq1; \
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\
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temp[0] = alpha; \
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temp[1] = beta; \
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alphavec = vec_ld(0, temp); \
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betavec = vec_splat(alphavec, 0x1); \
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alphavec = vec_splat(alphavec, 0x0); \
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mask = h264_deblock_mask(p0, p1, q0, q1, alphavec, betavec); /*if in block */ \
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\
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M32( temp ) = M32( tc0 ); \
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tc0vec = vec_ld(0, (signed char*)temp); \
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tc0vec = vec_mergeh(tc0vec, tc0vec); \
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tc0vec = vec_mergeh(tc0vec, tc0vec); \
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mask = vec_and(mask, vec_cmpgt(tc0vec, vec_splat_s8(-1))); /* if tc0[i] >= 0 */ \
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finaltc0 = vec_and((vec_u8_t)tc0vec, mask); /* tc = tc0 */ \
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\
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p1mask = diff_lt_altivec(p2, p0, betavec); \
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p1mask = vec_and(p1mask, mask); /* if( |p2 - p0| < beta) */ \
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tc0masked = vec_and(p1mask, (vec_u8_t)tc0vec); \
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finaltc0 = vec_sub(finaltc0, p1mask); /* tc++ */ \
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newp1 = h264_deblock_q1(p0, p1, p2, q0, tc0masked); \
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/*end if*/ \
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\
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q1mask = diff_lt_altivec(q2, q0, betavec); \
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q1mask = vec_and(q1mask, mask); /* if ( |q2 - q0| < beta ) */\
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tc0masked = vec_and(q1mask, (vec_u8_t)tc0vec); \
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finaltc0 = vec_sub(finaltc0, q1mask); /* tc++ */ \
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newq1 = h264_deblock_q1(p0, q1, q2, q0, tc0masked); \
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/*end if*/ \
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\
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h264_deblock_p0_q0(p0, p1, q0, q1, finaltc0); \
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p1 = newp1; \
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q1 = newq1; \
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}
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void x264_deblock_v_luma_altivec( uint8_t *pix, intptr_t stride, int alpha, int beta, int8_t *tc0 )
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{
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if( (tc0[0] & tc0[1] & tc0[2] & tc0[3]) >= 0 )
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{
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register vec_u8_t p2 = vec_ld(-3*stride, pix);
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register vec_u8_t p1 = vec_ld(-2*stride, pix);
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register vec_u8_t p0 = vec_ld(-1*stride, pix);
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register vec_u8_t q0 = vec_ld(0, pix);
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register vec_u8_t q1 = vec_ld(stride, pix);
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register vec_u8_t q2 = vec_ld(2*stride, pix);
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h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0);
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vec_st(p1, -2*stride, pix);
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vec_st(p0, -1*stride, pix);
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vec_st(q0, 0, pix);
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vec_st(q1, stride, pix);
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}
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}
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void x264_deblock_h_luma_altivec( uint8_t *pix, intptr_t stride, int alpha, int beta, int8_t *tc0 )
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{
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register vec_u8_t line0, line1, line2, line3, line4, line5;
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if( (tc0[0] & tc0[1] & tc0[2] & tc0[3]) < 0 )
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return;
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PREP_LOAD;
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vec_u8_t _pix_ = vec_lvsl(0, pix-3);
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read_and_transpose16x6(pix-3, stride, line0, line1, line2, line3, line4, line5);
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h264_loop_filter_luma_altivec(line0, line1, line2, line3, line4, line5, alpha, beta, tc0);
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transpose4x16(line1, line2, line3, line4);
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write16x4(pix-2, stride, line1, line2, line3, line4);
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}
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#endif // !HIGH_BIT_DEPTH
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