Credit Andrew - improve in-tree documentation
[goodguy/cinelerra.git] / 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