fast deinterleaver (= il filter with stride/width/height tricks)

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@11243 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 100 insertions, 0 deletions

diff --git a/libmpcodecs/vf_fil.c b/libmpcodecs/vf_fil.c
new file mode 100644
index 0000000000..ec14635b88
--- /dev/null
+++ b/libmpcodecs/vf_fil.c
@@ -0,0 +1,100 @@
+#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 interleave;
+    int height;
+    int width;
+    int stridefactor;
+};
+
+//===========================================================================//
+
+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 pixel_stride= (width+15)&~15; //FIXME this is ust a guess ... especially for non planar its somewhat bad one
+
+#if 0
+    if(mpi->flags&MP_IMGFLAG_PLANAR)
+        pixel_stride= mpi->stride[0];
+    else
+        pixel_stride= 8*mpi->stride[0] / mpi->bpp;
+        
+#endif        
+    
+    if(vf->priv->interleave){
+        vf->priv->height= 2*height;
+        vf->priv->width= width - (pixel_stride/2);
+        vf->priv->stridefactor=1;
+    }else{
+        vf->priv->height= height/2;
+        vf->priv->width= width + pixel_stride;
+        vf->priv->stridefactor=4;
+    }
+//printf("hX %d %d %d\n", vf->priv->width,vf->priv->height,vf->priv->stridefactor);
+
+    return vf_next_config(vf, vf->priv->width, vf->priv->height,
+        (d_width*vf->priv->stridefactor)>>1, 2*d_height/vf->priv->stridefactor, flags, outfmt);
+}
+
+static int put_image(struct vf_instance_s* vf, mp_image_t *mpi){
+    if(mpi->flags&MP_IMGFLAG_DIRECT){
+	// we've used DR, so we're ready...
+	return vf_next_put_image(vf,(mp_image_t*)mpi->priv);
+    }
+
+    vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
+	MP_IMGTYPE_EXPORT, MP_IMGFLAG_ACCEPT_STRIDE,
+	vf->priv->width, vf->priv->height);
+    
+    // set up mpi as a double-stride image of dmpi:
+    vf->dmpi->planes[0]=mpi->planes[0];
+    vf->dmpi->stride[0]=(mpi->stride[0]*vf->priv->stridefactor)>>1;
+    if(vf->dmpi->flags&MP_IMGFLAG_PLANAR){
+        vf->dmpi->planes[1]=mpi->planes[1];
+	vf->dmpi->stride[1]=(mpi->stride[1]*vf->priv->stridefactor)>>1;
+        vf->dmpi->planes[2]=mpi->planes[2];
+	vf->dmpi->stride[2]=(mpi->stride[2]*vf->priv->stridefactor)>>1;
+    } else
+	vf->dmpi->planes[1]=mpi->planes[1]; // passthru bgr8 palette!!!
+    
+    return vf_next_put_image(vf,vf->dmpi);
+}
+
+//===========================================================================//
+
+static void uninit(struct vf_instance_s* vf)
+{
+	free(vf->priv);
+}
+
+static int open(vf_instance_t *vf, char* args){
+    vf->config=config;
+    vf->put_image=put_image;
+    vf->uninit=uninit;
+    vf->default_reqs=VFCAP_ACCEPT_STRIDE;
+    vf->priv=calloc(1, sizeof(struct vf_priv_s));
+    vf->priv->interleave= args && (*args == 'i');
+    return 1;
+}
+
+vf_info_t vf_info_fil = {
+    "fast (de)interleaver",
+    "fil",
+    "Michael Niedermayer",
+    "",
+    open,
+    NULL
+};
+
+//===========================================================================//