/* * AltiVec-enhanced yuv2yuvX * * Copyright (C) 2004 Romain Dolbeau * based on the equivalent C code in swscale.c * * 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 "libavutil/attributes.h" #include "libavutil/mem_internal.h" static void FUNC(yuv2planeX_8_16)(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, const uint8_t *dither, int offset, int x) { register int i, j; LOCAL_ALIGNED(16, int, val, [16]); vector signed int vo1, vo2, vo3, vo4; vector unsigned short vs1, vs2; vector unsigned char vf; vector unsigned int altivec_vectorShiftInt19 = vec_add(vec_splat_u32(10), vec_splat_u32(9)); for (i = 0; i < 16; i++) val[i] = dither[(x + i + offset) & 7] << 12; vo1 = vec_ld(0, val); vo2 = vec_ld(16, val); vo3 = vec_ld(32, val); vo4 = vec_ld(48, val); for (j = 0; j < filterSize; j++) { unsigned int joffset=j<<1; unsigned int xoffset=x<<1; vector unsigned char av_unused perm; vector signed short l1,vLumFilter; LOAD_FILTER(vLumFilter,filter); vLumFilter = vec_splat(vLumFilter, 0); LOAD_L1(l1,src[j],perm); yuv2planeX_8(vo1, vo2, l1, src[j], x, perm, vLumFilter); yuv2planeX_8(vo3, vo4, l1, src[j], x + 8, perm, vLumFilter); } vo1 = vec_sra(vo1, altivec_vectorShiftInt19); vo2 = vec_sra(vo2, altivec_vectorShiftInt19); vo3 = vec_sra(vo3, altivec_vectorShiftInt19); vo4 = vec_sra(vo4, altivec_vectorShiftInt19); vs1 = vec_packsu(vo1, vo2); vs2 = vec_packsu(vo3, vo4); vf = vec_packsu(vs1, vs2); VEC_ST(vf, 0, dest); } static inline void yuv2planeX_u(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset, int x) { int i, j; for (i = x; i < dstW; i++) { int t = dither[(i + offset) & 7] << 12; for (j = 0; j < filterSize; j++) t += src[j][i] * filter[j]; dest[i] = av_clip_uint8(t >> 19); } } static void FUNC(yuv2planeX)(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset) { int dst_u = -(uintptr_t)dest & 15; int i; yuv2planeX_u(filter, filterSize, src, dest, dst_u, dither, offset, 0); for (i = dst_u; i < dstW - 15; i += 16) FUNC(yuv2planeX_8_16)(filter, filterSize, src, dest + i, dither, offset, i); yuv2planeX_u(filter, filterSize, src, dest, dstW, dither, offset, i); } static void FUNC(hScale_real)(SwsInternal *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize) { LOCAL_ALIGNED(16, int, tempo, [4]); switch (filterSize) { case 4: for (register int i = 0; i < dstW; i++) { register int srcPos = filterPos[i]; vector unsigned char src_vF = unaligned_load(srcPos, src); vector signed short src_v, filter_v; vector signed int val_vEven, val_s; src_v = // vec_unpackh sign-extends... (vector signed short)(VEC_MERGEH((vector unsigned char)vzero, src_vF)); // now put our elements in the even slots src_v = vec_mergeh(src_v, (vector signed short)vzero); GET_VF4(i, filter_v, filter); val_vEven = vec_mule(src_v, filter_v); val_s = vec_sums(val_vEven, vzero); vec_st(val_s, 0, tempo); dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1); } break; case 8: for (register int i = 0; i < dstW; i++) { register int srcPos = filterPos[i]; vector unsigned char src_vF, av_unused src_v0, av_unused src_v1; vector unsigned char av_unused permS; vector signed short src_v, filter_v; vector signed int val_v, val_s; FIRST_LOAD(src_v0, srcPos, src, permS); LOAD_SRCV8(srcPos, 0, src, permS, src_v0, src_v1, src_vF); src_v = // vec_unpackh sign-extends... (vector signed short)(VEC_MERGEH((vector unsigned char)vzero, src_vF)); filter_v = vec_ld(i << 4, filter); val_v = vec_msums(src_v, filter_v, (vector signed int)vzero); val_s = vec_sums(val_v, vzero); vec_st(val_s, 0, tempo); dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1); } break; case 16: for (register int i = 0; i < dstW; i++) { register int srcPos = filterPos[i]; vector unsigned char src_vF = unaligned_load(srcPos, src); vector signed short src_vA = // vec_unpackh sign-extends... (vector signed short)(VEC_MERGEH((vector unsigned char)vzero, src_vF)); vector signed short src_vB = // vec_unpackh sign-extends... (vector signed short)(VEC_MERGEL((vector unsigned char)vzero, src_vF)); vector signed short filter_v0 = vec_ld(i << 5, filter); vector signed short filter_v1 = vec_ld((i << 5) + 16, filter); vector signed int val_acc = vec_msums(src_vA, filter_v0, (vector signed int)vzero); vector signed int val_v = vec_msums(src_vB, filter_v1, val_acc); vector signed int val_s = vec_sums(val_v, vzero); VEC_ST(val_s, 0, tempo); dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1); } break; default: for (register int i = 0; i < dstW; i++) { register int j; register int srcPos = filterPos[i]; register int val = 0; for (j = 0; j < filterSize; j++) val += ((int)src[srcPos + j]) * filter[filterSize * i + j]; dst[i] = FFMIN(val >> 7, (1 << 15) - 1); } break; } }