libmpcodecs/vf_mirror.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <inttypes.h>
   5
   6 #include "config.h"
   7 #include "mp_msg.h"
   8
   9 #include "img_format.h"
  10 #include "mp_image.h"
  11 #include "vf.h"
  12
  13 #include "libvo/fastmemcpy.h"
  14
  15
  16 static void mirror(unsigned char* dst,unsigned char* src,int dststride,int srcstride,int w,int h,int bpp,unsigned int fmt){
  17     int y;
  18     for(y=0;y<h;y++){
  19         int x;
  20         switch(bpp){
  21         case 1:
  22             for(x=0;x<w;x++) dst[x]=src[w-x-1];
  23             break;
  24         case 2:
  25             switch(fmt){
  26             case IMGFMT_UYVY: {
  27                 // packed YUV is tricky. U,V are 32bpp while Y is 16bpp:
  28                 int w2=w>>1;
  29                 for(x=0;x<w2;x++){
  30                     // TODO: optimize this...
  31                     dst[x*4+0]=src[0+(w2-x-1)*4];
  32                     dst[x*4+1]=src[3+(w2-x-1)*4];
  33                     dst[x*4+2]=src[2+(w2-x-1)*4];
  34                     dst[x*4+3]=src[1+(w2-x-1)*4];
  35                 }
  36                 break; }
  37             case IMGFMT_YUY2:
  38             case IMGFMT_YVYU: {
  39                 // packed YUV is tricky. U,V are 32bpp while Y is 16bpp:
  40                 int w2=w>>1;
  41                 for(x=0;x<w2;x++){
  42                     // TODO: optimize this...
  43                     dst[x*4+0]=src[2+(w2-x-1)*4];
  44                     dst[x*4+1]=src[1+(w2-x-1)*4];
  45                     dst[x*4+2]=src[0+(w2-x-1)*4];
  46                     dst[x*4+3]=src[3+(w2-x-1)*4];
  47                 }
  48                 break; }
  49             default:
  50                 for(x=0;x<w;x++) *((short*)(dst+x*2))=*((short*)(src+(w-x-1)*2));
  51             }
  52             break;
  53         case 3:
  54             for(x=0;x<w;x++){
  55                 dst[x*3+0]=src[0+(w-x-1)*3];
  56                 dst[x*3+1]=src[1+(w-x-1)*3];
  57                 dst[x*3+2]=src[2+(w-x-1)*3];
  58             }
  59             break;
  60         case 4:
  61             for(x=0;x<w;x++) *((int*)(dst+x*4))=*((int*)(src+(w-x-1)*4));
  62         }
  63         src+=srcstride;
  64         dst+=dststride;
  65     }
  66 }
  67
  68 //===========================================================================//
  69
  70 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
  71     mp_image_t *dmpi;
  72
  73     // hope we'll get DR buffer:
  74     dmpi=vf_get_image(vf->next,mpi->imgfmt,
  75         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
  76         mpi->w, mpi->h);
  77
  78     if(mpi->flags&MP_IMGFLAG_PLANAR){
  79                mirror(dmpi->planes[0],mpi->planes[0],
  80                dmpi->stride[0],mpi->stride[0],
  81                dmpi->w,dmpi->h,1,mpi->imgfmt);
  82                mirror(dmpi->planes[1],mpi->planes[1],
  83                dmpi->stride[1],mpi->stride[1],
  84                dmpi->w>>mpi->chroma_x_shift,dmpi->h>>mpi->chroma_y_shift,1,mpi->imgfmt);
  85                mirror(dmpi->planes[2],mpi->planes[2],
  86                dmpi->stride[2],mpi->stride[2],
  87                dmpi->w>>mpi->chroma_x_shift,dmpi->h>>mpi->chroma_y_shift,1,mpi->imgfmt);
  88     } else {
  89         mirror(dmpi->planes[0],mpi->planes[0],
  90                dmpi->stride[0],mpi->stride[0],
  91                dmpi->w,dmpi->h,dmpi->bpp>>3,mpi->imgfmt);
  92         dmpi->planes[1]=mpi->planes[1]; // passthrough rgb8 palette
  93     }
  94
  95     return vf_next_put_image(vf,dmpi, pts);
  96 }
  97
  98 //===========================================================================//
  99
 100 static int open(vf_instance_t *vf, char* args){
 101     //vf->config=config;
 102     vf->put_image=put_image;
 103     return 1;
 104 }
 105
 106 vf_info_t vf_info_mirror = {
 107     "horizontal mirror",
 108     "mirror",
 109     "Eyck",
 110     "",
 111     open,
 112     NULL
 113 };
 114
 115 //===========================================================================//