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67adb30322
And preserve the public SwsContext as separate name. The motivation here is that I want to turn SwsContext into a public struct, while keeping the internal implementation hidden. Additionally, I also want to be able to use multiple internal implementations, e.g. for GPU devices. This commit does not include any functional changes. For the most part, it is a simple rename. The only complications arise from the public facing API functions, which preserve their current type (and hence require an additional unwrapping step internally), and the checkasm test framework, which directly accesses SwsInternal. For consistency, the affected functions that need to maintain a distionction have generally been changed to refer to the SwsContext as *sws, and the SwsInternal as *c. In an upcoming commit, I will provide a backing definition for the public SwsContext, and update `sws_internal()` to dereference the internal struct instead of merely casting it. Sponsored-by: Sovereign Tech Fund Signed-off-by: Niklas Haas <git@haasn.dev>
205 lines
8.6 KiB
C
205 lines
8.6 KiB
C
/*
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* AltiVec-enhanced yuv-to-yuv conversion routines.
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*
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* Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org>
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* based on the equivalent C code in swscale.c
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <inttypes.h>
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libswscale/swscale.h"
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#include "libswscale/swscale_internal.h"
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#if HAVE_ALTIVEC
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static int yv12toyuy2_unscaled_altivec(SwsInternal *c, const uint8_t *const src[],
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const int srcStride[], int srcSliceY,
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int srcSliceH, uint8_t *const dstParam[],
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const int dstStride_a[])
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{
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uint8_t *dst = dstParam[0] + dstStride_a[0] * srcSliceY;
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// yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH,
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// srcStride[0], srcStride[1], dstStride[0]);
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const uint8_t *ysrc = src[0];
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const uint8_t *usrc = src[1];
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const uint8_t *vsrc = src[2];
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const int width = c->srcW;
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const int height = srcSliceH;
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const int lumStride = srcStride[0];
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const int chromStride = srcStride[1];
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const int dstStride = dstStride_a[0];
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const vector unsigned char yperm = vec_lvsl(0, ysrc);
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const int vertLumPerChroma = 2;
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register unsigned int y;
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/* This code assumes:
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*
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* 1) dst is 16 bytes-aligned
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* 2) dstStride is a multiple of 16
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* 3) width is a multiple of 16
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* 4) lum & chrom stride are multiples of 8
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*/
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for (y = 0; y < height; y++) {
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int i;
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for (i = 0; i < width - 31; i += 32) {
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const unsigned int j = i >> 1;
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vector unsigned char v_yA = vec_ld(i, ysrc);
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vector unsigned char v_yB = vec_ld(i + 16, ysrc);
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vector unsigned char v_yC = vec_ld(i + 32, ysrc);
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vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm);
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vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm);
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vector unsigned char v_uA = vec_ld(j, usrc);
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vector unsigned char v_uB = vec_ld(j + 16, usrc);
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vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc));
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vector unsigned char v_vA = vec_ld(j, vsrc);
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vector unsigned char v_vB = vec_ld(j + 16, vsrc);
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vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc));
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vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
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vector unsigned char v_uv_b = vec_mergel(v_u, v_v);
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vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a);
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vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a);
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vector unsigned char v_yuy2_2 = vec_mergeh(v_y2, v_uv_b);
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vector unsigned char v_yuy2_3 = vec_mergel(v_y2, v_uv_b);
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vec_st(v_yuy2_0, (i << 1), dst);
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vec_st(v_yuy2_1, (i << 1) + 16, dst);
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vec_st(v_yuy2_2, (i << 1) + 32, dst);
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vec_st(v_yuy2_3, (i << 1) + 48, dst);
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}
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if (i < width) {
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const unsigned int j = i >> 1;
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vector unsigned char v_y1 = vec_ld(i, ysrc);
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vector unsigned char v_u = vec_ld(j, usrc);
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vector unsigned char v_v = vec_ld(j, vsrc);
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vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
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vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a);
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vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a);
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vec_st(v_yuy2_0, (i << 1), dst);
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vec_st(v_yuy2_1, (i << 1) + 16, dst);
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}
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if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) {
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usrc += chromStride;
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vsrc += chromStride;
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}
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ysrc += lumStride;
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dst += dstStride;
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}
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return srcSliceH;
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}
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static int yv12touyvy_unscaled_altivec(SwsInternal *c, const uint8_t *const src[],
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const int srcStride[], int srcSliceY,
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int srcSliceH, uint8_t *const dstParam[],
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const int dstStride_a[])
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{
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uint8_t *dst = dstParam[0] + dstStride_a[0] * srcSliceY;
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// yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH,
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// srcStride[0], srcStride[1], dstStride[0]);
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const uint8_t *ysrc = src[0];
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const uint8_t *usrc = src[1];
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const uint8_t *vsrc = src[2];
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const int width = c->srcW;
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const int height = srcSliceH;
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const int lumStride = srcStride[0];
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const int chromStride = srcStride[1];
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const int dstStride = dstStride_a[0];
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const int vertLumPerChroma = 2;
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const vector unsigned char yperm = vec_lvsl(0, ysrc);
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register unsigned int y;
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/* This code assumes:
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*
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* 1) dst is 16 bytes-aligned
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* 2) dstStride is a multiple of 16
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* 3) width is a multiple of 16
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* 4) lum & chrom stride are multiples of 8
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*/
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for (y = 0; y < height; y++) {
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int i;
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for (i = 0; i < width - 31; i += 32) {
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const unsigned int j = i >> 1;
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vector unsigned char v_yA = vec_ld(i, ysrc);
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vector unsigned char v_yB = vec_ld(i + 16, ysrc);
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vector unsigned char v_yC = vec_ld(i + 32, ysrc);
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vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm);
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vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm);
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vector unsigned char v_uA = vec_ld(j, usrc);
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vector unsigned char v_uB = vec_ld(j + 16, usrc);
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vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc));
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vector unsigned char v_vA = vec_ld(j, vsrc);
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vector unsigned char v_vB = vec_ld(j + 16, vsrc);
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vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc));
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vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
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vector unsigned char v_uv_b = vec_mergel(v_u, v_v);
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vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1);
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vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1);
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vector unsigned char v_uyvy_2 = vec_mergeh(v_uv_b, v_y2);
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vector unsigned char v_uyvy_3 = vec_mergel(v_uv_b, v_y2);
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vec_st(v_uyvy_0, (i << 1), dst);
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vec_st(v_uyvy_1, (i << 1) + 16, dst);
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vec_st(v_uyvy_2, (i << 1) + 32, dst);
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vec_st(v_uyvy_3, (i << 1) + 48, dst);
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}
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if (i < width) {
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const unsigned int j = i >> 1;
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vector unsigned char v_y1 = vec_ld(i, ysrc);
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vector unsigned char v_u = vec_ld(j, usrc);
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vector unsigned char v_v = vec_ld(j, vsrc);
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vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
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vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1);
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vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1);
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vec_st(v_uyvy_0, (i << 1), dst);
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vec_st(v_uyvy_1, (i << 1) + 16, dst);
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}
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if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) {
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usrc += chromStride;
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vsrc += chromStride;
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}
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ysrc += lumStride;
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dst += dstStride;
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}
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return srcSliceH;
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}
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#endif /* HAVE_ALTIVEC */
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av_cold void ff_get_unscaled_swscale_ppc(SwsInternal *c)
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{
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#if HAVE_ALTIVEC
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if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
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return;
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if (!(c->srcW & 15) && !(c->flags & SWS_BITEXACT) &&
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c->srcFormat == AV_PIX_FMT_YUV420P) {
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enum AVPixelFormat dstFormat = c->dstFormat;
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// unscaled YV12 -> packed YUV, we want speed
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if (dstFormat == AV_PIX_FMT_YUYV422)
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c->convert_unscaled = yv12toyuy2_unscaled_altivec;
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else if (dstFormat == AV_PIX_FMT_UYVY422)
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c->convert_unscaled = yv12touyvy_unscaled_altivec;
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}
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#endif /* HAVE_ALTIVEC */
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}
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