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   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright 2006 Free Software Foundation, Inc.
   4  *
   5  * This file is part of GNU Radio
   6  *
   7  * GNU Radio is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * GNU Radio is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Radio; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street,
  20  * Boston, MA 02110-1301, USA.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include <SDL.h>
  28
  29 #include <video_sdl_sink_uc.h>
  30 #include <gr_io_signature.h>
  31 #include <sys/ioctl.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <fcntl.h>
  35 #include <unistd.h>
  36 #include <stdio.h>
  37 #include <iostream>
  38 #include <stdexcept>
  39
  40
  41
  42 video_sdl_sink_uc::video_sdl_sink_uc (double framerate,int width, int height,unsigned int format,int dst_width,int dst_height)
  43   : gr_sync_block ("video_sdl_sink_uc",
  44                    gr_make_io_signature (1, 3, sizeof (unsigned char)),
  45                    gr_make_io_signature (0, 0, 0)),
  46     d_chunk_size (width*height),
  47     d_framerate(framerate),
  48     d_wanted_frametime_ms(0),
  49     d_width(width),
  50     d_height (height),
  51     d_dst_width(dst_width),
  52     d_dst_height(dst_height),
  53     d_format(format),
  54     d_current_line(0),
  55     d_screen(NULL),
  56     d_image(NULL),
  57     d_avg_delay(0.0),
  58     d_wanted_ticks(0)
  59 {
  60   if(framerate<=0.0)
  61     d_wanted_frametime_ms=0;//Go as fast as possible
  62   else
  63     d_wanted_frametime_ms=(int)(1000.0/framerate);
  64   if(dst_width<0) d_dst_width=d_width;
  65   if(dst_height<0) d_dst_height=d_height;
  66   if(0==format) d_format=IMGFMT_YV12;
  67
  68   atexit(SDL_Quit);//check if this is the way to do this
  69   if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
  70     std::cerr << "video_sdl_sink_uc: Couldn't initialize SDL:" << SDL_GetError() << " \n SDL_Init(SDL_INIT_VIDEO) failed\n";
  71     throw std::runtime_error ("video_sdl_sink_uc");
  72   };
  73
  74   /* accept any depth */
  75   d_screen = SDL_SetVideoMode(dst_width, dst_height, 0, SDL_SWSURFACE|SDL_RESIZABLE|SDL_ANYFORMAT);//SDL_DOUBLEBUF |SDL_SWSURFACE| SDL_HWSURFACE||SDL_FULLSCREEN
  76   if ( d_screen == NULL ) {
  77     std::cerr << "Unable to set SDL video mode: " << SDL_GetError() <<"\n SDL_SetVideoMode() Failed \n";
  78     exit(1);
  79   }
  80   if ( d_image ) {
  81       SDL_FreeYUVOverlay(d_image);
  82     }
  83   /* Initialize and create the YUV Overlay used for video out */
  84   if (!(d_image = SDL_CreateYUVOverlay (d_width, d_height, SDL_YV12_OVERLAY, d_screen))) {
  85     std::cerr << "SDL: Couldn't create a YUV overlay: \n"<< SDL_GetError() <<"\n";
  86     throw std::runtime_error ("video_sdl_sink_uc");
  87   }
  88
  89   printf("SDL screen_mode %d bits-per-pixel\n",
  90          d_screen->format->BitsPerPixel);
  91   printf("SDL overlay_mode %i \n",
  92          d_image->format);
  93   d_chunk_size = std::min(1,16384/width); //width*16;
  94   d_chunk_size = d_chunk_size*width;
  95   //d_chunk_size = (int) (width);
  96   set_output_multiple (d_chunk_size);
  97   /* Set the default playback area */
  98   d_dst_rect.x = 0;
  99   d_dst_rect.y = 0;
 100   d_dst_rect.w = d_dst_width;
 101   d_dst_rect.h = d_dst_height;
 102   //clear the surface to grey
 103   if ( SDL_LockYUVOverlay( d_image ) ) {
 104     std::cerr << "SDL: Couldn't lock YUV overlay: \n"<< SDL_GetError() <<"\n";
 105     throw std::runtime_error ("video_sdl_sink_uc");
 106   }
 107   memset(d_image->pixels[0], 128, d_image->pitches[0]*d_height);
 108   memset(d_image->pixels[1], 128, d_image->pitches[1]*d_height/2);
 109   memset(d_image->pixels[2], 128, d_image->pitches[2]*d_height/2);
 110   SDL_UnlockYUVOverlay( d_image );
 111 }
 112
 113 video_sdl_sink_uc::~video_sdl_sink_uc ()
 114 {
 115   SDL_Quit();
 116 }
 117
 118 video_sdl_sink_uc_sptr
 119 video_sdl_make_sink_uc (double framerate,int width, int height,unsigned int format,int dst_width,int dst_height)
 120 {
 121   return video_sdl_sink_uc_sptr (new video_sdl_sink_uc (framerate, width, height,format,dst_width,dst_height));
 122 }
 123
 124 void
 125 video_sdl_sink_uc::copy_line_pixel_interleaved(unsigned char *dst_pixels_u,unsigned char *dst_pixels_v,const unsigned char * src_pixels,int src_width)
 126 {
 127   for(int i=0;i<src_width;i++)
 128   {
 129     dst_pixels_u[i]=src_pixels[i*2];
 130     dst_pixels_v[i]=src_pixels[i*2+1];
 131   }
 132   return;
 133 }
 134
 135 void
 136 video_sdl_sink_uc::copy_line_line_interleaved(unsigned char *dst_pixels_u,unsigned char *dst_pixels_v,const unsigned char * src_pixels,int src_width)
 137 {
 138   memcpy(dst_pixels_u, src_pixels, src_width);
 139   memcpy(dst_pixels_v, src_pixels+src_width, src_width);
 140   return;
 141 }
 142
 143 void
 144 video_sdl_sink_uc::copy_line_single_plane(unsigned char *dst_pixels,const unsigned char * src_pixels,int src_width)
 145 {
 146   memcpy(dst_pixels, src_pixels, src_width);
 147   return;
 148 }
 149
 150 void
 151 video_sdl_sink_uc::copy_line_single_plane_dec2(unsigned char *dst_pixels,const unsigned char * src_pixels,int src_width)
 152 {
 153   for(int i=0,j=0;i<src_width;i+=2,j++)
 154   {
 155     dst_pixels[j]=(unsigned char)src_pixels[i];
 156   }
 157   return;
 158 }
 159
 160 int
 161 video_sdl_sink_uc::copy_plane_to_surface (int plane,int noutput_items,
 162                       const unsigned char * src_pixels)
 163 {
 164     const int first_dst_plane=(12==plane ||1122==plane)?1:plane;
 165     const int second_dst_plane=(12==plane ||1122==plane)?2:plane;
 166     int current_line=(0==plane)?d_current_line:d_current_line/2;
 167     unsigned char * dst_pixels = (unsigned char *)d_image->pixels[first_dst_plane];
 168     dst_pixels=&dst_pixels[current_line*d_image->pitches[first_dst_plane]];
 169     unsigned char * dst_pixels_2 = (unsigned char *)d_image->pixels[second_dst_plane];
 170     dst_pixels_2=&dst_pixels_2[current_line*d_image->pitches[second_dst_plane]];
 171     int src_width=(0==plane || 12==plane || 1122==plane)?d_width:d_width/2;
 172     int noutput_items_produced=0;
 173     int max_height=(0==plane)?d_height-1:d_height/2-1;
 174     for (int i = 0; i < noutput_items; i += src_width){
 175         //output one line at a time
 176         if(12==plane)
 177         {
 178           copy_line_pixel_interleaved(dst_pixels,dst_pixels_2,src_pixels,src_width);
 179           dst_pixels_2 += d_image->pitches[second_dst_plane];
 180         }
 181         else if (1122==plane)
 182           {
 183             copy_line_line_interleaved(dst_pixels,dst_pixels_2,src_pixels,src_width);
 184             dst_pixels_2 += d_image->pitches[second_dst_plane];
 185             src_pixels += src_width;
 186           }
 187         else if (0==plane)
 188           copy_line_single_plane(dst_pixels,src_pixels,src_width);
 189         else /* 1==plane || 2==plane*/
 190           copy_line_single_plane_dec2(dst_pixels,src_pixels,src_width);//decimate by two horizontally
 191         src_pixels += src_width;
 192         dst_pixels += d_image->pitches[first_dst_plane];
 193         noutput_items_produced+=src_width;
 194         current_line++;
 195         if (current_line>max_height)
 196         {
 197           //Start new frame
 198           //TODO, do this all in a seperate thread
 199           current_line=0;
 200           dst_pixels=d_image->pixels[first_dst_plane];
 201           dst_pixels_2=d_image->pixels[second_dst_plane];
 202           if(0==plane)
 203           {
 204             SDL_DisplayYUVOverlay(d_image, &d_dst_rect);
 205             //SDL_Flip(d_screen);
 206             unsigned int ticks=SDL_GetTicks();//milliseconds
 207             d_wanted_ticks+=d_wanted_frametime_ms;
 208             float avg_alpha=0.1;
 209             int time_diff=d_wanted_ticks-ticks;
 210             d_avg_delay=time_diff*avg_alpha +d_avg_delay*(1.0-avg_alpha);
 211           }
 212         }
 213       }
 214     if(0==plane) d_current_line=current_line;
 215   return noutput_items_produced;
 216 }
 217
 218 int
 219 video_sdl_sink_uc::work (int noutput_items,
 220                       gr_vector_const_void_star &input_items,
 221                       gr_vector_void_star &output_items)
 222 {
 223   unsigned char *src_pixels_0,*src_pixels_1,*src_pixels_2;
 224   int noutput_items_produced=0;
 225   int plane;
 226   int delay=(int)d_avg_delay;
 227   if(0==d_wanted_ticks)
 228     d_wanted_ticks=SDL_GetTicks();
 229   if(delay>0)
 230     SDL_Delay((unsigned int)delay);//compensate if running too fast
 231
 232   if ( SDL_LockYUVOverlay( d_image ) ) {
 233     return 0;
 234   }
 235   switch (input_items.size ()){
 236   case 3:               // first channel=Y, second channel is  U , third channel is V
 237     src_pixels_0 = (unsigned char *) input_items[0];
 238     src_pixels_1 = (unsigned char *) input_items[1];
 239     src_pixels_2 = (unsigned char *) input_items[2];
 240     for (int i = 0; i < noutput_items; i += d_chunk_size){
 241       copy_plane_to_surface (1,d_chunk_size, src_pixels_1);
 242       copy_plane_to_surface (2,d_chunk_size, src_pixels_2);
 243       noutput_items_produced+=copy_plane_to_surface (0,d_chunk_size, src_pixels_0);
 244       src_pixels_0 += d_chunk_size;
 245       src_pixels_1 += d_chunk_size;
 246       src_pixels_2 += d_chunk_size;
 247     }
 248     break;
 249   case 2:
 250     if(1) //if(pixel_interleaved_uv)
 251     {
 252       // first channel=Y, second channel is alternating pixels U and V
 253       src_pixels_0 = (unsigned char *) input_items[0];
 254       src_pixels_1 = (unsigned char *) input_items[1];
 255       for (int i = 0; i < noutput_items; i += d_chunk_size){
 256         copy_plane_to_surface (12,d_chunk_size/2, src_pixels_1);
 257         noutput_items_produced+=copy_plane_to_surface (0,d_chunk_size, src_pixels_0);
 258         src_pixels_0 += d_chunk_size;
 259         src_pixels_1 += d_chunk_size;
 260       }
 261     } else
 262     {
 263       // first channel=Y, second channel is alternating lines U and V
 264       src_pixels_0 = (unsigned char *) input_items[0];
 265       src_pixels_1 = (unsigned char *) input_items[1];
 266       for (int i = 0; i < noutput_items; i += d_chunk_size){
 267         copy_plane_to_surface (1222,d_chunk_size/2, src_pixels_1);
 268         noutput_items_produced+=copy_plane_to_surface (0,d_chunk_size, src_pixels_0);
 269         src_pixels_0 += d_chunk_size;
 270         src_pixels_1 += d_chunk_size;
 271       }
 272     }
 273     break;
 274   case 1:               // grey (Y) input
 275     /* Y component */
 276     plane=0;
 277     src_pixels_0 = (unsigned char *) input_items[plane];
 278     for (int i = 0; i < noutput_items; i += d_chunk_size){
 279       noutput_items_produced+=copy_plane_to_surface (plane,d_chunk_size, src_pixels_0);
 280       src_pixels_0 += d_chunk_size;
 281     }
 282     break;
 283   default: //0 or more then 3 channels
 284      std::cerr << "video_sdl_sink_uc: Wrong number of channels: ";
 285      std::cerr <<"1, 2 or 3 channels are supported.\n  Requested number of channels is "<< input_items.size () <<"\n";
 286     throw std::runtime_error ("video_sdl_sink_uc");
 287   }
 288
 289   SDL_UnlockYUVOverlay( d_image );
 290   return noutput_items_produced;
 291 }