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- /*
- * AltiVec-enhanced yuv-to-yuv conversion 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 "libavutil/attributes.h"
- #include "libavutil/cpu.h"
- #include "libswscale/swscale.h"
- #include "libswscale/swscale_internal.h"
- #if HAVE_ALTIVEC
- static int yv12toyuy2_unscaled_altivec(SwsInternal *c, const uint8_t *const src[],
- const int srcStride[], int srcSliceY,
- int srcSliceH, uint8_t *const dstParam[],
- const 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(SwsInternal *c, const uint8_t *const src[],
- const int srcStride[], int srcSliceY,
- int srcSliceH, uint8_t *const dstParam[],
- const 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(SwsInternal *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->convert_unscaled = yv12toyuy2_unscaled_altivec;
- else if (dstFormat == AV_PIX_FMT_UYVY422)
- c->convert_unscaled = yv12touyvy_unscaled_altivec;
- }
- #endif /* HAVE_ALTIVEC */
- }
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