| /***************************************************************************** |
| * deblock.c: Altivec-accelerated deblocking for h264 encoder |
| ***************************************************************************** |
| * Copyright (C) 2007-2008 Guillaume Poirier <gpoirier@mplayerhq.hu> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA. |
| *****************************************************************************/ |
| |
| #if defined SYS_LINUX |
| #include <altivec.h> |
| #endif |
| |
| #include "common/common.h" |
| #include "ppccommon.h" |
| |
| #define transpose4x16(r0, r1, r2, r3) { \ |
| register vec_u8_t r4; \ |
| register vec_u8_t r5; \ |
| register vec_u8_t r6; \ |
| register vec_u8_t r7; \ |
| \ |
| r4 = vec_mergeh(r0, r2); /*0, 2 set 0*/ \ |
| r5 = vec_mergel(r0, r2); /*0, 2 set 1*/ \ |
| r6 = vec_mergeh(r1, r3); /*1, 3 set 0*/ \ |
| r7 = vec_mergel(r1, r3); /*1, 3 set 1*/ \ |
| \ |
| r0 = vec_mergeh(r4, r6); /*all set 0*/ \ |
| r1 = vec_mergel(r4, r6); /*all set 1*/ \ |
| r2 = vec_mergeh(r5, r7); /*all set 2*/ \ |
| r3 = vec_mergel(r5, r7); /*all set 3*/ \ |
| } |
| |
| static inline void write16x4(uint8_t *dst, int dst_stride, |
| register vec_u8_t r0, register vec_u8_t r1, |
| register vec_u8_t r2, register vec_u8_t r3) { |
| DECLARE_ALIGNED_16(unsigned char result[64]); |
| uint32_t *src_int = (uint32_t *)result, *dst_int = (uint32_t *)dst; |
| int int_dst_stride = dst_stride/4; |
| |
| vec_st(r0, 0, result); |
| vec_st(r1, 16, result); |
| vec_st(r2, 32, result); |
| vec_st(r3, 48, result); |
| /* FIXME: there has to be a better way!!!! */ |
| *dst_int = *src_int; |
| *(dst_int+ int_dst_stride) = *(src_int + 1); |
| *(dst_int+ 2*int_dst_stride) = *(src_int + 2); |
| *(dst_int+ 3*int_dst_stride) = *(src_int + 3); |
| *(dst_int+ 4*int_dst_stride) = *(src_int + 4); |
| *(dst_int+ 5*int_dst_stride) = *(src_int + 5); |
| *(dst_int+ 6*int_dst_stride) = *(src_int + 6); |
| *(dst_int+ 7*int_dst_stride) = *(src_int + 7); |
| *(dst_int+ 8*int_dst_stride) = *(src_int + 8); |
| *(dst_int+ 9*int_dst_stride) = *(src_int + 9); |
| *(dst_int+10*int_dst_stride) = *(src_int + 10); |
| *(dst_int+11*int_dst_stride) = *(src_int + 11); |
| *(dst_int+12*int_dst_stride) = *(src_int + 12); |
| *(dst_int+13*int_dst_stride) = *(src_int + 13); |
| *(dst_int+14*int_dst_stride) = *(src_int + 14); |
| *(dst_int+15*int_dst_stride) = *(src_int + 15); |
| } |
| |
| /** \brief performs a 6x16 transpose of data in src, and stores it to dst */ |
| #define readAndTranspose16x6(src, src_stride, r8, r9, r10, r11, r12, r13) {\ |
| register vec_u8_t r0, r1, r2, r3, r4, r5, r6, r7, r14, r15;\ |
| VEC_LOAD(src, r0, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + src_stride, r1, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 2*src_stride, r2, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 3*src_stride, r3, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 4*src_stride, r4, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 5*src_stride, r5, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 6*src_stride, r6, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 7*src_stride, r7, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 14*src_stride, r14, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 15*src_stride, r15, 16, vec_u8_t, pix ); \ |
| \ |
| VEC_LOAD(src + 8*src_stride, r8, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 9*src_stride, r9, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 10*src_stride, r10, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 11*src_stride, r11, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 12*src_stride, r12, 16, vec_u8_t, pix ); \ |
| VEC_LOAD(src + 13*src_stride, r13, 16, vec_u8_t, pix ); \ |
| \ |
| /*Merge first pairs*/ \ |
| r0 = vec_mergeh(r0, r8); /*0, 8*/ \ |
| r1 = vec_mergeh(r1, r9); /*1, 9*/ \ |
| r2 = vec_mergeh(r2, r10); /*2,10*/ \ |
| r3 = vec_mergeh(r3, r11); /*3,11*/ \ |
| r4 = vec_mergeh(r4, r12); /*4,12*/ \ |
| r5 = vec_mergeh(r5, r13); /*5,13*/ \ |
| r6 = vec_mergeh(r6, r14); /*6,14*/ \ |
| r7 = vec_mergeh(r7, r15); /*7,15*/ \ |
| \ |
| /*Merge second pairs*/ \ |
| r8 = vec_mergeh(r0, r4); /*0,4, 8,12 set 0*/ \ |
| r9 = vec_mergel(r0, r4); /*0,4, 8,12 set 1*/ \ |
| r10 = vec_mergeh(r1, r5); /*1,5, 9,13 set 0*/ \ |
| r11 = vec_mergel(r1, r5); /*1,5, 9,13 set 1*/ \ |
| r12 = vec_mergeh(r2, r6); /*2,6,10,14 set 0*/ \ |
| r13 = vec_mergel(r2, r6); /*2,6,10,14 set 1*/ \ |
| r14 = vec_mergeh(r3, r7); /*3,7,11,15 set 0*/ \ |
| r15 = vec_mergel(r3, r7); /*3,7,11,15 set 1*/ \ |
| \ |
| /*Third merge*/ \ |
| r0 = vec_mergeh(r8, r12); /*0,2,4,6,8,10,12,14 set 0*/ \ |
| r1 = vec_mergel(r8, r12); /*0,2,4,6,8,10,12,14 set 1*/ \ |
| r2 = vec_mergeh(r9, r13); /*0,2,4,6,8,10,12,14 set 2*/ \ |
| r4 = vec_mergeh(r10, r14); /*1,3,5,7,9,11,13,15 set 0*/ \ |
| r5 = vec_mergel(r10, r14); /*1,3,5,7,9,11,13,15 set 1*/ \ |
| r6 = vec_mergeh(r11, r15); /*1,3,5,7,9,11,13,15 set 2*/ \ |
| /* Don't need to compute 3 and 7*/ \ |
| \ |
| /*Final merge*/ \ |
| r8 = vec_mergeh(r0, r4); /*all set 0*/ \ |
| r9 = vec_mergel(r0, r4); /*all set 1*/ \ |
| r10 = vec_mergeh(r1, r5); /*all set 2*/ \ |
| r11 = vec_mergel(r1, r5); /*all set 3*/ \ |
| r12 = vec_mergeh(r2, r6); /*all set 4*/ \ |
| r13 = vec_mergel(r2, r6); /*all set 5*/ \ |
| /* Don't need to compute 14 and 15*/ \ |
| \ |
| } |
| |
| // out: o = |x-y| < a |
| static inline vec_u8_t diff_lt_altivec ( register vec_u8_t x, |
| register vec_u8_t y, |
| register vec_u8_t a) { |
| |
| register vec_u8_t diff = vec_subs(x, y); |
| register vec_u8_t diffneg = vec_subs(y, x); |
| register vec_u8_t o = vec_or(diff, diffneg); /* |x-y| */ |
| o = (vec_u8_t)vec_cmplt(o, a); |
| return o; |
| } |
| |
| static inline vec_u8_t h264_deblock_mask ( register vec_u8_t p0, |
| register vec_u8_t p1, |
| register vec_u8_t q0, |
| register vec_u8_t q1, |
| register vec_u8_t alpha, |
| register vec_u8_t beta) { |
| |
| register vec_u8_t mask; |
| register vec_u8_t tempmask; |
| |
| mask = diff_lt_altivec(p0, q0, alpha); |
| tempmask = diff_lt_altivec(p1, p0, beta); |
| mask = vec_and(mask, tempmask); |
| tempmask = diff_lt_altivec(q1, q0, beta); |
| mask = vec_and(mask, tempmask); |
| |
| return mask; |
| } |
| |
| // out: newp1 = clip((p2 + ((p0 + q0 + 1) >> 1)) >> 1, p1-tc0, p1+tc0) |
| static inline vec_u8_t h264_deblock_q1(register vec_u8_t p0, |
| register vec_u8_t p1, |
| register vec_u8_t p2, |
| register vec_u8_t q0, |
| register vec_u8_t tc0) { |
| |
| register vec_u8_t average = vec_avg(p0, q0); |
| register vec_u8_t temp; |
| register vec_u8_t uncliped; |
| register vec_u8_t ones; |
| register vec_u8_t max; |
| register vec_u8_t min; |
| register vec_u8_t newp1; |
| |
| temp = vec_xor(average, p2); |
| average = vec_avg(average, p2); /*avg(p2, avg(p0, q0)) */ |
| ones = vec_splat_u8(1); |
| temp = vec_and(temp, ones); /*(p2^avg(p0, q0)) & 1 */ |
| uncliped = vec_subs(average, temp); /*(p2+((p0+q0+1)>>1))>>1 */ |
| max = vec_adds(p1, tc0); |
| min = vec_subs(p1, tc0); |
| newp1 = vec_max(min, uncliped); |
| newp1 = vec_min(max, newp1); |
| return newp1; |
| } |
| |
| #define h264_deblock_p0_q0(p0, p1, q0, q1, tc0masked) { \ |
| \ |
| const vec_u8_t A0v = vec_sl(vec_splat_u8(10), vec_splat_u8(4)); \ |
| \ |
| register vec_u8_t pq0bit = vec_xor(p0,q0); \ |
| register vec_u8_t q1minus; \ |
| register vec_u8_t p0minus; \ |
| register vec_u8_t stage1; \ |
| register vec_u8_t stage2; \ |
| register vec_u8_t vec160; \ |
| register vec_u8_t delta; \ |
| register vec_u8_t deltaneg; \ |
| \ |
| q1minus = vec_nor(q1, q1); /* 255 - q1 */ \ |
| stage1 = vec_avg(p1, q1minus); /* (p1 - q1 + 256)>>1 */ \ |
| stage2 = vec_sr(stage1, vec_splat_u8(1)); /* (p1 - q1 + 256)>>2 = 64 + (p1 - q1) >> 2 */ \ |
| p0minus = vec_nor(p0, p0); /* 255 - p0 */ \ |
| stage1 = vec_avg(q0, p0minus); /* (q0 - p0 + 256)>>1 */ \ |
| pq0bit = vec_and(pq0bit, vec_splat_u8(1)); \ |
| stage2 = vec_avg(stage2, pq0bit); /* 32 + ((q0 - p0)&1 + (p1 - q1) >> 2 + 1) >> 1 */\ |
| stage2 = vec_adds(stage2, stage1); /* 160 + ((p0 - q0) + (p1 - q1) >> 2 + 1) >> 1 */ \ |
| vec160 = vec_ld(0, &A0v); \ |
| deltaneg = vec_subs(vec160, stage2); /* -d */ \ |
| delta = vec_subs(stage2, vec160); /* d */ \ |
| deltaneg = vec_min(tc0masked, deltaneg); \ |
| delta = vec_min(tc0masked, delta); \ |
| p0 = vec_subs(p0, deltaneg); \ |
| q0 = vec_subs(q0, delta); \ |
| p0 = vec_adds(p0, delta); \ |
| q0 = vec_adds(q0, deltaneg); \ |
| } |
| |
| #define h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0) { \ |
| DECLARE_ALIGNED_16(unsigned char temp[16]); \ |
| register vec_u8_t alphavec; \ |
| register vec_u8_t betavec; \ |
| register vec_u8_t mask; \ |
| register vec_u8_t p1mask; \ |
| register vec_u8_t q1mask; \ |
| register vec_s8_t tc0vec; \ |
| register vec_u8_t finaltc0; \ |
| register vec_u8_t tc0masked; \ |
| register vec_u8_t newp1; \ |
| register vec_u8_t newq1; \ |
| \ |
| temp[0] = alpha; \ |
| temp[1] = beta; \ |
| alphavec = vec_ld(0, temp); \ |
| betavec = vec_splat(alphavec, 0x1); \ |
| alphavec = vec_splat(alphavec, 0x0); \ |
| mask = h264_deblock_mask(p0, p1, q0, q1, alphavec, betavec); /*if in block */ \ |
| \ |
| *((int *)temp) = *((int *)tc0); \ |
| tc0vec = vec_ld(0, (signed char*)temp); \ |
| tc0vec = vec_mergeh(tc0vec, tc0vec); \ |
| tc0vec = vec_mergeh(tc0vec, tc0vec); \ |
| mask = vec_and(mask, vec_cmpgt(tc0vec, vec_splat_s8(-1))); /* if tc0[i] >= 0 */ \ |
| finaltc0 = vec_and((vec_u8_t)tc0vec, mask); /* tc = tc0 */ \ |
| \ |
| p1mask = diff_lt_altivec(p2, p0, betavec); \ |
| p1mask = vec_and(p1mask, mask); /* if( |p2 - p0| < beta) */ \ |
| tc0masked = vec_and(p1mask, (vec_u8_t)tc0vec); \ |
| finaltc0 = vec_sub(finaltc0, p1mask); /* tc++ */ \ |
| newp1 = h264_deblock_q1(p0, p1, p2, q0, tc0masked); \ |
| /*end if*/ \ |
| \ |
| q1mask = diff_lt_altivec(q2, q0, betavec); \ |
| q1mask = vec_and(q1mask, mask); /* if ( |q2 - q0| < beta ) */\ |
| tc0masked = vec_and(q1mask, (vec_u8_t)tc0vec); \ |
| finaltc0 = vec_sub(finaltc0, q1mask); /* tc++ */ \ |
| newq1 = h264_deblock_q1(p0, q1, q2, q0, tc0masked); \ |
| /*end if*/ \ |
| \ |
| h264_deblock_p0_q0(p0, p1, q0, q1, finaltc0); \ |
| p1 = newp1; \ |
| q1 = newq1; \ |
| } |
| |
| void x264_deblock_v_luma_altivec(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0) { |
| |
| if((tc0[0] & tc0[1] & tc0[2] & tc0[3]) >= 0) { |
| register vec_u8_t p2 = vec_ld(-3*stride, pix); |
| register vec_u8_t p1 = vec_ld(-2*stride, pix); |
| register vec_u8_t p0 = vec_ld(-1*stride, pix); |
| register vec_u8_t q0 = vec_ld(0, pix); |
| register vec_u8_t q1 = vec_ld(stride, pix); |
| register vec_u8_t q2 = vec_ld(2*stride, pix); |
| h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0); |
| vec_st(p1, -2*stride, pix); |
| vec_st(p0, -1*stride, pix); |
| vec_st(q0, 0, pix); |
| vec_st(q1, stride, pix); |
| } |
| } |
| |
| void x264_deblock_h_luma_altivec(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0) { |
| |
| register vec_u8_t line0, line1, line2, line3, line4, line5; |
| if((tc0[0] & tc0[1] & tc0[2] & tc0[3]) < 0) |
| return; |
| PREP_LOAD; |
| vec_u8_t _pix_ = vec_lvsl(0, pix-3); |
| readAndTranspose16x6(pix-3, stride, line0, line1, line2, line3, line4, line5); |
| h264_loop_filter_luma_altivec(line0, line1, line2, line3, line4, line5, alpha, beta, tc0); |
| transpose4x16(line1, line2, line3, line4); |
| write16x4(pix-2, stride, line1, line2, line3, line4); |
| } |
