| /* |
| * AltiVec-enhanced yuv-to-yuv convertion routines. |
| * |
| * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org> |
| * 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 <inttypes.h> |
| #include "config.h" |
| #include "libswscale/swscale.h" |
| #include "libswscale/swscale_internal.h" |
| #include "libavutil/cpu.h" |
| |
| 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; |
| } |
| |
| void ff_swscale_get_unscaled_altivec(SwsContext *c) |
| { |
| if ((av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) && !(c->srcW & 15) && |
| !(c->flags & SWS_BITEXACT) && c->srcFormat == PIX_FMT_YUV420P) { |
| enum PixelFormat dstFormat = c->dstFormat; |
| |
| // unscaled YV12 -> packed YUV, we want speed |
| if (dstFormat == PIX_FMT_YUYV422) |
| c->swScale= yv12toyuy2_unscaled_altivec; |
| else if (dstFormat == PIX_FMT_UYVY422) |
| c->swScale= yv12touyvy_unscaled_altivec; |
| } |
| } |