/* * AltiVec-enhanced yuv2yuvX * * Copyright (C) 2004 Romain Dolbeau * based on the equivalent C code in swscale.c * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include "config.h" #include "libswscale/swscale.h" #include "libswscale/swscale_internal.h" #include "libavutil/attributes.h" #include "libavutil/cpu.h" #include "yuv2rgb_altivec.h" #include "libavutil/ppc/util_altivec.h" #if HAVE_ALTIVEC #define vzero vec_splat_s32(0) #if HAVE_BIGENDIAN #define GET_LS(a,b,c,s) {\ vector signed short l2 = vec_ld(((b) << 1) + 16, s);\ ls = vec_perm(a, l2, c);\ a = l2;\ } #else #define GET_LS(a,b,c,s) {\ ls = a;\ a = vec_vsx_ld(((b) << 1) + 16, s);\ } #endif #define yuv2planeX_8(d1, d2, l1, src, x, perm, filter) do {\ vector signed short ls;\ GET_LS(l1, x, perm, src);\ vector signed int i1 = vec_mule(filter, ls);\ vector signed int i2 = vec_mulo(filter, ls);\ vector signed int vf1, vf2;\ vf1 = vec_mergeh(i1, i2);\ vf2 = vec_mergel(i1, i2);\ d1 = vec_add(d1, vf1);\ d2 = vec_add(d2, vf2);\ } while (0) #if HAVE_BIGENDIAN #define LOAD_FILTER(vf,f) {\ vector unsigned char perm0 = vec_lvsl(joffset, f);\ vf = vec_ld(joffset, f);\ vf = vec_perm(vf, vf, perm0);\ } #define LOAD_L1(ll1,s,p){\ p = vec_lvsl(xoffset, s);\ ll1 = vec_ld(xoffset, s);\ } #else #define LOAD_FILTER(vf,f) {\ vf = vec_vsx_ld(joffset, f);\ } #define LOAD_L1(ll1,s,p){\ ll1 = vec_vsx_ld(xoffset, s);\ } #endif static void yuv2planeX_16_altivec(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 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 yuv2planeX_altivec(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) yuv2planeX_16_altivec(filter, filterSize, src, dest + i, dither, offset, i); yuv2planeX_u(filter, filterSize, src, dest, dstW, dither, offset, i); } #if HAVE_BIGENDIAN // The 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2). // The neat trick: We only care for half the elements, // high or low depending on (i<<3)%16 (it's 0 or 8 here), // and we're going to use vec_mule, so we choose // carefully how to "unpack" the elements into the even slots. #define GET_VF4(a, vf, f) {\ vf = vec_ld(a<< 3, f);\ if ((a << 3) % 16)\ vf = vec_mergel(vf, (vector signed short)vzero);\ else\ vf = vec_mergeh(vf, (vector signed short)vzero);\ } #define FIRST_LOAD(sv, pos, s, per) {\ sv = vec_ld(pos, s);\ per = vec_lvsl(pos, s);\ } #define UPDATE_PTR(s0, d0, s1, d1) {\ d0 = s0;\ d1 = s1;\ } #define LOAD_SRCV(pos, a, s, per, v0, v1, vf) {\ v1 = vec_ld(pos + a + 16, s);\ vf = vec_perm(v0, v1, per);\ } #define LOAD_SRCV8(pos, a, s, per, v0, v1, vf) {\ if ((((uintptr_t)s + pos) % 16) > 8) {\ v1 = vec_ld(pos + a + 16, s);\ }\ vf = vec_perm(v0, src_v1, per);\ } #define GET_VFD(a, b, f, vf0, vf1, per, vf, off) {\ vf1 = vec_ld((a * 2 * filterSize) + (b * 2) + 16 + off, f);\ vf = vec_perm(vf0, vf1, per);\ } #else /* else of #if HAVE_BIGENDIAN */ #define GET_VF4(a, vf, f) {\ vf = (vector signed short)vec_vsx_ld(a << 3, f);\ vf = vec_mergeh(vf, (vector signed short)vzero);\ } #define FIRST_LOAD(sv, pos, s, per) {} #define UPDATE_PTR(s0, d0, s1, d1) {} #define LOAD_SRCV(pos, a, s, per, v0, v1, vf) {\ vf = vec_vsx_ld(pos + a, s);\ } #define LOAD_SRCV8(pos, a, s, per, v0, v1, vf) LOAD_SRCV(pos, a, s, per, v0, v1, vf) #define GET_VFD(a, b, f, vf0, vf1, per, vf, off) {\ vf = vec_vsx_ld((a * 2 * filterSize) + (b * 2) + off, f);\ } #endif /* end of #if HAVE_BIGENDIAN */ static void hScale_altivec_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, src_v0, src_v1; vector unsigned char 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, offset = i * 2 * filterSize; register int srcPos = filterPos[i]; vector signed int val_s, val_v = (vector signed int)vzero; vector signed short filter_v0R; vector unsigned char permF, src_v0, 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 src_v1, src_vF; vector signed short filter_v1R, filter_v2R, filter_v0, filter_v1; LOAD_SRCV(srcPos, j, src, permS, src_v0, src_v1, src_vF); 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)); 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); vector signed int 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 src_v1, src_vF; vector signed short src_v, 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); } } } #endif /* HAVE_ALTIVEC */ av_cold void ff_sws_init_swscale_ppc(SwsContext *c) { #if HAVE_ALTIVEC enum AVPixelFormat dstFormat = c->dstFormat; if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)) return; if (c->srcBpc == 8 && c->dstBpc <= 14) { c->hyScale = c->hcScale = hScale_altivec_real; } if (!is16BPS(dstFormat) && !isNBPS(dstFormat) && dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 && !c->needAlpha) { c->yuv2planeX = yuv2planeX_altivec; } /* The following list of supported dstFormat values should * match what's found in the body of ff_yuv2packedX_altivec() */ if (!(c->flags & (SWS_BITEXACT | SWS_FULL_CHR_H_INT)) && !c->needAlpha) { switch (c->dstFormat) { case AV_PIX_FMT_ABGR: c->yuv2packedX = ff_yuv2abgr_X_altivec; break; case AV_PIX_FMT_BGRA: c->yuv2packedX = ff_yuv2bgra_X_altivec; break; case AV_PIX_FMT_ARGB: c->yuv2packedX = ff_yuv2argb_X_altivec; break; case AV_PIX_FMT_RGBA: c->yuv2packedX = ff_yuv2rgba_X_altivec; break; case AV_PIX_FMT_BGR24: c->yuv2packedX = ff_yuv2bgr24_X_altivec; break; case AV_PIX_FMT_RGB24: c->yuv2packedX = ff_yuv2rgb24_X_altivec; break; } } #endif /* HAVE_ALTIVEC */ }