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-rw-r--r--examples/seeking/cdplayer.c310
1 files changed, 310 insertions, 0 deletions
diff --git a/examples/seeking/cdplayer.c b/examples/seeking/cdplayer.c
new file mode 100644
index 00000000..a833c67a
--- /dev/null
+++ b/examples/seeking/cdplayer.c
@@ -0,0 +1,310 @@
+#include <stdlib.h>
+#include <glib.h>
+#include <gtk/gtk.h>
+#include <gst/gst.h>
+#include <string.h>
+
+static GList *seekable_elements = NULL;
+
+static GstElement *pipeline;
+static GtkAdjustment *adjustment;
+static gboolean stats = FALSE;
+static guint64 duration;
+
+static guint update_id;
+
+//#define SOURCE "gnomevfssrc"
+#define SOURCE "filesrc"
+
+#define UPDATE_INTERVAL 500
+
+static GstElement*
+make_cdaudio_pipeline (gboolean thread)
+{
+ GstElement *pipeline;
+ GstElement *cdaudio;
+
+ if (thread) {
+ pipeline = gst_thread_new ("app");
+ }
+ else {
+ pipeline = gst_pipeline_new ("app");
+ }
+
+ cdaudio = gst_element_factory_make ("cdaudio", "cdaudio");
+
+ gst_bin_add (GST_BIN (pipeline), cdaudio);
+
+ seekable_elements = g_list_prepend (seekable_elements, cdaudio);
+
+ return pipeline;
+}
+
+static gchar*
+format_value (GtkScale *scale,
+ gdouble value)
+{
+ gint64 real;
+ gint64 seconds;
+ gint64 subseconds;
+
+ real = value * duration / 100;
+ seconds = (gint64) real / GST_SECOND;
+ subseconds = (gint64) real / (GST_SECOND / 100);
+
+ return g_strdup_printf ("%02lld:%02lld:%02lld",
+ seconds/60,
+ seconds%60,
+ subseconds%100);
+}
+
+typedef struct
+{
+ const gchar *name;
+ const GstFormat format;
+} seek_format;
+
+static seek_format seek_formats[] =
+{
+ { "tim", GST_FORMAT_TIME },
+ { "byt", GST_FORMAT_BYTES },
+ { "unt", GST_FORMAT_UNITS },
+ { "buf", GST_FORMAT_BUFFERS },
+ { "def", GST_FORMAT_DEFAULT },
+ { NULL, 0 },
+};
+
+
+G_GNUC_UNUSED static void
+query_durations ()
+{
+ GList *walk = seekable_elements;
+
+ while (walk) {
+ GstElement *element = GST_ELEMENT (walk->data);
+ gint i = 0;
+
+ g_print ("durations %8.8s: ", GST_ELEMENT_NAME (element));
+ while (seek_formats[i].name) {
+ gboolean res;
+ gint64 value;
+ GstFormat format;
+
+ format = seek_formats[i].format;
+ res = gst_element_query (element, GST_PAD_QUERY_TOTAL, &format, &value);
+ if (res) {
+ g_print ("%s %13lld | ", seek_formats[i].name, value);
+ }
+ else {
+ g_print ("%s %13.13s | ", seek_formats[i].name, "*NA*");
+ }
+ i++;
+ }
+ g_print (" %s\n", GST_ELEMENT_NAME (element));
+ walk = g_list_next (walk);
+ }
+}
+
+G_GNUC_UNUSED static void
+query_positions ()
+{
+ GList *walk = seekable_elements;
+
+ while (walk) {
+ GstElement *element = GST_ELEMENT (walk->data);
+ gint i = 0;
+
+ g_print ("positions %8.8s: ", GST_ELEMENT_NAME (element));
+ while (seek_formats[i].name) {
+ gboolean res;
+ gint64 value;
+ GstFormat format;
+
+ format = seek_formats[i].format;
+ res = gst_element_query (element, GST_PAD_QUERY_POSITION, &format, &value);
+ if (res) {
+ g_print ("%s %13lld | ", seek_formats[i].name, value);
+ }
+ else {
+ g_print ("%s %13.13s | ", seek_formats[i].name, "*NA*");
+ }
+ i++;
+ }
+ g_print (" %s\n", GST_ELEMENT_NAME (element));
+ walk = g_list_next (walk);
+ }
+}
+
+static gboolean
+update_scale (gpointer data)
+{
+ GstClock *clock;
+ guint64 position;
+ GstFormat format = GST_FORMAT_TIME;
+
+ duration = 0;
+ clock = gst_bin_get_clock (GST_BIN (pipeline));
+
+ if (seekable_elements) {
+ GstElement *element = GST_ELEMENT (seekable_elements->data);
+ gst_element_query (element, GST_PAD_QUERY_TOTAL, &format, &duration);
+ }
+ position = gst_clock_get_time (clock);
+
+ if (stats) {
+ g_print ("clock: %13llu (%s)\n", position, gst_object_get_name (GST_OBJECT (clock)));
+ query_durations ();
+ query_positions ();
+ }
+ if (duration > 0) {
+ gtk_adjustment_set_value (adjustment, position * 100.0 / duration);
+ }
+
+ return TRUE;
+}
+
+static gboolean
+iterate (gpointer data)
+{
+ gboolean res = TRUE;
+
+ res = gst_bin_iterate (GST_BIN (data));
+ if (!res) {
+ gtk_timeout_remove (update_id);
+ g_print ("stopping iterations\n");
+ }
+ return res;
+}
+
+static gboolean
+start_seek (GtkWidget *widget, GdkEventButton *event, gpointer user_data)
+{
+ gst_element_set_state (pipeline, GST_STATE_PAUSED);
+ gtk_timeout_remove (update_id);
+
+ return FALSE;
+}
+
+static gboolean
+stop_seek (GtkWidget *widget, GdkEventButton *event, gpointer user_data)
+{
+ gint64 real = gtk_range_get_value (GTK_RANGE (widget)) * duration / 100;
+ gboolean res;
+ GstEvent *s_event;
+ GList *walk = seekable_elements;
+
+ while (walk) {
+ GstElement *seekable = GST_ELEMENT (walk->data);
+
+ g_print ("seek to %lld on element %s\n", real, GST_ELEMENT_NAME (seekable));
+ s_event = gst_event_new_seek (GST_FORMAT_TIME |
+ GST_SEEK_METHOD_SET |
+ GST_SEEK_FLAG_FLUSH, real);
+
+ res = gst_element_send_event (seekable, s_event);
+
+ walk = g_list_next (walk);
+ }
+
+ gst_element_set_state (pipeline, GST_STATE_PLAYING);
+ if (!GST_FLAG_IS_SET (pipeline, GST_BIN_SELF_SCHEDULABLE))
+ gtk_idle_add ((GtkFunction) iterate, pipeline);
+ update_id = gtk_timeout_add (UPDATE_INTERVAL, (GtkFunction) update_scale, pipeline);
+
+ return FALSE;
+}
+
+static void
+play_cb (GtkButton * button, gpointer data)
+{
+ if (gst_element_get_state (pipeline) != GST_STATE_PLAYING) {
+ gst_element_set_state (pipeline, GST_STATE_PLAYING);
+ if (!GST_FLAG_IS_SET (pipeline, GST_BIN_SELF_SCHEDULABLE))
+ gtk_idle_add ((GtkFunction) iterate, pipeline);
+ update_id = gtk_timeout_add (UPDATE_INTERVAL, (GtkFunction) update_scale, pipeline);
+ }
+}
+
+static void
+pause_cb (GtkButton * button, gpointer data)
+{
+ if (gst_element_get_state (pipeline) != GST_STATE_PAUSED) {
+ gst_element_set_state (pipeline, GST_STATE_PAUSED);
+ gtk_timeout_remove (update_id);
+ }
+}
+
+static void
+stop_cb (GtkButton * button, gpointer data)
+{
+ if (gst_element_get_state (pipeline) != GST_STATE_READY) {
+ gst_element_set_state (pipeline, GST_STATE_READY);
+ gtk_timeout_remove (update_id);
+ }
+}
+
+int
+main (int argc, char **argv)
+{
+ GtkWidget *window, *hbox, *vbox,
+ *play_button, *pause_button, *stop_button,
+ *hscale;
+ gboolean threaded = FALSE;
+ struct poptOption options[] = {
+ {"threaded", 't', POPT_ARG_NONE|POPT_ARGFLAG_STRIP, &threaded, 0,
+ "Run the pipeline in a toplevel thread", NULL},
+ {"stats", 's', POPT_ARG_NONE|POPT_ARGFLAG_STRIP, &stats, 0,
+ "Show element stats", NULL},
+ POPT_TABLEEND
+ };
+
+ gst_init_with_popt_table (&argc, &argv, options);
+ gtk_init (&argc, &argv);
+
+ pipeline = make_cdaudio_pipeline (threaded);
+
+ /* initialize gui elements ... */
+ window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+ hbox = gtk_hbox_new (FALSE, 0);
+ vbox = gtk_vbox_new (FALSE, 0);
+ play_button = gtk_button_new_with_label ("play");
+ pause_button = gtk_button_new_with_label ("pause");
+ stop_button = gtk_button_new_with_label ("stop");
+
+ adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.00, 100.0, 0.1, 1.0, 1.0));
+ hscale = gtk_hscale_new (adjustment);
+ gtk_scale_set_digits (GTK_SCALE (hscale), 2);
+ gtk_range_set_update_policy (GTK_RANGE (hscale), GTK_UPDATE_CONTINUOUS);
+
+ gtk_signal_connect(GTK_OBJECT(hscale),
+ "button_press_event", G_CALLBACK (start_seek), pipeline);
+ gtk_signal_connect(GTK_OBJECT(hscale),
+ "button_release_event", G_CALLBACK (stop_seek), pipeline);
+ gtk_signal_connect(GTK_OBJECT(hscale),
+ "format_value", G_CALLBACK (format_value), pipeline);
+
+ /* do the packing stuff ... */
+ gtk_window_set_default_size (GTK_WINDOW (window), 96, 96);
+ gtk_container_add (GTK_CONTAINER (window), vbox);
+ gtk_container_add (GTK_CONTAINER (vbox), hbox);
+ gtk_box_pack_start (GTK_BOX (hbox), play_button, FALSE, FALSE, 2);
+ gtk_box_pack_start (GTK_BOX (hbox), pause_button, FALSE, FALSE, 2);
+ gtk_box_pack_start (GTK_BOX (hbox), stop_button, FALSE, FALSE, 2);
+ gtk_box_pack_start (GTK_BOX (vbox), hscale, TRUE, TRUE, 2);
+
+ /* connect things ... */
+ g_signal_connect (G_OBJECT (play_button), "clicked", G_CALLBACK (play_cb), pipeline);
+ g_signal_connect (G_OBJECT (pause_button), "clicked", G_CALLBACK (pause_cb), pipeline);
+ g_signal_connect (G_OBJECT (stop_button), "clicked", G_CALLBACK (stop_cb), pipeline);
+ g_signal_connect (G_OBJECT (window), "delete_event", gtk_main_quit, NULL);
+
+ /* show the gui. */
+ gtk_widget_show_all (window);
+
+ gtk_main ();
+
+ gst_buffer_print_stats();
+ gst_event_print_stats();
+
+ return 0;
+}
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