cinelerra-5.0/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
  22 #include "../hvirtual_config.h"
  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 #ifdef HAVE_VIDEO4LINUX2
  32
  33
  34 VDeviceV4L2::VDeviceV4L2(VideoDevice *device)
  35  : VDeviceBase(device), DeviceV4L2Base()
  36 {
  37 }
  38
  39 VDeviceV4L2::~VDeviceV4L2()
  40 {
  41         close_all();
  42 }
  43
  44 int VDeviceV4L2::close_all()
  45 {
  46         close_dev();
  47         return 0;
  48 }
  49
  50 int VDeviceV4L2::open_input()
  51 {
  52         int result = get_sources();
  53         if( !result )
  54         {
  55                 device->channel->use_frequency = 1;
  56                 device->channel->use_fine = 1;
  57         }
  58         return result;
  59 }
  60
  61 int VDeviceV4L2::get_best_colormodel(Asset *asset)
  62 {
  63         int result = // BC_RGB888;
  64                 File::get_best_colormodel(asset, device->in_config->driver);
  65         return result;
  66 }
  67
  68 int VDeviceV4L2::has_signal()
  69 {
  70         return !status_dev() ? dev_signal() : 0;
  71 }
  72
  73 int VDeviceV4L2::read_buffer(VFrame *frame)
  74 {
  75         int result = 0;
  76
  77         if(is_opened())
  78         {
  79                 if(device->channel_changed || device->picture_changed)
  80                         close_dev();
  81         }
  82
  83         if(!is_opened())
  84         {
  85                 result = open_dev(frame->get_color_model());
  86                 if( !result )
  87                 {
  88                         device->channel_changed = 0;
  89                         device->picture_changed = 0;
  90                 }
  91         }
  92
  93 // Get buffer from thread
  94         if( !result )
  95         {
  96                 int bfr = get_buffer();
  97                 if(bfr >= 0)
  98                 {
  99                         VFrame *buffer = device_buffer(bfr);
 100 //printf("VDeviceV4L2::read_buffer %d %p %p\n",
 101 //  __LINE__, frame->get_data(), buffer->get_data());
 102                         frame->copy_from(buffer);
 103                         put_buffer(bfr);
 104                 }
 105                 else
 106                         result = 1;
 107         }
 108
 109         if( result )
 110                 close_dev();
 111
 112         return result;
 113 }
 114
 115 #endif