libmpcodecs/vf_palette.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer 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  * MPlayer 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 along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <inttypes.h>
  23
  24 #include "config.h"
  25 #include "mp_msg.h"
  26
  27 #include "img_format.h"
  28 #include "mp_image.h"
  29 #include "vf.h"
  30 #include "mpbswap.h"
  31
  32 #include "libswscale/swscale.h"
  33
  34 //===========================================================================//
  35
  36 // commented out 16 and 15 bit output support, because the conversion
  37 // routines are incorrrect.  they assume the palette to be of the same
  38 // depth as the output, which is incorrect. --Joey
  39
  40 static const unsigned int bgr_list[]={
  41     IMGFMT_BGR32,
  42     IMGFMT_BGR24,
  43 //    IMGFMT_BGR16,
  44 //    IMGFMT_BGR15,
  45     0
  46 };
  47 static const unsigned int rgb_list[]={
  48     IMGFMT_RGB32,
  49     IMGFMT_RGB24,
  50 //    IMGFMT_RGB16,
  51 //    IMGFMT_RGB15,
  52     0
  53 };
  54
  55 /**
  56  * Palette is assumed to contain BGR16, see rgb32to16 to convert the palette.
  57  */
  58 static void palette8torgb16(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
  59 {
  60     long i;
  61     for (i=0; i<num_pixels; i++)
  62         ((uint16_t *)dst)[i] = ((const uint16_t *)palette)[src[i]];
  63 }
  64
  65 static void palette8tobgr16(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
  66 {
  67     long i;
  68     for (i=0; i<num_pixels; i++)
  69         ((uint16_t *)dst)[i] = bswap_16(((const uint16_t *)palette)[src[i]]);
  70 }
  71
  72 static unsigned int gray_pal[256];
  73
  74 static unsigned int find_best(struct vf_instance *vf, unsigned int fmt){
  75     unsigned int best=0;
  76     int ret;
  77     const unsigned int* p;
  78     if(fmt==IMGFMT_BGR8) p=bgr_list;
  79     else if(fmt==IMGFMT_RGB8) p=rgb_list;
  80     else return 0;
  81     while(*p){
  82         ret=vf->next->query_format(vf->next,*p);
  83         mp_msg(MSGT_VFILTER,MSGL_DBG2,"[%s] query(%s) -> %d\n",vf->info->name,vo_format_name(*p),ret&3);
  84         if(ret&VFCAP_CSP_SUPPORTED_BY_HW){ best=*p; break;} // no conversion -> bingo!
  85         if(ret&VFCAP_CSP_SUPPORTED && !best) best=*p; // best with conversion
  86         ++p;
  87     }
  88     return best;
  89 }
  90
  91 //===========================================================================//
  92
  93 struct vf_priv_s {
  94     unsigned int fmt;
  95     int pal_msg;
  96 };
  97
  98 static int config(struct vf_instance *vf,
  99         int width, int height, int d_width, int d_height,
 100         unsigned int flags, unsigned int outfmt){
 101     if (!vf->priv->fmt)
 102         vf->priv->fmt=find_best(vf,outfmt);
 103     if(!vf->priv->fmt){
 104         // no matching fmt, so force one...
 105         if(outfmt==IMGFMT_RGB8) vf->priv->fmt=IMGFMT_RGB32;
 106         else if(outfmt==IMGFMT_BGR8) vf->priv->fmt=IMGFMT_BGR32;
 107         else return 0;
 108     }
 109     return vf_next_config(vf,width,height,d_width,d_height,flags,vf->priv->fmt);
 110 }
 111
 112 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
 113     mp_image_t *dmpi;
 114     uint8_t *old_palette = mpi->planes[1];
 115
 116     // hope we'll get DR buffer:
 117     dmpi=vf_get_image(vf->next,vf->priv->fmt,
 118         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
 119         mpi->w, mpi->h);
 120
 121     if (!mpi->planes[1])
 122     {
 123         if(!vf->priv->pal_msg){
 124             mp_msg(MSGT_VFILTER,MSGL_V,"[%s] no palette given, assuming builtin grayscale one\n",vf->info->name);
 125             vf->priv->pal_msg=1;
 126         }
 127         mpi->planes[1] = (unsigned char*)gray_pal;
 128     }
 129
 130     if(mpi->w==mpi->stride[0] && dmpi->w*(dmpi->bpp>>3)==dmpi->stride[0]){
 131         // no stride conversion needed
 132         switch(IMGFMT_RGB_DEPTH(dmpi->imgfmt)){
 133         case 15:
 134         case 16:
 135             if (IMGFMT_IS_BGR(dmpi->imgfmt))
 136                 palette8tobgr16(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
 137             else
 138                 palette8torgb16(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
 139             break;
 140         case 24:
 141             if (IMGFMT_IS_BGR(dmpi->imgfmt))
 142                 sws_convertPalette8ToPacked24(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
 143             else
 144                 sws_convertPalette8ToPacked24(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
 145             break;
 146         case 32:
 147             if (IMGFMT_IS_BGR(dmpi->imgfmt))
 148                 sws_convertPalette8ToPacked32(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
 149             else
 150                 sws_convertPalette8ToPacked32(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
 151             break;
 152         }
 153     } else {
 154         int y;
 155         for(y=0;y<mpi->h;y++){
 156             unsigned char* src=mpi->planes[0]+y*mpi->stride[0];
 157             unsigned char* dst=dmpi->planes[0]+y*dmpi->stride[0];
 158             switch(IMGFMT_RGB_DEPTH(dmpi->imgfmt)){
 159             case 15:
 160             case 16:
 161                 if (IMGFMT_IS_BGR(dmpi->imgfmt))
 162                     palette8tobgr16(src,dst,mpi->w,mpi->planes[1]);
 163                 else
 164                     palette8torgb16(src,dst,mpi->w,mpi->planes[1]);
 165                 break;
 166             case 24:
 167                 if (IMGFMT_IS_BGR(dmpi->imgfmt))
 168                     sws_convertPalette8ToPacked24(src,dst,mpi->w,mpi->planes[1]);
 169                 else
 170                     sws_convertPalette8ToPacked24(src,dst,mpi->w,mpi->planes[1]);
 171                 break;
 172             case 32:
 173                 if (IMGFMT_IS_BGR(dmpi->imgfmt))
 174                     sws_convertPalette8ToPacked32(src,dst,mpi->w,mpi->planes[1]);
 175                 else
 176                     sws_convertPalette8ToPacked32(src,dst,mpi->w,mpi->planes[1]);
 177                 break;
 178             }
 179         }
 180     }
 181     mpi->planes[1] = old_palette;
 182
 183     return vf_next_put_image(vf,dmpi, pts);
 184 }
 185
 186 //===========================================================================//
 187
 188 static int query_format(struct vf_instance *vf, unsigned int fmt){
 189     int best=find_best(vf,fmt);
 190     if(!best) return 0; // no match
 191     return vf->next->query_format(vf->next,best);
 192 }
 193
 194 static void uninit(vf_instance_t *vf) {
 195   free(vf->priv);
 196 }
 197
 198 static int vf_open(vf_instance_t *vf, char *args){
 199     unsigned int i;
 200     vf->config=config;
 201     vf->uninit=uninit;
 202     vf->put_image=put_image;
 203     vf->query_format=query_format;
 204     vf->priv=malloc(sizeof(struct vf_priv_s));
 205     memset(vf->priv, 0, sizeof(struct vf_priv_s));
 206     for(i=0;i<256;i++) gray_pal[i]=0x01010101*i;
 207     if (args)
 208     {
 209         if (!strcasecmp(args,"rgb15")) vf->priv->fmt=IMGFMT_RGB15; else
 210         if (!strcasecmp(args,"rgb16")) vf->priv->fmt=IMGFMT_RGB16; else
 211         if (!strcasecmp(args,"rgb24")) vf->priv->fmt=IMGFMT_RGB24; else
 212         if (!strcasecmp(args,"rgb32")) vf->priv->fmt=IMGFMT_RGB32; else
 213         if (!strcasecmp(args,"bgr15")) vf->priv->fmt=IMGFMT_BGR15; else
 214         if (!strcasecmp(args,"bgr16")) vf->priv->fmt=IMGFMT_BGR16; else
 215         if (!strcasecmp(args,"bgr24")) vf->priv->fmt=IMGFMT_BGR24; else
 216         if (!strcasecmp(args,"bgr32")) vf->priv->fmt=IMGFMT_BGR32; else
 217         {
 218             mp_tmsg(MSGT_VFILTER, MSGL_WARN, "[VF_FORMAT] Unknown format name: '%s'.\n", args);
 219             return 0;
 220         }
 221     }
 222     return 1;
 223 }
 224
 225 const vf_info_t vf_info_palette = {
 226     "8bpp indexed (using palette) -> BGR 15/16/24/32 conversion",
 227     "palette",
 228     "A'rpi & Alex",
 229     "",
 230     vf_open,
 231     NULL
 232 };
 233
 234 //===========================================================================//