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| /* | |
| * AltiVec-enhanced yuv2yuvX | |
| * | |
| * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org> | |
| * 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 | |
| */ | |
| 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)(SwsContext *c, int16_t *dst, int dstW, | |
| const uint8_t *src, const int16_t *filter, | |
| const int32_t *filterPos, int filterSize) | |
| { | |
| register int i; | |
| LOCAL_ALIGNED(16, int, tempo, [4]); | |
| if (filterSize % 4) { | |
| for (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); | |
| } | |
| } else | |
| switch (filterSize) { | |
| case 4: | |
| for (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 (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 (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 (i = 0; i < dstW; i++) { | |
| register int j, av_unused offset = i * 2 * filterSize; | |
| register int srcPos = filterPos[i]; | |
| vector signed int val_s, val_v = (vector signed int)vzero; | |
| vector signed short av_unused filter_v0R; | |
| vector unsigned char av_unused permF, av_unused src_v0, av_unused permS; | |
| FIRST_LOAD(filter_v0R, offset, filter, permF); | |
| FIRST_LOAD(src_v0, srcPos, src, permS); | |
| for (j = 0; j < filterSize - 15; j += 16) { | |
| vector unsigned char av_unused src_v1, src_vF; | |
| vector signed short av_unused filter_v1R, av_unused filter_v2R, | |
| filter_v0, filter_v1, src_vA, src_vB; | |
| vector signed int val_acc; | |
| LOAD_SRCV(srcPos, j, src, permS, src_v0, src_v1, src_vF); | |
| src_vA = // vec_unpackh sign-extends... | |
| (vector signed short)(VEC_MERGEH((vector unsigned char)vzero, src_vF)); | |
| src_vB = // vec_unpackh sign-extends... | |
| (vector signed short)(VEC_MERGEL((vector unsigned char)vzero, src_vF)); | |
| GET_VFD(i, j, filter, filter_v0R, filter_v1R, permF, filter_v0, 0); | |
| GET_VFD(i, j, filter, filter_v1R, filter_v2R, permF, filter_v1, 16); | |
| val_acc = vec_msums(src_vA, filter_v0, val_v); | |
| val_v = vec_msums(src_vB, filter_v1, val_acc); | |
| UPDATE_PTR(filter_v2R, filter_v0R, src_v1, src_v0); | |
| } | |
| if (j < filterSize - 7) { | |
| // loading src_v0 is useless, it's already done above | |
| vector unsigned char av_unused src_v1, src_vF; | |
| vector signed short src_v, av_unused filter_v1R, filter_v; | |
| LOAD_SRCV8(srcPos, j, 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)); | |
| GET_VFD(i, j, filter, filter_v0R, filter_v1R, permF, filter_v, 0); | |
| val_v = vec_msums(src_v, filter_v, val_v); | |
| } | |
| val_s = vec_sums(val_v, vzero); | |
| VEC_ST(val_s, 0, tempo); | |
| dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1); | |
| } | |
| } | |
| } | |