mirror of https://git.ffmpeg.org/ffmpeg.git
204 lines
7.6 KiB
C
204 lines
7.6 KiB
C
/*
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AltiVec-enhanced yuv2yuvX
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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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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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static const vector unsigned int altivec_vectorShiftInt19 = {19, 19, 19, 19};
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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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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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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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vector unsigned char perm1 = vec_lvsl(i << 2, val);
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vector signed int 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 vLumFilter = vec_ld(j << 1, lumFilter);
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vector unsigned char 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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vector unsigned char perm = vec_lvsl(0, lumSrc[j]);
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vector signed short 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 vChrFilter = vec_ld(j << 1, chrFilter);
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vector unsigned char 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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vector unsigned char perm = vec_lvsl(0, chrSrc[j]);
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vector signed short l1 = vec_ld(0, chrSrc[j]);
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vector signed short 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];
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}
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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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