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ffmpeg / libswscale / swscale_altivec_template.c @ 41415d28

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1 e50bc5a4 Alan Curry
/*
2 d026b45e Diego Biurrun
 * AltiVec-enhanced yuv2yuvX
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 *
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 * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org>
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 * based on the equivalent C code in "postproc/swscale.c"
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with FFmpeg; if not, write to the Free Software
21 b19bcbaa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifdef CONFIG_DARWIN
25 0d56feac Michael Niedermayer
#define AVV(x...) (x)
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#else
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#define AVV(x...) {x}
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#endif
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#define vzero vec_splat_s32(0)
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static inline void
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altivec_packIntArrayToCharArray(int *val, uint8_t* dest, int dstW) {
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    register int i;
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    vector unsigned int altivec_vectorShiftInt19 =
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        vec_add(vec_splat_u32(10),vec_splat_u32(9));
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    if ((unsigned long)dest % 16) {
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        /* badly aligned store, we force store alignement */
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        /* and will handle load misalignement on val w/ vec_perm */
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        vector unsigned char perm1;
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        vector signed int v1;
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        for (i = 0 ; (i < dstW) &&
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            (((unsigned long)dest + i) % 16) ; i++) {
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                int t = val[i] >> 19;
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                dest[i] = (t < 0) ? 0 : ((t > 255) ? 255 : t);
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        }
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        perm1 = vec_lvsl(i << 2, val);
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        v1 = vec_ld(i << 2, val);
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        for ( ; i < (dstW - 15); i+=16) {
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            int offset = i << 2;
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            vector signed int v2 = vec_ld(offset + 16, val);
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            vector signed int v3 = vec_ld(offset + 32, val);
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            vector signed int v4 = vec_ld(offset + 48, val);
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            vector signed int v5 = vec_ld(offset + 64, val);
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            vector signed int v12 = vec_perm(v1,v2,perm1);
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            vector signed int v23 = vec_perm(v2,v3,perm1);
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            vector signed int v34 = vec_perm(v3,v4,perm1);
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            vector signed int v45 = vec_perm(v4,v5,perm1);
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            vector signed int vA = vec_sra(v12, altivec_vectorShiftInt19);
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            vector signed int vB = vec_sra(v23, altivec_vectorShiftInt19);
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            vector signed int vC = vec_sra(v34, altivec_vectorShiftInt19);
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            vector signed int vD = vec_sra(v45, altivec_vectorShiftInt19);
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            vector unsigned short vs1 = vec_packsu(vA, vB);
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            vector unsigned short vs2 = vec_packsu(vC, vD);
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            vector unsigned char vf = vec_packsu(vs1, vs2);
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            vec_st(vf, i, dest);
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            v1 = v5;
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        }
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    } else { // dest is properly aligned, great
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        for (i = 0; i < (dstW - 15); i+=16) {
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            int offset = i << 2;
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            vector signed int v1 = vec_ld(offset, val);
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            vector signed int v2 = vec_ld(offset + 16, val);
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            vector signed int v3 = vec_ld(offset + 32, val);
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            vector signed int v4 = vec_ld(offset + 48, val);
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            vector signed int v5 = vec_sra(v1, altivec_vectorShiftInt19);
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            vector signed int v6 = vec_sra(v2, altivec_vectorShiftInt19);
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            vector signed int v7 = vec_sra(v3, altivec_vectorShiftInt19);
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            vector signed int v8 = vec_sra(v4, altivec_vectorShiftInt19);
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            vector unsigned short vs1 = vec_packsu(v5, v6);
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            vector unsigned short vs2 = vec_packsu(v7, v8);
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            vector unsigned char vf = vec_packsu(vs1, vs2);
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            vec_st(vf, i, dest);
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        }
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    }
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    for ( ; i < dstW ; i++) {
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        int t = val[i] >> 19;
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        dest[i] = (t < 0) ? 0 : ((t > 255) ? 255 : t);
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    }
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}
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static inline void
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yuv2yuvX_altivec_real(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
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                      int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
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                      uint8_t *dest, uint8_t *uDest, uint8_t *vDest, int dstW, int chrDstW)
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{
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    const vector signed int vini = {(1 << 18), (1 << 18), (1 << 18), (1 << 18)};
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    register int i, j;
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    {
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        int __attribute__ ((aligned (16))) val[dstW];
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        for (i = 0; i < (dstW -7); i+=4) {
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            vec_st(vini, i << 2, val);
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        }
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        for (; i < dstW; i++) {
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            val[i] = (1 << 18);
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        }
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        for (j = 0; j < lumFilterSize; j++) {
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            vector signed short l1, vLumFilter = vec_ld(j << 1, lumFilter);
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            vector unsigned char perm, perm0 = vec_lvsl(j << 1, lumFilter);
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            vLumFilter = vec_perm(vLumFilter, vLumFilter, perm0);
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            vLumFilter = vec_splat(vLumFilter, 0); // lumFilter[j] is loaded 8 times in vLumFilter
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            perm = vec_lvsl(0, lumSrc[j]);
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            l1 = vec_ld(0, lumSrc[j]);
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            for (i = 0; i < (dstW - 7); i+=8) {
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                int offset = i << 2;
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                vector signed short l2 = vec_ld((i << 1) + 16, lumSrc[j]);
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                vector signed int v1 = vec_ld(offset, val);
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                vector signed int v2 = vec_ld(offset + 16, val);
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                vector signed short ls = vec_perm(l1, l2, perm); // lumSrc[j][i] ... lumSrc[j][i+7]
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                vector signed int i1 = vec_mule(vLumFilter, ls);
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                vector signed int i2 = vec_mulo(vLumFilter, ls);
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                vector signed int vf1 = vec_mergeh(i1, i2);
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                vector signed int vf2 = vec_mergel(i1, i2); // lumSrc[j][i] * lumFilter[j] ... lumSrc[j][i+7] * lumFilter[j]
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                vector signed int vo1 = vec_add(v1, vf1);
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                vector signed int vo2 = vec_add(v2, vf2);
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                vec_st(vo1, offset, val);
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                vec_st(vo2, offset + 16, val);
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                l1 = l2;
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            }
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            for ( ; i < dstW; i++) {
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                val[i] += lumSrc[j][i] * lumFilter[j];
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            }
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        }
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        altivec_packIntArrayToCharArray(val,dest,dstW);
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    }
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    if (uDest != 0) {
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        int  __attribute__ ((aligned (16))) u[chrDstW];
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        int  __attribute__ ((aligned (16))) v[chrDstW];
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        for (i = 0; i < (chrDstW -7); i+=4) {
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            vec_st(vini, i << 2, u);
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            vec_st(vini, i << 2, v);
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        }
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        for (; i < chrDstW; i++) {
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            u[i] = (1 << 18);
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            v[i] = (1 << 18);
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        }
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        for (j = 0; j < chrFilterSize; j++) {
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            vector signed short l1, l1_V, vChrFilter = vec_ld(j << 1, chrFilter);
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            vector unsigned char perm, perm0 = vec_lvsl(j << 1, chrFilter);
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            vChrFilter = vec_perm(vChrFilter, vChrFilter, perm0);
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            vChrFilter = vec_splat(vChrFilter, 0); // chrFilter[j] is loaded 8 times in vChrFilter
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            perm = vec_lvsl(0, chrSrc[j]);
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            l1 = vec_ld(0, chrSrc[j]);
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            l1_V = vec_ld(2048 << 1, chrSrc[j]);
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            for (i = 0; i < (chrDstW - 7); i+=8) {
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                int offset = i << 2;
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                vector signed short l2 = vec_ld((i << 1) + 16, chrSrc[j]);
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                vector signed short l2_V = vec_ld(((i + 2048) << 1) + 16, chrSrc[j]);
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                vector signed int v1 = vec_ld(offset, u);
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                vector signed int v2 = vec_ld(offset + 16, u);
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                vector signed int v1_V = vec_ld(offset, v);
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                vector signed int v2_V = vec_ld(offset + 16, v);
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                vector signed short ls = vec_perm(l1, l2, perm); // chrSrc[j][i] ... chrSrc[j][i+7]
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                vector signed short ls_V = vec_perm(l1_V, l2_V, perm); // chrSrc[j][i+2048] ... chrSrc[j][i+2055]
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                vector signed int i1 = vec_mule(vChrFilter, ls);
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                vector signed int i2 = vec_mulo(vChrFilter, ls);
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                vector signed int i1_V = vec_mule(vChrFilter, ls_V);
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                vector signed int i2_V = vec_mulo(vChrFilter, ls_V);
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                vector signed int vf1 = vec_mergeh(i1, i2);
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                vector signed int vf2 = vec_mergel(i1, i2); // chrSrc[j][i] * chrFilter[j] ... chrSrc[j][i+7] * chrFilter[j]
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                vector signed int vf1_V = vec_mergeh(i1_V, i2_V);
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                vector signed int vf2_V = vec_mergel(i1_V, i2_V); // chrSrc[j][i] * chrFilter[j] ... chrSrc[j][i+7] * chrFilter[j]
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                vector signed int vo1 = vec_add(v1, vf1);
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                vector signed int vo2 = vec_add(v2, vf2);
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                vector signed int vo1_V = vec_add(v1_V, vf1_V);
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                vector signed int vo2_V = vec_add(v2_V, vf2_V);
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                vec_st(vo1, offset, u);
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                vec_st(vo2, offset + 16, u);
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                vec_st(vo1_V, offset, v);
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                vec_st(vo2_V, offset + 16, v);
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                l1 = l2;
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                l1_V = l2_V;
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            }
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            for ( ; i < chrDstW; i++) {
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                u[i] += chrSrc[j][i] * chrFilter[j];
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                v[i] += chrSrc[j][i + 2048] * chrFilter[j];
210
            }
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        }
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        altivec_packIntArrayToCharArray(u,uDest,chrDstW);
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        altivec_packIntArrayToCharArray(v,vDest,chrDstW);
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    }
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}
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217
static inline void hScale_altivec_real(int16_t *dst, int dstW, uint8_t *src, int srcW, int xInc, int16_t *filter, int16_t *filterPos, int filterSize) {
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    register int i;
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    int __attribute__ ((aligned (16))) tempo[4];
220
221
    if (filterSize % 4) {
222
        for (i=0; i<dstW; i++) {
223
            register int j;
224
            register int srcPos = filterPos[i];
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            register int val = 0;
226
            for (j=0; j<filterSize; j++) {
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                val += ((int)src[srcPos + j])*filter[filterSize*i + j];
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            }
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            dst[i] = av_clip(val>>7, 0, (1<<15)-1);
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        }
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    }
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    else
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    switch (filterSize) {
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    case 4:
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    {
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    for (i=0; i<dstW; i++) {
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        register int srcPos = filterPos[i];
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        vector unsigned char src_v0 = vec_ld(srcPos, src);
240
        vector unsigned char src_v1, src_vF;
241
        vector signed short src_v, filter_v;
242
        vector signed int val_vEven, val_s;
243
        if ((((int)src + srcPos)% 16) > 12) {
244
            src_v1 = vec_ld(srcPos + 16, src);
245
        }
246
        src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
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248
        src_v = // vec_unpackh sign-extends...
249
            (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
250
        // now put our elements in the even slots
251
        src_v = vec_mergeh(src_v, (vector signed short)vzero);
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        filter_v = vec_ld(i << 3, filter);
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        // the 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2)
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256
        // the neat trick : we only care for half the elements,
257
        // high or low depending on (i<<3)%16 (it's 0 or 8 here),
258
        // and we're going to use vec_mule, so we chose
259
        // carefully how to "unpack" the elements into the even slots
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        if ((i << 3) % 16)
261
            filter_v = vec_mergel(filter_v,(vector signed short)vzero);
262
        else
263
            filter_v = vec_mergeh(filter_v,(vector signed short)vzero);
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265
        val_vEven = vec_mule(src_v, filter_v);
266
        val_s = vec_sums(val_vEven, vzero);
267
        vec_st(val_s, 0, tempo);
268
        dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)-1);
269
    }
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    }
271
    break;
272
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    case 8:
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    {
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    for (i=0; i<dstW; i++) {
276
        register int srcPos = filterPos[i];
277
278
        vector unsigned char src_v0 = vec_ld(srcPos, src);
279
        vector unsigned char src_v1, src_vF;
280
        vector signed short src_v, filter_v;
281
        vector signed int val_v, val_s;
282
        if ((((int)src + srcPos)% 16) > 8) {
283
            src_v1 = vec_ld(srcPos + 16, src);
284
        }
285
        src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
286
287
        src_v = // vec_unpackh sign-extends...
288
            (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
289
        filter_v = vec_ld(i << 4, filter);
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        // the 4 above is 3 (filterSize == 8) + 1 (sizeof(short) == 2)
291
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        val_v = vec_msums(src_v, filter_v, (vector signed int)vzero);
293
        val_s = vec_sums(val_v, vzero);
294
        vec_st(val_s, 0, tempo);
295
        dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)-1);
296
    }
297 8c266f0c Romain Dolbeau
    }
298
    break;
299
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    case 16:
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    {
302 6e42e6c4 Diego Biurrun
        for (i=0; i<dstW; i++) {
303
            register int srcPos = filterPos[i];
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            vector unsigned char src_v0 = vec_ld(srcPos, src);
306
            vector unsigned char src_v1 = vec_ld(srcPos + 16, src);
307
            vector unsigned char src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
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            vector signed short src_vA = // vec_unpackh sign-extends...
310
                (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
311
            vector signed short src_vB = // vec_unpackh sign-extends...
312
                (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF));
313 8c266f0c Romain Dolbeau
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            vector signed short filter_v0 = vec_ld(i << 5, filter);
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            vector signed short filter_v1 = vec_ld((i << 5) + 16, filter);
316
            // the 5 above are 4 (filterSize == 16) + 1 (sizeof(short) == 2)
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            vector signed int val_acc = vec_msums(src_vA, filter_v0, (vector signed int)vzero);
319
            vector signed int val_v = vec_msums(src_vB, filter_v1, val_acc);
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            vector signed int val_s = vec_sums(val_v, vzero);
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            vec_st(val_s, 0, tempo);
324
            dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)-1);
325
        }
326 8c266f0c Romain Dolbeau
    }
327
    break;
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    default:
330 8c266f0c Romain Dolbeau
    {
331 6e42e6c4 Diego Biurrun
    for (i=0; i<dstW; i++) {
332
        register int j;
333
        register int srcPos = filterPos[i];
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        vector signed int val_s, val_v = (vector signed int)vzero;
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        vector signed short filter_v0R = vec_ld(i * 2 * filterSize, filter);
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        vector unsigned char permF = vec_lvsl((i * 2 * filterSize), filter);
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        vector unsigned char src_v0 = vec_ld(srcPos, src);
340
        vector unsigned char permS = vec_lvsl(srcPos, src);
341
342
        for (j = 0 ; j < filterSize - 15; j += 16) {
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            vector unsigned char src_v1 = vec_ld(srcPos + j + 16, src);
344
            vector unsigned char src_vF = vec_perm(src_v0, src_v1, permS);
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            vector signed short src_vA = // vec_unpackh sign-extends...
347
                (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
348
            vector signed short src_vB = // vec_unpackh sign-extends...
349
                (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF));
350 6a4970ab Diego Biurrun
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            vector signed short filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter);
352
            vector signed short filter_v2R = vec_ld((i * 2 * filterSize) + (j * 2) + 32, filter);
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            vector signed short filter_v0  = vec_perm(filter_v0R, filter_v1R, permF);
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            vector signed short filter_v1  = vec_perm(filter_v1R, filter_v2R, permF);
355 6a4970ab Diego Biurrun
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            vector signed int val_acc = vec_msums(src_vA, filter_v0, val_v);
357
            val_v = vec_msums(src_vB, filter_v1, val_acc);
358 8c266f0c Romain Dolbeau
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            filter_v0R = filter_v2R;
360
            src_v0 = src_v1;
361 8c266f0c Romain Dolbeau
        }
362
363
        if (j < (filterSize-7)) {
364 6e42e6c4 Diego Biurrun
            // loading src_v0 is useless, it's already done above
365
            //vector unsigned char src_v0 = vec_ld(srcPos + j, src);
366
            vector unsigned char src_v1, src_vF;
367
            vector signed short src_v, filter_v1R, filter_v;
368
            if ((((int)src + srcPos)% 16) > 8) {
369
                src_v1 = vec_ld(srcPos + j + 16, src);
370
            }
371
            src_vF = vec_perm(src_v0, src_v1, permS);
372
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            src_v = // vec_unpackh sign-extends...
374
                (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
375
            // loading filter_v0R is useless, it's already done above
376
            //vector signed short filter_v0R = vec_ld((i * 2 * filterSize) + j, filter);
377
            filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter);
378
            filter_v = vec_perm(filter_v0R, filter_v1R, permF);
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380
            val_v = vec_msums(src_v, filter_v, val_v);
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        }
382
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        val_s = vec_sums(val_v, vzero);
384 6a4970ab Diego Biurrun
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        vec_st(val_s, 0, tempo);
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        dst[i] = av_clip(tempo[3]>>7, 0, (1<<15)-1);
387 6e42e6c4 Diego Biurrun
    }
388 6a4970ab Diego Biurrun
389 8c266f0c Romain Dolbeau
    }
390 6e42e6c4 Diego Biurrun
    }
391 8c266f0c Romain Dolbeau
}
392 b71cf33c Romain Dolbeau
393
static inline int yv12toyuy2_unscaled_altivec(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
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                                              int srcSliceH, uint8_t* dstParam[], int dstStride_a[]) {
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    uint8_t *dst=dstParam[0] + dstStride_a[0]*srcSliceY;
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    // yv12toyuy2( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );
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    uint8_t *ysrc = src[0];
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    uint8_t *usrc = src[1];
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    uint8_t *vsrc = src[2];
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    const int width = c->srcW;
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    const int height = srcSliceH;
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    const int lumStride = srcStride[0];
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    const int chromStride = srcStride[1];
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    const int dstStride = dstStride_a[0];
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    const vector unsigned char yperm = vec_lvsl(0, ysrc);
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    const int vertLumPerChroma = 2;
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    register unsigned int y;
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    if (width&15) {
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        yv12toyuy2( ysrc, usrc, vsrc, dst,c->srcW,srcSliceH, lumStride, chromStride, dstStride);
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        return srcSliceH;
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    }
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    /* this code assume:
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    1) dst is 16 bytes-aligned
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    2) dstStride is a multiple of 16
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    3) width is a multiple of 16
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    4) lum&chrom stride are multiple of 8
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    */
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    for (y=0; y<height; y++) {
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        int i;
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        for (i = 0; i < width - 31; i+= 32) {
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            const unsigned int j = i >> 1;
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            vector unsigned char v_yA = vec_ld(i, ysrc);
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            vector unsigned char v_yB = vec_ld(i + 16, ysrc);
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            vector unsigned char v_yC = vec_ld(i + 32, ysrc);
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            vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm);
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            vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm);
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            vector unsigned char v_uA = vec_ld(j, usrc);
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            vector unsigned char v_uB = vec_ld(j + 16, usrc);
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            vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc));
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            vector unsigned char v_vA = vec_ld(j, vsrc);
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            vector unsigned char v_vB = vec_ld(j + 16, vsrc);
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            vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc));
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            vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
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            vector unsigned char v_uv_b = vec_mergel(v_u, v_v);
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            vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a);
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            vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a);
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            vector unsigned char v_yuy2_2 = vec_mergeh(v_y2, v_uv_b);
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            vector unsigned char v_yuy2_3 = vec_mergel(v_y2, v_uv_b);
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            vec_st(v_yuy2_0, (i << 1), dst);
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            vec_st(v_yuy2_1, (i << 1) + 16, dst);
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            vec_st(v_yuy2_2, (i << 1) + 32, dst);
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            vec_st(v_yuy2_3, (i << 1) + 48, dst);
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        }
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        if (i < width) {
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            const unsigned int j = i >> 1;
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            vector unsigned char v_y1 = vec_ld(i, ysrc);
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            vector unsigned char v_u = vec_ld(j, usrc);
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            vector unsigned char v_v = vec_ld(j, vsrc);
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            vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
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            vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a);
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            vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a);
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            vec_st(v_yuy2_0, (i << 1), dst);
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            vec_st(v_yuy2_1, (i << 1) + 16, dst);
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        }
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        if ( (y&(vertLumPerChroma-1))==(vertLumPerChroma-1) ) {
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            usrc += chromStride;
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            vsrc += chromStride;
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        }
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        ysrc += lumStride;
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        dst += dstStride;
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    }
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    return srcSliceH;
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}
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static inline int yv12touyvy_unscaled_altivec(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
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                                              int srcSliceH, uint8_t* dstParam[], int dstStride_a[]) {
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    uint8_t *dst=dstParam[0] + dstStride_a[0]*srcSliceY;
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    // yv12toyuy2( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );
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    uint8_t *ysrc = src[0];
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    uint8_t *usrc = src[1];
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    uint8_t *vsrc = src[2];
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    const int width = c->srcW;
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    const int height = srcSliceH;
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    const int lumStride = srcStride[0];
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    const int chromStride = srcStride[1];
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    const int dstStride = dstStride_a[0];
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    const int vertLumPerChroma = 2;
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    const vector unsigned char yperm = vec_lvsl(0, ysrc);
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    register unsigned int y;
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    if (width&15) {
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        yv12touyvy( ysrc, usrc, vsrc, dst,c->srcW,srcSliceH, lumStride, chromStride, dstStride);
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        return srcSliceH;
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    }
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    /* this code assume:
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    1) dst is 16 bytes-aligned
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    2) dstStride is a multiple of 16
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    3) width is a multiple of 16
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    4) lum&chrom stride are multiple of 8
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    */
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    for (y=0; y<height; y++) {
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        int i;
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        for (i = 0; i < width - 31; i+= 32) {
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            const unsigned int j = i >> 1;
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            vector unsigned char v_yA = vec_ld(i, ysrc);
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            vector unsigned char v_yB = vec_ld(i + 16, ysrc);
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            vector unsigned char v_yC = vec_ld(i + 32, ysrc);
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            vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm);
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            vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm);
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            vector unsigned char v_uA = vec_ld(j, usrc);
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            vector unsigned char v_uB = vec_ld(j + 16, usrc);
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            vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc));
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            vector unsigned char v_vA = vec_ld(j, vsrc);
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            vector unsigned char v_vB = vec_ld(j + 16, vsrc);
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            vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc));
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            vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
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            vector unsigned char v_uv_b = vec_mergel(v_u, v_v);
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            vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1);
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            vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1);
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            vector unsigned char v_uyvy_2 = vec_mergeh(v_uv_b, v_y2);
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            vector unsigned char v_uyvy_3 = vec_mergel(v_uv_b, v_y2);
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            vec_st(v_uyvy_0, (i << 1), dst);
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            vec_st(v_uyvy_1, (i << 1) + 16, dst);
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            vec_st(v_uyvy_2, (i << 1) + 32, dst);
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            vec_st(v_uyvy_3, (i << 1) + 48, dst);
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        }
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        if (i < width) {
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            const unsigned int j = i >> 1;
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            vector unsigned char v_y1 = vec_ld(i, ysrc);
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            vector unsigned char v_u = vec_ld(j, usrc);
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            vector unsigned char v_v = vec_ld(j, vsrc);
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            vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
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            vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1);
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            vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1);
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            vec_st(v_uyvy_0, (i << 1), dst);
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            vec_st(v_uyvy_1, (i << 1) + 16, dst);
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        }
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        if ( (y&(vertLumPerChroma-1))==(vertLumPerChroma-1) ) {
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            usrc += chromStride;
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            vsrc += chromStride;
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        }
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        ysrc += lumStride;
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        dst += dstStride;
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    }
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    return srcSliceH;
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}