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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 3, 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_s.h>
  30 #include <gr_io_signature.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <fcntl.h>
  34 #include <unistd.h>
  35 #include <stdio.h>
  36 #include <iostream>
  37 #include <stdexcept>
  38
  39
  40
  41 video_sdl_sink_s::video_sdl_sink_s (double framerate,int width, int height,unsigned int format,int dst_width,int dst_height)
  42   : gr_sync_block ("video_sdl_sink_s",
  43                    gr_make_io_signature (1, 3, sizeof (short)),
  44                    gr_make_io_signature (0, 0, 0)),
  45     d_chunk_size (width*height),
  46     d_framerate(framerate),
  47     d_wanted_frametime_ms(0),
  48     d_width(width),
  49     d_height (height),
  50     d_dst_width(dst_width),
  51     d_dst_height(dst_height),
  52     d_format(format),
  53     d_current_line(0),
  54     d_screen(NULL),
  55     d_image(NULL),
  56     d_avg_delay(0.0),
  57     d_wanted_ticks(0)
  58 {
  59   if(framerate<=0.0)
  60     d_wanted_frametime_ms=0;//Go as fast as possible
  61   else
  62     d_wanted_frametime_ms=(int)(1000.0/framerate);
  63   if(dst_width<0) d_dst_width=d_width;
  64   if(dst_height<0) d_dst_height=d_height;
  65   if(0==format) d_format=IMGFMT_YV12;
  66
  67   atexit(SDL_Quit);//check if this is the way to do this
  68   if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
  69     std::cerr << "video_sdl_sink_s: Couldn't initialize SDL:" << SDL_GetError() << " \n SDL_Init(SDL_INIT_VIDEO) failed\n";
  70     throw std::runtime_error ("video_sdl_sink_s");
  71   };
  72
  73   /* accept any depth */
  74   d_screen = SDL_SetVideoMode(dst_width, dst_height, 0, SDL_SWSURFACE|SDL_RESIZABLE|SDL_ANYFORMAT);//SDL_DOUBLEBUF |SDL_SWSURFACE| SDL_HWSURFACE||SDL_FULLSCREEN
  75   if ( d_screen == NULL ) {
  76     std::cerr << "Unable to set SDL video mode: " << SDL_GetError() <<"\n SDL_SetVideoMode() Failed \n";
  77     exit(1);
  78   }
  79   if ( d_image ) {
  80       SDL_FreeYUVOverlay(d_image);
  81     }
  82   /* Initialize and create the YUV Overlay used for video out */
  83   if (!(d_image = SDL_CreateYUVOverlay (d_width, d_height, SDL_YV12_OVERLAY, d_screen))) {
  84     std::cerr << "SDL: Couldn't create a YUV overlay: \n"<< SDL_GetError() <<"\n";
  85     throw std::runtime_error ("video_sdl_sink_s");
  86   }
  87
  88   printf("SDL screen_mode %d bits-per-pixel\n",
  89          d_screen->format->BitsPerPixel);
  90   printf("SDL overlay_mode %i \n",
  91          d_image->format);
  92   d_chunk_size = std::min(1,16384/width); //width*16;
  93   d_chunk_size = d_chunk_size*width;
  94   //d_chunk_size = (int) (width);
  95   set_output_multiple (d_chunk_size);
  96   /* Set the default playback area */
  97   d_dst_rect.x = 0;
  98   d_dst_rect.y = 0;
  99   d_dst_rect.w = d_dst_width;
 100   d_dst_rect.h = d_dst_height;
 101   //clear the surface to grey
 102   if ( SDL_LockYUVOverlay( d_image ) ) {
 103     std::cerr << "SDL: Couldn't lock YUV overlay: \n"<< SDL_GetError() <<"\n";
 104     throw std::runtime_error ("video_sdl_sink_s");
 105   }
 106   memset(d_image->pixels[0], 128, d_image->pitches[0]*d_height);
 107   memset(d_image->pixels[1], 128, d_image->pitches[1]*d_height/2);
 108   memset(d_image->pixels[2], 128, d_image->pitches[2]*d_height/2);
 109   SDL_UnlockYUVOverlay( d_image );
 110 }
 111
 112 video_sdl_sink_s::~video_sdl_sink_s ()
 113 {
 114   SDL_Quit();
 115 }
 116
 117 video_sdl_sink_s_sptr
 118 video_sdl_make_sink_s (double framerate,int width, int height,unsigned int format,int dst_width,int dst_height)
 119 {
 120   return video_sdl_sink_s_sptr (new video_sdl_sink_s (framerate, width, height,format,dst_width,dst_height));
 121 }
 122
 123 void
 124 video_sdl_sink_s::copy_line_pixel_interleaved(unsigned char *dst_pixels_u,unsigned char *dst_pixels_v,const short * src_pixels,int src_width)
 125 {
 126   for(int i=0;i<src_width;i++)
 127   {
 128     dst_pixels_u[i]=(unsigned char)src_pixels[i*2];
 129     dst_pixels_v[i]=(unsigned char)src_pixels[i*2+1];
 130   }
 131   return;
 132 }
 133
 134 void
 135 video_sdl_sink_s::copy_line_line_interleaved(unsigned char *dst_pixels_u,unsigned char *dst_pixels_v,const short * src_pixels,int src_width)
 136 {
 137   for(int i=0;i<src_width;i++)
 138   {
 139     dst_pixels_u[i]=(unsigned char)src_pixels[i];
 140     dst_pixels_v[i]=(unsigned char)src_pixels[i+src_width];
 141   }
 142   for(int i=src_width;i<src_width*2;i++)
 143   {
 144     dst_pixels_v[i]=(unsigned char)src_pixels[i];
 145   }
 146   return;
 147 }
 148 void
 149 video_sdl_sink_s::copy_line_single_plane(unsigned char *dst_pixels,const short * src_pixels,int src_width)
 150 {
 151   for(int i=0;i<src_width;i++)
 152   {
 153     dst_pixels[i]=(unsigned char)src_pixels[i];
 154   }
 155   return;
 156 }
 157
 158 void
 159 video_sdl_sink_s::copy_line_single_plane_dec2(unsigned char *dst_pixels,const short * src_pixels,int src_width)
 160 {
 161   for(int i=0,j=0;i<src_width;i+=2,j++)
 162   {
 163     dst_pixels[j]=(unsigned char)src_pixels[i];
 164   }
 165   return;
 166 }
 167
 168 int
 169 video_sdl_sink_s::copy_plane_to_surface (int plane,int noutput_items,
 170                       const short * src_pixels)
 171 {
 172     const int first_dst_plane=(12==plane ||1122==plane)?1:plane;
 173     const int second_dst_plane=(12==plane ||1122==plane)?2:plane;
 174     int current_line=(0==plane)?d_current_line:d_current_line/2;
 175     unsigned char * dst_pixels = (unsigned char *)d_image->pixels[first_dst_plane];
 176     dst_pixels=&dst_pixels[current_line*d_image->pitches[first_dst_plane]];
 177     unsigned char * dst_pixels_2 = (unsigned char *)d_image->pixels[second_dst_plane];
 178     dst_pixels_2=&dst_pixels_2[current_line*d_image->pitches[second_dst_plane]];
 179     int src_width=(0==plane || 12==plane || 1122==plane)?d_width:d_width/2;
 180     int noutput_items_produced=0;
 181     int max_height=(0==plane)?d_height-1:d_height/2-1;
 182     for (int i = 0; i < noutput_items; i += src_width){
 183         //output one line at a time
 184         if(12==plane)
 185         {
 186           copy_line_pixel_interleaved(dst_pixels,dst_pixels_2,src_pixels,src_width);
 187           dst_pixels_2 += d_image->pitches[second_dst_plane];
 188         }
 189         else if (1122==plane)
 190           {
 191             copy_line_line_interleaved(dst_pixels,dst_pixels_2,src_pixels,src_width);
 192             dst_pixels_2 += d_image->pitches[second_dst_plane];
 193             src_pixels += src_width;
 194           }
 195         else if (0==plane)
 196           copy_line_single_plane(dst_pixels,src_pixels,src_width);
 197         else /* 1==plane || 2==plane*/
 198           copy_line_single_plane_dec2(dst_pixels,src_pixels,src_width);//decimate by two horizontally
 199
 200         src_pixels += src_width;
 201         dst_pixels += d_image->pitches[first_dst_plane];
 202         noutput_items_produced+=src_width;
 203         current_line++;
 204         if (current_line>max_height)
 205         {
 206           //Start new frame
 207           //TODO, do this all in a seperate thread
 208           current_line=0;
 209           dst_pixels=d_image->pixels[first_dst_plane];
 210           dst_pixels_2=d_image->pixels[second_dst_plane];
 211           if(0==plane)
 212           {
 213             SDL_DisplayYUVOverlay(d_image, &d_dst_rect);
 214             //SDL_Flip(d_screen);
 215             unsigned int ticks=SDL_GetTicks();//milliseconds
 216             d_wanted_ticks+=d_wanted_frametime_ms;
 217             float avg_alpha=0.1;
 218             int time_diff=d_wanted_ticks-ticks;
 219             d_avg_delay=time_diff*avg_alpha +d_avg_delay*(1.0-avg_alpha);
 220           }
 221         }
 222       }
 223     if(0==plane) d_current_line=current_line;
 224   return noutput_items_produced;
 225 }
 226
 227 int
 228 video_sdl_sink_s::work (int noutput_items,
 229                       gr_vector_const_void_star &input_items,
 230                       gr_vector_void_star &output_items)
 231 {
 232   short *src_pixels_0,*src_pixels_1,*src_pixels_2;
 233   int noutput_items_produced=0;
 234   int plane;
 235   int delay=(int)d_avg_delay;
 236   if(0==d_wanted_ticks)
 237     d_wanted_ticks=SDL_GetTicks();
 238   if(delay>0)
 239     SDL_Delay((unsigned int)delay);//compensate if running too fast
 240
 241   if ( SDL_LockYUVOverlay( d_image ) ) {
 242     return 0;
 243   }
 244   switch (input_items.size ()){
 245   case 3:               // first channel=Y, second channel is  U , third channel is V
 246     src_pixels_0 = (short *) input_items[0];
 247     src_pixels_1 = (short *) input_items[1];
 248     src_pixels_2 = (short *) input_items[2];
 249     for (int i = 0; i < noutput_items; i += d_chunk_size){
 250       copy_plane_to_surface (1,d_chunk_size, src_pixels_1);
 251       copy_plane_to_surface (2,d_chunk_size, src_pixels_2);
 252       noutput_items_produced+=copy_plane_to_surface (0,d_chunk_size, src_pixels_0);
 253       src_pixels_0 += d_chunk_size;
 254       src_pixels_1 += d_chunk_size;
 255       src_pixels_2 += d_chunk_size;
 256     }
 257     break;
 258   case 2:
 259     if(1) //if(pixel_interleaved_uv)
 260     {
 261       // first channel=Y, second channel is alternating pixels U and V
 262       src_pixels_0 = (short *) input_items[0];
 263       src_pixels_1 = (short *) input_items[1];
 264       for (int i = 0; i < noutput_items; i += d_chunk_size){
 265         copy_plane_to_surface (12,d_chunk_size/2, src_pixels_1);
 266         noutput_items_produced+=copy_plane_to_surface (0,d_chunk_size, src_pixels_0);
 267         src_pixels_0 += d_chunk_size;
 268         src_pixels_1 += d_chunk_size;
 269       }
 270     } else
 271     {
 272       // first channel=Y, second channel is alternating lines U and V
 273       src_pixels_0 = (short *) input_items[0];
 274       src_pixels_1 = (short *) input_items[1];
 275       for (int i = 0; i < noutput_items; i += d_chunk_size){
 276         copy_plane_to_surface (1222,d_chunk_size/2, src_pixels_1);
 277         noutput_items_produced+=copy_plane_to_surface (0,d_chunk_size, src_pixels_0);
 278         src_pixels_0 += d_chunk_size;
 279         src_pixels_1 += d_chunk_size;
 280       }
 281     }
 282     break;
 283   case 1:               // grey (Y) input
 284     /* Y component */
 285     plane=0;
 286     src_pixels_0 = (short *) input_items[plane];
 287     for (int i = 0; i < noutput_items; i += d_chunk_size){
 288       noutput_items_produced+=copy_plane_to_surface (plane,d_chunk_size, src_pixels_0);
 289       src_pixels_0 += d_chunk_size;
 290     }
 291     break;
 292   default: //0 or more then 3 channels
 293      std::cerr << "video_sdl_sink_s: Wrong number of channels: ";
 294      std::cerr <<"1, 2 or 3 channels are supported.\n  Requested number of channels is "<< input_items.size () <<"\n";
 295     throw std::runtime_error ("video_sdl_sink_s");
 296   }
 297
 298   SDL_UnlockYUVOverlay( d_image );
 299   return noutput_items_produced;
 300 }