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 "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 #include "libavcodec/avcodec.h"
  35 #include "libavcodec/eval.h"
  36
  37
  38 struct vf_priv_s {
  39         char eq[200];
  40         int8_t *qp;
  41         int8_t lut[257];
  42         int qp_stride;
  43 };
  44
  45 static int config(struct vf_instance *vf,
  46         int width, int height, int d_width, int d_height,
  47         unsigned int flags, unsigned int outfmt){
  48         int h= (height+15)>>4;
  49         int i;
  50
  51         vf->priv->qp_stride= (width+15)>>4;
  52         vf->priv->qp= av_malloc(vf->priv->qp_stride*h*sizeof(int8_t));
  53
  54         for(i=-129; i<128; i++){
  55             double const_values[]={
  56                 M_PI,
  57                 M_E,
  58                 i != -129,
  59                 i,
  60                 0
  61             };
  62             static const char *const_names[]={
  63                 "PI",
  64                 "E",
  65                 "known",
  66                 "qp",
  67                 NULL
  68             };
  69
  70             const char *error = NULL;
  71             vf->priv->lut[i+129]= lrintf(ff_parse_and_eval_expr(vf->priv->eq, const_values, const_names, NULL, NULL, NULL, NULL, NULL, &error));
  72             if (error)
  73                 mp_msg(MSGT_VFILTER, MSGL_ERR, "qp: Error evaluating \"%s\": %s\n", vf->priv->eq, error);
  74         }
  75
  76         return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
  77 }
  78
  79 static void get_image(struct vf_instance *vf, mp_image_t *mpi){
  80     if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
  81     // ok, we can do pp in-place (or pp disabled):
  82     vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
  83         mpi->type, mpi->flags, mpi->w, mpi->h);
  84     mpi->planes[0]=vf->dmpi->planes[0];
  85     mpi->stride[0]=vf->dmpi->stride[0];
  86     mpi->width=vf->dmpi->width;
  87     if(mpi->flags&MP_IMGFLAG_PLANAR){
  88         mpi->planes[1]=vf->dmpi->planes[1];
  89         mpi->planes[2]=vf->dmpi->planes[2];
  90         mpi->stride[1]=vf->dmpi->stride[1];
  91         mpi->stride[2]=vf->dmpi->stride[2];
  92     }
  93     mpi->flags|=MP_IMGFLAG_DIRECT;
  94 }
  95
  96 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
  97         mp_image_t *dmpi;
  98         int x,y;
  99
 100         if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
 101                 // no DR, so get a new image! hope we'll get DR buffer:
 102                 vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
 103                 MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE|MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 104                 mpi->w,mpi->h);
 105         }
 106
 107         dmpi= vf->dmpi;
 108
 109         if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
 110                 memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h, dmpi->stride[0], mpi->stride[0]);
 111                 if(mpi->flags&MP_IMGFLAG_PLANAR){
 112                     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]);
 113                     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]);
 114                 }
 115         }
 116         vf_clone_mpi_attributes(dmpi, mpi);
 117
 118         dmpi->qscale = vf->priv->qp;
 119         dmpi->qstride= vf->priv->qp_stride;
 120         if(mpi->qscale){
 121             for(y=0; y<((dmpi->h+15)>>4); y++){
 122                 for(x=0; x<vf->priv->qp_stride; x++){
 123                     dmpi->qscale[x + dmpi->qstride*y]=
 124                         vf->priv->lut[ 129 + ((int8_t)mpi->qscale[x + mpi->qstride*y]) ];
 125                 }
 126             }
 127         }else{
 128             int qp= vf->priv->lut[0];
 129             for(y=0; y<((dmpi->h+15)>>4); y++){
 130                 for(x=0; x<vf->priv->qp_stride; x++){
 131                     dmpi->qscale[x + dmpi->qstride*y]= qp;
 132                 }
 133             }
 134         }
 135
 136         return vf_next_put_image(vf,dmpi, pts);
 137 }
 138
 139 static void uninit(struct vf_instance *vf){
 140         if(!vf->priv) return;
 141
 142         if(vf->priv->qp) av_free(vf->priv->qp);
 143         vf->priv->qp= NULL;
 144
 145         av_free(vf->priv);
 146         vf->priv=NULL;
 147 }
 148
 149 //===========================================================================//
 150 static int vf_open(vf_instance_t *vf, char *args){
 151     vf->config=config;
 152     vf->put_image=put_image;
 153     vf->get_image=get_image;
 154     vf->uninit=uninit;
 155     vf->priv=av_malloc(sizeof(struct vf_priv_s));
 156     memset(vf->priv, 0, sizeof(struct vf_priv_s));
 157
 158 //    avcodec_init();
 159
 160     if (args) strncpy(vf->priv->eq, args, 199);
 161
 162     return 1;
 163 }
 164
 165 const vf_info_t vf_info_qp = {
 166     "QP changer",
 167     "qp",
 168     "Michael Niedermayer",
 169     "",
 170     vf_open,
 171     NULL
 172 };