Libav 0.7.1
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00001 /* 00002 * AltiVec-enhanced yuv-to-yuv convertion routines. 00003 * 00004 * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org> 00005 * based on the equivalent C code in swscale.c 00006 * 00007 * This file is part of Libav. 00008 * 00009 * Libav is free software; you can redistribute it and/or 00010 * modify it under the terms of the GNU Lesser General Public 00011 * License as published by the Free Software Foundation; either 00012 * version 2.1 of the License, or (at your option) any later version. 00013 * 00014 * Libav is distributed in the hope that it will be useful, 00015 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00017 * Lesser General Public License for more details. 00018 * 00019 * You should have received a copy of the GNU Lesser General Public 00020 * License along with Libav; if not, write to the Free Software 00021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00022 */ 00023 00024 #include <inttypes.h> 00025 #include "config.h" 00026 #include "libswscale/swscale.h" 00027 #include "libswscale/swscale_internal.h" 00028 #include "libavutil/cpu.h" 00029 00030 static int yv12toyuy2_unscaled_altivec(SwsContext *c, const uint8_t* src[], 00031 int srcStride[], int srcSliceY, 00032 int srcSliceH, uint8_t* dstParam[], 00033 int dstStride_a[]) 00034 { 00035 uint8_t *dst=dstParam[0] + dstStride_a[0]*srcSliceY; 00036 // yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]); 00037 const uint8_t *ysrc = src[0]; 00038 const uint8_t *usrc = src[1]; 00039 const uint8_t *vsrc = src[2]; 00040 const int width = c->srcW; 00041 const int height = srcSliceH; 00042 const int lumStride = srcStride[0]; 00043 const int chromStride = srcStride[1]; 00044 const int dstStride = dstStride_a[0]; 00045 const vector unsigned char yperm = vec_lvsl(0, ysrc); 00046 const int vertLumPerChroma = 2; 00047 register unsigned int y; 00048 00049 /* This code assumes: 00050 00051 1) dst is 16 bytes-aligned 00052 2) dstStride is a multiple of 16 00053 3) width is a multiple of 16 00054 4) lum & chrom stride are multiples of 8 00055 */ 00056 00057 for (y=0; y<height; y++) { 00058 int i; 00059 for (i = 0; i < width - 31; i+= 32) { 00060 const unsigned int j = i >> 1; 00061 vector unsigned char v_yA = vec_ld(i, ysrc); 00062 vector unsigned char v_yB = vec_ld(i + 16, ysrc); 00063 vector unsigned char v_yC = vec_ld(i + 32, ysrc); 00064 vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm); 00065 vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm); 00066 vector unsigned char v_uA = vec_ld(j, usrc); 00067 vector unsigned char v_uB = vec_ld(j + 16, usrc); 00068 vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc)); 00069 vector unsigned char v_vA = vec_ld(j, vsrc); 00070 vector unsigned char v_vB = vec_ld(j + 16, vsrc); 00071 vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc)); 00072 vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); 00073 vector unsigned char v_uv_b = vec_mergel(v_u, v_v); 00074 vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a); 00075 vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a); 00076 vector unsigned char v_yuy2_2 = vec_mergeh(v_y2, v_uv_b); 00077 vector unsigned char v_yuy2_3 = vec_mergel(v_y2, v_uv_b); 00078 vec_st(v_yuy2_0, (i << 1), dst); 00079 vec_st(v_yuy2_1, (i << 1) + 16, dst); 00080 vec_st(v_yuy2_2, (i << 1) + 32, dst); 00081 vec_st(v_yuy2_3, (i << 1) + 48, dst); 00082 } 00083 if (i < width) { 00084 const unsigned int j = i >> 1; 00085 vector unsigned char v_y1 = vec_ld(i, ysrc); 00086 vector unsigned char v_u = vec_ld(j, usrc); 00087 vector unsigned char v_v = vec_ld(j, vsrc); 00088 vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); 00089 vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a); 00090 vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a); 00091 vec_st(v_yuy2_0, (i << 1), dst); 00092 vec_st(v_yuy2_1, (i << 1) + 16, dst); 00093 } 00094 if ((y&(vertLumPerChroma-1)) == vertLumPerChroma-1) { 00095 usrc += chromStride; 00096 vsrc += chromStride; 00097 } 00098 ysrc += lumStride; 00099 dst += dstStride; 00100 } 00101 00102 return srcSliceH; 00103 } 00104 00105 static int yv12touyvy_unscaled_altivec(SwsContext *c, const uint8_t* src[], 00106 int srcStride[], int srcSliceY, 00107 int srcSliceH, uint8_t* dstParam[], 00108 int dstStride_a[]) 00109 { 00110 uint8_t *dst=dstParam[0] + dstStride_a[0]*srcSliceY; 00111 // yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]); 00112 const uint8_t *ysrc = src[0]; 00113 const uint8_t *usrc = src[1]; 00114 const uint8_t *vsrc = src[2]; 00115 const int width = c->srcW; 00116 const int height = srcSliceH; 00117 const int lumStride = srcStride[0]; 00118 const int chromStride = srcStride[1]; 00119 const int dstStride = dstStride_a[0]; 00120 const int vertLumPerChroma = 2; 00121 const vector unsigned char yperm = vec_lvsl(0, ysrc); 00122 register unsigned int y; 00123 00124 /* This code assumes: 00125 00126 1) dst is 16 bytes-aligned 00127 2) dstStride is a multiple of 16 00128 3) width is a multiple of 16 00129 4) lum & chrom stride are multiples of 8 00130 */ 00131 00132 for (y=0; y<height; y++) { 00133 int i; 00134 for (i = 0; i < width - 31; i+= 32) { 00135 const unsigned int j = i >> 1; 00136 vector unsigned char v_yA = vec_ld(i, ysrc); 00137 vector unsigned char v_yB = vec_ld(i + 16, ysrc); 00138 vector unsigned char v_yC = vec_ld(i + 32, ysrc); 00139 vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm); 00140 vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm); 00141 vector unsigned char v_uA = vec_ld(j, usrc); 00142 vector unsigned char v_uB = vec_ld(j + 16, usrc); 00143 vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc)); 00144 vector unsigned char v_vA = vec_ld(j, vsrc); 00145 vector unsigned char v_vB = vec_ld(j + 16, vsrc); 00146 vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc)); 00147 vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); 00148 vector unsigned char v_uv_b = vec_mergel(v_u, v_v); 00149 vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1); 00150 vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1); 00151 vector unsigned char v_uyvy_2 = vec_mergeh(v_uv_b, v_y2); 00152 vector unsigned char v_uyvy_3 = vec_mergel(v_uv_b, v_y2); 00153 vec_st(v_uyvy_0, (i << 1), dst); 00154 vec_st(v_uyvy_1, (i << 1) + 16, dst); 00155 vec_st(v_uyvy_2, (i << 1) + 32, dst); 00156 vec_st(v_uyvy_3, (i << 1) + 48, dst); 00157 } 00158 if (i < width) { 00159 const unsigned int j = i >> 1; 00160 vector unsigned char v_y1 = vec_ld(i, ysrc); 00161 vector unsigned char v_u = vec_ld(j, usrc); 00162 vector unsigned char v_v = vec_ld(j, vsrc); 00163 vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); 00164 vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1); 00165 vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1); 00166 vec_st(v_uyvy_0, (i << 1), dst); 00167 vec_st(v_uyvy_1, (i << 1) + 16, dst); 00168 } 00169 if ((y&(vertLumPerChroma-1)) == vertLumPerChroma-1) { 00170 usrc += chromStride; 00171 vsrc += chromStride; 00172 } 00173 ysrc += lumStride; 00174 dst += dstStride; 00175 } 00176 return srcSliceH; 00177 } 00178 00179 void ff_swscale_get_unscaled_altivec(SwsContext *c) 00180 { 00181 if ((av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) && !(c->srcW & 15) && 00182 !(c->flags & SWS_BITEXACT) && c->srcFormat == PIX_FMT_YUV420P) { 00183 enum PixelFormat dstFormat = c->dstFormat; 00184 00185 // unscaled YV12 -> packed YUV, we want speed 00186 if (dstFormat == PIX_FMT_YUYV422) 00187 c->swScale= yv12toyuy2_unscaled_altivec; 00188 else if (dstFormat == PIX_FMT_UYVY422) 00189 c->swScale= yv12touyvy_unscaled_altivec; 00190 } 00191 }