libmpcodecs/vf_qp.c

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