swscale: split out unscaled altivec YUV converters in their own file.

1 files changed, 191 insertions, 0 deletions

diff --git a/libswscale/ppc/yuv2yuv_altivec.c b/libswscale/ppc/yuv2yuv_altivec.c
new file mode 100644
index 0000000000..4cd02ffe1d
--- /dev/null
+++ b/libswscale/ppc/yuv2yuv_altivec.c
@@ -0,0 +1,191 @@
+/*
+ * 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 Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; 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;
+    }
+}