--- /dev/null
+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <sys/time.h>
+#define DEBUG_ENABLED
+#include <gstclock.h>
+
+static GstClock *the_system_clock = NULL;
+static int num;
+
+/**
+ * gst_clock_new:
+ * @name: the name of the new clock
+ *
+ * create a new clock element
+ *
+ * Returns: the new clock element
+ */
+GstClock *gst_clock_new(gchar *name) {
+ GstClock *clock = (GstClock *) g_malloc(sizeof(GstClock));
+ clock->name = g_strdup(name);
+ clock->sinkobjects = NULL;
+ clock->sinkmutex = g_mutex_new();
+ clock->lock = g_mutex_new();
+ g_mutex_lock(clock->sinkmutex);
+ num =0;
+ clock->locking = TRUE;
+ return clock;
+}
+
+GstClock *gst_clock_get_system() {
+ if (the_system_clock == NULL) {
+ the_system_clock = gst_clock_new("system_clock");
+ gst_clock_reset(the_system_clock);
+ }
+ return the_system_clock;
+}
+
+void gst_clock_register(GstClock *clock, GstObject *obj) {
+ if (GST_IS_SINK(obj)) {
+ DEBUG("gst_clock: registered sink object 0x%p\n", obj);
+ clock->sinkobjects = g_list_append(clock->sinkobjects, obj);
+ num++;
+ }
+}
+
+void gst_clock_set(GstClock *clock, GstClockTime time) {
+ struct timeval tfnow;
+ GstClockTime target, now;
+
+ g_mutex_lock(clock->lock);
+ gettimeofday(&tfnow, (struct timezone *)NULL);
+ now = tfnow.tv_sec*1000000+tfnow.tv_usec;
+ clock->adjust = now - (clock->start_time + time);
+ clock->current_time = (clock->start_time + time);
+ //DEBUG("gst_clock: setting clock to %llu %llu %lld\n", (guint64)clock->start_time+time, (guint64)now, (gint64)clock->adjust);
+ g_mutex_unlock(clock->lock);
+}
+
+void gst_clock_reset(GstClock *clock) {
+ struct timeval tfnow;
+
+ gettimeofday(&tfnow, (struct timezone *)NULL);
+ clock->start_time = tfnow.tv_sec*1000000+tfnow.tv_usec;
+ clock->current_time = clock->start_time;
+ clock->adjust = 0LL;
+ DEBUG("gst_clock: setting start clock %llu\n", clock->start_time);
+}
+
+void gst_clock_wait(GstClock *clock, GstClockTime time, GstObject *obj) {
+ struct timeval tfnow;
+ GstClockTime target, now;
+ GstClockTimeDiff diff;
+ GList *elements;
+
+ g_mutex_lock(clock->lock);
+ elements = clock->sinkobjects;
+ while (elements && clock->locking) {
+ if (elements->data == obj) {
+ DEBUG("gst_clock: registered sink object 0x%p\n", obj);
+ num--;
+ if (num) {
+ DEBUG("gst_clock: 0x%p locked\n", obj);
+ g_mutex_unlock(clock->lock);
+ g_mutex_lock(clock->sinkmutex);
+ g_mutex_lock(clock->lock);
+ clock->locking = FALSE;
+ }
+ else {
+ DEBUG("gst_clock: unlock all %p\n", obj);
+ gst_clock_reset(clock);
+ g_mutex_unlock(clock->sinkmutex);
+ clock->locking = FALSE;
+ }
+ break;
+ }
+ elements = g_list_next(elements);
+ }
+
+ target = clock->start_time + time;
+ gettimeofday(&tfnow, (struct timezone *)NULL);
+ now = tfnow.tv_sec*1000000+tfnow.tv_usec + clock->adjust;
+ //now = clock->current_time + clock->adjust;
+
+ //DEBUG("gst_clock: 0x%p waiting for time %llu %llu\n", obj, time, target);
+
+ diff = GST_CLOCK_DIFF(target, now);
+ // if we are not behind wait a bit
+
+ if (diff > 1000 ) {
+ tfnow.tv_usec = diff % 1000000;
+ tfnow.tv_sec = diff / 1000000;
+ // FIXME, this piece of code does not work with egcs optimisations on, had to use the following line
+ if (tfnow.tv_sec) fprintf(stderr, "gst_clock: waiting %u %llu %llu %llu seconds\n", (int)tfnow.tv_sec, now, diff, target);
+ g_mutex_unlock(clock->lock);
+ //DEBUG("gst_clock: 0x%p waiting for time %llu %llu %lld %llu\n", obj, time, target, diff, now);
+ select(0, NULL, NULL, NULL, &tfnow);
+ //DEBUG("gst_clock: 0x%p waiting done time %llu %llu\n", obj, time, target);
+ g_mutex_lock(clock->lock);
+ }
+ // clock->current_time = clock->start_time + time;
+ g_mutex_unlock(clock->lock);
+ //gst_clock_set(clock, time);
+
+}
--- /dev/null
+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#ifndef __GST_CLOCK_H__
+#define __GST_CLOCK_H__
+
+
+#include <gst/gst.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+typedef guint64 GstClockTime;
+typedef gint64 GstClockTimeDiff;
+
+#define GST_CLOCK_DIFF(s, e) (GstClockTimeDiff)((s)-(e))
+
+typedef struct _GstClock GstClock;
+
+struct _GstClock {
+ gchar *name;
+ GstClockTime start_time;
+ GstClockTime current_time;
+ GstClockTimeDiff adjust;
+ gboolean locking;
+ GList *sinkobjects;
+ GMutex *sinkmutex;
+ GMutex *lock;
+};
+
+GstClock *gst_clock_new(gchar *name);
+GstClock *gst_clock_get_system(void);
+
+void gst_clock_register(GstClock *clock, GstObject *obj);
+void gst_clock_set(GstClock *clock, GstClockTime time);
+void gst_clock_reset(GstClock *clock);
+void gst_clock_wait(GstClock *clock, GstClockTime time, GstObject *obj);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GST_CLOCK_H__ */