From 588dd085f438f69eff45f727bc576615bdf7f27f Mon Sep 17 00:00:00 2001
From: arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Wed, 17 Apr 2002 19:05:14 +0000
Subject: mpi clear func

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5662 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libmpcodecs/vf.c | 52 +++++++++++++++++++++++++++++++++++++---------------
 libmpcodecs/vf.h |  1 +
 2 files changed, 38 insertions(+), 15 deletions(-)

diff --git a/libmpcodecs/vf.c b/libmpcodecs/vf.c
index 5455df4599..88d64cf935 100644
--- a/libmpcodecs/vf.c
+++ b/libmpcodecs/vf.c
@@ -39,9 +39,44 @@ static vf_info_t* filter_list[]={
 };
 
 //============================================================================
-
 // mpi stuff:
 
+void vf_mpi_clear(mp_image_t* mpi,int x0,int y0,int w,int h){
+    int y;
+    if(mpi->flags&MP_IMGFLAG_PLANAR){
+	if(x==0 && w==mpi->width){
+	    // full width clear:
+	    memset(mpi->planes[0]+mpi->stride[0]*y0,0,mpi->stride[0]*h);
+	    memset(mpi->planes[1]+mpi->stride[1]*(y0>>1),128,mpi->stride[1]*(h>>1));
+	    memset(mpi->planes[2]+mpi->stride[2]*(y0>>1),128,mpi->stride[2]*(h>>1));
+	    return;
+	}
+	for(y=y0;y<y0+h;y+=2){
+	    memset(mpi->planes[0]+x0+mpi->stride[0]*y,0,w);
+	    memset(mpi->planes[0]+x0+mpi->stride[0]*(y+1),0,w);
+	    memset(mpi->planes[1]+(x0>>1)+mpi->stride[1]*(y>>1),128,(w>>1));
+	    memset(mpi->planes[2]+(x0>>1)+mpi->stride[2]*(y>>1),128,(w>>1));
+	}
+    }
+    // packed:
+    for(y=y0;y<y0+h;y++){
+	unsigned char* dst=mpi->planes[0]+mpi->stride[0]*y+(mpi->bpp>>3)*x0;
+	if(mpi->flags&MP_IMGFLAG_YUV){
+	    unsigned int* p=dst;
+	    int size=(mpi->bpp>>3)*w/4;
+	    int i;
+	    if(mpi->flags&MP_IMGFLAG_SWAPPED){
+	        for(i=0;i<size;i+=4) p[i]=p[i+1]=p[i+2]=p[i+3]=0x00800080;
+		for(;i<size;i++) p[i]=0x00800080;
+	    } else {
+	        for(i=0;i<size;i+=4) p[i]=p[i+1]=p[i+2]=p[i+3]=0x80008000;
+		for(;i<size;i++) p[i]=0x80008000;
+	    }
+	} else
+	    memset(dst,0,(mpi->bpp>>3)*w);
+    }
+}
+
 mp_image_t* vf_get_image(vf_instance_t* vf, unsigned int outfmt, int mp_imgtype, int mp_imgflag, int w, int h){
   mp_image_t* mpi=NULL;
   int w2=w; //(mp_imgflag&MP_IMGFLAG_ACCEPT_STRIDE)?((w+15)&(~15)):w;
@@ -108,23 +143,10 @@ mp_image_t* vf_get_image(vf_instance_t* vf, unsigned int outfmt, int mp_imgtype,
 	          mpi->planes[2]=mpi->planes[0]+mpi->width*mpi->height;
 	          mpi->planes[1]=mpi->planes[2]+(mpi->width>>1)*(mpi->height>>1);
 	      }
-	      // clear!
-	      memset(mpi->planes[0],0,mpi->stride[0]*mpi->height);
-	      memset(mpi->planes[1],128,mpi->stride[1]*(mpi->height>>1));
-	      memset(mpi->planes[2],128,mpi->stride[2]*(mpi->height>>1));
 	  } else {
 	      if(!mpi->stride[0]) mpi->stride[0]=mpi->width*mpi->bpp/8;
-	      if(mpi->flags&MP_IMGFLAG_YUV){
-		  int size=mpi->bpp*mpi->width*mpi->height/8/4;
-		  unsigned int* p=mpi->planes[0];
-		  int i;
-		  if(mpi->flags&MP_IMGFLAG_SWAPPED)
-		      for(i=0;i<size;i+=4) p[i]=p[i+1]=p[i+2]=p[i+3]=0x00800080;
-		  else
-		      for(i=0;i<size;i+=4) p[i]=p[i+1]=p[i+2]=p[i+3]=0x80008000;
-	      } else
-	          memset(mpi->planes[0],0,mpi->bpp*mpi->width*mpi->height/8);
 	  }
+	  vf_mpi_clear(mpi,mpi->width,mpi->height);
 	  mpi->flags|=MP_IMGFLAG_ALLOCATED;
         }
     }
diff --git a/libmpcodecs/vf.h b/libmpcodecs/vf.h
index c4af334936..4b3013eacf 100644
--- a/libmpcodecs/vf.h
+++ b/libmpcodecs/vf.h
@@ -55,6 +55,7 @@ typedef struct vf_instance_s {
 #include "vfcap.h"
 
 // functions:
+void vf_mpi_clear(mp_image_t* mpi,int x0,int y0,int w,int h);
 mp_image_t* vf_get_image(vf_instance_t* vf, unsigned int outfmt, int mp_imgtype, int mp_imgflag, int w, int h);
 
 vf_instance_t* vf_open_plugin(vf_info_t** filter_list, vf_instance_t* next, char *name, char *args);
-- 
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