/* * AltiVec-enhanced yuv2yuvX * * Copyright (C) 2004 Romain Dolbeau * based on the equivalent C code in swscale.c * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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" #define vzero vec_splat_s32(0) static inline void altivec_packIntArrayToCharArray(int *val, uint8_t *dest, int dstW) { register int i; vector unsigned int altivec_vectorShiftInt19 = vec_add(vec_splat_u32(10), vec_splat_u32(9)); if ((uintptr_t)dest % 16) { /* badly aligned store, we force store alignment */ /* and will handle load misalignment on val w/ vec_perm */ vector unsigned char perm1; vector signed int v1; for (i = 0; (i < dstW) && (((uintptr_t)dest + i) % 16); i++) { int t = val[i] >> 19; dest[i] = (t < 0) ? 0 : ((t > 255) ? 255 : t); } perm1 = vec_lvsl(i << 2, val); v1 = vec_ld(i << 2, val); for (; i < (dstW - 15); i += 16) { int offset = i << 2; vector signed int v2 = vec_ld(offset + 16, val); vector signed int v3 = vec_ld(offset + 32, val); vector signed int v4 = vec_ld(offset + 48, val); vector signed int v5 = vec_ld(offset + 64, val); vector signed int v12 = vec_perm(v1, v2, perm1); vector signed int v23 = vec_perm(v2, v3, perm1); vector signed int v34 = vec_perm(v3, v4, perm1); vector signed int v45 = vec_perm(v4, v5, perm1); vector signed int vA = vec_sra(v12, altivec_vectorShiftInt19); vector signed int vB = vec_sra(v23, altivec_vectorShiftInt19); vector signed int vC = vec_sra(v34, altivec_vectorShiftInt19); vector signed int vD = vec_sra(v45, altivec_vectorShiftInt19); vector unsigned short vs1 = vec_packsu(vA, vB); vector unsigned short vs2 = vec_packsu(vC, vD); vector unsigned char vf = vec_packsu(vs1, vs2); vec_st(vf, i, dest); v1 = v5; } } else { // dest is properly aligned, great for (i = 0; i < (dstW - 15); i += 16) { int offset = i << 2; vector signed int v1 = vec_ld(offset, val); vector signed int v2 = vec_ld(offset + 16, val); vector signed int v3 = vec_ld(offset + 32, val); vector signed int v4 = vec_ld(offset + 48, val); vector signed int v5 = vec_sra(v1, altivec_vectorShiftInt19); vector signed int v6 = vec_sra(v2, altivec_vectorShiftInt19); vector signed int v7 = vec_sra(v3, altivec_vectorShiftInt19); vector signed int v8 = vec_sra(v4, altivec_vectorShiftInt19); vector unsigned short vs1 = vec_packsu(v5, v6); vector unsigned short vs2 = vec_packsu(v7, v8); vector unsigned char vf = vec_packsu(vs1, vs2); vec_st(vf, i, dest); } } for (; i < dstW; i++) { int t = val[i] >> 19; dest[i] = (t < 0) ? 0 : ((t > 255) ? 255 : t); } } // FIXME remove the usage of scratch buffers. 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) { register int i, j; DECLARE_ALIGNED(16, int, val)[dstW]; for (i = 0; i < dstW; i++) val[i] = dither[(i + offset) & 7] << 12; for (j = 0; j < filterSize; j++) { vector signed short l1, vLumFilter = vec_ld(j << 1, filter); vector unsigned char perm, perm0 = vec_lvsl(j << 1, filter); vLumFilter = vec_perm(vLumFilter, vLumFilter, perm0); vLumFilter = vec_splat(vLumFilter, 0); // lumFilter[j] is loaded 8 times in vLumFilter perm = vec_lvsl(0, src[j]); l1 = vec_ld(0, src[j]); for (i = 0; i < (dstW - 7); i += 8) { int offset = i << 2; vector signed short l2 = vec_ld((i << 1) + 16, src[j]); vector signed int v1 = vec_ld(offset, val); vector signed int v2 = vec_ld(offset + 16, val); vector signed short ls = vec_perm(l1, l2, perm); // lumSrc[j][i] ... lumSrc[j][i+7] vector signed int i1 = vec_mule(vLumFilter, ls); vector signed int i2 = vec_mulo(vLumFilter, ls); vector signed int vf1 = vec_mergeh(i1, i2); vector signed int vf2 = vec_mergel(i1, i2); // lumSrc[j][i] * lumFilter[j] ... lumSrc[j][i+7] * lumFilter[j] vector signed int vo1 = vec_add(v1, vf1); vector signed int vo2 = vec_add(v2, vf2); vec_st(vo1, offset, val); vec_st(vo2, offset + 16, val); l1 = l2; } for (; i < dstW; i++) val[i] += src[j][i] * filter[j]; } altivec_packIntArrayToCharArray(val, dest, dstW); } 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; DECLARE_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_v0 = vec_ld(srcPos, src); vector unsigned char src_v1, src_vF; vector signed short src_v, filter_v; vector signed int val_vEven, val_s; if ((((uintptr_t)src + srcPos) % 16) > 12) { src_v1 = vec_ld(srcPos + 16, src); } src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); 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); filter_v = vec_ld(i << 3, filter); // 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. if ((i << 3) % 16) filter_v = vec_mergel(filter_v, (vector signed short)vzero); else filter_v = vec_mergeh(filter_v, (vector signed short)vzero); 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_v0 = vec_ld(srcPos, src); vector unsigned char src_v1, src_vF; vector signed short src_v, filter_v; vector signed int val_v, val_s; if ((((uintptr_t)src + srcPos) % 16) > 8) { src_v1 = vec_ld(srcPos + 16, src); } src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src)); src_v = // vec_unpackh sign-extends... (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); filter_v = vec_ld(i << 4, filter); // the 4 above is 3 (filterSize == 8) + 1 (sizeof(short) == 2) 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_v0 = vec_ld(srcPos, src); vector unsigned char src_v1 = vec_ld(srcPos + 16, src); vector unsigned char src_vF = vec_perm(src_v0, src_v1, vec_lvsl(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); // the 5 above are 4 (filterSize == 16) + 1 (sizeof(short) == 2) 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; register int srcPos = filterPos[i]; vector signed int val_s, val_v = (vector signed int)vzero; vector signed short filter_v0R = vec_ld(i * 2 * filterSize, filter); vector unsigned char permF = vec_lvsl((i * 2 * filterSize), filter); vector unsigned char src_v0 = vec_ld(srcPos, src); vector unsigned char permS = vec_lvsl(srcPos, src); for (j = 0; j < filterSize - 15; j += 16) { vector unsigned char src_v1 = vec_ld(srcPos + j + 16, src); vector unsigned char src_vF = vec_perm(src_v0, src_v1, permS); 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_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter); vector signed short filter_v2R = vec_ld((i * 2 * filterSize) + (j * 2) + 32, filter); vector signed short filter_v0 = vec_perm(filter_v0R, filter_v1R, permF); vector signed short filter_v1 = vec_perm(filter_v1R, filter_v2R, permF); vector signed int val_acc = vec_msums(src_vA, filter_v0, val_v); val_v = vec_msums(src_vB, filter_v1, val_acc); filter_v0R = filter_v2R; src_v0 = src_v1; } if (j < filterSize - 7) { // loading src_v0 is useless, it's already done above // vector unsigned char src_v0 = vec_ld(srcPos + j, src); vector unsigned char src_v1, src_vF; vector signed short src_v, filter_v1R, filter_v; if ((((uintptr_t)src + srcPos) % 16) > 8) { src_v1 = vec_ld(srcPos + j + 16, src); } src_vF = vec_perm(src_v0, src_v1, permS); src_v = // vec_unpackh sign-extends... (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF)); // loading filter_v0R is useless, it's already done above // vector signed short filter_v0R = vec_ld((i * 2 * filterSize) + j, filter); filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter); filter_v = vec_perm(filter_v0R, filter_v1R, permF); 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); } } } av_cold void ff_sws_init_swScale_altivec(SwsContext *c) { enum PixelFormat dstFormat = c->dstFormat; if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)) return; if (c->srcBpc == 8 && c->dstBpc <= 10) { c->hyScale = c->hcScale = hScale_altivec_real; } if (!is16BPS(dstFormat) && !is9_OR_10BPS(dstFormat) && dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21 && !c->alpPixBuf) { 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->alpPixBuf) { switch (c->dstFormat) { case PIX_FMT_ABGR: c->yuv2packedX = ff_yuv2abgr_X_altivec; break; case PIX_FMT_BGRA: c->yuv2packedX = ff_yuv2bgra_X_altivec; break; case PIX_FMT_ARGB: c->yuv2packedX = ff_yuv2argb_X_altivec; break; case PIX_FMT_RGBA: c->yuv2packedX = ff_yuv2rgba_X_altivec; break; case PIX_FMT_BGR24: c->yuv2packedX = ff_yuv2bgr24_X_altivec; break; case PIX_FMT_RGB24: c->yuv2packedX = ff_yuv2rgb24_X_altivec; break; } } }