fifo.c

   1
   2 #if 0
   3
   4 // keyboard:
   5 static int keyb_fifo_put=-1;
   6 static int keyb_fifo_get=-1;
   7
   8 static void set_nonblock_flag(int fd) {
   9   int oldflags;
  10
  11   oldflags = fcntl(fd, F_GETFL, 0);
  12   if (oldflags != -1) {
  13     if (fcntl(keyb_fifo_put, F_SETFL, oldflags | O_NONBLOCK) != -1) {
  14        return;
  15     }
  16   }
  17   mp_msg(MSGT_INPUT,MSGL_ERR,"Cannot set nonblocking mode for fd %d!\n", fd);
  18 }
  19
  20 static void make_pipe(int* pr,int* pw){
  21   int temp[2];
  22   if(pipe(temp)!=0) mp_msg(MSGT_FIXME, MSGL_FIXME, MSGTR_CannotMakePipe);
  23   *pr=temp[0];
  24   *pw=temp[1];
  25   set_nonblock_flag(temp[1]);
  26 }
  27
  28 void mplayer_put_key(int code){
  29
  30     if( write(keyb_fifo_put,&code,4) != 4 ){
  31         mp_msg(MSGT_INPUT,MSGL_ERR,"*** key event dropped (FIFO is full) ***\n");
  32     }
  33 }
  34
  35 #else
  36
  37 int key_fifo_size = 10;
  38 static int *key_fifo_data = NULL;
  39 static int key_fifo_read=0;
  40 static int key_fifo_write=0;
  41
  42 void mplayer_put_key(int code){
  43 //  printf("mplayer_put_key(%d)\n",code);
  44   if (key_fifo_data == NULL)
  45     key_fifo_data = malloc(key_fifo_size * sizeof(int));
  46   if(((key_fifo_write+1)%key_fifo_size)==key_fifo_read) return; // FIFO FULL!!
  47   key_fifo_data[key_fifo_write]=code;
  48   key_fifo_write=(key_fifo_write+1)%key_fifo_size;
  49 }
  50
  51 int mplayer_get_key(int fd){
  52   int key;
  53 //  printf("mplayer_get_key(%d)\n",fd);
  54   if (key_fifo_data == NULL)
  55     return MP_INPUT_NOTHING;
  56   if(key_fifo_write==key_fifo_read) return MP_INPUT_NOTHING;
  57   key=key_fifo_data[key_fifo_read];
  58   key_fifo_read=(key_fifo_read+1)%key_fifo_size;
  59 //  printf("mplayer_get_key => %d\n",key);
  60   return key;
  61 }
  62
  63 #endif
  64