/* * 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" #if HAVE_ALTIVEC #define vzero vec_splat_s32(0) #define yuv2planeX_8(d1, d2, l1, src, x, perm, filter) do { \ vector signed short l2 = vec_ld(((x) << 1) + 16, src); \ vector signed short ls = vec_perm(l1, l2, perm); \ vector signed int i1 = vec_mule(filter, ls); \ vector signed int i2 = vec_mulo(filter, ls); \ vector signed int vf1 = vec_mergeh(i1, i2); \ vector signed int vf2 = vec_mergel(i1, i2); \ d1 = vec_add(d1, vf1); \ d2 = vec_add(d2, vf2); \ l1 = l2; \ } while (0) 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; DECLARE_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++) { 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(x << 1, src[j]); l1 = vec_ld(x << 1, src[j]); 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); } 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); } } } #endif /* HAVE_ALTIVEC */ av_cold void ff_sws_init_swscale_ppc(SwsContext *c) { #if HAVE_ALTIVEC && HAVE_BIGENDIAN enum AVPixelFormat 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 != AV_PIX_FMT_NV12 && dstFormat != AV_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 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 */ }