/* * AltiVec-enhanced yuv-to-yuv conversion routines. * * 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 "libavutil/attributes.h" #include "libavutil/cpu.h" #include "libswscale/swscale.h" #include "libswscale/swscale_internal.h" #if HAVE_ALTIVEC static int yv12toyuy2_unscaled_altivec(SwsContext *c, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dstParam[], int dstStride_a[]) { uint8_t *dst = dstParam[0] + dstStride_a[0] * srcSliceY; // yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, // srcStride[0], srcStride[1], dstStride[0]); const uint8_t *ysrc = src[0]; const uint8_t *usrc = src[1]; const uint8_t *vsrc = src[2]; const int width = c->srcW; const int height = srcSliceH; const int lumStride = srcStride[0]; const int chromStride = srcStride[1]; const int dstStride = dstStride_a[0]; const vector unsigned char yperm = vec_lvsl(0, ysrc); const int vertLumPerChroma = 2; register unsigned int y; /* This code assumes: * * 1) dst is 16 bytes-aligned * 2) dstStride is a multiple of 16 * 3) width is a multiple of 16 * 4) lum & chrom stride are multiples of 8 */ for (y = 0; y < height; y++) { int i; for (i = 0; i < width - 31; i += 32) { const unsigned int j = i >> 1; vector unsigned char v_yA = vec_ld(i, ysrc); vector unsigned char v_yB = vec_ld(i + 16, ysrc); vector unsigned char v_yC = vec_ld(i + 32, ysrc); vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm); vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm); vector unsigned char v_uA = vec_ld(j, usrc); vector unsigned char v_uB = vec_ld(j + 16, usrc); vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc)); vector unsigned char v_vA = vec_ld(j, vsrc); vector unsigned char v_vB = vec_ld(j + 16, vsrc); vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc)); vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); vector unsigned char v_uv_b = vec_mergel(v_u, v_v); vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a); vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a); vector unsigned char v_yuy2_2 = vec_mergeh(v_y2, v_uv_b); vector unsigned char v_yuy2_3 = vec_mergel(v_y2, v_uv_b); vec_st(v_yuy2_0, (i << 1), dst); vec_st(v_yuy2_1, (i << 1) + 16, dst); vec_st(v_yuy2_2, (i << 1) + 32, dst); vec_st(v_yuy2_3, (i << 1) + 48, dst); } if (i < width) { const unsigned int j = i >> 1; vector unsigned char v_y1 = vec_ld(i, ysrc); vector unsigned char v_u = vec_ld(j, usrc); vector unsigned char v_v = vec_ld(j, vsrc); vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a); vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a); vec_st(v_yuy2_0, (i << 1), dst); vec_st(v_yuy2_1, (i << 1) + 16, dst); } if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) { usrc += chromStride; vsrc += chromStride; } ysrc += lumStride; dst += dstStride; } return srcSliceH; } static int yv12touyvy_unscaled_altivec(SwsContext *c, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dstParam[], int dstStride_a[]) { uint8_t *dst = dstParam[0] + dstStride_a[0] * srcSliceY; // yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, // srcStride[0], srcStride[1], dstStride[0]); const uint8_t *ysrc = src[0]; const uint8_t *usrc = src[1]; const uint8_t *vsrc = src[2]; const int width = c->srcW; const int height = srcSliceH; const int lumStride = srcStride[0]; const int chromStride = srcStride[1]; const int dstStride = dstStride_a[0]; const int vertLumPerChroma = 2; const vector unsigned char yperm = vec_lvsl(0, ysrc); register unsigned int y; /* This code assumes: * * 1) dst is 16 bytes-aligned * 2) dstStride is a multiple of 16 * 3) width is a multiple of 16 * 4) lum & chrom stride are multiples of 8 */ for (y = 0; y < height; y++) { int i; for (i = 0; i < width - 31; i += 32) { const unsigned int j = i >> 1; vector unsigned char v_yA = vec_ld(i, ysrc); vector unsigned char v_yB = vec_ld(i + 16, ysrc); vector unsigned char v_yC = vec_ld(i + 32, ysrc); vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm); vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm); vector unsigned char v_uA = vec_ld(j, usrc); vector unsigned char v_uB = vec_ld(j + 16, usrc); vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc)); vector unsigned char v_vA = vec_ld(j, vsrc); vector unsigned char v_vB = vec_ld(j + 16, vsrc); vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc)); vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); vector unsigned char v_uv_b = vec_mergel(v_u, v_v); vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1); vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1); vector unsigned char v_uyvy_2 = vec_mergeh(v_uv_b, v_y2); vector unsigned char v_uyvy_3 = vec_mergel(v_uv_b, v_y2); vec_st(v_uyvy_0, (i << 1), dst); vec_st(v_uyvy_1, (i << 1) + 16, dst); vec_st(v_uyvy_2, (i << 1) + 32, dst); vec_st(v_uyvy_3, (i << 1) + 48, dst); } if (i < width) { const unsigned int j = i >> 1; vector unsigned char v_y1 = vec_ld(i, ysrc); vector unsigned char v_u = vec_ld(j, usrc); vector unsigned char v_v = vec_ld(j, vsrc); vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1); vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1); vec_st(v_uyvy_0, (i << 1), dst); vec_st(v_uyvy_1, (i << 1) + 16, dst); } if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) { usrc += chromStride; vsrc += chromStride; } ysrc += lumStride; dst += dstStride; } return srcSliceH; } #endif /* HAVE_ALTIVEC */ av_cold void ff_get_unscaled_swscale_ppc(SwsContext *c) { #if HAVE_ALTIVEC if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)) return; if (!(c->srcW & 15) && !(c->flags & SWS_BITEXACT) && c->srcFormat == AV_PIX_FMT_YUV420P) { enum AVPixelFormat dstFormat = c->dstFormat; // unscaled YV12 -> packed YUV, we want speed if (dstFormat == AV_PIX_FMT_YUYV422) c->swscale = yv12toyuy2_unscaled_altivec; else if (dstFormat == AV_PIX_FMT_UYVY422) c->swscale = yv12touyvy_unscaled_altivec; } #endif /* HAVE_ALTIVEC */ }