From 24b04aade4329e369f3ad8e5aca9f8c12adfc644 Mon Sep 17 00:00:00 2001
From: Thiago Santos <thiagoss@osg.samsung.com>
Date: Wed, 14 Jan 2015 10:35:34 -0300
Subject: [PATCH] examples: playback: add labels with supported seek range

Add the supported seeking range in the advanced seek area.
Also implement seeking querying the pipeline to retrieve those
values and show to the user. It is done in a smaller frequency
compared to the position/duration querying.
---
 tests/examples/playback/playback-test.c | 56 +++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/tests/examples/playback/playback-test.c b/tests/examples/playback/playback-test.c
index 514d499d04..7486931d5b 100644
--- a/tests/examples/playback/playback-test.c
+++ b/tests/examples/playback/playback-test.c
@@ -77,6 +77,7 @@ typedef enum
 //#define UPDATE_INTERVAL 500
 //#define UPDATE_INTERVAL 100
 #define UPDATE_INTERVAL 40
+#define SLOW_UPDATE_INTERVAL 500
 
 /* number of milliseconds to play for after a seek */
 #define SCRUB_TIME 100
@@ -118,6 +119,7 @@ typedef struct
   GtkWidget *subtitle_fontdesc_button;
 
   GtkWidget *seek_format_combo, *seek_position_label, *seek_duration_label;
+  GtkWidget *seek_start_label, *seek_stop_label;
   GtkWidget *seek_entry;
 
   GtkWidget *seek_scale, *statusbar;
@@ -174,6 +176,7 @@ typedef struct
   gint64 buffering_left;
   GstState state;
   guint update_id;
+  guint slow_update_id;
   guint seek_timeout_id;        /* Used for scrubbing in paused */
   gulong changed_id;
   guint fill_id;
@@ -427,6 +430,37 @@ update_fill (PlaybackApp * app)
   return TRUE;
 }
 
+static gboolean
+update_seek_range (PlaybackApp * app)
+{
+  GstFormat format = GST_FORMAT_TIME;
+  gint64 seek_start, seek_stop;
+  gboolean seekable;
+  GstQuery *query;
+
+  query = gst_query_new_seeking (format);
+  if (gst_element_query (app->pipeline, query)) {
+    gchar *str;
+
+    gst_query_parse_seeking (query, &format, &seekable, &seek_start,
+        &seek_stop);
+    if (!seekable) {
+      seek_start = seek_stop = -1;
+    }
+
+    str = g_strdup_printf ("%" G_GINT64_FORMAT, seek_start);
+    gtk_label_set_text (GTK_LABEL (app->seek_start_label), str);
+    g_free (str);
+
+    str = g_strdup_printf ("%" G_GINT64_FORMAT, seek_stop);
+    gtk_label_set_text (GTK_LABEL (app->seek_stop_label), str);
+    g_free (str);
+  }
+  gst_query_unref (query);
+
+  return TRUE;
+}
+
 static gboolean
 update_scale (PlaybackApp * app)
 {
@@ -620,11 +654,20 @@ set_update_scale (PlaybackApp * app, gboolean active)
       app->update_id =
           g_timeout_add (UPDATE_INTERVAL, (GSourceFunc) update_scale, app);
     }
+    if (app->slow_update_id == 0) {
+      app->slow_update_id =
+          g_timeout_add (SLOW_UPDATE_INTERVAL, (GSourceFunc) update_seek_range,
+          app);
+    }
   } else {
     if (app->update_id) {
       g_source_remove (app->update_id);
       app->update_id = 0;
     }
+    if (app->slow_update_id) {
+      g_source_remove (app->slow_update_id);
+      app->slow_update_id = 0;
+    }
   }
 }
 
@@ -2579,6 +2622,7 @@ create_ui (PlaybackApp * app)
     GtkWidget *skip_checkbox, *rate_spinbutton;
     GtkWidget *flagtable, *advanced_seek, *advanced_seek_grid;
     GtkWidget *duration_label, *position_label, *seek_button;
+    GtkWidget *start_label, *stop_label;
 
     seek = gtk_expander_new ("seek options");
     flagtable = gtk_grid_new ();
@@ -2692,6 +2736,18 @@ create_ui (PlaybackApp * app)
     gtk_grid_attach (GTK_GRID (advanced_seek_grid), app->seek_duration_label, 3,
         1, 1, 1);
 
+    start_label = gtk_label_new ("Seek start:");
+    gtk_grid_attach (GTK_GRID (advanced_seek_grid), start_label, 4, 0, 1, 1);
+    stop_label = gtk_label_new ("Seek stop:");
+    gtk_grid_attach (GTK_GRID (advanced_seek_grid), stop_label, 4, 1, 1, 1);
+
+    app->seek_start_label = gtk_label_new ("-1");
+    gtk_grid_attach (GTK_GRID (advanced_seek_grid), app->seek_start_label, 5,
+        0, 1, 1);
+    app->seek_stop_label = gtk_label_new ("-1");
+    gtk_grid_attach (GTK_GRID (advanced_seek_grid), app->seek_stop_label, 5,
+        1, 1, 1);
+
     gtk_container_add (GTK_CONTAINER (advanced_seek), advanced_seek_grid);
     gtk_grid_attach (GTK_GRID (flagtable), advanced_seek, 0, 3, 3, 2);
     gtk_container_add (GTK_CONTAINER (seek), flagtable);