fifo.c

   1
   2 #ifndef HAVE_NO_POSIX_SELECT
   3
   4 // keyboard:
   5 static int keyb_fifo_put=-1;
   6 static int keyb_fifo_get=-1;
   7
   8 static void make_pipe(int* pr,int* pw){
   9   int temp[2];
  10   if(pipe(temp)!=0) printf("Cannot make PIPE!\n");
  11   *pr=temp[0];
  12   *pw=temp[1];
  13 }
  14
  15 void mplayer_put_key(int code){
  16            fd_set rfds;
  17            struct timeval tv;
  18
  19            /* Watch stdin (fd 0) to see when it has input. */
  20            FD_ZERO(&rfds);
  21            FD_SET(keyb_fifo_put, &rfds);
  22            tv.tv_sec = 0;
  23            tv.tv_usec = 0;
  24
  25            //retval = select(keyb_fifo_put+1, &rfds, NULL, NULL, &tv);
  26            if(select(keyb_fifo_put+1, NULL, &rfds, NULL, &tv)>0){
  27              write(keyb_fifo_put,&code,4);
  28 //             printf("*** key event %d sent ***\n",code);
  29            } else {
  30 //             printf("*** key event dropped (FIFO is full) ***\n");
  31            }
  32 }
  33
  34 #else
  35
  36 #define KEY_FIFO_SIZE 1024
  37 static int key_fifo_data[KEY_FIFO_SIZE];
  38 static int key_fifo_read=0;
  39 static int key_fifo_write=0;
  40
  41 void mplayer_put_key(int code){
  42 //  printf("mplayer_put_key(%d)\n",code);
  43   if(((key_fifo_write+1)%KEY_FIFO_SIZE)==key_fifo_read) return; // FIFO FULL!!
  44   key_fifo_data[key_fifo_write]=code;
  45   key_fifo_write=(key_fifo_write+1)%KEY_FIFO_SIZE;
  46 }
  47
  48 int mplayer_get_key(int fd){
  49   int key;
  50 //  printf("mplayer_get_key(%d)\n",fd);
  51   if(key_fifo_write==key_fifo_read) return MP_INPUT_NOTHING;
  52   key=key_fifo_data[key_fifo_read];
  53   key_fifo_read=(key_fifo_read+1)%KEY_FIFO_SIZE;
  54 //  printf("mplayer_get_key => %d\n",key);
  55   return key;
  56 }
  57
  58 #endif
  59