From 0944709a29b02ffaa8e83140dbd0388d5e152f8f Mon Sep 17 00:00:00 2001
From: reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Mon, 5 Feb 2007 17:51:26 +0000
Subject: [PATCH] Reserve half of fifo for key release events to help avoiding
 stop buttons and remove thus useless hack for mouse wheel.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@22149 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 fifo.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/fifo.c b/fifo.c
index bd9afc54b7..e43f0649e3 100644
--- a/fifo.c
+++ b/fifo.c
@@ -35,16 +35,21 @@ static void mplayer_put_key_internal(int code){
 
 #else
 
-int key_fifo_size = 10;
+int key_fifo_size = 7;
 static int *key_fifo_data = NULL;
 static int key_fifo_read=0;
 static int key_fifo_write=0;
 
 static void mplayer_put_key_internal(int code){
+  int fifo_free = key_fifo_read - key_fifo_write - 1;
+  if (fifo_free < 0) fifo_free += key_fifo_size;
 //  printf("mplayer_put_key(%d)\n",code);
   if (key_fifo_data == NULL)
     key_fifo_data = malloc(key_fifo_size * sizeof(int));
-  if(((key_fifo_write+1)%key_fifo_size)==key_fifo_read) return; // FIFO FULL!!
+  if(!fifo_free) return; // FIFO FULL!!
+  // reserve some space for key release events to avoid stuck keys
+  if((code & MP_KEY_DOWN) && fifo_free < (key_fifo_size >> 1))
+    return;
   key_fifo_data[key_fifo_write]=code;
   key_fifo_write=(key_fifo_write+1)%key_fifo_size;
 }
@@ -79,8 +84,6 @@ void mplayer_put_key(int code) {
       (code & ~MP_KEY_DOWN) >= MOUSE_BTN0_DBL &&
       (code & ~MP_KEY_DOWN) <= MOUSE_BTN9_DBL)
     return;
-  // ignore mouse wheel down events since they can easily get stuck
-  if (code < (MOUSE_BTN3 | MP_KEY_DOWN) || code > (MOUSE_BTN4 | MP_KEY_DOWN))
   mplayer_put_key_internal(code);
   if (code & MP_KEY_DOWN) {
     code &= ~MP_KEY_DOWN;