1 files changed, 123 insertions, 0 deletions
diff --git a/src/xine-engine/lrb.c b/src/xine-engine/lrb.c
new file mode 100644
index 000000000..dd71ef298
--- /dev/null
+++ b/src/xine-engine/lrb.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2000-2001 the xine project
+ * 
+ * This file is part of xine, a unix video player.
+ * 
+ * xine is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * xine is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+ *
+ * $Id: lrb.c,v 1.1 2001/10/18 18:50:53 guenter Exp $
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <assert.h>
+#include "lrb.h"
+#include "utils.h"
+
+lrb_t *lrb_new (int max_num_entries,
+		fifo_buffer_t *fifo) {
+
+  lrb_t *this;
+  
+  this = xmalloc (sizeof (lrb_t));
+
+  this->max_num_entries = max_num_entries;
+  this->cur_num_entries = 0;
+  this->fifo            = fifo;
+  this->newest          = NULL;
+  this->oldest          = NULL;
+
+  return this;
+}
+
+void lrb_drop (lrb_t *this) {
+  
+  buf_element_t *buf = this->oldest;
+
+  assert (buf);
+
+  this->oldest = buf->next;
+
+  buf->free_buffer (buf);
+
+  this->cur_num_entries--;
+
+}
+
+void lrb_add (lrb_t *this, buf_element_t *buf) {
+
+  if (!this->newest) {
+
+    this->newest  = buf;
+    this->oldest  = buf;
+    buf->next     = NULL;
+
+    this->cur_num_entries = 1;
+
+  } else {
+
+    if (this->cur_num_entries >= this->max_num_entries) 
+      lrb_drop (this);
+
+    buf->next = NULL;
+    this->newest->next = buf;
+    this->newest = buf;
+    this->cur_num_entries++;
+  }
+
+  printf ("lrb: %d elements in buffer\n", this->cur_num_entries);
+
+}
+
+void lrb_feedback (lrb_t *this, fifo_buffer_t *fifo) {
+
+  pthread_mutex_lock (&fifo->mutex);
+
+  while (this->cur_num_entries) {
+
+    buf_element_t *buf = this->oldest;
+
+    buf->next = fifo->first;
+
+    fifo->first = buf;
+
+    if (!fifo->last)
+      fifo->last = buf;
+    
+    fifo->fifo_size++;
+
+    pthread_cond_signal (&fifo->not_empty);
+
+    this->oldest = buf->next;
+
+    this->cur_num_entries--;
+
+    printf ("lrb: feedback\n");
+
+  }
+
+  if (!this->oldest)
+    this->newest = NULL;
+
+  pthread_mutex_unlock (&fifo->mutex);
+}
+
+void lrb_flush (lrb_t *this) {
+  while (this->cur_num_entries) 
+    lrb_drop (this);
+}