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deblock.c
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上传日期：2021-12-09
资源大小：5084k
文件大小：17k
源码类别：
Audio
开发平台：
Visual C++
- /*****************************************************************************
- * 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
- todo FIXME: see if we can't spare some vec_lvsl() by them factorizing
- out of unaligned_load() */
- #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);
- VEC_LOAD(src + src_stride, r1, 16, vec_u8_t);
- VEC_LOAD(src + 2*src_stride, r2, 16, vec_u8_t);
- VEC_LOAD(src + 3*src_stride, r3, 16, vec_u8_t);
- VEC_LOAD(src + 4*src_stride, r4, 16, vec_u8_t);
- VEC_LOAD(src + 5*src_stride, r5, 16, vec_u8_t);
- VEC_LOAD(src + 6*src_stride, r6, 16, vec_u8_t);
- VEC_LOAD(src + 7*src_stride, r7, 16, vec_u8_t);
- VEC_LOAD(src + 14*src_stride, r14, 16, vec_u8_t);
- VEC_LOAD(src + 15*src_stride, r15, 16, vec_u8_t);
- VEC_LOAD(src + 8*src_stride, r8, 16, vec_u8_t);
- VEC_LOAD(src + 9*src_stride, r9, 16, vec_u8_t);
- VEC_LOAD(src + 10*src_stride, r10, 16, vec_u8_t);
- VEC_LOAD(src + 11*src_stride, r11, 16, vec_u8_t);
- VEC_LOAD(src + 12*src_stride, r12, 16, vec_u8_t);
- VEC_LOAD(src + 13*src_stride, r13, 16, vec_u8_t);
- /*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;
- 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);
- }
