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First working tutorial-5 (Toolkit integration)

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unknown 2012-04-17 18:28:05 +02:00
parent 86f2c5c9a3
commit 62fa2c46da
1 changed files with 149 additions and 15 deletions
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164
gst-sdk/tutorials/basic-tutorial-5.c
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@ -16,9 +16,13 @@
/* Structure to contain all our information, so we can pass it around */
typedef struct _CustomData {
GstElement *playbin2; /* Our one and only pipeline */
GstElement *xoverlay_element;
GtkWidget *main_window;
GtkWidget *video_window;
GtkWidget *slider;
GtkWidget *streams_list;
gboolean updating_slider;
GstState state;
gint64 duration;
@ -34,9 +38,9 @@ static void realize_cb (GtkWidget *widget, CustomData *data) {
GdkWindow *window = gtk_widget_get_window (widget);
/* This is here just for pedagogical purposes, GDK_WINDOW_XID will call it
* as well */ /*
* as well */
if (!gdk_window_ensure_native (window))
g_error ("Couldn't create native window needed for GstXOverlay!");*/
g_error ("Couldn't create native window needed for GstXOverlay!");
#if defined (GDK_WINDOWING_WIN32)
data->embed_xid = (guintptr)GDK_WINDOW_HWND (window);
@ -77,15 +81,22 @@ static gboolean draw_cb (GtkWidget *widget, GdkEventExpose *event, CustomData *d
cairo_fill (cr);
cairo_destroy (cr);
}
/*
if (app->xoverlay_element)
gst_x_overlay_expose (GST_X_OVERLAY (app->xoverlay_element));
*/
if (data->xoverlay_element)
gst_x_overlay_expose (GST_X_OVERLAY (data->xoverlay_element));
return FALSE;
}
static void slider_cb (GtkRange *range, CustomData *data) {
if (!data->updating_slider) {
gdouble value = gtk_range_get_value (GTK_RANGE (data->slider));
gst_element_seek_simple (data->playbin2, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT, (gint64)(value * GST_SECOND));
}
}
static void create_ui (CustomData *data) {
GtkWidget *controls, *main_box;
GtkWidget *controls, *main_box, *main_hbox;
GtkWidget *play_button, *pause_button, *stop_button;
data->main_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
@ -107,6 +118,10 @@ static void create_ui (CustomData *data) {
data->slider = gtk_hscale_new_with_range (0, 100, 1);
gtk_scale_set_draw_value (GTK_SCALE (data->slider), 0);
g_signal_connect (G_OBJECT (data->slider), "value-changed", G_CALLBACK (slider_cb), data);
data->streams_list = gtk_text_view_new ();
gtk_text_view_set_editable (GTK_TEXT_VIEW (data->streams_list), FALSE);
controls = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (controls), play_button, FALSE, FALSE, 2);
@ -114,8 +129,12 @@ static void create_ui (CustomData *data) {
gtk_box_pack_start (GTK_BOX (controls), stop_button, FALSE, FALSE, 2);
gtk_box_pack_start (GTK_BOX (controls), data->slider, TRUE, TRUE, 2);
main_hbox = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (main_hbox), data->video_window, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (main_hbox), data->streams_list, FALSE, FALSE, 2);
main_box = gtk_vbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (main_box), data->video_window, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (main_box), main_hbox, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (main_box), controls, FALSE, FALSE, 0);
gtk_container_add (GTK_CONTAINER (data->main_window), main_box);
gtk_window_set_default_size (GTK_WINDOW (data->main_window), 640, 480);
@ -142,11 +161,25 @@ static gboolean refresh_ui (CustomData *data) {
}
if (gst_element_query_position (data->playbin2, &fmt, &current)) {
data->updating_slider = TRUE;
gtk_range_set_value (GTK_RANGE (data->slider), (gdouble)current / GST_SECOND);
data->updating_slider = FALSE;
}
return TRUE;
}
static void reset_app (CustomData *data) {
if (data->xoverlay_element)
gst_object_unref (data->xoverlay_element);
gst_object_unref (data->playbin2);
}
static void tags_cb (GstElement *playbin2, gint stream, CustomData *data) {
gst_element_post_message (playbin2,
gst_message_new_application (GST_OBJECT (playbin2),
gst_structure_new ("tags-changed", NULL)));
}
int main(int argc, char *argv[]) {
CustomData data;
GstStateChangeReturn ret;
@ -173,6 +206,11 @@ int main(int argc, char *argv[]) {
/* Set the URI to play */
g_object_set (data.playbin2, "uri", "http://docs.gstreamer.com/media/sintel_trailer-480p.webm", NULL);
/* Connect to interesting signals in playbin2 */
g_signal_connect (G_OBJECT (data.playbin2), "video-tags-changed", (GCallback) tags_cb, &data);
g_signal_connect (G_OBJECT (data.playbin2), "audio-tags-changed", (GCallback) tags_cb, &data);
g_signal_connect (G_OBJECT (data.playbin2), "text-tags-changed", (GCallback) tags_cb, &data);
create_ui (&data);
bus = gst_element_get_bus (data.playbin2);
@ -188,16 +226,95 @@ int main(int argc, char *argv[]) {
return -1;
}
g_timeout_add (500, (GSourceFunc)refresh_ui, &data);
// add timeout to refresh UI: query position and duration (if unknown), gtk_range_set_value() on the slider
/* Register a function that GTK will call every second */
g_timeout_add (1000, (GSourceFunc)refresh_ui, &data);
gtk_main ();
/* Free resources */
gst_element_set_state (data.playbin2, GST_STATE_NULL);
gst_object_unref (data.playbin2);
reset_app (&data);
return 0;
}
/* Extract metadata from all the streams */
static void analyze_streams (CustomData *data) {
gint i;
GstTagList *tags;
gchar *str, total_str[8192];
guint rate;
gint n_video, n_audio, n_text;
GtkTextBuffer *text;
GtkTextIter text_start, text_end;
/* Clean current contents of the widget */
text = gtk_text_view_get_buffer (GTK_TEXT_VIEW (data->streams_list));
gtk_text_buffer_get_start_iter (text, &text_start);
gtk_text_buffer_get_end_iter (text, &text_end);
gtk_text_buffer_delete (text, &text_start, &text_end);
/* Read some properties */
g_object_get (data->playbin2, "n-video", &n_video, NULL);
g_object_get (data->playbin2, "n-audio", &n_audio, NULL);
g_object_get (data->playbin2, "n-text", &n_text, NULL);
for (i = 0; i < n_video; i++) {
tags = NULL;
/* Retrieve the stream's video tags */
g_signal_emit_by_name (data->playbin2, "get-video-tags", i, &tags);
if (tags) {
g_snprintf (total_str, sizeof (total_str), "video stream %d:\n", i);
gtk_text_buffer_insert_at_cursor (text, total_str, -1);
gst_tag_list_get_string (tags, GST_TAG_VIDEO_CODEC, &str);
g_snprintf (total_str, sizeof (total_str), " codec: %s\n", str ? str : "unknown");
gtk_text_buffer_insert_at_cursor (text, total_str, -1);
g_free (str);
gst_tag_list_free (tags);
}
}
for (i = 0; i < n_audio; i++) {
tags = NULL;
/* Retrieve the stream's audio tags */
g_signal_emit_by_name (data->playbin2, "get-audio-tags", i, &tags);
if (tags) {
g_snprintf (total_str, sizeof (total_str), "\naudio stream %d:\n", i);
gtk_text_buffer_insert_at_cursor (text, total_str, -1);
if (gst_tag_list_get_string (tags, GST_TAG_AUDIO_CODEC, &str)) {
g_snprintf (total_str, sizeof (total_str), " codec: %s\n", str);
gtk_text_buffer_insert_at_cursor (text, total_str, -1);
g_free (str);
}
if (gst_tag_list_get_string (tags, GST_TAG_LANGUAGE_CODE, &str)) {
g_snprintf (total_str, sizeof (total_str), " language: %s\n", str);
gtk_text_buffer_insert_at_cursor (text, total_str, -1);
g_free (str);
}
if (gst_tag_list_get_uint (tags, GST_TAG_BITRATE, &rate)) {
g_snprintf (total_str, sizeof (total_str), " bitrate: %d\n", rate);
gtk_text_buffer_insert_at_cursor (text, total_str, -1);
}
gst_tag_list_free (tags);
}
}
for (i = 0; i < n_text; i++) {
tags = NULL;
/* Retrieve the stream's subtitle tags */
g_signal_emit_by_name (data->playbin2, "get-text-tags", i, &tags);
if (tags) {
g_snprintf (total_str, sizeof (total_str), "\nsubtitle stream %d:\n", i);
gtk_text_buffer_insert_at_cursor (text, total_str, -1);
if (gst_tag_list_get_string (tags, GST_TAG_LANGUAGE_CODE, &str)) {
g_snprintf (total_str, sizeof (total_str), " language: %s\n", str);
gtk_text_buffer_insert_at_cursor (text, total_str, -1);
g_free (str);
}
gst_tag_list_free (tags);
}
}
}
static gboolean handle_message (GstBus *bus, GstMessage *msg, CustomData *data) {
GError *err;
gchar *debug_info;
@ -209,7 +326,7 @@ static gboolean handle_message (GstBus *bus, GstMessage *msg, CustomData *data)
g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none");
g_clear_error (&err);
g_free (debug_info);
gtk_main_quit ();
gst_element_set_state (data->playbin2, GST_STATE_READY);
break;
case GST_MESSAGE_EOS:
g_print ("End-Of-Stream reached.\n");
@ -223,10 +340,16 @@ static gboolean handle_message (GstBus *bus, GstMessage *msg, CustomData *data)
g_print ("State set to %s\n", gst_element_state_get_name (new_state));
}
} break;
case GST_MESSAGE_APPLICATION:
if (g_strcmp0 (gst_structure_get_name (msg->structure), "tags-changed") == 0) {
analyze_streams (data);
}
break;
}
return TRUE;
}
static GstBusSyncReply bus_sync_handler (GstBus *bus, GstMessage *msg, CustomData *data) {
/*ignore anything but 'prepare-xwindow-id' element messages */
if (GST_MESSAGE_TYPE (msg) != GST_MESSAGE_ELEMENT)
@ -236,8 +359,19 @@ static GstBusSyncReply bus_sync_handler (GstBus *bus, GstMessage *msg, CustomDat
if (data->embed_xid != 0) {
/* GST_MESSAGE_SRC (message) will be the video sink element */
GstXOverlay *xoverlay = GST_X_OVERLAY (GST_MESSAGE_SRC (msg));
gst_x_overlay_set_window_handle (xoverlay, data->embed_xid);
GstElement *sink = GST_ELEMENT (GST_MESSAGE_SRC (msg));
/* If we were tracking a previous video sink, release it */
if (data->xoverlay_element != NULL)
gst_object_unref (data->xoverlay_element);
/* Get a reference to the new sink */
data->xoverlay_element = GST_ELEMENT (gst_object_ref (sink));
if (g_object_class_find_property (G_OBJECT_GET_CLASS (sink), "force-aspect-ratio")) {
g_object_set (sink, "force-aspect-ratio", TRUE, NULL);
}
gst_x_overlay_set_window_handle (GST_X_OVERLAY (sink), data->embed_xid);
} else {
g_warning ("Should have obtained an xid by now!");
}