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387 lines
14 KiB
387 lines
14 KiB
/* |
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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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#ifdef CONFIG_DARWIN |
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static const vector signed int vzero = |
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(vector signed int)(0, 0, 0, 0); |
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static const vector unsigned int altivec_vectorShiftInt19 = |
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(vector unsigned int)(19, 19, 19, 19); |
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#else |
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static const vector signed int vzero = |
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(vector signed int){0,0,0,0}; |
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static const vector unsigned int altivec_vectorShiftInt19 = |
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(vector unsigned int){19, 19, 19, 19}; |
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#endif |
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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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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]; |
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if (filterSize % 4) { |
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for(i=0; i<dstW; i++) { |
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register int j; |
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register int srcPos = filterPos[i]; |
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register int val = 0; |
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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] = MIN(MAX(0, val>>7), (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 j; |
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register int srcPos = filterPos[i]; |
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vector unsigned char src_v0 = vec_ld(srcPos, src); |
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vector unsigned char src_v1; |
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if ((((int)src + srcPos)% 16) > 12) { |
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src_v1 = vec_ld(srcPos + 16, src); |
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} |
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vector unsigned char src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); |
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vector signed short src_v = // vec_unpackh sign-extends... |
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(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); |
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// now put our elements in the even slots |
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src_v = vec_mergeh(src_v, (vector signed short)vzero); |
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vector signed short 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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// the neat trick : we only care for half the elements, |
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// high or low depending on (i<<3)%16 (it's 0 or 8 here), |
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// and we're going to use vec_mule, so we chose |
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// carefully how to "unpack" the elements into the even slots |
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if ((i << 3) % 16) |
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filter_v = vec_mergel(filter_v,(vector signed short)vzero); |
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else |
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filter_v = vec_mergeh(filter_v,(vector signed short)vzero); |
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vector signed int val_vEven = vec_mule(src_v, filter_v); |
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vector signed int val_s = vec_sums(val_vEven, vzero); |
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vec_st(val_s, 0, tempo); |
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dst[i] = MIN(MAX(0, tempo[3]>>7), (1<<15)-1); |
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} |
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} |
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break; |
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case 8: |
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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); |
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vector unsigned char src_v1; |
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if ((((int)src + srcPos)% 16) > 8) { |
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src_v1 = vec_ld(srcPos + 16, src); |
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} |
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vector unsigned char src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); |
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vector signed short src_v = // vec_unpackh sign-extends... |
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(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); |
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vector signed short filter_v = vec_ld(i << 4, filter); |
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// the 4 above is 3 (filterSize == 8) + 1 (sizeof(short) == 2) |
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vector signed int val_v = vec_msums(src_v, filter_v, (vector signed int)vzero); |
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vector signed int val_s = vec_sums(val_v, vzero); |
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vec_st(val_s, 0, tempo); |
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dst[i] = MIN(MAX(0, tempo[3]>>7), (1<<15)-1); |
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} |
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} |
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break; |
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case 16: |
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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); |
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vector unsigned char src_v1 = vec_ld(srcPos + 16, src); |
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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... |
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(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); |
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vector signed short src_vB = // vec_unpackh sign-extends... |
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(vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF)); |
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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); |
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// 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); |
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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); |
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dst[i] = MIN(MAX(0, tempo[3]>>7), (1<<15)-1); |
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} |
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} |
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break; |
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default: |
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{ |
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for(i=0; i<dstW; i++) { |
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register int j; |
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register int srcPos = filterPos[i]; |
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vector signed int 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); |
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vector unsigned char permS = vec_lvsl(srcPos, src); |
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for (j = 0 ; j < filterSize - 15; j += 16) { |
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vector unsigned char src_v1 = vec_ld(srcPos + j + 16, src); |
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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... |
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(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); |
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vector signed short src_vB = // vec_unpackh sign-extends... |
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(vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF)); |
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vector signed short filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter); |
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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); |
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vector signed int val_acc = vec_msums(src_vA, filter_v0, val_v); |
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val_v = vec_msums(src_vB, filter_v1, val_acc); |
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filter_v0R = filter_v2R; |
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src_v0 = src_v1; |
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} |
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if (j < (filterSize-7)) { |
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// loading src_v0 is useless, it's already done above |
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//vector unsigned char src_v0 = vec_ld(srcPos + j, src); |
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vector unsigned char src_v1; |
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if ((((int)src + srcPos)% 16) > 8) { |
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src_v1 = vec_ld(srcPos + j + 16, src); |
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} |
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vector unsigned char src_vF = vec_perm(src_v0, src_v1, permS); |
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vector signed short src_v = // vec_unpackh sign-extends... |
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(vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); |
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// loading filter_v0R is useless, it's already done above |
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//vector signed short filter_v0R = vec_ld((i * 2 * filterSize) + j, filter); |
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vector signed short filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter); |
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vector signed short filter_v = vec_perm(filter_v0R, filter_v1R, permF); |
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val_v = vec_msums(src_v, filter_v, val_v); |
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} |
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vector signed int val_s = vec_sums(val_v, vzero); |
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vec_st(val_s, 0, tempo); |
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dst[i] = MIN(MAX(0, tempo[3]>>7), (1<<15)-1); |
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} |
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} |
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} |
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}
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