/***************************************************************************** * predict.c: ppc intra prediction ***************************************************************************** * Copyright (C) 2007-2013 x264 project * * Authors: Guillaume Poirier * * 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. * * This program is also available under a commercial proprietary license. * For more information, contact us at licensing@x264.com. *****************************************************************************/ #include "common/common.h" #include "predict.h" #include "pixel.h" #include "ppccommon.h" #if !HIGH_BIT_DEPTH static void predict_8x8c_p_altivec( uint8_t *src ) { int H = 0, V = 0; for( int i = 0; i < 4; i++ ) { H += ( i + 1 ) * ( src[4+i - FDEC_STRIDE] - src[2 - i -FDEC_STRIDE] ); V += ( i + 1 ) * ( src[-1 +(i+4)*FDEC_STRIDE] - src[-1+(2-i)*FDEC_STRIDE] ); } int a = 16 * ( src[-1+7*FDEC_STRIDE] + src[7 - FDEC_STRIDE] ); int b = ( 17 * H + 16 ) >> 5; int c = ( 17 * V + 16 ) >> 5; int i00 = a -3*b -3*c + 16; vec_s16_u i00_u, b_u, c_u; i00_u.s[0] = i00; b_u.s[0] = b; c_u.s[0] = c; vec_u16_t val5_v = vec_splat_u16(5); vec_s16_t i00_v, b_v, c_v; i00_v = vec_splat(i00_u.v, 0); b_v = vec_splat(b_u.v, 0); c_v = vec_splat(c_u.v, 0); vec_s16_t induc_v = (vec_s16_t) CV(0, 1, 2, 3, 4, 5, 6, 7); vec_s16_t add_i0_b_0v = vec_mladd(induc_v, b_v, i00_v); PREP_STORE8; for( int i = 0; i < 8; ++i ) { vec_s16_t shift_0_v = vec_sra(add_i0_b_0v, val5_v); vec_u8_t com_sat_v = vec_packsu(shift_0_v, shift_0_v); VEC_STORE8(com_sat_v, &src[0]); src += FDEC_STRIDE; add_i0_b_0v = vec_adds(add_i0_b_0v, c_v); } } /**************************************************************************** * 16x16 prediction for intra luma block ****************************************************************************/ static void predict_16x16_p_altivec( uint8_t *src ) { int H = 0, V = 0; for( int i = 1; i <= 8; i++ ) { H += i * ( src[7+i - FDEC_STRIDE ] - src[7-i - FDEC_STRIDE ] ); V += i * ( src[(7+i)*FDEC_STRIDE -1] - src[(7-i)*FDEC_STRIDE -1] ); } int a = 16 * ( src[15*FDEC_STRIDE -1] + src[15 - FDEC_STRIDE] ); int b = ( 5 * H + 32 ) >> 6; int c = ( 5 * V + 32 ) >> 6; int i00 = a - b * 7 - c * 7 + 16; vec_s16_u i00_u, b_u, c_u; i00_u.s[0] = i00; b_u.s[0] = b; c_u.s[0] = c; vec_u16_t val5_v = vec_splat_u16(5); vec_s16_t i00_v, b_v, c_v; i00_v = vec_splat(i00_u.v, 0); b_v = vec_splat(b_u.v, 0); c_v = vec_splat(c_u.v, 0); vec_s16_t induc_v = (vec_s16_t) CV(0, 1, 2, 3, 4, 5, 6, 7); vec_s16_t b8_v = vec_sl(b_v, vec_splat_u16(3)); vec_s16_t add_i0_b_0v = vec_mladd(induc_v, b_v, i00_v); vec_s16_t add_i0_b_8v = vec_adds(b8_v, add_i0_b_0v); for( int y = 0; y < 16; y++ ) { vec_s16_t shift_0_v = vec_sra(add_i0_b_0v, val5_v); vec_s16_t shift_8_v = vec_sra(add_i0_b_8v, val5_v); vec_u8_t com_sat_v = vec_packsu(shift_0_v, shift_8_v); vec_st( com_sat_v, 0, &src[0]); src += FDEC_STRIDE; add_i0_b_0v = vec_adds(add_i0_b_0v, c_v); add_i0_b_8v = vec_adds(add_i0_b_8v, c_v); } } #define PREDICT_16x16_DC_ALTIVEC(v) \ for( int i = 0; i < 16; i += 2) \ { \ vec_st(v, 0, src); \ vec_st(v, FDEC_STRIDE, src); \ src += FDEC_STRIDE*2; \ } static void predict_16x16_dc_altivec( uint8_t *src ) { uint32_t dc = 0; for( int i = 0; i < 16; i++ ) { dc += src[-1 + i * FDEC_STRIDE]; dc += src[i - FDEC_STRIDE]; } vec_u8_u v ; v.s[0] = (( dc + 16 ) >> 5); vec_u8_t bc_v = vec_splat(v.v, 0); PREDICT_16x16_DC_ALTIVEC(bc_v); } static void predict_16x16_dc_left_altivec( uint8_t *src ) { uint32_t dc = 0; for( int i = 0; i < 16; i++ ) dc += src[-1 + i * FDEC_STRIDE]; vec_u8_u v ; v.s[0] = (( dc + 8 ) >> 4); vec_u8_t bc_v = vec_splat(v.v, 0); PREDICT_16x16_DC_ALTIVEC(bc_v); } static void predict_16x16_dc_top_altivec( uint8_t *src ) { uint32_t dc = 0; for( int i = 0; i < 16; i++ ) dc += src[i - FDEC_STRIDE]; vec_u8_u v ; v.s[0] = (( dc + 8 ) >> 4); vec_u8_t bc_v = vec_splat(v.v, 0); PREDICT_16x16_DC_ALTIVEC(bc_v); } static void predict_16x16_dc_128_altivec( uint8_t *src ) { /* test if generating the constant is faster than loading it. vector unsigned int bc_v = (vector unsigned int)CV(0x80808080, 0x80808080, 0x80808080, 0x80808080); */ vec_u8_t bc_v = vec_vslb((vec_u8_t)vec_splat_u8(1),(vec_u8_t)vec_splat_u8(7)); PREDICT_16x16_DC_ALTIVEC(bc_v); } static void predict_16x16_h_altivec( uint8_t *src ) { for( int i = 0; i < 16; i++ ) { vec_u8_t v = vec_ld(-1, src); vec_u8_t v_v = vec_splat(v, 15); vec_st(v_v, 0, src); src += FDEC_STRIDE; } } static void predict_16x16_v_altivec( uint8_t *src ) { vec_u32_u v; v.s[0] = *(uint32_t*)&src[ 0-FDEC_STRIDE]; v.s[1] = *(uint32_t*)&src[ 4-FDEC_STRIDE]; v.s[2] = *(uint32_t*)&src[ 8-FDEC_STRIDE]; v.s[3] = *(uint32_t*)&src[12-FDEC_STRIDE]; for( int i = 0; i < 16; i++ ) { vec_st(v.v, 0, (uint32_t*)src); src += FDEC_STRIDE; } } #endif // !HIGH_BIT_DEPTH /**************************************************************************** * Exported functions: ****************************************************************************/ void x264_predict_16x16_init_altivec( x264_predict_t pf[7] ) { #if !HIGH_BIT_DEPTH pf[I_PRED_16x16_V ] = predict_16x16_v_altivec; pf[I_PRED_16x16_H ] = predict_16x16_h_altivec; pf[I_PRED_16x16_DC] = predict_16x16_dc_altivec; pf[I_PRED_16x16_P ] = predict_16x16_p_altivec; pf[I_PRED_16x16_DC_LEFT] = predict_16x16_dc_left_altivec; pf[I_PRED_16x16_DC_TOP ] = predict_16x16_dc_top_altivec; pf[I_PRED_16x16_DC_128 ] = predict_16x16_dc_128_altivec; #endif // !HIGH_BIT_DEPTH } void x264_predict_8x8c_init_altivec( x264_predict_t pf[7] ) { #if !HIGH_BIT_DEPTH pf[I_PRED_CHROMA_P] = predict_8x8c_p_altivec; #endif // !HIGH_BIT_DEPTH }