cinelerra/vdevicev4l2.h

   1 #ifndef VDEVICEV4L2_H
   2 #define VDEVICEV4L2_H
   3
   4
   5 #ifdef HAVE_CONFIG_H
   6 #include "config.h"
   7 #endif
   8 #ifdef HAVE_VIDEO4LINUX2
   9
  10 #include "vdevicebase.h"
  11 #include <linux/types.h>
  12 #include <linux/videodev2.h>
  13 #include "videodevice.inc"
  14 #include "vdevicev4l2.inc"
  15
  16
  17 // Short delay is necessary whenn capturing a lousy source.
  18 //#define BUFFER_TIMEOUT 250000
  19
  20 // Long delay is necessary to avoid losing synchronization due to spurrious
  21 // resets.
  22 #define BUFFER_TIMEOUT 10000000
  23
  24
  25 // Isolate the application from the grabbing operation.
  26 // Used by VDeviceV4L2 and VDeviceV4L2JPEG
  27 // Color_model determines whether it uses compressed mode or not.
  28 class VDeviceV4L2Thread : public Thread
  29 {
  30 public:
  31         VDeviceV4L2Thread(VideoDevice *device, int color_model);
  32         ~VDeviceV4L2Thread();
  33
  34         void start();
  35         void run();
  36         VFrame* get_buffer(int *timed_out);
  37         void put_buffer();
  38         void allocate_buffers(int number);
  39
  40         Mutex *buffer_lock;
  41 // Some of the drivers in 2.6.7 can't handle simultaneous QBUF and DQBUF calls.
  42         Mutex *ioctl_lock;
  43         Condition *video_lock;
  44         VideoDevice *device;
  45         VFrame **device_buffers;
  46         int *buffer_valid;
  47         int total_valid;
  48         int total_buffers;
  49         int current_inbuffer;
  50         int current_outbuffer;
  51 // Don't block if first frame not recieved yet.
  52 // This frees up the GUI during driver initialization.
  53         int first_frame;
  54         int done;
  55         int input_fd;
  56 // COMPRESSED or another color model the device should use.
  57         int color_model;
  58         VDeviceV4L2Put *put_thread;
  59 };
  60
  61
  62 // Another thread which puts back buffers asynchronously of the buffer
  63 // grabber.  Because 2.6.7 drivers block the buffer enqueuer.
  64 class VDeviceV4L2Put : public Thread
  65 {
  66 public:
  67         VDeviceV4L2Put(VDeviceV4L2Thread *thread);
  68         ~VDeviceV4L2Put();
  69         void run();
  70 // Release buffer for capturing.
  71         void put_buffer(int number);
  72         VDeviceV4L2Thread *thread;
  73 // List of buffers to requeue
  74         Mutex *lock;
  75         Condition *more_buffers;
  76         int *putbuffers;
  77         int total;
  78         int done;
  79 };
  80
  81
  82
  83 class VDeviceV4L2 : public VDeviceBase
  84 {
  85 public:
  86         VDeviceV4L2(VideoDevice *device);
  87         ~VDeviceV4L2();
  88
  89         int close_all();
  90         int open_input();
  91         int initialize();
  92         int get_best_colormodel(Asset_GC asset);
  93         int read_buffer(VFrame *frame);
  94         int has_signal();
  95         static int cmodel_to_device(int color_model);
  96         static int get_sources(VideoDevice *device,
  97                 char *path);
  98
  99         VDeviceV4L2Thread *thread;
 100 };
 101
 102 #endif
 103 #endif
 104 /*
 105 //      Local Variables:
 106 //      mode: C++
 107 //      c-file-style: "linux"
 108 //      End:
 109 */