1 files changed, 142 insertions, 0 deletions
diff --git a/src/input/strict_scr.c b/src/input/strict_scr.c
new file mode 100644
index 000000000..ba045418e
--- /dev/null
+++ b/src/input/strict_scr.c
@@ -0,0 +1,142 @@
+/* 
+ * Copyright (C) 2002 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: strict_scr.c,v 1.1 2002/01/10 21:42:50 guenter Exp $
+ *
+ * scr plugin that may not allow others to adjust it (used for streaming)
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+
+#include "xine_internal.h"
+#include "strict_scr.h"
+
+static int strictscr_get_priority (scr_plugin_t *scr) {
+  return 100; /* very high priority */
+}
+
+/* Only call this when already mutex locked */
+static void strictscr_set_pivot (strictscr_t *this) {
+
+  struct   timeval tv;
+  uint32_t pts;
+  double   pts_calc; 
+
+  gettimeofday(&tv, NULL);
+  pts_calc = (tv.tv_sec  - this->cur_time.tv_sec) * this->speed_factor;
+  pts_calc += (tv.tv_usec - this->cur_time.tv_usec) * this->speed_factor / 1e6;
+  pts = this->cur_pts + pts_calc;
+
+/* This next part introduces a one off inaccuracy 
+ * to the scr due to rounding tv to pts. 
+ */
+  this->cur_time.tv_sec=tv.tv_sec;
+  this->cur_time.tv_usec=tv.tv_usec;
+  this->cur_pts=pts; 
+
+  return ;
+}
+
+static int strictscr_set_speed (scr_plugin_t *scr, int speed) {
+  strictscr_t *this = (strictscr_t*) scr;
+
+  pthread_mutex_lock (&this->lock);
+
+  strictscr_set_pivot( this );
+  this->speed_factor = (double) speed * 90000.0 / 4.0;
+
+  pthread_mutex_unlock (&this->lock);
+
+  return speed;
+}
+
+static void strictscr_adjust (scr_plugin_t *scr, uint32_t vpts) {
+
+  strictscr_t *this = (strictscr_t*) scr;
+  struct   timeval tv;
+
+  if (this->adjustable) {
+
+    pthread_mutex_lock (&this->lock);
+    
+    gettimeofday(&tv, NULL);
+    this->cur_time.tv_sec=tv.tv_sec;
+    this->cur_time.tv_usec=tv.tv_usec;
+    this->cur_pts = vpts;
+    
+    pthread_mutex_unlock (&this->lock);
+  }
+}
+
+static void strictscr_start (scr_plugin_t *scr, uint32_t start_vpts) {
+  strictscr_t *this = (strictscr_t*) scr;
+
+  pthread_mutex_lock (&this->lock);
+
+  gettimeofday(&this->cur_time, NULL);
+  this->cur_pts = start_vpts;
+
+  pthread_mutex_unlock (&this->lock);
+}
+
+static uint32_t strictscr_get_current (scr_plugin_t *scr) {
+  strictscr_t *this = (strictscr_t*) scr;
+
+  struct   timeval tv;
+  uint32_t pts;
+  double   pts_calc; 
+  pthread_mutex_lock (&this->lock);
+
+  gettimeofday(&tv, NULL);
+  
+  pts_calc = (tv.tv_sec  - this->cur_time.tv_sec) * this->speed_factor;
+  pts_calc += (tv.tv_usec - this->cur_time.tv_usec) * this->speed_factor / 1e6;
+
+  pts = this->cur_pts + pts_calc;
+  
+  pthread_mutex_unlock (&this->lock);
+
+  return pts;
+}
+
+strictscr_t* strictscr_init () {
+  strictscr_t *this;
+
+  this = malloc(sizeof(*this));
+  memset(this, 0, sizeof(*this));
+  
+  this->scr.interface_version = 2;
+  this->scr.get_priority      = strictscr_get_priority;
+  this->scr.set_speed         = strictscr_set_speed;
+  this->scr.adjust            = strictscr_adjust;
+  this->scr.start             = strictscr_start;
+  this->scr.get_current       = strictscr_get_current;
+  strictscr_set_speed (&this->scr, SPEED_NORMAL);
+
+  this->adjustable            = 0;
+
+  pthread_mutex_init (&this->lock, NULL);
+
+  return this;
+}
+