libvo/vo_tga.c

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