cinelerra-5.1/cinelerra/shudmp.C

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <fcntl.h>
   5 #include <error.h>
   6 #include <signal.h>
   7
   8 #include <libusb-1.0/libusb.h>
   9
  10 #define SHUTTLE_INTERFACE 0
  11
  12 libusb_device_handle *devsh = 0;
  13 int claimed = -1;
  14
  15 void usb_done()
  16 {
  17         if( devsh ) {
  18                 if( claimed > 0 ) {
  19                         int sh_iface = SHUTTLE_INTERFACE;
  20                         libusb_release_interface(devsh, sh_iface);
  21                         libusb_attach_kernel_driver(devsh, sh_iface);
  22                         claimed = 0;
  23                 }
  24                 libusb_close(devsh);
  25                 devsh = 0;
  26         }
  27         if( claimed >= 0 ) {
  28                 libusb_exit(0);
  29                 claimed = -1;
  30         }
  31 }
  32
  33 void usb_probe()
  34 {
  35         int ret = libusb_init(0);
  36         if( ret < 0 ) return;
  37         claimed = 0;
  38         devsh = libusb_open_device_with_vid_pid(0, 0x0b33, 0x0030);
  39         if( devsh ) {
  40                 int sh_iface = SHUTTLE_INTERFACE;
  41                 libusb_detach_kernel_driver(devsh, sh_iface);
  42                 ret = libusb_claim_interface(devsh, sh_iface);
  43                 if( ret >= 0 ) claimed = 1;
  44         }
  45         if( !claimed )
  46                 usb_done();
  47 }
  48
  49 int done = 0;
  50 void sigint(int n) { done = 1; }
  51
  52 int main(int ac, char **av)
  53 {
  54         setbuf(stdout, 0);
  55         usb_probe();
  56         if( claimed > 0 ) {
  57                 signal(SIGINT, sigint);
  58                 while( !done ) {
  59                         int len = 0;
  60                         static const int IN_ENDPOINT = 0x81;
  61                         unsigned char dat[5];
  62                         int ret = libusb_interrupt_transfer(devsh,
  63                                         IN_ENDPOINT, dat, sizeof(dat), &len, 100);
  64                         if( ret != 0 ) {
  65                                 if( ret == LIBUSB_ERROR_TIMEOUT ) continue;
  66                                 printf("error: %s\n", libusb_strerror((libusb_error)ret));
  67                                 sleep(1);  continue;
  68                         }
  69                         printf("shuttle: ");
  70                         for( int i=0; i<len; ++i ) printf(" %02x", dat[i]);
  71                         printf("\n");
  72                 }
  73         }
  74         usb_done();
  75         return 0;
  76 }
  77