#include "Mp3.h"
int main(int argc, char *argv[])
{
GtkBuilder *builder;
gtk_init(&argc, &argv);
gst_init(&argc, &argv);
builder= gtk_builder_new();
gtk_builder_add_from_file(builder, "Mp3.glade", NULL);
main_window = GTK_WIDGET(gtk_builder_get_object(builder, "MainWindow"));
//gtk_widget_set_size_request(main_window, 300, 260);
play_button = GTK_WIDGET(gtk_builder_get_object(builder, "play_button"));
pause_button = GTK_WIDGET(gtk_builder_get_object(builder, "pause_button"));
stop_button = GTK_WIDGET(gtk_builder_get_object(builder, "stop_button"));
open_file = GTK_WIDGET(gtk_builder_get_object(builder, "open_file"));
status_label = GTK_WIDGET(gtk_builder_get_object(builder, "status_label"));
time_label = GTK_WIDGET(gtk_builder_get_object(builder, "time_label"));
seek_scale = GTK_WIDGET(gtk_builder_get_object(builder, "seek_scale"));
//GtkAdjustment *adj=gtk_adjustment_new(0,0,100,1,1,100);
gtk_range_set_adjustment(GTK_SCALE(seek_scale),
GTK_ADJUSTMENT(gtk_adjustment_new(0,0,100,1,1,0.1)));
artist_label = GTK_WIDGET(gtk_builder_get_object(builder, "artist_label"));
title_label = GTK_WIDGET(gtk_builder_get_object(builder, "title_label"));
gtk_widget_set_sensitive(GTK_WIDGET(stop_button), FALSE);
gtk_widget_set_sensitive(GTK_WIDGET(play_button), FALSE);
gtk_widget_set_sensitive(GTK_WIDGET(pause_button), FALSE);
g_signal_connect(play_button, "clicked", G_CALLBACK(play_clicked), NULL);
g_signal_connect(pause_button, "clicked", G_CALLBACK(pause_clicked), NULL);
g_signal_connect(stop_button, "clicked", G_CALLBACK(stop_clicked), NULL);
g_signal_connect(seek_scale, "value-changed", G_CALLBACK(seek_value_changed), NULL);
g_signal_connect(open_file, "clicked", G_CALLBACK(open_file_clicked), NULL);
gtk_builder_connect_signals(builder, NULL);
g_object_unref(G_OBJECT(builder));
gtk_widget_show_all(main_window);
gtk_main();
return 0;
}
/* Handler for File->Open action */
static void open_file_clicked(GtkWidget *widget, gpointer data)
{
/* Construct a GtkFileChooser */
GtkWidget *file_chooser = gtk_file_chooser_dialog_new(
"Open File", GTK_WINDOW(main_window),
GTK_FILE_CHOOSER_ACTION_OPEN,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
NULL);
/* Run the dialog and if the user pressed the accept button... */
if (gtk_dialog_run(GTK_DIALOG(file_chooser)) == GTK_RESPONSE_ACCEPT)
{
/* ...get the URI of the chosen file */
char *filename;
filename = gtk_file_chooser_get_uri(GTK_FILE_CHOOSER(file_chooser));
/* In case we're already playing a file, simulate a press of the stop button */
g_signal_emit_by_name(G_OBJECT(stop_button), "clicked");
if (current_filename) g_free(current_filename);
current_filename = filename;
/* Load the selected file */
if (load_file(filename))
gtk_widget_set_sensitive(GTK_WIDGET(play_button), TRUE);
}
gtk_widget_destroy(file_chooser);
}
/* Handler for play button click event */
static void play_clicked(GtkWidget *widget, gpointer data)
{
if (current_filename)
{
if (play_file())
{
gtk_widget_set_sensitive(GTK_WIDGET(stop_button), TRUE);
gtk_widget_set_sensitive(GTK_WIDGET(pause_button), TRUE);
}
else
{
g_print("Failed to play\n");
}
}
}
static void pause_clicked(GtkWidget *widget, gpointer data)
{
if (play) {
GstState state;
gst_element_get_state(play, &state, NULL, -1);
if(state == GST_STATE_PLAYING){
gst_element_set_state(play, GST_STATE_PAUSED);
gtk_button_set_label(GTK_BUTTON(pause_button), "继续");
gtk_widget_set_sensitive(GTK_WIDGET(stop_button), FALSE);
gtk_widget_set_sensitive(GTK_WIDGET(play_button), FALSE);
}
else if(state == GST_STATE_PAUSED){
gst_element_set_state(play, GST_STATE_PLAYING);
gtk_button_set_label(GTK_BUTTON(pause_button), "暂停");
gtk_widget_set_sensitive(GTK_WIDGET(stop_button), TRUE);
gtk_widget_set_sensitive(GTK_WIDGET(play_button), TRUE);
}
return ;
}
}
/* Handler for stop button click */
static void stop_clicked(GtkWidget *widget, gpointer data)
{
/* Remove the timeout function */
if (timeout_source) g_source_remove(timeout_source);
timeout_source = 0;
/* Stop playback and delete the pipeline */
if (play) {
gst_element_set_state(play, GST_STATE_NULL);
//gst_object_unref(GST_OBJECT(play));
//play = NULL;
}
/* Update the GUI */
initgui();
}
/* Handler for user moving seek bar */
static void seek_value_changed(GtkRange *range, gpointer data)
{
if (no_seek) return;
gdouble val = gtk_range_get_value(range);
seek_to(val);
}
/* Takes time values and formats them for the time label and seek slider */
void gui_update_time(const gchar *time, const gint64 position, const gint64 length)
{
gtk_label_set_text(GTK_LABEL(time_label), time);
if (length > 0) {
no_seek = TRUE;
gtk_range_set_value(GTK_RANGE(seek_scale), ((gdouble)position / (gdouble)length) * 100.0);
no_seek = FALSE;
}
}
/* Convenience function to update title and artist display */
void gui_update_metadata(const gchar *title, const gchar *artist)
{
gtk_label_set_text(GTK_LABEL(title_label), title);
gtk_label_set_text(GTK_LABEL(artist_label), artist);
}
/* Convenience function to stop displaying metadata */
void gui_clear_metadata(void)
{
gtk_label_set_text(GTK_LABEL(title_label), "");
gtk_label_set_text(GTK_LABEL(artist_label), "");
}
/* Callback function invoked when a message arrives on the playback
* pipeline's bus. */
static gboolean bus_callback (GstBus *bus, GstMessage *message, gpointer data)
{
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_ERROR: {
/* An error has occurred.
* A real application would probably need to handle this more
* intelligently than just quitting. */
GError *err;
gchar *debug;
gst_message_parse_error(message, &err, &debug);
g_print("Error: %s\n", err->message);
g_error_free(err);
g_free(debug);
gtk_main_quit();
break;
}
case GST_MESSAGE_EOS:
/* The pipeline has reached the end of the stream. */
g_print("End of stream\n");
g_signal_emit_by_name(G_OBJECT(stop_button), "clicked");
initgui();
break;
case GST_MESSAGE_TAG: {
/* The stream discovered new tags. */
GstTagList *tags;
gchar *title = "";
gchar *artist = "";
/* Extract from the message the GstTagList.
* This generates a copy, so we must remember to free it.*/
gst_message_parse_tag(message, &tags);
/* Extract the title and artist tags - if they exist */
if (gst_tag_list_get_string(tags, GST_TAG_TITLE, &title)
&& gst_tag_list_get_string(tags, GST_TAG_ARTIST, &artist))
gui_update_metadata(title, artist);
/* Free the tag list */
gst_tag_list_free(tags);
break;
}
default:
/* Another message occurred which we are not interested in handling. */
break;
}
/* We have handled this message, so indicate that it should be removed from
* the queue.*/
return TRUE;
}
/* This function is called every 200 milliseconds.
* It retrieves the pipeline's playback position and updates the GUI with it. */
static gboolean update_time_callback(GstElement *pipeline)
{
GstFormat fmt = GST_FORMAT_TIME;
gint64 position;
gint64 length;
gchar time_buffer[25];
if (gst_element_query_position(pipeline, &fmt, &position) && gst_element_query_duration(pipeline, &fmt, &length)) {
g_snprintf(time_buffer, 24, "%u:%02u:%02u", GST_TIME_ARGS(position));
gui_update_time(time_buffer, position, length);
}
return TRUE;
}
/* Given a URI, constructs a pipeline to play it.
* Uses GStreamer's supplied 'playbin' element as an automatic solution */
static gboolean build_gstreamer_pipeline(const gchar *uri)
{
/* Destroy the pipeline if there is one already to avoid leaks */
if (play) {
gs
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