libvo/vo_tga.c

   1 /*
   2  * TARGA video output
   3  *
   4  * This video output module writes TARGA uncompressed files in 15, 24 and 32
   5  * bit BGR format.
   6  *
   7  * to select the output format use the format filter:
   8  *  mplayer -vo tga -vf format=bgr15 ...
   9  *  mplayer -vo tga -vf format=bgr24 ...
  10  *  mplayer -vo tga -vf format=bgr32 ...
  11  *
  12  * The 16 bit files are loaded without problem from Gimp and ImageMagick but
  13  * give an error with entice (a visualizer from the enlightenment package
  14  * that uses the imlib2 package).
  15  *
  16  * In 32-bit mode the alpha channel is set to 255 (0xff). For big-endian
  17  * machines, TGA_ALPHA32 changes from 0xff000000 to 0x000000ff, and
  18  * TGA_SHIFT32 from 0 to 8.
  19  *
  20  * I need to fill the alpha channel because entice considers that alpha
  21  * channel (and displays nothing, only the background!), but ImageMagick
  22  * (the program display) or gimp doesn't care.
  23  *
  24  * Maybe it is possible (with a compilation switch) to avoid the fill of
  25  * the alpha channel and work outside MPlayer (if needed).
  26  *
  27  *    Daniele Forghieri ( guru@digitalfantasy.it )
  28  *
  29  * This file is part of MPlayer.
  30  *
  31  * MPlayer is free software; you can redistribute it and/or modify
  32  * it under the terms of the GNU General Public License as published by
  33  * the Free Software Foundation; either version 2 of the License, or
  34  * (at your option) any later version.
  35  *
  36  * MPlayer is distributed in the hope that it will be useful,
  37  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  38  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  39  * GNU General Public License for more details.
  40  *
  41  * You should have received a copy of the GNU General Public License along
  42  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  43  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  44  */
  45
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <errno.h>
  50 #include <math.h>
  51
  52 #include "config.h"
  53 #include "mp_msg.h"
  54 #include "help_mp.h"
  55 #include "video_out.h"
  56 #include "video_out_internal.h"
  57
  58 static const vo_info_t info =
  59 {
  60         "Targa output",
  61         "tga",
  62         "Daniele Forghieri - guru@digitalfantasy.it",
  63         ""
  64 };
  65
  66
  67 const LIBVO_EXTERN (tga)
  68
  69 /* locals vars */
  70 static int      frame_num = 0;
  71 static void     *line_buff;
  72
  73 static void tga_make_header(uint8_t *h, int dx, int dy, int bpp)
  74 {
  75
  76     int  i;
  77
  78     for(i = 0; i < 18; i++) {
  79         switch (i) {
  80         case 2:
  81             *h = 0x02;
  82             break;
  83
  84         case 12:
  85             *h = dx & 0xff;
  86             break;
  87
  88         case 13:
  89             *h = (dx >> 8) & 0xff;
  90             break;
  91
  92         case 14:
  93             *h = dy & 0xff;
  94             break;
  95
  96         case 15:
  97             *h = (dy >> 8) & 0xff;
  98             break;
  99
 100         case 16:
 101             *h = bpp;
 102             break;
 103
 104         case 17:
 105             *h = 0x20;
 106             break;
 107
 108         default:
 109             *h = 0;
 110         }
 111         ++h;
 112     }
 113
 114 }
 115
 116 static int write_tga( char *file, int bpp, int dx, int dy, uint8_t *buf, int stride)
 117 {
 118     int   er;
 119     FILE  *fo;
 120
 121     fo = fopen(file, "wb");
 122     if (fo != NULL) {
 123         uint8_t hdr[18];
 124
 125         er = 0;
 126         tga_make_header(hdr, dx, dy, bpp);
 127         if (fwrite(hdr, sizeof(hdr), 1, fo) == 1) {
 128             int    wb;
 129
 130             wb = ((bpp + 7) / 8) * dx;
 131             if (bpp == 32) {
 132                 /* Setup the alpha channel for every pixel */
 133                 while (dy-- > 0) {
 134                     uint8_t    *d;
 135                     uint8_t    *s;
 136                     int         x;
 137
 138                     s = buf;
 139                     d = line_buff;
 140                     for(x = 0; x < dx; x++) {
 141                     #ifdef WORDS_BIGENDIAN
 142                         d[0] = s[3];
 143                         d[1] = s[2];
 144                         d[2] = s[1];
 145                         d[3] = 0xff;
 146                     #else
 147                         d[0] = 0xff;
 148                         d[1] = s[1];
 149                         d[2] = s[2];
 150                         d[3] = s[3];
 151                     #endif
 152                         d+=4;
 153                         s+=4;
 154                     }
 155                     if (fwrite(line_buff, wb, 1, fo) != 1) {
 156                         er = 4;
 157                         break;
 158                     }
 159                     buf += stride;
 160                 }
 161
 162             }
 163             else {
 164                 while (dy-- > 0) {
 165                     if (fwrite(buf, wb, 1, fo) != 1) {
 166                         er = 4;
 167                         break;
 168                     }
 169                     buf += stride;
 170                 }
 171             }
 172         }
 173         else {
 174             er = 2;
 175         }
 176
 177         fclose(fo);
 178     }
 179     else {
 180         er = 1;
 181     }
 182
 183     if (er) {
 184         fprintf(stderr, "Error writing file [%s]\n", file);
 185     }
 186     return er;
 187 }
 188
 189 static uint32_t draw_image(mp_image_t* mpi)
 190 {
 191     char    file[20 + 1];
 192
 193     snprintf (file, 20, "%08d.tga", ++frame_num);
 194
 195     write_tga( file,
 196                mpi->bpp,
 197                mpi->w,
 198                mpi->h,
 199                mpi->planes[0],
 200                mpi->stride[0]);
 201
 202     return VO_TRUE;
 203 }
 204
 205 static int config(uint32_t width, uint32_t height, uint32_t d_width, uint32_t d_height, uint32_t flags, char *title, uint32_t format)
 206 {
 207     /* buffer for alpha */
 208     if(line_buff){ free(line_buff); line_buff=NULL; }
 209     if (format == (IMGFMT_BGR | 32)) {
 210         line_buff = malloc(width * 4);
 211     }
 212     return 0;
 213 }
 214
 215 static void draw_osd(void)
 216 {
 217 }
 218
 219 static void flip_page (void)
 220 {
 221     return;
 222 }
 223
 224 static int draw_slice(uint8_t *srcimg[], int stride[], int w,int h,int x,int y)
 225 {
 226     return -1;
 227 }
 228
 229 static int draw_frame(uint8_t * src[])
 230 {
 231     return -1;
 232 }
 233
 234 static int query_format(uint32_t format)
 235 {
 236     switch(format){
 237         case IMGFMT_BGR|15:
 238         case IMGFMT_BGR|24:
 239         case IMGFMT_BGR|32:
 240             return VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW;
 241     }
 242     return 0;
 243 }
 244
 245 static void uninit(void)
 246 {
 247     if(line_buff){ free(line_buff); line_buff=NULL; }
 248 }
 249
 250 static void check_events(void)
 251 {
 252 }
 253
 254 static int preinit(const char *arg)
 255 {
 256     if(arg) {
 257         mp_msg(MSGT_VO,MSGL_WARN, MSGTR_LIBVO_TGA_UnknownSubdevice,arg);
 258         return ENOSYS;
 259     }
 260     return 0;
 261 }
 262
 263 static int control(uint32_t request, void *data, ...)
 264 {
 265   switch (request) {
 266       case VOCTRL_DRAW_IMAGE:
 267           return draw_image(data);
 268
 269       case VOCTRL_QUERY_FORMAT:
 270           return query_format(*((uint32_t*)data));
 271   }
 272   return VO_NOTIMPL;
 273 }