libmpcodecs/vf_qp.c

   1 /*
   2  * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <math.h>
  25 #include <inttypes.h>
  26
  27 #include <libavutil/eval.h>
  28
  29 #include "mp_msg.h"
  30 #include "cpudetect.h"
  31 #include "img_format.h"
  32 #include "mp_image.h"
  33 #include "vf.h"
  34 #include "libvo/fastmemcpy.h"
  35
  36
  37 struct vf_priv_s {
  38         char eq[200];
  39         int8_t *qp;
  40         int8_t lut[257];
  41         int qp_stride;
  42 };
  43
  44 static int config(struct vf_instance *vf,
  45         int width, int height, int d_width, int d_height,
  46         unsigned int flags, unsigned int outfmt){
  47         int h= (height+15)>>4;
  48         int i;
  49
  50         vf->priv->qp_stride= (width+15)>>4;
  51         vf->priv->qp= av_malloc(vf->priv->qp_stride*h*sizeof(int8_t));
  52
  53         for(i=-129; i<128; i++){
  54             double const_values[]={
  55                 M_PI,
  56                 M_E,
  57                 i != -129,
  58                 i,
  59                 0
  60             };
  61             const char * const const_names[]={
  62                 "PI",
  63                 "E",
  64                 "known",
  65                 "qp",
  66                 NULL
  67             };
  68             double temp_val;
  69             int res;
  70
  71             res= av_expr_parse_and_eval(&temp_val, vf->priv->eq, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, NULL);
  72
  73             if (res < 0){
  74                 mp_msg(MSGT_VFILTER, MSGL_ERR, "qp: Error evaluating \"%s\" \n", vf->priv->eq);
  75                 return 0;
  76             }
  77             vf->priv->lut[i+129]= lrintf(temp_val);
  78         }
  79
  80         return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
  81 }
  82
  83 static void get_image(struct vf_instance *vf, mp_image_t *mpi){
  84     if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
  85     // ok, we can do pp in-place (or pp disabled):
  86     vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
  87         mpi->type, mpi->flags, mpi->w, mpi->h);
  88     mpi->planes[0]=vf->dmpi->planes[0];
  89     mpi->stride[0]=vf->dmpi->stride[0];
  90     mpi->width=vf->dmpi->width;
  91     if(mpi->flags&MP_IMGFLAG_PLANAR){
  92         mpi->planes[1]=vf->dmpi->planes[1];
  93         mpi->planes[2]=vf->dmpi->planes[2];
  94         mpi->stride[1]=vf->dmpi->stride[1];
  95         mpi->stride[2]=vf->dmpi->stride[2];
  96     }
  97     mpi->flags|=MP_IMGFLAG_DIRECT;
  98 }
  99
 100 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
 101         mp_image_t *dmpi;
 102         int x,y;
 103
 104         if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
 105                 // no DR, so get a new image! hope we'll get DR buffer:
 106                 vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
 107                 MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE|MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 108                 mpi->w,mpi->h);
 109         }
 110
 111         dmpi= vf->dmpi;
 112
 113         if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
 114                 memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h, dmpi->stride[0], mpi->stride[0]);
 115                 if(mpi->flags&MP_IMGFLAG_PLANAR){
 116                     memcpy_pic(dmpi->planes[1], mpi->planes[1], mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift, dmpi->stride[1], mpi->stride[1]);
 117                     memcpy_pic(dmpi->planes[2], mpi->planes[2], mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift, dmpi->stride[2], mpi->stride[2]);
 118                 }
 119         }
 120         vf_clone_mpi_attributes(dmpi, mpi);
 121
 122         dmpi->qscale = vf->priv->qp;
 123         dmpi->qstride= vf->priv->qp_stride;
 124         if(mpi->qscale){
 125             for(y=0; y<((dmpi->h+15)>>4); y++){
 126                 for(x=0; x<vf->priv->qp_stride; x++){
 127                     dmpi->qscale[x + dmpi->qstride*y]=
 128                         vf->priv->lut[ 129 + ((int8_t)mpi->qscale[x + mpi->qstride*y]) ];
 129                 }
 130             }
 131         }else{
 132             int qp= vf->priv->lut[0];
 133             for(y=0; y<((dmpi->h+15)>>4); y++){
 134                 for(x=0; x<vf->priv->qp_stride; x++){
 135                     dmpi->qscale[x + dmpi->qstride*y]= qp;
 136                 }
 137             }
 138         }
 139
 140         return vf_next_put_image(vf,dmpi, pts);
 141 }
 142
 143 static void uninit(struct vf_instance *vf){
 144         if(!vf->priv) return;
 145
 146         av_free(vf->priv->qp);
 147         vf->priv->qp= NULL;
 148
 149         av_free(vf->priv);
 150         vf->priv=NULL;
 151 }
 152
 153 //===========================================================================//
 154 static int vf_open(vf_instance_t *vf, char *args){
 155     vf->config=config;
 156     vf->put_image=put_image;
 157     vf->get_image=get_image;
 158     vf->uninit=uninit;
 159     vf->priv=av_malloc(sizeof(struct vf_priv_s));
 160     memset(vf->priv, 0, sizeof(struct vf_priv_s));
 161
 162 //    avcodec_init();
 163
 164     if (args) strncpy(vf->priv->eq, args, 199);
 165
 166     return 1;
 167 }
 168
 169 const vf_info_t vf_info_qp = {
 170     "QP changer",
 171     "qp",
 172     "Michael Niedermayer",
 173     "",
 174     vf_open,
 175     NULL
 176 };