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, 91 insertions, 0 deletions

diff --git a/libmpcodecs/vf_crop.c b/libmpcodecs/vf_crop.c
new file mode 100644
index 0000000000..6808e9f492
--- /dev/null
+++ b/libmpcodecs/vf_crop.c
@@ -0,0 +1,91 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../config.h"
+#include "../mp_msg.h"
+
+#include "../mp_image.h"
+#include "vf.h"
+
+struct vf_priv_s {
+    int crop_w,crop_h;
+    int crop_x,crop_y;
+};
+
+//===========================================================================//
+
+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;
+    printf("crop->config() called\n");
+    // calculate the missing parameters:
+    if(vf->priv->crop_w<=0 || vf->priv->crop_w>width) vf->priv->crop_w=width;
+    if(vf->priv->crop_h<=0 || vf->priv->crop_h>height) vf->priv->crop_h=height;
+    if(vf->priv->crop_x<0) vf->priv->crop_x=(width-vf->priv->crop_w)/2;
+    if(vf->priv->crop_y<0) vf->priv->crop_y=(height-vf->priv->crop_h)/2;
+    // check:
+    if(vf->priv->crop_w+vf->priv->crop_x>width) return 0; // bad width
+    if(vf->priv->crop_h+vf->priv->crop_y>height) return 0; // bad height
+    ret=vf_next_config(vf,vf->priv->crop_w,vf->priv->crop_h,d_width,d_height,flags,outfmt);
+    printf("crop->config() return %d\n",ret);
+    return ret;
+}
+
+static void put_image(struct vf_instance_s* vf, mp_image_t *mpi){
+    mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
+	MP_IMGTYPE_EXPORT, 0,
+	vf->priv->crop_w, vf->priv->crop_h);
+    if(mpi->flags&MP_IMGFLAG_PLANAR){
+	dmpi->planes[0]=mpi->planes[0]+
+	    vf->priv->crop_y*mpi->stride[0]+vf->priv->crop_x;
+	dmpi->planes[1]=mpi->planes[1]+
+	    (vf->priv->crop_y>>1)*mpi->stride[1]+(vf->priv->crop_x>>1);
+	dmpi->planes[2]=mpi->planes[2]+
+	    (vf->priv->crop_y>>1)*mpi->stride[2]+(vf->priv->crop_x>>1);
+	dmpi->stride[0]=mpi->stride[0];
+	dmpi->stride[1]=mpi->stride[1];
+	dmpi->stride[2]=mpi->stride[2];
+    } else {
+	dmpi->planes[0]=mpi->planes[0]+
+	    vf->priv->crop_y*mpi->stride[0]+
+	    vf->priv->crop_x*(mpi->bpp/8);
+	dmpi->stride[0]=mpi->stride[0];
+    }
+    vf_next_put_image(vf,dmpi);
+}
+
+//===========================================================================//
+
+static int open(vf_instance_t *vf, char* args){
+    vf->config=config;
+    vf->put_image=put_image;
+    vf->priv=malloc(sizeof(struct vf_priv_s));
+    // TODO: parse args ->
+    vf->priv->crop_x=
+    vf->priv->crop_y=
+    vf->priv->crop_w=
+    vf->priv->crop_h=-1;
+    if(args) sscanf(args, "%d:%d:%d:%d", 
+    &vf->priv->crop_w,
+    &vf->priv->crop_h,
+    &vf->priv->crop_x,
+    &vf->priv->crop_y);
+    printf("Crop: %d x %d, %d ; %d\n",
+    vf->priv->crop_w,
+    vf->priv->crop_h,
+    vf->priv->crop_x,
+    vf->priv->crop_y);
+    return 1;
+}
+
+vf_info_t vf_info_crop = {
+    "cropping",
+    "crop",
+    "A'rpi",
+    "",
+    open
+};
+
+//===========================================================================//