video filter layer - written from scratch, but inspired a lot by Fredrik Kuivinen's patch

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5508 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 137 insertions, 0 deletions

diff --git a/libmpcodecs/vf_expand.c b/libmpcodecs/vf_expand.c
new file mode 100644
index 0000000000..d0b1f6101a
--- /dev/null
+++ b/libmpcodecs/vf_expand.c
@@ -0,0 +1,137 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../config.h"
+#include "../mp_msg.h"
+
+#include "../mp_image.h"
+#include "vf.h"
+
+#include "../libvo/fastmemcpy.h"
+
+struct vf_priv_s {
+    int exp_w,exp_h;
+    int exp_x,exp_y;
+    mp_image_t *dmpi;
+};
+
+//===========================================================================//
+
+static int config(struct vf_instance_s* vf,
+        int width, int height, int d_width, int d_height,
+	unsigned int flags, unsigned int outfmt){
+    int ret;
+    // calculate the missing parameters:
+    if(vf->priv->exp_w<width) vf->priv->exp_w=width;
+    if(vf->priv->exp_h<height) vf->priv->exp_h=height;
+    if(vf->priv->exp_x<0) vf->priv->exp_x=(vf->priv->exp_w-width)/2;
+    if(vf->priv->exp_y<0) vf->priv->exp_y=(vf->priv->exp_h-height)/2;
+    // check:
+//    if(vf->priv->exp_w+vf->priv->exp_x>width) return 0; // bad width
+//    if(vf->priv->exp_h+vf->priv->exp_y>height) return 0; // bad height
+    ret=vf_next_config(vf,vf->priv->exp_w,vf->priv->exp_h,d_width,d_height,flags,outfmt);
+    return ret;
+}
+
+// there are 4 cases:
+// codec --DR--> expand --DR--> vo
+// codec --DR--> expand -copy-> vo
+// codec -copy-> expand --DR--> vo
+// codec -copy-> expand -copy-> vo (worst case)
+
+static void get_image(struct vf_instance_s* vf, mp_image_t *mpi){
+    if(vf->priv->exp_w==mpi->width ||
+       (mpi->flags&(MP_IMGFLAG_ACCEPT_STRIDE|MP_IMGFLAG_ACCEPT_WIDTH)) ){
+	// try full DR !
+	vf->priv->dmpi=vf_get_image(vf->next,mpi->imgfmt,
+	    mpi->type, mpi->flags, vf->priv->exp_w, vf->priv->exp_h);
+	// set up mpi as a cropped-down image of dmpi:
+	if(mpi->flags&MP_IMGFLAG_PLANAR){
+	    mpi->planes[0]=vf->priv->dmpi->planes[0]+
+		vf->priv->exp_y*vf->priv->dmpi->stride[0]+vf->priv->exp_x;
+	    mpi->planes[1]=vf->priv->dmpi->planes[1]+
+		(vf->priv->exp_y>>1)*vf->priv->dmpi->stride[1]+(vf->priv->exp_x>>1);
+	    mpi->planes[2]=vf->priv->dmpi->planes[2]+
+		(vf->priv->exp_y>>1)*vf->priv->dmpi->stride[2]+(vf->priv->exp_x>>1);
+	    mpi->stride[0]=vf->priv->dmpi->stride[0];
+	    mpi->stride[1]=vf->priv->dmpi->stride[1];
+	    mpi->stride[2]=vf->priv->dmpi->stride[2];
+	} else {
+	    mpi->planes[0]=vf->priv->dmpi->planes[0]+
+		vf->priv->exp_y*vf->priv->dmpi->stride[0]+
+		vf->priv->exp_x*(vf->priv->dmpi->bpp/8);
+	    mpi->stride[0]=vf->priv->dmpi->stride[0];
+	}
+	mpi->flags|=MP_IMGFLAG_DIRECT;
+    }
+}
+
+static void put_image(struct vf_instance_s* vf, mp_image_t *mpi){
+    if(mpi->flags&MP_IMGFLAG_DIRECT){
+	vf_next_put_image(vf,vf->priv->dmpi);
+	return; // we've used DR, so we're ready...
+    }
+
+    // hope we'll get DR buffer:
+    vf->priv->dmpi=vf_get_image(vf->next,mpi->imgfmt,
+	MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
+	vf->priv->exp_w, vf->priv->exp_h);
+    
+    // copy mpi->dmpi...
+    if(mpi->flags&MP_IMGFLAG_PLANAR){
+	memcpy_pic(vf->priv->dmpi->planes[0]+
+	        vf->priv->exp_y*vf->priv->dmpi->stride[0]+vf->priv->exp_x,
+		mpi->planes[0], mpi->w, mpi->h,
+		vf->priv->dmpi->stride[0],mpi->stride[0]);
+	memcpy_pic(vf->priv->dmpi->planes[1]+
+		(vf->priv->exp_y>>1)*vf->priv->dmpi->stride[1]+(vf->priv->exp_x>>1),
+		mpi->planes[1], mpi->w>>1, mpi->h>>1,
+		vf->priv->dmpi->stride[1],mpi->stride[1]);
+	memcpy_pic(vf->priv->dmpi->planes[2]+
+		(vf->priv->exp_y>>1)*vf->priv->dmpi->stride[2]+(vf->priv->exp_x>>1),
+		mpi->planes[2], mpi->w>>1, mpi->h>>1,
+		vf->priv->dmpi->stride[2],mpi->stride[2]);
+    } else {
+	memcpy_pic(vf->priv->dmpi->planes[0]+
+	        vf->priv->exp_y*vf->priv->dmpi->stride[0]+vf->priv->exp_x*(vf->priv->dmpi->bpp/8),
+		mpi->planes[0], mpi->w*(vf->priv->dmpi->bpp/8), mpi->h,
+		vf->priv->dmpi->stride[0],mpi->stride[0]);
+    }
+    vf_next_put_image(vf,vf->priv->dmpi);
+}
+
+//===========================================================================//
+
+static int open(vf_instance_t *vf, char* args){
+    vf->config=config;
+    vf->get_image=get_image;
+    vf->put_image=put_image;
+    vf->priv=malloc(sizeof(struct vf_priv_s));
+    // TODO: parse args ->
+    vf->priv->exp_x=
+    vf->priv->exp_y=
+    vf->priv->exp_w=
+    vf->priv->exp_h=-1;
+    if(args) sscanf(args, "%d:%d:%d:%d", 
+    &vf->priv->exp_w,
+    &vf->priv->exp_h,
+    &vf->priv->exp_x,
+    &vf->priv->exp_y);
+    printf("Expand: %d x %d, %d ; %d\n",
+    vf->priv->exp_w,
+    vf->priv->exp_h,
+    vf->priv->exp_x,
+    vf->priv->exp_y);
+    return 1;
+}
+
+vf_info_t vf_info_expand = {
+    "expanding",
+    "expand",
+    "A'rpi",
+    "",
+    open
+};
+
+//===========================================================================//