[SCM] libav/experimental: Altivec unscaled YV12 -> packed YUV patch by (Romain Dolbeau <dolbeau at irisa dot fr>)
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:40:53 UTC 2013
The following commit has been merged in the experimental branch:
commit b71cf33c9b9bb500f625a5710c563f4884d1a696
Author: Romain Dolbeau <dolbeau at irisa.fr>
Date: Tue Jul 6 13:52:56 2004 +0000
Altivec unscaled YV12 -> packed YUV patch by (Romain Dolbeau <dolbeau at irisa dot fr>)
Originally committed as revision 12769 to svn://svn.mplayerhq.hu/mplayer/trunk/postproc
diff --git a/postproc/swscale.c b/postproc/swscale.c
index 67a75a9..8913521 100644
--- a/postproc/swscale.c
+++ b/postproc/swscale.c
@@ -1909,6 +1909,18 @@ SwsContext *sws_getContext(int srcW, int srcH, int origSrcFormat, int dstW, int
}
}
+#ifdef HAVE_ALTIVEC
+ if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&
+ ((srcFormat == IMGFMT_YV12 &&
+ (dstFormat == IMGFMT_YUY2 || dstFormat == IMGFMT_UYVY)))) {
+ // unscaled YV12 -> packed YUV, we want speed
+ if (dstFormat == IMGFMT_YUY2)
+ c->swScale= yv12toyuy2_unscaled_altivec;
+ else
+ c->swScale= yv12touyvy_unscaled_altivec;
+ }
+#endif
+
/* simple copy */
if( srcFormat == dstFormat
|| (isPlanarYUV(srcFormat) && isGray(dstFormat))
diff --git a/postproc/swscale_altivec_template.c b/postproc/swscale_altivec_template.c
index b1608d4..f5c7b96 100644
--- a/postproc/swscale_altivec_template.c
+++ b/postproc/swscale_altivec_template.c
@@ -383,3 +383,150 @@ static inline void hScale_altivec_real(int16_t *dst, int dstW, uint8_t *src, int
}
}
}
+
+static inline int yv12toyuy2_unscaled_altivec(SwsContext *c, 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] );
+ uint8_t *ysrc = src[0];
+ uint8_t *usrc = src[1];
+ 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 assume:
+
+ 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 multiple 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 inline int yv12touyvy_unscaled_altivec(SwsContext *c, 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] );
+ uint8_t *ysrc = src[0];
+ uint8_t *usrc = src[1];
+ 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 assume:
+
+ 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 multiple 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;
+}
--
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