mp_fifo.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdlib.h>
  20 #include "osdep/timer.h"
  21 #include "input/input.h"
  22 #include "input/mouse.h"
  23 #include "mp_fifo.h"
  24
  25 int key_fifo_size = 7;
  26 static int *key_fifo_data = NULL;
  27 static int key_fifo_read=0;
  28 static int key_fifo_write=0;
  29
  30 static void mplayer_put_key_internal(int code){
  31   int fifo_free = key_fifo_read - key_fifo_write - 1;
  32   if (fifo_free < 0) fifo_free += key_fifo_size;
  33 //  printf("mplayer_put_key(%d)\n",code);
  34   if (key_fifo_data == NULL)
  35     key_fifo_data = malloc(key_fifo_size * sizeof(int));
  36   if(!fifo_free) return; // FIFO FULL!!
  37   // reserve some space for key release events to avoid stuck keys
  38   if((code & MP_KEY_DOWN) && fifo_free < (key_fifo_size >> 1))
  39     return;
  40   key_fifo_data[key_fifo_write]=code;
  41   key_fifo_write=(key_fifo_write+1)%key_fifo_size;
  42 }
  43
  44 int mplayer_get_key(int fd){
  45   int key;
  46 //  printf("mplayer_get_key(%d)\n",fd);
  47   if (key_fifo_data == NULL)
  48     return MP_INPUT_NOTHING;
  49   if(key_fifo_write==key_fifo_read) return MP_INPUT_NOTHING;
  50   key=key_fifo_data[key_fifo_read];
  51   key_fifo_read=(key_fifo_read+1)%key_fifo_size;
  52 //  printf("mplayer_get_key => %d\n",key);
  53   return key;
  54 }
  55
  56
  57 unsigned doubleclick_time = 300;
  58
  59 static void put_double(int code) {
  60   if (code >= MOUSE_BTN0 && code <= MOUSE_BTN9)
  61     mplayer_put_key_internal(code - MOUSE_BTN0 + MOUSE_BTN0_DBL);
  62 }
  63
  64 void mplayer_put_key(int code) {
  65   static unsigned last_key_time[2];
  66   static int last_key[2];
  67   unsigned now = GetTimerMS();
  68   // ignore system-doubleclick if we generate these events ourselves
  69   if (doubleclick_time &&
  70       (code & ~MP_KEY_DOWN) >= MOUSE_BTN0_DBL &&
  71       (code & ~MP_KEY_DOWN) <= MOUSE_BTN9_DBL)
  72     return;
  73   mplayer_put_key_internal(code);
  74   if (code & MP_KEY_DOWN) {
  75     code &= ~MP_KEY_DOWN;
  76     last_key[1] = last_key[0];
  77     last_key[0] = code;
  78     last_key_time[1] = last_key_time[0];
  79     last_key_time[0] = now;
  80     if (last_key[1] == code &&
  81         now - last_key_time[1] < doubleclick_time)
  82       put_double(code);
  83     return;
  84   }
  85   if (last_key[0] == code && last_key[1] == code &&
  86       now - last_key_time[1] < doubleclick_time)
  87     put_double(code);
  88 }