streamtools/frameshow.c

   1 /*
   2     JPC-RR: A x86 PC Hardware Emulator
   3     Release 1
   4
   5     Copyright (C) 2009 H. Ilari Liusvaara
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License version 2 as published by
   9     the Free Software Foundation.
  10
  11     This program 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 this program; if not, write to the Free Software Foundation, Inc.,
  18     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19
  20     Based on JPC x86 PC Hardware emulator,
  21     A project from the Physics Dept, The University of Oxford
  22
  23     Details about original JPC can be found at:
  24
  25     www-jpc.physics.ox.ac.uk
  26
  27 */
  28
  29 #include "frame.h"
  30 #include <stdio.h>
  31 #include "SDL.h"
  32
  33 int main(int argc, char** argv)
  34 {
  35         if(argc < 2) {
  36                 fprintf(stderr, "usage: %s <filename>\n", argv[0]);
  37                 fprintf(stderr, "Show video contained in stream <filename> in window.\n");
  38                 return 1;
  39         }
  40         struct frame_input_stream* in = fis_open(argv[1]);
  41         struct frame* frame;
  42         int prev_width = -1;
  43         int prev_height = -1;
  44
  45         if(SDL_Init(SDL_INIT_VIDEO) < 0) {
  46                 fprintf(stderr, "Can't initialize SDL.\n");
  47                 return 1;
  48         }
  49
  50         int rbyte, gbyte, bbyte;
  51
  52         SDL_Surface* surf;
  53
  54         while((frame = fis_next_frame(in))) {
  55                 if(prev_width != frame->f_width || prev_height != frame->f_height)
  56                         surf = SDL_SetVideoMode(frame->f_width, frame->f_height, 32, SDL_SWSURFACE | SDL_DOUBLEBUF);
  57                 prev_width = frame->f_width;
  58                 prev_height = frame->f_height;
  59                 SDL_LockSurface(surf);
  60                 uint32_t* data = surf->pixels;
  61                 for(uint32_t y = 0; y < frame->f_height; y++) {
  62                         for(uint32_t x = 0; x < frame->f_width; x++) {
  63                                 uint32_t v = 0;
  64                                 v += (((frame->f_framedata[y * frame->f_width + x] >> 16) & 0xFF)
  65                                         << surf->format->Rshift);
  66                                 v += (((frame->f_framedata[y * frame->f_width + x] >> 8) & 0xFF)
  67                                         << surf->format->Gshift);
  68                                 v += (((frame->f_framedata[y * frame->f_width + x]) & 0xFF)
  69                                         << surf->format->Bshift);
  70
  71                                 data[y * surf->pitch / 4 + x] = v;
  72                         }
  73                 }
  74                 SDL_UnlockSurface(surf);
  75                 SDL_Flip(surf);
  76                 frame_release(frame);
  77         }
  78
  79         fis_close(in);
  80         SDL_Quit();
  81         return 0;
  82 }