GNU Radio 3.5.1 C++ API
video_sdl_sink_uc.h
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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2006 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio
00006  * 
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef INCLUDED_VIDEO_SDL_SINK_UC_H
00024 #define INCLUDED_VIDEO_SDL_SINK_UC_H
00025 
00026 #include <video_sdl_api.h>
00027 #include <gr_sync_block.h>
00028 #include <string>
00029 #include <SDL.h>
00030 
00031 /*  fourcc (four character code) */
00032 #define vid_fourcc(a,b,c,d) (((unsigned)(a)<<0) | ((unsigned)(b)<<8) | ((unsigned)(c)<<16) | ((unsigned)(d)<<24))
00033 #define IMGFMT_YV12  vid_fourcc('Y','V','1','2') /* 12  YVU 4:2:0 */
00034 
00035 class video_sdl_sink_uc;
00036 typedef boost::shared_ptr<video_sdl_sink_uc> video_sdl_sink_uc_sptr;
00037 
00038 VIDEO_SDL_API video_sdl_sink_uc_sptr
00039 video_sdl_make_sink_uc (double framerate,int width=640, int height=480,unsigned int format=IMGFMT_YV12,int dst_width=-1,int dst_height=-1);
00040 
00041 /*!
00042  * \brief video sink using SDL
00043  *
00044  * input signature is one, two or three streams of uchar.
00045  * One stream: stream is grey (Y)
00046  * two streems: first is grey (Y), second is alternating U and V
00047  * Three streams: first is grey (Y), second is U, third is V
00048  * Input samples must be in the range [0,255].
00049  */
00050 
00051 class VIDEO_SDL_API video_sdl_sink_uc : public gr_sync_block {
00052   friend VIDEO_SDL_API video_sdl_sink_uc_sptr
00053   video_sdl_make_sink_uc (double framerate,int width, int height,unsigned int format,int dst_width,int dst_height);
00054 
00055   int           d_chunk_size;
00056 
00057  protected:
00058   video_sdl_sink_uc (double framerate,int width, int height,unsigned int format,
00059                       int dst_width,int dst_height);
00060   void copy_line_pixel_interleaved(unsigned char *dst_pixels_u,unsigned char *dst_pixels_v,
00061                           const unsigned char * src_pixels,int src_width);
00062   void copy_line_line_interleaved(unsigned char *dst_pixels_u,unsigned char *dst_pixels_v,
00063                           const unsigned char * src_pixels,int src_width);
00064   void copy_line_single_plane(unsigned char *dst_pixels,const unsigned char * src_pixels,int src_width);
00065   void copy_line_single_plane_dec2(unsigned char *dst_pixels,const unsigned char * src_pixels,int src_width);
00066   int copy_plane_to_surface (int plane,int noutput_items,
00067                       const unsigned char * src_pixels);
00068   float d_framerate;
00069   int d_wanted_frametime_ms;
00070   int d_width;
00071   int d_height;
00072   int d_dst_width;
00073   int d_dst_height;
00074   int d_format;
00075   int d_current_line;
00076   SDL_Surface *d_screen;
00077   SDL_Overlay *d_image;
00078   SDL_Rect d_dst_rect;
00079   float d_avg_delay;
00080   unsigned int d_wanted_ticks;
00081 
00082 
00083  public:
00084   ~video_sdl_sink_uc ();
00085   
00086   int work (int noutput_items,
00087                   gr_vector_const_void_star &input_items,
00088                   gr_vector_void_star &output_items);
00089 };
00090 
00091 #endif /* INCLUDED_VIDEO_SDL_SINK_UC_H */