Add MPlayers libmpcodecs, this will be needed for our libavfilter wraper for it.

1 files changed, 197 insertions, 0 deletions

diff --git a/libavfilter/libmpcodecs/vf_geq.c b/libavfilter/libmpcodecs/vf_geq.c
new file mode 100644
index 0000000000..ffbb42c331
--- /dev/null
+++ b/libavfilter/libmpcodecs/vf_geq.c
@@ -0,0 +1,197 @@
+/*
+ * Copyright (C) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <inttypes.h>
+
+#include "config.h"
+
+#include "mp_msg.h"
+#include "cpudetect.h"
+
+#include "img_format.h"
+#include "mp_image.h"
+#include "vf.h"
+
+#include "libavcodec/avcodec.h"
+#include "libavutil/eval.h"
+
+struct vf_priv_s {
+    AVExpr * e[3];
+    int framenum;
+    mp_image_t *mpi;
+};
+
+static int config(struct vf_instance *vf,
+        int width, int height, int d_width, int d_height,
+        unsigned int flags, unsigned int outfmt){
+    return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
+}
+
+static inline double getpix(struct vf_instance *vf, double x, double y, int plane){
+    int xi, yi;
+    mp_image_t *mpi= vf->priv->mpi;
+    int stride= mpi->stride[plane];
+    uint8_t *src=  mpi->planes[plane];
+    xi=x= FFMIN(FFMAX(x, 0), (mpi->w >> (plane ? mpi->chroma_x_shift : 0))-1);
+    yi=y= FFMIN(FFMAX(y, 0), (mpi->h >> (plane ? mpi->chroma_y_shift : 0))-1);
+
+    x-=xi;
+    y-=yi;
+
+    return
+     (1-y)*((1-x)*src[xi +  yi    * stride] + x*src[xi + 1 +  yi    * stride])
+    +   y *((1-x)*src[xi + (yi+1) * stride] + x*src[xi + 1 + (yi+1) * stride]);
+}
+
+//FIXME cubic interpolate
+//FIXME keep the last few frames
+static double lum(void *vf, double x, double y){
+    return getpix(vf, x, y, 0);
+}
+
+static double cb(void *vf, double x, double y){
+    return getpix(vf, x, y, 1);
+}
+
+static double cr(void *vf, double x, double y){
+    return getpix(vf, x, y, 2);
+}
+
+static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
+    mp_image_t *dmpi;
+    int x,y, plane;
+
+    if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
+        // no DR, so get a new image! hope we'll get DR buffer:
+        vf->dmpi=vf_get_image(vf->next,mpi->imgfmt, MP_IMGTYPE_TEMP,
+                              MP_IMGFLAG_ACCEPT_STRIDE|MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
+                              mpi->w,mpi->h);
+    }
+
+    dmpi= vf->dmpi;
+    vf->priv->mpi= mpi;
+
+    vf_clone_mpi_attributes(dmpi, mpi);
+
+    for(plane=0; plane<3; plane++){
+        int w= mpi->w >> (plane ? mpi->chroma_x_shift : 0);
+        int h= mpi->h >> (plane ? mpi->chroma_y_shift : 0);
+        uint8_t *dst  = dmpi->planes[plane];
+        int dst_stride= dmpi->stride[plane];
+        double const_values[]={
+            M_PI,
+            M_E,
+            0,
+            0,
+            w,
+            h,
+            vf->priv->framenum,
+            w/(double)mpi->w,
+            h/(double)mpi->h,
+            0
+        };
+        if (!vf->priv->e[plane]) continue;
+        for(y=0; y<h; y++){
+            const_values[3]=y;
+            for(x=0; x<w; x++){
+                const_values[2]=x;
+                dst[x + y * dst_stride] = av_eval_expr(vf->priv->e[plane],
+                                                       const_values, vf);
+            }
+        }
+    }
+
+    vf->priv->framenum++;
+
+    return vf_next_put_image(vf,dmpi, pts);
+}
+
+static void uninit(struct vf_instance *vf){
+    av_free(vf->priv);
+    vf->priv=NULL;
+}
+
+//===========================================================================//
+static int vf_open(vf_instance_t *vf, char *args){
+    char eq[3][2000] = { { 0 }, { 0 }, { 0 } };
+    int plane, res;
+
+    vf->config=config;
+    vf->put_image=put_image;
+//    vf->get_image=get_image;
+    vf->uninit=uninit;
+    vf->priv=av_malloc(sizeof(struct vf_priv_s));
+    memset(vf->priv, 0, sizeof(struct vf_priv_s));
+
+    if (args) sscanf(args, "%1999[^:]:%1999[^:]:%1999[^:]", eq[0], eq[1], eq[2]);
+
+    if (!eq[1][0]) strncpy(eq[1], eq[0], sizeof(eq[0])-1);
+    if (!eq[2][0]) strncpy(eq[2], eq[1], sizeof(eq[0])-1);
+
+    for(plane=0; plane<3; plane++){
+        static const char *const_names[]={
+            "PI",
+            "E",
+            "X",
+            "Y",
+            "W",
+            "H",
+            "N",
+            "SW",
+            "SH",
+            NULL
+        };
+        static const char *func2_names[]={
+            "lum",
+            "cb",
+            "cr",
+            "p",
+            NULL
+        };
+        double (*func2[])(void *, double, double)={
+            lum,
+            cb,
+            cr,
+            plane==0 ? lum : (plane==1 ? cb : cr),
+            NULL
+        };
+        res = av_parse_expr(&vf->priv->e[plane], eq[plane], const_names, NULL, NULL, func2_names, func2, 0, NULL);
+
+        if (res < 0) {
+            mp_msg(MSGT_VFILTER, MSGL_ERR, "geq: error loading equation `%s'\n", eq[plane]);
+            return 0;
+        }
+    }
+
+    return 1;
+}
+
+const vf_info_t vf_info_geq = {
+    "generic equation filter",
+    "geq",
+    "Michael Niedermayer",
+    "",
+    vf_open,
+    NULL
+};