cinelerra-5.1/cinelerra/vdevicev4l2.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  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
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21 #ifdef HAVE_VIDEO4LINUX2
  22
  23 #include "channel.h"
  24 #include "file.h"
  25 #include "preferences.h"
  26 #include "recordconfig.h"
  27 #include "vdevicev4l2.h"
  28 #include "vframe.h"
  29 #include "videodevice.h"
  30
  31
  32
  33 VDeviceV4L2::VDeviceV4L2(VideoDevice *device)
  34  : VDeviceBase(device), DeviceV4L2Base()
  35 {
  36 }
  37
  38 VDeviceV4L2::~VDeviceV4L2()
  39 {
  40         close_all();
  41 }
  42
  43 int VDeviceV4L2::close_all()
  44 {
  45         close_dev();
  46         return 0;
  47 }
  48
  49 int VDeviceV4L2::open_input()
  50 {
  51         int result = get_sources();
  52         if( !result )
  53         {
  54                 ArrayList<Channel*> *inputs = device->get_inputs();
  55                 for( int i=0; i<inputs->size(); ++i ) {
  56                         if( inputs->get(i)->tuner ) {
  57                                 device->channel->use_frequency = 1;
  58                                 device->channel->use_fine = 1;
  59                         }
  60                         else
  61                                 device->channel->use_input = 1;
  62                 }
  63         }
  64         return result;
  65 }
  66
  67 int VDeviceV4L2::get_best_colormodel(Asset *asset)
  68 {
  69         int result = // BC_RGB888;
  70                 File::get_best_colormodel(asset, device->in_config->driver);
  71         return result;
  72 }
  73
  74 int VDeviceV4L2::has_signal()
  75 {
  76         return !status_dev() ? dev_signal() : 0;
  77 }
  78
  79 int VDeviceV4L2::read_buffer(VFrame *frame)
  80 {
  81         int result = 0;
  82
  83         if(is_opened())
  84         {
  85                 if(device->channel_changed || device->picture_changed)
  86                         close_dev();
  87         }
  88
  89         if(!is_opened())
  90         {
  91                 result = open_dev(frame->get_color_model());
  92                 if( !result )
  93                 {
  94                         device->channel_changed = 0;
  95                         device->picture_changed = 0;
  96                 }
  97         }
  98
  99 // Get buffer from thread
 100         if( !result )
 101         {
 102                 int bfr = get_buffer();
 103                 if(bfr >= 0)
 104                 {
 105                         VFrame *buffer = device_buffer(bfr);
 106 //printf("VDeviceV4L2::read_buffer %d %p %p\n",
 107 //  __LINE__, frame->get_data(), buffer->get_data());
 108                         frame->transfer_from(buffer);
 109                         put_buffer(bfr);
 110                 }
 111                 else
 112                         result = 1;
 113         }
 114
 115         if( result )
 116                 close_dev();
 117
 118         return result;
 119 }
 120
 121 #endif