| 1 | /* |
| 2 | * AltiVec-enhanced yuv-to-yuv conversion routines. |
| 3 | * |
| 4 | * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org> |
| 5 | * based on the equivalent C code in swscale.c |
| 6 | * |
| 7 | * This file is part of FFmpeg. |
| 8 | * |
| 9 | * FFmpeg is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU Lesser General Public |
| 11 | * License as published by the Free Software Foundation; either |
| 12 | * version 2.1 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * FFmpeg is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with FFmpeg; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | */ |
| 23 | |
| 24 | #include <inttypes.h> |
| 25 | |
| 26 | #include "config.h" |
| 27 | #include "libavutil/attributes.h" |
| 28 | #include "libavutil/cpu.h" |
| 29 | #include "libswscale/swscale.h" |
| 30 | #include "libswscale/swscale_internal.h" |
| 31 | |
| 32 | #if HAVE_ALTIVEC |
| 33 | |
| 34 | static int yv12toyuy2_unscaled_altivec(SwsContext *c, const uint8_t *src[], |
| 35 | int srcStride[], int srcSliceY, |
| 36 | int srcSliceH, uint8_t *dstParam[], |
| 37 | int dstStride_a[]) |
| 38 | { |
| 39 | uint8_t *dst = dstParam[0] + dstStride_a[0] * srcSliceY; |
| 40 | // yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, |
| 41 | // srcStride[0], srcStride[1], dstStride[0]); |
| 42 | const uint8_t *ysrc = src[0]; |
| 43 | const uint8_t *usrc = src[1]; |
| 44 | const uint8_t *vsrc = src[2]; |
| 45 | const int width = c->srcW; |
| 46 | const int height = srcSliceH; |
| 47 | const int lumStride = srcStride[0]; |
| 48 | const int chromStride = srcStride[1]; |
| 49 | const int dstStride = dstStride_a[0]; |
| 50 | const vector unsigned char yperm = vec_lvsl(0, ysrc); |
| 51 | const int vertLumPerChroma = 2; |
| 52 | register unsigned int y; |
| 53 | |
| 54 | /* This code assumes: |
| 55 | * |
| 56 | * 1) dst is 16 bytes-aligned |
| 57 | * 2) dstStride is a multiple of 16 |
| 58 | * 3) width is a multiple of 16 |
| 59 | * 4) lum & chrom stride are multiples of 8 |
| 60 | */ |
| 61 | |
| 62 | for (y = 0; y < height; y++) { |
| 63 | int i; |
| 64 | for (i = 0; i < width - 31; i += 32) { |
| 65 | const unsigned int j = i >> 1; |
| 66 | vector unsigned char v_yA = vec_ld(i, ysrc); |
| 67 | vector unsigned char v_yB = vec_ld(i + 16, ysrc); |
| 68 | vector unsigned char v_yC = vec_ld(i + 32, ysrc); |
| 69 | vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm); |
| 70 | vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm); |
| 71 | vector unsigned char v_uA = vec_ld(j, usrc); |
| 72 | vector unsigned char v_uB = vec_ld(j + 16, usrc); |
| 73 | vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc)); |
| 74 | vector unsigned char v_vA = vec_ld(j, vsrc); |
| 75 | vector unsigned char v_vB = vec_ld(j + 16, vsrc); |
| 76 | vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc)); |
| 77 | vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); |
| 78 | vector unsigned char v_uv_b = vec_mergel(v_u, v_v); |
| 79 | vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a); |
| 80 | vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a); |
| 81 | vector unsigned char v_yuy2_2 = vec_mergeh(v_y2, v_uv_b); |
| 82 | vector unsigned char v_yuy2_3 = vec_mergel(v_y2, v_uv_b); |
| 83 | vec_st(v_yuy2_0, (i << 1), dst); |
| 84 | vec_st(v_yuy2_1, (i << 1) + 16, dst); |
| 85 | vec_st(v_yuy2_2, (i << 1) + 32, dst); |
| 86 | vec_st(v_yuy2_3, (i << 1) + 48, dst); |
| 87 | } |
| 88 | if (i < width) { |
| 89 | const unsigned int j = i >> 1; |
| 90 | vector unsigned char v_y1 = vec_ld(i, ysrc); |
| 91 | vector unsigned char v_u = vec_ld(j, usrc); |
| 92 | vector unsigned char v_v = vec_ld(j, vsrc); |
| 93 | vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); |
| 94 | vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a); |
| 95 | vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a); |
| 96 | vec_st(v_yuy2_0, (i << 1), dst); |
| 97 | vec_st(v_yuy2_1, (i << 1) + 16, dst); |
| 98 | } |
| 99 | if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) { |
| 100 | usrc += chromStride; |
| 101 | vsrc += chromStride; |
| 102 | } |
| 103 | ysrc += lumStride; |
| 104 | dst += dstStride; |
| 105 | } |
| 106 | |
| 107 | return srcSliceH; |
| 108 | } |
| 109 | |
| 110 | static int yv12touyvy_unscaled_altivec(SwsContext *c, const uint8_t *src[], |
| 111 | int srcStride[], int srcSliceY, |
| 112 | int srcSliceH, uint8_t *dstParam[], |
| 113 | int dstStride_a[]) |
| 114 | { |
| 115 | uint8_t *dst = dstParam[0] + dstStride_a[0] * srcSliceY; |
| 116 | // yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, |
| 117 | // srcStride[0], srcStride[1], dstStride[0]); |
| 118 | const uint8_t *ysrc = src[0]; |
| 119 | const uint8_t *usrc = src[1]; |
| 120 | const uint8_t *vsrc = src[2]; |
| 121 | const int width = c->srcW; |
| 122 | const int height = srcSliceH; |
| 123 | const int lumStride = srcStride[0]; |
| 124 | const int chromStride = srcStride[1]; |
| 125 | const int dstStride = dstStride_a[0]; |
| 126 | const int vertLumPerChroma = 2; |
| 127 | const vector unsigned char yperm = vec_lvsl(0, ysrc); |
| 128 | register unsigned int y; |
| 129 | |
| 130 | /* This code assumes: |
| 131 | * |
| 132 | * 1) dst is 16 bytes-aligned |
| 133 | * 2) dstStride is a multiple of 16 |
| 134 | * 3) width is a multiple of 16 |
| 135 | * 4) lum & chrom stride are multiples of 8 |
| 136 | */ |
| 137 | |
| 138 | for (y = 0; y < height; y++) { |
| 139 | int i; |
| 140 | for (i = 0; i < width - 31; i += 32) { |
| 141 | const unsigned int j = i >> 1; |
| 142 | vector unsigned char v_yA = vec_ld(i, ysrc); |
| 143 | vector unsigned char v_yB = vec_ld(i + 16, ysrc); |
| 144 | vector unsigned char v_yC = vec_ld(i + 32, ysrc); |
| 145 | vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm); |
| 146 | vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm); |
| 147 | vector unsigned char v_uA = vec_ld(j, usrc); |
| 148 | vector unsigned char v_uB = vec_ld(j + 16, usrc); |
| 149 | vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc)); |
| 150 | vector unsigned char v_vA = vec_ld(j, vsrc); |
| 151 | vector unsigned char v_vB = vec_ld(j + 16, vsrc); |
| 152 | vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc)); |
| 153 | vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); |
| 154 | vector unsigned char v_uv_b = vec_mergel(v_u, v_v); |
| 155 | vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1); |
| 156 | vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1); |
| 157 | vector unsigned char v_uyvy_2 = vec_mergeh(v_uv_b, v_y2); |
| 158 | vector unsigned char v_uyvy_3 = vec_mergel(v_uv_b, v_y2); |
| 159 | vec_st(v_uyvy_0, (i << 1), dst); |
| 160 | vec_st(v_uyvy_1, (i << 1) + 16, dst); |
| 161 | vec_st(v_uyvy_2, (i << 1) + 32, dst); |
| 162 | vec_st(v_uyvy_3, (i << 1) + 48, dst); |
| 163 | } |
| 164 | if (i < width) { |
| 165 | const unsigned int j = i >> 1; |
| 166 | vector unsigned char v_y1 = vec_ld(i, ysrc); |
| 167 | vector unsigned char v_u = vec_ld(j, usrc); |
| 168 | vector unsigned char v_v = vec_ld(j, vsrc); |
| 169 | vector unsigned char v_uv_a = vec_mergeh(v_u, v_v); |
| 170 | vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1); |
| 171 | vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1); |
| 172 | vec_st(v_uyvy_0, (i << 1), dst); |
| 173 | vec_st(v_uyvy_1, (i << 1) + 16, dst); |
| 174 | } |
| 175 | if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) { |
| 176 | usrc += chromStride; |
| 177 | vsrc += chromStride; |
| 178 | } |
| 179 | ysrc += lumStride; |
| 180 | dst += dstStride; |
| 181 | } |
| 182 | return srcSliceH; |
| 183 | } |
| 184 | |
| 185 | #endif /* HAVE_ALTIVEC */ |
| 186 | |
| 187 | av_cold void ff_get_unscaled_swscale_ppc(SwsContext *c) |
| 188 | { |
| 189 | #if HAVE_ALTIVEC |
| 190 | if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)) |
| 191 | return; |
| 192 | |
| 193 | if (!(c->srcW & 15) && !(c->flags & SWS_BITEXACT) && |
| 194 | c->srcFormat == AV_PIX_FMT_YUV420P) { |
| 195 | enum AVPixelFormat dstFormat = c->dstFormat; |
| 196 | |
| 197 | // unscaled YV12 -> packed YUV, we want speed |
| 198 | if (dstFormat == AV_PIX_FMT_YUYV422) |
| 199 | c->swscale = yv12toyuy2_unscaled_altivec; |
| 200 | else if (dstFormat == AV_PIX_FMT_UYVY422) |
| 201 | c->swscale = yv12touyvy_unscaled_altivec; |
| 202 | } |
| 203 | #endif /* HAVE_ALTIVEC */ |
| 204 | } |