fifo.c

   1 #include "input/mouse.h"
   2
   3
   4 int key_fifo_size = 7;
   5 static int *key_fifo_data = NULL;
   6 static int key_fifo_read=0;
   7 static int key_fifo_write=0;
   8
   9 static void mplayer_put_key_internal(int code){
  10   int fifo_free = key_fifo_read - key_fifo_write - 1;
  11   if (fifo_free < 0) fifo_free += key_fifo_size;
  12 //  printf("mplayer_put_key(%d)\n",code);
  13   if (key_fifo_data == NULL)
  14     key_fifo_data = malloc(key_fifo_size * sizeof(int));
  15   if(!fifo_free) return; // FIFO FULL!!
  16   // reserve some space for key release events to avoid stuck keys
  17   if((code & MP_KEY_DOWN) && fifo_free < (key_fifo_size >> 1))
  18     return;
  19   key_fifo_data[key_fifo_write]=code;
  20   key_fifo_write=(key_fifo_write+1)%key_fifo_size;
  21 }
  22
  23 int mplayer_get_key(int fd){
  24   int key;
  25 //  printf("mplayer_get_key(%d)\n",fd);
  26   if (key_fifo_data == NULL)
  27     return MP_INPUT_NOTHING;
  28   if(key_fifo_write==key_fifo_read) return MP_INPUT_NOTHING;
  29   key=key_fifo_data[key_fifo_read];
  30   key_fifo_read=(key_fifo_read+1)%key_fifo_size;
  31 //  printf("mplayer_get_key => %d\n",key);
  32   return key;
  33 }
  34
  35
  36 static unsigned doubleclick_time = 300;
  37
  38 static void put_double(int code) {
  39   if (code >= MOUSE_BTN0 && code <= MOUSE_BTN9)
  40     mplayer_put_key_internal(code - MOUSE_BTN0 + MOUSE_BTN0_DBL);
  41 }
  42
  43 void mplayer_put_key(int code) {
  44   static unsigned last_key_time[2];
  45   static int last_key[2];
  46   unsigned now = GetTimerMS();
  47   // ignore system-doubleclick if we generate these events ourselves
  48   if (doubleclick_time &&
  49       (code & ~MP_KEY_DOWN) >= MOUSE_BTN0_DBL &&
  50       (code & ~MP_KEY_DOWN) <= MOUSE_BTN9_DBL)
  51     return;
  52   mplayer_put_key_internal(code);
  53   if (code & MP_KEY_DOWN) {
  54     code &= ~MP_KEY_DOWN;
  55     last_key[1] = last_key[0];
  56     last_key[0] = code;
  57     last_key_time[1] = last_key_time[0];
  58     last_key_time[0] = now;
  59     if (last_key[1] == code &&
  60         now - last_key_time[1] < doubleclick_time)
  61       put_double(code);
  62     return;
  63   }
  64   if (last_key[0] == code && last_key[1] == code &&
  65       now - last_key_time[1] < doubleclick_time)
  66     put_double(code);
  67 }